JP2007014262A - Farm working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease the load on a worker accompanying to the operation of a ground leveling device 51 by interlocking the up/down operation of the ground leveling device 51 with the on-off operation of power transmission to the ground leveling device 51 to surely repeat the on-off operation of power transmission with the same timing. <P>SOLUTION: The up/down operation of a ground leveling device 51 and the on/off operation of power transmission to the ground leveling device 51 are controlled at the same time by the operation of a single operation lever 85. When the on/off of power transmission is switched at a height between a non-working state to lift the ground leveling device 51 to a waiting position and a working state to lower and ground the ground working device 51, the ground leveling device is grounded to the field surface in rotating state by lowering the device 51 to quickly start the normal leveling and planting operations at the same time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an agricultural work machine including a leveling device that can be raised and lowered in front of a planting device that can be raised and lowered, and more particularly to drive control of the leveling device that accompanies raising and lowering the leveling device.

  Agricultural working machines that have planting devices for planting multiple seedlings in parallel are supported at the rear part of the traveling machine so that they can be raised and lowered via a lifting link mechanism. The steering operation of the traveling machine body can be performed with the planting device raised.

  In addition, agricultural work machines that have a leveling device that can be raised and lowered in front of the planting device to level the unevenness of the planting surface have been put into practical use. When planting, etc., the leveling device can be lowered to flatten the planting surface, thereby reducing variations in seedling planting depth.

  In Patent Document 1, a float that is guided in contact with a farm scene is provided at the bottom of the planting device, and the planting device is moved up and down in accordance with the rising / lowering of the float so that the planting depth of the seedling is constant. Agricultural implements to maintain are shown. Here, the float is pivotally supported on the rear end side, and the tilt angle of the float with respect to the field scene can be adjusted by forcibly raising and lowering the front end side with a wire. Then, the seedling can be stably planted at a certain planting depth by adjusting the tilt angle of the float according to the front and rear tilt angle of the traveling machine body, the softness of the farm scene, the planting speed, and the like.

  Patent Document 2 discloses an agricultural work machine in which a rotary leveling device is disposed in front of a planting device and is moved up and down integrally with the planting device. The leveling device can be raised together with the device. Here, when the planting device is lowered and the float is grounded, the leveling device can be raised and lowered independently by operating the elevation control lever of the leveling device, and its working position and non-working position are selected and set it can. In addition, a clutch capable of connecting / disconnecting power transmission to / from the rotary type leveling device is provided, and the rotation / stop of the rotary type leveling device is controlled by operating the clutch lever independent of the lift control lever. ing.

  Patent Document 3 shows an agricultural work machine provided with a rotary leveling device in front of a planting device. When the planting device is lifted during a change of direction on a headland, power transmission to the leveling device is demonstrated. The clutch is disengaged and rotation of the leveling device is automatically stopped.

JP 2004-229565 A JP 2004-65111 A Japanese Patent No. 3088629

  In the agricultural working machine shown in Patent Document 2, in a flattened field scene, planting can be performed by raising the leveling device and setting it to a non-working position. However, when the operator determines that the field scene is rough, or when starting planting on a headland that is likely to be rough due to repeated direction changes, the worker operates the lift control lever. Then, the leveling device must be lowered and set to the working position, and the leveling device must be controlled to the operating state (rotation state) by operating the clutch lever.

  In other words, since the lifting / lowering operation of the leveling device with respect to the planting device and the power on / off operation with respect to the leveling device are operated with separate operation levers, the operation timings of the two operation levers are shifted or the operation of one of the operation levers is operated. There is a possibility of forgetting. Specifically, dragging the leveling device while it is stopped to roughen the farming scene, or rotating the leveling device in the raised state to sprinkle mud, and paying attention to the operation of the two control levers is essential. The steering operation and speed control of the vehicle may be mistaken.

  In the agricultural work machine shown in Patent Document 3, when the planting device is raised, the leveling device automatically stops, but in the lowered state of the planting device, rotation / stop of the leveling device must be set by manual operation. So, if the lifting mechanism of the leveling device is incorporated, when the leveling device is raised in a farming scene that does not require leveling, you can forget to stop the rotation and keep the leveling device raised and rotate to spread mud. There is a possibility that foreign matter is involved.

  Also, when lowering the leveling device, if the rotation is not started prior to the landing of the leveling device, the leveling device will be overloaded, the leveling rotor will be damaged, the traveling speed will fluctuate, There is a possibility that the ground leveling will be rough and the seedling planting depth will change.

  The present invention interlocks the lifting operation of the leveling device and the power transmission on / off operation to the leveling device, and enables the power transmission on / off to be repeatedly executed at an optimal timing and reliably executed. The purpose is to reduce the burden on the operator.

  The present invention according to claim 1 is provided with a traveling machine body (11) that is mounted with an engine (17) and travels by the power of the engine (17), and a planting device that is supported by the traveling machine body (11) so as to be movable up and down. (31), and a leveling device (51) disposed between the traveling machine body (11) and the planting device (31) and supported to be moved up and down in conjunction with the planting device (31). In the agricultural work machine (10), the power transmission is turned on and off via a power transmission device (71) that transmits power from the engine (17) of the traveling machine body (11) to the leveling device (51). A clutch (73), a vertical movement means (61) for moving the leveling device (51) vertically to a working position and a non-working position in a lowered position interlocked with the planting device (31), and the clutch ( 73) and the vertical movement means 61), and a single operating means (85) for vertically operating the operating means (85) above the work positions (P1, P2, P3) of the vertical moving means (61) and the above At a predetermined position (P5) below the non-working position (P4), the clutch (73) is set to the disengaged position above the predetermined position (P5) and the engaged position below the predetermined position (P5). It is a switch.

  According to a second aspect of the present invention, in the agricultural work machine (10) according to the first aspect, the operating means (85) is configured such that the up-and-down moving means (61) is raised at a work position (P1, P2, P3). It can be adjusted.

  The reference numerals in the parentheses are for reference to the drawings and do not limit the present invention.

  According to the first aspect of the present invention, since the leveling device (51) is moved up and down and the clutch (73) is turned on and off with one operating means (85), the leveling device (51) in the planting operation is operated. The clutch (73) is turned on and off at an intermediate position (P5) between the working positions (P1, P2, P3) and the non-working position (P4) of the vertical movement means (61). For example, when shifting to headland planting, the leveling device (51) is operated from the non-working position (P4) to the working position (P1, P2, P3) with the planting device (31) lowered. Even then, the leveling device (51) is engaged with the clutch (73) at the predetermined position (P5) before reaching the work position (P1, P2, P3), and always rotates in the ground contact state, While preventing the roughening of the rice field by dragging the device (51), In the non-working position elevated the earth device (51) (P4), leveling device (51) is always so stopped, thereby preventing the idling scattering of mud by the leveling device (51).

  According to the second aspect of the present invention, since the leveling device (51) can be adjusted in height by the operating means (85) at the work position (P1, P2, P3), it is easy to use one operating means (85). It is possible to easily adjust the height of the leveling device (51) with a simple operation.

  The reference numerals in the parentheses are for reference to the drawings and do not limit the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of an agricultural work machine according to an embodiment of the present invention, FIG. 2 is a plan view of the agricultural work machine of this embodiment, and FIG. 3 is the vicinity of the leveling apparatus in a state where the leveling apparatus is set at a non-working position. 4 is an enlarged side view of the vicinity of the leveling device in a state where the leveling device is set to the working position, FIG. 5 is a front view showing the arrangement of the operation lever of the leveling device, and FIG. FIG. 7 is an explanatory diagram of the lever guide, FIG. 8 is an explanatory diagram of a clutch connection point for transmitting power to the leveling unit, FIG. 9 is a plan view of the height adjusting mechanism of the leveling device, and FIG. 11 is an explanatory diagram of the movement mechanism, FIG. 11 is an explanatory diagram of the operation of the interlocking mechanism when the planting device is lowered, and FIG. 12 is an explanatory diagram of the operation of the interlocking mechanism when the planting device is raised.

  1 to 10, the interlocking mechanism 120 that interlocks the raising and lowering of the planting device 31 and the power transmission of the leveling device 51 is not shown in order to facilitate understanding of other configurations. 11 and 12, other mechanisms around are omitted from the illustration in order to facilitate understanding of the interlocking mechanism 120.

<Agricultural work machines>
As shown in FIG. 1, the agricultural work machine 10 supports the planting device 31 and the leveling device 51 so as to be movable up and down by a lifting link mechanism 21 connected to the rear portion of the traveling machine body 11. The traveling machine body 11 includes a machine body 15 supported by front wheels 12 and rear wheels 13, and an engine 17 covered with a hood 16 is mounted in front of the machine body 15.

  A seat seat 20 on which an operator is seated is disposed behind the engine 17. Around the seat seat 20, a steering handle 18, various levers necessary for driving operation of the agricultural work machine 10, various pedals, Various switches, instruments, etc. are arranged.

  The elevating link mechanism 21 includes an upper link 22 and a lower link 23 that are pivotally supported by a rear portion of the machine body 15, and a link holder 25 that is connected to the rear ends of the upper link 22 and the lower link 23. A hydraulic cylinder 26 disposed between the lower link 23 and the lower link 23 is provided. When the hydraulic cylinder 26 operates in the shortening direction, the lower link 23 is pulled toward the machine body 15 and the link holder 25 is raised.

  The planting part 33 arrange | positioned at the lower part of the planting apparatus 31 plants a plurality of seedlings on a rice field in parallel. The planting depth adjustment unit 41 arranged at the bottom of the planting device 31 is controlled as shown in Patent Document 1, for example, and adjusts the planting depth of the seedling by following the rice field with the float 45. The frame 32 that supports the entire planting device 31 is supported so as to be able to roll with respect to the link holder 25 of the elevating link mechanism 21, and a seedling bed 35 is inclined on the stay 34 fixed to the frame 32. ing.

  As shown in FIG. 2, the seedling platform 35 of the planting device 31 mounts mat seedlings in which seedlings to be planted on the rice field are closely held in an aligned state. As shown in FIG. 9, the planting portion 33 disposed on the lower end side of the seedling platform 35 includes a plurality of planting cases 37 that are rotatably supported on the side surfaces of the rear end portions of the plurality of transmission cases 36. A plurality of planting rods 38 that scrape one seedling from the mat seedling and plant it on the rice field are disposed in each planting case 37. Power is transmitted through the frame 32 and the inside of the transmission case 36 from the PTO shaft (not shown) driven by the engine 17 (see FIG. 1) mounted on the traveling machine body 11.

  As shown in FIG. 3, the planting depth adjustment unit 41 includes a shaft 42 that is rotatably supported on the lower surface of the transmission case 36, and an arm that has one end fixed to the shaft 42 and protrudes obliquely downward and rearward. 43, a float 45 that is rotatably supported by the other end of the arm 43 and whose bottom surface contacts and slides on the pad surface, an arm 46 having one end fixed to the shaft 42 and projecting upward, And an adjustment lever 47 connected to the end.

  As shown in FIG. 10, the adjustment lever 47 can be moved along the lever guide 48 and can be set. The adjustment lever 47 can be set to any one of a standard position, a shallow planting position, and a deep planting position formed on the lever guide 48. Retained in the groove. Here, when the adjustment lever 47 is operated to the traveling machine body 11 side, the arm 46 and the arm 43 rotate counterclockwise to raise the float 45 with respect to the transmission case 36, so that the float 45 contacts the surface. In this state, the entire planting device 31 is lowered with respect to the rice field, and the planting rod 38 approaches the rice field to perform deep planting of seedlings. However, when the adjustment lever 47 is operated to the seedling bed 35 side, the arm 46 and the arm 43 rotate clockwise to lower the float 45 with respect to the transmission case 36, so that the float 45 comes into contact with the rice field. If it is a state, the whole planting apparatus 31 will raise with respect to a rice field, and the planting rod 38 will space apart from a rice field, and will plant a seedling shallowly.

<Soil preparation device>
As shown in FIG. 3, a leveling device 51 is disposed between the rear wheel 13 of the traveling machine body 11 and the float 45 of the planting device 31 so as to be supported on the planting device 31 side. When the leveling device 51 is lowered and set to the work position, the leveling device 51 is grounded in a rotating state, and the surface is smoothed and leveled. The leveling device 51 moves the leveling portion 52 in the vertical direction and sets its working position and non-working position with the leveling portion 52 leveling the surface smoothly and the planting device 31 lowered. A mechanism 61; a power transmission mechanism 71 that transmits power to the leveling unit 52; and an operation mechanism 81 that simultaneously performs vertical movement of the leveling unit 52 in the vertical movement mechanism 61 and power on / off of the power transmission mechanism 71. .

  The leveling section 52 includes a support rod 53, a roller 55 supported by the support rod 53, a rotary shaft 56 rotatably supported by the roller 55, and a plurality of squirrel-cage rotors 57 supported by the rotary shaft 56 (see FIG. 9) and a rotor cover 58 covering the upper portion of the cage rotor 57. The support rod 53 is supported by a linkage arm 66 and a link 68 formed in a substantially triangular shape so as to be movable up and down, and is stretched between the front surface (surface on the traveling machine body 11 side) of the seedling bed 35 and the support rod 53. It is biased upward (non-working position) by a spring (not shown).

  When the operation lever 85 is rotated backward as shown in FIG. 3, the vertical movement mechanism 61 rotates the linkage arm 66 counterclockwise to raise the support rod 53. As shown in FIG. When the operation lever 85 is rotated forward, the linkage arm 66 is rotated clockwise to lower the support rod 53.

  As shown in FIG. 10, the vertical movement mechanism 61 includes a linkage arm 66, a support shaft 62 (fulcrum shaft) that is rotatably supported with respect to the stay 34, and an arm 63 with one end supported by the support shaft 62. A pin 65 (first pin) supported on the other end of the arm 63, a link 67 having one end rotatably supported by the support shaft 62, and one end pivotable to the other end of the link 67. And a supported link 68.

  As shown in FIG. 3, the power transmission mechanism 71 includes a power transmission unit 72 disposed at the rear of the vehicle body 15 of the traveling vehicle body 11, a clutch 73 disposed on the output side of the power transmission unit 72, and the clutch 73. And a telescopic transmission shaft 75 for receiving power transmission. The clutch 73 is provided with a clutch arm 126 (see FIG. 11) for turning the clutch 73 on and off.

  Then, by the engagement operation of the clutch 73, the output of the power transmission unit 72 is transmitted to the rotary shaft 56 of the leveling unit 52 through the power transmission mechanism 71 to rotate the cage rotor 57. However, when the clutch 73 is disengaged, the power of the power transmission unit 72 is cut off, and the rotation of the cage rotor 57 is stopped.

  The operation unit 81 includes an operation lever 85 that is rotatably supported by a shaft 82, a cam plate 90 that is integrally fixed to the operation lever 85, and a lever guide 83 that is disposed below the side surface of the seat seat 20. is doing. As shown in FIG. 5, the operation lever 85 is disposed on the left side in the traveling direction of the seat 20 and can be operated in the front-rear direction along the lever guide 83 disposed below the side surface of the seat 20. By operating these, the storage position (P4) shown in FIG. 7A and the work positions (P1, P2, P3) shown in FIG. 7B can be selected and set.

  As shown in FIG. 6A, the cam plate 90 is pivotally supported by a pin 82 and is rotatable, and a cam groove 88 including a pressing surface 86 and an allowable portion 87 is formed. The operation of the operation lever 85 is distributed by the cam plate 90 to a lifting operation system of the leveling unit 52 and a rotation operation system of the cage rotor 57 of the leveling unit 52.

  As shown in FIG. 3, the lifting operation system has a link 92 having one end rotatably connected to a pin 91 fixed to the cam plate 90, and one end rotating through a shaft 93 to the rear end of the machine body 15. An arm 95 that is freely supported and has the other end rotatably connected to the other end of the link 92 via a pin 96, a link 97 having one end rotatably connected to the pin 96, and a pin 98 A character-shaped bent portion is rotatably supported by the link holder 25 together with the lower link 23, one end is rotatably connected to the other end of the link 97, and one end is formed at the other end of the arm 100. A pin 102 that slidably penetrates the long hole 101 is provided, and an arm 103 having the other end fixed to the support shaft 62 is provided.

  As shown in FIG. 6A, the rotation operation system has a long hole 105 through which the shaft 82 slidably penetrates at the upper end, and a pin 106 slidably engaged with the cam groove 88 at the center. And a link 108 connected to the bracket 107. When the operation lever 85 is rotated, the pin 106 is guided to the cam groove 88 and the bracket 107 moves in the axial direction. The movement of the bracket 107 rotates the clutch arm 126 (see FIG. 11) via the link 108. The clutch 73 is turned on and off.

  As shown in FIG. 10, the height adjusting unit 111 includes an arm 112 fixed to the shaft 42, a link 113 rotatably connected to the arm 112, a bracket 115 fixed to the link 113, and a seedling. At the time of deep planting, the shaft center is supported by the bracket 115 so as to substantially coincide with the shaft center on the support shaft 62, and has a pin 116 (second pin) that is rotatably connected to the linkage arm 66. . The height adjusting unit 111 is operated by operating the adjusting lever 47 of the planting depth adjusting unit 41.

  When the support shaft 62 is rotated by the operation of the operation lever 85 of the operation unit 81, the operation force of the linkage arm 66 is transmitted via the arm 63 and the pin 65 (first pin) and the pin 116 (second pin). Oscillate around the center pin. Further, when the height adjusting unit 111 is actuated by operating the adjusting lever 47 of the planting depth adjusting unit 41, the operating force is transmitted via the link 113, the bracket 115 and the pin 116, as shown in FIG. The linkage arm 66 rotates around the pin 65.

<Clutch operation with operation of the control lever>
As shown in FIG. 7A, lever positions P1, P2, P3, and P4 are set along the lever guide 83. As shown in FIG. 8, the operation lever 85 can be rotated to set the respective lever positions P1, P2, P3, and P4. Then, by adjusting the length of the link 108, the connection and disconnection of the clutch are switched in the vicinity of the intermediate lever position P5. That is, the lever positions P5 to P4 are the clutch disengagement area, and the lever positions P1 to P5 are the clutch engagement area.

  In the clutch connection region of lever positions P1 to P5, lever positions P1 (deep), P2 (standard), and P3 (shallow) can be set to switch the height of the leveling portion 52 lowered to the working position in three stages. It is.

  As shown in FIG. 3, when the arm 100 is rotated about the pin 98 as a fulcrum through the cam plate 90, the pin 91, the link 92, and the link 97 by the operation of the operation lever 85, the support shaft is connected via the arm 103. 62 (see FIG. 9) rotates. When the support shaft 62 rotates, as shown in FIG. 10, the linkage arm 66 rotates about the pin 116 via the arm 63 and the pin 65, and the support rod 53 is moved up and down, so that the leveling portion 52 moves in the vertical direction. Moving.

  As shown in FIG. 7A, when the operation lever 85 is set to the lever position P4 (retracted), the arm 100 moves the pin 98 through the cam plate 90, the link 92, and the link 97 as shown in FIG. The arm 103 rotates counterclockwise about the center, the arm 103 rotates clockwise and the support shaft 62 rotates clockwise, and the linkage arm 66 rotates about the pin 116 via the arm 63 and the pin 65. Rotate in the direction. As a result, the support rod 53 connected to the linkage arm 66 moves upward, and the leveling portion 52 is positioned at the non-working position. At the same time, the clutch arm 126 rotates counterclockwise via the cam plate 90 and the link 108 to disengage the clutch 73, and power transmission to the leveling section 52 is interrupted.

  On the other hand, when the operation lever 85 is set to the lever position P2 as shown in FIG. 7B, the arm 100 is centered on the pin 98 via the cam plate 90, the link 92, and the link 97 as shown in FIG. And the arm 103 is rotated counterclockwise to rotate the support shaft 62 counterclockwise, and the linkage arm 66 is rotated about the pin 116 via the arm 63 and the pin 65. Rotate clockwise. As a result, the support rod 53 connected to the linkage arm 66 moves downward to ground the leveling portion 52. At this time, since the clutch 73 is in the engaged state when the operating lever passes the lever position P5 shown in FIG. 8, the leveling portion 52 is grounded in the rotating state and positioned at the working position.

<Clutch operation with raising and lowering planting device>
As shown in FIG. 11, an interlocking mechanism 120 that mechanically detects the raising and lowering of the planting device 31 and connects / disconnects the clutch 73 is disposed at the connecting portion of the lower link 23 of the lifting link mechanism 21 on the machine body 15 side. ing. The interlocking mechanism 120 has an arm 124 fixed to the lower link 23, a relay lever 121 pivotally supported on the body 15 using a pin 122, and a clutch arm 126 pivotally supported on the clutch 73 using a pin 127. is doing.

  11, the pin 23a fixed to the arm 124 is held in a long hole formed in the relay lever 121, and by the rotation of the arm 124 integral with the lower link 23, The relay lever 121 rotates around the pin 122. The clockwise rotation of the relay lever 121 causes the clutch arm 126 to rotate counterclockwise through the link 123 to disengage the clutch 73.

  A long hole 128 is formed on the rotating side of the clutch arm 126, and when the planting device 31 is lowered, the link 123 is positioned in the middle of the long hole 128, and the link 108 is moved in the axial direction. The rotation of the clutch arm 126 is not affected. However, when the lower link 23 rotates upward as the planting device 31 rises, the relay lever 126 rotates clockwise to pull up the link 123, and the upper end of the long hole 128 is pulled up by the link 123. The clutch arm 126 rotates counterclockwise.

  The link 108 has a built-in spring mechanism 108a (FIG. 12), and the spring mechanism 108a can absorb the movement in the compression direction. Does not interfere with rotation. In other words, the link 123 rotates the clutch arm 126 held at the turning position in the on state by the spring mechanism 108a to the turning position in the cut state against the spring mechanism 108a.

<Effect of this embodiment>
In the agricultural work machine 10 according to the present embodiment, the leveling device 51 is moved up and down and the clutch 73 is turned on and off with one operating lever 85, so that the leveling device 51 can be easily operated in the planting work. However, since the clutch 73 is turned on and off at an intermediate position (P5) between the working position (P1, P2, P3) and the non-working position (P4) of the up-and-down moving means 61, for example, shifting to headland planting. Even if the leveling device 51 is operated from the non-working position (P4) to the work position (P1, P2, P3) with the planting device 31 lowered, the leveling device 51 is still in the working position (P1, P2, P3). The clutch (73) is engaged at a predetermined position (P5) before turning to), and always rotates in the ground contact state, and the roughening of the surface due to the dragging of the leveling device 51 can be surely prevented, and the leveling device Non-working position (P In the), since the leveling device 51 is always stopped, thereby preventing the scattering of mud by idling of the leveling device 51.

  Further, the leveling device 51 can adjust the height in three steps of shallow, standard, and deep by setting the operation lever 85 at the work position (P1, P2, P3). Thus, the height adjustment of the leveling device 51, in other words, the leveling depth can be easily adjusted.

  That is, since the leveling device 51 performs “on / off” of the rotational drive in the middle (P5) between the working state (P1, P2, P3) and the non-working state (P4), the non-rotating, non-working state in the working state When the leveling device 51 is lifted in a farming scene that does not require leveling, forgetting to stop the rotation and continuously rotating the leveling device 51 while lifting up the mud. Do not involve foreign matter such as weeds of reeds.

  Further, when the ground leveling device 51 is lowered and brought into contact with the ground, the rotation is started prior to the landing of the leveling device, and is always grounded in a constant driving state, so that a normal leveling state is quickly started. The ground leveling device 51 starts to rotate after contact with the ground, causing an overload, and the leveling rotor is not damaged, the traveling speed is fluctuated, the leveling surface is rough, and the seedling planting depth does not change.

  Further, when the leveling device is raised, the rotation is stopped at an early stage, and the stopped leveling device is stopped at the non-working position, so there is a concern that a load or the like mounted on the agricultural work machine 10 may be caught in the leveling device. There is no.

  In addition, when shifting to headland planting in a traveling state in which the planting device 31 is lowered, the ground leveling device 51 is grounded to the field scene while rotating even if the leveling device 51 is lowered to the working state. Do not tamper. That is, it is possible to quickly shift to leveling simultaneous planting.

  Further, by operating the single operation lever 85, the leveling unit 52 can be moved up and down and the power to the leveling unit 52 can be operated at the same time, and the squirrel-cage rotor 57 can be idled at its raised position (non-working position). Alternatively, it is possible to prevent an operation error such as making the rice field rough by moving the cage rotor 57 while the rotation of the cage rotor 57 is stopped at the lowered position (working position).

  In addition, since the lifting / lowering operation of the leveling device 51 and the power transmission on / off operation to the leveling device 51 are interlocked, the power transmission on / off can be repeatedly executed at an optimum timing and reliably executed. The burden on the operator due to the operation is reduced, and even an inexperienced operator can master the operation in a short period of time, and it is possible to prevent the planting device 31 from being raised and lowered and a steering operation error.

  Further, since the power transmission to the leveling device 51 is controlled by the interlocking mechanism 120 in completely interlocked with the lifting operation of the planting device 31 and the lifting operation of the leveling device 51, the operator can operate the leveling device 51. Without being distracted, it is possible to concentrate on the raising and lowering of the planting device 31 and the steering operation.

  Further, the spring mechanism 108a is built in the link 108, and the clutch 73 is disengaged by the interlocking mechanism as the planting device 31 is lifted while the operation lever 85 is tilted forward to be in the clutch engaged state. When the planting device 31 is lowered after the direction change on the ground, the leveling section 52 resumes rotating immediately and the planting operation with the leveling is started, so that the operation lever 85 automatically moves as the planting device 31 rises. As in the case of returning to the clutch disengaged state, there is no worry of forgetting to operate the operation lever 85 and starting planting without leveling.

It is a side view of the agricultural working machine which is one Embodiment of this invention. It is a top view of the agricultural working machine of this embodiment. It is an expanded side view of the leveling device vicinity in the state which set the leveling device to the non-working position. It is an expanded side view of the leveling device vicinity in the state which set the leveling device to the working position. It is a front view which shows arrangement | positioning of the operation lever of a leveling apparatus. It is explanatory drawing of the operation state of the clutch in an operation lever. It is explanatory drawing of a lever guide. It is explanatory drawing of the connection point of the clutch which transmits motive power to a leveling part. It is a top view of the height adjustment mechanism of a leveling device. It is explanatory drawing of a vertical movement mechanism. It is explanatory drawing of operation | movement of the interlocking mechanism in the state which lowered | hung the planting apparatus. It is explanatory drawing of operation | movement of the interlocking mechanism in the state which raised the planting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Agricultural work machine 11 Traveling machine body 17 Engine 31 Planting device 51 Leveling device 61 Vertical movement means (vertical movement mechanism)
71 Power transmission device (power transmission mechanism)
73 Clutch 85 One operating means (operating lever)
120 Interlocking means (interlocking mechanism)
P1, P2, P3 Working position (lever position)
P4 Non-working position (lever position)
P5 Middle (lever position)

Claims (2)

A traveling machine body that is equipped with an engine and travels by the power of the engine;
A planting device supported by the traveling machine body so as to be movable up and down;
In an agricultural working machine comprising: a ground leveling device disposed between the traveling machine body and the planting device and supported by raising and lowering in conjunction with the planting device,
A clutch for turning power transmission on and off via a power transmission device for transmitting power from the engine of the traveling machine body to the leveling device;
Up-and-down moving means for moving the leveling device up and down to a working position and a non-working position at a lowered position interlocked with the planting device;
And a single operating means for turning on and off the clutch and operating the vertical movement means up and down,
The operating means is located at a predetermined position above the working position and below the non-working position of the vertical movement means, and the clutch is set to the disengaged position above the predetermined position and the engaged position below the predetermined position. Agricultural work machine characterized by being switched as described above. The operation means is configured such that the vertical movement means can be adjusted in height at a work position.
The agricultural work machine according to claim 1.

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