JP4157961B2 - Agricultural machine - Google Patents

Description

  In the present invention, the center part in the longitudinal direction is mounted on the rear part of the tractor via a three-point link mechanism so as to be movable up and down, and each of the work machine parts extending to the left and right sides of the central work machine can be folded. The present invention relates to a folding mechanism of a configured agricultural machine.

2. Description of the Related Art Conventionally, there is known an agricultural work machine configured such that each of work machine parts extending to the left and right sides of a central work machine can be folded. For example, “the middle part (4) of the agricultural machine (1) in the longitudinal direction is attached to the rear part of the tractor (T) via a three-point link hitch mechanism so as to be movable up and down, and the central part of the agricultural machine (from the tractor (T) ( 4) The power can be transmitted to 4), and the working machine part (5) extending from the central part (4) to the left and right sides can be folded to the central part (4) side. In the agricultural machine (1), the agricultural machine (1) is divided into a central part (4) and left and right working machine parts (5L, 5R), and the divided central part (4) and left and right work A mode in which a chain transmission case (9) is provided in each of the machine parts (5L, 5R) to enable the work part to be driven, and the center part (4) and the left and right work machine parts (5L, 5R) are all operated. The left and right work machine parts (5L, R) is folded into the backside stack and the center part (4) is used to work, and the left and right work machine parts (5L, 5R) are folded backside to the center part (4). (4) and a publication (Patent Document 1) of “a method of driving a folding farm work machine characterized in that it can be switched to a mode of working with either one of the left and right work machine parts (5L, 5R)”. is there.
Japanese Patent No. 3457497

  In the case of the above-mentioned known folding farm work machine, the left and right work machines extended with respect to the center work machine are folded over at approximately 180 degrees on the back side to be compact and convenient even in the storage state. . However, the extension work machine is rotated almost 180 degrees on the back side with the rotary shaft provided on the side of the central work machine as a fulcrum, and it stands approximately 90 degrees with respect to the rotation axis fulcrum. Until the installation state is reached, lifting force is required to lift the weight of the extension working part, and after the fulcrum of 90 degrees is exceeded, there is a risk that the extension work part will accelerate its own weight and be suddenly folded. Also, when padding paddy fields and narrow paddy fields are folded, the extension work machine on one side and the left and right extension work machines are folded and the work mode is frequently switched. Unnecessary turning effort and time were required.

In order to solve the above-mentioned problems, a central portion in the length direction of the agricultural machine is attached to the rear part of the tractor via a three-point link mechanism so as to be movable up and down, and power is transmitted from the tractor to the central part of the agricultural machine. On the other hand, the working machine part extending from the central part to the left and right sides is configured to be foldable to the central part side, and the central part and the working machine part extending to the left and right are all working, the central part On the other hand, the left and right work machine parts are folded to the back side and the work is performed only at the center part, and with respect to the center part, either the left or right work machine part is folded to the back side and the center part and the left and right work machine parts are of the agricultural machine is switched to the mode in which working either, the central portion of the work machine extended working machine is a working machine part that extends to the left and right sides from both ends, the central portion by interposing the intermediate arm respectively Folding the rear side of the work machine is connected rotatably, folding angle of extension working machine of the right and left are rotatably connected to the central portion side and the rotation is the pivot point for folding shallow shallow angle to the intermediate arm A first rotating shaft and a second rotating shaft rotatably connected to the extension work machine side, which is a deep angle folding pivot for folding further to the back side with respect to the shallow angle folding position . An agricultural working machine is provided, which is provided with a folding mechanism capable of fixing or releasing the posture in the extended working state and the folded position at the shallow angle and the folded position at the shallow angle .

  Because of the above configuration, when working with the extension work part folded at the edge of the paddy field, or when working with the left and right extension parts folded in the deformed paddy field shape, When a folding mechanism set at a shallow angle with a single rotation axis as a fulcrum is used, the extension work part is located in a range almost from the standing state to a point slightly beyond the fulcrum, so that the folding operation can be performed quickly and in a short time. In addition, when moving or storing a farm road or the like, if it is further folded into the back of the central working unit with the second rotation axis as a fulcrum from the position where the shallow angle is set, it will be folded at approximately 180 degrees and the entire expectation will be compact and convenient In addition, there is an effect that the one-side folding work of the extension part, the storage and the like are made efficient.

  The configuration will be described below based on the drawings in which the present invention is implemented. 1 is an overall rear view of the present invention, FIG. 2 is a side view, FIG. 3 is a cross-sectional view showing power transmission, FIG. 4 is a plan view of a folding rotation part, and FIG. 5 is a shallow angle folding of an extension work machine. 6 is a state diagram when the extension working machine is folded at a deep angle, and FIG. 7 is a cross-sectional view of the intermediate arm portion in the state of FIG.

  The working machine shown in FIGS. 1, 2, 3 and 4 is a scraping harrow having a crushing function and a scraping function that is long in the left-right direction. Although not shown in the figure, the front portion of this scraping harrow is connected to a three-point link mechanism comprising a top link and a lower link of a tractor. The top bracket 12 and the left and right lower pins 13 of the scraping halo are connected to the above-described three-point link mechanism and are mounted on the rear portion of the tractor so as to be movable up and down.

  In FIG. 3, power transmission will be described. In this embodiment, it is configured symmetrically. A rotational force is transmitted from the PTO shaft of the tractor to the input shaft 11 of the main transmission box 4 via the universal joint. The main transmission box 4 rotationally drives the left and right rotary shafts 27 via a chain transmission case 26. The rotary shaft 27 is transmitted to the rotary shaft of the extension work machine 2 provided on the left and right via the clutch body 29 to drive the scraping rotor unit 10.

  Reference numeral 28 denotes a support frame that supports the end portion of the rotary shaft 27 of the scraper rotor portion 10 of the central working machine 1. Reference numeral 281 denotes a support frame that supports the inside of the rotary shaft on the extension work body 2 side, and reference numeral 14 denotes a side plate that supports the outside on the extension work machine 2 side. Reference numeral 7 denotes an upper surface cover that covers the upper surface of the scraping rotor unit 10 and is provided on the central working machine 1 and the left and right extension working machines 2. A first leveler 8 and a second leveler 9 are connected to the rear of these upper surface covers 7.

  In this embodiment, the central working machine 1 and the left and right extension work machines 2 are divided into three parts, and the left and right end parts of the central work machine 1 and the inner end parts of the left and right extension work machines 2 are folded and rotated. The part 3 is configured to be foldable on the upper back side of the central working machine 1. The folding rotation part 3 folds the extension work machine 2 upward at a shallow angle via the first rotating shaft 17 via the intermediate arm 22 at both ends of the main frame 5 of the central work machine 1.

  FIG. 4 is a plan view of the folding rotation portion in the working state. In this state, the first hook plate 15 on the extension work machine 2 side is the first pin 16 on the central work machine 1 side with the second rotating shaft 18 as a fulcrum. Is fixedly engaged. Reference numeral 22 denotes an intermediate arm, and the extension work machine 2 is set at the end of the main frame 5 on the central work machine 1 side by the first rotating shaft 17 so that the extension work machine 2 can be rotated by about 150 degrees, and is folded at the shallow angle.

  For example, the operation of the shallow angle folding mechanism in FIG. 5 will be described as a case where the extension work machine 2 in FIG. 4 rotates upward to select a narrow work. First, the first hook plate 15 in the state of FIG. 4 is released from the first pin 16, and the extension work machine 2 is lifted and rotated with the first rotating shaft 17 as a fulcrum. At the same time, the clutch bodies of the central work machine 1 and the extension work machine 2 are disengaged. At this time, the second engagement hole 20 presses and moves the second lock pin 191 formed on the other side of the second hook lever 19 to fix it. Accordingly, in the operation by the shallow angle folding mechanism of FIG. 5, the extension work machine is rotated about the first rotating shaft 17 as a support shaft, and the fixing and releasing operation is performed by the second lock pin 191 formed at the tip of the second hook lever 19. Made.

  FIG. 7 shows a cross section of the intermediate arm 22 in the locked state shown in FIG. The second hook lever 19 has an L-shaped tip, and a second lock pin 191 is slidably supported by an elastic body. A second hook plate 23 is provided in the vicinity of the bend at the top of the second lock pin 191. The second hook lever 19 is rotated so as to be engageable with the second pin 24 provided on the support plate 25 on the subframe 6 side.

  Reference numeral 21 denotes a third lock lever, which has a support plate 25 on the extension work machine 2 side with respect to the intermediate arm 22 and a third lock pin 211 for releasing the fixing.

  In order to make the extension work machine 2 of FIG. 5 more compact for moving and storing from the state of the work width selection work, FIG. 6 in which the deep angle folding mechanism is operated will be described.

  In FIG. 5, when the third lock lever 21 is pulled out of the retaining hole of the intermediate arm 22 with respect to the support plate 25 on the extension work machine 2 side and further rotated with the second rotation shaft 18 as a fulcrum, the extension work machine 2 side The second pin 24 is engaged with the second hook plate 23 and fixed. This fixed FIG. 6 shows the storage state. Therefore, in the deep angle folding setting, the extension work machine is unlocked by the operation of the second hook plate 23 with the second rotating shaft 18 as a support shaft.

Overall rear view Side view Cross section showing power transmission Plan view of folding rotation part State diagram of the extension machine when folded at a shallow angle State diagram of extension work machine when folded at a deep angle Sectional view of the intermediate arm in the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central work machine 2 Extension work machine 3 Folding rotation part 4 Main transmission box 5 Main frame 6 Sub frame 7 Upper surface cover 8 1st leveler 9 2nd leveler 10 Scraping rotor part 11 Input shaft 12 Top bracket 13 Lower pin 14 Side plate 15 1st 1 hook plate 16 1st pin 17 1st rotating shaft 18 2nd rotating shaft 19 2nd hook lever 191 2nd lock pin 20 2nd engagement hole 21 3rd lock lever 211 3rd lock pin 22 intermediate arm 23 2nd hook Plate 24 Second pin 25 Support plate 26 Chain transmission case 27 Rotary shaft 28 Support frame 281 Support frame 29 Clutch body

Claims (1)

At the rear part of the tractor, the central part in the length direction of the agricultural machine is mounted up and down via a three-point link mechanism, and power is transmitted from the tractor to the central part of the agricultural machine. The working machine part that is extended to the center part side can be folded to the center part side, and the work part part that extends to the center part and the working part that extends to the left and right is used. Folding the back to the back side, working with only the central part, with respect to the central part, with the left and right work machine parts folded to the back side, working with either the central part or the left and right work machine parts in agricultural machine is switched on, the central portion of the work machine extended working machine is a working machine part that extends to the left and right sides from both ends, the rotary folding the rear side of the respective central portion by interposing the intermediate arm working machine Be coupled to standing, a first rotary shaft which is rotatably connected to the central portion and the rotating folding angle of the extension working machine of the left and right in the middle arm is pivot point for folding the shallow shallow angle, the shallow A second rotary shaft that is pivotally connected to the extension work machine side, which is a pivot point for folding at a deep angle for folding further to the rear side with respect to the folding position at an angle, and having a shallow angle folding position and depth An agricultural machine characterized in that a folding mechanism capable of fixing or releasing the posture at an angle folding position and an extended extended working state is provided.

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