JP2020018243A - Walking type managing machine - Google Patents

Abstract

To provide a walking type managing machine capable of executing a land-leveling action, which is excellent in turning operability.SOLUTION: A walking type managing machine 1 includes: travelling wheels 17L and 17R provided at the tip of right and left axles 16R and 16L supported by a mission case 11: a tilling device provided in front of the travelling wheels 17L and 17R; and a land-levelling member 6 supported so as to be vertically rotatable and be rotatable downward by its own weight in the lower part of the mission case 11, which is grounded behind the travelling wheels 17L and 17R.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a walking management machine.

  As one form of the walking-type management machine, for example, as described in Patent Literatures 1 and 2, a tilling device is provided in front of left and right running wheels, and various working machines (attachments) are provided behind the running wheels. A so-called front rotary type which is provided detachably is known. In the management machine described in Patent Literature 2, since a leveling member (leveling plate) is attached as a working machine, a leveling action is performed behind the traveling wheels, and ruts of the traveling wheels can be eliminated from the ground after plowing. . The leveling member is supported so as to be able to move up and down via a movable hitch installed at the rear of the fuselage.

  When turning the front rotary type management machine, it is necessary to push down the handle extended to the rear upper part of the body, and to lift the tilling device with the traveling wheel as a fulcrum. When the handle is depressed, the hitch raises the leveling member in conjunction therewith, so that the leveling member does not contact the ground and does not hinder the turning operation. However, before turning, it is necessary to fix the hitch so that the raised leveling member does not unintentionally descend, and after turning, it is necessary to release the fixation of the hitch and then push down the leveling member to descend. Therefore, it is required to perform a special operation before and after the turn.

JP-A-10-225205 JP 2006-20562 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a walking-type management machine that can exert a leveling action and is excellent in operability at the time of turning.

  The walk-behind management machine according to the present invention includes a traveling wheel provided at the tip of left and right axles supported by a transmission case, a tilling device provided in front of the traveling wheel, and a vertical A ground adjustment member that is rotatably supported so as to rotate downward by its own weight, and that contacts the ground behind the traveling wheel.

  According to such a configuration, in the front rotary type management machine in which the tillage device is provided in front of the traveling wheel, the ground leveling member is brought into contact with the ground behind the traveling wheel to perform the leveling operation. In addition, when the tillage device is lifted with the traveling wheel as a fulcrum during turning, the leveling member rotates upward while being in contact with the ground and does not penetrate deeply into the ground, so that it does not hinder the turning operation. Then, when the lifted tilling device is lowered, the leveling member rotates downward by its own weight, and is in a state where the leveling operation can be performed. Therefore, it is not necessary to perform a special operation before and after the turn, and the operability during the turn is excellent.

  It is preferable that the leveling member is formed in a V-shape in a plan view that is inclined rearward and outward in the body width direction. According to such a configuration, the straightness of the leveling member is improved, and the leveling operation can be effectively performed.

  It is preferable to have a lock mechanism capable of fixing the leveling member in a posture rotated upward. Accordingly, when it is desired to maintain a state in which the leveling member does not come into contact with the ground, such as when loading / unloading work in a vehicle, the leveling member can be fixed in a posture rotated upward.

  The differential lock device that regulates the differential between the left and right axles is activated in conjunction with the downward rotation of the ground adjustment member, and the differential lock device is released in conjunction with the upward rotation of the ground adjustment member. It is preferable to include a differential lock switching unit for setting the state. In this case, when the leveling member rotates upward with the turning operation, the differential lock device is released, and the left and right axles can be differentiated. Further, when the leveling member rotates downward with the operation after the turn, the differential lock device is activated, and the differential between the left and right axles is regulated. Therefore, operability during turning can be improved.

Left side view showing an example of a walking type management machine according to the present invention. FIG. 1 is a plan view of the walking management machine. Rear view of the walking management machine in FIG. Left side view showing the lower part of the transmission case Left rear perspective view showing the lower part of the transmission case Left rear perspective view showing the lower part of the transmission case The figure which shows an example of a differential lock switching means.

  An example of the walking management machine according to the present invention will be described.

[Overall structure of walking management machine]
First, the overall structure of the walking management machine will be briefly described. 1 to 3 are a left side view, a plan view, and a rear view, respectively, of the walking management device 1 of the present embodiment (hereinafter, may be simply referred to as “management device 1”). In FIG. 1, the front-back direction and the up-down direction of the management device 1 are indicated by arrows. Here, “forward” is a direction in which the management device 1 moves forward, and “back” is a direction in which the management device 1 moves backward. “Down” is the direction of gravity, and “up” is the opposite direction of gravity.

  The management machine 1 is a rotary working machine that can perform management work such as ridge work at the same time as tilling work. The body 10 that constitutes the main body of the management machine 1 has a mission case 11, an engine 12, and an engine frame 13. The transmission case 11 has a shape that is bent in a boomerang shape when viewed from the side, and is disposed below the body 10. An engine 12 is mounted and fixed above the transmission case 11 via an engine frame 13. The engine 12 is a drive source that generates power required for running and tilling work of the management machine 1. A fuel tank 14 is provided above the engine 12. The cap 14a is attached to a filler port provided on the upper part of the fuel tank 14. By removing the cap 14a, fuel can be supplied to the fuel tank 14.

  The transmission case 11 is linked to the engine 12 via a transmission case 15. The transmission case 15 has a built-in belt transmission mechanism 15 </ b> B that transmits power from the engine 12 to the transmission case 11. The belt transmission mechanism 15B includes a main clutch 15C that switches on and off power transmission to the transmission case 11. The main clutch 15C is configured to switch on / off of power transmission by changing the belt tension. The transmission housed in the transmission case 11 includes a traveling system transmission mechanism (not shown) for transmitting power to the pair of left and right axles 16L and 16R, and a work system transmission mechanism (for transmitting power to the work shaft 21 of the tilling device 20). (Not shown). The work system transmission mechanism includes a work clutch (not shown) for turning on and off power transmission to the tillage device 20.

  The left and right axles 16L, 16R are rotatably supported at the rear of the transmission case 11. The left axle 16L protrudes leftward from the transmission case 11, and a running wheel 17L is fixed to a tip end thereof. The right axle 16R protrudes rightward from the transmission case 11, and a traveling wheel 17R is fixed to a distal end thereof. As described above, the running wheels 17L and 17R for running the management machine 1 are provided at the tips of the axles 16L and 16R, respectively. Tires 17t, 17t are mounted on the outer circumferences of the running wheels 17L, 17R, respectively. The management machine 1 is a so-called front rotary type walking management machine, and a tilling device 20 is provided in front of the running wheels 17L and 17R. The tillage device 20 includes a working shaft 21, a tillage claw 22, and a rotary cover 23.

  Inside the transmission case 11, a differential device (not shown) for differentially driving the left and right axles 16L and 16R, and a differential lock device (not shown) for restricting the differential between the left and right axles 16L and 16R by the differential device. Are provided. The operation of the differential lock device is linked with the operation of the differential lock lever 41. The differential lock lever 41 is switched between a lock position (solid line in FIG. 2) for bringing the differential lock device into an operating state and an unlock position (dashed line in FIG. 2) for bringing the differential lock device into an unlocked state. That is, by rotating the differential lock lever 41, the left and right axles 16L and 16R can be locked to make the relative rotation impossible, or the lock can be released to make the relative rotation possible.

  The work shaft 21 is rotatably supported at the front of the transmission case 11. The work shaft 21 protrudes from the transmission case 11 to both left and right sides, and a plurality of tilling claws 22 are fixed to an outer peripheral surface thereof. The tilling nail 22 is formed by a curved elongated metal plate. The rotary cover 23 is fixed to the engine frame 13 so as to cover the tilling claw 22 from above. The rotary cover 23 prevents the soil splashed by the tilling claws 22 from scattering around. Auxiliary wheels 18 are arranged in front of the tilling device 20. The auxiliary wheels 18, 18 are supported by the engine frame 13 via an auxiliary wheel frame 18f so as to be vertically rotatable.

  A handle 30 extending rearward and upward from the rear of the transmission case 11 is provided behind the transmission case 11. The handle 30 includes a base side handle 31 and an upper side handle 32. The base side handle 31 is formed of a bar-shaped member that extends vertically in a rearwardly inclined posture. A lower end portion (front end portion) of the base side handle 31 is fixed to a rear portion of the transmission case 11 via a bracket 36 described later. A rope hook 31f is provided in the middle of the base side handle 31. At the time of transportation, the management machine 1 can be fixed to a truck bed or the like by hanging a rope on the rope hook 31f.

  The upper handle 32 is formed of a rod-shaped member having a loop shape, and constitutes a portion to be gripped by an operator. The front end of the upper handle 32 is connected to the upper end of the base handle 31 via a rotating shaft 33 whose axis is oriented in the left-right direction. The upper handle 32 can be turned up and down with respect to the base handle 31 about the turning shaft 33 as a fulcrum. On the right side of the rotating shaft 33, a handle fixing lever 34 is provided. When the handle fixing lever 34 is turned in a loosening direction, the upper handle 32 can be turned. When the handle fixing lever 34 is turned in a tightening direction, the turning position of the upper handle 32 is fixed.

  An accelerator lever 35 for adjusting engine rotation is provided on the handle 30. In the present embodiment, the accelerator lever 35 is attached to the left side of the upper handle 32. However, the present invention is not limited to this. For example, the accelerator lever 35 can be attached to the right side of the upper handle 32. The accelerator lever 35 is configured to be rotatable. The operator can adjust the rotational speed of the engine 12 by adjusting the rotation angle of the accelerator lever 35. The rotational operation position of the accelerator lever 35 is held until operated by an operator.

  An operation box 40 is provided at the front of the upper handle 32. In the operation box 40, a differential lock lever 41, an engine switch 42 and a main clutch lever 43 are arranged. An operation plate 50 is provided on a rear upper surface of the transmission case 11. The operation plate 50 is provided with a speed change lever 51 and a working depth adjustment lever 52. The rear ends of the speed change lever 51 and the cultivation depth adjusting lever 52 extend rearward and upward of the body 10. The management machine 1 can be artificially operated by the accelerator lever 35, the differential lock lever 41, the engine switch 42, the shift lever 51, the tillage depth adjusting lever 52, and the like.

  The differential lock lever 41 is an operating tool for operating the differential lock device as described above. The differential lock lever 41 extends rearward and upward from the base end portion covered by the operation box 40 toward the operator (rear side of the machine body 10). The proximal end of the differential lock lever 41 is connected to a differential lock device via a link mechanism, a wire, or the like. The base end of the differential lock lever 41 is supported via a rotation shaft (not shown) whose axis is directed in the vertical direction. The differential lock lever 41 can rotate left and right with respect to the upper handle 32 about the rotation axis. The operation box 40 is formed with a guide groove 41 g for guiding the rotation of the differential lock lever 41.

  The engine switch 42 is an operating tool for starting and stopping the engine 12. When the engine switch 42 is pressed and turned to a predetermined position, the engine 12 can be started, and the engine switch 42 is held in a floating state. When the raised engine switch 42 is pressed, the engine switch 42 returns to the initial position, and the engine 12 stops. Therefore, when the operator wants to stop the traveling of the management machine 1 or the tilling operation in an emergency, the operator can cope by pressing the engine switch 42. The engine switch 42 is provided at the center of the upper surface of the operation box 40 and is disposed in front of the differential lock lever 41.

  The main clutch lever 43 is formed of a U-shaped member that is long in the left-right direction, and a central portion thereof is covered with an operation box 40. The central portion of the main clutch lever 43 is supported via a rotating shaft 43a whose axis is directed to the left and right. The main clutch lever 43 can rotate up and down around its rotation shaft 43a. The operation box 40 is formed with guide grooves 43g, 43g for guiding the rotation of the main clutch lever 43. The main clutch lever 43 is disposed above the upper handle 32, and when the main clutch lever 43 is rotated downward, the main clutch lever 43 covers the upper handle 32 substantially along the upper handle 32. For this reason, the operator can bundle and hold the main clutch lever 43 with the upper handle 32.

  The main clutch lever 43 is connected to the main clutch 15C via a link mechanism, a wire, or the like. The main clutch lever 43 rotates vertically between an upper rotation position where the main clutch 15C is engaged and a lower rotation position where the main clutch 15C is disengaged. When the operator bundles and grips the main clutch lever 43 with the upper handle 32, the main clutch lever 43 is rotated downward, the main clutch 15C is engaged, and the power from the engine 12 is transmitted to the transmission case 11. On the other hand, when the operator has released his / her hand from the main clutch lever 43, the main clutch lever 43 is rotated upward, the main clutch 15C is disengaged, and power is not transmitted to the transmission case 11.

  The speed change lever 51 switches the forward / backward movement of the management machine 1, switches the forward speed (“slow” or “fast”), and switches the rotation and stop (“work” or “move”) of the work shaft 21. Operating tool for The base end of the speed change lever 51 is connected to a gear constituting a transmission in the transmission case 11. When the shift lever 51 is set to “work”, the work clutch is engaged, the power from the engine 12 is transmitted to the tillage device 20, and the work shaft 21 rotates. When the speed change lever 51 is set to a position other than “work”, the work clutch is disengaged, power is not transmitted to the tillage device 20, and the work shaft 21 stops rotating. The operation plate 50 is formed with a guide groove 51g for guiding the tilting operation of the transmission lever 51.

  The tillage depth adjusting lever 52 is an operating tool for adjusting the height (the position in the vertical direction) of the auxiliary wheels 18 with respect to the tillage device 20. The base end of the cultivation depth adjusting lever 52 is connected to the auxiliary wheel frame 18f via a link mechanism pivotally supported by the machine body 10. By operating the tillage depth adjusting lever 52, the auxiliary wheels 18, 18 can be turned up and down, and the tillage depth can be adjusted. The operation plate 50 is formed with a guide groove 52g for guiding the tilting operation of the tillage depth adjusting lever 52. The speed change lever 51 and the working depth adjustment lever 52 both extend rearward and upward of the body 10 and are arranged side by side in the left-right direction.

  A bracket 36 is fixed above a rear part of the transmission case 11. The bracket 36 is arranged below the operation plate 50. The bracket 36 is configured such that a movable hitch 37 (see FIG. 4) can be attached to a rear surface thereof. Various working machines (not shown) can be attached to the hitch 37 as needed. That is, in the management machine 1, various working machines (attachments) are detachably provided behind the traveling wheels 17L and 17R. Examples of the working machine include, but are not limited to, a cultivator and a seeder.

[Leveling material]
As described above, the management machine 1 is provided at the distal ends of the left and right axles 16L, 16R supported by the transmission case 11, and at the front of the running wheels 17L, 17R. And a tilling device 20. Furthermore, the management machine 1 of the present embodiment includes a ground leveling member 6 for leveling the ground tilled by the tilling device 20 as shown in an enlarged manner in FIGS. The ground leveling member 6 is supported by a lower portion of the transmission case 11 so as to be vertically rotatable and to rotate downward by its own weight. In addition, the ground leveling member 6 touches the ground behind the traveling wheels 17L and 17R to perform the ground leveling function.

  In the front rotary type management machine 1, since the tilling device 20 is provided in front of the running wheels 17L and 17R, a rut is formed on the ground after the running wheels 17L and 17R pass, but the rut is leveled. It can be erased by the member 6. In addition, the leveling member 6 is supported so as to rotate downward by its own weight and is not strongly pressed against the ground, so that it does not needlessly hold the soil and is less likely to cause inconvenience such as slippage. . Since the ground leveling member 6 is supported by the transmission case 11 and is mounted at a different place from the hitch 37, the ground leveling member 6 is mounted on the hitch 37 with a work machine such as a cultivator while performing the ground leveling action. It can be performed.

  When turning the management machine 1, by pushing down the handle 30, the tillage device 20 is lifted with the traveling wheels 17 </ b> L and 17 </ b> R as fulcrums. At that time, the leveling member 6 rotates upward while being in contact with the ground and does not penetrate deeply into the ground, so that it does not hinder the turning operation. The upward rotation of the leveling member 6 is a relative rotation of the leveling member 6 with respect to the transmission case 11 as shown by a broken line in FIG. After turning, when the lifted tillage device 20 is lowered, the leveling member 6 is rotated downward by its own weight, and is in a state where a leveling operation can be performed. Therefore, it is not necessary to perform a special operation before and after the turn, and the operability during the turn is excellent.

  In this embodiment, as shown in FIG. 2, the leveling member 6 is formed in a V-shape in a plan view that is inclined rearward and outward in the body width direction. For this reason, the shape of the leveling member 6 becomes convex toward the front, and the straightness of the leveling member 6 is improved (when the leveling action is performed, the leveling member 6 is hardly inclined). Further, as shown in FIG. 1, a part of the front end of the V-shaped grounding member 6 in a plan view is disposed at a position overlapping the traveling wheels 17L and 17R in a side view, and the grounding member 6 is compactly configured. . Further, as shown in FIG. 3, the left and right ends of the ground leveling member 6 are arranged at positions overlapping the running wheels 17L and 17R in rear view, respectively, and are configured so that a required range can be leveled.

  The leveling member 6 is arranged below the hitch 37 and is supported by the lower rear end of the transmission case 11. Therefore, the leveling member 6 is disposed closer to the axles 16L and 16R than when it is attached to the hitch 37. When a force for lifting the body 10 is generated by a reaction force acting on the tillage device 20 during the tillage work, the force is changed in a direction of pressing the traveling wheels 17L, 17R against the ground, and therefore, it is disposed near the axles 16L, 16R. The leveling member 6 is appropriately pressed against the ground without applying a strong force by the operator, and as a result, excellent leveling action can be achieved.

  The leveling member 6 is formed of a rigid metal plate (for example, an iron plate), and is supported in an upright posture with respect to the ground. The leveling member 6 is supported via a rotating shaft 61 whose axis is directed in the left-right direction, and can be vertically rotated with respect to the transmission case 11 about the rotating shaft 61 as a fulcrum. The turning fulcrum (that is, the turning shaft 61) of the leveling member 6 is disposed behind the axles 16L and 16R and below the axles 16L and 16R. The leveling member 6 has extending portions 6e, 6e extending forward, and the rotation shaft 61 is inserted into insertion holes 61h, 61h formed in them. The rotating shaft 61 is supported by brackets 62,62. The brackets 62, 62 are fixed to the transmission case 11 by fixtures including bolts 63, 64.

  The leveling member 6 has a stopper 65 for restricting the downward rotation of the leveling member 6. Accordingly, the ground leveling member 6 does not pivot downward more than necessary, and it is possible to prevent the ground leveling member 6 from penetrating too deeply into the ground when performing the ground leveling action. In the present embodiment, the downward rotation of the leveling member 6 is restricted by the stopper 65 abutting from below on the collar 63c through which the bolt 63 is inserted. The stopper 65 is provided at the front end of the extension 6e. In FIGS. 4 and 5, the stopper 65 is in a state of operation, so that the ground leveling member 6 does not further rotate downward.

  The management machine 1 has a lock mechanism 60 that can fix the ground adjustment member 6 in a posture rotated upward. Accordingly, when it is desired to maintain a state in which the leveling member 6 does not come into contact with the ground, such as in a loading / unloading operation when mounted on a vehicle, the leveling member 6 can be fixed in a posture rotated upward. In the present embodiment, the lock mechanism 60 includes a collar 64c through which the bolt 64 is inserted, and a hook 66 that can be engaged with the collar 64c. That is, when the ground adjustment member 6 rotated upward is pushed diagonally downward and forward (in the direction of the arrow P in FIG. 4), the hook 66 formed on the ground adjustment member 6 engages with the collar 64c as shown in FIG. The member 6 is fixed in a posture rotated upward. The insertion holes 61h, 61h are formed as long holes in order to enable such a leveling member 6 to be pushed.

  FIG. 7 shows an example of the differential lock switching means 67 using the leveling member 6. The differential lock switching means 67 sets the differential lock device to an operating state in conjunction with the downward rotation of the leveling member 6, and sets the differential lock device to a release state in conjunction with the upward rotation of the leveling member 6. That is, when the ground adjustment member 6 rotates upward with the turning operation as shown in FIG. 7B, the differential lock device is automatically released, and the left and right axles 16L and 16R can be differentially moved. When the ground adjustment member 6 is rotated downward with the operation after the turning as shown in FIG. 7A, the differential lock device is automatically activated, and the differential between the left and right axles 16L and 16R is regulated. Thereby, the trouble of operating the differential lock lever 41 can be omitted, and the operability at the time of turning can be further improved.

  In the example of FIG. 7, the differential lock switching means 67 includes a wire 67w that is pulled as the ground leveling member 6 rotates downward. The wire 67w is connected to a differential operation arm 19 (see FIG. 3) provided on the transmission case 11. The differential lock device has a fork shaft (not shown) that moves left and right in accordance with the tilt of the differential operation arm 19, and a differential lock gear (not shown) that engages with the fork shaft, and the wire 67w is pulled. When the differential operating arm 19 is tilted, the fork shaft moves to disengage the differential lock gear from the axle 16R, and the differential lock is released.

  The present invention is not limited to the above-described embodiment at all, and various improvements and modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Walking type management machine 6 Ground control member 10 Body 11 Transmission case 12 Engine 16L Axle 16R Axle 17L Running wheel 17R Running wheel 20 Tilling device 21 Work shaft 30 Handle 37 Movable hitch 41 Diff lock lever 60 Lock mechanism 67 Diff lock switching means

Claims (4)

Running wheels provided at the tips of the left and right axles supported by the transmission case,
A tillage device provided in front of the running wheel,
A walk-behind management machine, comprising: a ground-fixing member supported at a lower portion of the transmission case so as to be rotatable vertically and rotatable downward by its own weight, and grounded behind the traveling wheels.   The walking management machine according to claim 1, wherein the leveling member is formed in a V-shape in a plan view that is inclined rearward and outward in the body width direction.   The walking-type management device according to claim 1, further comprising a lock mechanism that can fix the ground adjustment member in a posture rotated upward.   The differential lock device that regulates the differential between the left and right axles is activated in conjunction with the downward rotation of the ground adjustment member, and the differential lock device is released in conjunction with the upward rotation of the ground adjustment member. The walking management device according to any one of claims 1 to 3, further comprising a differential lock switching unit that sets the state to a state.

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