JPS608B2 - hay making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hay-making machine for collecting and drying grass, which is equipped with one or several rotatably driven rake wheels, the rake wheels having a , a plurality of work tool carrying arms are pivotally mounted in an outwardly extending bearing support in a bearing support coupled to the drive hub, each of the power tool carrying arms extending outwardly from the lever. It comprises a control crank with a roller at its rotating end in the direction of the axis of rotation of the associated rake wheel.

In known machines of this type, the rollers of the control crank of the carrying arm of the working tool move the working tool during grazing.
In some areas of their tracks, they move in a control cam with a single guide line in order to pivot upwardly and in a direction opposite to the direction of rotation of the rake wheels to which they belong. Also for drying the grass it is necessary to: - move the loaf of the control crank outwards, thereby separating the roller from the control cam; However, for grass collection, the roller is specially designed to contact the control cam, and for drying,
This roller displacement operation, which holds the roller away from the control cam, requires difficult adjustments. moreover,
Each of the carrying arms must be separately brought to a drying position and immobilized in that position, non-rotatably about its longitudinal axis, which gives the user an indication of the current time. forced to waste.

In other known machines of this kind, the rollers of the control cranks of the working odor-carrying arms move the working tools upwards and in the rotation of the rake wheels to which they belong in some areas of their tracks during weeding. It is twisted and pressed against a control cam with a single guide line for pivoting in the opposite direction. In this machine, the tool-carrying arm of one and the same rake wheel is lifted from the weeding position to the drying position by releasing the control cam downward until the rollers of its control crank disengage from the control cam. He will come.

The major drawback of this embodiment lies in the following fact.

When the machine is transferred from its grass collecting position to its drying position or vice versa, the control cam must be moved axially. This is by no means desirable if we consider that strength affects the trajectory drawn by the working tool during grass collection and, therefore, the quality of the grass collection operation. During the process, when the longitudinal axis accommodating the carrying arm of the working tool in the bearing support extends in a plane parallel to the direction of advance of the machine, the axis of rotation of the rake wheel to which it belongs is included. The angle it forms with the plane perpendicular to the direction of advancement remains unchanged.For this reason,
It is necessary to move the support wheels relative to the ground downwards so that the rake wheels can be given a suitable inclination to carry out the drying operation. Furthermore, ``Since the above-mentioned angle does not change during the transition from the grass-collecting position to the drying position, the working tool, viewed from the forward direction, is aligned with the axis of rotation of the rake wheel both in front of and behind the rake wheel. Maintaining the same position vertically and almost perpendicular to the plane containing the end of the work tool.This ensures a good grasp of the grass in front of the rake wheels and a good grasp of the grass behind the rake wheels. In this machine, even if a transition is made from the grass-collecting position to the drying position, the diameter of the track traced by the working tool is not increased in the slightest; This impairs the quality of drying operations on machines equipped with rake wheels.
Furthermore, the torsion springs pressing the rollers against the guide cams are constantly being pulled during the working period, which leads to rapid fatigue of the springs and a significant reduction in working quality, especially when the grass to be moved is not dry. This is followed by a significant reduction in the drying effect when heavy.In other machines of the type to which the present invention relates, the rollers, which are integral with the control crank of the tool-carrying arm, are guided by a guide whose contour is changed. Move on the cam.

However, considering that the rigidity of the cam determines the quality of the work, it is not desirable to interfere with the cam due to the transition from the grass collecting position to the drying position or vice versa. Furthermore, from a construction standpoint, it is difficult to make guide cams with variable contours. In addition, in this machine, during the transition to the drying position, the diameter of the track drawn by the working tool does not increase, and during the transition from the grass collecting position to the drying position, the working tool is carried in the bearing support. When the vertical axis that accommodates the arm extends in a plane parallel to the forward direction of the machine, the distance between the vertical axis and the plane perpendicular to the forward direction that includes the rotational axis of the rake wheel to which it belongs The angle formed by the angle does not change. In the last known machine,
The roller of the control crank of the carrying arm of the work tool moves on a control cam having two guideways.

One of the guideways can guide the rollers during grass collection, and the other one can guide the rollers during grass collection, and the other one can guide the rollers while transporting the machine, so that when transporting the machine, all of them do not touch the ground. Therefore, this machine has a different action and result from the present invention.Furthermore, in this known machine, when the rollers move from the grass collection guideway to the transport guideway, When the longitudinal axis accommodating the carrying arm of the working tool in the bearing support extends in a plane parallel to the direction of advance of the machine, the longitudinal axis includes the axis of rotation of the rake wheel to which it belongs. The angle formed with the plane perpendicular to the direction does not change.The object of the present invention is to obtain a hay-making machine for collecting and drying grass, which eliminates the disadvantages and drawbacks of known machines such as those mentioned above. It is an object.

Based on the features of the invention, the rollers of the control crank of the tool-carrying arm move during operation in a control cam having two guideways, one of which is connected to the control crank of the same rake wheel. the rollers to be guided during the weeding operation; when the longitudinal axis which accommodates the carrying arm of the machine extends in a plane parallel to the direction of advance of the machine, said longitudinal axis is almost perpendicular to the direction of advance which contains the axis of rotation of the rake wheel to which it belongs. The angle formed by the longitudinal axis which accommodates the carrying arm of the working tool in the bearing support during drying extends in a plane parallel to the direction of advance of the machine. , is larger than the angle formed between the axis of rotation of the rake wheel to which it belongs and the plane perpendicular to the included forward direction.

According to another feature of the invention, the rollers of the control cranks of the tool-carrying arms of the same rake wheel are arranged so that the tool-carrying arms and The bearing supports are displaced by pivoting them outwardly about their points of articulation on the drive hub.

This transfer is effected by the effect of centrifugal force when the rake wheel is rotated and the tool carrying arm and its bearing support are unlocked from the weeding position. Also in accordance with another characteristic of the invention, the rollers of the control cranks of the tool-carrying arms of the same rake wheel move the tool-carrying arm from the guideway to be guided during drying to the guideway to be guided during weeding. The arms and their bearing supports are displaced by pivoting inwardly about their points of articulation at the drive hub.

This displacement is due to the self-weight of the tool carrying arm, bearing support and power tool when the hand wheel is almost stopped and the tool carrying arm and its bearing support are unlocked from the dry position. This is especially true due to the effects of The invention will now be explained in detail with reference to the accompanying drawings of embodiments thereof, which are shown in a non-limiting manner.

The hay-making machine for collecting and drying grass according to the invention comprises two rake wheels 1 and 2 connected by a crosspiece 3, as shown in FIGS. 1 and 2.

The machine is connected to a drive tractor (not shown), for example by a three-point chain device 4. As is well known, these rake wheels are driven by driving force coming from the tractor's power source via gears 8, 9 and 10 around their respective rotating shafts 6 and 7. They are rotationally driven and can be rotated in opposite directions or in the same direction.Thus, in the case of machines with two rake wheels, these rake wheels simultaneously move forward for collecting and drying. When looking in the direction,
Concentrate forward rotation. In other words, the raking wheels of the machine according to the invention can be rotated in a concentrated forward direction (when viewed in the forward direction) for drying and can be rotated in the same rotation relative to the collected grass in order to lay the grass aside. In this last case, the yokomura 3 can be placed obliquely to the forward direction of the machine, so that one rake wheel is placed in front of the other rake wheel. , the grass to be collected is conveniently transferred from one rake wheel to another rake wheel.In each rake wheel 1 and 2 a working tool 12, such as a rake, a tooth or the like, is carried. An arm 11 is rotatably supported in a bearing support 13 (see FIGS. 3 and 4).

Each bearing support 13 is connected to a drive hub 14 via an articulation shaft 15.
is related to. Each carrying arm 11 of the working tool 12 is equipped at its rotating end, located in the direction of the axis of rotation 6 or 7 of the rake wheel 1 or 2 to which it belongs, with a control crank 16 having a roller 17 . According to the invention, the roller 7 moves in a control cam 18 having two guideways 19, 20 also during the working time, i.e. when the rake wheels 1 and 2 are driven in rotation, and the guide One of the tracks is to guide the rollers 7 of the same rake wheel during the weeding operation, and the other of the guideways is to guide the loaf 17 during the drying operation.

Thus, the rake wheels 1 and 2 can be applied to the control cam 18 without having to pull the roller 7 of the control crank 16 away from the control cam 18 or to move the cam in the direction of the ball or change its profile. It can be moved from the grass collecting position to the drying position without any interference. According to an important feature of the invention, during weeding, when the longitudinal axis 21 accommodating 22 the carrying arm 11 of the working tool in the bearing support 13 extends in a plane P parallel to the direction of advance of the machine, The vertical axis is the rotation axis 6 or 7 of the rake wheel 1 or 2 to which it belongs.
During drying, the angle Q (see Figures 1 and 3) formed between the
When the longitudinal axis 21, which accommodates the carrying arm 11 of the working tool in the bearing support 13, extends in a parallel plane P parallel to the direction of advance of the machine, the longitudinal axis 21 is connected to the rake wheel 1 to which it belongs. or larger than the angle B (see FIGS. 2 and 4) that it forms with a plane L that is almost perpendicular to the direction of advancement and includes the axis of rotation 6 or 7 of 2.

This feature makes it possible to use the rake wheels 1 and 2 for drying work.
can be tilted by a suitable angle in the forward direction by a device such as a threaded handle 23 that rotates the equipment 3 relative to the three-point coupling device 4, thereby eliminating the need to move the support wheels 5 relative to the ground downwards. This allows the grass to be spread effectively and at the same time to be conveniently grasped in front of the raking wheel and conveniently released behind it. According to the invention, in the control cam 18, the diameter A (see FIG. 4) of the guide path 19 through which the loaf 17 of the control crank 16 of the tool-carrying arm 11 is guided during drying.
is larger than the diameter B (see FIG. 3) of the guideway 20 in which the roller 7 is to be guided during grass collection.

For this purpose, during grass collection, the loaf 17 of the control crank 16 is
from the guideway 20 to which the roller 7 is to be guided during drying.
The displacement of the loaf into the conduit 19 in which it is to be guided causes an increase in the diameter of the track T defined by the working tool 12 during drying. , in the case of machines equipped with two or more rake wheels, "of good quality, considering that the distance between the tracks defined by the working tools of two adjacent rake wheels is considerably reduced. A drying operation is expected.The track itself covers deeply between the axes of rotation of two adjacent rake wheels.Thanks to the control cam with two guideways 19 and 20~ the working tool of the machine according to the invention 12 is simultaneously extremely advantageously controlled during harvesting and drying.

For this purpose, the guideway 20, in which the rollers 17 of the control crank 16 of the tool-carrying armrest 1 are guided during weeding, is provided with undulations 24, as is known per se, so that the working tools 12 is rotated via the control crank 16 in a partial area of its track in a direction higher and opposite to the direction of rotation of the rake wheel to which it belongs, in order to place the leveled grass in a row. During drying, the guideway 19 through which the roller 17 of the control crank 16 of the tool-carrying arm 11 is guided is almost flat over its entire length, so that the working tool 1
2 is held in a position almost perpendicular to the ground in its entire trajectory so that a strong drying of the pasture is obtained.However, in the variant shown diagrammatically in FIG. During this period, the guideway 19 that should guide the rollers 7 of the control crank 16 increases the length of the working zone W-X in which the working tool 12 approaches the ground in the front part of its trajectory (see FIG. 2). In order to
As seen in the forward direction of the machine, as it approaches a point on the trajectory of the tool at the forefront, it rotates slightly upward and in the opposite direction to the direction of rotation of the rake wheel to which it belongs, and passes through the point. Sometimes the tools are formed to gradually return to their original position. During drying, the rake wheels 1, 2 are tilted forward in the forward direction so that "the working tool 12 of the same rake wheel can be moved almost parallel to the ground on an arc of a certain length. The working tool 12 can reach all of the pasture spread over the length of the circular arc.The working tool 12 is also located within the working area x-Y, within which two adjacent If the trajectories traced by the working tools 12 of the two rake wheels overlap (see FIG. 2), this guideway 19 can be provided with further undulations 37, by means of which the working tools 12 are upwardly and It is rotated slightly in the direction of rotation of the rake wheel to which it belongs.

This rotation subjects the working tool 12 to a very aggressive action, which causes the tool to violently manipulate the grass and spread it effectively. Furthermore, the guideway 19 for drying
"can be provided with other reliefs 38, and this relief is "
In the working area Y-Z following the aforementioned area where the trajectories drawn by the working tool 12 overlap, the working tool 12 is slightly rotated upwards and in a direction opposite to the direction of rotation of the rake wheel to which the tool belongs. Thanks to this rotation, the rotational speed of the end of the working tool i2 is slowed down in order to facilitate the release of grass from the working tool 12. In the area located between points Z and W, the "working" The tools 12 gradually return to their starting condition, ie, nearly perpendicular to the ground.

In order to be able to transfer the roller 17 of the control crank 16 of the tool-carrying arm 11 from the guideway 20 in which it is to be guided during grass collection onto the guideway 19 in which it is to be guided during drying, The diameter C of the roller 17 is at least equal to or greater than the sum of the height of the undulations of the guideway 20 through which the roller 17 is to be guided during grass collection and the diameter D of the tool-carrying arm 11. 3).An important feature of the invention is that the roller T of the control crank 16 of the tool-carrying arm 11 of the same rake wheel 1 or 2 is connected to the guideway on which it is to be guided during the weeding process. 20 to the guideway 19 in which the rollers are to be guided during drying, the tool-carrying arms 11 and their bearing supports 13 are directed outwardly around their articulation point '5 in the drive hub 14. This displacement is carried out by the effect of centrifugal force when the rake wheels are driven in rotation and the tool carrying arms 11 and their bearing supports 13 are unlocked from the cutting position. .

All the working tools of the same rake wheel 1 or 2 are thus brought into the drying position at the same time without having to make individual adjustments to each of the tool carrying arms 11. In the opposite case, the loaves 17 of the control crank 16 of the tool-carrying arm 11 of the same rake wheel 1 or 2 should yield them during weeding, from the guideway 19 which should guide them during drying. Tool carrying arms 11 and their bearing supports 1 to the guideway 20
3 are displaced by pivoting them inwardly around their point of articulation 15 in the drive hub 14, which displacement occurs when the rake wheels are nearly stopped and the tool carrying the tool carrying arms 11 when the arms 11 and their bearing supports 13 are unlocked from the dry position;
This takes place in particular due to the effect of the self-weight of the bearing support 13 and the working tool 12. During operation, the tool carrying arm 1
The rollers 7 of the control cranks 16 of 1 are placed on the guide wheels 1 or 1 to which they belong on the guideways 9 that are to guide them during drying or on the guideways 20 that are to guide them during weeding. The positioning section 25 is rotatably mounted on the shaft support 26 of the second
(see figure).

This positioning member 25 is the same as the rake wheel 1 or 2.
are connected to the bearing supports 13 of the tool-carrying arms 11 by a thread 27, immobilizing the tool-carrying arms 11 and their bearing supports 13 in two different positions. One position thereof is ``close to the rattan support 26 of the rake wheel 1 or 2, and the trawler 17 is placed on the guideway 20 which is to guide them during grass collection (Figs. 3 and 6). The other position is further away from the rattan support 26 and the rollers 7 are placed on the guideway 19 to guide them during drying (see Figures 4 and 7). All bearing supports 13 of the tool carrying arm 11 of the hand wheel 1 or 2
Since the arms 11 are connected to one and the same positioning section 25, one or more of these arms 11 may also be provided with manual control so as to pivot around the joint 15 in the drive hub 14. By applying a pulling operation, all the arms 11 are simultaneously transferred from the grass-collecting position to the drying position.This transfer thus does not require individual adjustments to each tool-carrying arm 11. Each time the roller 17 of the crank 16 is shifted from one guideway to another, one angle and rotation of the positioning member 25 is induced around the shaft support 26 of the rake wheel 1 or 2 to which it belongs. Ru.

In order to hold the rollers 17 of the control crank 16 on the guideway 19 to which they are to be guided during drying or on the guideway 20 to which they are to be guided during weeding, a positioning member 2 is provided.
5 can be locked against rotation with respect to the drive hub 14. In a first embodiment of the invention, this locking is effected by means of a spring-loaded bolt 28 mounted on a protective cover 29 which is integral with the drive hub 14.

For this purpose, the spring-loaded bolt 28 has at least one engagement protrusion 30 and is automatically engaged by the arm 34 into the holes 31 and 32 of the positioning plate 33 integrated with the positioning member 25. I can do it. The holes "both have the same contour as the spring bolt 28 and are arranged symmetrically with respect to the axis 35 passing between them.
When the spring-loaded bolt 28 is engaged in the hole 31 of the positioning plate 33, the positioning member 25 moves the roller 1 during grass collection.
The control crank of the same rake wheel 1 or 2 also holds all the loaves 17 of 6 on the guideway 20 to which 7 is to be guided (see FIG. 6). When the positioning section 25 receives the angular movement operation, the spring-loaded bolt 28 is inserted into the hole 3 of the positioning plate 33.
2, all rollers 7 of the control crank 16 of the same rake wheel 1 or 2 are immobilized on the guideway 19 to yield them during drying (7th (see figure). In order to unlock the positioning member 25 from the grass collecting position, the spring-loaded bolt 28 is inserted into the hole 31 of the positioning plate 33.
Simply pull it out and give the bolt 28 a 180° rotation. Thanks to the engaging protrusion 30, the spring-loaded bolt 2
8 is only then engaged in the hole 32 of the positioning plate 33 corresponding to the drying position. Conversely, in order to unlock the positioning member 25 from the dry position, the spring-loaded bolt 28 is pulled out from the hole 32 of the positioning plate 33.
It is only necessary to give the bolt 28 a rotation of i80o. Thanks to the engagement lug 30, the spring-loaded bolt 28 is only engaged in the hole 31 of the positioning plate 33, which corresponds to the position of the grass collection at that moment. Furthermore, the locking of the positioning member 25 is performed as shown in FIGS. 8 and 9 according to the second embodiment of the present invention.
This can be done with a lock 39 connected to the drive hub 14.

This articulating operation is advantageously carried out by the articulating shaft 15 of the bearing support 13. The lock 39 comprises a hawk 40 which cooperates with two lobes 41, 42 fixed to the positioning member 25 in order to lock the rotation of the positioning member 25. The projections 41, 42 each correspond to one of the working positions of the machine. Thus, when the hawk 40 of the lock 39 is engaged with the protrusion 41, the hawk locating member 25 holds the tool carrying arm 11 in the dry position. Conversely, when the hawk 40 is engaged with the projection 42, the hawk locks while the positioning member 25 holds the tool carrying arm 11 in the grass collecting position. This lock 39 locks the positioning member.
3 returns it to the blocking position. In order to transfer the tool carrying arm 11 from the drying position to the grass collecting position, it is only necessary to pull the hawk 40 out of the protrusion 41 so as to release the positioning section 25.

At that time, "the end 44 of the flat spring 46 surrounding the ball support 26 of the rake wheel 1 or 2 to which the tool carrying arm 11 belongs"
As a result, the lock 39 is held in the locked position. In fact, as soon as the hawk 40 is pulled out, the end 4 of the flat spring 46
4 collides with the protrusion 411 and ``Thus, the hawk 40
is prevented from immediately returning to engagement with the protrusion 41. When the tool fin arm 11 reaches the grass collection position, the flat spring 4 colliding with the protrusion 42 on the side of the hawk 4 river mace
Remove the end 45 of 6 sideways. At this time, the four hawks come into engagement with the protrusion 42 by the action of the spring 43. In order to shift the tool holding arm 11 from the grass collecting position to the drying position, the same operation is performed. .

The ends 44 and 45 of the flat spring 46 are connected to the hawk 401 of the lock 39.
In order to be unscrewed, these ends 44, 45 are pushed out over the projections 41, 42 of the positioning member 25. According to an important feature of the invention, the spacing between the prongs 41, 42 is such that when the hawk 40 changes its working position, the spacing between the protrusions 41, 42
1, 42 is smaller than the overall width of the hawk 40 in order to avoid being drawn in between 1 and 42.

In this embodiment, the protective lid 29 is freed from all operational constraints and is therefore made extremely light and gas-tight. Without being limited to this example, it is also possible to make a machine with, for example, four rake wheels.

In this case, during drying work, the rake wheels rotate two at a time so as to concentrate in the front when viewed in the forward direction,
During grass collection, two can be rotated in the same direction to place the grass either side by side on either side of the machine or stacked in the center.

[Brief explanation of the drawing]

FIG. 1 is a top view of the machine according to the invention in the grass collecting position.
FIG. 2 is a top view of the machine according to the invention in the drying position;
Figure 3 is an enlarged sectional view of the rake wheel at the grass collecting position taken along line A-A in Figure 1, and Figure 4 is an enlarged cross-sectional view of the rake wheel at the drying position taken along line B-B' in Figure 2. Front view, No. 5
FIG.
7 is a partial cross-sectional view of the rake wheel at the grass collection position taken along line C-C in the figure, and FIG. 7 is a partial cross-sectional view of the rake wheel at the drying position taken along line D-D in FIG. 9 is a partial cross-sectional view of the rake wheel in the drying position in the second embodiment of the locking device for the positioning member of the tool carrying arm, and FIG.
FIG. 1, 2: Kake wheel, 3: Cross member, 4: 3-point connection device, 5
: Small wheel, 6, 7: Axis of the rake wheel, 8, 9, 10:
Gear group, 11: Industrial odor carrying arm, 12: Working tool, 13: Bearing support, 14: Drive hub, 15: Link shaft, 16: Control crank, 17: Roller 18: Control cam, 19,2
0: Guideway, 21 Three vertical axes 22: Accommodation part for shell carrying arm, 24: Undulation of guideway for control roller, 25: Positioning member, 26: Bag support for rake wheel, 27: Hanging camphor, 28
; Spring-loaded bolt, 29: Protective lid, 30: Engaging protrusion
31, 32: Engagement hole, 33: Positioning plate, 36, 37,
38: Taxiway undulations, 39: Locks, 40: Hawks, 41,
42: protrusion of positioning member, 43: tassel imitation, 46: flat spring. Fig:IFig:2 Fig:3 Fig:muFig:5 Fig:6 Fig:fuFig:8 Fig:wo

Claims (1)

[Claims] 1 comprising one or several rake wheels, in which the carrying arms of the work tools are arranged in a bearing support arranged outwardly and connected to the drive hub; Each of the carrying arms of the power tool is provided with a control crank having a roller at its rotating end in the direction of the axis of rotation of the rake wheel to which it belongs. In a hay-making machine, the roller 17 moves during operation in a control cam 18 having two guideways 19 and 20;
One of the guideways is connected to the roller 1 of the control crank 16 of the tool carrying arm 11 of the same rake wheel 1 or 2 during the weeding operation.
7, the other one of which is to guide the roller 17 during the drying operation, and the tool carrying arm of the working tool in the bearing support 13 during weeding. When the longitudinal axis 21 housing 22 extends in a plane P parallel to the forward direction of the machine, it includes the axis of rotation 6 or 7 of the rake wheel 1 or 2 to which it belongs. The angle α formed between the plane L and the plane L almost perpendicular to the direction of advance is such that during drying the longitudinal axis 21 accommodating 22 the carrying arm 11 of the working tool in the bearing support 13 is parallel to the direction of advance of the machine. the angle β which, when extending in a plane P, the longitudinal axis forms with a plane L which is almost perpendicular to the forward direction and which contains the axis of rotation 6 or 7 of the rake wheel 1 or 2 to which it belongs; A hay-making machine characterized by being larger.