JPH0748962B2 - Traveling equipment for mobile farm work equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a traveling device for a mobile agricultural work machine,
It can be used as a seedling planter or seeding device.

Conventional technology In a conventional seedling planter, a detection float that slides on the soil surface touches the ground, and the ground contact pressure with this soil surface moves the detection float up and down to detect the depth of the soil. In conjunction with the vertical movement due to the vertical movement, the relative vertical movement maintaining position of the traveling wheels and the traveling vehicle body is changed, and the traveling vehicle body is held at a substantially constant position with respect to the soil surface for seedling implantation, or When turning the seedling planting machine at the ridge during this seedling planting work,
In the state where the relative position between the traveling wheel and the traveling vehicle body is the most opened, that is, the traveling vehicle body is fixed to the uppermost position with respect to the traveling wheel to perform turning.

Problems to be Solved by the Invention For example, in a seedling planting machine, the ground contact of the detection float with the soil surface causes the detection float to move up and down due to the ground contact pressure with the soil surface to detect the depth of the soil. Then, in conjunction with this detection, the relative vertical movement maintaining position between the traveling wheels and the traveling vehicle body is changed, and the traveling vehicle body is held at a substantially constant position with respect to the seedling planting soil surface. The seedlings loaded in the plant are separated by a seedling planting device and planted. When turning the seedling planting machine at the edge of the seedling planting work, the seedling planting machine that fixes the traveling vehicle body to the uppermost position with respect to the traveling wheel is At the time of turning at the ridge, since the traveling vehicle body is fixed to the uppermost position with respect to the traveling wheels, the center of gravity of the seedling planter is at a high position,
As a result, the balance of this seedling planting machine may become unbalanced and it may be difficult to turn around the ridge.

Means for Solving the Problems In order to solve the above problems, the present invention provides traveling wheels (1).
A detection float (3) is provided below the traveling vehicle body (2) having the above to detect the soil depth while sliding vertically on the soil surface soil surface while sliding up and down by the sliding contact pressure with the traveling soil surface.
The traveling wheel (1) is moved by the vertical movement of the detection float (3).
In a mobile agricultural work machine provided with an up-and-down control device (4) for moving the vehicle up and down to bring the traveling vehicle body (2) to a substantially constant position with respect to the soil surface, the up-and-down control mechanism (4) includes a detection float ( 3) Regardless of the vertical position of the vehicle body, the traveling wheel (1) is moved downward to raise the traveling vehicle body (2) to raise the traveling vehicle body (a) and the stop position (b) to stop the traveling vehicle body (2) from rising. And a control lever (c) for moving the traveling wheel (1) in the vertical direction by the vertical movement of the detection float (3) to bring the traveling vehicle body (2) to a substantially constant position with respect to the soil surface (c). 33) is provided, and when the raising / lowering lever (33) is operated to the vehicle body raising position (a), the raising / lowering lever (33) is moved downward from the vehicle body raising position (a) by the downward movement of the traveling wheel (1). Coupling machine that changes to (B) and stops the rising of the traveling vehicle body (2) (37) (47) is provided,
The linkage mechanism (37) (47) includes a traveling vehicle body (2) by changing the timing of changing the raising / lowering lever (33) from the raising position (a) of the traveling wheel (1) to the control stop position (b). ) Is provided with a lift position setting mechanism (6) for changing and setting the lift position.

Advantageous Effect of the Invention In the present invention, the vertical control mechanism (4) raises the traveling vehicle body (2) by moving the traveling wheel (1) downward regardless of the vertical position of the detection float (3). Position (a)
By moving the traveling wheel (1) up and down by the stop position (b) for stopping the ascending of the traveling vehicle body (2) and the vertical movement of the detection float (3), the traveling vehicle body (2) is almost moved to the soil surface. A raising / lowering lever (33) that can be operated is provided at a control position (C) for keeping it at a fixed position, and when the raising / lowering lever (33) is operated to the vehicle body raising position (A), the traveling wheel (1) is moved downward. Coupling mechanisms (37) and (47) for stopping the lifting of the traveling vehicle body (2) by changing the lifting lever (33) from the vehicle body raising position (a) to the control stop position (b) are provided, and the linkage mechanism (37).
(47) is a lifting lever (3
Since the raising position setting mechanism (6) for changing and setting the raising position of the traveling vehicle body (2) is provided by changing the timing of changing 3) from the vehicle raising position (a) to the control stop position (b), For example, when the vehicle body is turned at the edge, the ascending position of the traveling vehicle body (2) is selected by the ascending position setting mechanism (6) according to the conditions of the field, and the detection float (3) detects mud or dirt on the soil surface. It is possible to raise and stop the traveling vehicle body (2) to an optimum position where muddy water is not pushed, and the traveling vehicle body (2) will not be raised more than necessary, so the position of the center of gravity of the aircraft is higher than necessary. It can be easily and efficiently turned on the edge of the ridge.

Then, after raising and stopping the traveling vehicle body (2) to an optimum position, the elevating lever (33) is automatically changed to the stop position (b) for stopping the raising of the traveling vehicle body (2) to move up and down. Since the operating relationship between the lever (33) and the up-down control mechanism (4) is the same, for example, when performing repair work or the like while stopping the engine with the traveling vehicle body (2) raised, traveling wheels ( If the drive mechanism that moves 1) downward is a hydraulic device, pressure oil will leak and the aircraft will descend when the engine is stopped, but even if the engine is started again, the lifting lever (33)
Is in the stop position (b), it is safe because the aircraft does not suddenly rise.

Embodiment In the illustrated example, the seedling planting machine (7) is provided with a traveling transmission case (8) at the front of the traveling vehicle body (2), and a prime mover mount (9) is provided at the front of this traveling transmission case (8). ) Is provided, the prime mover (10) is mounted on the upper side of the prime mover mount (9), and a planted transmission case (11) is provided at the rear of the traveling vehicle body (2). In this configuration, a handle (12) is provided so as to be inclined rearward in the vertical direction, and a base is fixed to the planted transmission case (11).

A base of a chain case (14) having arms (13) projecting upward is rotatably pivotally attached to the left and right sides of the travel transmission case (8), and travels at the rear end of the chain case (14). The wheels (1) are mounted so as to interlock. A seedling planting device (15) that swings up and down via a crank mechanism is provided on the lower left and right sides of the planted transmission case (11), and the upper side of the handle (12) is aligned with the handle (12). A seedling table (16) which is arranged in a tilted manner and movably supported in the left-right direction. The seedling table (16) is moved to a reciprocating mechanism provided in the planted transmission case (11). And a structure in which they are connected via an arm,
Further, the seedling insertion device (1
5) and a clutch for driving and stopping the seedling table (16) and the like.

The traveling wheels (1), (1) below the traveling vehicle body (2)
A detection float (3) is disposed between the detection float (3), a rear portion of the detection float (3) is rotatably supported by a shaft provided laterally from the handle (12), and a front portion thereof is the prime mover mount (9). The detection float (3) is vertically rotatable through a link to a shaft provided in the lower part so that the detection float (3) is elastically downward, and a vertical control device (4) is provided above the traveling transmission case (8). Provided,
This vertical control device (4) comprises a hydraulic pump, a hydraulic switching valve (17), a valve arm (18), a hydraulic cylinder (19) and a piston (20). Secure the L-shaped valve arm (18),
One end of the valve arm (18) and the detection float (3)
A connecting rod (21) is provided between the connecting rod and the piston, and a supporting rod (22) and a wire receiving metal (23) are provided at the end of the piston (20). The supporting rod (22) and the chain case. (1
A connecting rod (24) is provided between the end (4) and the end of the arm (13) for connection.

When the detection float (3) moves upward, the connecting rod (21)
Also, the hydraulic pressure switching valve (17) is rotated through the valve arm (18) to switch to the oil feeding side, and oil is fed from the hydraulic pump into the hydraulic cylinder (19) to the piston (20).
The supporting rod (22) and the connecting rod (24)
The traveling case (1), (1) is lowered by rotating the chain case (14) downward via the hydraulic pressure, and conversely, when the detection float (3) moves downward, the hydraulic pressure is lowered. The switching valve (17) rotates to switch to the oil drain side, the oil in the hydraulic cylinder (19) is drained into the hydraulic pump, and the piston (20) is pulled in to the chain case (14). ) Is rotated upward to raise the traveling wheels (1) and (1).

A lift position setting mechanism (6) is provided on the upper and lower control devices (4), and the lift position setting mechanism (6) has an L-shaped receiving bracket (25) ( twenty five)
And an operating plate (27) is provided on the upper part of the arm (26) projecting upward from the planted transmission case (11). The operating plate (27) has a vertical groove and a rising position setting lever (28). The horizontal groove for fixing the vertical position is provided at an appropriate interval in the vertical direction, and the front end of the rising position setting lever (28) has a side view L.
It has a configuration in which it is pivotally supported between the metal fittings (25), (25) as a letter shape, and the rear end portion is inserted into the groove of the operation plate (27). A wire (3) whose outer front end is received by the wire receiving metal (23) is provided at the tip of the L-shaped side view of the front end of the ascending position setting lever (28).
7) The front end of the inner wire is attached.

However, if the operating portion at the rear end of the rising position setting lever (28) is adjusted up and down along the operation plate (27), the inner part of the front end of the rising position setting lever (28) that is L-shaped in side view will be displayed. The wire front end attachment is adjusted in the front-back direction. Then, the distance between the inner wire front end mounting portion of the L-shaped side view of the front end portion of the lift position setting lever (28) and the wire receiving metal (23) that receives the outer front end changes. Due to this change in the distance, for example, when the inner wire front end mounting portion of the L-shaped side view of the front end portion of the lift position setting lever (28) is adjusted rearward as shown by the solid line in FIG. The inner wire is pulled at the position of the piston (20) in FIG. 1 and the lifting operation lever (33) is returned from (a) to (b). Next, when the raising position setting lever (28) is operated as indicated by the phantom line in FIG. 1, the inner wire front end attachment portion of the L-shaped side view of the front end portion thereof is adjusted forward. , The inner wire is pulled in front of the position of the piston (20) in FIG. 1, and the lifting operation lever (33) is returned from (a) to (b).

A box-shaped operation case (29), which is fan-shaped in a side view, is fixed to the central portion above the handle (12), and a shaft (30) is fixed to the operation case (29). ) Inside the shaft (30), the main operation lever (31) for starting and stopping the traveling drive of the seedling planting machine (7) and the clutch in the planting transmission case (11) are operated and stopped. It has a configuration in which an insertion lever (32) and a raising operation mechanism (5) for performing the same are rotatably provided, and the raising operation mechanism (5) has an arm in front of a turning fulcrum of a lifting operation lever (33). (34), (35)
And a leaf spring (38) for pushing the elevating lever (33). A wire (36) is provided between the arm (34) and the other end of the valve arm (18). The outer case of the wire (36) is connected to the operation case (2
It is configured to be supported between a bottom plate of 9) and an outer bracket provided so as to project upward from the traveling vehicle body (2), and the arm (35) and the rising position setting lever (28) are L-shaped. A wire (37) is provided to connect to the end of the wire (37), and the outer of the wire (37) is supported between the bottom plate of the operation case (29) and the wire receiving metal (23). Is.

When the raising / lowering operation lever (33) is operated to the (c) side in the groove provided in the operation case (29), the detection float (3)
The hydraulic switching valve (17) is rotated by the vertical movement of
The traveling wheels (1) and (1) move vertically.

When the raising / lowering operation lever (33) is operated to the ((a) side in the groove provided in the operation case (29), the hydraulic pressure switching valve (17) is rotated to move the traveling wheel (1), (1)
Is configured to descend, and when the raising / lowering operation lever (33) is operated to the (b) position of the groove, the hydraulic pressure switching valve (17)
Rotation is fixed, and the traveling wheels (1), (1) are fixed at a raised position, and the raised position setting lever (28) is set according to the depth of soil in the seedling planting field. To select the most suitable position to raise the traveling vehicle body (2) and operate the lift control lever (33) to the groove (a) side to switch the valve (17).
Rotates, the piston (20) projects rearward and the traveling wheel (1) moves downward. At this time, the piston (20) projects rearward and the inner wire of the wire (37) is pulled. And the lifting operation lever (33) are automatically moved to the groove (b) side, the rotation of the hydraulic pressure switching valve (17) is fixed, and the traveling wheels (1) and (1) are selected. When it descends to a predetermined position, the descent is stopped and fixed.

The rotation of the prime mover (10) detects the main operation lever (31), the insertion lever (32), and the rising position setting lever (28) of the rising position setting mechanism (6) when swiveling depending on the depth of the seedling-inserting soil. When the float (3) is operated by selecting a predetermined position that does not push mud, and when the raising / lowering operation lever (33) of the raising operation mechanism (5) is moved to the (c) position of the operation case (29), the seedling planting machine (7) is rotationally driven, the traveling wheels (1), (1) are rotationally driven, the seedling planting machine (7) is in progress, and the detection float (3) is grounding and sliding, and the planted transmission case The seedlings loaded in the seedling mounting table (16) that moves left and right by (11) are separated from the seedling take-out port by the seedling planting device (15) and are planted on the soil surface leveled by the detection float (3). During the seedling planting work, the detection float (3) slides while moving up and down depending on the depth of the soil, so that Detecting a force detection float (3) moves upward by detecting a high pressure becomes deeper the depth of the soil, the connecting rod (21) and a valve arm (1
8) The oil pressure switching valve (17) is turned through to switch to the oil feeding side, and oil is fed from the hydraulic pump into the hydraulic cylinder (19) to cause the piston (20) to project and the support rod (22). And the chain case (14) is rotated downward via the connecting rod (24) to lower the traveling wheels (1), (1),
When the upward movement of the detection float (3) is stopped, the hydraulic pressure switching valve (17) is switched to the shutoff side, the descent of the traveling wheels (1), (1) is stopped, and the traveling vehicle body (2) is stopped. The seedlings are planted while being held at a substantially constant position with respect to the soil surface.

In contrast to the above, when the soil surface becomes shallow, the detection float (3) detects a low pressure and moves downward, and the hydraulic pressure is transferred via the connecting rod (21) and the valve arm (18). The switching valve (17) is rotated to switch to the oil drain side, the oil is drained from the hydraulic cylinder (19) into the hydraulic pump and the piston (20) is retracted, and the support rod (22) and the When the chain case (14) is rotated upward through the connecting rod (24) to raise the traveling wheels (1), (1) and the lowering of the detection float (3) is stopped, the hydraulic pressure is reduced. Switching valve (1
7) is switched to the shutoff side, and the traveling wheels (1),
The raising of (1) is stopped, the traveling vehicle body (2) is held at a substantially constant position with respect to the soil surface, and seedlings are planted.

When turning the seedling planting machine (7) at the edge of the ridge, if the elevating lever (33) of the raising operation mechanism (5) is operated to the (a) side of the groove of the operation case (29), The hydraulic pressure switching valve (17) is rotated through the valve arm (18) to switch to the oil feeding side, and the hydraulic pump feeds oil into the cylinder (19) to cause the piston (20) to project. , The supporting case (22) and the connecting rod (24) are used to rotate the chain case (14) downward to lower the traveling wheels (1), (1), but the piston (20) ) Protrudes to the predetermined position selected by the raising position setting lever (28), the lifting operation lever (33) is automatically moved to the (b) position of the groove of the operation case (29) via the wire (37). The vertical movement lever (33) is switched to the (b) side of the groove. Then, the hydraulic pressure switching valve (17) is switched to the shut-off side to stop the descent of the traveling wheels (1), (1) and reach the predetermined position selected by the raised position setting lever (28). The traveling wheel (1),
Fix (1).

Since the raising operation mechanism (5) and the raising position setting mechanism (6) are provided when the seedling planting machine (7) is turned at the edge, the traveling is performed in advance depending on the soil depth of the seedling planting field. When the ascending position of the vehicle body (2) is selected, the traveling vehicle body (2) automatically stops when the traveling vehicle body (2) ascends to the selected predetermined ascending position. Therefore, the traveling vehicle body (2) may ascend more than necessary. Since it does not exist, the turning of the seedling planting machine (7) becomes easy.

Incidentally, to explain another embodiment shown in FIG. 4, FIG. 5 and FIG. 6, the detection floats (3), (3) are provided on the left and right sides of the lower part of the prime mover mount (9). The detection floats (3), (3) rear portions are rotatably supported by a shaft provided laterally from the traveling vehicle body (2), and the connecting rod (21) is provided between the front portion and the valve arm (18). Ground leveling floats (39), (39), (39) are provided between the traveling wheels (1), (1) below the traveling vehicle body (2) and outside thereof. , (39), (39) rear parts are rotatably supported by shafts provided laterally from the handle (12), and front parts of the outer leveling floats (39), (39) are the planted transmission case. (11) is rotatably supported by a shaft provided laterally via a link, and the front part of the leveling float (39) in the central portion is rotated to the traveling vehicle body (2) through the link. It is freely pivoted configuration.

The hydraulic cylinder (19) and the piston (20) of the vertical control device (4) are provided on the left and right sides of the upper part of the prime mover mount (9), and the piston (20) and the chain case (14) are The arm (13) is connected separately to the left and right, a long hole (40) is provided at the center of the arm (13), and the arm (41) is rotatably provided at the end of the hydraulic cylinder (19). And the hydraulic pump and the hydraulic switching valve (17) of the vertical control device (4) are provided on the left and right sides of the upper portion of the traveling transmission case (8), and the valve arm (18) and the arm are provided. A wire (42) is provided between the elongated hole (40) of (13) and the wire (42) is connected.
The outer of is supported between the support rod (43) projecting forward from the vertical control device (4) and the lower end of the arm (41).

The raising / lowering operation lever (33) of the raising operation mechanism (5) is rotatably provided on the shaft (30) of the operation case (29),
The lifting lever (33) is provided with the arm (34),
Between the valve arm (18) and the upper ends of the arms (50) provided on both sides of the rotatable shaft provided on the support rods (51), (51) provided on the traveling transmission case (8). Is provided with a spring (44), the lower end of the arm (50) and the arm (34)
A wire (45) is provided between the operation case (29) and the supporting rod (49) projecting from the traveling vehicle body (2) so that the outer side of the wire (45) is supported by the wire. The operating case (29) is provided with the ascending position setting mechanism (6), and the ascending position setting lever (28) of the ascending position setting mechanism (6) is provided in the operating case (29). A pivot (30) is rotatably supported on the shaft (30), an arm (46) is provided on the lift position setting lever (28), and a wire is provided between the arm (46) and the upper end of the arm (41). (47) is provided and connected, and the outer of the wire (47) is supported between the operation case (29) and the support rod (48) protruding from the hydraulic cylinder (19).

When the raising / lowering operation lever (33) is operated toward the (a) side of the groove of the operation case (29), the detection float (3),
The hydraulic valve (17) is rotated by the vertical movement of (3) to vertically move the traveling wheels (1), (1).

When the elevating operation lever (33) is operated to the (c) side in the groove provided in the operation case (29), the hydraulic valve (17) is rotated, and the traveling wheels (1), (1). When the lifting operation lever (33) is operated to the (b) position of the groove, the rotation of the hydraulic pressure switching valve (17) is fixed, and the traveling wheels (1), ( 1) is fixed at the lowered position.

When the raising position setting lever (28) is operated to an appropriate position in the groove of the operation case (29) by the soil depth of the seedling planting field, one end of the wire (42) is moved to the arm (13).
Is set at a predetermined position of the long hole (40), and the raising / lowering operation lever (33) is set in the groove (C) of the operation case (29).
When operated to the side, the hydraulic valve (17) rotates, the traveling wheels (1), (1) descend, and the end portion of the elongated hole (40) of the arm (13) causes the wire ( When the traveling wheels (1), (1) descend to the position where they come into contact with 42), the traveling wheels (1), (1) stop descending and are fixed.

When turning the seedling planting machine (7) at the edge of the ridge, the raising position setting lever (28) of the raising position setting mechanism (6) is used.
Is operated to select the position of the wire (42) in the elongated hole (40) of the arm (13), and the lifting lever (33) of the lifting operation mechanism (5) is moved to the operation case (29). )
When operated to the (c) side of the groove of, the hydraulic pressure switching valve (17) rotates via the valve arm (18),
Switching to the oil feeding side, oil is fed from the hydraulic pump into the cylinder (19), and the piston (20) is projected,
The chain case (14) is rotated downward to lower the traveling wheels (1) and (1) so that the end of the elongated hole (40) of the arm (13) is aligned with the wire (42). When the traveling wheels (1), (1) descend to the contact position, the traveling wheels (1), (1) are individually descended so as to stop and fix the traveling wheels (1), (1). , (1) is stopped when it descends to the selected position, which facilitates turning.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a partial enlarged rear view. FIGS. 4, 5, and 6 are views showing other embodiments,
FIG. 4 is a side view, FIG. 5 is a plan view, and FIG. 6 is a partially enlarged rear view. In the figure, reference numeral (1) is a traveling wheel, (2) is a traveling vehicle body,
(3) is a detection float, (4) is a vertical control device, (5)
Is a raising operation mechanism, and (6) is a raising position setting mechanism.

Claims (1)

[Claims] 1. A detection float for detecting the soil depth while sliding on the soil surface soil surface under the traveling vehicle body (2) having traveling wheels (1) while vertically moving according to the sliding contact pressure with the traveling soil surface. 3) is provided, and a vertical control device (4) for moving the traveling wheel (1) in the vertical direction by the vertical movement of the detection float (3) to bring the traveling vehicle body (2) to a substantially constant position with respect to the soil surface. In the provided mobile agricultural work machine, the up-and-down control mechanism (4) raises the traveling vehicle body (2) by moving the traveling wheel (1) downward regardless of the vertical position of the detection float (3). Position (a) and vehicle body (2)
Stop position (b) to stop the ascending and detection float (3)
The vertical movement of the traveling wheel (1) moves the traveling wheel (1) in the vertical direction to provide a control position (C) that moves the traveling vehicle body (2) to a substantially constant position with respect to the soil surface. When the raising / lowering lever (33) is operated to the vehicle body raising position (a), the lowering of the traveling wheel (1) changes the raising / lowering lever (33) from the vehicle body raising position (a) to the control stop position (b). Link mechanism (3
7) and (47) are provided, and the linkage mechanism (37) (47) changes the lift lever (33) by the downward movement of the traveling wheel (1) from the vehicle body raising position (a) to the control stop position (b). A traveling device for a mobile agricultural work machine, comprising: an ascending position setting mechanism (6) for changing and setting an ascending position of a traveling vehicle body (2) at different timings.