JP2010220575A - Walking type mobile agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type mobile agricultural machine having a rear cover which can cover backward of a rotary tiller for tilling operation, and easily and conveniently carrying out turning operation in switching posture of the rear cover. <P>SOLUTION: The walking type mobile agricultural machine includes: a handle 7 for steering operation, the rotary tiller 4 for tilling operation, the rear cover 18 vertically-movably supported on the rearward of the rotary tiller 4, and is configured that the posture is switchable between a covering posture to cover rearward of the rotary tiller 4 by turning the rear cover 18 to an under position and an opening posture by turning to upper position to make the rear of the rotary tiller 4 open, wherein a switching device which carries out switching of the cover posture between a covering posture and an opening posture of the rear cover 18, is installed at a position apart from the rear cover 18. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a walking-type mobile agricultural machine including a rear cover that can cover the rear of a tillage rotary that performs tillage work.

  2. Description of the Related Art A walking-type mobile agricultural machine that includes a handle that performs a steering operation and a tilling rotary that performs a tilling operation and includes a rear cover that covers the rear of the tilling rotary is conventionally known. The walking-type mobile agricultural machine with this configuration can prevent the cultivation soil, etc., from jumping up behind the tillage rotary with the rear cover, while various devices such as a soil cultivator and tail wheel are detachably placed behind the tillage rotary. When installing, there are cases where the rear cover may become an obstacle, and there is a problem that the rear cover pierces into the soil unexpectedly and the rear cover is damaged when moving backward.

  As an improvement of this problem, the rear cover is supported so as to be able to rotate up and down, and the rear cover is rotated to the lower position to rotate the upper cover from the cover position to cover the rear of the rotary rotary. 2. Description of the Related Art A walking-type mobile agricultural machine shown in Patent Document 1 in which various devices are attached and detached after performing posture switching to an open posture in which the rear of the rotary is opened is known.

JP 2008-307011 A

However, the walking-type mobile agricultural machine described in the above document requires the operator to directly grip the rear cover and perform the rear cover posture switching operation. When performing the rear cover posture switching operation, the tiller rotary is used. There may be cases where other work such as tillage work cannot be performed, and problems remain.
The present invention solves the above-described problems and includes a rear cover that can cover the rear of the tillage rotary that performs the tillage work, and can easily and simply perform the rotation work for switching the posture of the rear cover. It aims at providing a simple walking type mobile agricultural machine.

  In order to achieve the above object, the present invention firstly includes a handle 7 for performing a steering operation and a tilling rotary 4 for performing a tilling operation, and a rear cover 18 can be rotated up and down behind the tilling rotary 4. The rear cover 18 is rotated to the lower position to cover the rear of the tilling rotary 4 and the opening position can be switched to the upper position by rotating to the upper position to open the rear of the tilling rotary 4. In the constructed walking type mobile agricultural machine, a switching operation tool for performing a posture switching operation between the cover posture and the open posture of the rear cover 18 is provided at a position separated from the rear cover 18.

  Second, the switching operation tool is constituted by a shift lever 8 that performs forward / reverse switching or shift operation.

  Third, the switching operation tool is constituted by a switching lever 32 provided along the gripping portion 7a of the handle 7.

  According to the present invention configured as described above, since the posture of the rear cover is switched by the switching operation tool, compared with the case where the operator switches the posture of the rear cover by directly rotating the rear cover up and down. Thus, the rear cover posture switching operation can be performed more easily and easily, and the convenience is improved.

  Further, by configuring the switching operation tool with a shift lever that performs forward / reverse switching or shifting operation, the rear cover posture switching is linked to the forward / backward switching operation or the shifting operation, thereby further improving convenience. There is.

  Furthermore, by configuring the switching operation tool with a switching lever provided along the grip portion of the handle, there is an effect that it becomes easy to perform the posture switching operation of the rear cover while performing the steering operation. .

(A), (B) is the top view and side view of a walking type management machine to which the walking type mobile agricultural machine of the present invention is applied. (A) and (B) are the rear view and side view which show the structure of a back cover and a support mechanism. (A), (B) is the top view and principal part side view which show the structure of a positioning plate. (A), (B) is the top view and side view of a walking type management machine which show another embodiment of this invention.

  1A and 1B are a plan view and a side view of a walking type management machine to which the walking type mobile agricultural machine of the present invention is applied. The illustrated management machine includes a machine body frame 1, an engine 2 fixedly installed (fixed) on the machine frame 1, a fuel tank 3 fixed above the engine 2, and a horizontal tillage driven by engine power. A rotary (cultivation work machine) 4, a handle 7 that is a steering operation tool extended obliquely rearward and upward through a handle frame 6 that protrudes upward from the rear end of the machine body frame 1, and a shift lever that performs a shift operation (Forward / reverse switching lever) 8.

  The airframe frame 1 is constituted by a main frame 9 in the front-rear direction, a mission case 11 that inclines downward from the rear portion of the main frame 9 and the like. A planar U-shaped damper 12 is mounted and fixed on the front end of the main frame 9 and serves as a grip for lifting the management machine. A hitch 13 as a part is extended integrally backward.

  A transmission case 14 is attached and fixed to the side of the engine 2 on the body frame 1, and engine power is transmitted through a transmission belt (not shown) in the transmission case 14 to a transmission mechanism (not shown) in the transmission case 11. ) In addition, the transmission case 14 is provided with a tension clutch (not shown) that includes a tension pulley that adjusts the tension of the transmission belt 14 and that interrupts transmission of engine power to the transmission mechanism.

  The tillage rotary 4 includes a left and right rotary shaft 16 that is inserted and supported in the lower part of the mission case 11 so as to be rotatable in the front-rear direction, and a plurality of tillage claws that are mounted on the rotary shaft 16 and rotate integrally with the rotary shaft. Not). Then, the engine power is transmitted to the rotary shaft 16 through the transmission mechanism, and the tilling rotary 4 is driven to perform the tilling work on the field.

  The top of the tillage rotary 4 is covered with a fender cover 17, and the rear of the tillage rotary 4 is covered with a pair of left and right rear covers 18, 18. The fender cover 17 is a plate-like member that extends integrally from the upper end of the main frame 9 in the horizontal direction, and prevents the cultivation soil from splashing above the body frame 1. The left and right rear covers 18 and 18 are supported by the hitch 13 by the support mechanism 19 so as to be rotatable up and down, and prevent the cultivation soil from scattering to the rear.

  A mounting cylinder 13a extending in the vertical direction is formed at the rear end of the hitch 13, and the resistance is inserted through the mounting cylinder 13a into the soil while traveling on the field to stabilize the posture of the management machine. A rod 21, a cultivator (not shown) for forming a basket on the field, a tail wheel 20 (see FIG. 2) serving as a traveling wheel, and the like are detachably attached. Incidentally, the resistance bar 21 is located between the left and right rear covers 18 and 18 and is configured not to obstruct the vertical rotation of the rear cover 18.

  The left and right handles 7 spread in the shape of a letter C toward the rear in plan view, and the rear part is bent downward with respect to the front part and the middle part facing obliquely upward toward the rear. A grip (gripping portion) 7a is formed at the rear end portion of each handle 7, and a clutch lever 22 is supported in the vicinity of the grip 7a on one of the left and right sides (left side in the illustrated example) so as to be swingable up and down. ing.

  The clutch lever 22 is mechanically coupled to the tension clutch through a linkage mechanism such as a wire, and the tension clutch is connected by a downward swing of the clutch lever 22 brought close to the upper end of the grip 7a in a parallel state. On the other hand, the tension clutch is disengaged by swinging upward of the clutch lever 22 that is separated from the grip 7a and tilts upward toward the rear. The clutch lever 22 is always elastically biased upwardly and can be gripped together with the grip 7a when the clutch lever 22 swings downward. That is, the clutch lever 22 becomes a deadman clutch that engages and operates the tension clutch only during an input operation that swings downward.

  The operator grips the left and right grips 7a to perform a steering operation, and also operates the clutch lever 22 to turn on / off the tillage rotary.

  The transmission lever 8 is formed so as to be able to swing upward and downward obliquely upward from the mission case 11, and a base end portion of the transmission lever 8 is guided to swing in a guide hole 23 a of a guide plate 23 fixed to the side of the handle frame 6. It is inserted as possible. Then, the forward / reverse switching operation and the shift operation are performed via the speed change mechanism by swinging the speed change lever 8 up and down. Specifically, the power is transferred to the reverse position by the downward swing from the neutral position at which the power transmission to the tilling rotary 4 is cut off, the reverse power is transmitted to the rotary shaft 16 via the speed change mechanism, and the management machine is driven backward. On the other hand, the position is switched to the forward position by swinging upward from the neutral position, the normal rotation power is transmitted to the rotary shaft 16 via the speed change mechanism, and the management machine is driven forward. In addition, it is switched to the speed increasing position by further upward swing from the forward moving position, and the power to the forward driving side transmitted to the rotary shaft 16 is increased.

Next, the configuration of the rear cover 18 and the support mechanism 19 will be described with reference to FIGS.
2A and 2B are a rear view and a side view showing the configuration of the rear cover and the support mechanism. The support function 19 includes a horizontal insertion hole 13b drilled in the rear portion of the hitch 13, a bearing 24 inserted and fixed in the insertion hole 13b, and the hitch 13 pivoting back and forth through the bearing 24 in a left-right protruding state. A left and right pivot shaft 26 that is inserted and supported so as to be freely slidable left and right, a positioning plate 27 that is a positioning member disposed on the left and right sides (right side in the illustrated example), and hitch 13 Compression springs (elastic members) 28 disposed on the other side of the left and right sides.

  On the left and right projecting portions of the pivot shaft 26 from the hitch 13, horizontal edge portions (upper and lower ends in the illustrated example) of the square plate-like rear cover 18 are respectively attached and fixed. The rear covers 18 and 18 are configured to rotate up and down integrally with the rotation shaft 26 in the same posture. Further, as described above, since the rotation shaft 26 can slide to the left and right, the rear covers 18 and 18 can be moved to the left and right with respect to the hitch 13.

  The compression spring 28 is externally mounted in a free state on one side (left side in the illustrated example) of a portion protruding left and right from the hitch 13 on the rotation shaft 26. Then, both end portions of the compression spring 28 are in contact with the rear cover and the hitch 13 and always urge the both rear covers 18 and 18 toward the compression spring 28 arrangement side (X1 direction in FIG. 2) in the left-right direction.

  3A and 3B are a plan view and a main part side view showing the configuration of the positioning plate. The positioning plate 27 is attached and fixed to the side surface of the hitch 13 with the rotating shaft 26 inserted in a freely rotating manner, and has three concave portions 27a, 27b, and 27c on the periphery thereof. On the other hand, of the left and right rear covers 18, 18, a left and right positioning pin (positioning portion) 29 protruding to the hitch 13 side is fixed to the rear cover 18 on the positioning plate 27 arrangement side.

  The state of the rear cover 18 is switched by bringing the end of the rear cover 18 on the hitch 13 side into contact with the positioning plate 27 and inserting the positioning pin 29 into any of the three recesses 27a, 27b, 27. . Specifically, by inserting and inserting the positioning pin 29 into the upper limit fixing recess 27a, which is a recess positioned on the front side of the peripheral edge of the positioning plate 27, the rear covers 18, 18 are moved to the upper limit fixing position A ( 2B), the positioning pin 29 is fitted and inserted into the lower limit fixing recess 27b, which is a recess located on the rear side of the peripheral edge of the positioning plate 27. The rear covers 18 and 18 are in the lower limit fixed state in which they are positioned at the lower limit fixing position B (see FIG. 2B), and on the lower side between the upper limit fixing recess 27a and the lower limit fixing recess 27b on the periphery of the positioning plate 27. The rear cover 1 between the upper limit fixing position A and the lower limit fixing position B is inserted into the rotation allowing recess 27c, which is a recess, in a state where the positioning pin 29 is allowed to move. , The rotation allowing state in which the upper and lower pivot 18 is allowed.

  Further, since the rear cover 18 is always urged to the side to be brought into contact with the positioning plate 27 by the compression spring 28, the rear cover 18 and the positioning plate 27 are usually in contact with each other, and the positioning pin 29 is provided with the above three pins. It is inserted into any one of the recesses 27a, 27b, and 27c, and enters any one of an upper limit fixed state, a lower limit fixed state, and a rotation allowable state. Then, against the elastic force of the compression spring 28, the left and right rear covers 18, 18 are displaced to the side where the compression spring 28 is not disposed in the left-right direction (X2 direction in FIG. 2), and the rear cover 18 is free. By changing the state to a state in which it can be rotated up and down, the state is switched to any one of the upper limit fixed state, the lower limit fixed state, and the rotation allowable state.

  Note that, in the rotation-permitted state, the rear cover 18 is vertically rotated by a switching operation tool provided at a position separated from the rear cover 18. Then, the rear cover 18 is rotated to the lower position by the up-and-down rotation operation to cover the rear of the tilling rotary 4 and the open position to be rotated to the upper position to open the rear of the tilling rotary 4. The management machine is configured so that the attitude can be switched.

Next, the configuration of the switching operation tool will be described with reference to FIG.
In the example shown in FIG. 1, the switching operation tool is the speed change lever 8, and the speed change lever 8 and the rear cover 18 are mechanically connected by a linkage mechanism 31 made of a wire or the like. Specifically, when the shift lever 8 is switched to the reverse position, the rear cover 18 is switched to the open position, while the shift lever 8 is switched to the neutral position, the forward position, or the acceleration position. At this time, the linkage mechanism 31 is configured so that the rear cover 18 is switched to the cover posture.

Next, based on FIG. 4, a different part from the above-mentioned Example is demonstrated about another embodiment of this invention.
4A and 4B are a plan view and a side view of a walking type management machine showing another embodiment of the present invention. In the same figure, it shows about the example which comprised the said switching operation tool with the switching lever 32 installed in the handle 7 by the side of the clutch lever 22 in the state along the grip 7a.

  The switching lever 32 is mechanically connected to the rear cover 18 via the linkage mechanism 31, and the rear cover 18 is brought into the open posture by the upward swinging of the switching lever 32 brought close to the lower end side of the grip 7a in a parallel state. On the other hand, the rear cover 18 is switched to the cover posture by the downward swing of the switching lever 32 that is separated from the grip 7a and tilts downward toward the rear. The switching lever 32 is always elastically biased downward and can be gripped together with the grip 7a when the switching lever 32 swings upward. That is, the rear cover 18 is switched to the open posture only during the switching operation for swinging the switching lever 32 upward, and in other cases, the rear cover 18 is switched to the cover posture.

  Note that the posture switching operation of the rear cover may be performed by rotating the rear cover up and down with an actuator such as a motor without mechanically connecting the switching operation tool.

4 tillage rotary (cultivation work machine)
7 Handle (steering control tool)
7a Grip (grip)
8 Shift lever (forward / reverse switching lever)
18 Rear cover 32 Switching lever

Claims (3)

  A steering wheel (7) for performing a steering operation and a tilling rotary (4) for performing a tilling operation are provided. A rear cover (18) is supported on the rear of the tilling rotary (4) so as to be vertically rotatable. ) To a lower position to cover the rear of the tilling rotary (4) and an open position to rotate the upper position to open the rear of the tilling rotary (4). The walking-type mobile agricultural machine provided with a switching operation tool for performing a posture switching operation between the cover posture and the open posture of the rear cover (18) at a position separated from the rear cover (18).   The walking type mobile agricultural machine according to claim 1, wherein the switching operation tool is constituted by a shift lever (8) for performing forward / reverse switching or shifting operation.   The walking type mobile agricultural machine according to claim 1, wherein the switching operation tool is constituted by a switching lever (32) provided along a grip portion (7a) of a handle (7).

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