JP3328585B2 - Mission equipment and farm work equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a mission device and an agricultural work machine which are connected to a power take-off shaft in a work machine and which are rotated and output to work equipment.

[0002]

2. Description of the Related Art Conventionally, as a mission device for an agricultural work machine of this type, for example, an input shaft connected to a power take-out shaft (PTO shaft) of a tractor is provided rotatably on a transmission case. A first output shaft having a left-right direction as an axial direction and a second output shaft on both sides of the transmission case;
Are arranged coaxially and rotatably provided. Further, a first rotating shaft is provided between the input shaft and the first output shaft, the first rotating shaft being rotatable in the transmission case and having a front-rear direction axially driving the first output shaft. A second rotation shaft rotatably provided between the input shaft and the second output shaft, the second rotation shaft having a front-rear direction axially driving the second output shaft for rotation in the transmission case; I have. Further, a first transmission for transmitting the rotation of the input shaft to the transmission case by shifting the rotation of the input shaft to the first rotation shaft.
And a second transmission means for transmitting the rotation of the input shaft to the second rotation shaft at different speeds are known.

[0003]

In the configuration of the transmission, the first and second output shafts for rotating and driving the first output shaft are separated from the both sides of the input shaft. Since the two rotation shafts are respectively provided on both sides of the transmission case, the width of the transmission case as a whole is increased by the first rotation shaft and the second rotation shaft,
For example, when a tilling work body having a cultivating rotary that is rotationally driven by outputs from a first output shaft and a second output shaft is foldable with respect to both sides of the working machine body, respectively, There is a problem that the tilling work bodies on both sides are folded in a state that they are widely opened and separated, and the tilling work bodies on both sides protrude outward from the width of the tractor to which the work machine body is mounted, which may hinder traffic. There is.

Further, the transmission case is provided with a first output shaft and a second output shaft, and a first rotation shaft and a second rotation shaft for respectively driving these output shafts are provided. The first output means and the second speed change means for rotating the rotating shaft of the rotary shaft at different speeds are required. On the other hand, while accuracy is required to rotationally drive the shaft and the second output shaft, there is a problem in that the transmission device as a whole has a large number of components and a complicated configuration.

Further, since the input shaft is provided at a fixed position on the transmission case so that the position cannot be changed, the input shaft cannot correspond to the height position of the PTO shaft of the tractor, and the power transmission shaft is provided on the PTO shaft of the tractor. When connecting the input shaft via the power transmission shaft, there is a problem that the universal joint of the power transmission shaft may be excessively bent and the input shaft may not be smoothly interlocked.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and the width between both side plates of the transmission case can be reduced as a whole, the number of parts is small as a whole, the configuration is simple, and the input shaft is connected to the tractor. It is an object of the present invention to provide a mission device capable of responding to the height position of a PTO shaft and a farming machine capable of folding a tillage working machine having a tillage rotary using the mission device.

[0007]

According to a first aspect of the present invention, there is provided a transmission apparatus having a transmission case having both side plates and an input shaft having a connecting portion rotatably provided in the transmission case and connected to a power take-off shaft. And an output shaft rotatably provided in the transmission case and serving as an output unit for outputting at least one end to a working device; and the same vertical surface having a different height from the input shaft in the transmission case. a rotating shaft provided to be freely rotated parallel to the input shaft located, provided within the transmission case, a shift adjustable transmission means for transmitting said rotary shaft by shifting a rotation of said input shaft , Provided in the mission case ,
A bevel gear mechanism for transmitting the rotation of the rotating shaft to the output shaft.

Then, a connecting portion of the input shaft is connected to the power take-out shaft through, for example, a power transmission shaft, and the input shaft is rotated by the power take-out shaft through the power transmission shaft, whereby the input shaft is connected to the power take-out shaft. The rotation is shifted by the speed change means and transmitted to a rotating shaft provided on the same vertical plane having a height different from that of the input shaft and provided in parallel with the input shaft. When the rotating shaft is rotated, the output shaft is rotated by the rotating shaft via the bevel gear mechanism, and is output to the working equipment from an output portion of at least one end of the output shaft. At this time, the output shaft can be formed by one output shaft rotatably provided as an output portion for outputting at least one end to the work equipment in the transmission case. Rotation is performed with good stability without different rotation speeds at both ends. In addition, the speed of the input shaft is adjusted to a predetermined rotational speed adjusted by the speed change by the speed changing means by adjusting the speed of the speed changing means as necessary according to the type of work equipment, work status, etc., and transmitted to the rotating shaft. The output shaft is rotated by the rotating shaft at a predetermined rotational speed that is shifted according to the type of work equipment, the working situation, and the like via the bevel gear mechanism, and the output shaft of at least one end of the output shaft Output to work equipment.

According to a second aspect of the present invention, in the transmission device of the first aspect, the speed change means is detachably and interchangeably mounted on an input shaft and a rotary shaft and is meshed with each other. It has a plurality of spur gears for selecting a pair of spur gears, and one of the selected two spur gears is axially mounted on one of the input shaft and the rotation shaft, and the other spur gear is selected. A gear is mounted on the other shaft, and has a holding portion for holding an unselected spur gear.

The rotation of the input shaft is changed to a predetermined rotation speed by two selected spur gears having different speed ratios meshed with each other and transmitted to the rotation shaft. Also, by replacing two selected spur gears having different speed ratios meshed with each other, or by selecting other spur gears having different speed ratios and axially attaching them to the input shaft and the rotary shaft, respectively. The rotation of the input shaft is further shifted to a desired rotation speed by the two spur gears and transmitted to the rotation shaft.

According to a third aspect of the present invention, there is provided the mission apparatus according to the second aspect, wherein the transmission case includes a housing for housing the transmission means, a detachable lid for closing an opening surface of the housing, , And the lid has a support shaft on which an unselected spur gear is mounted.

When the rotation of the input shaft is transmitted to the rotating shaft by changing the speed, the cover is removed from the opening on the rear surface of the housing, and the cover is mounted on the support shaft of the cover. The selected non-selected spur gear is taken out of the housing, and the opening at the rear surface of the housing is opened. Further, two selected spur gears having different speed ratios meshed with each other are respectively mounted on the input shaft and the rotating shaft, and the unselected spur gears are mounted on the support shaft of the lid, and the selected spur gears are not selected. By closing the opening surface of the housing portion with this lid in a state where the spur gear is housed in the housing portion, soil or the like is prevented from entering the housing portion, and the transmission means in the housing portion is protected from the soil or the like. .

According to a fourth aspect of the present invention, there is provided the mission device according to the first or second aspect, wherein the input shaft;
The rotation axis is one that can be switched up and down .

If the height position of the input shaft of the transmission device and the power take-out shaft for transmitting power to the input shaft are too different depending on the installation state of the mission device, for example, the position of the power take-off shaft is changed. By changing the position of the input shaft up and down accordingly, the input shaft is arranged at a position where the bending angle of the power transmission shaft connecting the input shaft to the power take-off shaft is reduced.

According to a fifth aspect of the present invention, there is provided a mission device.
The mission device according to any one of 1 to 4,
The output shaft is an output unit that outputs both ends to work equipment.
It is a thing.

According to a sixth aspect of the present invention, there is provided an agricultural work machine, comprising: a work machine main body; a mission device according to claim 5 provided on the work machine main body; A connecting pin provided on the machine body, a power relay shaft rotatably connected to the connecting pin so as to be vertically rotatable, and connected to an output portion of an output shaft of the transmission device, and a rotation of the power relay shaft. A tilling work body having a tilling rotary that is rotationally driven by, and the tilling work body with the connection pin as a center,
And a hydraulic cylinder device that moves to a non-tiling work position that is folded on both sides of the work machine body, respectively.

When performing the tilling work, when the piston rod is extended by operating the hydraulic cylinder device, the tilling work body is moved by the piston rod around the connecting pins provided on the working machine body. Pivoted down,
The tilling work body is moved down to the tilling work position developed in the axial direction of the output shaft of the transmission device of the work machine body, and the cultivation rotary of the tilling work body is coaxially arranged.

Accordingly, the tilling work body is reliably supported by the connecting pin of the work machine body and the hydraulic cylinder device at the cultivation work positions which are respectively developed in the axial direction of the output shaft of the transmission device of the work machine body. A rotary working body configured to cultivate a field over a predetermined width that is larger than the width of a tractor having a power take-out shaft and that protrudes in the left-right direction by the cultivation rotary is described.

Further, the work implement body is mounted on the tractor, and the input shaft of the transmission device is rotated by the power take-off shaft of the tractor, whereby the rotation of the input shaft is transmitted to the rotary shaft. At the same time, the output shaft is rotationally driven by the rotating shaft, and the power relay shafts of the tilling work body are respectively rotated by outputs from the output portions at both ends of the output shaft.

Then, the respective tilling rotaries are rotationally driven by the power relay shafts of the tilling working body, and the fields are sequentially tilled over a predetermined width by the rotary working body constituted by these tilling rotaries. You.

Next, in the non-tilling operation, when the hydraulic cylinder device is operated and its piston rod is contracted, the tilling working body is centered on the connecting pin provided on the working machine body by the piston rod. The tilling rotary of the tilling work body is upwardly rotated from a coaxial position while being respectively rotated upward.

Then, when the piston rod of the hydraulic cylinder device is further contracted, the tilling work body is moved to a non-tilling work position where the tilling working body is folded on both sides of the working machine body by the piston rod.

At this time, the connecting pin of the working machine main body is located on the same vertical plane having a height different from that of the input shaft, and a rotating shaft for rotating the output shaft is provided, so that the width between both side plates is reduced as a whole. The tilling work bodies folded upward around the connecting pins as close as possible to each other via the transmission device by being provided in the axial direction close to the output shaft of the transmission device thus set. The tilling work body is folded into a state within the width of the tractor on which the work machine body is mounted.

Then, the tilling work body is securely supported by the two connecting pins and the hydraulic cylinder device of the work machine main body at the non-tilling work position folded on both sides of the work machine main body, respectively.

Therefore, in a state where the tilling work bodies on both sides are supported at the non-tiling work positions on both sides of the work machine main body, the tilling work bodies on both sides are within the width of the tractor to which the work machine body is mounted. It is prevented that the tilling work body on both sides is folded and protrudes outward from the width of the tractor on which the work machine body is mounted, thereby hindering traffic.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a mission device, which has a mission case 2. The transmission case 2 includes a front plate 3, a rear plate 4 located behind the front plate 3 and formed opposite to the front plate 3, and a rear plate 4 formed behind the rear plate 4. A plurality of screws 8 attach / detach to / from a housing portion 5 for accommodating transmission means to be described later and an opening edge 7 of the opening surface 6 which closes an opening surface 6 formed by opening the rear surface of the housing portion 5. A free lid 9, both side plate portions 10 formed between both side ends of the front side plate portion 3 and the rear side plate portion 4, and are formed integrally with the both side plate portions 10 and communicate with the transmission case 2. Left and right hollow cylinder 11
, And is configured.

The front side plate portion 3 has an upper bearing fitting hole 12 formed in the upper portion so as to communicate with the inside of the transmission case 2,
A lower bearing fitting hole 13 formed at the lower portion thereof so as to communicate with the inside of the transmission case 2;
2 and 13 are each formed in the same shape.

The rear plate portion 4 includes an upper bearing body 15 fitted into an upper bearing fitting hole 14 formed at a position facing the upper bearing fitting hole 12 of the front plate portion 3, and the front plate portion 3. And a lower bearing body 17 fitted in a lower bearing fitting hole 16 formed at a position facing the lower bearing fitting hole 13 of the portion 3. The upper and lower bearing bodies 15, 17 have the same diameter. Each has a shaft insertion hole 18 and is formed.

The lid 9 is provided with an opening edge 7 of the opening surface 6.
An upper support shaft 19 as a holding portion for supporting an unselected spur gear to be described later and projecting toward the shaft insertion hole 18 at the upper portion of the rear plate portion 4 when the rear plate portion 4 is fixed to the rear plate portion 4. And a lower support shaft 20 formed as a holding portion for supporting an unselected spur gear, which will be described later, so as to protrude toward the lower shaft insertion hole 18 of the lower support shaft. It is formed hollow and can be reduced in diameter.

The hollow cylindrical body 11 of the both side plate portions 10 has a bearing body 21 fixed in a substantially middle portion in the left-right direction and a connecting plate 22 integrally fixed to an opening edge thereof. Have been.

Next, the input shaft 23 having the front-rear direction as the axial direction is rotatable in the transmission case 2, that is, by the upper bearing fitting hole 12 of the front plate 3 and the upper bearing 15 of the rear plate 4. Is provided.

At the rear end of the input shaft 23, a rotatably supported shaft 24 is rotatably mounted by being removably inserted into the shaft insertion hole 18 of the upper bearing body 15 of the rear plate 4 and rotatably supported. Shaft support 24
Then, the spline shaft portion 25 protruding into the accommodation portion 5
A shaft-supported portion 27 having a reduced diameter formed on the front side thereof via a diameter-reducing step 26, and an upper bearing fitting hole of the front side plate portion 3 through which the shaft-supported portion 27 is rotatably inserted. A bearing body 28 detachably fitted in the inside 12, and a connecting portion 29 formed at a tip end of the shaft-supported portion 27 projecting forward from the front side plate portion 3, that is, a spline shaft portion 30. , Is configured.

Next, the same vertical surface having a height different from that of the input shaft 23 in the transmission case 2, that is, by the lower bearing fitting hole 13 of the front plate 3 and the lower bearing 17 of the rear plate 4. , A rotation shaft 31 having an axial direction in the front-rear direction is provided rotatably in parallel with the input shaft 23.

The rotating shaft 31 is rotatably supported at its rear end by a rotatably supported shaft portion 32 which is inserted into and removed from the shaft insertion hole 18 of the lower bearing member 17 of the rear plate portion 4 so as to be rotatable. Shaft support 32
Then, the spline shaft portion 33 protruding into the accommodation portion 5
, Each of which has a shaft-supporting portion 34 formed at the front end thereof.
And the front plate portion 3 is rotatably inserted through the shaft support portion 34.
Bearing body 35 detachably fitted in the lower bearing fitting hole 13 of
And a spline shaft formed following the shaft supported portion 34
36, a bevel gear 37 located in the transmission case 2 and spline-fitted to the spline shaft portion 36, and a collar body which slidably fits the rotating shaft 31 and holds the bevel gear 37 in a fixed position. 38.

The input shaft 23 having the bearing body 28 and a cover plate 51 for closing the front surface of the bearing body 28, and the bearing body 28
The transmission case 2 is provided so as to be vertically interchangeable with the rotating shaft 31 having a cover plate 52 for closing the front surface of the bevel gear 37 and the bearing body 35.

Next, an output shaft 39 having a left-right direction as an axial direction and intersecting with the rotation shaft 31 is provided in the transmission case 2 so as to be rotatable at a fixed position. The output shaft
39 is a protruding shaft portion 40 disposed in the hollow cylindrical body 11 on both sides from the both side plate portion 10 and rotatably supported by a bearing body 21 in the hollow cylindrical body 11 on both sides, An output portion 42 formed by spline shaft portions 41 at both ends of a projecting shaft portion 40, and a bevel gear fixed to the output shaft 39 located in the transmission case 2 and meshed with a bevel gear 37 of the rotating shaft 31.
43.

The output shaft 39 is rotatably mounted on a bearing 44 fitted to one of the side plates 10. A bevel gear mechanism 45 that transmits the rotation of the rotating shaft 31 to the output shaft 39 by a bevel gear 37 fitted to the rotating shaft 31 and a bevel gear 43 fixed to the output shaft 39 crossing the rotating shaft 31 is provided. It is configured.

The upper bearing body 15, the lower bearing body 17, and the bearing bodies 21, 28, 35, and 44 are arranged in an inner ring that rotatably supports a shaft portion, and are arranged annularly on the outer peripheral surface of the inner ring. It is formed of a ball bearing having an outer ring fitted through a number of balls and fitted into a fitting portion such as a shaft hole.

Next, in the accommodating portion 5 of the transmission case 2, there is accommodated a speed changing means 46 capable of changing the speed of rotation of the input shaft 23 and transmitting the rotation to the rotating shaft 31.

The transmission means 46 is connected to the input shaft 23 and the rotating shaft.
31. A plurality of spur gears 47, 48, 49, and 50 for selecting as a set two spur gears having different speed ratios which are detachably mounted on the shaft and are meshed with each other. Spur gear
One of the spur gears 47 and 48 is attached to one of the input shaft 23 and the rotating shaft 31, that is, the input shaft 23, and the other spur gear 48 is attached to the other shaft, that is, the rotating shaft 31. Have been.

In addition, two spur gears 49 and 50 which are not selected except for being attached to the input shaft 23 and the rotating shaft 31 are in mesh with each other, and one of the spur gears 49 is located on the upper part of the lid 9. The other spur gear 50 is mounted on the support shaft 19, and the other spur gear 50 is mounted on the support shaft 20 below the lid 9.

The rotary shaft 31 is rotatably disposed in the same vertical plane at a height different from that of the input shaft 23 in parallel with the input shaft 23, and the rotation of the rotary shaft 31 is controlled by the output shaft. By forming the bevel gear mechanism 45 transmitting to 39 by the bevel gears 37 and 43 meshed with each other, the transmission case 2 containing these bevel gears moves the both side plate portions 10 as close as possible to each other, and Are formed in a generally flat shape in plan view with the width of the whole being reduced.

Further, one bevel gear 37 and the other bevel gear 43 constituting the bevel gear mechanism 45 are mounted on a rotating shaft 31 and an output shaft 39 which intersect each other in an orthogonal state, so that the rotating shaft 31 The rotation is transmitted to the output shaft 39 without damaging the gears of the bevel gears 37 and 43. Further, for example, two spur gears 47, 48 of the transmission means 46 having different selected transmission ratios,
That is, since the small-diameter spur gear 47 and the large-diameter spur gear 48 are mounted on the input shaft 23 and the rotary shaft 31 which are positioned vertically and in parallel with each other, the selected gear ratios differ. The rotation of the input shaft 23 is transmitted to the rotary shaft 31 without damaging the teeth of the two large and small spur gears 47 and 48.

Next, reference numeral 53 denotes an agricultural work machine.
Is a work machine body 54, the mission device 1 provided on the work machine body 54, and an output shaft of the mission device 1.
A connecting pin 55 having an axial direction in the front-rear direction provided on both sides of the work machine main body 54 in a position close to the axial direction of 39.
And a tilling working body 56 as working equipment connected to the connecting pin 55 so as to be rotatable in the vertical direction, respectively, and the tilling working body 56 around the connecting pin 55, and an output shaft 39 of the transmission device 1. And a hydraulic cylinder device 57 for moving to a non-tilling operation position which is respectively folded on both sides of the working machine body 54, and a tilling operation position developed in the axial direction.

The work machine main body 54 has a main body frame 58 in which the both side plates 10 of the mission case 2 of the mission device 1 are integrally fixed, and the main body frame 58 is hollow on both sides of the mission case 2. A front and rear mounting plate 59 having both ends integrally fixed to the both side plate portions 10 and both connecting plates 22 while sandwiching the cylindrical body 11 respectively;
A plate-like stopper 60 in the front-rear direction integrally fixed to an upper portion between the inner ends of the front end, and a projecting part integrally protruding upwardly in front of the front and rear of the stopper 60 located on the transmission case 2 side. The front and rear mounting projections 61, the support pieces 62 supporting the front and rear mounting projections 61 on both sides thereof, and the lower and upper pins are integrally fixed to the connecting plates 22, protruded forward, and protruded forward. And a lower arm 64 having 63.

The connecting pins 55 are integrally fixed to the front and rear mounting plates 59 on both sides of the main body frame 58, respectively. A top arm 90 is integrally protruded forward and upward from the upper portion of the transmission case 2, and a connecting portion 91 is provided at a distal end of the top arm 90.

The tilling work body 56 is formed in the shape of a hollow pipe, and is provided with a left-right connecting frame 65 disposed coaxially with the hollow cylindrical body 11 of the transmission case 2. The support frame 68 in the left-right direction fixedly supported by the support protrusion 66 protruded downward and the middle part of the vertical transmission case 67 integrally fixed to the outer end of the connection frame 65 And

The tilling work body 56 includes a vertical bracket 69 fixed to an inner end of the support frame 68.
Tilling rotary 70 rotatably supported between the lower end of the transmission case 67 and the lower end of the transmission case 67;
And a power relay shaft 72 rotatably supported at both ends by bearings 71 provided at both ends of the connection frame 65 and disposed coaxially with the output shaft 39 of the transmission case 2. And a clutch 73 for detachably connecting the inner end of the power relay shaft 72 and the output portions 42 at both ends of the output shaft 39 of the transmission case 2.

The connecting frame 65 is a
A connecting arm 74 which is located at an upper portion on the inner end side of the working arm 65 and is integrally fixed along the connecting frame 65 and toward the main body frame 58 of the work machine main body 54;
And an opposite front and rear mounting piece 75 integrally protruded from an upper portion on the outer end side of the outer side.

The inner end of the connecting arm 74 is pivotally supported by the connecting pin 55 of the front and rear mounting plates 59 of the main body frame 58 so as to be rotatable vertically about the connecting pin 55,
That is, the tillage working machine body 56 having the connecting arm 74 is rotatably supported on the connecting pin 55 as a whole in a vertically rotatable manner.

An arc-shaped cover 76 covering the upper part of the tilling rotary 70 is integrally fixed between the transmission case 67 and the bracket 69 at a position below the support frame 68. At the rear end of the body 76, a leveling body 77 formed of a flat plate is pivotally supported in a vertically rotatable manner,
The terrain body 77 is vertically movably supported by a support rod 78 capable of vertical movement.

The tilling rotary 70 includes a tilling shaft 79 rotatably mounted between a lower end of the bracket 69 and a lower end of the transmission case 67. And a plurality of tilling claws 81 protruding radially from each of the flanges 80.

Further, the clutch 73 is formed at one of the clutch claws 82 spline-fitted to the output portions 42 at both ends of the output shaft 39 of the transmission case 2 and at the inner end of the power relay shaft 72. The other clutch claw 84 is spline-fitted to the spline shaft portion 83 so as to be able to advance and retreat in the axial direction, and is constantly urged toward the one clutch claw 82.

The outer end of the power relay shaft 72 is rotatably projected at the upper end in the transmission case 67, and the outer end of the tilling shaft 79 is rotatable at the lower end in the transmission case 67. The outer end of the tilling shaft 79 is interlockingly connected to the outer end of the power relay shaft 72 via the interlocking medium 85, and is located in the transmission case 67. The rotation of the relay shaft 72 is transmitted to the tilling shaft 79.

The hydraulic cylinder device 57 has a cylinder main body 86 and a piston rod 87 which is extendable and retractable on the cylinder main body 86. The cylinder main body 86 is provided between the mounting projections 61 on both sides of the working machine main body 54. The piston rod 87 is rotatably supported in the vertical direction by a support shaft 88, and the tip end of the piston rod 87 is disposed on both sides of the work machine main body 54 on the connection frame 65 of the tilling work machine body 56 on the both sides. Are supported by a support shaft 89 between front and rear mounting pieces 75 projecting therefrom so as to be rotatable vertically.

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

In accordance with the work situation in the field, the transmission means 46 is, for example, as shown in FIGS.
Of the two spur gears 47, 48 having different speed ratios selected from the spline shaft portion 25 at the rear end of the input shaft 23, is spline-fitted to the spline shaft portion 25 at the rear end of the input shaft 23. The other spur gear 48, which is larger in diameter than the spur gear 47 of the input shaft 23, is spline-fitted to the spline shaft portion 33 at the rear end of the rotary shaft 31 in a state where the spur gear 47 is fitted on the shaft and meshed with the small-diameter spur gear 47. The shaft is attached.

At this time, since the rotating shaft 31 is arranged in parallel with the input shaft 23, the large-diameter spur gear 48 is meshed with the small-diameter spur gear 47 axially mounted on the input shaft 23 and the large-diameter spur gear 48 is rotated. The spline shaft portion 33 at the rear end portion is smoothly spline-fitted and axially mounted. One large diameter spur gear 49 which is not selected is fitted on the support shaft 19 at the upper part of the lid 9 and is mounted on the shaft, and the other large diameter spur gear which is not selected at the lower support shaft 20 of the cover 9 is mounted. The other small-diameter spur gear 50 which is not selected while being engaged with the spur gear 49 is mounted on the shaft.

The lid 9 is brought into contact with the opening edge 7 of the housing 5, and unselected large and small spur gears 49, 50, which are mounted on upper and lower support shafts 19, 20 of the lid 9, are accommodated in the housing 5. The cover 9 is fixed to the opening edge 7 of the housing 5 with a plurality of screws 8 in a state where the housing 5 is housed inside the housing 9.
Is closed.

When the input shaft 23 is rotated, the rotation of the input shaft 23 is reduced by the small-diameter spur gear 47 and the large-diameter spur gear 48 having different speed ratios and transmitted to the rotary shaft 31.
The rotation shaft 31 is set to rotate at a lower speed than the input shaft 23.

Further, the transmission means 46 is replaced with the two small-diameter spur gears 47 and the large-diameter spur gears 48 having the different selected gear ratios, and the spline shaft portion 25 at the rear end of the input shaft 23 is replaced with the spline shaft portion 25. The large-diameter spur gear 48 is spline-fitted and axially fitted, and the small-diameter spur gear 47 is spline-fitted to the spline shaft portion 33 at the rear end of the rotating shaft 31 while meshing with the large-diameter spur gear 48. And a shaft attached.

Also in this case, the rotating shaft 31 is provided in parallel with the input shaft 23 at a different height from the input shaft 23 so that the large-diameter spur gear 48 The spur gear 47 having a small diameter is smoothly spline-fitted onto the spline shaft portion 33 at the rear end of the rotating shaft 31 in a state of meshing with the shaft shaft.

When the input shaft 23 is rotated, the rotation of the input shaft 23 is increased by a large-diameter spur gear 48 and a small-diameter spur gear 47 having different speed ratios and transmitted to the rotary shaft 31.
The rotation shaft 31 is set to rotate at a higher speed than the input shaft 23.

Further, the transmission means 46 includes a small-diameter spur gear 47 (or a large-diameter spur gear 48) which is axially mounted on the input shaft 23 and a rotating shaft.
Large-diameter spur gear 48 (or small-diameter spur gear 47) attached to 31
Are not selected, and the upper and lower support shafts 19, 20 of the lid 9
To each. Then, the upper and lower support shafts 19 of the lid 9,
The large and small spur gears 49 and 50 having different speed ratios are selected as the speed change means 46, and the selected large and small spur gears 49 and 50 having different speed ratios are engaged with the input shaft 23 while meshing with each other. The rotation shaft 31 may be configured to be spline-fitted to the rotation shaft 31 so as to be axially attached.

Also in this case, since the rotating shaft 31 is provided in parallel with the input shaft 23 at a different height from the input shaft 23, the rotating shaft 31 is fixed to the input shaft 23 and has a small diameter with a different speed ratio. The large-diameter spur gear 48 (or the small-diameter spur gear 47) smoothly meshes with the spline shaft portion 33 at the rear end of the rotating shaft 31 while meshing with the spur gear 47 (or the large-diameter spur gear 48). It is attached to the shaft.

When the input shaft 23 is rotated, the rotation of the input shaft 23 is changed to large and small spur gears 49, having different speed ratios.
The speed is reduced or increased at 50 and transmitted to the rotating shaft 31, and the rotating shaft 31 is set to be rotated at a reduced or increased speed than the rotation of the input shaft 23.

Next, the lower pin 63 of the left and right lower arms 64 of the agricultural work machine 53 and the connecting portion 91 of the top arm 90 are rotatably connected to the three-point connecting portion of the suspension mechanism of the tractor, respectively.
The universal joint at one end of the power transmission shaft is connected to the PTO shaft of the tractor by spline fitting, and the universal joint at the other end of the power transmission shaft projects forward of the transmission device 1.
The connecting portions 29 are connected to each other by spline fitting.

At this time, the position of the connecting portion 29 of the input shaft 23 is, for example, too high with respect to the position of the PTO shaft of the tractor, and the bending angle of the universal joint at the other end of the power transmission shaft is too large. If the rotation cannot be performed smoothly, the input shaft 23 and the rotation shaft 31 are pulled out from the transmission case 2, the input shaft 23 and the rotation shaft 31 are exchanged up and down, and the input shaft 23 and the rotation shaft 31 are connected again to the transmission case 2. Rotatably attached to

That is, the housing 5 of the transmission case 2
The lid 9 is removed from the opening edge portion 7 of the motor, and a selected set of, for example, a large and small spur gear 4 is mounted on the input shaft 23 and the rotating shaft 31.
7 and 48 are removed from the input shaft 23 and the rotating shaft 31, respectively.

Further, the cover plate 51 of the input shaft 23 is removed from the front plate 3 of the transmission case 2 and the input shaft 23 is removed.
Is pulled out to the front of the mission case 2, this input shaft
The bearing body 28 is pulled out from the upper bearing fitting hole 12 of the front side plate part 3 at the diameter reducing step part 23 of 23, and the supported shaft part 24 and the spline shaft part 25 of the input shaft 23 are located above the rear side plate part 4. Bearing body
15, the input shaft 23 is pulled out of the transmission case 2 as a whole.

The cover plate 52 of the rotating shaft 31 is removed from the front plate 3 of the transmission case 2 and the rotating shaft 31 is removed.
When the bearing body 35 is pulled out to the front of the transmission case 2, the rotating shaft 31 is pulled out from the bevel gear 37 and the collar body 38, and the supported shaft portion 32 and the spline shaft portion 33 of the rotating shaft 31 are connected to the rear plate 4. The rotary shaft 31 is withdrawn from the lower case 17, so that the rotating shaft 31 is withdrawn from the transmission case 2 with the bevel gear 37 and the collar body 38 remaining in the transmission case 2.

Then, the input shaft 23 having the cover plate 51 and the bearing 28 is moved from the lower bearing fitting hole 13 of the front plate 3 of the transmission case 2 to the shaft insertion hole 18 of the lower bearing 17 of the rear plate 4. When the input shaft 23 is inserted, the supported shaft portion 24 at the rear end of the input shaft 23 is rotatably supported by the shaft insertion hole 18 of the lower bearing body 17, and the spline shaft portion 25 projects into the housing portion 5. Further, the bearing body 28 of the input shaft 23 is inserted into the lower bearing fitting hole 13 of the front side plate portion 3.
And the cover plate 51 of the input shaft 23 is fixed to the opening edge of the lower bearing fitting hole 13 of the front plate 3.

Therefore, the input shaft 23 replaces the rotary shaft 31 and is rotatably supported by the bearing 28 of the lower bearing fitting hole 13 of the front plate 3 and the lower bearing 17 of the rear plate 4. The connecting portion 29 of the input shaft 23 projects forward from the front plate 3.

A rotating shaft having a cover plate 52 and a bearing body 35
When 31 is inserted through the upper bearing fitting hole 12 of the front plate 3 of the transmission case 2 into the bevel gear 37 and the collar body 38 and is inserted through the shaft insertion hole 18 of the upper bearing 15 of the rear plate 4, The shaft-supported portion 32 at the rear end of the shaft 31 is
The spline shaft portion 33 is rotatably supported by the shaft insertion hole 18 and the spline shaft portion 33 projects into the housing portion 5. The bearing body 35 of the rotating shaft 31 is fitted into the upper bearing fitting hole 12 of the front plate portion 3, and the lid plate 52 of the rotating shaft 31 is fitted to the opening edge of the upper bearing fitting hole 12 of the front plate portion 3. To the part.

Therefore, the rotating shaft 31 is replaced with the input shaft 23 and is rotatably supported by the bearing 35 of the upper bearing fitting hole 12 of the front plate 3 and the upper bearing 15 of the rear plate 4. The bevel gear 37 of the rotating shaft 31 is meshed with the bevel gear 43 of the output shaft 39, and the bevel gear 37 of the rotating shaft 31 is
Positioning is performed by the collar body 37 in a state of being meshed with the bevel gear 43 of 39, and the meshing state between the bevel gear 37 of the rotating shaft 31 and the bevel gear 43 of the output shaft 39 is maintained.

Also, a pair of large and small spur gears 47, which are engaged with the spline shaft 33 of the rotary shaft 31 and the spline shaft 25 of the input shaft 23 projecting into the housing 5 of the transmission case 2. The spur gears 49 are spline-fitted to each other and axially attached to each other, and the lid 9 is brought into contact with the opening edge 7 of the housing portion 5 so that spare spur gears 49 supported by the lid 9 are meshed with each other. , 50 are housed in the housing 5.

By attaching the lid 9 to the opening edge 7 of the housing 5 with a plurality of screws 8, the opening 6 of the housing 5 is closed with the lid 9, and The mud and the like are prevented from entering the inside of the gear 5, the rotation of the speed change means 46 is prevented from being hindered by the mud and the like, and the speed change means 46 in the storage unit 5 is protected.

In this manner, the position of the connecting portion 29 of the input shaft 23 is variably adjusted up and down in accordance with the position of the PTO shaft of the tractor, and the connecting portion 29 of the input shaft 23 is connected to the other end of the power transmission shaft. Is installed at a position where the bending angle of the universal joint becomes smaller. Then, the universal joint at the other end of the power transmission shaft is smoothly spline-fitted to the connecting portion 29 of the input shaft 23 with a small bend angle, so that the input shaft can be smoothly interlocked.

Next, when tilling work, when the hydraulic cylinder devices 57 on both sides are operated to extend the respective piston rods 87, the tilling work body 56 is moved by the piston rods 87 to the work machine body 54. Are respectively pivoted down about the connecting pin 55 of FIG.

The tilling work body 56 is a work machine main body.
While being lowered to the tilling work position developed in the axial direction of the output shaft 39 of the transmission device 1 provided at 54,
The tilling shaft 79 of the tilling rotary 70 of the tilling work body 56 is arranged coaxially, and the inner end of the power relay shaft 72 of the tilling work body 56 is connected to the output shaft 39 of the transmission device 1 by the clutch 73. It is connected to the output sections 42 at both ends.

Further, by arranging the tilling shafts 79 of the tilling rotary 70 coaxially,
The inner ends of the 79 are close to each other, and the respective tilling claws 81 projecting radially from the peripheral surface of the flange 80 at the inner ends of the two tilling shafts 79 are close to each other. Then, the respective tilling claws 81 at the inner ends of the two tilling shafts 79 are brought close to the tilling state such that residual tilling does not occur between the inner ends of the two tilling shafts 79 during the tilling operation.

It is to be noted that, by arranging a residual cultivation processing blade or the like for performing residual cultivation between the inner ends of both tilling shafts 79, if necessary, on one of the opposed brackets 69 of the both tilling work bodies 56. The tilling work body 56 is disposed at the tilling work position where it is deployed in both sides of the work machine body 54, that is, in the axial direction of the output shaft 39 of the transmission device 1, and both brackets 69
The remaining tillage processing blades and the like are disposed therebetween, and the tillage between the inner ends of the two tillage shafts 79 is plowed and plowed by the remaining tillage processing blades and the like during the tillage operation.

When the two hydraulic cylinder devices 57 are simultaneously operated when the two tilling working bodies 56 are lowered, the two tilling working bodies 56 are simultaneously deployed in the axial direction of the output shaft 39 of the transmission device 1 to perform the tilling operation. Although it is arranged at the position, the hydraulic cylinder devices 57 on both sides may be sequentially operated one by one.

Therefore, when the two tilling work bodies 56 are lowered to the tilling work position, the connecting pin 55
The tilling work body 56 is securely supported by the hydraulic cylinder devices 57 on both sides in the cultivation work positions that are respectively deployed in the axial direction of the output shaft 39 of the transmission device 1.
A rotary work body 92 configured to cultivate a field over a predetermined width that is greater than the width of the tractor and protrudes in the left-right direction is configured by the 56 tillage rotary 70.

Next, the agricultural machine 53 is mounted on the tractor, and the input shaft 23 of the transmission 1 is rotated by the power take-off shaft of the tractor. The output shaft 39 is transmitted to the rotating shaft 31, and the output shaft 39 is rotationally driven by the rotating shaft 31 via the bevel gear mechanism 45. , The power relay shafts 72 of the tillage working machine bodies 56 are respectively rotated.

Then, the power relay shaft 72 of both tilling work bodies 56
The tilling rotary 70 is driven to rotate via the interlocking medium 85, and the field is sequentially tilled over a predetermined width by the rotary work body 92 constituted by the two tilling rotaries 70 while the cultivation is progressed.

Next, during non-tilling work, the hydraulic cylinder devices 57 on both sides are operated to
When the piston rod 87 is contracted, the tilling work body 56 is lifted and rotated around the connecting pin 55 of the work machine body 54 by these piston rods 87, and the tilling shaft of the tilling rotary 70 of the tilling work body 56 is rotated. 79 is rotated upward from the coaxial position, and the inner end of the power relay shaft 72 of the tilling work body 56 is disengaged from the output portions 42 at both ends of the output shaft 39 of the transmission device 1 by the clutch 73. .

When the piston rods 87 of the hydraulic cylinder devices 57 on both sides are further contracted, the tilling work body 56 is folded by the piston rods 87 on both sides of the work machine body 54, respectively. Moved to position.

At this time, the connecting pin 55 of the working machine body 54 is
The transmission case 2 is provided by providing a rotating shaft 31 for rotating the output shaft 39 located on the same vertical plane having a height different from that of the input shaft 23.
The transmission pin 39 of the work machine main body 54 is provided at a position close to the output shaft 39 of the transmission device 1 which is formed in a flat shape with the width between both side plate portions 10 being small as a whole.
The two tilling working bodies 56, each of which is folded upward from the center 55, are folded so as to be as close as possible to each other with the transmission device 1 interposed therebetween.
Is folded within the width of the tractor to which the work machine body 54 is mounted, that is, within the distance between the outer surfaces of the left and right wheels of the tractor.

The non-tilling cultivator body 56 is folded by the connecting pin 55 of the working machine body 54 and the hydraulic cylinder devices 57 on both sides so that the cultivating working body 56 is brought as close as possible to both sides of the working machine body 54. It is reliably supported in the working position.

Therefore, in a state where the both tilling working bodies 56 are supported at the non-tiling working positions on both sides of the working machine body 54, the both tilling working bodies 56 are folded within the width of the tractor, that is, The tilling work body 56 is folded within the distance between the outer surfaces of the left and right wheels, and
Is not folded out of the width of the tractor to which the tractor is attached, that is, outwardly protruding from the outer surfaces of the left and right wheels of the tractor, thereby preventing traffic from being hindered.

As described above, the transmission device 1 (mission case) is formed so that the width between both side plates 10 is small and flat as a whole. A series of rotary working bodies 92 formed by the cultivating rotary 70 of the two cultivating working bodies 56 are deployed such that the tilling working body 56 is extended in the left-right direction.
On the other hand, in the case of non-tiling work, the two tilling working machine bodies 56 are mounted on the tractor having the working machine body 54 mounted on both sides of the working machine body 54, while the field is sequentially tilled over a predetermined width. Folds securely within the width.

Further, since the both tilling work bodies 56 are symmetrical with respect to the work machine main body 54, the two tilling work bodies 56 are deployed on both sides of the work machine main body 54 during the tilling operation and when the work machine body 54 In both the non-tiling work in which the both tilling work bodies 56 are folded on both sides, the weight balance is good, and the tilling work can be stably performed and can be moved in a stable state on a road or the like.

Further, the transmission device 1 (mission case) uses one output shaft 39 having output portions 42 at both ends and having the left-right direction as the axial direction, so that the output shaft 39 can be easily rotated freely. It can be securely supported, is excellent in strength and transmission efficiency, and has a small number of parts as a whole, which simplifies the configuration.

Further, since the transmission 1 (the transmission case) has the transmission means 46, there is no need to change the rotation speed of the cultivating rotary 70 of the agricultural working machine 53 on the tractor side. By being able to change the rotation speed of the cultivation rotary 70, the rotation speed of the cultivation rotary 70 can be easily adjusted to the appropriate rotation speed in accordance with the cultivation work situation on the agricultural work machine 53 side. The rotation speed of the tilling rotary 70 can be easily adjusted to a proper rotation speed according to the tractor to which the agricultural work machine 53 is mounted, and the agricultural work machine 53 can be mounted on various tractors without using a specific tractor. it can.

For example, the spur gears 49 and 50, for which the transmission means 46 is not selected, are engaged with each other and the upper and lower support shafts of the lid 9 are engaged with each other.
By mounting the shaft on 19 and 20, the spur gears 49 and 50 interfere with each other due to vibration during
49, 50 can be prevented from being damaged.

[0098]

According to the first aspect of the present invention, the input shaft and the output shaft are rotatably provided in the transmission case, and the input shaft and the input shaft have different heights in the transmission case so as to be on the same vertical plane. the position to the rotating shaft for rotating the output shaft in parallel with the input shaft rotatably provided, kill small <br/> of Kude overall width between opposite side plate portions of the transmission case.

Further, since the output shaft can be formed by a single output shaft rotatably provided as an output portion for outputting at least one end to the working equipment, the output shaft may be displaced at the shaft center or at both ends. Rotation can be performed with good stability without different rotation speeds.

Further, an output shaft serving as an output unit for outputting at least one end to the working equipment is rotatably provided in the transmission case, and the output shaft is rotated by the rotating shaft via a bevel gear mechanism. The number of parts as a whole is smaller and the configuration is simpler than that in which output shafts on both sides are respectively rotated via gear mechanisms by rotating shafts arranged in parallel on both sides of the shaft.

Further, since there is provided a speed changing means for changing the speed of the rotation of the input shaft and transmitting the rotation to the rotating shaft, the speed of the speed changing means can be adjusted according to the type of work equipment, work conditions, and the like. The rotation of the input shaft can be transmitted to the rotating shaft by changing the speed of the rotation of the input shaft to a predetermined rotation speed adjusted by the speed changing means,
With this rotating shaft, the output shaft can be rotated through a bevel gear mechanism to a predetermined rotation speed that is shifted according to the type of work equipment, work situation, and the like. Can be output at an appropriate rotation speed to operate the.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the rotation of the input shaft is controlled to a predetermined rotational speed by two selected spur gears having different gear ratios meshed with each other. The speed can be transmitted to the rotating shaft, and the two selected spur gears having different speed ratios meshed with each other can be replaced with each other, or the other two spur gears having different speed ratios can be selected and used as input shafts. By being attached to the rotation shaft, the rotation of the input shaft can be further transmitted to the rotation shaft at a desired rotation speed by the selected two spur gears.

According to the third aspect of the invention, in addition to the effect of the second aspect, the transmission means is accommodated in the accommodation portion formed in the transmission case, and the opening surface of this accommodation portion is closed by the lid. Accordingly, it is possible to reliably prevent, for example, mud or the like from entering the housing portion, and it is possible to reliably protect the transmission means in the housing portion from the mud or the like. Further, since the lid has a support shaft for supporting a spur gear whose transmission means is not selected, the spur gear which is not selected by the support shaft of the lid can be supported in the receiving portion by being mounted in a meshed state. Mutual interference of unselected spur gears can be prevented, and damage to these spur gears can be prevented.

According to the fourth aspect of the present invention, in addition to the effects of the first or second aspect, the input shaft and the rotary shaft can be switched up and down, so that the input shaft is connected to the power take-out shaft. The input shaft can be reliably disposed at a position where the angle of the power take-off shaft becomes small so that the input shaft is smoothly interlocked in accordance with the height position of the power take-off shaft.

According to the sixth aspect of the present invention, when tilling work is performed, the hydraulic cylinder device is operated to extend the piston rod, thereby lowering the tilling work body about the connecting pin to rotate the transmission device. Can be easily moved to the tilling work position deployed in the axial direction of the output shaft, and
Rotary work for cultivating a field over a predetermined width that is larger than the width of a tractor and protrudes in the left-right direction, for example, at the cultivation rotary of the tilling work body can be arranged coaxially with the cultivation rotary of the cultivation work body. Can compose the body.

In the non-tiling operation, the hydraulic cylinder device is operated to contract the piston rod, so that the tilling working body is folded on the both sides of the working machine body around the connecting pin, respectively. Easy to move to position.

At this time, the connecting pin connecting the tilling work body is located on the same vertical plane having a height different from that of the input shaft, and a rotary shaft for rotating the output shaft in parallel with the input shaft is provided. Since the overall width between the plate parts is small, it is provided in the axial direction close to the output shaft of the transmission device, so that both tilling working bodies folded around this connection pin can reach each other with the transmission device in between. It is possible to fold the two tilling work bodies into the width of a tractor on which the work machine body is mounted, for example.

Therefore, in a state where the both tilling working bodies are folded to the non-tilling working positions on both sides of the working machine main body, the two tilling working bodies project outward from the width of the tractor on which the working machine body is mounted, for example. It is possible to reliably prevent traffic from being hindered.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a mission device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a cross-sectional plan view without the input shaft.

FIG. 4 is a vertical sectional side view of the transmission device in a state where the input shaft and the rotation shaft are exchanged up and down.

FIG. 5 is a rear view of a part of the agricultural work machine provided with the mission device.

FIG. 6 is a side view of the agricultural working machine.

FIG. 7 is a rear view showing a state where the tillage working bodies on both sides of the agricultural work machine are folded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mission device 2 Mission case 5 Housing part 6 Opening surface 9 Lid 19, 20 Support shaft 23 as a holding part 23 Input shaft 29 Connecting part 31 Rotating shaft 39 Output shaft 42 Output part 45 Bevel gear mechanism 46 Transmission means 47, 48, 49, 50 Spur gear 54 Work unit body 55 Connecting pin 56 Tilling work body 57 Hydraulic cylinder device 70 Tilling rotary 72 Power relay shaft

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01B 33/08 A01B 71/02 F16H 1/14 F16H 3/16

Claims (6)

(57) [Claims] 1. A transmission case having both side plates , an input shaft rotatably provided in the transmission case, and having a connection portion connected to a power take-off shaft, and rotatably provided in the transmission case , An output shaft having at least one end thereof as an output portion for outputting to the working equipment; and an input shaft located in the same vertical plane having a different height from the input shaft in the transmission case so as to be rotatable in parallel with the input shaft. a rotating shaft provided, provided in the transmission case, a shift adjustable transmission means for transmitting said rotary shaft by shifting a rotation of the input shaft, provided in the transmission case, the rotary shaft A bevel gear mechanism for transmitting rotation to the output shaft. 2. The speed change means has a plurality of spur gears which are detachably mounted on an input shaft and a rotation shaft and which are detachably mounted and meshed with each other to select two spur gears having different speed ratios as a set. ,
One of the two selected spur gears is axially mounted on one of the input shaft and the rotating shaft, the other spur gear is axially mounted on the other shaft, and an unselected spur gear is held. The transmission device according to claim 1, further comprising a holding unit that performs the operation. 3. The transmission case has a housing for accommodating the speed change means, and a detachable lid for closing an opening surface of the housing, wherein the lid is provided with an unselected spur gear on a shaft. The transmission device according to claim 2, further comprising a support shaft that performs the rotation. 4. The transmission device according to claim 1, wherein the input shaft and the rotation shaft are interchangeable up and down . 5. The output shaft outputs both ends to a working device.
5. An output unit according to claim 1, wherein:
A mission device according to any of the preceding claims. 6. A work machine main body; a mission device according to claim 5 provided on the work machine main body; and a work machine main body provided near the axial direction of an output shaft of the mission machine. A connecting pin, a power relay shaft that is rotatably connected to the connecting pin in a vertical direction, and that is connected to an output portion of the output shaft of the transmission device, and that is rotated by the rotation of the power relay shaft. A tilling working body having a cultivating work body having a cultivating work body and a cultivating work body having the connecting pin as a center. And a hydraulic cylinder device for moving to a tilling operation position.