JP2006187255A - Walking type agricultural working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve tilling workability and operability of a rotary apparatus near a levee. <P>SOLUTION: The walking type agricultural working machine is equipped with the rotary apparatus 2 ahead of a pair of right and left traveling apparatuses supporting a machine body 10 and vertically movably with elevating wheels 53a for regulating support height the rotary apparatus 2 from the machine body 10 between the rotary apparatus 2 and the traveling apparatuses. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a walking type farm working machine that cultivates soil by rotating a cultivating claw on a cultivating shaft.

Some rotary tillers include a front wheel and a rear wheel at the front and rear ends of the main body, and a rotary tiller between the front wheel and the rear wheel. (For example, refer to Patent Document 1.)
The rotary tiller has a rotary shaft with a rotary shaft attached to the front end of the casing, a traveling shaft attached to the rear end of the casing, an engine as a driving source attached to the upper end of the casing and above the traveling shaft, and a handle attached to the casing. There are some which have a tilling depth adjusting means for adjusting the tilling depth at the rear end of the casing. (For example, see Patent Document 2.)
Japanese Patent No. 3015821 (FIG. 1). Japanese Patent No. 3595259 (FIG. 1).

  FIG. 5 is a schematic diagram of the rotary tiller of Patent Document 1. The rotary cultivator 100 includes a driving wheel (referred to as “rear wheel”) 105 at a rear end 102 of a mission case 101, a rotary device 106 at a front end 103 of the mission case 101, and swings from the front end 103 of the mission case 101. The moving arm 107 is extended forward, a lifting wheel (referred to as “front wheel”) 108 is provided at the tip of the swing arm 107, and an engine 109 is provided at the upper end 104 of the mission case 101.

  Then, by swinging the swing arm 107 downward about the support pin 110, the front wheel 108 is lowered to the travel position (state shown in the figure). As a result, the tilling claws 106a (... indicates a plurality) of the rotary device 106 can be floated above the cultivated land 112, and the rear wheel 105 and the front wheel 108 can travel.

  On the other hand, when cultivating the cultivated land 112 with the rotary cultivator 100, the swing arm 107 swings upward as shown by the arrow a with the support pin 110 as an axis. As a result, the tilling claws 106a of the rotary device 106 can be lowered to the cultivated land 112 and the cultivated land 112 can be cultivated with the cultivating claws 106a.

  FIG. 6 is a side view of the rotary tiller of Patent Document 2. A resistance rod 41 is provided at the rear of the traveling wheel 21, and the resistance rod 41 is inserted into the cultivated land 35, whereby a reaction force is applied to the rotary device 16 when cultivating the cultivated land 35 with the cultivating claws 18 of the rotary device 16. However, this reaction force can be received by the resistance bar 41. Thereby, it is possible to prevent the tilling claws 18..., That is, the rotary device 16 from floating.

  And by providing the resistance rod 41 behind the traveling wheel 21, the resistance rod 41 can be arranged at a position that is easy to see from the operator, and the entry state of the resistance rod 41 to the cultivated land 35 can be confirmed. The operator can adjust the tilling depth while looking at the resistance bar 41.

  However, in the above-described walking type agricultural working machine (Patent Document 1), since the front wheel 108 is provided in front of the rotary device 106, the area S1 between the front wheel 108 and the rotary device 106 is dead space when the cultivated land 112 is cultivated. It becomes. Therefore, when the front wheel 108 reaches the ridge of the cultivated land 112, the rotary cultivator 100 cannot advance any further, and the rotary device 106 cannot cultivate the area S1. For this reason, there was a problem that it was difficult to perform the tilling work efficiently with the rotary tiller 100.

Further, in the walking type agricultural working machine (Patent Document 2), since the resistance rod 41 is attached to the rear end 13 of the casing and the working depth is adjusted by the reaction force applied to the rotary device 16, the working depth is adjusted by the softness of the farm field. There is a problem that it is difficult to maintain a certain plowing depth in order to perform.
Further, when traveling on the road, there has been a problem that the entire body must be lifted rearward with the resistance rod 41 as a fulcrum in order to lift the rotary device 16 from the road.

  Accordingly, an object of the present invention is to provide a rotary tiller that is easy to use by improving tillage workability and operability.

  According to the present invention, a rotary device is disposed in front of a pair of left and right traveling devices that support an airframe, and a lifting wheel for adjusting a support height of the rotary device relative to the airframe between the rotary device and the traveling device. It is intended to provide a walking type agricultural working machine characterized in that it can be moved up and down.

Since the present invention is configured as described above, a rotary device is disposed in front of a pair of left and right traveling devices that support the aircraft, and the rotary device is supported between the rotary device and the traveling device. Elevating wheels for adjusting the height can be moved up and down, so that the tilling wheels are in the middle of tilling while maintaining a constant plowing depth regardless of the hardness of the field. This eliminates the inconvenience of separately performing tilling work after the portion is generated, and the work efficiency can be improved.
Further, even when traveling on the road, it is possible to perform the work without being forced to take an unreasonable working posture to lift the rotary device from the road.

  Embodiments of the present invention will be described below.

  The walking type agricultural work machine according to the present invention has, as a basic structure, an engine provided in the machine body, a transmission case coupled to the engine, and a pair of left and right axles pivoted to the transmission case via a shaft support member. Support wheels are attached to the outer ends of the two axles, the elevating wheels are arranged in front of the both running wheels, and the rotary device is provided in front of the running wheels, while the various sub work devices are arranged behind the rotary device. A handle (not shown) is detachably attached, and a handle extending rearwardly and upwardly from the machine body is disposed above various sub-work devices.

  Thus, by arranging the lifting and lowering wheels and the rotary device in front of the traveling wheels, the safety of the worker who is walking behind the aircraft while operating the handle is ensured.

  Embodiments of the present invention will be described below with reference to the drawings.

  A shown in FIG. 1 is a walking type farm working machine according to the present invention, and the walking type farm working machine A includes a rotary tiller 2 as a main working device.

  As shown in FIG. 1, the agricultural machine main body 1 has an engine 11 mounted on a machine body 10, and a drive case 12 connected to the lower part of the machine body 10, and the drive case 12 faces rearward and downward. A mission case 13 that extends and a transmission case 14 that extends forward and downward from the upper portion of the mission case 13 are integrally formed, and a pair of left and right axles 15, 15 are connected to the lower portion of the mission case 13. While attaching the traveling wheels 16, 16, a tilling shaft 17 is provided penetrating in the left-right direction at the tip of the transmission case 14, and a plurality of tilling claws 18 are attached to the tilling shaft 17 to form the rotary tilling portion 2. Yes. In a state where a later-described lifting wheel 53a supported in a bifurcated shape shown in FIG. 2 is raised to the maximum, the lifting wheel 53a is positioned on both sides of the transmission case 14 so as to sandwich the transmission case 14 therebetween. It has been. Accordingly, tillage work and road traveling can be performed stably, and a part of the transmission case 14 is sandwiched when the elevating wheel 53a is moved to the raised position. Can be made large, and the width of the tilling depth adjustment of the rotary tilling part 2 can be sufficiently secured. Moreover, it can support stably by attaching the engine 11 used as the gravity center G between the driving | running | working wheel 16 and the raising / lowering wheel 53a. 19 is a bonnet.

Further, the farm work machine main body 1 is provided with a handle 30 as shown in FIG. 1, and the handle 30 is extended from the upper part of the left and right side walls of the mission case 13 toward the rear upper side. , 31 and a pair of left and right handle bodies 32, 32 that are connected to the rear ends of the handle base bodies 31, 31 and extended rearwardly upward, and between the rear ends of the handle bodies 32, 32. It is formed in a loop shape from a grip portion forming body 33 integrally formed in a frame shape.
A clutch lever 33a is gripped together with the grip portion forming body 33 of the handle 30 so that the operation can be performed while maintaining the power connection state of the clutch mechanism according to the operation position of the operation lever 4 shown in FIG. Can be done.
When the clutch lever 33a is released, the clutch lever 33a is restored to the upright state by the rotation biasing force, and the clutch mechanism is held in the power disconnected state.

  Further, as shown in FIG. 3, at the front center of the handle main body 32, an operation lever 4 that can be tilted up and down and left and right for performing a switching operation between the traveling speed change and the rotary speed change is tilted rearwardly. A switch panel 5 provided with a notch groove portion 5a corresponding to a reverse position R, a tilling position S in a state where the machine is stopped, and a forward tillage F + S which is a tilling in a forward state is attached through handle base bodies 31 and 31. It has been.

  As shown in FIG. 1, the rotary tiller 2 extends a tiller shaft 17 with the tillers 18 attached radially to the left and right sides of a transmission case 14 disposed in the center of the machine body, and the operation lever 4. The rotational power of the engine 11 switched by the switching operation is transmitted from the transmission case 14 to the tilling shaft 17 to drive the tilling claw 18 in the normal direction.

  As shown in FIG. 4, a rotary cover C is formed in front of the transmission case 14 by combining two press plates, and protrudes rearward from a bracket 50 erected at the center of the upper surface of the rotary cover C. A mounting rod 53 is pivotally supported by the arm 52 and is provided so as to pass through the left and right outer sides of the transmission case 14 between the rotary cover C and the traveling wheels 16 and 16. Reference numeral 14 b denotes a guide member for supporting the mounting rod 53 on the transmission case 14. A bifurcated lifting wheel 53a is attached to the tip of the mounting bar 53, and the bifurcated lifting wheel 53a is mounted so as to sandwich the transmission case 14 from both the left and right sides when the mounting bar 53 is at its highest position. It has been.

  Then, the arm 52 is turned up and down by the turning fulcrum 52a provided on the bracket 50 by the switching rod 51 which is linked to the up / down / left / right tilting of the operating lever 4 to change the fixed position of the elevating wheel 53a. It has become.

Since the present invention is configured as described above, by operating the operating lever 4 to the “cultivation position S” of the switching panel 5 and simultaneously grasping the clutch lever 33a and the handle gripping portion forming body 33, the aircraft can travel. In a stopped state, the rotational power of the engine 11 is transmitted from the drive case 12 to the drive shaft 17 through the transmission case 14 to drive the tilling claw 18 in the normal rotation, and the mounting rod 53 of the elevating wheel 53a. In conjunction with the operation of the operation lever 4, the arm 52 rotates clockwise from the state of FIG. 1 via the rotation fulcrum 52 a provided on the bracket 50, so that the lifting wheel 53 a supported in a bifurcated manner is provided. The height is such that the left and right sides of the transmission case 14 are sandwiched and moved to the highest position.
Thereby, it becomes possible to deeply cultivate a specific place in the field by the rotary tiller 2 while the traveling of the machine body is stopped.
When the operation lever 4 is in the neutral position N, the lift position of the lift wheel 53a is maintained.

Further, by operating the operating lever 4 to the “advance tillage position F + S” of the switching panel 5 and simultaneously grasping the clutch lever 33a and the handle 30 gripping portion forming body 33, the traveling of the airframe can drive the rotational power of the engine 11 to the drive case. While the wheels 16 and 16 are rotated from 12 through the transmission case 13 through the axles 15 and 15, the tillage claws 18 are driven to rotate forward by being transmitted from the drive case 12 to the drive shaft 17 through the transmission case 14. 1 and the mounting rod 53 of the elevating wheel 53a is interlocked with the operation of the operation lever 4, and the arm 52 is counterclockwise so that the arm 52 is in the state of FIG. Thus, the tilling operation can be performed while moving forward, and the height of the elevating wheel 53a supported in a bifurcated shape is substantially in the middle position.
As a result, while the aircraft is traveling forward, the rotary cultivating section 2 can be cultivated in a stable posture up to the end by the wheels 16 and 16 and the lifting wheels 53a.

Then, by operating the operating lever 4 to the “advance position F” or “reverse position R” which is the on-road travel shift position of the switching panel 5, the clutch lever 33 a and the handle 30 gripping portion forming body 33 are gripped at the same time. In this travel, the rotational power of the engine 11 is transmitted from the transmission case 14 to the drive shaft 17 so that the airframe is moved forward or backward, and the mounting rod 53 of the elevating wheel 53a is interlocked with the operation of the operation lever 4. The arm 52 is further rotated counterclockwise from the state shown in FIG. 1 via the rotation fulcrum 52a provided on the bracket 50, so that the elevating wheel 53a is at the lowest lowered position.
Thus, when traveling on the road during non-working, the rotary tiller 2 is raised from the ground by the traveling wheels 16 and 16 and the elevating wheel 53a so that the agricultural machine main body 1 can be easily moved. I can do it.

In this embodiment, the elevating wheel 53a is configured to be rotatable up and down in conjunction with the operation of the operation lever 4. However, the interlock can be canceled as necessary.
That is, by removing the pin 52a connecting the switching rod 51 and the arm 52, the elevating wheel 53a can be independently moved up and down to be fixed. In that case, as shown in FIG. By inserting the pin 53b into the plurality of holes 14a provided in the middle from both the left and right sides of the transmission case 14, the position of the mounting rod 53 is fixed and the position of the elevating wheel 53a is fixed. The pin 53b is normally fixed at a position away from the transmission case 14.

It is a side view of the walk type farm work machine concerning the present invention. It is a front view of a bifurcated lifting wheel according to the present invention. It is a principal part top view of a switching panel. It is a principal part side view of a rotary tillage part. It is the schematic of the conventional rotary tiller. It is a side view of the conventional rotary tiller.

Explanation of symbols

2 Rotary tillage part 10 Airframe
16,16 wheel 53a lifting wheel

Claims (1)

  A rotary device is disposed in front of a pair of left and right traveling devices that support the airframe, and a lifting wheel for adjusting the support height of the rotary device relative to the airframe can be moved up and down between the rotary device and the traveling device. A walking-type agricultural machine characterized in that

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