JP2006262766A - Farm working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a farm working machine which can not carry out only weeding operation of ridge groove, but can carry out also weeding operation on the ridge. <P>SOLUTION: In the farm working machine, left and right weeding parts 100s driven by power from a transmission mechanism M1 for traveling and a lifting and lowering device for lifting and lowering the left and right weeding parts 100s are provided and the lifting and lowering device is equipped with an upper transmission case 46 having a transmission mechanism to which engine power is transmitted, a lower transmission case 47 driven by power from the transmission mechanism of the transmission case 46 and a lifting and lowering means 24 for lifting and lowering transmission cases 46 and 47. In the farm working machine, a third transmission case 49 having a third power transmission mechanism driven by power from a transmission shaft 101 provided in a connecting part between the upper transmission case 46 and the lower transmission case 47 is mountably provided and a third weeding part 100c provided between left and right weeding part 100s driven by power from the third power transmission mechanism is installed in the third transmission case 49. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an agricultural machine including a working unit that performs weeding and the like.

Conventionally, a transmission case provided with a transmission mechanism for driving driven by engine power is provided in the center of the vehicle body, a transmission shaft is provided on both sides of the transmission case, and power is transmitted from the transmission shaft to the left and right working parts of the vehicle body. Agricultural machines that perform operations such as weeding of furrows in the working unit are known from Patent Document 1 below.
JP 2004-180532 A

The agricultural machine disclosed in the above-mentioned Patent Document 1 performs the weeding operation of the gutter groove in the working unit, but it was necessary to travel on the field again in order to perform the weeding operation on the ridge. .
Therefore, an object of the present invention is to provide an agricultural machine capable of performing not only the weeding work on the gutter groove but also the weeding work on the gutter.

The problems of the present invention are solved by the following means.
The invention according to claim 1 is provided with an engine (E) mounted on a vehicle body, a traveling transmission mechanism (M1) driven by the engine power, and left and right in the traveling direction of the vehicle body, and the traveling transmission mechanism In a farm work machine provided with a left and right working part (100s, 100s) driven by power from (M1), a lifting device for raising and lowering the left and right working part (100s, 100s) is provided,
The lifting device includes an upper transmission case (46) having a transmission mechanism driven by power from the traveling transmission mechanism, and a lower transmission case (47) driven by power from the transmission mechanism in the upper transmission case (46). ) And elevating means (24) for elevating and lowering these transmission cases (46, 47), and driving force transmission provided at the connecting portion between the upper transmission case (46) and the lower transmission case (47) A third transmission case (49) having a third power transmission mechanism driven by power from the shaft (101) is detachably provided, and the third power transmission (49) includes the third power transmission mechanism. It is an agricultural working machine equipped with a third working part (100c) provided between the left and right working parts (100s, 100s) driven by power from a mechanism.

  The invention according to claim 2 is an agricultural working machine in which the third working part (100c) is provided with an adjusting mechanism for adjusting a position in the left-right direction toward the vehicle body traveling direction.

  According to the first aspect of the present invention, the third working part (100c) provided between the left and right working parts (100s, 100s) is also movable up and down together with the left and right working parts (100s, 100s), and most of them are currently walking. The third working unit (100c) can perform weeding on the fence, which is performed by the mold management machine, and the left working part (100s, 100s) can be used to remove the weeds in the intercostal groove. Since it can be suitably used, weeding work becomes easy.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, work such as weeding on the fence at an appropriate position by adjusting the horizontal position of the third working part (100c). Can do.

Embodiments of the present invention will be described below with reference to the drawings.
First, the overall configuration of the agricultural machine T will be described. In this specification, the left direction and the right direction in the forward direction of the agricultural machine T are referred to as left or right, respectively, the forward direction is referred to as forward, and the reverse direction is referred to as backward.

  As shown in the left side view of FIG. 1, the plan view of the frame configuration of FIG. 2, and the power transmission mechanism diagram of FIG. The two auxiliary frames 12, 12 for mounting the engine E are bridged between the left and right front frames 11, 11, and the rear ends of the front frames 11, 11 are placed in the middle. It connects with the rear frames 14 and 14 via the frames 13 and 13, and the rear-end part of this pair of rear frames 14 and 14 is connected with the rear-wheel support frame 16, and the vehicle body frame frame is comprised.

  Further, the front end portions of the left and right front frames 11 and 11 are connected to each other by a battery mounting plate 17 having an L shape in side view, and a battery B charged by the engine E is placed on and fixed to an intermediate portion of the plate 17. The walking handle 18 having a loop shape in a plan view is attached to the left and right side surfaces of the front frame 11. As a result, the walking handle 18 serves as a bumper that protects the front of the vehicle body when the operator is on the vehicle, or as a narrow guide for distributing a tall crop to the left and right so that the crop is not damaged. Can be used.

  The left and right side portions of the walking handle 18 are provided with clutch levers 22 and 22 for individually turning on and off the steering clutches 45 and 45 (FIG. 3) of the left and right front wheels 20F and 20F. The vehicle is provided with a vehicle stop lever 23 (FIG. 1) that holds both the clutches 45, 45 together.

  Further, a plurality of rods 21 projecting outward from the front frame 11 are installed between the engine mounting auxiliary frames 12 and 12, and the brackets on the rods 21 are lifted and lowered as working machine lifting and lowering actuators. The base of the electric cylinder 24 is attached.

  Further, a handle post 25 is provided behind the engine E, and a riding handle 19 projects from the upper end of the post 25, and is pushed into the post 25 in conjunction with the rotation of the steering shaft 26. A push-pull wire (not shown) to be pulled is provided, and the clutches 45, 45 of the left and right front wheels 20F, 20F are individually turned on and off by pushing and pulling the wire.

  Thus, when the riding handle 19 is turned to the left, the clutch 45 of the left front wheel 20F is turned off, the vehicle is steered to the left with the left front wheel 20F as a fulcrum, and when the handle 19 is turned to the right, the right front wheel 20F The side clutch 45 is disengaged, and the vehicle can be steered to the right with the right front wheel 20F as a fulcrum.

  A step floor 28 is attached above the rear frame 14 to support the cockpit 29 above the step floor 28, and the rear ends of the rear frame 14 are outside the lateral width of the floor 28. The two rear wheel support frames 16 and 16 projecting from each other are connected to each other, and caster type rear wheels 20R are attached to the left and right outer ends of the rear wheel support frames 16 and 16.

  The left and right rear wheels 20R, 20R are connected to a push-pull wire that is pushed and pulled in conjunction with the rotational operation of the steering shaft 26, and are steered to the left and right in conjunction with the rotational operation of the riding handle 19. .

  In addition, a plate member is bridged between the two rear wheel support frames 16 and 16 as a reinforcing member, and a step 30A for getting on and off when getting on and off from the rear of the vehicle body is configured. Further, a plate member protrudes forward also on the rear wheel support arm 31 extending below the frame 16, and constitutes a step 30B for getting on and off when getting on and off from the side of the vehicle body.

  In the agricultural machine T configured as described above, the engine E, the battery B, the transmission case 1 described later, and the like are concentrated on the front of the vehicle body to increase the weight, while the rear of the vehicle body, particularly the rear wheel 20R, Compared with the lighter configuration with a smaller diameter and no drive mechanism, the ground load on the rear wheel 20R is extremely small when the operator gets off.

  Thus, when the operator pushes the walking handle 18 downward and lifts the rear part of the vehicle body with the front wheel 20F as a fulcrum, the operator can operate with as little force as possible, and the operability during the walking operation can be improved.

  2 indicates the left and right center line of the vehicle body, and the traveling system transmission case 1, the cylinder shaft 94 (FIG. 2), and the cockpit 29 are arranged in addition to the engine E on this line. .

  Next, an example of the traveling system power transmission mechanism M1 and the working machine system transmission mechanism M2 of the agricultural work machine T will be described with reference to FIG.

    The traveling system power transmission mechanism M1 transmits the rotation of the output shaft 40 of the engine E through the transmission mechanisms in the belt case 41, the traveling system transmission case 1, and the front wheel support portal case 42 in order from the upper transmission side. The front wheel 20F is driven, and the engine output shaft 40 protrudes outward from the vehicle body on the left and right sides of the engine E, and the rotation of the coaxial 40 is driven by the driving pulley 43a in the belt case 41 and the follower. It is configured to transmit to the input shaft (first shaft 50) of the rear traveling system transmission case 1 via the side pulley 43b and a rubber transmission belt 39 connecting the pulleys 43a and 43b.

  The traveling transmission case 1 is a metal case disposed in the center of the vehicle body and arranged in the front-rear direction. The rotation is input from the input shaft 50 at the upper rear part of the case 1 and the output at the lower front part of the case 1 is input. The rotation is output from the shaft 55.

  The traveling system transmission case 1 has six gear shafts (hereinafter, a first shaft 50, a second shaft 51, a third shaft 52, a fourth shaft 53, a fifth shaft 54, and a sixth shaft 55). Reduction gear sets 56 and 57 are provided between the first shaft 50 and the second shaft 51, and between the second shaft 51 and the third shaft 52, respectively, and the rotation of the first shaft 50 is respectively performed. It is configured to decelerate. In addition, one end of the third shaft 52 protrudes as a work machine system output shaft, that is, a PTO shaft on the other side surface of the case opposite to the one side surface of the case from which the first shaft 50 protrudes. It has the structure which drives the weeding part 100 via the system power transmission mechanism M2.

  The fourth shaft 53 is provided with two travel transmission gears (a first transmission gear 60 for traveling, a second transmission gear 61 for traveling with a two-stage gear), and projects to the side of the handle post 25. Both the gears 60 and 61 are slid on the shaft 53 by the provided main transmission lever 62.

  Then, the travel first transmission gear 60 is moved to the right by the speed change lever 62 and meshed with the reverse low speed gear 63 on the second shaft 51, or the gear 60 is moved to the left to move the third shaft 52. Engage with the forward low-speed gear 65 or move the traveling second transmission gear 61 to the right and mesh with the reverse high-speed gear 64 on the second shaft 51, or move the gear 61 to the left By engaging with the forward high speed gear 66 on the third shaft 52, it is possible to select the first speed among the two front and rear speeds.

  Further, between the fourth shaft 53 and the fifth shaft 54, a high speed gear set 67 for transmitting the rotational speed at a high speed and a low speed gear set 68 for transmitting at a low speed are provided, and the auxiliary transmission clutch 69 on the fifth shaft 54 is operated. The fifth shaft 54 is driven by engaging the clutch pawls of either one of the gear sets 67 and 68 by the forward / backward turning operation of the auxiliary transmission lever on the side of the seat 29.

  With the main and auxiliary transmission mechanisms in the traveling system transmission mechanism M1 configured as described above, the farm work machine T can obtain four forward speeds and four reverse speeds. Furthermore, a reduction gear set 70 is also provided between the fifth shaft 54 and the sixth shaft 55, and the rotation reduced by the main and auxiliary transmission mechanisms is transmitted to the drive-side sprocket 71 provided on the sixth shaft 55. The sprocket support shaft 73 can be driven via the chain C.

  The traveling output shaft 73 at the lower part of the traveling system mission case 1 receives a driven sprocket 72 that meshes with the chain C, and constitutes clutches 45, 45 on the left and right of the shaft that supports the sprocket 72, respectively. The traveling output shaft 74 is provided so as to protrude to the outside of the front frame 11 on the driven shaft side of the clutches 45, 45.

  Further, the traveling output shaft 74 is configured to drive the front wheel axle shaft 76 at the lower portion of the case via the chain C inside the front wheel support portal case 42.

  In the agricultural work machine T configured as described above, the forward shift and the reverse shift can be appropriately switched by rotating the main and sub shift levers, and the clutch lever 22 provided on the walking handle 18 is switched. , 22, the vehicle body can be steered left and right with the clutch 45 being turned on and off and the left and right front wheels 20F being driven.

Next, the working machine system power transmission mechanism M2 provided with the speed change mechanism will be described.
The first rotary case 2 in which the speed change mechanism M2 is housed is configured to be displaced from the center of the vehicle body to the left and right sides, and as shown in FIG. A shaft (work system first shaft 80 to work system fifth shaft 84) is supported.

  Further, in the first rotary case 2, a work system first shaft 80 that is an upper input shaft, a work system second shaft 81 that is mounted parallel to the work system first shaft 80, and a lower work system third The shaft 82 is supported.

  The working system first shaft 80 is configured in a cylindrical shaft shape, and is configured to open the transmission case 1 side and include an internal gear inside. A clutch cylinder 85 having a drive side clutch pawl 85a is slidably fitted to the outer peripheral portion of the cylinder shaft 80, and a driven side clutch pawl 86a meshing with the drive side clutch pawl 85a on the front end side of the coaxial 80. A wide driving gear 86 provided with a shaft is attached.

  Then, the clutch cylinder 85 is slid on the shaft 80 by a shifter (not shown) bearing the upper portion of the case 2, and the rotation transmitted from the rotation of the PTO shaft 52 to the first shaft 80, that is, the first rotary case. 2 is configured to turn on and off the rotation input.

  The work system second shaft 81 is provided with a two-stage gear 88 (a high speed gear 88H and a low speed gear 88L) having two gears so as to be slidable on the same axis 81. A driven gear 89 that meshes with the high-speed gear 88H and the low-speed gear 88L is provided, and the two-stage gear 88 is slid on the shaft 81, thereby rotating the wide gear 86 on the first shaft 80 to the third shaft. 82.

  Further, since the two-stage gear 88 is configured to slide on the shaft 81, when the two-stage gear 88 is slid inside the vehicle body, the driven gear 91 of the third shaft 82 that meshes with the low-speed gear 88L. Power is transmitted at low speed via When the two-stage gear 88 is slid to the outside of the vehicle body, power is transmitted at high speed via the high-speed gear 88H and the driven gear 92 of the third shaft 82 engaged therewith.

  Further, a reduction gear set 93 is provided between the work system third shaft 82 and the work system fourth shaft 83, and the power transmitted through the reduction gear set 93 is an extension shaft inserted into the fifth shaft 84. 9 (output shaft 9) is driven.

  The extension shaft 9 is composed of two shafts connected to the cylindrical shaft 94 by pins (not shown), and the second rotary case 46 is attached to and supported at both left and right ends of the extension shaft 9; It has become.

  The power transmission mechanism M2 of the work machine system rotates the third shaft (PTO shaft) 52 projecting from the side of the transmission case 1 in order from the upper power side in order of the first rotary case 2 (FIG. 1), The transmission is transmitted via the transmission mechanisms in the two rotary cases 46 and 46 and the left and right third rotary cases 47 and 47, and further transmitted to the weeding unit 100.

The weeding unit 100 of this embodiment is a multi-rotary that weeds the weeds on the ridge W or in the ridge. The structure of the weeding unit 100 and its power transmission system will be described with reference to FIG.
The weeding part 100 is composed of three tillage parts consisting of left and right gutter groove weeding parts 100s, 100s and a central weeding top weeding part 100c, and a cultivating claw 37 is attached only to the central weeding part 100c depending on the work. It is configured to work in a state, a state in which the cultivating claw 37 is attached only to the left and right weeding portions 100s, and a state in which the cultivating claw 37 is attached to all three weeding portions. In the example shown in FIG. 4, a state in which the cultivating claw 37 is attached only to the central weeding portion (the weeding weeding portion) 100 c that performs weeding on the reed and the weeds on the reed W are weeded is shown.

  The pair of gutter weeding portions 100s, 100s are integrally formed with the left and right second rotary cases 46, 46 and the third rotary cases 47, 47, respectively, and the gutter weeding portion 100c is formed with the left and right third rotary cases 47, 47. It is composed of a fourth rotary case 48 attached to one of the inner sides, a plurality of transmission shafts, and a fifth rotary case 49.

  Further, the left and right second rotary cases 46, 46 support the end portions of the respective extension shafts 9, 9 through the upper portions thereof, and the rotation of the extension shafts 9, 9 via the rotation of the chains C, C. The power is transmitted to the transmission shafts 101 and 101 below 46. Further, the third rotary cases 47, 47 support the transmission shafts 101, 101 through the upper portions of the cases 47, 47, and rotate the coaxial shafts 101, 101 through the rotation of the chains C, C to the tilling shafts 102, 102 below the case. It is configured to transmit to.

  The ends of the extension shafts 9 and 9 on the substantially central side are connected by a cylindrical shaft 94. The extension shafts 9 and 9 are connected to the lower part of the first rotary case 2 connected to the side surface of the transmission case 1 from the center of the body. Provide almost symmetrically. As shown in FIG. 5, the cylindrical support member 95 of the extension shafts 9 and 9 having bearings 90 is provided outside the first rotary case 2, and the attachment portion of the cylindrical support member 95 to the first rotary case 2 is an inlay. A portion 95a is formed. Therefore, even if the shaft length of the extension shafts 9 and 9 is increased in the inlay portion 95a, the misalignment of the bearing 90 can be minimized.

  Further, as shown in FIG. 1, the piston tip portion of the electric cylinder 24 is connected to the upper portion of the second rotary case 46, and the third rotary case 47 and the vehicle body frame 11 are connected by a plate-like link arm 35. It has become. Accordingly, when the piston of the electric cylinder 24 is expanded and contracted, the second rotary case 46 and the third rotary case 47 are integrated with the weeding portions 100c and 100s provided at the top and bottom, that is, at the bottom of the case 47, while being bent around the transmission shaft 101. It has a configuration that goes up and down.

  In addition, an output shaft 103 that interlocks with the transmission shaft 101 via the chain C is protruded from the lower portion of the fourth rotary case 48, and a cylindrical shaft 104 that transmits power to the upper weeding portion 100c is provided on the output shaft 103. It becomes the composition to connect.

  Further, the fifth rotary case 49 is provided with an input shaft 105 having a plurality of positioning holes 105 a on the upper side of the case 49 and adjusting the amount of insertion of the input shaft 105 with respect to the cylindrical shaft 104. The left and right positions of the five rotary cases 49, that is, the left and right positions of the top weeding portion 100c can be adjusted.

  Since the fourth rotary case 48 and the fifth rotary case 49 provided with a drive force transmission system to the top weeding portion 100c are provided inside one of the left and right third rotary cases 47, 47, the drive force Assembly of the transmission system is facilitated, and the parts cost can be made relatively inexpensive.

  A support rod 107 is spanned on the rotary cover 106 of the left and right third rotary cases 47, and a fifth rotary case 49 is fixed to the support rod 107. Inside the fifth rotary case 49, a chain C is stretched between the upper input shaft 105 and the lower tillage shaft 108, and the rotation of the input shaft 105 is transmitted to the cultivating claw 37 provided on the tillage shaft 108. It is configured to rotate.

  Accordingly, the weeding unit 100 adjusts the working height by adjusting the piston length of the electric cylinder 24 to adjust the working height, and when the farm work machine T includes the first rotary case 2 including the speed change mechanism, Change the rotation speed according to the state of the pods and weed.

  Middle plowing weeding between planting and harvesting of crops of one and two crops is currently carried out mostly by walking-type management machines, and it is heavy labor in areas with large acreage. According to the configuration of the embodiment, weeding on the ridge and weeding of the groove between the ridges can be performed appropriately using a riding type working machine, so that weeding work can be performed easily.

  In addition, in the case where a normal rotary working machine is provided instead of the weeding unit 100, the first rotary case 2 provided with a forward / reverse rotation mechanism is provided. Work can be done by selecting cut tillage.

Further, as is apparent from the side view of FIG. 1, in the present embodiment, the central ridge weeding portion 100c is disposed closer to the front of the aircraft than the left and right ridge groove weeding portions 100s, 100s. The reason for adopting such an arrangement is as follows.
Since the small riding farm machine T of the present embodiment has a rear wheel steering mechanism, the rear of the machine body moves greatly by operating the handle 19. Therefore, the rapid movement of the working machine T due to the handle operation can be suppressed by arranging the above-mentioned weeding portion 100c on the ridge as far as possible in front of the machine body. Moreover, since the top weeding part 100c is located ahead of the worker, the visibility of the working state is improved.

  Each of the left and right weeding portions 100s and 100s includes a rotary cover 106 at the top, and supports a weeder fixing rod 130 in the front-rear direction on the rotary cover 106 via stay members 121 and 121 as shown in FIG. In addition, the right and left fixed rods 130 and 130 respectively corresponding to the left and right weeding portions 100s and 100s are connected by two front and rear connecting rods 107F and 107R. The connecting rods 107F and 107R are configured to connect the rotary cover of the top weeding portion 100c with bolts to the left and right center portions. Further, a front-side connecting rod 107F has a left and right end portion rotatably supporting an arm 131 extending forward, and a tip end portion of the arm 131 is attached to a lower edge portion of the fourth rotary case 48. It has become.

  As a result, it is possible to lift and lower the left and right weeding portions 100s and 100s up and down in the same posture by operating the connecting rods 107F and 107R so as to suspend and support the central weeding weeding portion 100c. Further, when rotational power is input to the fifth rotary case 49 via the drive shaft (103, 104, 105) by the rotating arm 131, the connecting rod 107F, that is, the saddle weeding portion 100c connected thereto, It is restricted from being rotated around the same axis by the rotational torque of the shaft.

  In addition, on the left and right rotary covers 106, 106, a top weeding portion 100 c is arranged in the center of a support rod 107 that can be adjusted to the left and right in three divisions, and the length of the support rod 107 can be adjusted. It has become. In addition, a fifth rotary case 49 is attached via an input shaft 105 that can adjust the insertion length into the cylindrical shaft 104 arranged in a position parallel to the support rod 107. That is, the input shaft 105 is provided with a plurality of mounting holes 105a along the axial direction. By passing through a through pin through one of the mounting holes 105a and the through hole on the cylindrical shaft 104 side, the input shaft 105 The mounting position is fixed. The support support rods 107F and 107R are also provided with a plurality of through-holes 107a along the axial direction, and pass through one of the through-holes 107a and the mounting hole 130a1 provided in the connecting portion 130a of the weeder fixing member 130. The mounting position is fixed by penetrating and supporting the pin 109. Thereby, the position of the said top weeding part 100c can be adjusted according to the position of a planting crop.

  Therefore, even if the positions of the tread and the left and right weeding parts 100s, 100s change in a field having different ridge widths, the central weeding part 100c can always be arranged at the center part of the body, so that the work adaptability is good.

  The second rotary case 46 and the link arm 35 are configured to move up and down the weeding unit 100 as an arm constituting a parallel link mechanism. As shown in the perspective views of the main part in FIGS. 7 (a) and 7 (b). In the connecting portion between the third rotary case 47 and the second rotary case 46 to which the driving force of the drive system in the second rotary case 46 is transmitted adjacent to the second rotary case 46, either one of the cases 46 or 47 In the other case 47 or 46, one bolt 137 in the case alignment bolt is set to a length that serves as a scale indicator for the plowing depth display portion.

  Thus, by utilizing the fact that the connecting portions of the two rotary cases 46 and 47 are rotated at different angles when the weeding unit 100 is raised and lowered by the parallel link, the tilling depth of the weeding unit 100 can be displayed with a simple configuration.

  FIG. 8 shows a side view of a farm work machine T according to another embodiment of the present invention, FIG. 9 shows a side view of the main part, and FIG. 10 shows a plan view of the main part. In the agricultural machine T shown in FIG. 8, the same components as those of the agricultural machine T shown in FIG.

  In this embodiment, the plowing depth of the weeding unit 100 is adjusted by adjusting the rotation angle of the connecting portion of the two rotary cases 46 and 47 when the weeding unit 100 is raised and lowered.

  A pair of second frames 142 and 142 intersecting with a pair of first frames 141 and 141 whose ends are rotatably supported by the airframe are provided, and both frames 141 and 142 are freely rotated at the intersection. Both frames 141 and 142 are connected by a rotation fulcrum 143, and the end of the second frame 142 is rotatably supported on the tip of the rod 24 a of the cylinder 24. Also, a female screw portion 147 is provided on one of the connecting member 145 of the pair of first frames 141 and 141 and the connecting member 146 of the pair of second frames 142 and 142 (the first frame 141 in FIG. 10), and the other The connecting member 146 is provided with a hole 148 through which the male screw of the rod 150 described below passes. Further, a rod 150 having a male screw is provided so as to penetrate both the female screw portion 147 and the hole 148. An adjustment knob 150a is provided at the end of the rod 150, and a stopper 151 is provided at the other end. In addition, a stopper 152 is also provided between the connecting member 145 having the female screw portion 147 and the adjustment knob 150a of the rod 150 to prevent the knob-side rod 150 from being detached from the connecting member 145 having the female screw portion 147. It has become.

  The rod 150 is inserted so as to penetrate both the female screw portion 147 and the hole 148, and the male screw portion of the rod 150 meshes with the female screw portion of the female screw portion 147. By rotating 150a, the crossing angle of the first frame 141 and the second frame 142 at the rotation fulcrum 143 can be adjusted. If the crossing angle is too acute, the connecting member 146 having the hole 148 comes into contact with the stopper 151 to restrict the crossing angle at the rotation fulcrum 143 of the first frame 141 and the second frame 142 within a certain range. it can.

  Further, a torque spring 154 is disposed on the connecting member 145 having the female screw portion 147 so that the rod 150 is tensioned. With the spring 154, even if the cylinder 24 expands and contracts, the change in the inclination of the rod 150 is small, so that the rotation angle of the connecting portion of the two rotary cases 46 and 47 can be easily adjusted. There is no big change. Furthermore, since the pair of first frames 141 and 141 covers both sides of the cylinder 24, the cylinder 24 is also protected.

  Thus, the rotation angle of the connecting portion of the two rotary cases 46 and 47 when the weeding unit 100 is raised and lowered can be easily adjusted by the rotation of the rod 150.

  The present invention can be applied to an agricultural machine having a working unit that performs weeding and the like.

1 is an overall side view of an agricultural machine according to an embodiment of the present invention. It is a top view which shows the flame | frame structure of the agricultural machine of FIG. It is a power transmission mechanism diagram of the agricultural working machine provided with the speed change mechanism of FIG. It is sectional drawing of the rotary case which shows the transmission structure of the working part of the agricultural working machine of FIG. It is a partially expanded sectional view of extension shaft vicinity provided through the 1st rotary case of the agricultural machine of FIG. It is a partial perspective view of the transmission member to the 4th rotary case of the agricultural working machine of FIG. It is a principal part perspective view of the 2nd rotary case and 3rd rotary case of the agricultural working machine of FIG. It is a side view of the agricultural working machine of the other Example of this invention. FIG. 9 is a partially enlarged view of FIG. 8. FIG. 9 is a partially enlarged plan view of FIG. 8.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling system mission case 2 First rotary case 9 Output shaft (extension shaft) 11 Front frame 12 Auxiliary frame 13 Intermediate frame 14 Rear frame 16 Rear wheel support frame 17 Battery mounting plate 18 Walking handle 19 Riding handle 20F Front wheel 20R Rear Wheel 21 Rod 22 Clutch lever 23 Vehicle stop lever 24 Lifting electric cylinder 24a Rod 25 Handle post 26 Steering shaft 28 Step floor 29 Pilot seat 30A, 30B Step for getting on / off 31 Rear wheel support arm 35 Link arm 37 Culch claw 39 Transmission belt 40 Output shaft 41 Belt case 42 Front wheel support portal case 43a Driving pulley 43b Driven pulley 45 Steering clutch 46 Second rotary case 47 Third rotary case 48 Fourth rotary case 4 Fifth rotary case 50 first shaft (input shaft)
51 Second shaft 52 Third shaft 53 Fourth shaft 54 Fifth shaft 55 Sixth shaft (output shaft) 56, 57 Reduction gear set 60 Traveling first transmission gear 61 Traveling second transmission gear 62 Main transmission lever 63 Reverse drive Low speed gear 64 reverse high speed gear 65 forward low speed gear 66 forward high speed gear 67 high speed gear set 68 low speed gear set 70 reduction gear set 71 driving side sprocket 72 driven side sprocket 73 sprocket support shaft 74 traveling output shaft 76 front wheel axle Axis 80 Work system first shaft 81 Work system second shaft 82 Work system third shaft 83 Work system fourth shaft 84 Work system fifth shaft 85 Clutch cylinder 85a Drive side clutch pawl 86a Drive side clutch pawl 86 Drive gear 88 Two Step gear 88H High speed gear 88L Low speed gear 89 Driven gear 90 Bearing 91 Driven gear 92 Driven gear 93 Reduction gear set 94 Cylinder shaft 95 Cylinder Supporting member 95a Inlay part 100 Weeding part 100s Groove weeding part 100c Upside weeding part 101 Transmission shaft 102 Tilling shaft 103 Output shaft 104 Tube shaft 105 Input shaft 105a Positioning hole 106 Rotary cover 107 Support rod 107a Through hole 108 Tilling shaft 121 Connection Member 130 Weeder fixing rod 130a Connection portion 130a1 Mounting hole 131 Arm 136 Plowing depth display portion 137 Bolt 141 First frame 142 Second frame 143 Rotating fulcrum 145, 146 Connection member 147 Female thread portion 148 Hole 150 Rod 150a Knob 151 152 Stopper 154 Torque spring B Battery C Chain E Engine T Agricultural work machine M1 Traveling system power transmission mechanism M2 Working machine system transmission mechanism

Claims (2)

An engine (E) mounted on the vehicle body, a driving transmission mechanism (M1) driven by the engine power, and provided on the left and right in the vehicle body traveling direction, are driven by the power from the driving transmission mechanism (M1). In the agricultural machine with left and right working parts (100s, 100s)
A lifting device for lifting the left and right working parts (100s, 100s);
The lifting device includes an upper transmission case (46) having a transmission mechanism driven by power from the traveling transmission mechanism (M1), and a lower transmission driven by power from the transmission mechanism in the upper transmission case (46). A case (47) and an elevating means (24) for elevating and lowering these transmission cases (46, 47);
A third transmission case (49) having a third power transmission mechanism that is driven by power from a driving force transmission shaft (101) provided at a connecting portion between the upper transmission case (46) and the lower transmission case (47). ) For free wearing,
The third transmission case (49) is provided with a third working part (100c) provided between the left and right working parts (100s, 100s) driven by power from the third power transmission mechanism. Agricultural machine characterized by that.   The farm working machine characterized in that the third working unit (100c) includes an adjustment mechanism that adjusts the position in the left-right direction toward the vehicle body traveling direction.

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