JP2006246859A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type rice transplanter equipped with a steering post having excellent operability. <P>SOLUTION: The riding type rice transplanter has a constitution that a planting part is liftably and lowerably connected to the rear of a traveling part, a machine body frame at the front edge part of the traveling part is equipped with the steering post and a steering wheel is mounted on the upper part of the steering post. An engine is installed between the point of a vertical line dropped from the end part of the position of the steering wheel in riding and operation to the machine body frame and the point of the machine body frame of the steering post to compact the machine body frame. The upper part of he steering post is preferably turnable between a seat and the vicinity of the front end of the traveling part and the steering post having a reclinable structure may be excellently made. A bevel gear is mounted on the upper part of the steering post to preferably turn the upper part of the steering post. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steering post and a steering wheel portion of a traveling portion of a riding rice transplanter, and the like, which mainly has a function of preventing the traveling portion from being lifted, similarly to an arm body provided at a front end portion of a conventional riding rice transplanter. .

  Conventionally, as a form of riding rice transplanter, there is one in which a planting part is connected to a rear position of a traveling part so as to be movable up and down, and an arm body is attached to a front end of the traveling part.

  The arm body can be rotated between a use position that protrudes forward and a non-use position that rises upward, for example, when the machine body is moved over the shore so as to escape from the field. In addition, the operator can get off the airframe and move up to the heel, and can also prevent the front part of the airframe from being lifted by rotating the arm body to the use position and pressing the arm body downward. It was like that.

Technologies related to this are disclosed, for example, in Patent Documents 1 and 2 below.
JP 2000-135209 A JP 2000-127983 A

  However, in the riding rice transplanter disclosed in Patent Document 1 and the like, the arm body can be prevented from being lifted by pressing the arm body downward. However, when the body is escaped from the field, When the front part of the machine body is pulled up through the arm body, the arm body turns upward, and it is difficult to lift the machine body through the arm body.

  Further, since the arm body is provided exclusively, the number of parts increases and there is an economical loss.

  Therefore, the present invention provides a function that can control the traveling of the aircraft from the front end of the riding rice transplanter by using the steering post and the steering wheel of the traveling portion of the riding rice transplanter and at the same time prevent the traveling portion from being lifted. The main issue is to provide the products.

  The riding rice transplanter of the present invention is a riding rice transplanter in which a planting part is connected to a rear part of a traveling part so as to be movable up and down, a steering post is provided on a body frame at a front end of the traveling part, and a steering wheel is provided on an upper part of the steering post. The aircraft frame is made compact by installing an engine between the vertical point dropped from the rearmost end of the steering wheel position during riding operation to the frame and the point on the frame of the steering post. It is a thing.

  Further, the upper portion of the steering post is preferably a steering post having a tiltable structure so as to be rotatable between the seat and the vicinity of the front end of the traveling portion.

  Further, the upper part of the steering post is preferably provided with a bevel gear, and the upper part is rotated to transmit the rotational force of the steering wheel.

  According to the first aspect of the present invention, since the engine is installed between the perpendicular point lowered from the rearmost end portion of the steering wheel position during the riding operation to the body frame and the point on the body frame of the steering post, the traveling vehicle The traveling vehicle can be made compact without extending the overall length of 1, and an ideal steering angle can be achieved during traveling and operation, so that operability and comfort can be improved.

  According to the second aspect of the present invention, since the upper part of the steering post is rotatable between the seat and the vicinity of the front end portion of the traveling unit, the steering post has a tiltable structure. The vehicle can be operated from a position away from the vehicle. For example, when the machine body is to be overtaken to escape from the field, the operator can get off the traveling vehicle and operate the steering wheel 15. Also, when unloading the rice transplanter to the truck, when the rice transplanter is unloaded from the truck, the traveling vehicle can be moved back from the front and operated from the front of the vehicle. When the rice transplanter is loaded, the traveling vehicle must be Since the vehicle can be moved forward and operated from the front of the traveling vehicle, operability during loading and unloading work on the truck is improved.

  Further, when the traveling vehicle is lifted from the front of the traveling vehicle, it is possible to prevent the traveling vehicle from being lifted by pushing down the steering wheel. Further, the maintenance of the engine unit is improved by rotating the steering post toward the front side of the traveling vehicle.

  According to the invention of claim 3, the rotation of the upper part of the steering post is provided with a bevel gear, and the upper part is rotated to transmit the rotational force of the steering wheel. Can be set.

  Embodiments of the present invention will be described below with reference to the drawings.

  A shown in FIG. 1 is a riding rice transplanter according to the present invention. The riding rice transplanter A is connected to a rear position of the traveling unit 1 through a lifting mechanism 3 so that the planting unit 2 can be moved up and down. .

  As shown in FIG. 1, the traveling vehicle 1 is provided with a prime mover portion 5 on the front portion and a driving portion 6 at a rear position of the prime mover portion 5 on the fuselage frame 4. A transmission case 7 extending in the direction and interlockingly connected with the engine E of the prime mover unit 5 is disposed, and a pair of left and right front wheels 8 and 8 are interlockingly connected to the front part of the transmission case 7 via front axle cases 21 and 21. In addition, a pair of left and right rear wheels 9, 9 are interlocked and connected to the rear part of the transmission case 7.

  As shown in FIG. 1, the body frame 4 includes a pair of left and right front and rear extension frame forming pieces 10 and 10 extending in the front and rear direction, and the left and right sides of the mission case 7 from the rear ends of the front and rear extension frame forming pieces 10 and 10. Inclined frame forming pieces 11 and 11 extending obliquely toward the rear, and left and right extending frame forming pieces 12 horizontally mounted between the upper end portions of both inclined frame forming pieces 11 and 11, are provided. The rear portions 10a and 10a of the formed pieces 10 and 10 are inclined to extend rearward and upward.

  As shown in FIG. 1, the driving unit 6 is provided with a steering column 13 at a position immediately before the prime mover unit 5, a steering post 70 is erected in the steering column 13, and a steering wheel is provided at the upper end of the steering post 70. 15, the engine E is disposed behind the steering post 70, and the seat 16 is disposed behind the engine E.

  That is, the engine is installed between the point of the perpendicular line dropped from the rearmost end of the steering wheel to the body frame during riding operation and the point on the body frame of the steering post so that the traveling vehicle 1 does not extend the entire length. The vehicle can be made compact, and an ideal steering angle can be obtained during running and operation, so that operability and comfort can be improved.

  The steering post 70 includes a lower fixed portion 72 and an upper rotating portion 74, and a gear portion 90 between the fixed portion 72 and the upper rotating portion 74.

  As shown in FIG. 1, the steering post 70 can be rotated to the use positions (A), (B), and (C).

  A shift lever 17 for performing a shift operation of the traveling unit 1 and a clutch / brake lever 18 that can perform a clutch operation and a brake operation from outside the airframe are respectively provided on the panel 80 above the steering column 13. While being provided so as to be swingable in the front-rear direction, the planting lift lever 19 and the differential lock lever 20 for performing the lifting operation of the planting part 2 can be swingably operated in the front-rear direction at the right side position of the seat 16. Provided.

  The planting lift lever 19 may be provided on the panel 80 in the same manner as the above-described shift lever 17 and the like, so that the planting lift lever 19 can be operated at an intermediate use position (b) of the steering wheel 15. Further, the differential lock lever 20 may be disposed on a step covering the body frame 4 as a stepping pedal type.

  Further, a steering mechanism 22 is interposed between the lower end of the fixed portion 72 at the lower portion of the steering post 70 and the front end portions of the front axle cases 21 and 21 (see FIG. 3).

  In other words, the steering mechanism 22 moves the middle part of the steering operation arm 24 up and down on the support frame 23 interposed between the front part of the pair of left and right front and rear extension frame forming pieces 10 and 10 and the front end part of the transmission case 7. The arm pivot shaft 25 is pivotally supported by an arm pivot shaft 25, and an arcuate internal gear 26 centering on the arm support shaft 25 is connected to the rear portion of the steering operation arm 24. A small gear 27 attached to the lower end portion of the steering post 70 is engaged with the toothed gear 26.

  A pair of left and right tie rods 29 and 29 are interposed between the left and right sides of the front end of the steering operation arm 24 and the knuckle arms 28 and 28 provided at the front ends of the front axle cases 21 and 21, respectively.

  In this manner, in the steering mechanism 22, the steering operation arm 24 is rotated about the arm support shaft 25 in conjunction with the rotation operation of the steering wheel 15, and the pair of left and right tie rods are interlocked with the steering operation arm 24. 29 and 29 are pushed and pulled, and the front end portions of the front axle cases 21 and 21 are rotated via the knuckle arms 28 and 28 so that the steering operation of the pair of left and right front wheels 8 and 8 is performed.

  As shown in FIG. 6, the transmission case 7 is provided with a pair of left and right front wheel drive shafts 30, 30 with the axis lined in the left-right direction at the front, A differential lock mechanism 32 is disposed in the vicinity of the differential mechanism 31 with a mechanism 31 interposed therebetween, and a lower end portion 33a of an operation shaft 33 provided on the differential lock mechanism 32 projects downward from the transmission case 7 to The intermediate portion of the interlocking lever 44 extending in the left-right direction is connected to 33 a, and the differential lock lever 20 provided in the operating portion 6 is interlockedly connected to the negative side end portion of the interlocking lever 44 via the interlocking wire 45.

  An input shaft (156) is pivotally supported in the left-right direction at the upper part of the transmission chamber of the transmission case (7).

  As shown in FIG. 4, the left end portion of the input shaft (156) protrudes outward and the driven pulley (155) is fixed, and the output shaft (152) protrudes laterally from the left side surface of the engine E. The power from the fixed drive pulley (153) is input into the transmission case (7) via the belt (154). The belt (154) is configured to be tensioned by a tension roller (158) attached to the tip of the tension arm (157). The belt clutch (154) can be depressed by the main clutch pedal (174) or the clutch / brake lever (18). The power is connected and disconnected in conjunction with the shift operation.

  In addition, as described above, the tension of the belt (154) that transmits power from the engine E to the transmission case (7) by the operation of the main clutch pedal (174) and the clutch / brake lever (18) is in the “off” state. It is configured to be able to. That is, as shown in FIG. 4, when the main clutch pedal (174) is depressed, a pressing member (145) such as a pin attached to an L-shaped bracket (144) fixed to the pedal support (174a) By pushing the cam (146) fixed to the rotation shaft (159) of the tension arm (157), the tension arm (157) is rotated downward, and the belt tension can be set to the “cut” state.

  As shown in FIG. 4, a long hole (140a) is provided in the interlocking rod (140) pivotally supported by a bracket (142) provided on the pivot shaft (141) of the clutch / brake lever (18). Is inserted, and a fitting member (143) such as a pin projecting from a tension arm (157) for "entering" or "cutting" the belt tension is inserted through the elongated hole (140a). Therefore, when the clutch / brake lever (18) is rotated backward in the direction of the arrow shown in the drawing, the interlocking rod (140) moves downward and the fitting member (143 inserted through the elongated hole (140a) is inserted. ) To rotate the tension arm (157) downward to release the tension roller (158) attached to the tension arm (157) from the belt (154), thereby turning the belt tension to the “off” state. Can do. Even if the main clutch pedal (174) is depressed, the fitting member (143) of the tension arm (157) only moves within the long hole (140a) formed in the interlocking rod (140). 18) has no effect, and operating the clutch / brake lever (18) has no effect on the main clutch pedal (174).

  Further, as shown in FIG. 4, a brake member (147) for stopping the rotation of the driven pulley (155) on the mission case (7) side is fixed to the tension arm (157). 147) is configured to press the driven pulley (155) when the tension arm (157) rotates downward. The pressing portion of the brake member (147) is composed of an elastic body (149) such as rubber urged toward the driven pulley (155) by a spring (148) or the like (see FIG. 5). It is configured to be more retractable. Thus, when the elastic body (149) of the brake member (147) presses the driven pulley (155) to stop the rotation and the entire body is braked, the traveling vehicle (1) can be moved even on a slope. Can be stopped.

  As described above, the interlocking rod (140) pivotally supported by the bracket (142) moves downward, and the tension arm (157) is moved through the fitting member (143) inserted through the long hole (140a). By rotating downward, the tension roller (158) attached to the tension arm (157) can be separated from the belt (154), and the belt tension can be set to the “off” state (see FIG. 4).

  The tension arm (157) is biased by a spring so as to rotate upward, but since a stopper is added to the clutch / brake lever (18), the tension arm (157) rises in this situation. Never do.

  The bracket (142) is provided with a swing member (190) pivotally supporting a swing pin (192), and the bracket (142) is provided with a lateral hole (142h). A wire (200) is stretched around the swing pin (192), and the wire (200) is connected to the lever (212) of the rod (210) (FIG. 4).

  The wire (200) can be pulled by grasping the lever (212). The tip of the wire (200) is not fixed, and the engaging member (214) of the rod (210) can be hooked at a free place, and can be moved to the front end or the rear end of the traveling vehicle. In this way, the clutch can be operated from the front or rear of the aircraft.

  By pulling the wire (200) in this way, the swing pin (192) pivotally supported by the swing member (190) moves along the horizontal hole (142h) in the right direction in the drawing, and the interlocking rod (140 ) Tilts to the right, and the fitting member (143) inserted through the elongated hole (140a) also rises to the upper right.

  As a result, the tension arm (157) is also rotated upward, and the belt tension is set to “ON”. Further, since the tension arm (157) rotates upward, the brake member (147) pressing the driven pulley (155) is retracted from the pressing side to release the stop of the rotation of the driven pulley (155). Rotational force is transmitted.

   The roller (202) is for tensioning the wire (200), and the spring (194) is laid on a swing member (190) that pivotally supports a swing pin (192). When the swing pin (192) pivotally supported by the swing member (190) moves in the right direction, a spring force for returning to the left direction is urged.

  On the other hand, if the tension of the wire is loosened, the belt tension becomes “cut”.

  That is, when the swinging pin (192) loosens the pulling force of the wire (200), the swinging member (190) pivotally supporting the swinging pin (192) by the spring (194) is moved to the left in the drawing. It moves to the left along the horizontal hole (142h) and returns to the original position. As a result, the interlocking rod (140) is released from the right inclination and returned to the original position, and the fitting member (143) inserted through the elongated hole (140a) is also lowered to return to the original position.

  As a result, the tension arm (157) is also rotated downward, and the belt tension is set to “OFF”. Further, since the tension arm (157) rotates downward, the brake member (147) returns to the original state, presses the driven pulley (155), and stops the rotation of the driven pulley (155).

  The diff lock operation wire 64 is connected to the diff lock pin 62 of the rotating portion 74, the other end of the diff lock operation wire 64 is connected to the front end portion of the diff lock interlocking wire 65, and the rear end portion of the differential lock interlocking wire 65 is connected to the differential lock operating wire 64. As shown in FIG. 6, it is connected to the other end of the interlocking lever 44 provided at the lower end 33 a of the operation shaft 33 of the differential lock mechanism 32.

  From the use position (A) to the use position (B) (see FIG. 6), only the play portion of the differential lock operation wire 64 is pulled, but the rotation part 74 is used from the use position (B). In the position (c), the diff lock operation wire 64 pulls the diff lock interlocking wire 65 to perform the diff lock operation. On the contrary, the diff lock operation wire is in the diff lock state from the use position (A) to the use position (B). The pull of the interlocking rod 65 is relaxed, and the diff lock releasing operation is performed.

  When returning from the use position (c) to the use position (b), it is rewound by a spring-wound winding means (not shown) wound with a wire.

  As a result, at the use position (c), the steering wheel 15 and the wheel can be locked, the direction of the wheel can be fixed, and the diff lock operation can be performed with the diff lock operation wire.

  The above operation is an embodiment in which the rotation of the tension arm (157) and the pressing operation of the driven pulley (155) of the brake member (147) are interlocked, but the driven pulley (155) of the brake member (147) The airframe can be run or stopped only by the pressing operation.

  That is, the pressing portion of the brake member (147) is composed of an elastic body (149) such as rubber urged toward the driven pulley (155) by the spring (148). Specifically, the brake member (147) is provided with a core rod (184) in the center, a cylindrical member (188) is provided on the rear end side, and a spring (148) is wound around the core rod (184) on the tip side from the cylindrical member (188). An elastic body (149) is provided at the tip.

  As shown in FIG. 1, the planting unit 2 arranges a seedling stage 36 on a planting mission case 35 and places a seedling mat (not shown) on the seedling stage 36. The mat is cut into a seedling block by a planting claw 37 interlocked with the planting mission case 35, and the seedling block is planted in the field. Reference numeral 38 denotes a float.

  An input shaft 39 is projected forward from the planting mission case 35, and the input shaft 39 and the PTO shaft 40 provided in the transmission case 7 are linked and connected via a transmission shaft 41.

  As shown in FIG. 1, the elevating mechanism 3 includes a top link 42, a pair of left and right lower links 43, 43, and an elevating cylinder (not shown) that moves the links 42, 43, 43 up and down. And the planting part 2 can be raised / lowered in the back position of the driving | running | working part 1 by extending-contracting the raising / lowering cylinder.

  Next, an embodiment of the present invention will be described. Since the steering post 70 in FIG. 1 is provided with a gear portion 90 between the fixed portion 72 and the upper rotating portion 74, as shown in FIG. ), (C) can be rotated to the use position.

  First, the use position of (a) is a position where the operator sits on the seat 16 and operates (b), and the operator can operate from a position away from the vehicle in front of the vehicle after getting off the traveling vehicle 1. It is.

  For example, when letting the machine body escape from the field, the operator can get off the machine body and operate the steering wheel 15. Also, when unloading the rice transplanter to the truck, when the rice transplanter is unloaded from the truck, the steering post 70 is rotated to the (C) use position, and the back of the traveling vehicle is operated from the front of the vehicle. When the traveling vehicle is loaded, the operability is improved because the operation is possible from the front of the traveling vehicle.

  Further, in the (C) use position, when the traveling vehicle is lifted, the steering wheel 15 is pushed down to prevent the traveling vehicle from being lifted.

  The use position of (b) of the steering post 70 in FIG. 1 is not a fixed position, and the position of the steering post 70 can be freely changed. With such a configuration, a free driving operation is possible.

  Since the steering post 70 can be changed to the (C) use position or the (B) use position, the steering wheel 15 is so-called tilted, and maintenance such as inspection of the engine can be easily performed.

  As shown in FIG. 1, the fixing portion 72 and the gear portion 90 of the steering post 70 are provided in front of the engine E, and the engine E is provided between the seat 16 and the fixing portion 72 and the gear portion 90 of the steering post 70. The traveling vehicle 1 can be made compact without increasing the overall length of the traveling vehicle 1, and an ideal steering angle can be obtained during traveling and operation, so that operability and comfort can be improved.

  2 is a perspective view of FIG. 1. The steering post 70 can be changed to the use positions (A), (B), and (C), and the panel 80 is also rotated together with the steering post 70. FIG. Therefore, when the operator performs each operation when getting on or off the vehicle, it is possible to always provide a shift lever 17, a clutch / brake lever 18, an accelerator, etc. as a panel and an operation unit in the vicinity of the steering wheel 15. Yes, operability can be improved. When it is impossible to work on a wetland or the like, the steering post 70 can be planted while getting off and operating the steering wheel at the (B) use position. It can be used to prevent lifting.

  FIG. 7 is a detailed view of the steering post 70 portion of FIG. The steering post 70 is fixed to the body frame 4 by a lower fixing portion 72. Further, the upper rotating portion 74 can be used between the use positions (A) and (C) via the gear portion 90.

  FIG. 8 is a schematic diagram showing an embodiment of the gear unit 90. The gear unit 90 includes a lower box 92 and an upper box 94. The relationship between the lower box 92 and the upper box 94 is such that the lower box 92 fits into the upper box 94 and the upper box 94 is large enough to rotate about the central axis 102. .

  Here, the shape of the lower box 92 is preferably (A) in FIG. 9, and the shape of the upper box 94 is preferably (B) in FIG. In the lower box 92, as shown in FIG. 9A, the side plate 92A and the side plate 92C are erected with the same dimensions, and the low side plate 92B and the side plate 92D are connected between the side plate 92A and the side plate 92C. . Reference numeral 92E denotes a bottom plate, which is joined to the end of each side plate at the bottom of the four side plates. A hole 92AH for supporting the central shaft 102 of the intermediate bevel gear 98 is opened in the central portion of the side plate 92A, and a hole 92CH for supporting the central shaft 102 of the intermediate bevel gear 98 is also provided in the central portion of the side plate 92C. Is open. A hole 92EH that supports the central shaft 104 of the lower bevel gear 96 is opened inside the bottom plate 92E.

  In the upper box 94, as shown in FIG. 9A, the side plate 94A and the side plate 94C are erected with the same size, and the side plate 94B and the side plate 94D of the same size are connected to the upper part between the side plate 94A and the side plate 94C. ing. 94E is a top plate, which is joined to the end of each side plate at the top of the four side plates. A hole 94AH for supporting the central shaft 102 of the intermediate bevel gear 98 is opened inside the side plate 94A, and a hole 94CH for supporting the central shaft 102 of the intermediate bevel gear 98 is opened inside the side plate 94C. is doing. Inside the top plate 94E, a hole 94EH that supports the central shaft 106 of the upper bevel gear 100 is opened.

FIG. 8 is a schematic view showing an embodiment of the gear unit 90 using the lower box 92 and the upper box 94 of FIG. The gear portion 90 is provided with a lower bevel gear 96 at the tip of the central shaft 104 that is pivotally supported in the fixed portion 72 of the steering post 70.
On the other hand, an upper bevel gear 100 is provided at the tip of the central shaft 106 that is pivotally supported in the rotating portion 74 of the steering post 70.

  An intermediate bevel gear 98 is provided between the lower bevel gear 96 and the upper bevel gear 100 so that the rotational force of the upper bevel gear 100 can be transmitted to the intermediate bevel gear 98 and further to the lower bevel gear 96. Meshed. The intermediate bevel gear 98 is pivotally supported by the central shaft 102 of the lower box 92 and the upper box 94 that is fitted in the hole 92CH and hole 94CH and the hole 92AH and hole 94AH.

  The lower box 92 is fixed, but the upper box 94 is rotated about the central axis 102 and can be rotated from the use position (A) to (C) of the steering wheel 15.

  The upper ends of the side plates 92B and 92D of the lower box 92 serve as stoppers for the central shaft 106 pivotally supported in the rotating portion 74 of the steering post 70, and do not rotate downward any further. . The stopper may be one that restricts the rotation range by a general arm, for example. Further, the side plates 94B and 94D of the upper box 94 may perform the same rotation restricting function.

FIG. 10 is a schematic diagram for explaining the regulation of the central shaft 102 and the regulation of the intermediate bevel gear 98. FIG. 10A shows the first embodiment, and 110 is a knob, which is supported outside the central shaft 102. Inside the lower box 92 and the upper box 94, a restriction receiving member 112 and a restriction member 114 are pivotally supported on the central shaft 102. Then, by rotating the knob 110 in the right direction, the restriction member 114, the central shaft 102, and the intermediate bevel gear 98 are moved in the left direction as indicated by the arrow, and the restriction member 114 is moved to the restriction receiving member 112. The intermediate bevel gear 98 is in pressure contact with the lower bevel gear 96 and the upper bevel gear 100 and is in a so-called steering lock state, thereby restricting the rotation of the central shaft 102. As a result, the handle and wheels can be locked and released.
Also, since the lock can be placed at any position, the wheel can be locked when necessary, such as over the ridge or loading / unloading onto a truck.

  FIG. 10B shows an example in which the restriction of the central shaft 102 and the restriction of the intermediate bevel gear 98 can be individually implemented.

The relationship between the central shaft 102 and the intermediate bevel gear 98 as each bevel gear, the lower bevel gear 96 and the upper bevel gear 100 is the same as that in FIG.
Reference numeral 110 denotes a knob that is pivotally supported outside the central shaft 102. A regulating member 116 is pivotally supported on the central shaft 102 inside the lower box 92 and the upper box 94. The gear restricting member 118 is also supported on the central shaft 102 between the intermediate bevel gear 98 and the side surface of the lower box 92.

  As shown in the figure, the center shaft 102 has a right-hand thread on the regulating member 116 side, and a left-hand thread on the intermediate bevel gear 98 side.

  Then, by rotating the knob 110 in the right direction, the regulating member 116 and the central shaft 102 move to the left in the direction of the arrow (1), and the regulating member 116 is connected to the lower box 92 and the upper box 94. The movement of the upper box 94 can be restricted by moving toward the side surface and press-contacting both. Thereby, rotation of the rotation part 74 of the steering post 70 can be regulated.

  Conversely, by rotating the knob 110 leftward, the gear restricting member 118 moves leftward as indicated by the arrow (2), and the gear restricting member 118 moves toward the side surface of the intermediate bevel gear 98. Then, the intermediate bevel gear 98 is brought into pressure contact with the lower bevel gear 96 and the upper bevel gear 100 to enter a so-called steering lock state, and the rotation of the central shaft 102 is restricted. As a result, the handle and wheels can be locked and released.

  Also, since the lock can be placed at any position, the wheel can be locked when necessary, such as over the ridge or loading / unloading onto a truck. If the steering post 70 locks the wheel at the position (c) in FIG. 1, the operator can stand up at the front of the traveling vehicle and lift the vehicle or hold the lifted vehicle down.

  As described above, the riding rice transplanter according to the present invention includes the steering post having excellent storability and operability, and is therefore useful for rice planting work.

The side view of the riding rice transplanter which concerns on this invention. The perspective view of FIG. FIG. 3 is a plan view showing a portion of a steering mechanism 22. The side view of a main clutch lever and a main clutch pedal. The top view of the main clutch lever and main clutch pedal of FIG. Explanatory drawing of the mechanism of a diff lock. The rotation detailed view of the steering post 70 part. The schematic diagram which showed the Example of the gear part 90. FIG. (A) is a perspective view showing the shape of the upper box 94 (B) of the lower box 92. (A) is a schematic diagram showing the regulation of the central shaft 102 and the regulation of the intermediate bevel gear 98, and (B) is a schematic diagram showing the regulation of the central shaft 102 or the regulation of the intermediate bevel gear 98.

Explanation of symbols

A Passenger rice transplanter E Engine 1 Traveling vehicle 2 Planting part 3 Lifting mechanism 4 Airframe frame 5 Motor part 6 Driving part 7 Mission case 8 Front wheel 9 Rear wheel 10 Front and rear extension frame formation piece 10a Front and rear extension frame formation piece rear part 12 Left and right extension Frame forming piece 13 Steering column 15 Steering wheel 16 Seat 17 Shift lever 18 Clutch / brake lever 19 Planting lift lever 20 Differential lock lever 21 Front axle case 22 Steering mechanism 23 Support frame body 24 Steering operation arm 25 Arm support shaft 26 Internal gear 27 small gear 28 knuckle arm 29 tie rod 30 front wheel drive shaft 31 differential mechanism 32 differential lock mechanism 33 operation shaft 33a lower end 35 planting mission case 35
36 seedling stage 37 planting claw 38 float 39 input shaft 40 PTO shaft 41 transmission shaft 42 top link 43 lower link 44 interlocking lever 62 differential lock pin 64 differential lock operating wire 65 differential lock interlocking wire 70 steering post 72 fixing portion 74 rotating portion 80 Panel 90 Gear portion 92 Lower box 94 Upper box 96 Lower bevel gear 98 Intermediate bevel gear 100 Upper bevel gears 102, 104, 106 Center shaft 110 Knob body 112 Restriction receiving member 114 Restriction member 116 Restriction member 118 Gear restriction member 140 Interlocking rod 140a Long hole 141 Rotating support shaft 142 Bracket 142h Horizontal hole 143 Inserting member 144 L-shaped bracket 145 Pressing member 146 Cam 147 Brake member 148 Spring 149 Elastic body 152 Out Shaft 153 Driving pulley 154 Belt 155 Driven pulley 156 Input shaft 157 Tension arm 158 Tension roller 159 Rotating shaft 174 Main clutch pedal 174a Pedal column 184 Core rod 188 Cylindrical member 190 Oscillating member 192 Oscillating pin 194 Spring 200 Wire 202, 204 206 Roller 210 Rod 212 Lever 214 Engagement member

Claims (3)

  A riding rice transplanter with a planting part connected to the rear of the traveling part so that it can be raised and lowered, a steering post provided on the body frame at the front end of the traveling part, and a steering wheel provided on the upper part of the steering post. The engine frame was made compact by installing an engine between the point of the vertical line dropped from the rearmost end of the steering wheel of the steering wheel to the fuselage frame and the point on the fuselage frame of the steering post. Rice transplanter   The riding rice transplanter according to claim 1, wherein an upper portion of the steering post is rotatable between a seat and the vicinity of a front end portion of the traveling portion, so that the steering post has a tiltable structure.   3. The riding rice transplanter according to claim 2, wherein the upper part of the steering post is provided with a bevel gear, and the upper part is rotated to transmit the rotational force of the steering wheel.

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