JP3204900B2 - Intermittent control device of reaping clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting clutch intermittent control device configured to detect the presence or absence of a grain stalk in a stalk raising path and automatically switch the cutting clutch on and off.
In particular, the urging force of the coil spring, which changes when the reaping clutch lever is switched between "on", "off" and "automatic intermittent", increases or decreases the biasing force of the clutch spring that biases the reaping clutch toward the "on" side. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting clutch intermittent control device capable of controlling and intermittently switching power.

[0002]

2. Description of the Related Art Conventionally, a mowing clutch lever provided on a traveling operation section is provided in a mowing machine which is provided with a cereal stem raising body at a tip portion of an airframe and travels on a field while cutting a raised stem of the culm with a cutting blade. The manual on / off control of the clutch according to the above, a configuration in which an automatic control for detecting the presence or absence of the grain stalk by a sensor bar provided in the raising path of the grain stalk and intermitting and cutting the harvesting clutch is added, and such a configuration is known. As an intermittent control mechanism of the mowing clutch having such a configuration, the shifter shaft of the mowing clutch is connected to an ammunition that urges the mowing clutch toward the "on" side and an ammunition that urges the mowing clutch toward the "off" side. The cutting clutch is turned on and off by rotating the shifter shaft forward and backward with the urging force of each machine, or the rotation of the sensor bar that detects the presence of grain culm is detected by the clutch spring that urges the cutting clutch to the "off" side. In motion Ri configuration in which the shifter to switch to "ON" position to perform power transmission (JP-1-17
No. 9619).

However, in the former one of the above-mentioned constructions, since the intermittent operation of the reaping clutch is performed by a pair of rams having different urging directions, a switching structure thereof is extremely complicated, and each ramming machine is complicated. It requires advanced adjustment technology when assembling and disassembling, and it also tends to cause intermittent switching operation failure by inducing a change in the urging force of each of the ammunition over time,
In the latter configuration, the mowing clutch is always urged to the "disengaged" side by the clutch spring, so it is easy to cause slippage due to poor clutch connection or half-clutch. It was difficult to secure the operation, and there was a fear that stable harvesting work by the reaper could not be performed smoothly.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned situation to solve the conventional problems, and an object thereof is to turn on the power transmission of the reaping clutch. This can be performed reliably by the clutch spring biasing to the side, and the biasing force of the coil spring connected to the reaping clutch lever is opposed to the "on" side biasing force of the clutch spring, and the Control switching between "on", "off" and "automatic on / off" can be easily performed only by the magnitude of the biasing force of the coil ammunition, thereby eliminating clutch connection failure during switching operation and ensuring stable and reliable operation. An object of the present invention is to provide a cutting clutch intermittent control device capable of performing a proper cutting operation.

[0005]

In order to solve the above-mentioned problems, a first technical means adopted by the present invention is to provide a connecting member at one end of a connecting arm which swings around a shifter shaft of a reaping clutch. The main control mechanism, which connects the harvesting clutch lever through the cutting clutch lever and switches the harvesting clutch on and off, connects a sensor bar provided inside the grain stem raising path to advance and retreat with its rotation operation. A cutting clutch intermittent control device connected to the other end of the connecting arm via a rod and provided with a sub-control mechanism for intermittently connecting and disconnecting the cutting clutch in connection with an operation for detecting the presence or absence of a grain culm. A spline-fitted driven shaft is coaxially inserted with a clutch spring that urges the reaping clutch toward the “in” side, and is connected between one end of the connection arm and the connection end of the connection member. In addition, a first coil ammunition is interposed, and a second coil ammunition is elastically mounted between the other end of the connection arm and the connection rod, and is pulled by operation of the cutting clutch lever. When the urging force of the first coil spring exceeds the "on" side of the clutch spring, the connecting arm swings to the "off" side of the reaping clutch and holds the reaping clutch on the "off" side. At the switching operation position of the cutting clutch lever in which the urging force of the clutch spring and the urging force of the first coil ammunition are balanced, the second coil is moved by the advancing and retreating operation of the connecting rod interlocked with the grain culm detection operation of the sensor bar. It is characterized in that the connecting arm is configured to swing to the "on" or "off" side of the reaping clutch via an ammunition,

As a second technical means, a support side is formed at one end of a connecting arm connecting the base end side of the first coil ammunition by bending an extra length at the front end side orthogonally. A connecting rod for pivotally connecting the base end side of the bracket and connecting the distal end side of the first coil bullet and the connecting end of the connecting member;
In order to slidably pass through the through hole formed in the support side and hold the reaping clutch in the "disengaged" position, the connecting member is connected until the distal end side of the first coil machine contacts the inside of the support side. When the pulling operation is performed, the swinging movement of the connecting arm linked to the advancing and retreating operation of the connecting rod is prevented by the bracket holding the first coil ammunition between one end of the connecting arm and the support side. It is characterized by having comprised.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 and 2, reference numeral 1 denotes a reaper, 2 denotes a pre-processing unit of the reaper 1, and the pre-processing unit 2 includes a pair of left and right left and right support members 5 on a support frame 5 including a horizontal pipe 3 and a vertical pipe 4. Grain stem raising bodies 6, 6 are erected in a rearwardly inclined manner, and a mowing portion 8 provided with a cutting blade 7 and a binding mechanism 7a is provided at a lower rear portion thereof. A transmission pipe 9 is obliquely provided on the body 1a toward the rear, and transmits a rotational driving force from the engine 10 to a transmission shaft 12 provided in the transmission pipe 9 via a transmission 11, and the culm raising body 6 is provided. , 6 and the mowing unit 8 are driven. Reference numeral 13 denotes a driving handle extending obliquely rearward of the body main body 1a. Reference numeral 14 denotes a speed change lever provided on the body main body 1a. A harvesting clutch lever 16 that can be switched among three stages of "on", "off", and "automatic intermittent".
Are arranged.

At the connection position between the vertical pipe 4 and the transmission pipe 9, as shown in FIGS. 3 and 4 (b), a cutting clutch slidable in the axial direction via a clutch spring 17 a inserted through a driven shaft 17. A gear case 19 having an internal gear 18 is interposed. The rotational driving force of the transmission shaft 12 entering the gear case 19 is transmitted to a bevel gear 21 inserted through the driven shaft 17 via a bevel gear 20 and the bevel gear The clutch claw 1 of the reaping clutch 18 is provided in a clutch groove 21 a formed on the back surface of the clutch 21.
8a is removably fitted, and the mowing clutch 18 is pressed to the bevel gear 21 side, that is, always to the "in" side by the urging force of the clutch spring 17a coaxially inserted into the driven shaft 17. ing. Also,
A shifter 22 that slides the reaping clutch 18 in the axial direction.
Is fixed to a shifter shaft 23 that protrudes horizontally on one side outer surface of the gear case 19, and as shown in FIGS. 5 and 6, swings a connecting arm 24 that is pivotally mounted on a swing center 23 a of the shifter shaft 23. By operating, the shifter shaft 23
Is rotated forward and reverse to engage and disengage the clutch claw 18a and the clutch groove 21a of the bevel gear 21 to interrupt the transmission of the driving force to the mowing unit 8. Reference numeral 25 denotes a driven shaft which is provided inside the vertical pipe 4 and transmits a driving force to the cereal stem raising bodies 6 and 6.

On the other hand, as shown in FIGS. 5 to 7, a sensor bar 26 for detecting the presence or absence of a cereal stem is formed between the cereal stem raising members 6, 6 at a position near the end of the horizontal pipe 3. The other end of the connecting rod 28 rotatably supported on the rotation ring 27 on the side of the horizontal pipe 3 facing the inside of the cereal stem raising path a as a base, and a distal end connected to the rotation ring 27, is connected to a compression coil spring 29. Is connected to the lower end of the connecting arm 24 via a sensor bracket 30 which is coaxially elastically mounted, and the connecting arm 24 is rotated in the front-rear direction by a connecting rod 28 which advances and retreats by rotating the sensor bar 26. A connecting wire 31 having one end connected to the reaping clutch lever 16 is connected to the upper end of the connecting arm 24 that is located substantially directly above the swing center 23a from the connecting position of the connecting rod 28. The cutting wire 32 is connected via a tension coil spring 33, and the tension of the connecting wire 31 is increased or decreased according to the switching operation position of the cutting clutch lever 16 between "ON", "OFF", and "AUTO". The connection arm 24 is rocked by the force and the urging force of the extension coil spring 33.

The upper end of the connecting arm 24 for connecting the base end of the tension coil spring 33 is provided with
As shown in (a), the base end side of a bracket 35 having a support side 34 formed by bending the extra length at the distal end side orthogonally is pivotally connected, and the distal end side of the extension coil spring 33 is connected to the wire 31. Connection rod 32 interposed between the connection end of
It is slidably inserted through a through hole 36 formed in the support side 34. 33a is a tension coil spring 33.
A reference numeral 33b denotes an auxiliary bracket for connecting the base end of the extension coil spring 33 to the upper end of the connection arm 24; and 37 a connection of the connecting rod 32 for locking the locking portion 33a. A hole 38 is a stopper provided at an intermediate portion of the connecting rod 32.

In the above-described configuration, as shown in FIG. 4A, when the cutting clutch lever 16 is tilted to the forward "in" position, as shown in FIG. The tension coil spring 33 is loosened and held at the locking position of the stopper 38, and the connecting rod 32 and the bracket 35 are integrated with each other without the urging force of the tension coil spring 33 being applied. Then, the urging force of the clutch spring 17a of the reaping clutch 18 unilaterally acts on the tension coil spring 33 to which the urging force does not act, so that the clutch claws 18a are fitted on the reaping clutch 18 in the clutch grooves 21a of the bevel gear 21. As a result, the clutch 18 is brought into the engaged state, the power of the transmission shaft 12 is transmitted to the driven shaft 25 via the gear case 19, and the cutting unit 8 is irrespective of the presence or absence of the harvested grain culm in the grain stem raising path a.
Holds the mowing drive operation.

When the cutting clutch lever 16 is returned from the "on" position to the "automatic intermittent" position,
As shown in FIG. 8C, the connecting rod 32 is pulled in the direction of the arrow A via the connecting wire 31. At this time, the stopper 38 of the connection rod 32 is pressed against the supporting side 34 of the bracket 35 by the urging force of the extension coil spring 33 in the compression direction, and the bracket 35 is also pulled and connected while maintaining this pressed state. The arm 24 rotates in the direction of arrow B. Then, with the rotation of the connection arm 24,
The shifter shaft 23 also rotates in the direction of arrow B, and the shifter 22 switches the cutting clutch 18 to the disengaged state against the "on" side biasing force of the clutch spring 17a.

The biasing force of the clutch spring 17a for holding the cutting clutch 18 in the disengaged state is balanced with the biasing force of the tension coil spring 33 generated from the stopper 38 of the connecting rod 32 as a starting point. The connecting arm 24 interposed between the springs 17a and 33 is in a swing standby state in which the cutting arm 18 can be switched to the "on" side while the cutting clutch 18 is switched to the "off" side.

When the cereal stalk enters the cereal stalk raising path a in the waiting state of swinging of the connecting arm 24 as described above, as shown by a chain line in FIG.
6 rotates, and the connecting rod 28 protrudes in the direction of arrow C with the rotation of the rotating ring 27. Then, the connecting rod 28
Of the clutch spring 17a via the sensor bracket 30 on which the compression coil spring 29 is elastically mounted.
, The balance of the urging force with the tension coil spring 33 is broken, and the connecting arm 24 rotates in the direction of arrow D, and accordingly, the shifter shaft 23 also rotates in the direction of arrow D. Therefore, the reaping clutch 18
Is turned on and the cutting blade 7 is driven to raise the grain stalk and the path a
The root of the cereal stem that has entered the stalk will be cut off.

When there is no cereal culm in the cereal culm raising path a, the sensor bar 26 returns to the position shown by the solid line in FIG. 7, and the connecting rod 28 is pulled back through the rotating ring 27, and the reaping clutch 18 is disengaged. The urging force of the clutch spring 17a and the urging force of the tension coil spring 33 that are held in the off state return to the initial equilibrium state, and the cutting clutch 18 in the on state is switched to the off state and held.
The interception of the cutting clutch 18 is automatically performed by the detection of the presence or absence of a grain stem by the sensor bar 26.

Next, when the reaping clutch lever 16 is operated from the "automatic intermittent" position to the rear "off" position, FIG.
As shown in (d), the connecting rod 32 is connected to the connecting wire 31.
The stopper 38 is pulled out in a direction away from the support side 34 through the support hole 34, and the locking portion 33a of the tension coil spring 33 connected to the connection hole 37 of the connection rod 32 comes into contact with the inside of the support side 34, Extension coil spring 33
Is held between the auxiliary bracket 33b and the support side 34 while maintaining the urging force in the extension direction. Then, the urging force of the tension coil spring 33 overcomes the urging force of the clutch spring 17a that holds the mowing clutch 18 in the disengaged state, and the mowing clutch 18 is constantly switched to the "off" side and held.

Here, when the cereal stem enters the cereal stem raising path a, the sensor bar 26 in contact with the cereal stem is rotated in the same manner as described above, and the connecting rod 28 is turned by the rotation of the rotary ring 27 as indicated by an arrow. Projecting in the direction C;
Since the extension coil spring 33 is fixed between the arm and the auxiliary bracket 33b, the swing motion of the connecting arm 24 itself is prevented by the bracket 35, and the projecting operation force of the connecting rod 28 reaches the connecting rod 28. Absorbed by the compression coil spring 29 of the sensor bracket 30 interposed therebetween, regardless of the presence or absence of the grain culm, no switching control of the harvesting clutch 18 linked with the grain culm detection operation by the sensor bar 26 is performed. .

Therefore, only by changing the biasing force of the tension coil spring 33 in connection with the switching operation of the reaping clutch lever 16, the “on” and “off” of the reaping clutch 18 can be performed.
Each control setting of "off" and "automatic intermittent" can be easily performed, and since the side surface area of the tension coil spring 33 is protected by the bracket 35, catching, breakage, deformation, etc. of the grain culm can be prevented. Thus, the switching operation of the reaping clutch 18 can be performed.

[0019]

In short, according to the present invention, a cutting clutch lever is connected to one end of a connecting arm swinging about a shifter shaft of a cutting clutch via a connecting member, and the switching operation of the cutting clutch lever is performed. A sensor bar provided inside the cereal stem raising path is connected to the other end of the connecting arm via a connecting rod which moves forward and backward with its rotation operation, to the main control mechanism for intermittently cutting and connecting the harvesting clutch. And a sub-control mechanism for connecting and disconnecting the cutting clutch in conjunction with the detection operation of the cutting clutch, wherein the driven clutch with the cutting clutch spline-fitted has the cutting clutch “inserted”. A first coil spring is interposed between one end of the connecting arm and the connecting end of the connecting member, and the connecting arm is inserted between the one end of the connecting arm and the connecting end of the connecting member. A second coil ammunition is mounted between the other end of the clutch and the connecting rod, and the biasing force of the first coil ammunition pulled by operating the cutting clutch lever causes the clutch spring to “enter”. When the side biasing force is exceeded, the connecting arm is swung to the "disengaged" side of the reaping clutch, and the biasing force of the clutch spring holding the reaping clutch on the "disengaged" side and the biasing force of the first coil spring In the switching operation position of the cutting clutch lever in which the cutting arm is balanced, the connecting arm is turned on or off of the cutting clutch via the second coil ammunition by the reciprocating operation of the connecting rod interlocking with the grain culm detection operation of the sensor bar. The connecting arm that connects the base end of the first coil ammunition is configured to swing to the “off” side. Pivotally connecting the proximal end side of the bracket formed with The connecting rod which connects the the tip side of the coil bullet machine and connecting end of the interlocking member slidably inserted in transmural insertion hole bored in the support side,
In order to hold the reaping clutch in the “disengaged” position, when the connecting member is pulled until the leading end side of the first coil machine comes into contact with the inside of the supporting side, the connecting arm connected to the forward / backward operation of the connecting rod. Since the swinging movement is prevented by the bracket holding the first coil ammunition between one end of the connecting arm and the support side, the first coil is connected to the switching operation of the cutting clutch lever. Only by changing the urging force of the ammunition, it is possible to easily perform each control setting of the "on", "off" and "intermittent" of the reaping clutch. Since the side surface area of the first coil ammunition is protected by the bracket forming the support side, it is possible to obtain a smooth operation feeling without causing a problem such as bending of the coil armature and catching of the grain culm. As a result, a reliable switching operation of the cutting clutch can be ensured. The configuration around the connecting arm is made compact, so that assemblability can be improved, and workability at the time of inspection and maintenance can be improved without the need for advanced adjustment technology. Since the clutch spring always urges the reaping clutch toward the "on" side, it is possible to reliably transmit power without slippage due to poor clutch connection or half-clutch. Etc., which are very useful and novel effects.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2A is a perspective view of a main part showing a configuration around a driving handle. (B) is a principal part perspective view which shows arrangement | positioning of a reaping clutch lever.

FIG. 3 is a transmission system diagram of a driving force from an engine to a preprocessing unit.

FIG. 4A is a side view of a main part showing a mounted state of a cutting clutch lever. (B) is a sectional view of a main part showing an internal structure of the gear case at a connection position between the vertical pipe and the transmission pipe.

FIG. 5 is a main part side view showing a connection state of a sensor bar, a connection rod, a sensor bracket, and a connection wire via a bracket to the connection arm.

FIG. 6 is a main part plan development view showing a connection state of a connection wire to a connection arm via a sensor bar, a connection rod, a sensor bracket, and a bracket.

FIG. 7 is a perspective view of a main part showing a configuration around a connecting arm.

FIG. 8A is an exploded perspective view showing an assembled state of a tension coil spring, a connecting arm, and a bracket.
(B) to (d) show the connecting arm at the “on”, “off”, and “automatic intermittent” positions of the reaping clutch lever, respectively.
It is an operation explanatory view showing each operation state of a tension coil spring and a connecting wire.

[Explanation of symbols]

 Reference Signs List 16 cutting clutch lever 17 driven shaft 17a clutch spring 18 cutting clutch 23 shifter shaft 24 connecting arm 26 sensor bar 28 connecting rod 29 compression coil spring (second coil spring) 31 connecting wire (connecting member) 32 connecting rod 33 tension coil spring (1st coil ammunition) 34 Support side 35 Bracket a Grain stem raising path

Claims (2)

(57) [Claims] 1. A main control mechanism for connecting a cutting clutch lever via a connecting member to one end of a connecting arm that swings about a shifter shaft of the cutting clutch, and connecting and disconnecting the cutting clutch by switching operation of the cutting clutch lever. In addition, a sensor bar provided inside the cereal stem raising path is connected to the other end of the connecting arm via a connecting rod that moves forward and backward with the rotation operation, and the harvesting is linked to the detecting operation of the presence or absence of the cereal stem. A cutting clutch intermittent control device provided with a sub-control mechanism for intermittently engaging and disengaging a clutch, wherein a driven spring having a spline fitted with the cutting clutch includes a clutch spring for urging the cutting clutch toward the `` on '' side. The first arm is inserted coaxially, and a first end is provided between one end of the connecting arm and a connecting end of the connecting member.
And a second coil ammunition mounted between the other end of the connecting arm and the connecting rod, and a first coil ammunition pulled by operation of the cutting clutch lever. When the urging force of the machine exceeds the "on" side of the clutch spring, the connecting arm swings to the "off" side of the reaping clutch, and the clutch spring holds the reaping clutch on the "off" side. At the switching operation position of the reaping clutch lever in which the biasing force and the biasing force of the first coil spring are balanced, the forward and backward movement of the connecting rod interlocking with the grain culm detection operation of the sensor bar causes the connection lever to move through the second coil spring. An interlocking control device for the cutting clutch, wherein the connecting arm swings toward the "on" or "off" side of the cutting clutch. 2. A base end side of a bracket having a support side formed by bending a distal end extra length orthogonally to one end of a connection arm connecting a base end side of the first coil bullet machine. A connecting rod, which is pivotally connected and connects the distal end side of the first coil bullet and the connecting end of the connecting member, is slidably inserted through a through hole formed in the support side, and the cutting clutch is connected. When the connecting member is pulled until the leading end side of the first coil ammunition contacts the inside of the support side to hold the “off” position, the swinging motion of the connecting arm linked to the forward and backward operation of the connecting rod 2. The intermittent control device for a reaping clutch according to claim 1, wherein the first arm is supported between the one end of the connecting arm and the support side by a bracket fixed to the first coil armature. [0001]