JP2010051203A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate an inconvenience in which ground braking force is weakened, the right and left balance of braking force is lost and a machine body is moved right and left in the operation of stop of a machine body traveling during rotation in a transplanter provided with a side clutch interlocking mechanism. <P>SOLUTION: A riding type rice transplanter 1 includes: a side clutch interlocking mechanism 29 for automatically disengaging side clutches 23R and 23L on the inside of rotation in conjunction with an operation in which the steering angle of a steering mechanism 28 exceeds a prescribed angle; and a mechanism 48 for operating a traveling stop of machine body, which disengages a main clutch 9 placed in a traveling power transmission path according to the operation of a clutch brake pedal 47 and operates a single brake 20 placed in the traveling power transmission path to stop a machine body from traveling. The riding type rice transplanter is further provided with a side clutch interlocking prevention mechanism 51 for preventing interlocking between the steering mechanism 28 and the side clutches 23R and 23L when the clutch brake pedal 47 is operated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transplanter including a side clutch interlocking mechanism that automatically disconnects a side clutch inside a turn in conjunction with the steering angle of a steering mechanism exceeding a predetermined angle.

2. Description of the Related Art A transplanter including a side clutch interlocking mechanism that automatically disconnects a side clutch inside a turn in conjunction with the steering angle of a steering mechanism exceeding a predetermined angle is known (see, for example, Patent Documents 1 and 2). According to such a transplanter, it is not necessary to consciously disengage the side clutch inside the turning when the body is turned slightly on a headland or the like, so that there is an advantage that the operation burden on the operator can be reduced.
JP 2003-102215 A JP 2004-243843 A

  However, in a conventional transplanter equipped with a side clutch interlocking mechanism, when the airframe traveling stop operation is performed during turning (side clutch disengaged state), braking force is applied to one rear wheel (or one rear wheel and left and right front wheels). Since the other rear wheel maintains the free rotation state, not only the ground braking force is weakened, but also the right and left balance of the braking force is lost, and there is a possibility that the left and right sides of the aircraft may be shaken.

The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems, and includes a steering mechanism for steering left and right front wheels according to the operation of a steering handle, and left and right rear wheels. Left and right side clutches installed in the power transmission path, a side clutch linkage mechanism that automatically cuts the side clutch inside the turn in response to the steering angle of the steering mechanism exceeding a predetermined angle, and a clutch / brake In response to the operation of the operating tool, disconnect the main clutch installed in the travel power transmission path and operate the single brake installed in the travel power transmission path to stop the aircraft travel stop operation And a mechanism for preventing the steering mechanism and the side clutch from being interlocked when the clutch / brake operating tool is operated. Characterized in that a id clutch interlocking blocking means. In this way, the clutch / brake operating tool can be operated even if it is equipped with a side clutch interlocking mechanism that automatically disconnects the side clutch inside the turn in conjunction with the steering angle of the steering mechanism exceeding a predetermined angle. When this happens, the linkage between the steering mechanism and the side clutch is blocked, so that the braking force of the brake is transmitted to the left and right rear wheels (or the left and right rear wheels and the left and right front wheels) even during temporary turning. Can do. As a result, it is possible to eliminate the inconvenience that the ground braking force becomes weak or the left / right balance of the braking force is lost and the aircraft is shaken left and right during the turning stop operation while turning, so that the aircraft can be stopped reliably and stably. it can.
In addition, a side clutch interlock release operation mechanism that releases the interlock between the steering mechanism and the side clutch in response to an operation of the side clutch interlock release operation tool is provided. -It is characterized by connecting brake operating tools. In this case, since the side clutch interlocking blocking means is configured using the side clutch interlock release operation mechanism, it is possible to avoid complication of structure and cost increase.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a riding rice transplanter (transplanter). The riding rice transplanter 1 includes a traveling machine body 2 and a planting part 4 connected to a rear part of the traveling machine body 2 via a lifting link mechanism 3. And the leveling rotor 5 provided in the front side of this planting part 4 is comprised.

  As shown in FIG. 2, the traveling machine body 2 includes an engine 6 mounted on the front part of the machine body, a hydraulic continuously variable transmission 7 that continuously changes engine power, and an engine power via the continuously variable transmission 7. And a mission case 8 for inputting. In the mission case 8, the input power is turned on / off by the main clutch 9, and branched into planting power and work power downstream of the transmission of the main clutch 9. The branched planting power is output from the planting PTO shaft 12 via the inter-plant transmission mechanism 10 and the planting clutch mechanism 11, and is transmitted to the planting unit 4 from here.

  The travel power is shifted by the subtransmission mechanism 13 and branched into front wheel power and rear wheel power at a travel transmission shaft 14 downstream of the transmission. The front wheel power is distributed to the left and right differential output shafts 16L and 16R via a differential mechanism (differential mechanism) 15, and is transmitted from here to the left and right front wheels 17. On the other hand, the rear wheel power is output from the traveling PTO shaft 18 and transmitted to the rear axle case 21 via the propeller shaft 19 and the single brake 20.

  The rear axle case 21 has a left and right rear side through a distribution shaft 22 that distributes the rear wheel power input via the brake 20 to the left and right, and a pair of left and right side clutches 23L and 23R provided on the left and right sides of the distribution shaft 22. The rear wheel power is transmitted to the wheel 24. The side clutches 23L and 23R are selectively turned off when the aircraft is turning, and the transmission to the rear wheel 24 inside the turning is cut off, thereby enabling the vehicle to turn around. The side clutches 23L and 23R are operated to be disconnected by a pair of left and right clutch arms 25L and 25R provided on the upper portion of the rear axle case 21.

  As shown in FIGS. 3 to 5, a pitman arm 26 is provided at the bottom of the mission case 8. The pitman arm 26 is pivotally connected to the steering handle 27 and the front wheel 17 so as to rotate left and right in accordance with the operation of the steering handle 27 and steer the left and right front wheels 17 to form a steering mechanism 28. In addition, a side clutch interlocking mechanism 29 is connected to the pitman arm 26. The side clutch interlocking mechanism 29 is configured to automatically disengage the side clutches 23L and 23R inside the turn in conjunction with the steering angle of the steering mechanism 28 exceeding a predetermined angle. Thereby, when the machine body is turned slightly on a headland or the like, it is not necessary to consciously turn the side clutches 23L and 23R inside the turn, thereby reducing the operation burden on the operator.

  The side clutch interlocking mechanism 29 of the present embodiment includes a pair of left and right rods 30L and 30R that are pushed and pulled in accordance with the rotation of the pitman arm 26, and a pair of left and right that are rotatably fitted to the pedal shaft 31. Arm bosses 32L, 32R, first arms 34L, 34R extending downward from the inner ends of the arm bosses 32L, 32R and linked to the rods 30L, 30R via springs 33, and outer ends of the arm bosses 32L, 32R And second arms 36L, 36R that extend upward from the section and are connected to the clutch arms 25L, 25R via rods 35L, 35R, respectively. That is, when the pitman arm 26 rotates according to the turning operation of the steering mechanism 28, the rods 30L, 30R inside the turning push the first arms 34L, 34R rearward via the springs 33 and rotate forward accordingly. The moving second arms 36L and 36R pull the clutch arms 25L and 25R forward via the rods 35L and 35R, so that the side clutches 23L and 23R inside the turning are automatically disconnected.

  As shown in FIGS. 6 to 10, when the passenger rice transplanter 1 of the present embodiment slips during turning, the side clutches 23 </ b> L and 23 </ b> R on the inner side of the turning are returned to the engaged state, and the slip state is escaped. A side clutch interlock release operation mechanism 37 is provided. The side clutch interlock release operation mechanism 37 of this embodiment rotates a release arm 39 forward in response to an operation of an interlock release pedal (side clutch interlock release operation tool) 38, and a pin 40 provided on the release arm 39. Is configured to release the interlock between the steering mechanism 28 and the side clutches 23L, 23R by pushing the first arms 34L, 34R forward against the urging force of the spring 33.

  Specifically, the side clutch interlock release operation mechanism 37 of the present embodiment includes an arm boss 41 that is rotatably fitted to the pedal shaft 31 in addition to the interlock release pedal 38, the release arm 39, and the pin 40 described above. A first arm 42 extending rearward from the arm boss 41 and connected to the interlock release pedal 38; a second arm 43 extending forward from the arm boss 41; and a support shaft 44 of the release arm 39 extending forward; A third arm 46 connected to the second arm 43 via a link plate 45 is provided. When the interlock release pedal 38 is stepped on, the third arm 46 is pulled upward via the link plate 45 as the first arm 42 and the second arm 43 rotate with the pedal shaft 31 as a fulcrum. The release arm 39 pivots forward. As a result, the pin 40 of the release arm 39 pushes the first arms 34L and 34R forward against the urging force of the spring 33, and the linkage between the steering mechanism 28 and the side clutches 23L and 23R is released.

  Further, in the riding rice transplanter 1, the main clutch 9 provided in the travel power transmission path is disconnected in accordance with the operation of the clutch / brake pedal (clutch / brake operating tool) 47, and the travel power transmission path is interposed. An airframe travel stop operation mechanism 48 is configured to operate the single brake 20 provided to stop the airframe travel. The airframe travel stop operation mechanism 48 according to the embodiment of the present invention includes a main clutch operation mechanism 49 that disengages the main clutch 9 according to the operation of the clutch / brake pedal 47, and an operation according to the operation of the clutch / brake pedal 47. In addition, the brake operation mechanism 50 for cutting the brake 20 is included, and a side clutch interlocking blocking mechanism that prevents the steering mechanism 28 and the side clutches 23L and 23R from interlocking according to the operation of the clutch / brake pedal 47 ( Side clutch interlocking prevention means) 51 is included.

  In this manner, even if the side clutch interlocking mechanism 29 that automatically disconnects the side clutches 23L and 23R inside the turn in conjunction with the steering angle of the steering mechanism 28 exceeding a predetermined angle is provided, When the brake pedal 47 is operated, the linkage between the steering mechanism 28 and the side clutches 23L and 23R is prevented, so that the braking force of the brake 20 is applied to the left and right rear wheels 24 (or even during temporary turning). It can be transmitted to the left and right rear wheels 24 and the left and right front wheels 17). As a result, it is possible to eliminate the inconvenience that the ground braking force becomes weak or the left / right balance of the braking force is lost and the aircraft is shaken left and right during the turning stop operation while turning, so that the aircraft can be stopped reliably and stably. it can.

  Hereinafter, the main clutch operation mechanism 49, the brake operation mechanism 50, and the side clutch interlocking prevention mechanism 51 included in the airframe travel stop operation mechanism 48 will be described with reference to FIGS.

  The main clutch operating mechanism 49 is connected to the first arm 52 that rotates upward about the pedal shaft 31 in response to the depression operation of the clutch / brake pedal 47, and the first arm 52 and the link plate 53. A second arm 55 that rotates integrally with the connecting shaft 54, and a third arm 58 that is provided integrally with the other end of the connecting shaft 54 and that is connected to the clutch arm 57 via the rod 56. It is prepared for. Then, when the clutch / brake pedal 47 is depressed, the clutch arm 57 is pulled backward via the first arm 52, the link plate 53, the second arm 55, the connecting shaft 54, the third arm 58 and the rod 56, The main clutch 9 is disengaged.

  The brake operation mechanism 50 is connected via a first arm 59 that rotates forward about the pedal shaft 31 according to the depression operation of the clutch / brake pedal 47, and the first arm 59 and the rod 60. A second arm 62 that rotates integrally with the connecting shaft 61, and a third arm 65 that is provided integrally with the other end of the connecting shaft 61 and is connected to the brake arm 64 via the link plate 63. Configured. When the clutch / brake pedal 47 is depressed, the brake arm 64 is pulled sideways through the first arm 59, the rod 60, the second arm 62, the connecting shaft 61, the third arm 65, and the link plate 63. The brake 20 is activated.

  The side clutch interlocking blocking mechanism 51 is moved forward from the first arm 66 that rotates upward about the pedal shaft 31 and the support shaft 44 of the release arm 39 described above in response to the depression operation of the clutch / brake pedal 47. The second arm 68 extends and is linked to the first arm 66 via a link plate 67. When the clutch / brake pedal 47 is depressed, the release arm 39 is rotated forward via the first arm 66, the link plate 67 and the second arm 68. As a result, the pin 40 of the release arm 39 pushes the first arms 34L and 34R forward against the urging force of the spring 33, and the linkage between the steering mechanism 28 and the side clutches 23L and 23R is released.

  That is, the side clutch interlocking prevention mechanism 51 of the present embodiment is configured by connecting the clutch / brake pedal 47 to the above-described side clutch interlock release operation mechanism 37, thereby avoiding the complexity of the structure and the cost increase. it can. Note that the link plate 67 and the second arm 68 are connected to each other through an interchange mechanism using a long hole 67a and a pin 68a. Thus, the side clutch interlock release operation by the interlock release pedal 38 is allowed in a state where the clutch / brake pedal 47 is not operated.

  According to the present embodiment configured as described, the steering mechanism 28 that steers the left and right front wheels 17 in response to the operation of the steering handle 27, and the left and right sides interposed in the left and right rear wheel power transmission paths, respectively. The clutches 23L and 23R, the side clutch interlocking mechanism 29 that automatically disconnects the side clutches 23L and 23R inside the turn in conjunction with the steering angle of the steering mechanism 28 exceeding a predetermined angle, and the operation of the clutch / brake pedal 47 Accordingly, the main body travel stop operation mechanism 48 that stops the main body travel by disengaging the main clutch 9 interposed in the travel power transmission path and operating the single brake 20 interposed in the travel power transmission path. When the clutch / brake pedal 47 is operated, the steering mechanism 28 and the side clutch Since the side clutch interlocking blocking mechanism 51 for blocking the interlocking with 23L and 23R is provided, the side clutches 23L and 23R inside the turn are automatically disconnected in conjunction with the steering angle of the steering mechanism 28 exceeding a predetermined angle. Even if the side clutch interlocking mechanism 29 is provided, when the clutch / brake pedal 47 is operated, the interlocking between the steering mechanism 28 and the side clutches 23L and 23R is prevented. Thereby, even during temporary turning, the braking force of the brake 20 can be transmitted to the left and right rear wheels 24 (or the left and right rear wheels 24 and the left and right front wheels 17). As a result, it is possible to eliminate the inconvenience that the ground braking force becomes weak or the left / right balance of the braking force is lost and the aircraft is shaken left and right during the turning stop operation while turning, so that the aircraft can be stopped reliably and stably. it can.

  In addition, a side clutch interlock release mechanism 37 that releases the interlock between the steering mechanism 28 and the side clutches 23L and 23R according to the operation of the interlock release pedal 38 is provided. Since the clutch / brake pedal 47 is connected to the mechanism 37, the side clutch interlock release mechanism 51 can be configured by using the side clutch interlock release operation mechanism 37. As a result, the structure is not complicated and the cost is increased. can do.

It is a whole side view of a riding rice transplanter. It is a transmission circuit diagram which shows the transmission structure of a riding rice transplanter. It is a top view which shows a side clutch interlocking mechanism. It is a side view which shows a side clutch interlocking mechanism. It is a top view which shows a side clutch interlocking mechanism and a body travel stop operation mechanism. It is a principal part top view which shows a side clutch interlocking | linkage release operation mechanism and an airframe travel stop operation mechanism. It is a principal part side view which shows a side clutch interlocking | release release operation mechanism and an airframe travel stop operation mechanism. It is operation | movement explanatory drawing which shows the initial state of a side clutch interlocking | release release mechanism and an airframe travel stop operation mechanism. It is action explanatory drawing which shows the interlock release pedal operation state of a side clutch interlock release operation mechanism and a body travel stop operation mechanism. It is action explanatory drawing which shows the clutch and brake pedal operation state of a side clutch interlock release operation mechanism and a body travel stop operation mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Passenger rice transplanter 2 Traveling machine body 9 Main clutch 17 Front wheel 20 Brake 23 Side clutch 24 Rear wheel 27 Steering handle 28 Steering mechanism 29 Side clutch interlocking mechanism 37 Side clutch interlocking release operation mechanism 38 Interlocking release pedal 47 Clutch / brake pedal 48 Airframe traveling Stop operation mechanism 51 Side clutch interlock prevention mechanism

Claims (2)

A steering mechanism that steers the left and right front wheels according to the operation of the steering handle;
Left and right side clutches respectively interposed in the left and right rear wheel power transmission paths;
A side clutch interlocking mechanism that automatically disconnects the side clutch inside the turn in conjunction with the steering angle of the steering mechanism exceeding a predetermined angle;
In response to the operation of the clutch / brake operation tool, the main clutch provided in the travel power transmission path is disengaged, and the single brake provided in the travel power transmission path is operated to stop the aircraft from traveling. A transplanter equipped with a travel stop operation mechanism,
A transplanter comprising a side clutch interlocking blocking means for blocking the interlocking of the steering mechanism and the side clutch when the clutch / brake operating tool is operated.   A side clutch interlock release mechanism that releases the interlock between the steering mechanism and the side clutch according to the operation of the side clutch interlock release operation tool is provided. The transplanter according to claim 1, wherein the transplanter is configured by connecting operation tools.

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