JP4014175B2 - Braking device for walking type agricultural machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a configuration of a braking device in a walking type farm work machine such as a walking type rice transplanter.
[0002]
[Prior art]
Conventionally, in walking type farm work machines such as walking type rice transplanters, the power from the engine mounted on the traveling machine body is transmitted to the axle through the main clutch and the mission, and the wheels attached to this axle are driven to rotate, To brake the travel of the vehicle, (1) simply reduce the engine output to the idling state, (2) turn off the main clutch and cut off the power transmission, and (3) the axle . There was a method of turning off the side clutch by providing a side clutch, and (4) a method of braking by providing a brake on the axle.
[0003]
[Problems to be solved by the invention]
However, in the above methods (1), (2) and (3) , there is no active braking action just by shutting off the engine power, and only stopping by the resistance between the wheel and the ground, Further, after the engine is stopped, there is a risk that the traveling machine body may inadvertently move on a slope or the like.
[0004]
In the above method (4) , the brake lever must be operated separately, which is troublesome as an operation in the walking type farm work machine, and a mechanism for holding the brake lever on the braking operation side when parking is required. There was a problem.
The present invention has been made in order to eliminate the drawbacks of these conventional techniques, and can be reliably braked by a simple operation, and can also reliably perform braking during parking. An object of the present invention is to provide a braking device.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a braking device in a walking agricultural machine according to the first aspect of the present invention includes a traveling wheel mounted on an axle on a traveling machine body on which an engine is mounted, and uses power from the engine as a main clutch. In the walking type agricultural work machine configured to transmit to the axle via a mission, the axle is provided with a parking brake means, and a clutch operating lever for manually turning on and off the main clutch The horizontal engagement bar is extended in a direction orthogonal to the first support shaft, and the engagement bar can be rotated about the axis of the first support shaft and rotated about the axis orthogonal to the axis of the first support shaft. A second support shaft perpendicular to the axis of the first support shaft is disposed below the first support shaft, and the axis of the first support shaft is disposed on the second support shaft. Brake operation lever on one side On the other hand, the main clutch operation lever is supported so as to be rotatable around the axis of the second support shaft, and the engagement bar is formed in the first locking groove formed in the upper end of the brake operation lever. It is configured to be selectable between a fitting posture and a posture in which the engagement bar is fitted in a second locking groove formed in a recess at the upper end of the main clutch operating lever, and the clutch operating lever is turned off. parking brake means is intended to OFF, and rotates in the opposite direction to the clutch operating lever with respect to oN operation direction of the main clutch parking brake means is configured to switch to oN when switching.
[0006]
According to a second aspect of the present invention, in the braking device for the walking type agricultural machine according to the first aspect, the clutch operation lever is moved in one direction along a substantially linear operation guide groove from the OFF position. While the main clutch is configured to be manually turned on, a substantially L-shaped parking brake operation groove communicating with the OFF position is formed in the operation guide groove, the clutch operation lever, and the parking brake means When the clutch operating lever is OFF, the parking brake means can be switched OFF and the clutch operating lever is rotated in the opposite direction to the clutch ON operation along the parking brake operating groove. The parking brake means is configured to be turned on.
[0007]
According to a third aspect of the present invention, there is provided the braking device for the walking type agricultural work machine according to the first or second aspect, wherein the parking brake means is rotated in either the forward rotation direction or the reverse rotation direction of the traveling wheel. In contrast, the engagement clutch can be engaged and disengaged.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment embodying the present invention will be described. FIG. 1 is a side view of a walking type Nijo Ueda transplanter, FIG. 2 is a plan view, and FIG. 3 is a schematic view of a braking device.
1 and 2, reference numeral 1 denotes a float that slides in a farm scene B on the lower surface of a power transmission case body 5 having an engine 2 at the front and a seedling table 3 and a handle 4 at the rear. 6 shows a rice transplanter in which wheels 7 are mounted on the left and right sides of the machine body 5 via swing cases 8. On the machine body 5 of the rice transplanter 1, a claw shaft 9 that is rotationally driven by the power output from the engine 2 via the main clutch (not shown) and the mission 13 is positioned in front of the seedling mounting table 3. A rotary seedling planting device 10 is mounted on the left and right ends of the claw shaft 9.
[0009]
The rotary seedling planting device 10 includes a small-sized rotary case 11 that is fitted and fixed to an end of a claw shaft 9 that is pivotally supported with respect to the machine body 5. As shown by the arrow A in the side view of the machine 1, it rotates in the right direction, and a sun gear is rotatably fitted on the claw shaft 9 in the rotating case 11. The machine body 5 is locked so as not to rotate through an appropriate rotation phase adjusting means.
[0010]
On the outer peripheral portion of the rotating case 11, that is, on both left and right ends, a drive shaft for a pusher is supported in parallel with the claw shaft 9 at a position where the distance from the claw shaft 9 is equal. Is fixed to the rotating case 11 so as not to rotate, and a planetary gear having the same number of teeth as the sun gear is rotatably fitted on both drive shafts. Further, in the rotating case 11, an intermediate shaft is pivotally supported at an intermediate position between the claw shaft 9 and both drive shafts, and an intermediate gear meshing with both the sun gear and the planetary gear is mounted on the intermediate shaft. By fitting, the gears, the cam gears, and the missing gear stopper gears transmit the inconstant speed rotation to the planting shafts fitted to the drive shafts with the rotation of the rotating case. The gear train is configured.
[0011]
On the other hand, a hollow shaft planting shaft is rotatably fitted on both drive shafts in the rotary case 11, and one end of the planting shaft and the drive shaft project outside the rotary case 11. A hollow seedling planting case 20 provided with a split claw 19 for seedlings at the tip is fixed to the projecting end of the planting shaft at a position where the split claw 19 is directed toward the seedling mount 3.
[0012]
On the other hand, each seedling planting case 20 is provided with a hollow guide shaft extending in parallel with the split claw 19 so as to be movable up and down, and an extrusion tool 14 is provided at the lower end of the hollow guide shaft 27. The pusher 14 is configured to move downward only when each seedling planting case 20 comes in the vicinity of its lower limit.
With this configuration, along with the revolution rotation of the rotating case 11 in the arrow A direction in the seedling planting device 10, rotation about the drive shaft in the direction opposite to the arrow A direction by the same rotation angle as that of the revolution. Therefore, the both seedling planting cases 20 turn in the direction of the arrow A in a state of facing the direction of the seedling stage 3, and during this turning movement, the side facing the seedling stage 3 is below from the top. , After splitting a single seedling from the seedling mat on the seedling stand 3 with the split claw 19 at the tip, the tip of the split claw 19 enters the field B in the vicinity of the lower limit of lowering, Thereafter, it rises from the farm scene B. Further, when the seedling planting case 20 comes to a lowering lower limit where the tip of the split claw 19 enters the farm scene B, the pusher 14 descends toward the tip of the split claw 19 to remove the seedling from the farm scene. Since the planting is carried out by pushing into B, and the pushing planting is finished, the pusher 14 returns to the original position retracted from the tip of the split nail 19 at the same time as the split nail 19 comes out of the farm scene B. is there.
[0013]
Next, the structure of the braking device (parking brake means) 16 will be described with reference to FIGS.
As described above, the swing case 8 is rotatably provided at the tip of the axle 15 that protrudes laterally from the case 13a of the mission 13, and power is transmitted to the wheel 7 at the tip of the swing case 8 by a chain or the like in the swing case 8. . The stationary block 17 in the braking device 16 is loosely fitted to the axle 15 and fixed to the inner surface of the case 13a with a bolt or the like (not shown).
[0014]
The loose fitting side block 18 is mounted so as to be movable in the axial direction with respect to the axle 15 via the key 19 so as to face the tooth surface of the fixed side block 17 so as to rotate together with the axle 15. The loosely fitted pressing spring 20 is configured to press and bias the loosely fitted block 18 to the fixed block 17. A middle portion of the bell crank lever 21 that engages with an annular groove formed on the outer periphery of the loose fitting side block 18 is disposed so as to be rotatable about the support shaft 22 and the other end of the bell crank lever 21 is connected to the case 13a. It protrudes outward from the insertion hole 23 provided in the, and is connected to one end of the brake wire 24.
[0015]
A manual clutch operation lever 25 for turning on and off the main clutch disposed between the engine output shaft and the transmission is provided in the middle of the pair of left and right steering handles 4 and 4 that protrudes from the rear part of the traveling machine body 5. It is disposed at a location of a guide plate 26 provided in the section, and is connected to a clutch wire 27 for turning on and off the main clutch and a brake wire 24 of the braking means via a switching means described later. That is, as shown in FIGS. 3A and 4, the lower end of the clutch operating lever 25 is bent at the upper end of the boss 31 that is rotatably fitted to the first support shaft 30 having the Y1-Y2 axis. The lower end of the auxiliary boss 31a in which the engaged bar 25a is extended in a direction (X1-X2 axis) orthogonal to the axis (Y1-Y2) and the middle part of the engagement bar 25a is rotatably fitted. It is fixed to the boss 31 by welding or the like.
[0016]
Below the boss 31, the second support shaft 32 in the (X1-X2 axis) direction has a brake operation lever 33 on one side and a main clutch operation lever 34 on the other side of the boss 31. It is rotatably supported. When the clutch operating lever 25 is rotated around the boss 31 in the X1 direction, the engaging bar 25a is fitted into the first locking groove 37 formed in the upper end of the main clutch operating lever 34, and the clutch is operated. When the lever 25 is rotated around the boss 31 in the X2 direction, the engaging bar 25a is disengaged from the locking groove 37, while the free end side of the engaging bar 25a is open upwardly at the upper end of the brake operating lever 33. 2 is fitted in the locking groove 38.
[0017]
A clutch wire 27 for turning on and off the main clutch is connected to the lower end of the main clutch operating lever 34, and the other end of the brake wire 24 is connected to the lower end of the brake operating lever 33. Reference numerals 39 and 40 are stoppers for restricting the rotation of the main clutch operating lever 34 and the brake operating lever 33, respectively. Further, urging tension springs 41 and 42 attach the levers 34 and 33 in the stopper direction. It is a force.
[0018]
As shown in FIG. 3B, the guide plate 26 is provided with an operation guide groove. The operation guide groove includes a substantially linear clutch operation guide groove 35 formed in the Y1-Y2 direction and a parking brake operation groove 36 provided in communication therewith, and the clutch operation lever is provided along these grooves. 25 is movable, and when the clutch operating lever 25 is placed in the midway position in the Y1-Y2 direction, the clutch operating lever 25 assumes the posture of the solid line in FIG. 38, the main clutch operating lever 34 is held in a position in contact with the stopper 39, the main clutch is turned off, and the brake wire 24 is moved against the spring 20. The brake operating lever 33 is held in a posture in contact with the stopper 40 by being pulled by the biasing force of the biasing tension spring 42, so that the loose fitting side block in the parking brake means is held. 18 is disengaged from the tooth surface of the fixed block 17, the parking brake device is in a state of OFF (cut).
[0019]
When the clutch operating lever 25 is rotated in the Y1 direction in a state where the engaging bar 25a is locked in the locking groove 37, the main clutch is turned on.
On the contrary, when the operation lever 25 is rotated in the Y2 direction with the engagement bar 25a being engaged only in the engagement groove 38 (the clutch operation lever 25 is in the opposite direction to the ON operation direction of the main clutch). When the brake wire 24 is rotated, the brake wire 24 is loosened against the urging force of the urging tension spring 42, and the loose fitting side block 18 is engaged with the tooth surface of the fixed side block 17 by the spring 20, and the parking brake means is turned on. Switch to (On) state. In order to maintain this state, it is preferable to form a recess groove 36a for locking the clutch operation lever 25 at the end of the parking brake operation groove 36 in the Y2 direction.
[0020]
According to this configuration, the output from the engine 2 is cut off by rotating the clutch operation lever 25 in the OFF direction of the main clutch, and then the clutch operation lever 25 is further operated along the parking brake operation groove 36 to operate the clutch ON. Since the parking brake means is turned on (turned on) and can be braked by rotating in the opposite direction, the traveling machine body 5 does not move carelessly even when the engine 2 is stopped.
[0021]
Further, the clutch operating lever 25 can surely execute switching between ON / OFF of the main clutch and ON / OFF of the parking brake means by the guide pattern of the operation guide groove, and there is no operation error. As shown in FIG. 5, the engagement tooth surface (meshing clutch pawl) 43 facing the fixed side block 17 and the loosely fitted side block 18 is formed in a trapezoidal shape, so that the forward rotation direction and the reverse direction of the axle 15 are reversed. The parking brake means can be easily engaged in any rotation in the rotational direction.
[0022]
【The invention's effect】
As described above, the braking device in the walking type agricultural working machine according to the first aspect of the present invention includes a traveling wheel mounted on an axle on a traveling machine body on which an engine is mounted, and the main clutch receives power from the engine. In the walking type agricultural work machine configured to transmit to the axle via a mission, the axle is provided with a parking brake means, and a clutch operating lever for manually turning on and off the main clutch The horizontal engagement bar is extended in a direction orthogonal to the first support shaft, and the engagement bar can be rotated about the axis of the first support shaft and rotated about the axis orthogonal to the axis of the first support shaft. A second support shaft perpendicular to the axis of the first support shaft is disposed below the first support shaft, and the axis of the first support shaft is disposed on the second support shaft. Brake operation lever on one side On the other hand, the main clutch operation lever is supported so as to be rotatable about the axis of the second support shaft, and the engagement bar is fitted in the first locking groove formed in the upper end of the brake operation lever. It is configured to be able to select a full posture and a posture in which the engagement bar fits into a second locking groove formed in a recess at the upper end of the main clutch operation lever, and switches the clutch operation lever to an OFF state. when the parking brake device is turned OFF, the clutch operating lever to rotate in the opposite direction to oN operation direction of the main clutch parking brake unit is one that was configured to switch to oN.
Therefore, since the operation direction of the clutch operation lever with respect to the engagement of the main clutch and the engagement of the parking brake is switched so as to be completely opposite to each other, there is no mistake in operation and it is possible to actively brake even when the engine is stopped. Therefore, it is possible to reliably prevent the traveling machine body from moving carelessly. Further, since the parking brake means is provided at a location where the torque for transmitting power from the transmission to the axle is small, the brake means has a small load, and even a brake with a small braking capacity can be reliably braked.
[0023]
According to a second aspect of the present invention, in the braking device for the walking type agricultural machine according to the first aspect, the clutch operation lever is moved in one direction along a substantially linear operation guide groove from the OFF position. While the main clutch is configured to be manually turned on, a substantially L-shaped parking brake operation groove communicating with the OFF position is formed in the operation guide groove, and the clutch operation lever and the parking brake means When the clutch operating lever is OFF, the parking brake means can be switched OFF and the clutch operating lever is rotated in the opposite direction to the clutch ON operation along the parking brake operating groove. The parking brake means is configured to be turned on.
[0024]
Therefore, since the clutch operation lever is merely pivoted along the guide groove and the parking brake operation groove, an operation error can be reliably prevented.
According to a third aspect of the present invention, there is provided the braking device for the walking type agricultural working machine according to the first or second aspect, wherein the parking brake means is rotated in either the forward direction or the reverse direction of the traveling wheel. Since it is configured with a meshing clutch that can be engaged and disengaged, the braking operation can be surely entered and exited in either the forward or reverse rotation of the axle. There is an effect that it is easy.
[Brief description of the drawings]
FIG. 1 is a side view of a rice transplanter.
FIG. 2 is a plan view of a rice transplanter.
3A is a side sectional view of a braking device and a clutch operation lever, and FIG. 3B is a diagram showing a shape pattern of an operation guide groove.
FIG. 4 is a perspective view of switching means using a clutch operating lever.
FIG. 5 is a view showing the shape of the meshing tooth surface of the parking brake means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 5 Traveling machine body 3 Seedling stand 4 Handle 10 Rotating seedling planting device 13 Mission 15 Axle 16 Braking device 17 Fixed side block 18 Free fitting leather block 24 Brake wire 25 Clutch operation lever 25a Engagement bar 26 Guide plate 27 Clutch wire 33 Brake Operation lever 34 Main clutch operation lever 35 Clutch operation guide groove 36 Brake operation guide groove

Claims (3)

In a walking type agricultural working machine configured to arrange a traveling wheel to be attached to an axle on a traveling machine body mounted with an engine, and to transmit power from the engine to the axle through a main clutch and a mission,
While the axle is provided with parking brake means,
Extending the lateral engagement bar in the clutch operating lever for manually turning on and off the main clutch in a direction perpendicular to the first support shaft,
The engagement bar is mounted so as to be rotatable about the axis of the first support shaft and to be rotatable about an axis perpendicular to the axis of the first support shaft,
Below the first support shaft, a second support shaft orthogonal to the axis of the first support shaft is disposed,
On the second support shaft, a brake operation lever is supported on one side across the axis of the first support shaft, and a main clutch operation lever is supported on the other side so as to be rotatable about the axis of the second support shaft. ,
An attitude in which the engagement bar fits into a first locking groove formed in a recess at the upper end of the brake operation lever, and an engagement bar in a second locking groove formed in a recess at the upper end of the operation lever for the main clutch. Configured so that it can be selected in a posture that fits,
The parking brake means is turned off when the clutch operation lever is switched to the OFF state, and the parking brake means is turned ON when the clutch operation lever is rotated in the opposite direction to the ON operation direction of the main clutch. Braking device for walking type agricultural machine characterized by the above.   The clutch operation lever is moved in one direction along a substantially linear operation guide groove from the OFF position to manually turn on the main clutch, while the operation guide groove has the OFF position. A substantially L-shaped parking brake operating groove communicating with the parking brake is formed, and the clutch operating lever and the operating transmission portion of the parking brake means can be switched OFF when the clutch operating lever is OFF. The walking type according to claim 1, wherein the parking brake means is turned on when the clutch operating lever is rotated in a direction opposite to the clutch ON operation along the parking brake operating groove. Braking device for agricultural machines. The walking according to claim 1 or 2, wherein the parking brake means is constituted by a meshing clutch that can be engaged and disengaged in both the forward and reverse rotation directions of the traveling wheel. Braking device for type agricultural machines.

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