JPH0665241B2 - Agricultural work machine coupling device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for an agricultural working machine, and particularly to connecting an agricultural working machine that is run in parallel or pushed by a tractor to perform a predetermined work. Regarding the device.

[Prior Art] An agricultural working machine that is connected to a rear portion of a tractor and travels with its working portion facing a work target includes, for example, a feed harvester (corn harvester or the like). As a configuration for connecting such a working machine, there is a "harvester structure" (Japanese Patent Laid-Open No. 59-78617) previously proposed by the present applicant.

As shown in FIG. 6 and FIG. 7, this harvester 41 has a row crop portion 2 that projects toward the object to be cut such as a dent cone D, and the opposite side is at the rear of the tractor T. It is designed to be connected.

When the tractor shown in FIG. 6 is retracted, the frame 42 provided between the harvester 41 and the harvester 41 is folded, and the end portion of the frame 42 is locked by the fixing pin 43 so that the harvester 41 is positioned in series and pushed. In addition, in order to operate the row crop portion 2, the PT0 shaft 44 of the tractor T is sequentially arranged from the first free transmission shaft 4
5, the first mission 51, the second universal transmission shaft 46, the second mission 47, etc. are used to transmit the rotational driving force. Of these, the second mission 47 that relays the transmission along the frame 42 is provided on the frame 42 on the folded side and has input shafts 48 and 49 that are formed in opposite directions to each other.

At the time of forward movement shown in FIG. 7, the frame 42 is rotated 180 degrees about a vertical axis 50 provided in the middle thereof to be in an extended state and is positioned in parallel with the tractor T. Also, the second universal transmission shaft 46 to be input to the second mission 47 is connected to the input shaft 49 for parallel running.
Connect to.

By switching the connection posture of the harvester 41 in this manner, it is possible to perform the work when the tractor T is traveling backwards (entering in the field) (division work) and the forward traveling normal work.

[Problems to be Solved by the Invention] By the way, in the above attitude switching, for example, the procedure for changing from the serial state of FIG. 6 to the parallel running state of FIG. 7 is as follows.

The second universal transmission shaft 46 is disengaged from the one input shaft 48 of the second mission 47.

 The fixing pin 43 is pulled out from the end of the frame 42.

 Rotate the harvester 41.

The fixing pin 43 is inserted into the vertical shaft 50 side to lock the frame 42 in the extended position.

The second universal transmission shaft 46 is connected to another input shaft 49 of the second mission 47.

Of these operations, replacement of the second universal transmission shaft 46 is
This is because the positional relationship between the input side and the output side with respect to the second mission 47 is changed from the state where they are aligned on the same side to the state where they face each other and whose rotation direction changes. This work
Among the series of work, it is a particularly troublesome work that requires time and labor, and there is a problem that it puts a heavy burden on the worker, which has been a problem to be solved.

Here, the present invention was devised to provide a coupling device that does not require replacement of the means for transmitting driving force when changing the posture.

[Means for Solving the Problems] In the present invention, a rear portion of a tractor is connected to a side opposite to an actuating portion to transmit a rotational driving force from the tractor, and the tractor is moved in parallel or in series according to forward / backward movement. It is an improved device for connecting an agricultural work machine that is pushed by a certain work and has an engaging part for connecting to one of a pair of lower links mounted on the rear part of the tractor. A tow frame, a connecting frame that has an engaging part for connecting to the other lower link, a mission connected to the PTO shaft of the tractor that fixes the tow frame and the connecting frame to the left and right, and a connecting frame that connects to the mission. A horizontal output shaft extending through the inside to the extension end, a vertical output shaft provided along the vertical axis at the extension end of the connecting frame, and A revolving frame that is provided on the opposite side and is pivotally supported around the above-mentioned vertical axis at the extended end of the connecting frame, and a vertical axis that transmits the rotational driving force of the tractor that is transmitted to the vertical output shaft by the horizontal output shaft. The driving gear is provided with a driving gear that transmits to the surroundings and a driven gear that is movably meshed with the driving gear in the circumferential direction to transmit the rotational driving force to the working machine.

The main driving gear is preferably formed by a bevel gear that meshes with the driven gear.

Further, the revolving frame may have a revolving stop means that engages with the extended end portion of the connecting frame at a predetermined relative position in order to keep the working machines in parallel or in series.

This turning stop means can be configured to have a locking pin and a driving means for remotely operating the locking pin.

[Operation] With the above configuration, when the tractor moves forward to perform work, the connecting frame moves the swing frame around a vertical axis to connect the tractor and the working machine in a parallel running state. The vertical output shaft transmits the rotational driving force to the work machine via the driven gear. When switching to the work posture for retracting the tractor, the swing frame is swiveled so as to overlap the connecting frame, and the working machine is positioned in series. At this time, the driven gear moves around the vertical axis while being meshed with the driving gear. The rotational driving force is transmitted as in the parallel running state.

When the main driving gear is formed of a bevel gear, the rotational driving force is smoothly transmitted to the driven gear by the bevel gear.

When the turning stop means is provided, the turning frame reliably positions the work machine in a predetermined posture.

When the turning stop means is constituted by the locking pin and the driving means, the posture change can be operated by an operator or the like who is on the tractor.

EXAMPLES Examples of the present invention will be described below with reference to the accompanying drawings.
The same components as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows a first embodiment of a connecting device for an agricultural work machine according to the present invention, and shows a parallel running state when the work machine 1 is applied to a corn harvester.

The corn harvester has a row crop section 2, which is an operating section, a conveyance section 3, a cutting blow top 4, a traveling wheel 5, a chute 6, etc., and cuts the dent cone D cut by the row crop section 2 and then follows the chute 6. It is blown up and loaded onto the trailer 7 pulled by the tractor T.

In order to connect the cone harvester to the tractor T, the connection frame 9 is supported by the lower link 8 at the rear of the tractor T, and is pivotally supported around an axis 11 perpendicular to the extended end 10 of the connection frame 9. And a swivel frame 12 are provided. Further, in order to transmit the rotational driving force from the tractor T to the cone harvester, a vertical output shaft 14 having a driving gear 13 and a driven gear mechanism 15 meshed with the driving gear 13 are provided.

The connecting frame 9 is provided across the forward traveling direction A so that its extended end 10 is located on the side of the tractor T, and is attached to the towing frame 16 for towing the trailer 7. . The traction frame 16 is provided with a first mission 25 which is fixed to the left and right and is connected to the PTO shaft 44 of the tractor T via a universal transmission shaft 45. Swivel frame 12
Is provided on the side opposite to the row crop portion 2 of the corn harvester, and is positioned so as not to interfere with the corn harvester when the corn harvester is pivotally moved so as to overlap with the coupling frame 9.

The tow frame 16 is provided with an engaging portion for connecting to one of the pair of lower links 8, and the connecting frame 9 is provided with an engaging portion for connecting to the other lower link 8.

The driven gear mechanism 15 is provided at an end portion of the revolving frame 12 on the pivot side, and is provided on the cutting and blowing section 4 and the conveying section 3, respectively.
The rotational driving force is transmitted via a third transmission 19, a third universal transmission shaft 18, and a third universal transmission shaft 20 connected to the belt 17.

As shown in FIG. 3, the vertical output shaft 14 is connected to the connecting frame 9
Is rotatably provided along a vertical axis 11 in a vertical housing 21 supported by the extending end portion 10. Bevel gears are fixed to the upper and lower ends of the vertical output shaft 14,
The upper end bevel gear 22, which is the main driving gear 13, is connected to the horizontal input shaft 23 forming the driven gear mechanism 15, and the lower end bevel gear 24 is connected to the horizontal output shaft 26, which is connected to the first mission 25. Meshed through 37.
That is, the vertical output shaft 14 transmits the rotational driving force around the shaft 11 perpendicular to the extending end 10 of the connecting frame 9.

The horizontal output shaft 26 is formed along the inner side of the connecting frame 9 having a tubular shape, and is rotatably supported at its end.

The vertical housing 21 is divided into upper and lower shafts that are perpendicular to each other.
It is formed so as to be slidable around 11 and partially overlapped with each other. Therefore, the vertical output shaft 14 has its upper and lower ends rotatably supported by the respective housings 27, 28.

The lower housing 28 is bolted to and integrally fixed to the connecting frame 9, and the upper housing 27 is bolted to a mission case 29 that rotatably supports and surrounds the horizontal input shaft 23. . That is, the revolving frame 12 is pivotally supported by the connecting frame 9 via the vertical housing 21 and the mission case 29.

The mission case 29 includes a horizontal input shaft 23 and a vertical shaft.
A gear train (not shown) that meshes with the radial direction 11 is formed so as to surround the gear train, and is connected to the revolving frame 12 midway.

Further, in the present embodiment, the vertical housing 21 is provided with a turning stop means 30 for locking the connecting frame 9 and the turning frame 12 at a predetermined relative position. The turning stop means 30 includes a locking pin 31 that is vertically movable in the lower housing 28, a compression spring 32 that urges the locking pin 31 in the retracting direction, and the locking pin 31 moves in the retracting direction. It is composed of a drive means 91 for driving the hydraulic hose 33 and a hydraulic hose 33. The locking pin 31 has an overhanging portion 34 formed on the side opposite to the connecting frame 9.
It is provided in. On the other hand, in the upper housing 27, a collar portion 35 that is superposed on the overhanging portion 34 is formed so as to sandwich the vertical shaft 11, and each has a locking hole 36. These locking holes 36 are inserted into the locking pins 31 when the swivel frame 12 is extended in the same direction as the connecting frame 9 and at a position where they are superposed, and the upper housing 27 is rotated. It is designed to prevent The drive means 91 is a switching valve.
By providing 92 near the driver's cab of the tractor T and appropriately guiding the hydraulic pressure from the known hydraulic power source 93 provided in the tractor T,
An operator can remotely control the appearance of the locking pin 31.

Next, the operation of the first embodiment will be described.

In the normal working state shown in FIG. 1, the rotational driving force is transmitted to the vertical output shaft 14 along the connecting frame 9 by the horizontal output shaft 26, and further comprises the horizontal input shaft 23 and the gear train. It is transmitted to the working machine 1 via the driven gear mechanism 15 thus operated to perform a predetermined operation.

When the working machine 1 is placed in the posture for the split work as shown in FIG. 2, first, the driving means 91 locking pin 31 is retracted into the lower housing 28 so that the swivel frame 12 and the connecting frame 9 are connected to each other. Unlock the. Next, the work implement 1 is turned about the vertical axis 11 by appropriately moving the tractor T or the like. At this time, the horizontal input shaft 23 moves in the circumferential direction while meshing with the upper end bevel gear 22 of the vertical output shaft 14.
That is, the vertical axis 11 is substantially a pivot axis. When the revolving frame 12 overlaps with the connecting frame 9 and the working machine 1 is placed in series with the tractor T, the locking pin 31 is retracted and inserted into the locking hole 36 on the opposite side to that during parallel running, and the turning is stopped. Let
Then, the rotational driving force is transmitted in the same manner as during parallel running, and the working machine 1 pushed by the rearward traveling of the tractor T (shown by the arrow B) performs a predetermined work.

In this way, even if the connection posture of the work implement 1 is changed, the rotation directions of the shafts 26, 14, 23 that transmit the rotational driving force do not change, so it is necessary to change the transmission path such as replacing the transmission shaft. Without doing so, the burden on the operator is greatly reduced.

Further, since the turning frame 12 is locked by the turning stopping means 30 which can be remotely operated, it is not necessary for the worker to get on and off during the change of the connecting posture, and the working efficiency is improved. Further, since the horizontal output shaft 26 formed in the connecting frame 9 is provided in place of the second universal transmission shaft 46, the joint portion is not exposed and the safety of the connecting device is improved.

The gear train of the driven gear mechanism 15, the belt 17, the transmission shafts 18, 2
The 0th and third missions 19 and the like are formed according to the input mechanism of the working machine, and are not limited to the illustrated examples.

Next, a second embodiment of the present invention will be described.

As shown in FIG. 4, in this embodiment, the vertical output shaft
71 is a bevel gear that has an upper and lower meshing surface and is long in the axial direction.
It is formed as an axial center portion of 72. That is, the driving gear 13 is integrally formed, and is meshed with the bevel gear 37 of the horizontal output shaft 26 and the bevel gear 38 of the horizontal input shaft 23, which are formed in the same manner as in the first embodiment, in the vertical direction. .

The bevel gear 72 penetrates a vertical axis 73 provided along the vertical axis 11 and is rotatably supported by the vertical axis 73.
The vertical axis 73 is fixed to the lower housing 75 via bolts 76, and the upper housing 78 is pivotally supported via a radial bearing 77, of the housing 74 formed in substantially the same manner as in the first embodiment. ing. In other words, the upper housing
78 turns substantially with the vertical axis 73 as the turning axis.

Further, in the present embodiment, the revolving frame 79 of the working machine 1
Are directly fixed to the upper housing 78, and avoid interference with the connecting frame 9 in the vertical direction in the serial state.

The other configurations and operations are similar to those of the first embodiment, and therefore, the same reference numerals are given and the description thereof is omitted.

In the second embodiment, since the bearing for swiveling is formed separately from the bearing 79 of the vertical output shaft 71, it becomes robust against swiveling and the housing 74 for guiding swiveling is provided.
You can easily overlap the parts. Further, since the horizontal output shaft 26 and the horizontal input shaft 23 are connected at the shortest distance, the rotation transmission is stable.

The bevel gear 72 may be a pair of bevel gears having the same shape as in the first embodiment, and may be configured to be vertically separated. Further, the vertical axis 73 may be fixed to the upper housing 78. In this case, at the time of turning movement, the vertical axis 73 also rotates around the vertical axis 11.

Further, the locking pin and the driving means shown in FIG. 3 are not limited to the examples shown in the drawings, and for example, the locking pin 82 provided with the electric cylinder 81 as shown in FIG. It may be configured by a switch box 84 that is driven by a power source 83 that is installed and connected. In this case, it is conceivable that the locking pin 82 is formed as a separate body supported by the lower housing 28.

In the present embodiment, the description has been made on the connection of the corn harvester, but the present invention is also applied to a reaper or a harvester (for example, a grass reaper) which is arranged and operates on the side of the tractor. It contributes to the realization of work.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

Pivot the swivel frame around the vertical axis of the connecting frame,
Since a vertical output shaft that transmits rotational driving force around this shaft and a driven gear that can move in the circumferential direction are provided, work efficiency when changing the connecting attitude is eliminated without the need to replace the conventional free transmission shaft. Improvement and labor saving are achieved.

In a coupling device in which a driving gear composed of a bevel gear is attached to a vertical output shaft, a rotary driving force can be smoothly and robustly transmitted, and versatility is high.

In the coupling device in which the turning stop means is provided on the turning frame, the working machine can be reliably positioned in a predetermined posture, and the work efficiency can be improved. Further, the turning stop means is constituted by the locking pin and the driving means. In this case, the posture can be changed more smoothly by the remote control.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a connecting device for an agricultural working machine according to the present invention, FIG. 2 is a plan view showing another connecting posture of FIG. 1, and FIG. 1 is a longitudinal sectional view showing an essential part, FIG. 4 is a longitudinal sectional view showing an essential part of a second embodiment of the present invention, and FIG. 5 is a part showing another embodiment of FIG. A sectional view, FIG. 6 is a plan view showing a conventional connecting device, and FIG. 7 is a plan view showing another connecting posture of FIG. In the figure, 9 is a connecting frame, 11 is a vertical shaft, 12 is a revolving frame, 13 is a main driving gear, 14 is a vertical output shaft, 15 is a driven gear mechanism, and 38 is a driven gear.

Claims (4)

[Claims] 1. A tractor has a rear portion connected to an opposite side of an operating portion to transmit a rotational driving force from the tractor, and the tractor is moved in parallel or pushed in series in accordance with forward and backward movements of the tractor to perform a predetermined work. In a device for connecting an agricultural working machine to perform, a traction frame having an engaging part for connecting to one of a pair of lower links mounted on the rear part of the tractor, and connecting to the other lower link A connecting frame having an engaging portion, a mission connected to the PTO shaft of a tractor by fixing the towing frame and the connecting frame to the left and right, and an extension end of the connecting frame connected to the mission and penetrating through the connecting frame. And a vertical output shaft provided along the vertical axis at the extending end of the connecting frame, and provided on the side opposite to the working part of the working machine. And a revolving frame pivotally supported around the vertical axis at the extending end of the connecting frame, and the rotational drive force of the tractor transmitted by the horizontal output shaft provided on the vertical output shaft about the vertical axis. And a driven gear for rotatably meshing the driving gear in the circumferential direction of the driving gear to transmit the rotational driving force to the working machine. 2. The connecting device for an agricultural working machine according to claim 1, wherein the main driving gear is formed by a bevel gear meshed with the driven gear. 3. The swivel frame further comprises swivel stop means for engaging the extended end of the connecting frame at a predetermined relative position in order to hold the working machine in the parallel running or in-line state. Or the connection device of the agricultural working machine as described in 2. 4. The turning stop means includes a locking pin and a driving means for remotely operating the locking pin.
A coupling device for an agricultural work machine according to 1.