JP3833055B2 - Agricultural machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mainly walk-type farm work machine that performs tillage work and various management work.
[0002]
[Prior art]
Conventionally, this type of farm work machine has a transmission case mounted on a machine body on which an engine is mounted, and supports a pair of traveling wheels via left and right axles on both lower sides of the transmission case, and between these left and right axles and the engine. A clutch mechanism is interposed, and power from the engine is transmitted to each axle via the clutch mechanism, while a handle is provided on the airframe. This handle is generally U-shaped with left and right handle bases extending from the body side and loop-like grips connected continuously to the free ends of the handle bases. A clutch lever for turning on and off the clutch mechanism is supported in a swingable manner near the grip portion.
[0003]
Further, as this clutch lever, a so-called deadman type which is excellent in operability and can be oscillated at any location is used, that is, left and right support portions supported by the handle base portions, A loop-shaped member is used which is continuously connected to the free end side of the support part and has an operation part extending in parallel along the grip part of the handle. The clutch mechanism is turned on and off by gripping the gripping portion of the operating portion provided on the handle and swinging the operating portion toward and away from the grip portion of the handle.
[0004]
[Problems to be solved by the invention]
However, according to the above configuration, the handle and the clutch lever are both in a continuous loop shape, and the operation portion of the clutch lever is provided in parallel to the grip portion of the handle. Will occur. In other words, when working or traveling, the operator grasps the grip part of the handle with one hand and steers the aircraft while grasping the grip part of the operation part provided on the clutch lever with the other hand. The clutch mechanism is turned on and off by swinging the clutch lever toward and away from the handle part of the handle. At this time, if any part of the handle part is grasped, Even when the clutch lever is swung by gripping any part of the grip portion, when the clutch lever is swung to the grip portion side, the grip portion and the grip portion of the clutch lever overlap each other, that is, overlap each other. Since the hand grasping the grip portion is in the way, it is impossible to perform a reliable swinging operation to the grip portion side of the clutch lever. At this time, once the hand is released from the grip portion of the handle, the swing operation to the grip portion side of the clutch lever can be performed, but in such a case, the steering of the airframe becomes unstable. .
[0005]
An object of the present invention is to reliably perform the on / off operation of the clutch mechanism by swinging the clutch lever to the grip portion side with the other hand without being obstructed by one hand grasping the grip portion of the handle. It is to provide an agricultural machine that can.
[0006]
[Means for Solving the Problems]
To achieve the above object, the present invention includes a vehicle axis which engine or these power is transmitted via the clutch Organization, and airframe supporting the axle, extends to said machine body or al rear side comprising a handle having a grip portion connecting the left and right handle root portions及 beauty free end of the handle source unit, and a clutch levers to turn on and off the clutch Organization is held in the handle, said clutch lever over is extended along the grip, close against the該握Ri unit, in agricultural machine gripper which polymerize the grip on the operating unit capable separated is are formed, the clutch levers are A pair of independent first and first parts that are supported by left and right handle bases, are front sides of the grip part, and are non-overlapping parts where the grip part and the operation part do not overlap at the center part in the left-right direction of the grip part. The second lever body and the first and second lever bodies; First and second lever body supporting side of the dollar source unit is characterized in that a coupling member which is connected so as to be integrally rotatable.
[0007]
[Action and effect of the invention]
During work or during movement traveling, while grasping the operator to grip the handle with one hand, while gripping the grip portion of the operating portion provided on the clutch levers with the other hand, the clutch levers of handle close against the grip portion, by swinging in the leaving direction, on-off operation of the clutch Organization is performed. And at this time, the clutch lever is supported by the left and right handle bases, is on the front side of the grip portion, and the non-overlapping portion where the grip portion and the operation portion do not overlap at the center in the left-right direction of the grip portion A pair of independent first and second lever bodies and a support side of the first and second lever bodies to the handle base so that the first and second lever bodies can rotate together. hand due to the provision of a the connecting body, in the non-overlapped portion, without the grip portion of the gripping portion and the handle of the clutch levers are polymerized i.e. overlapping, the grip portion at the non-overlapped portion the by performing swing operation of the position is allowed by the clutch levers, without hands to grasp the grip portion in the way, the swing operation to grip the side of the clutch levers can be reliably performed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a walking type management machine as a preferred embodiment of the present invention. This management machine has a rotary tiller 2, an engine 3 as a drive source, from the front side to the rear side of the body 1, A transmission case 5 to which rotational power from the engine 3 is transmitted via a main clutch mechanism 4 described later, and a pair of traveling wheels 6 and 6 supported on both sides of the lower side of the transmission case 5 via left and right axles 61 and 61. Are arranged sequentially. Further, a handle 7 is extended on the rear side of the body 1. Then, by arranging a pair of traveling wheels 6 via the left and right axles 61 between the operator who grasps the handle 7 and the tilling device 2, the safety of the operator can be ensured.
[0009]
The rotary tilling device 2 includes a tilling shaft 20, a tilling claw 21 composed of four splints, a substantially semicircular rotary cover 22 covering its outer periphery, and a residual tillage treatment device 23 that enters the soil. It has.
[0010]
The engine 3 also includes a pair of input / output pulleys 31 and 32 housed in a transmission case 30, a belt 33 stretched between the pulleys 31 and 32, and a tension arranged to face the belt 33. The power is transmitted to the input shaft E of the transmission case 5 through the main clutch mechanism 4 having the rollers 40, and rotational power is transmitted from the input shaft E to the axles 61 of the left and right traveling wheels 6 through the internal mechanism of the transmission case 5. Then, these traveling wheels 6 are driven to rotate. In the figure, 35 is an engine cover and 36 is a muffler.
[0011]
In the embodiment of FIG. 1, the transmission case 5 is provided with a rotary case 5 </ b> A that divides and outputs power to the tilling shaft 20 of the tilling device 2. Are arranged substantially horizontally along a line connecting the cultivating shaft 20 and the tilling shaft 20. Further, at the foremost position of the airframe 1, a pair of left and right caster-equipped lifting wheels 11 that can be adjusted up and down according to the tillage depth and traveling on the road are swung via a rocking arm 12. I support it as possible.
[0012]
Further, as is apparent from FIG. 5, the clutch mechanism 4 supports the tension roller 40 at the distal end side through a rotation shaft 41 so as to freely rotate, and the base side through the pivot pin 42 to the transmission case 5. A swing arm 43 supported so as to swing back and forth, a first spring 44 comprising a torque spring wound around the outer periphery of the pivot pin 42 on the base side of the swing arm 43, and the swing arm 43 The operation wire 45 is connected to one end in the longitudinal direction and the other end is connected to a clutch lever 8 described later. The first spring 44 has one leg piece engaged with the swing arm 43, and the other leg piece engaged with a handle mounting boss 50a (described later) provided on the transmission case 5, The first spring 44 urges the swing arm 43 so as to always swing forward, and accordingly, the tension roller 40 is moved in the direction of loosening the belt 33 to keep the clutch disengaged. ing. Further, a second spring 46 having a conical shape is attached to the distal end side of the operation wire 45, and the operation wire 45 is connected to the swing arm 43 via the second spring 46. The two springs 44 and 46 return the clutch lever 8 from the engaged state to the disengaged state.
[0013]
The handle 7 has a pair of left and right handle bases 71, 71 whose front base side is coupled and supported to the mission case 5, and a loop-shaped grip part connected continuously to the rear free end side of each handle base 71. 72 and a substantially U shape. In the embodiments shown in the drawings, a cylindrical body 70a is provided on the front end side of each handle base 71 as shown in FIG. 5, and this cylindrical body 70a is inserted and coupled to a handle mounting boss 50a provided in the transmission case 5. In addition, one positioning hole is provided in the middle portion in the longitudinal direction of each handle base 71, while a pin 70b inserted through the positioning hole is provided on the transmission case 5 side with an arc centered on the boss 50a. By providing a plurality of pins on the top and engaging the positioning holes with any one of the plurality of pins 70b, the handle bases 71 and 72 are supported by the bosses 50a so that the angle can be changed. Yes.
[0014]
Further, a clutch lever 8 for turning on and off the clutch mechanism 4 is supported near the grip portion 72 in the handle base portion 71 so as to be swingable in the front-rear direction. Left and right support portions 81 that are swingably supported by the handle base portions 71 via the pivot pins 70, and are connected to the free end sides of the support portions 81, An operating portion 82 that extends in parallel is formed, and a grip portion 83 that is gripped by the operator when the clutch is operated is formed in the operating portion 82.
[0015]
1 and 2, when the clutch lever 8 is positioned substantially upright with respect to the grip portion 72 of the handle 7, the swing arm 43 of the clutch mechanism 4 is moved to the first spring 44. The tension roller 40 is swung forward by the urging force, and the tension roller 40 held by the swing arm 43 is moved in the direction of loosening the belt 33 as shown by the solid line in FIG. 1 and 2, when the clutch lever 8 is positioned in a backward position so as to overlap each other with respect to the grip portion 72 of the handle 7, as shown by the phantom lines in FIGS. By swinging the swing arm 43 backward while resisting the urging force of the first spring 44, the tension roller 40 is pressed against the belt 33 and tensioned as indicated by the phantom line in FIG. , Ku It is to be held in pitch-filled state.
[0016]
In the above configuration, the non-overlapping portion 10 that does not overlap each other is formed on at least one side of the grip portion 72 of the handle 7 and the operation portion 82 of the clutch lever 8. That is, in the embodiment of FIGS. 1 and 2, a notch is formed in the longitudinal direction intermediate portion of the operation portion 82 in the clutch lever 8, and the grip portion of the handle 7 is provided between the operation portions 82 by providing this notch. The non-polymerization part 10 which does not superpose | polymerize with respect to 72 is formed. More specifically, the clutch lever 8 includes a pair of left and right independent first and second lever bodies 8A and 8B having a substantially L shape having a support portion 81 and an operation portion 82, and the lever bodies 8A and 8B. By forming one connecting rod 8C laid between the support portions 81 and supporting each support portion 81 of the lever bodies 8A and 8B to the handle base portion 71 via the pivot pin 70, A non-overlapping portion 10 is formed between the operation portions 82 of the lever bodies 8A and 8B.
[0017]
For example, when plowing work is performed with the above management machine, the operator grasps the non-overlapping portion 10 of the grip portion 72 of the handle 7 with one hand, and the first and second lever bodies 8A with the other hand. , 8B, by gripping one side of the gripping portion 83 provided in the operation portion 82 and swinging it backward, the other side of the lever bodies 8A, 8B is simultaneously swung through the connecting rod 8C. Accordingly, the clutch mechanism 4 can be operated to the above-described clutch engagement state via the operation wire 45 connected to one side of the lever bodies 8A and 8B.
[0018]
In this state, that is, when the first and second lever bodies 8A and 8B are swung backward, the first and second lever bodies 8A and 8B are released when the hand holding the grip portion 83 is released. Is raised again by the urging force of the first and second springs 44 and 46, and the clutch mechanism 4 returns from the engaged state to the disengaged state.
[0019]
At this time, a non-overlapping portion 10 is formed between the operating portions 82 of the lever bodies 8A and 8B so that the operating portion 82 does not overlap with the grip portion 72 of the handle 7. By grasping the grip portion 72 and swinging one side of the lever bodies 8A and 8B, the grip portion 83 of the lever bodies 8A and 8B and the grip portion 72 of the handle 7 are overlapped with each other. Without wrapping, and by extension, the hand gripping the grip portion 72 is not obstructed, the lever body 8A, 8B is released from the clutch disengaged state in which the lever portion 8A is held substantially upright with respect to the grip portion 72. On the other hand, it is possible to reliably perform the swinging operation into the clutch-engaged state where they are superimposed on each other in a superposed manner.
[0020]
Further, the embodiment of FIG. 3 is a reference diagram. In this embodiment , the clutch lever 8 includes left and right support portions 81 and an operation portion 82 that is connected to the free ends of the support portions 81 and extends in parallel with the grip portion 72 of the handle 7. The loop-shaped central portion of the grip portion 72 provided on the handle 7 is bent backward in a U-shape in plan view, and the bending portion 72a and the operation portion 82 of the clutch lever 8 are In the meantime, the non-polymerized portion 10 is formed.
[0021]
Furthermore, the embodiment of FIG. 4 is a reference diagram. In this embodiment , the central portion in the length direction of the grip portion 83 in the operation portion 82 is extended in a U-shape in a plan view toward the front side away from the grip portion 72 of the handle 7. And the non-overlapping portion 10 is formed between the front extending portion of the grip portion 83.
[0022]
Even in the case of each of the above embodiments, by grasping the grip portion 72 of the handle 7 facing the non-overlapping portion 10 and performing the swinging operation while gripping the grip portion 83 of the operation portion 82 provided on the clutch lever 8. The clutch lever 8 can be reliably swung from the clutch-disengaged state to the clutch-engaged state without disturbing the hand grasping the grip portion 72.
[0023]
Further, the transmission case 5 is supported by a transmission lever 9 for switching a transmission mechanism provided therein, and the transmission lever 9 is an operation for operating the transmission mechanism, as is apparent from FIG. A rod 91, a guide rod 92 bent into a crank shape to be inserted into a guide plate, which will be described later, a disk-shaped connecting plate 93 that connects these rods 91 and 92 together, and a free end of the guide rod 92 And an operating rod 95 having an operating portion 94 coupled to the. When the transmission lever 9 is supported by the transmission case 5, as shown in FIGS. 1 and 2, the operation rod 95 is extended in an inclined manner toward the rear upper side through the guide rod 92. Yes. In this case, since the operating portion 94 of the operating rod 95 is positioned near the grip portion 72 of the handle 7, an operator who holds the grip portion 72 and steers the airframe 1 can easily perform the shifting operation. And operability can be improved.
[0024]
Further, as shown in FIGS. 1 and 2, a guide plate 96 into which the guide rod 92 of the transmission lever 9 is inserted is inclined obliquely downward and rearward in the upper rear portion of the transmission case 5. As shown in FIG. 7, the guide plate 96 includes first and second guide grooves 97, 98 in two upper and lower stages, and a communication groove 99 that allows the guide grooves 97, 98 to communicate with each other. The second guide groove 98 is provided with a neutral position, a forward second speed position, and a reverse position, and the first guide groove 97 is provided with a forward first speed position and a work position for rotating the rotary. Further, the working position portion 97a in the first guide groove 97 is inclined obliquely downward. In this case, the shift lever 9 can be smoothly guided to the working position portion 97a of the first guide groove 97, although the guide rod 92 at the intermediate portion of the shift lever 9 is bent upward in a crank shape. However, it is possible to prevent the shift lever 9 from moving freely when the shift lever 9 is positioned at the work position portion 97a.
[0025]
The rotary cover 22 of the tilling device 2 is divided into a semicircular cover main body 22a and a pair of side covers 22b disposed on the left and right sides of the cover main body 22a, and the side cover 22b is divided into the cover main body 22a. It is preferable to attach to the detachable. That is, as shown in FIGS. 8 and 9, the entire cover body 22a is formed into a semicircular shape that curves upward in the front-rear direction, and a plurality of reinforcing ribs 22c extending in the front-rear direction are integrally formed on the upper surface side. At the same time, attachment pieces 22e having a plurality of through-holes 22d are integrally provided on the left and right ends of the cover body 22a. Further, as shown in FIG. 10, the side cover 22b is formed of a semicircular disk having a plurality of through holes 22f facing the through holes 22d of the cover body 22a, and each of the through holes 22d, A side cover 22b is detachably attached to the cover main body 22a by inserting a fixing bolt between 22f and fastening with a nut.
[0026]
In the case of the above configuration, when the tilling claw 21 provided in the rotary cover 22 is replaced with, for example, a spiral rotor, the side cover 22b is removed from the cover body 22a, which is not possible in the past. Accordingly, another attachment such as a spiral rotor can be easily attached, and cleaning and maintenance work in the rotary cover 22 can be easily performed. Further, even when attaching a longer attachment than the rotary cover 22, the side cover 22b is removed from the cover main body 22a, and the semicircular supplement main body part continuous to the left and right ends of the cover main body 22a By attaching another long side cover 22b having a side part extending downward from one end of the supplementary body part, the long side cover 22b can be easily attached, while the long side cover 22b allows the operator to attach the long side cover 22b. It is possible to prevent soil and stones from hitting. In FIG. 8, a plurality of attachment holes 22g are formed in the cover body 22a, and another cover can be attached to the attachment holes 22g.
[0027]
Further, a pair of left and right rotary frames 13 extending in parallel from the mission case 5 toward the front side and constituting a part of the airframe 1 are disposed inside the rotary cover 22. As shown in FIGS. 11 and 12, the frame 13 is composed of plate-like members facing left and right, and a plurality of attachments for attaching the rotary cover 22 and other parts attached to the cover 22 to the upper end portion thereof. A piece 14 is integrally formed, and an engine receiving plate 16 on which a plurality of fixing bolts 15 on which the engine 3 is mounted is projected is fixed to the upper rear side of each rotary frame 13. Each rotary frame 13 is integrally formed with a bent step portion 17 that is bent outwardly on the left and right sides so that the rear side thereof is attached to the transmission case 5 at a wide interval. As described above, by providing the bending step portion 17 in each rotary frame 13, the strength of each rotary frame 13 can be increased, but the vibration resistance can be improved and the stability when the engine 3 is mounted can be improved. Can be increased. In FIG. 12, reference numeral 18 denotes an attachment hole for attaching the rotary frame 13 to the mission case 5.
[Brief description of the drawings]
FIG. 1 is a side view of a management machine shown as an example of an agricultural machine according to the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a plan view schematically showing another embodiment.
FIG. 4 is a plan view schematically showing another embodiment.
FIG. 5 is a side view showing a clutch mechanism.
FIG. 6 is a partially omitted side view showing a clutch transmission lever.
FIG. 7 is a front view of a guide plate for guiding the shift lever.
FIG. 8 is a plan view showing a cover main body of the rotary cover.
9 is a side view of FIG. 8. FIG.
FIG. 10 is a side view showing a side cover of the rotary cover.
FIG. 11 is a plan view in which a part of a rotary frame constituting the airframe is omitted.
12 is a side view of FIG. 11. FIG.
[Explanation of symbols]
1 Airframe 3 Engine 4 Clutch mechanism 61 Axle 7 Handle 71 Handle base 72 Grip part 8 Clutch lever 82 Operation part 83 Gripping part 10 Non-overlapping part

Claims (1)

And car shaft engine or these power is transmitted via the clutch Organization, and airframe supporting the axle, the handle root portions of the left and right extending to said machine body or al rear 及 beauty the handle source unit comprising a handle having a grip portion connecting the free end, and a clutch levers to turn on and off the clutch Organization is held in the handle of the,
It said clutch levers is extended along the grip, close against the該握Ri unit, in agricultural machine gripper which polymerize the grip on the operating unit capable separated is are formed,
Pair the clutch levers is supported on the right and left handle source portion, a front side of the grip, as a non-overlapped portion of the operating portion and the該握Ri part in the left-right direction central portion of the該握Ri portion does not polymerize The first and second lever bodies independent of each other, and the support side of the first and second lever bodies that support the handle base are connected so that the first and second lever bodies can rotate together. An agricultural machine characterized by comprising a body .

Images