JP3426929B2 - Weeder weeder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeding device for a cutting machine such as a cutting and binding machine for weeding a cutting culm to be cut and an uncut ground-side planted culm. The present invention relates to a device provided with a crank arm for making

[0002]

2. Description of the Related Art In the weeding device of this type of reaper, the stalks that swing are used to shunt the grain culm to be harvested and the unplanted grain stalks on the uncut ground side, so that the grain stalks are shaken. It has the advantage of being able to efficiently loosen the entanglement of the grain culms and being superior in the weeding performance as compared with the fixed type in which the weeding rod is not rocked.

However, when considering the cutting conditions, some grain culms are easily shredded. In such grain culms, if the weeding rod is swung to divide the grain, weeding can be done, but Shattering is likely to occur due to the shaking force applied from the rod. In addition, when the grain culm is upright, it may be possible to weed with the fixed sward rod even if the shunt rod is not swayed. When weeding by swinging the rod, shedding is likely to occur. In this way, when performing the weeding, it is required to perform swinging weeding by swinging the weeding rod and fixed weeding by fixing the weeding rod.

Therefore, conventionally, a clutch for interrupting power transmission is provided in the power transmission system to the crank arm, and the clutch is engaged to drive the crank arm to reveal the swing weeding state and disengage the clutch. Therefore, the crank arm is stopped so that the fixed weeding state is revealed.

[0005]

However, in the case of the above-mentioned conventional technique, since a clutch is required, the power transmission system to the crank arm becomes complicated and assembly workability is deteriorated, and the cost is increased. I was invited.

An object of the present invention is to make it possible to reveal a swing shunting state and a fixed shunting state without providing a clutch.

[0007]

The features, functions and effects of the first invention according to claim 1 are as follows.

[Features] A weeding device for a reaper, which is provided with a crank arm for swinging a weeding rod, wherein the eccentric position of the crank arm is provided.
At each of the rotation axis center position, a pivotal connection part with the branch rod is provided.
The eccentric position and the pivot connection
The point is that it is configured so that it can be freely replaced with a branch rod .

[Operation] According to the first aspect of the present invention, the swinging rod is pivotally supported at an eccentric position in the crank arm so as to swing the splitting rod along with the rotation of the crank arm. Separately from the connecting portion, by forming a pivotal connecting portion with the branch rod at the rotary shaft center position of the crank arm, and connecting the branch rod to the pivot support connecting portion formed at the rotary shaft core position, Since the shunt rod is not rocked regardless of the rotation of the crank arm, the crank arm can be rotated by simply replacing the shunt rod without providing a clutch in the power transmission system to the crank arm. With this, it is possible to reveal a swinging weeding state in which the weeding rod is swung, and a fixed weeding state in which the weeding rod is fixed without swinging regardless of the rotation of the crank arm.

[Effect] Therefore, according to the first aspect of the present invention, the swing swaying state and the fixed state are fixed without causing the structure of the power transmission system to the crank arm to be complicated, the assembling workability to be lowered, and the cost to be increased. I was able to show the state of weeding and respond to working conditions.

Features, operations, and features of the second invention according to claim 2
The effects are as follows.

[Characteristics] In the characteristics of the first invention,
In the crank arm, a pivotal connection portion with the weed rod is formed at each of a plurality of positions having different distances from the rotation axis center position.

[Operation] According to the second aspect of the present invention, the plurality of pivot support connecting portions formed on the crank arm are connected to the respective pivot support connecting portions by making the distances from the rotation axis center position different from each other. Since the swing amplitude according to the rotation of the crank arm of the grass rod is made different, it is possible to perform a plurality of swing weeding with different swinging forces acting on the grain stems.

[Effect] Therefore, according to the second aspect of the present invention, by selecting the pivotal support portion to be used based on the state of the grain culm, such as the state of lodging of the grain culm, the degree of entanglement, and the degree of wetting of the grain culm, Suitable swing weeding can be performed according to the state.

Features, operations, and features of the third invention according to claim 3
The effects are as follows.

[Characteristics] In the features of the first invention and the second invention, the drive shaft of the crank arm is provided with an arm mounting shaft on the lower side of the power transmission to which the crank arm is mounted, and a power transmission upper hand installed in a power transmission case. The arm mounting shaft is configured to be detachable from the transmission case, and the end of the arm mounting shaft is prevented from rotating when the arm mounting shaft is mounted on the transmission case. A coupling is provided for inserting and interlocking with the base end shaft, and for detaching the arm mounting shaft when the arm mounting shaft is detached from the transmission case.

[Operation] When only fixed weeding is performed, the weeding device may be required to have an armless specification without a crank arm in terms of cost. In such a case, for example, a drive shaft having a crank arm and a drive shaft not having a crank arm are prepared as drive shafts, and when the swing specification is provided with the crank arm, the drive shaft having the crank arm is transmitted. On the other hand, when it is built in a case and, on the other hand, the armless specification without a crank arm is adopted, it is possible to cope with the specification change by incorporating a drive shaft without a crank arm in a transmission case. However, in this case, when changing the specifications after assembling, a large-scale change work such as replacing the entire drive shaft is required. In addition, when changing the specification from armless specifications to swing specifications, the cost will be reduced due to the synergy of having to newly prepare a drive shaft equipped with a crank arm and wasting a drive shaft not equipped with a crank arm. It was expensive.

On the other hand, according to the third invention,
The drive shaft of the crank arm is divided into an arm mounting shaft and a base end shaft, a coupling is provided, and the arm mounting shaft is attached to and detached from the transmission case. Since swing specifications and armless specifications without crank arms are revealed, when changing the specifications after assembly, it is only necessary to attach / detach the arm mounting shaft to / from the transmission case.

Moreover, when the specification is changed from the armless specification to the swing specification, it is only necessary to prepare the arm mounting shaft, and the base end shaft can be used as it is, so that the cost required for the specification change is low.

[Effect] Therefore, according to the third aspect of the present invention, the specification change between the armless specification and the swing specification can be performed with good workability, and the specification change from the armless specification to the swing specification can be performed at low cost. It was

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 and 2, a walk-behind two-row mowing binding machine, which is an example of a mowing machine, is provided at a front portion of a body frame 2 having a pair of left and right traveling wheels 1. The cutting and binding part A is connected, and a steering handle H extending rearward is connected to the machine body frame 2.

The traveling wheel 1 is supported by a mission case M connected to the body frame 2 via a chain case C, and an engine E is interlocked with the mission case M. That is, the power of the engine E is transmitted to the traveling wheels 1 via the transmission mechanism in the transmission case M and the transmission chain in the chain case C.

As shown in FIG. 3, the cutting and bundling section A includes a cutting frame B connected to the body frame 2, a weeding tool 3, a grain culm to be trimmed, and an uncut ground-side planted grain culm. Swing-type weed bar 4A that oscillates and weeds in a state of entwining the two, a fixed weed bar 4B that pushes unplanted grain side planted grain culms to the uncut land side, and a weeded plant Left and right raising devices 5 that cause standing culms, a clipper-type cutting device 6 that cuts the roots of the planted culms that have been raised, and a rotary type that scrapes planted culms and cut culms backward. Left and right pair of packers 7
And a leaning guide plate 8 for leaning and supporting the harvested culm in a backward leaning posture, and a locking for transporting the base of the leaned culm supported on the opposite side of the weeding rod 4. The stock carrier transport chain 9 with the protrusion 9a, the tip transport belt 10 with a locking protrusion that locks and transports the tip end side of the leaning culm supported by leaning to the side opposite to the weeding rod 4, and the harvested harvester It is configured by assembling a bundling device 11 that bunds the grain culms by a fixed amount and discharges the culms to the left and right.

The swinging type weeding rod 4A is arranged in a tilted posture in which the front end is positioned near the ground, and is attached to the weeding tool 3 so as to be vertically swingable about a left-right axis P1 at the front end. It is installed.

From the mission case M to the cutting and binding section A
As shown in FIGS. 4 to 6, the transmission system to the first transmission case C1 is connected to the transmission case M so as to project forward, and the first transmission shaft S1 is installed in the first transmission case C1. The second transmission case C2 in the left-right orientation, which is connected to the first transmission shaft S1, is internally provided with the second transmission shaft S2 that is interlocked with the first transmission shaft S1 via the first bevel gear mechanism B1, and the second transmission case C2 projects forward and obliquely upward. 3rd transmission case C3 connected in a state
A third transmission shaft S3 that is interlocked with the second transmission shaft S2 via a second bevel gear mechanism B2, and is interlocked at one end with the third transmission shaft S3 through the third bevel gear mechanism B3 and at the other end with a mowing frame. The fourth transmission shaft S4 tilted backward and supported by the fourth transmission case C4 attached to B
And a fifth transmission shaft S5 which is interlocked with the fourth transmission shaft S4 at the upper end via a fourth bevel gear mechanism B4 and has a fifth transmission shaft S5 in an up-down posture supported by the cutting transmission case CK at the lower end. . Then, the upper end of the third transmission shaft S3 is protruded upward from the third transmission case C3 and raised to the protruding shaft portion, and the drive sprocket 12 is mounted to drive the one left and right raising device 5 to drive the fourth transmission shaft S3. By mounting the pulley 13 for driving the tip conveying belt in the middle of S4, the tip conveying belt 10 is driven, and the fifth transmission shaft S5
The sprocket 14 for driving the stock-source transport chain is attached to the drive unit to drive the stock-source transport chain 9, and the stock-source transport chain 9 is interlocked with the binding device 11 to bind the binding device 11.
Is driven to engage the locking projection 9a of the stock carrier transport chain 9 with the packer 7 on the side of the weeding rod 4A, thereby driving this packer 7 and the other rotation of the bundling device 11 to the rotating shaft 11A. The other packer 7 and the raising device 5 are driven by mounting and mounting the other raising device 5 on the left and right, and the lower end of the fifth transmission shaft S5 and the drive crank shaft 6A of the cutting device 6 are cut and transmitted. The cutting device 6 is driven by interlocking with the chain type transmission device 15 in the case CK.

Further, as shown in detail in FIG. 6, the means for driving the swing type weed rod 4A causes the second transmission shaft S2 to project outward from the second transmission case C2, and its projecting end portion. The crank arm 16 is attached to the shaft, and the other end of the interlocking rod 17 whose one end is pivotally connected to the weed rod 4A is pivotally connected to the other end, so that the second transmission shaft S2 is used as the drive shaft 18 to rotate the crank arm 16. Along with this, the divider rod 4A is configured to swing and drive in the vertical direction. In the structure in which the interlocking rod 17 is pivotally connected to the crank arm 16, a support shaft 19 using bolts is attached to the crank arm 16, and a boss 20 rotatably fitted to the support shaft 19 is fixed to the interlocking rod 17. It is configured.

Then, as shown in FIG. 8, holes 21 for attaching the support shaft 19 are provided at a plurality of positions on the crank arm 16 which are different in distance from the rotational shaft center position and displaced in the rotational direction. , That is, the sack bar 4
A pivotal connection portion with A is formed, and a screw hole 22 for screwing and mounting the support shaft 19 is also formed at the rotation shaft center position of the crank arm 16.

Therefore, according to this structure, by selecting the hole 21, the rotation radius of the support shaft 19 can be changed to change the swing amplitude of the weed rod 4A, as shown in FIG. By mounting the support shaft 19 in the screw hole 22, the radius of gyration of the support shaft 19 is set to zero, and the shunt rod 4A is not rocked regardless of the rotation of the crank arm 16.

[Other Embodiment] In the above embodiment,
As shown in FIG. 9, the drive shaft 18 is connected to the crank arm 16
And the first bevel gear mechanism B1 and the second bevel gear mechanism B1 mounted on the lower transmission side arm mounting shaft 18A and the transmission case 23, that is, the second transmission case C2. The arm mounting shaft 18A is divided into a proximal shaft 18B on the power transmission side that is interlocked via a bevel gear mechanism B2, and the arm mounting shaft 18A is configured to be detachable from the transmission case 23. When the arm mounting shaft 18A is mounted on the case 23, the end portion of the arm mounting shaft 18A is inserted into the rotation stopper to interlock with the base shaft 18B.
A coupling 24 is provided for detaching the arm mounting shaft 18A when the arm mounting shaft 18A is detached from the transmission case 23. The means for attaching / detaching the arm mounting shaft 18A to / from the transmission case 23 is the arm mounting shaft 18A.
It is a means for attaching and detaching the bearing 25, which rotatably supports, to the transmission case 23. Bearing 25 and transmission case 23
The means for attaching the bearing 25 to the transmission case 23 is such that the bearing 25 is inserted into the transmission case 23 and abuts against the annular projection 23a formed on the transmission case 23 in the axial direction, and the retaining ring T engaged with the transmission case 23 in that state causes the bearing 25 to Is a means to prevent
By removing the retaining ring T, the bearing 25 is transferred to the transmission case 23.
It is designed to be pulled out. The coupling 2
4 is supported by the transmission case 23 via the bearing 26, and supports one end of the base end shaft 18B. Reference numeral 27 is a plug that closes the opening of the transmission case 23 formed when the arm mounting shaft 18A is removed. According to this another embodiment, when the swing type weed rod 4A is not attached, the arm mounting shaft 18A can be economically implemented by removing the arm attaching shaft 18A from the transmission case 23. If you later change to the specification with the swing type weeding rod 4A attached, arm mounting shaft 18A
By attaching the to the transmission case 23, the shunt rod 4A can be driven to swing.

In the above embodiment, an example of application to a two-row mowing and binding machine is shown, but the present invention can also be applied to a plural-row cutting or one-row cutting type mowing and binding machine.

In the above embodiment, an example of application to a reaper binding machine is shown, but the present invention can also be applied to a reaper without the binding device 11.

[Brief description of drawings]

FIG. 1 is a side view of the cutting and binding machine.

FIG. 2 is a plan view of the cutting and binding machine.

FIG. 3 is a plan view of the main part of the reaping unit.

FIG. 4 is a side view of a notch of a transmission device for a mowing part.

FIG. 5 is a schematic configuration diagram of a transmission device for a mowing unit.

FIG. 6 is a developed cross-sectional view of a main part of a transmission device for a mowing part.

FIG. 7 is a sectional view showing a state in which a support shaft is attached to a screw hole.

FIG. 8 is a front view of a crank arm.

FIG. 9 is a developed cross-sectional view of a main part of a transmission device for a mowing part, showing another embodiment.

[Explanation of symbols]

4A branch rod 16 crank arms 18 drive shaft 18A arm mounting axis 18B proximal shaft 21 Pivot connection 22 Pivot connection 23 Transmission Case 24 coupling

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References 58-182632 (JP, U) actual 58-53527 (JP, U) actual 58-105839 (58) (58) Field (Int.Cl. ⁷ , DB name) A01D 63/00-63/04

Claims (3)

(57) [Claims] 1. A weeding device for a reaper, which is provided with a crank arm for swinging a weeding rod .
The eccentric position of the shaft
Forming a pivotal connection part of the
The bushing rod can be freely replaced with the pivotal connection at the core position.
Weeding device for a reaper. 2. A weeding device for a reaper according to claim 1, wherein a plurality of pivotally connecting portions with the weed rod are formed at a plurality of locations on the crank arm that are different from each other in distance from the rotational axis center position. 3. A drive shaft of the crank arm is divided into a transmission lower arm mounting shaft on which the crank arm is mounted and a transmission upper side proximal end shaft which is housed in a transmission case, and the arm mounting shaft is transmitted. It is configured to be detachable from the case, and when the arm mounting shaft is attached to the transmission case, the end of the arm mounting shaft is inserted into the rotation stopper to interlock with the base shaft, while the arm mounting shaft The weeding device for a reaper according to claim 1 or 2, further comprising a coupling for separating an arm mounting shaft of the transmission case from the transmission case.