JP3948830B2 - Ground-operated equipment for riding farm equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for maneuvering a riding type farm working machine such as a riding rice transplanter or a small tractor from the ground.
[0002]
[Prior art]
In the above agricultural machines, when the machine is taken in and out of the field or loaded onto the truck bed, etc., the machine may tilt considerably back and forth. It is desirable to be able to do it. As means for responding to such a request, for example, as disclosed in Japanese Patent Laid-Open No. 7-96839, an auxiliary handle lever is attached to a pitman arm that steers the front wheel, and an operator standing on the ground can Means have been proposed for forcibly operating the pitman arm by swinging the auxiliary handle lever at the section.
[0003]
[Problems to be solved by the invention]
According to the above-mentioned conventional means, the operator can control the aircraft from the ground, and can safely carry out the loading and unloading of the aircraft to and from the field and the loading platform of the truck. Since the auxiliary handle lever is directly connected to the auxiliary handle lever, the auxiliary handle lever rotates to the left and right about the pivot axis of the pitman arm. The lever became quite long, and the amount of operation at the tip of the lever increased to make the pitman arm swing by a set amount, resulting in poor usability. On the other hand, if the pitman arm is swung by a set amount with a small lever operation amount, the auxiliary handle lever becomes short, and it has to be operated close to the front wheel.
[0004]
Further, in the above-described conventional means, it is necessary to remove the auxiliary handle lever from the pitman arm and keep it in a normal state when riding on the airframe, and there is room for improvement in handling.
[0005]
The present invention has been made paying attention to such points, and it is an object of the present invention to provide a ground control device that is easy to use from the ground, is easy to use, and is excellent in handling. To do.
[0006]
[Means for Solving the Problems]
[Configuration, operation and effect of the invention of claim 1]
[0007]
(Configuration) The invention according to claim 1, the left-right center of the front of the vehicle body, comprising a grip operation device having a base end portion is pivotally supported swingably around transverse axis, the gripping operation tool The front wheel is configured to be steerable, and the grip operation tool is erected in the left and right center of the front part of the traveling body, and the lying posture in which the tip of the grip operation tool swings forward from the standing position. The front part of the traveling machine body can be pushed down through the grip operation tool by pressing the grip operation tool in the lying posture from the ground downward .
[0008]
(Effect) According to the above configuration, during normal boarding operation, the grip operation tool is stored in a standing posture standing in the center of the left and right of the front part of the traveling aircraft, and only when it is necessary to maneuver down to the ground. Switch to the lying posture with the tip of the gripping tool swinging forward.
[0009]
(Effect) Therefore, according to the invention according to claim 1, the boarding maneuvering and the ground maneuvering can be used easily and quickly. As described above, the usability is good and the handling property is also excellent.
[0010]
[Configuration, operation and effect of invention of claim 2]
[0011]
(Structure) The invention according to claim 2 is the invention according to claim 1, further comprising a linkage interrupting mechanism for interrupting linkage between the grip operating tool and the front wheel.
[0012]
(Operation) According to the above configuration, the front wheel and the grip operating tool are linked only when ground control is necessary, and the linkage is normally refused. Thereby, it is possible to avoid operating the grip operating tool by steering the front wheels during normal boarding operation.
[0013]
(Effect) Therefore, according to the invention according to claim 2, the grip operation tool is not operated during normal boarding operation, and it is easy to use while keeping the grip operation tool .
[0014]
[Configuration, operation and effect of invention of claim 3]
[0015]
(Configuration) The invention of claim 3 is the invention of claim 2, wherein, and the grip operating member and the front wheel becomes uncoupling state in a standing posture of the grip operation device, grip manipulation tool in horizontal position of the grip operation device and the front wheel The linkage interrupting mechanism is configured so that is in a linkage state.
[0016]
According to (action) above configuration, when is laid down the grip operation device to ground maneuver, a state which is associated automatically and the front wheel grip operation device can ground maneuver automatically when erected storing grip operation device The linkage is released, resulting in a state where the grip operating tool is not operated.
[0017]
(Effects) Therefore, according to the invention according to claim 3, the desired linkage or non-linkage state is automatically displayed without specially requiring the linkage and release operation of the grip operating tool and the front wheel, and handling. Excellent in properties.
[0018]
[0019]
[0020]
[0021]
[Configuration, operation and effect of invention of claim 4 ]
[0022]
(Structure) The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the grip operating tool is prevented from switching from a standing posture to a lying posture swinging forward. Locking means are provided.
[0023]
(Effect | action) According to the said structure, a grip operation tool does not switch from a standing posture to a lying posture carelessly by locking at the time of boarding operation .
[0024]
(Effect) Therefore, according to the invention which concerns on Claim 4 , a grip operation tool does not switch from a standing posture to a lying posture carelessly, but can be steered accurately.
[0025]
[Configuration, operation and effect of invention of claim 5 ]
[0026]
(Constitution) The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the main clutch lever extended from the main clutch pedal is configured to be manually operable from the ground. , it is arranged to brake the rear wheel in conjunction with the cutting operation of the main clutch lever.
[0027]
( Operation ) According to the above configuration, since the main clutch lever can be manually operated from the ground even in the state of being operated from the ground using the grip operation tool , the traveling drive can be stopped and the rear wheels can be braked. You can easily stop the aircraft in the middle of the slope.
[0028]
(Effect) Therefore, according to the invention according to claim 5 , by manually operating the main clutch lever from the ground, it is possible to stop the traveling drive and brake the rear wheel, and to easily stop the aircraft in the middle of the slope. Can be controlled accurately from the ground.
[0029]
[Configuration, operation and effect of invention of claim 6 ]
[0030]
(Structure) The invention according to claim 6 is the invention according to any one of claims 1 to 4 , wherein the grip operating tool includes a main clutch lever, and the rear is interlocked with the turning operation of the main clutch lever. The wheel is configured to brake .
[0031]
(Operation) According to the above configuration, when performing ground maneuvering, the main clutch lever can be turned off while operating the grip operating tool to quickly stop the aircraft.
(Effect) Therefore, according to the invention which concerns on Claim 6 , when performing ground control, a body can be stopped quickly and operativity becomes still more favorable.
[0032]
[0033]
[0034]
[Configuration, operation and effect of invention of claim 7 ]
[0035]
(Structure) The invention according to claim 7 is the invention according to any one of claims 1 to 6 , wherein a pitman arm that steers the front wheel, and a rotating member that can rotate integrally with the pitman arm; , provided with a rotational operation freely rotating operation member in the lateral direction is arranged on the traveling machine body front side portion than the pitman arm, and a linkage member for interlocking connecting the rotating member and the rotating operation member, grip operating tool By rotating the rotation operation member, the front wheel can be steered via the linkage member, the rotation member, and the pitman arm.
[0036]
(Operation) According to the above configuration, by setting the interlocking ratio between the rotation member and the rotation operation member, the operation of the pitman arm with respect to the operation amount of the grip operation tool while keeping the grip operation tool at a certain length. The amount can be set arbitrarily. Thus, while so as to operate the gripping operation tool from the desired distance away from the vehicle body, and a state of operating a large pitman arm only by operating the grip operation tool bit, the operation amount of the grip operation device increases It is possible to arbitrarily obtain a state where the operation force is reduced and used.
[0037]
(Effect) Therefore, according to the invention which concerns on Claim 7 , when maneuvering a traveling body by standing on the ground and operating a grip operation tool , it is grip operation from the position which is not too close to a traveling body and is not too far away. Although it is possible to operate the tool, it has become easy to use with the ratio of the operation amount of the grip operation tool and the operation amount of the pitman arm being convenient.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a riding rice transplanter as an example of a riding agricultural machine to which the present invention is applied. In this rice transplanter, a four-row planting planting device 5 is connected to a rear portion of a four-wheel drive type traveling machine body 3 having a front wheel 1 and a rear wheel 2 through a hydraulically driven link mechanism 4 so as to be movable up and down. Configured. An engine 6 is mounted on the front portion of the traveling machine body 3, and the engine output is transmitted to the transmission case 7 that pivotally supports the front wheel 1 via the belt transmission device 8, and further gear shifting is performed in the transmission case 7 so that the front wheel 1 is The transmission output that is driven and transmitted from the transmission case 7 is transmitted to the rear transmission case 9 that pivotally supports the rear wheel 2, and the working power that is extracted from the rear part of the transmission case 7 is transferred to the seedling. The shaft 5 is transmitted to the device 5.
[0039]
As shown in FIGS. 3 and 4, at the bottom of the transmission case 7, a pitman arm 11 swinging left and right around the axis a by a steering handle 10 is equipped in a forward cantilevered manner. The front end of the pitman arm 11 and the knuckle arms 12 of the left and right front wheels 1 are interlocked and connected by a tie rod 13 to constitute a front wheel steering link mechanism 14.
[0040]
As shown in FIG. 6, a sprocket 15 as a rotation member is connected to the lower end portion of the pitman arm 11 concentrically with the axis a, and a rotation operation member is provided at a front side portion of the pitman arm 11. The operation sprocket 16 is rotatably arranged around an axis b parallel to the axis a, and the sprocket 15 and the operation sprocket 16 are wound and interlocked by a chain 17 as an interlocking member.
[0041]
As shown in FIGS. 6 and 7, the operation sprocket 16 is rotatably supported by a fixed boss 19 fixed to the machine body, and is spline-fitted or key-fitted to the operation sprocket 16 at the center thereof. The operating shaft 20 is slidably inserted up and down. The upper portion of the operating shaft 20 is supported by a fixed boss 22 via a rotating boss 21, and a rotating bracket 23 extending forward from the rotating boss 21 is supported so as to be rotatable around the axis b. Has been. A balance arm 24 is pivotally connected to the pivot bracket 23 so as to be pivotable up and down about a horizontal axis c. The rear end of the balance arm 24 and the operation shaft 20 are interlocked and connected by a pin 25, and the balance. The operation shaft 20 is slid up and down along the axis b as the arm 24 moves up and down around the axis c. Further, a steering lever 26 as a gripping operation tool is pivotally connected to the front end portion of the balance arm 24 so as to be swingable up and down around a lateral axis d, and a disc spring provided on the axis d, etc. Thus, the steering lever 26 can be held at an arbitrary undulation rotation position.
[0042]
A contact portion 26a is provided at the base end portion of the steering lever 26 so as to go below the front end portion of the balance arm 24, and the steering lever 26 is moved forward by a predetermined angle α from a substantially vertical standing posture. When tilted and rotated, the contact portion 26a comes into contact with the front end of the balance arm 24 from below and the steering lever 26 cannot be rotated further forward with respect to the balance arm 24. Further, the steering lever 26 Is tilted forward within a range of angle β larger than the angle α, the balance arm 24 integrated with the steering lever 26 rotates about the axis c, and the rear end of the balance arm 24 is As a result, the operation shaft 20 is slid upward.
[0043]
A disk 28 having a pair of pins 27 erected upward is fixed to the lower end of the operation shaft 20, and the operation sprocket 16 is provided with an engagement hole 29 facing the pins 27. In a state where the operation shaft 20 is slid downward, the pin 27 is removed from the engagement hole 29, and the link between the operation shaft 20 and the operation sprocket 16 is cut off. By being slid upward, the pin 27 is engaged with the engagement hole 29 and the operation shaft 20 and the operation sprocket 16 are interlockedly connected.
[0044]
That is, when the steering lever 26 is stood up and stored, the linkage between the operation shaft 20 and the operation sprocket 16 is broken, and when the steering lever 26 is tilted forward in the range of the angle β, the operation shaft 20 and the operation sprocket 16 are moved. The interlocking intermittent mechanism 30 to which these are linked and connected is configured.
[0045]
As described above, when the steering lever 26 is rotated forward and tilted to the set angle α or more and the operation shaft 20 and the operation sprocket 16 are interlocked and connected, the steering lever 26 is swung left and right to rotate. The operation sprocket 16 can be rotated by rotating the operation shaft 20 for each bracket 23, and this is transmitted to the sprocket 15 by the chain 17 so that the pitman arm 11 is in the same direction as the rotation operation direction of the steering lever 26. It is forced to rotate.
[0046]
As shown in FIGS. 6 to 8, a lock shaft 32 that penetrates the rotating bracket 23 up and down and is rotated around the vertical axis e by the lever 31 is provided at the bottom of the balance arm 24. Equipped with a lock claw 33 provided at the upper end of the lock shaft 32, which can be switched between a locked state where the lock claw 33 engages with the upper surface of the rotating bracket 23 and a lock released state where the lock claw 33 faces the central space of the rotating bracket 23. It is configured. Accordingly, when the steering shaft 26 is stowed and retracted and the linkage between the operating shaft 20 and the operating sprocket 16 is cut off, as shown in FIG. It is impossible to rotate 24 in the operation shaft pulling direction. During normal boarding operation, the steering lever 26 is stowed and stored in this manner and locked, so that even if the pitman arm 11 is rotated left and right by the steering handle 10, the operation sprocket 16 is idle. The operation shaft 20 is not reversely operated simply by doing this.
[0047]
When the aircraft is put in and out of the field through a relatively steep slope as shown in FIG. 10 or when the aircraft is loaded and unloaded on a truck bed using a step board, the front and rear inclination of the aircraft is When maneuvering in a larger state, the balance arm 24 is unlocked by the lever 31 and the steering lever 26 is tilted forward to the set angle α or more as described above to operate the operating shaft 20 and the operating sprocket. 16, the operator standing on the ground in front of the aircraft swings the steering lever 26 to the left and right to forcibly rotate the pitman arm 11 and move the traveling aircraft 3 at an extremely low speed. Can be steered in the direction of Further, when the disk 28 comes into contact with the lower surface of the operation sprocket 16, the steering lever 26 cannot be further tilted. In this state, the steering lever 26 is pushed down to transmit the force to the front of the aircraft, and the traveling vehicle 3 You can maneuver while preventing the front from lifting.
[0048]
As shown in FIGS. 6 and 9, a check pin 35 protrudes rearward from the upper end of the operation shaft 20, and a V-shaped guide recess 37 is formed in the check fitting 36 provided on the fuselage side. When the steering lever 26 is stood and retracted while the operating shaft 20 is slid downward, the steering lever 26 is in a posture in which the steering lever 26 faces immediately before the aircraft, that is, the pitman arm 11 goes straight forward. 26 is stood up and stored.
[0049]
The following structure is provided to stop the traveling machine body 3 when the steering lever 26 is used for steering from the ground. That is, as shown in FIG. 4, the main clutch pedal 41 is provided at the left front portion of the driving step 40 in the traveling body 3, and the pair of left and right steering pedals 42 are provided at the right front portion of the driving step 40. The steering pedal 42 and the left and right side clutches and brakes 43 provided in the rear transmission case 9 are independently linked by a rod 44. A main clutch lever 45 extends forward from the main clutch pedal 41 so that the main clutch pedal 41 can be manually cut from the front of the machine body. Further, a linkage shaft 46 that is rotated in conjunction with the clutch disengagement operation of the main clutch pedal 41 is horizontally mounted, and a linkage bracket 48 in which the right end of the linkage shaft 46 and the left and right steering pedals 42 have a long hole interchange 47. When the main clutch pedal 41 is disengaged, the left and right steering pedals 42 are operated in the depression direction via the linkage bracket 48, and the left and right side clutches and brakes 43 are simultaneously operated. Aircraft stop operation is performed. The main clutch pedal 41 can be locked and fixed at the depressing operation position by the lock lever 49, and is used when the main clutch pedal 41 is stopped in an inclined state.
[0050]
A loop-shaped handle portion 26a is formed at the tip of the steering lever 26, and the traveling body 3 is pushed back and forth by holding the handle portion 26a of the tilted steering lever 26. Is easy. Further, the steering lever 26 is pivotally attached to a sighting tool 50 for visually confirming the forward direction of the airframe during planting traveling work. In the state of ground control where the steering lever 26 is laid down forward, The tool 50 is folded back and used. Further, as shown by the phantom line in FIG. 4, during maintenance for opening and closing the engine bonnet 51 and inspecting and maintaining the engine, the sighting tool 50 is raised so that the engine bonnet 51 is locked and held in the open posture. You can also
[0051]
[Other Embodiments]
The present invention can also be implemented in the following forms.
[0052]
(1) For simplicity, the steering lever 26 and the operation sprocket 16 may be always linked.
[0053]
(2) As shown in FIG. 11, an engagement pin 61 that can be inserted into and removed from the balance arm 24 is provided, and a plurality of engagement holes 62 into which the engagement pins 61 are selectively inserted into the rotation bracket 23 are provided with an axis c. And the balance arm 24 and the steering lever 26 are integrated, so that the steering lever 26 can be fixed and used in a plurality of lying postures. According to this, it is possible to maneuver by applying force also in the vertical direction while turning the steering lever 26 laterally.
[0054]
(3) As shown in FIG. 12, a main clutch lever 64 linked to the main clutch pedal 41 via a wire 63 is provided near the handle portion 26a of the steering lever 26, and the handle portion 26a and the main clutch lever are provided. It is convenient to configure so that the aircraft can be stopped by gripping 64 together.
[0055]
(4) As shown in FIG. 13, the operating arm 24a extending left and right from the balance arm 24 and the side clutch / brake 43 of the left and right rear wheels 2 are linked by wires 65, and the steering lever 26 is moved straight. When the front wheel 1 is steered by turning more than a set angle left and right from the position, the rear wheel 2 is stopped by operating the side clutch / brake 43 of the rear wheel 2 which is inside the steer. Well, according to this, it will be possible to maneuver the aircraft more smoothly from the ground. In this case, the steering lever 26 may be operated by turning only the side clutch of the rear wheel 2 when the steering lever 26 is rotated from the straight traveling position to the left or right by a set angle or more.
[0056]
(5) The linkage interrupting mechanism 30 for linking and releasing the steering lever 26 and the operation sprocket 16 may be configured to be switched by a dedicated operation lever or the like.
[0057]
(6) In a model in which the left and right rear wheels 2 are driven via the differential mechanism and the side brake, when the steering lever 26 is rotated from the straight traveling position to the left and right by a set angle or more, the side brake on the rear wheel 2 inside the steering is released. It is also possible to make a small turn by ground maneuvering by braking.
[0058]
(7) The sprocket 15 as a rotating member that rotates integrally with the pitman arm 11 and the operation sprocket 16 as a rotating operation member that is rotated by the steering lever 26 are changed to gears, and the two are intermediate. It is also possible to rotate the pitman arm 11 in the operation direction of the steering lever 26 by meshing with a gear. In addition, the rotating member that rotates integrally with the pitman arm 11 and the rotating operation member that is rotated by the steering lever 26 are each constituted by an arm member, and the steering is also performed by interlocking them with a rod. It is also possible to rotate the pitman arm 11 in the operation direction of the lever 26.
[0059]
(8) As a simple structure, the steering lever 26 is configured to be detachable with respect to the operation sprocket 16, and the operation sprocket 16 is rotated by the attached steering lever 26 only when the steering lever 26 is operated from the ground. The steering lever 26 can be removed and stored during riding.
[Brief description of the drawings]
[Fig. 1] Overall side view of a riding rice transplanter [Fig. 2] Perspective view of the front of the fuselage [Fig. 3] Side view of the front of the fuselage [Fig. 4] Schematic plan view of the aircraft control means [Fig. Expanded side view [Fig. 6] Vertical side view of ground control device [Fig. 7] Plan view of ground control device [Fig. 8] Vertical front view showing part of ground control device [Fig. 9] Part of ground control device FIG. 10 is a side view showing a ground maneuvering state. FIG. 11 is a longitudinal side view of a main part showing another embodiment. FIG. 12 is a main part plan view showing another embodiment of the steering lever. FIG. 13 is a schematic plan view showing still another embodiment.
1 Front wheel 2 Rear wheel
3 traveling machine body 11 pitman arm 15 rotating member 16 rotating operation member 17 interlocking member 26 steering lever (grip operating tool)
30 Linkage mechanism 41 Main clutch pedal 45, 64 Main clutch lever

Claims (7)

The right and left center of the front of the vehicle body (3), provided with grip operation device having a base end portion is pivotally supported swingably around transverse axis (26), the front wheels by the grip operating member (26) (1) is configured to be steerable,
Said grip operating member (26), horizontal position and upright position standing upright in the left-right center of the front, the front end portion of the grip operation member from the upright position (26) swings in front of the vehicle body (3) And can be switched to
Passenger configured to be able to push down the front portion of the traveling machine body (3) via the grip operation tool (26) by pressing the grip operation tool (26) in the lying posture from the ground downward. Ground-operated device for type farming machines. The ground control device for a riding-type agricultural work machine according to claim 1, further comprising a linkage interrupting mechanism (30) for interrupting linkage between the grip operating tool (26) and the front wheel (1). The grip operating member (26) grasping the operating tool in an upright position (26) and the front wheel (1) and becomes the uncoupling state, the grip operating member (26) grasping the operating tool in horizontal position with (26) the front wheel (1 The ground control device of the riding type farm working machine according to claim 2, wherein the linkage interrupting mechanism (30) is configured such that the linkage linkage mechanism (30) is in a linked state. The locking means (31, 33, etc.) for preventing the grip operating tool (26) from switching from a standing posture to a lying posture swinging forward is provided. The ground control device of the riding type agricultural working machine as described. The main clutch lever (45) extended from the main clutch pedal (41) is configured to be manually operable from the ground, and the rear wheel (2) is braked in conjunction with the turning operation of the main clutch lever (45). The ground control device for a riding-type agricultural work machine according to any one of claims 1 to 4, wherein the ground control device is configured as described above. The grip operating member includes a (26) The main clutch lever (64), said main clutch lever (64) according to claim 1 to 4 in association with the cutting operation is arranged to brake the rear wheel (2) of The ground control apparatus of the riding type agricultural working machine as described in any one of the above. A pitman arm (11) that steers the front wheel (1), a rotating member (15) that can rotate integrally with the pitman arm (11), and a position on the front side of the traveling body from the pitman arm (11). A rotation operation member (16) that can be rotated right and left, and a linkage member (17) that interlocks and connects the rotation member (15) and the rotation operation member (16).
By rotating the rotation operation member (16) with the grip operation tool (26), the front wheel (1) is moved through the linkage member (17), the rotation member (15) and the pitman arm (11). The ground maneuvering device for a riding type agricultural working machine according to any one of claims 1 to 6, wherein the ground maneuvering device is configured to be steerable.

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