JP2019189055A - Walking type control machine - Google Patents

Abstract

To provide a walking type control machine capable of post-installing a safety clutch lever.SOLUTION: In a walking type control machine having an engine, a pair of left-right travel wheels, a handle laterally extending backward from the front and a transmission case for inner-packing a transmission mechanism for transmitting driving force from the engine to the travel wheels, a finger lever is provided for operating a clutch mechanism for executing an input-cut of power from the engine, and when engaging a clutch by operating the finger lever, even if the finger lever is not continuously operated, a position of the finger lever is holdably constituted in a clutch engaging position, and a safety clutch lever is installed in the finger lever, and when engaging the clutch by operating the safety clutch lever, when the safety clutch lever is not continuously operated, a position of the safety clutch lever is not held in the clutch engaging position.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a walking type management machine in which an operator performs farm work such as tillage while walking.

  The walking type management machine is configured such that the clutch is engaged by continuously operating the clutch lever to the clutch engagement side, and the clutch is disengaged when the hand is released from the clutch lever (deadman clutch).

JP2013-241085A

In the prior art, the deadman clutch as described above cannot be retrofitted, and is a dedicated machine equipped with a deadman clutch. For this reason, there was a demand that a deadman clutch can be retrofitted.
The present invention is to solve such problems.

  The problems of the present invention are solved by the following technical means.

  According to the first aspect of the present invention, the engine (E), the pair of left and right traveling wheels (3L, 3R), the handle (9) extending left and right from the front to the rear, and the driving force from the engine (E) are provided. A finger lever (13) for operating a clutch mechanism for turning on / off power from the engine (E) in a walking type management machine including a transmission case (1) equipped with a transmission mechanism for transmitting to the traveling wheels (3L, 3R). When the clutch is engaged by operating the finger lever (13), the finger lever (13) can be held at the clutch engagement position without continuing to operate the finger lever (13). When the safety clutch lever (59) is attached to the finger lever (13) and the clutch is engaged by operating the safety clutch lever (59), the safety clutch lever (5 If) does not continue to operate the can, and walk-behind tiller which is characterized in that a structure that does not hold the position of the safety clutch lever (59) at the clutch engaging position.

The invention of claim 2 is provided with a clutch lever (11) in addition to the finger lever (13), and when the clutch lever (11) is operated to engage the clutch, the clutch lever (11) does not have to be operated continuously. The clutch lever (11) can be held at the clutch engagement position. When the safety clutch lever (59) is attached to the finger lever (13), the clutch lever (11) is operated to engage the clutch. Then, when the clutch lever (11) is not continuously operated, the position of the clutch lever (11) is not held at the clutch engagement position. .
According to the invention of claim 3, the push-down part (59c) of the safety clutch lever (59) is arranged above the grip part (9La) of the left handle bar (9L) of the handle (9), and the front side of the push-down part (59c). The walking lever according to claim 2, wherein a finger lever (13) is provided on the front side and a clutch lever (11) is provided on the front side of the finger lever (13).

  In the invention of claim 1, since the safety clutch lever 59 can be attached to the conventional machine, versatility is improved.

The invention of claim 2 includes the finger lever 13 and the clutch lever 11, and when the safety clutch lever 59 is attached to the finger lever 13, the clutch lever 11 moves in the same manner as the safety clutch lever 59, so versatility is improved. To do.
In the invention of claim 3, since the safety clutch lever 59, the finger lever 13, and the clutch lever (11) are provided in order, the operability is improved.

Perspective view of walking type management machine Right side view of walking type management machine Top view of walking type management machine Enlarged side view near the clutch lever Enlarged side view near the clutch lever Enlarged side view near the clutch lever Enlarged side view near the clutch lever Perspective view of safety clutch lever Enlarged plan view near the clutch lever Enlarged perspective view near the clutch lever Enlarged perspective view near the clutch lever Enlarged perspective view of clutch lever mechanism

  Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. In the description of the embodiments, the left and right directions are referred to as left and right, respectively, and the forward direction is referred to as the forward direction and the backward direction is referred to as the rear direction, but the configuration of the present invention is not limited.

  In the walking type management machine of the present invention, left and right axles 2 and 2 are mounted on the lower part of a mission case 1 which is the center of the fuselage, and left and right traveling wheels 3L and 3R are attached to the left and right axles 2 and 2 protruding left and right Is configured.

  An input pulley 21 is attached to an input shaft 21 a that is above the left axle 2 and protrudes to the left of the mission case 1. On the other hand, the engine E is mounted on the engine base 15 that is attached to the front portion of the transmission case 1 and protrudes to the front side, and the speed reducer 33 is provided in the crankcase 16 of the engine E. The output pulley 20 is attached to. A transmission belt 32 is wound around the input pulley 21 and the output pulley 20 so that the power transmission can be turned on and off by the belt tension pulley 25 (clutch mechanism).

  A front hitch 15a is provided at the front portion of the engine base 15 so that various work machines can be mounted.

  The output shaft 20a on the engine E side is configured to output the rotation reduced in the reduction gear 33 attached to the crankcase 16 of the engine E.

Thereby, it can suppress that the diameter of the input pulley 21 becomes large.
The handle base 7 attached to the upper part of the mission case 1 is configured so that the handle base 8 is horizontally rotated around the vertical axis 8a and can be fixed at an arbitrary position. Reference numeral 8b denotes a handle rotating lever for rotating and fixing the handle base 8.
The handle base 8 is provided with left and right handle bars 9L and 9R that branch left and right obliquely upward. The left and right side clutch levers 12L and 12R are provided at the lower rear ends of the left and right handlebars 9L and 9R. When the left and right side clutch levers 12L and 12R are gripped, the left and right side clutches in the transmission case 1 are disengaged.
On the upper side of the left handle bar 9L, there is provided a clutch lever 11 that moves a belt tension pulley 25 that tensions or loosens the transmission belt 32 wound around the output pulley 20 and the input pulley 21 to turn the transmission on and off. The clutch lever 11 is configured to be operated by grasping with the left hand.
On the other hand, a finger lever 13 that is operated with the thumb of the left hand in a state where the grip part 9La of the left handle bar 9L is gripped with the left hand is provided. The finger lever 13 operates in the same manner as the clutch lever 11. That is, when the finger lever 13 is pushed down with the thumb, the belt tension pulley 25 moves to tension the transmission belt 32, and the transmission is turned on. Further, when the finger lever 13 is pushed up with the thumb and returned to the original position, the belt tension pulley 25 moves to loosen the transmission belt 32, and the transmission is cut off.
The left handle bar 9L and the right handle bar 9R are connected and fixed by a connecting rod 9A. A handle up / down lever 9B is provided near the connecting portion between the right handle bar 9R and the connecting rod 9A. When the handle up / down lever 9B is gripped with the right hand, the left handle 杆 9L and the right handle 杆 9R rotate around the horizontal axis 9C, and the left and right grips of the left handle 杆 9L and the right handle 杆 9R The configuration is such that the vertical positions of 9La and 9Ra are adjusted.
A rotary clutch lever RC is provided on the front side of the grip portion 9Ra of the right handle bar 9R. A hitch 10 is attached to the rear part of the transmission case 1 in the vicinity of the middle of the top and bottom, and a rotary working machine (not shown) connected to the hitch 10 is turned on and off by the rotary clutch lever RC. Further, the hitch 10 is configured so that various working machines such as a plow, a vertical stand, a trailer, and the like can be attached.
An emergency stop bar EL is provided at the center of the left handle bar 9L and the right handle bar 9R and in the vicinity of the front part of the left and right grips 9La, 9Ra. When the emergency stop bar EL is pushed downward, the belt tension pulley 25 moves to loosen the transmission belt 32, and the transmission is cut off. Although the emergency stop bar EL may be intentionally pushed down to stop, the emergency stop bar EL is pushed down in contact with the operation even if the aircraft unexpectedly moves backward due to an operation mistake or the like, and the aircraft stops. .

  On the left side of the handle base 8, a transmission lever 6 is provided to extend rearward and upward from the transmission unit 5 of the transmission case 1. Reference numeral 14 denotes an engine start / stop switch. Reference numeral 14a denotes an engine speed adjusting lever.

On and off of the clutch lever 11 will be described with reference to FIGS. 4 and 5. FIG. 4 shows a state where the clutch lever 11 is disengaged. The clutch lever 11 can be turned on and off by directly gripping the clutch lever 11 and turning it on and off, and by operating the finger lever 13.
In the method of operating the finger lever 13, when the finger lever 13 is operated (pressed down) about the first pivot fulcrum 13a in the A direction, the clutch lever 11 moves to the entering position, and the finger lever 13 is moved again in the A direction. When operated (pressed down), the clutch lever 11 is moved to the disengaged position.
When the finger lever 13 is operated (pressed down) in the direction A, the first plate 13b integrally rotates clockwise, and is attached to the roller 50a attached to the second plate 50 (indicated by hatching for easy understanding of the shape). Then, the second plate 50 rotates counterclockwise.
A third plate 51 is disposed on the back side of the second plate 50 (back side in FIG. 4), and the second plate 50 is connected to the third plate 51 at the second rotation fulcrum 52 (free fitting). Therefore, when the second plate 50 rotates counterclockwise, the third plate 51 also rotates counterclockwise. The rotation fulcrum of the third plate 51 is a third rotation fulcrum 53, which is loosely fitted to the third rotation fulcrum. The third rotation fulcrum 53 is also a rotation fulcrum of the clutch lever 11, and the clutch lever 11 is also loosely fitted.

When the third plate 51 rotates counterclockwise, the first protrusion 51a formed on the third plate 51 contacts the round bar 11a integrated (welded) with the clutch lever 11, and the clutch lever 11 is counterclockwise. Rotate around. When the clutch lever 11 rotates counterclockwise, the clutch plate 11b rotates counterclockwise, and when the clutch plate 11b rotates counterclockwise, the clutch arm connected (freely fitted) to the clutch plate 11b. 57 also rotates counterclockwise, and the clutch cable 58 is pulled in the direction B, so that the clutch is engaged.
FIG. 5 shows the clutch lever 11 in the engaged state. Since the first spring fulcrum 13a of the finger lever 13 is provided with a winding spring 54, the finger lever 13 returns to its original position even when the clutch lever 11 is engaged. The first tension spring 55 is hung between the left handle bar 9L and the pin 51b of the third plate 51. The second tension spring 56 is hung between the pin 51 b of the third plate 51 and the pin 50 b of the second plate 50. Thus, the second plate 50 and the third plate 51 are configured not to rotate carelessly.
Further, the imaginary line K2 connecting the fourth rotation fulcrum K1 connecting the clutch plate 11b and the clutch arm 57 and the end of the clutch cable 58 exceeds the fulcrum with respect to the third rotation fulcrum 53. The clutch lever 11 does not return to the cut position. Further, the first tension spring 55 and the second tension spring 56 do not have a force to return the clutch lever 11 to the disengaged position.
In order to put the clutch in the disengaged state, when the finger lever 13 is again operated (pressed down) in the direction A, the first plate 13b integrally rotates in the clockwise direction, and the second plate 50 (hatched for easy understanding of the shape) 2), the second plate 50 rotates clockwise. When the second plate 50 is rotated clockwise, the third plate 51 is also rotated clockwise. When the third plate 51 rotates clockwise, the protruding portion 51c formed on the third plate 51 contacts the round bar 11a integrated with the clutch lever 11, and the clutch lever 11 rotates clockwise. When the clutch lever 11 rotates clockwise, the clutch plate 11b rotates clockwise. When the clutch plate 11b rotates clockwise, the clutch arm 57 connected (freely fitted) to the clutch plate 11b also rotates clockwise. Rotating around, the clutch cable 58 is loosened in the direction C, and the clutch is disengaged.

  Next, the structure which provides the safety clutch lever 59 in the finger lever 13 is demonstrated (FIG. 6, FIG. 7). FIG. 8 shows a diagram of the safety clutch lever 59. A configuration in which the flat portion 59a of the safety clutch lever 59 is placed on the round bar portion 13c of the finger lever 13 from the upper side, and the round bar portion 13c of the finger lever 13 is sandwiched by the plate 60 from the lower side and fixed with screws 61. Yes. FIG. 9 shows a plan view with the safety clutch lever 59 attached.

Further, the safety clutch lever 59 is rotated with respect to the round bar portion 13c of the finger lever 13 by bringing the front end portion 59b of the safety clutch lever 59 into contact with the first rotation fulcrum 13a from below. The configuration is to prevent. FIGS. 6 and 10 (perspective view from the rear) show the clutch disengaged state, and FIGS. 7 and 11 (perspective view from the rear) show the clutch engaged state.
When the push-down portion 59c of the safety clutch lever 59 is pushed from the upper side, the finger lever 13 rotates in the A direction, so that the clutch is engaged as described above. At this time, the safety clutch lever 59 is in contact with the upper portion of the grip portion 9La of the left handle bar 9L.
When the safety clutch lever 59 is provided, the imaginary line K3 that connects the fourth rotation fulcrum K1 connecting the clutch plate 11b and the clutch arm 57 and the end of the clutch cable 58 is connected to the third rotation fulcrum 53. The fulcrum is not exceeded. By providing a fulcrum crossing preventing member 62 described later, the fulcrum is not exceeded.
For this reason, in order to maintain the clutch engaged state, it is necessary to keep pressing down the push-down portion 59 of the safety clutch lever 59 from above. When the safety clutch lever 59 is released, the clutch is disengaged.

Even when the safety clutch lever 59 is provided, since the clutch lever 11 can be operated in the clutch engagement direction, it is necessary to prevent the imaginary line K3 from exceeding the fulcrum with respect to the third rotation fulcrum 53. Therefore, the clutch arm 57 is provided with a fulcrum crossing preventing member 62. FIG. 12 is a view of the fulcrum crossing prevention member 62 as viewed from below.
As a result, even if the clutch lever 11 is operated in the entering direction, the fulcrum crossing preventing member 62 contacts the third rotation fulcrum 53, so that the clutch lever 11 cannot be further operated in the entering direction. Therefore, when the hand is released from the clutch lever 11, the clutch lever 11 returns to the disengaged position, and the clutch is disengaged.
Further, since the fulcrum crossing preventing member 62 has a symmetrical shape, a vertically symmetrical shape, and a longitudinally symmetrical shape, it can be prevented from being erroneously assembled at the time of assembling. In addition, the fulcrum crossing prevention member 62 is configured to abut against the third rotation fulcrum 53 regardless of the portion of the linear portion of the clutch arm 57, so that the assembly work is easy. Become.

As described above, when the hand is released from the safety clutch lever 59, the clutch is immediately disengaged, so that safe work is possible.
Further, a push-down portion 59c of the safety clutch lever 59 is disposed above the grip portion 9La of the left handle bar 9L of the handle 9, the finger lever 13 is provided on the front side of the push-down portion 59c, and the clutch lever 11 is placed on the front side of the finger lever 13. It is set as the structure to provide. Thereby, operability is improved.

E Engine 1 Transmission case 3L Left traveling wheel 3R Right traveling wheel 9 Handle 9L Left handle rod 9La Left handle rod grip 11 Clutch lever 13 Finger lever 59 Safety clutch lever 59c Safety clutch lever push-down portion

Claims (3)

  The engine (E), a pair of left and right traveling wheels (3L, 3R), a handle (9) extending left and right from the front to the rear, and the driving force from the engine (E) are used as the traveling wheels (3L, 3R). In the walking type management machine equipped with a transmission case (1) having a transmission mechanism for transmitting to (), a finger lever (13) for operating a clutch mechanism for turning on / off power from the engine (E) is provided. When the clutch is engaged by operating 13), the finger lever (13) can be held at the clutch engagement position without having to continue to operate the finger lever (13). When the clutch lever (59) is installed and the safety clutch lever (59) is operated to engage the clutch, the safety clutch lever (59) must not be operated. If, walk-behind tiller which is characterized in that a structure that does not hold the position of the safety clutch lever (59) at the clutch engaging position.   When the clutch lever (11) is provided in addition to the finger lever (13) and the clutch lever (11) is operated to engage the clutch, the clutch is engaged at the clutch engagement position without continuing to operate the clutch lever (11). When the position of the lever (11) is configured to be held and the safety clutch lever (59) is attached to the finger lever (13), the clutch lever (11) is operated by operating the clutch lever (11) to engage the clutch. 2. The walking type management machine according to claim 1, wherein the clutch lever (11) is not held at the clutch engagement position when the operation is not continued.   The push-down part (59c) of the safety clutch lever (59) is arranged above the grip part (9La) of the left handle bar (9L) of the handle (9), and the finger lever (13) is placed on the front side of the push-down part (59c). The walking type management machine according to claim 2, wherein a clutch lever (11) is provided on the front side of the finger lever (13).

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