JP2013000021A - Farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a farm working machine having an indestructible power transmission shaft body.SOLUTION: The farm working machine 1 includes: a machine frame 2 connected to a tractor; and a mobile machine frame 11 movable relative to the machine frame 2. The machine frame 2 has a first input shaft-supporting part 7 revolvably supporting a first input shaft 10, while the mobile machine frame 11 has a second input shaft-supporting part 25 revolvably supporting a second input shaft 20. The mobile machine frame 11 is equipped with such a working means 13 as to be put to a forwardly working mode in making a forward work, while being put to a rearwardly working mode in making a rearward work. An axial one end of a power transmission shaft body is connected to the first input shaft 10, while the axial other end thereof is connected to the second input shaft 20. The second input shaft 20 is inclined at a defined tilt angle θ with the horizontal direction.

Description

  The present invention relates to a farm work machine in which a power transmission shaft body is hard to break.

  Conventionally, for example, an agricultural machine described in Patent Document 1 is known.

  This conventional agricultural machine has a first input shaft support portion that rotatably supports the first input shaft, a machine frame connected to the traveling vehicle, and a second input shaft that rotatably supports the second input shaft. A movable machine frame that has a support and is movable relative to the machine frame, a working means that is provided on the movable machine frame and that is in a forward work state during forward work and a reverse work state during reverse work, and an axial direction with respect to the first input shaft A bendable power transmission shaft (joint) having one end connected and the other axial end connected to the second input shaft is provided.

JP 2001-352803 A (FIG. 4)

  However, the conventional agricultural machine has a problem in that since the second input shaft is horizontal, the bending angle of the power transmission shaft body increases and the power transmission shaft body is easily broken.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine with which a power transmission shaft body is hard to break.

  The agricultural machine according to claim 1 has a first input shaft support portion that rotatably supports the first input shaft, and a machine frame coupled to the traveling vehicle and a second input shaft that rotatably supports the second input shaft. A movable machine frame that has two input shaft support parts and is movable relative to the machine frame; and a working means that is provided on the movable machine frame and is in a forward work state during forward work and in a reverse work state during reverse work; A bendable power transmission shaft body having one axial end connected to the first input shaft and the other axial end connected to the second input shaft, wherein the second input shaft is horizontally oriented In contrast, it is inclined at a predetermined inclination angle.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the first input shaft is located along the front-rear direction, and the second input shaft is located at a position lower than the first input shaft. And it is located along the inclination direction of left high right low in the back view when the working means is in the forward working state.

  According to a third aspect of the present invention, in the agricultural machine according to the first or second aspect, the power transmission shaft body has a bendable bending portion at each axial end.

  The agricultural machine according to claim 4 is the agricultural machine according to any one of claims 1 to 3, wherein the power transmission shaft body is positioned in a straight line when viewed from the rear.

  According to the present invention, since the second input shaft is inclined at a predetermined inclination angle with respect to the horizontal direction, the bending angle of the power transmission shaft body is reduced, the power transmission shaft body is not easily broken, and the power transmission shaft body It is possible to improve the durability.

It is a top view at the time of advance work of the agricultural working machine which concerns on one embodiment of this invention. It is a top view at the time of non-working of a farm working machine same as the above. It is a top view at the time of the reverse operation | work of an agricultural working machine same as the above. It is a rear view of the power transmission shaft body at the time of advance work of a farm work machine same as the above. It is a rear view of the power transmission shaft body at the time of reverse operation of the agricultural working machine. It is a rear view of the state which removed the power transmission shaft body same as the above. It is a side view of the state which removed the power transmission shaft body same as the above. It is a top view of a power transmission shaft body and working means same as the above. (A) is a rear view of a power transmission shaft body, and (b) is a side view of the power transmission shaft body.

  An embodiment of the present invention will be described with reference to the drawings.

  1 to 7, reference numeral 1 denotes an agricultural working machine. The agricultural working machine 1 is, for example, a coater (offset working machine) used by being connected to the rear part of a tractor which is a traveling vehicle (not shown).

  The farm work machine 1 is connected to the rear part of the tractor, and moves forward along the vine of the field by the forward traveling of the tractor, while performing an offset work, for example, a cocoon painting work (a cocoon repair work). )do. In addition, as shown in FIG. 3, in the corner of the farm field, the farm work machine 1 is subjected to a padding operation while moving backward along the straw of the farm field by the backward traveling (back traveling) of the tractor. do.

  The farm work machine 1 includes a machine frame 2 that is a fixed machine frame connected to a three-point link unit (work machine lifting device) at the rear of a tractor (not shown).

  The machine frame 2 has a three-point connecting portion 4 connected to a three-point link portion at the rear of the tractor. The three-point connecting portion 4 includes a top mast 5 and a lower arm 6.

  The machine casing 2 has a first input shaft support portion 7 below the central portion in the left-right direction. The first input shaft support portion 7 supports the linear first input shaft 10 in a rotatable manner. The first input shaft 10 is positioned along the front-rear horizontal direction (including substantially the front-rear horizontal direction, that is, for example, including −15 degrees to +5 degrees with respect to the horizontal direction). The front end portion (front end portion) of the first input shaft 10 is connected to the PTO shaft of the tractor via the power transmission means, and the power (rotational force) output from the PTO shaft is input to the first input shaft 10. Is done. The first input shaft support portion 7 can be adjusted to rotate in the vertical direction according to the size of the tractor. The rotation of the first input shaft support portion 7 adjusts the orientation of the first input shaft 10. It is supposed to change.

  The farm work machine 1 includes a movable machine frame 11 that is movable with respect to the machine frame 2, a connecting means 12 that couples the machine frame 2 and the movable machine frame 11, and a working means that is provided on the movable machine frame 11 and performs a drape work 13 and.

  The connecting means 12 has a first rotating arm 16 and a second rotating arm 17. Each rotation arm 16 and 17 is attached to the machine frame 2 so that rotation is possible. A slide arm 15 for adjusting the offset position of the working means 13 in the forward working state is rotatably attached to the machine frame 2.

  The movable machine frame 11 includes a first frame portion 21 to which the respective rotating arms 16 and 17 are rotatably attached, and a second frame portion that is rotatably attached to the first frame portion about a shaft 23 in the vertical direction. The second frame portion 22 is provided with working means 13. The working means 13 can be rotated 180 degrees with respect to the machine casing 2.

  The second frame portion 22 of the movable machine frame 11 has a second input shaft support portion 25 such as a transmission case that does not rotate with respect to the working means 13, as shown in FIGS. The second input shaft support portion 25 supports the linear second input shaft 20 in a rotatable manner. That is, the second input shaft support portion 25 has an inclined surface portion 26 facing obliquely upward, and the second input shaft 20 protrudes obliquely upward from the central portion of the inclined surface portion 26.

  The second input shaft 20 is inclined at a predetermined inclination angle θ with respect to the horizontal direction. Specifically, the second input shaft 20 is located at a position lower than the first input shaft 10 and is positioned along the inclined direction of left high right low in the rear view when the working means 13 is in the forward working state. It is located on the right side of one input shaft 10.

  In other words, the second input shaft 20 has its front end surface (left end surface) 20a facing the first input shaft 10 side in a rear view when the working means 13 is in the forward working state (at the time of the forward working of the agricultural work machine 1). Further, it is inclined at a predetermined inclination angle θ with respect to the horizontal direction (see FIG. 6). Note that the predetermined inclination angle θ here is an angle within a range of 20 degrees to 30 degrees, for example.

  The first input shaft 10 and the second input shaft 20 are connected to each other by a power transmission shaft body (joint) 30 that can be bent at two locations and extend and contract in the axial direction. That is, one axial end of the power transmission shaft 30 is connected to the first input shaft 10 and the other axial end of the power transmission shaft 30 is connected to the second input shaft 20. Power is transmitted from the first input shaft 10 to the second input shaft 20 by 30.

  As shown in FIGS. 4, 5, 8, and the like, the power transmission shaft body 30 has a telescopic shaft portion 31 that can be expanded and contracted in the axial direction on the center side in the axial direction, and a bent portion 32 that can be bent. 33 are provided on both ends in the axial direction. That is, the power transmission shaft 30 includes a bent portion 32 on one end side in the axial direction connected and fixed to the first input shaft 10, a bent portion 33 on the other end side in the axial direction connected and fixed to the second input shaft 20, It is comprised with the expansion-contraction shaft part 31 which connects these both bending parts 32 and 33 mutually.

  Here, as shown in FIG. 8, the telescopic shaft portion 31 includes an outer shaft 35 and an inner shaft 36 that is slidably inserted into the outer shaft 35.

  The bent portion 32 on the first input shaft 10 side, which is one end side in the axial direction, is a first yoke 37, a second yoke 38, a third yoke 39, and a first yoke 37 and a second yoke 38 positioned between the first yoke 37 and the second yoke 38. One spider 41 and a second spider 42 located between the second yoke 38 and the third yoke 39 are provided. A base end portion (rear end portion) of the first input shaft 10 is connected and fixed to the first yoke 37. The end of the inner shaft 36 is connected and fixed to the third yoke 39.

  The bent portion 33 on the second input shaft 20 side that is the other end side in the axial direction is located between the first yoke 47, the second yoke 48, the third yoke 49, and the first yoke 47 and the second yoke 48. A first spider 51 and a second spider 52 located between the second yoke 48 and the third yoke 49 are provided. The front end (left end) of the second input shaft 20 is connected and fixed to the first yoke 47. The end of the outer shaft 35 is connected and fixed to the third yoke 49.

  The first input shaft 10, the power transmission shaft body 30, and the second input shaft 20 rotate synchronously during forward operation and reverse operation, and power is supplied from the second input shaft 20 to the working means 13, and this working means. 13 is activated. The power transmission shaft body 30 is covered with a safety cover 53.

  Further, as shown in FIGS. 4 and 5, the power transmission shaft body 30 is straight (including substantially straight) when viewed backward (back view) when the working means 13 is in the forward working state and the backward working state. It is supposed to be located in.

  The working means 13 is in a forward working state that protrudes from the rear part of the tractor toward one side (right side) during forward work, and performs the smearing work while moving forward based on the forward travel of the tractor. During reverse operation, the reverse operation state that protrudes from the rear part of the tractor toward the other side (left side) becomes the reverse operation state and moves backward based on the reverse travel of the tractor, so that it can be smeared during transportation, etc. At the time of non-working, the storage non-working state located at the rear part of the tractor is brought about.

  In other words, the working means 13 can be selectively switched between the forward working state, the retracted non-working state, and the backward working state by the operator's manual operation. Further, in this agricultural work machine 1, at least the offset work position in the forward work state can be changed. For example, first locking means 56 and second locking means 57 are provided as fixing means for fixing the working means 13 in each state.

  The working means 13 includes a filling body (rotary) 61 that cultivates and raises the soil of the main fence while rotating, and a ridge forming body that forms a new ridge by compacting the filling while rotating behind the filling body 61 in the traveling direction ( Disk) 62 and an upper surface scraping body 63 that scrapes the upper surface of the main fence while rotating in front of the embankment body 61 in the traveling direction. The embankment body 61, the ridge forming body 62, and the upper surface cutting body 63 are rotatably supported by the second frame portion 22 of the movable machine frame 11.

  As shown in FIG. 8, the upper surface cutting body 63 has a rotating shaft 66 that rotates by receiving power from the chain 65, and a plurality of cutting claws 67 attached to the rotating shaft 66.

  The embankment 61 has a rotating shaft 69 that rotates by receiving power from a bevel gear 68 connected to the second input shaft 20, and a plurality of tilling claws 70 attached to the rotating shaft 69.

  The ridge forming body 62 includes a rotation shaft 74 connected to the rotation shaft 69 via a bevel gear 71, a shaft 72 and a spur gear 73, and a ridge forming member 75 attached to the rotation shaft 74. The ridge forming member 75 includes a truncated cone-shaped ridge side surface forming portion 76 and a cylindrical ridge surface forming portion 77.

  Further, as shown in FIG. 1 and the like, the embankment body 61 is covered with a embankment body cover 78, the crease formation body 62 is covered with a crease formation body cover 79, and the upper surface shaving body 63 is covered with the upper surface shaving body cover 80. Covered.

  Note that, when the working means 13 is in the forward working state, the upper face scraping body 63, the embankment body 61, and the ridge forming body 62 are sequentially located from the front to the rear, but when the working means 13 is in the backward working state, the order is reversed.

  Next, the operation and the like of the farm work machine 1 will be described.

  FIG. 1 shows a state in which the working means 13 is set and fixed in the forward working state.

  In this state, when the tractor travels forward, the work means 13 moves in the advancing direction (forward) and performs the smearing operation.

  That is, the power from the tractor side is transmitted to the working means 13 by the first input shaft 10, the power transmission shaft body 30 and the second input shaft 20, and as a result, the upper surface of the main shaft is scraped by the upper surface scraping body 63, The soil of the Marshal is raised by the embankment body 61, and this embankment is compacted by the culvert formation body 62 to form a new casket.

  Then, when the padding work proceeds and reaches the corner of the field, the working means 13 is set and fixed in the reverse working state shown in FIG. 3 through the storage non-working state shown in FIG.

  In this state, when the tractor travels backward (backward traveling), the work means 13 performs the smearing operation while moving in the traveling direction (rearward). That is, the power from the tractor side is transmitted to the working means 13 by the first input shaft 10, the power transmission shaft body 30 and the second input shaft 20 as in the forward operation, and as a result, the upper surface scraping body 63 generates The embankment 61 is crushed by the embankment 61, and the embankment is compacted by the crease former 62 to form new culms. In this way, it is possible to perform the glazing operation up to the edge of the heel.

  And according to the agricultural machine 1, since the 2nd input shaft 20 inclines with the predetermined inclination angle (theta) with respect to the horizontal direction, it is possible to make the bending angle of the power transmission shaft body 30 close to the minimum. The bending angle of the power transmission shaft 30 is reduced, the power transmission shaft 30 is not easily broken, and the durability of the power transmission shaft 30 can be improved.

  That is, as apparent from FIGS. 9A and 9B, the bending angle A (<A ′) of the bent portion 33 of the power transmission shaft body 30 is larger than when the second input shaft 20 is horizontal. At the same time, the bending angle B (<B ′) of the bent portion 32 of the power transmission shaft 30 is reduced. As a result, the power transmission shaft body 30 is less likely to be damaged due to an impact or the like, the life of the power transmission shaft body 30 can be extended, and the effect of preventing uneven speed can be obtained. Furthermore, for example, compared to a configuration in which a mission case that supports the second input shaft 20 is rotatably provided, the configuration can be simplified, and the weight can be reduced and the manufacturing cost can be reduced.

  Further, since the power transmission shaft body 30 has a small bending angle and is positioned in a straight line in a rear view when the working means 13 is in a working state, the durability of the power transmission shaft body 30 can be further improved. .

  In addition, the agricultural working machine 1 is not limited to the plastering machine that performs the plastering work as the offset work, and may be, for example, a digging machine that performs the grooving work.

DESCRIPTION OF SYMBOLS 1 Farm machine 2 Machine frame 7 1st input shaft support part
10 1st input shaft
11 Movable machine frame
13 Working means
20 2nd input shaft
25 Second input shaft support
30 Power transmission shaft
32, 33 Bent part θ Inclination angle

Claims (4)

A machine frame having a first input shaft support portion rotatably supporting the first input shaft and coupled to the traveling vehicle;
A movable machine frame having a second input shaft support part rotatably supporting the second input shaft and movable relative to the machine frame;
Working means provided in this movable machine frame, which is in a forward work state during forward work, and in a reverse work state during reverse work;
A bendable power transmission shaft body having one axial end connected to the first input shaft and the other axial end connected to the second input shaft;
The agricultural machine according to claim 2, wherein the second input shaft is inclined at a predetermined inclination angle with respect to a horizontal direction. The first input shaft is located along the front-rear direction,
The second input shaft is positioned at a position lower than the first input shaft, and is positioned along an inclination direction of left high right low when viewed from the rear when the working means is in a forward working state. Item 1. Agricultural machine according to item 1. The farm work machine according to claim 1 or 2, wherein the power transmission shaft body has bendable bending portions on both ends in the axial direction. The agricultural machine according to any one of claims 1 to 3, wherein the power transmission shaft body is positioned in a straight line when viewed from the rear.

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