JPH0661017U - Mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To enable safe operation of the auxiliary shift lever. [Structure] In a mobile agricultural machine equipped with a main gearshift lever for performing switching operations such as road traveling, work traveling, and reverse travel, and a sub gearshift lever for performing gear shifting operation for work traveling, a continuously variable transmission mechanism has an auxiliary transmission mechanism. The gear shift lever is interlocked and linked through the interlocking mechanism, and the insert body is linked to the sub gear shift lever through the lever support shaft, and the sub gear shift lever is rotated to the low speed operation position side. While a biasing means for biasing is provided, a fixed side pressing body is elastically biased by an elastic means in the direction of surface contact with the fixed side pressing body in the vicinity of the insertion body, and a clutch pedal clutch disengagement operation is performed. The movable side clamping body, which is interlocked and moves away from the fixed side clamping body, is arranged so as to face each other, and the stepless speed change operation from the low speed operation position to the high speed operation position of the auxiliary shift lever and the fixed side and movable side of the insert body are performed. From the non-insertion position between the side clamps to the entire surface The insertion operation up to the insertion position is linked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mobile agricultural machine.

[0002]

[Prior art]

 Conventionally, as a form of a mobile agricultural machine, for example, a riding rice transplanter, a main gear shift lever for performing switching operations such as road traveling, work traveling, and reverse traveling, and a sub gear shift lever for performing gear shifting operation for work traveling. Some are equipped with.

The auxiliary transmission lever is linked to a stepped transmission mechanism through an interlocking mechanism, and a detent plate is linked to the auxiliary transmission lever via a lever support shaft, and the auxiliary transmission lever is An urging means for urging the auxiliary shift lever to rotate toward the low speed operation position is provided, while a shift restricting arm is provided near the detent plate so as to be able to move back and forth toward the detent plate side. The pressing bearing attached to the middle part of the detent plate is urged by the elastic means so as to engage with the gear speed step recess formed on the tip edge of the detent plate, and the shift restricting arm is interlocked with the disconnection operation of the clutch pedal to remove the detent plate from It is designed to be separated.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned passenger rice transplanter, the sub-gear lever is linked to the stepped speed change mechanism so that the stepped speed change operation can be performed.However, in the restriction structure using the detent plate and the shift restricting arm. However, there is a problem that even if the auxiliary shift lever is linked to the continuously variable transmission mechanism, it is impossible to perform continuously variable operation.

[0005]

[Means for Solving the Problems]

 Therefore, in the present invention, in a mobile agricultural machine equipped with a main gearshift lever for performing switching operations such as road traveling, work traveling, and reverse traveling, and an auxiliary gearshift lever for performing gear shifting operation of work traveling, The auxiliary transmission lever is linked to the transmission mechanism via the interlocking mechanism, and the insert body is linked to the auxiliary transmission lever via the lever support shaft, and the auxiliary transmission lever is operated at a low speed. On the other hand, an urging means for rotationally urging to the position side is provided.On the other hand, in the vicinity of the insert body, the fixed side pressure body and the elastic means are elastically urged in the direction of surface contact with the fixed side pressure body. By placing the movable side pressure body, which moves apart from the fixed side pressure body in conjunction with the clutch disengagement operation of the clutch pedal, facing each other, the stepless speed change operation from the low speed operation position to the high speed operation position of the auxiliary speed change lever, Between the fixed side and movable side pressure body of the insert There is provided St. mobile agricultural machinery, characterized in that the insertion position was interlocking the insertion operation up entire insertion position.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 shows a riding rice transplanter as a mobile agricultural machine according to the present invention, 1 is a traveling vehicle on which an operator rides, and a rear end of a vehicle body frame 3 on which an engine 2 is mounted. In front of the mission case 4, the front wheel 6 for paddy field traveling is supported in front of the mission case 4 through the axle case 5, and the transmission cases 7 are connected to both sides of the rear part of the mission case 4. A rear wheel 8 for paddy field traveling is supported at the rear end of the transmission case 7.

Then, the spare seedling mounts 10 are attached to both sides of the bonnet 9 that covers the engine 2 and the like, and the mission case 4 and the like are covered by the vehicle body cover 12 that forms the step 11, so that the upper portion of the vehicle body cover 12 is covered. A driver's seat 13 is attached, and a steering handle 14 is provided in front of the driver's part 13 at the rear of the hood 9 described above.

Further, in FIG. 1 and FIG. 2, reference numeral 15 is a planting part including a seedling table 16 for six-row planting and a plurality of planting claws 17, such as a front and a rear of a low synthetic resin. The tilting seedling stand 16 is supported on the planting case 20 via the lower rail 18 and the guide rail 19 so as to be slidable left and right, and at the same time, the rotary case 21 is rotated in one direction at a constant speed on the planting case 20. The pair of claw cases 22 and 22, which are supporting arms, are arranged symmetrically around the rotation axis of the case 21, and the claw cases 17 and 17 are attached to the tips of the claw cases 22. .

A support frame 24 is provided on the front side of the planting case 20 via a low rig fulcrum shaft 23, and a top link 25 and a lower link 26 are provided on the rear side of the traveling vehicle 1 via a sub three-point link mechanism 27. A supporting frame 24 is connected, and an elevating cylinder 28 for elevating and lowering the planting portion 15 is connected to the lower link 26 via the link mechanism 27, and the front and rear wheels 6, 8 are driven to move and simultaneously move to the left and right. One seedling worth of seedlings is taken out from the seedling placing table 16 which is reciprocally slid to, by the planting claws 17, and the seedling planting operation is continuously performed.

Further, in FIGS. 1 and 2, 29 is a main shift lever, 30 is a planting up / down and work traveling auxiliary shift lever, 31 is a planting sensitivity adjusting lever, 32 is a main clutch pedal, and 33 and 33 are left and right shakes. A brake pedal, 34 is a center float for leveling two rows, 35 is a side float for leveling two rows, 36 is a side fertilizer applicator, and 37 is a chemical sprayer.

As shown in FIGS. 3 to 5, a gear case 39 through which the steering wheel 38 of the steering handle 14 is inserted is provided on the rear side of the engine 2, and an output / input pulley 40 is provided between the gear case 39 and the engine 2. , 41 and a belt 42, a continuously variable transmission mechanism 43 is provided, and an output shaft 44 of the engine 2 is connected to an input shaft 45 of a gear case 39 via the continuously variable transmission mechanism 43. The mission case 4 is connected through the output shaft 46, the cases 5 and 7 are connected to the mission case 4 through the front and rear driving wheels 47 and 48, and the mission case 4 is connected through the planted drive shaft 49. The planting case 20 is connected to the input pulley 41, the input shaft 45, and the output shaft 46 via the main clutch 50, which is intermittently operated by the main clutch pedal 32, and the reduction gear 51. 43 and gear case 39 The output of the down 2 while transmitted to decelerate the transmission case 4, is configured to transmit multi-speed output by the main shift lever 29 of the transmission case 4 to the front and rear wheels 6, 8 and planting section 15.

Further, the continuously variable transmission mechanism 43 includes a tension roller 52, input / output cams 54, 55 connected by a rod 53, and input / output rollers 56, 57 for contacting the respective cams 54, 55. The mounting plate 58 for mounting the output roller 56 is fixed to the side surface of the engine 2, and the mounting plate 59 for mounting the input roller 57 is fixed to the support frame 60 of the vehicle body frame 3 so that the gear shifting as an actuator is performed. The input cam 55 is connected to the screw shaft 62 of the motor 61, and the output / input cams 54, 55 are rotated via the rod 53 by the forward / reverse control of the motor 61 mounted on the vehicle body frame 3 to rotate the output / input pulleys 40, 41. By changing the width of the belt 42 to change the winding diameter of the belt 42, the gear ratios of the pulleys 40, 41 and the belt 42 can be continuously changed.

Further, as shown in FIGS. 6 to 8, the main clutch switch 63 which is turned on by the disengagement operation of the main clutch 50 and the operation panel at the rear part of the bonnet 9 are attached to increase the traveling speed to a predetermined speed. Speed increase switch 64, a road drive switch 65 for detecting the road changeover of the main speed change lever 29, a speed change potentiometer 66 for detecting the speed change position of the auxiliary speed change lever 30, and an input / output cam 54 by the speed change motor 61. A feedback potentiometer 67, which is a feedback sensor for detecting the amount of displacement of 55, 55, and a regulator for connecting the generator of the engine 2 to a battery, and a travel speed change control circuit 69 composed of a micro computer are provided. The switches 63, 64, 65, the potentiometers 66, 67, and the regulator 68 are connected to the control circuit 69.

Further, the speed change motor 61 is connected to the control circuit 69 via the speed increasing / decelerating circuits 70 and 71, and the manual switch 72 is connected to each of the circuits 70 and 71 to operate the auxiliary speed change lever 30. Alternatively, by operating the manual switch 72, the transmission motor 61 is rotated in the forward and reverse directions to control the transmission of the stepless transmission mechanism 43.The output range of the transmission potentiometer 66, which is the transmission operation range of the auxiliary transmission lever 30, is detected by a feedback sensor. The output range of the feedback potentiometer 67, which is the operating range, is set to be larger than the output range of the potentiometers 66 and 67 even if the output of the potentiometers 66 and 67 deviates due to component characteristics or mounting errors. The variable speed motor 61 is always operated up to the maximum or minimum position.

Then, as shown in FIG. 7, switching between road traveling (high speed forward movement), work traveling with planting (low speed forward movement), seedling splicing (temporary stop), and reverse movement is performed by operating the main shift lever 29. At the same time, as shown in FIG. 8, ascent and descent of the planting part 15 (planting clutch disengaged), movement of the left and right markers to their operating positions, and planting clutch engagement operation, low-speed to high-speed (forward) stepless auxiliary shifting, The operation is performed by operating the auxiliary transmission lever 30.

Moreover, when the main clutch 50 is turned off at a headland or the like and the main clutch switch 63, which is provided in series with the starter motor and acts as a safety switch, is turned on, and the speed increasing switch 64 is turned off. The speed change motor 61 is automatically decelerated to a predetermined speed and maintained at a predetermined speed.On the other hand, when the speed increasing switch 64 is on, the speed change motor 61 is moved to a position higher than the predetermined low speed in the off state by a certain width. The deceleration operation of 61 is performed to maintain the speed at a constant higher speed than the predetermined speed.

When the main clutch 50 is on and the main clutch switch 63 is off, when the road drive switch 65 or the speed increasing switch 64 is turned on, the speed change motor 61 is automatically increased to a predetermined speed. , Is maintained at a predetermined speed.

Further, when the switches 63, 64, 65 are off, the inputs of the potentiometers 66, 67 for shifting and feedback are compared, and shifting is performed by changing the variable speed position of the auxiliary shift lever 30 in the planting work state. It operates the motor 61 and controls the continuously variable transmission mechanism 43 to continuously change the planted traveling speed.When the auxiliary gear shift lever 30 is operated at a high speed to increase the speed, the transmission motor 61 is pulsed to drive the transmission motor 61. On the other hand, when decelerating by operating the lever 30 on the low speed side, the shift motor 61 is operated by continuous driving to perform decelerating operation.

When the speed-changing motor 61 is performing the speed-up operation, the motor 61 is stopped while the speed-up or speed-down control signal is being output, and the value of the feedback potentiometer 67 is substantially constant. The value of the potentiometer 67 is stored as the maximum or minimum limit position of the motor 61, and it is used as the limit value of the control of the motor 61 until it is reset by turning off the power, and only the reverse operation is performed. To activate the motor 61.

When the speed increasing / decreasing operation is being performed by the transmission motor 61, the voltage change of the regulator 68 which becomes 0 V when the engine 2 is operating and becomes 12 V when the engine 2 is stopped is used to regulate the regulator 68. By stopping the engine 2 detected by the 12-volt constant voltage of 68, the traveling speed change control of the speed change motor 61 is stopped, and all the auxiliary speed change operations such as the operation of the manual switch 72 are disabled. When 63, 64, 65 are off and the shift potentiometer 66 is operated by the auxiliary shift lever 30 while the engine 2 is operating, the continuously variable transmission mechanism 43 is controlled by the shift motor 61, and the planted traveling speed is Is to be changed.

In the above-described configuration, in this embodiment, as shown in FIGS. 9 and 10, the lever support shaft 75 is attached to the middle portion on the right side of the vehicle body frame 3 while extending in the left-right width direction. The base end of the sub-transmission lever 30 that has been erected upward on the support shaft 75 is pivotally supported via the boss 76, and the base end of the insert body 77 that extends downward and frontward is also supported on the lever support shaft 75. It is pivotally supported integrally with the sub-transmission lever 30 via the boss 76 described above, and an arm 78 is attached to the boss 76 so that a urging means is provided between the tip of the arm 78 and the body frame 3. The damper 79 urges the sub-transmission lever 30 to rotate toward the low speed operation position P1 via the damper 79. 90 and 91 are stays, respectively.

A pair of front and rear pressure plate support shafts 80, 80 are attached to the base plate 92 attached to the vehicle body frame 3 located immediately behind the insert body 77 so as to extend in the left-right width direction. The fixed side pressure body 81 is fixed to the shafts 80 and 80, while the movable side pressure body 82 is slidably attached to both the pressure plate support shafts 80 and 80 in the axial direction. The inner clamping surface 82a of 82 is freely contactable with and separated from the inner clamping surface 81a of the fixed-side clamping body 81, and the movable-side clamping body 82 serves as elastic means in the direction of surface contact with the stationary-side clamping body 81. It is biased by a spring 83.

Moreover, in the vicinity of the movable side pressing body 82, a midway portion of the substantially L-shaped lever 84 is pivotally supported by a support shaft 85 extending in the vertical direction, and one end of the lever 84 is provided with the movable side clamping body. The pressure body 82 is interlockingly connected via the interlocking body 86, while the main clutch pedal 32 is interlockingly connected to the other end of the lever 84 via the feedback wire 87.

In this way, when the auxiliary transmission lever 30 is rotationally operated from the low speed operation position P1 to the high speed operation position P2, the insertion body 77 is moved rearward against the rotational biasing force of the damper 79 and fixed. From the non-inserted position between the side / movable side clamps 81, 82 to the full insertion position, it is inserted against the pressing force of the spring 83, and the auxiliary shift lever 30 is rotated toward the high-speed operation position P2 side. , The friction resistance of the insert 77, which is clamped by the inner clamping surface 81a of the fixed-side clamping body 81 and the inner clamping surface 82a of the movable-side clamping body 82, increases. It is possible to experience that the lever 30 is continuously variable-shifted to the high speed side, and it is possible to ensure good safety during the shift operation.

When the main clutch pedal 32 is depressed to perform the clutch disengagement operation, the main clutch 50 is disengaged, and the movable side pressing member 82 is fed through the feedback wire 87 → the lever 84 → the interlocking member 86. Is slid against the pressing force of the spring 83 in the direction away from the fixed side pressing body 81, the clamping force of the insert body 77 is released, and the auxiliary shift lever 30 rotates the damper 79. The urging force restores the low speed operation position P1, and the stepless speed change operation of the auxiliary speed change lever 30 can be started from the low speed operation position P1 to ensure good safety during a speed change operation. I am able to do it.

11 and 12 show the structure of the operating lever 95. The operating lever 95 includes a lower lever portion 95a located below the step 96 and an upper end of the lower lever portion 95a. The upper lever portion 95b is detachably attached to the upper lever portion 95b, and the upper end portion thereof protrudes above the step 96 through the insertion hole 97, and the knob portion 95n is detachably attached to the upper end of the upper lever portion 95b.

Then, a fitting protrusion 95c is formed on the upper end of the lower lever portion 95a, and a fitting recess 95d is formed on the lower end of the upper lever portion 95b. Further, both lever portions 95a, 95b are respectively formed. The connecting projections 95e, 95f are provided in a protruding manner, and the connecting pin 98 is inserted into the connecting holes 95g, 95h formed at the tips of the connecting projections 95e, 95f so that they can be inserted and removed freely. It is possible to connect 95e and 95f.

In this way, when removing step 96, when the knob portion 95n is removed from the upper lever portion 95b and the knob portion 95n is attached to the upper lever portion 95b again, where is the position of the lower lever portion 95a? Even if there is, I am trying to install it.

Also, when the planting marker button is attached on the knob 95n, the harness connected to the button can be passed through the lever.

[0030]

[Effect of device]

 According to the present invention, the following effects can be obtained.

That is, in the present invention, when the auxiliary shift lever is rotated from the low speed operation position to the high speed operation position, the insert body is interlocked with the rotation operation so that the fixed side compression body and the movable side compression body are linked. Is inserted against the elastic biasing force of the elastic means and moves from the non-pressing position to the full-pressing position, the operator who operates the auxiliary speed change lever continuously changes By increasing the frictional resistance received from between, it is possible to experience the fact that a continuously variable shift operation is performed at the high speed side, and good safety can be ensured during the shift operation.

When the clutch pedal is operated to disengage the clutch, the movable side pressure body is moved away from the fixed side pressure body in cooperation with the clutch disengagement operation. The sub-gear lever that is urged to rotate is reliably restored to the low-speed operation position, and the stepless speed-change operation can be started from the low-speed operation position. Can be secured.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view of a traveling drive unit.

FIG. 4 is a side view of a continuously variable transmission mechanism.

FIG. 5 is a plan view of the same.

FIG. 6 is a travel shift control circuit diagram.

FIG. 7 is a plan view of a main shift lever portion.

FIG. 8 is a plan view of an auxiliary shift lever portion.

FIG. 9 is a side view illustrating a sub-transmission lever portion.

FIG. 10 is an explanatory plan view of an auxiliary shift lever portion.

FIG. 11 is a side view of the operating lever.

FIG. 12 is an explanatory view of a separated state of the operation lever.

[Explanation of symbols]

 A Passenger rice transplanter 29 Main shift lever 30 Sub shift lever 43 Continuously variable transmission

Claims (1)

[Scope of utility model registration request] 1. A mobile agricultural machine comprising a main speed change lever for performing switching operations such as road travel, work travel, and reverse travel, and an auxiliary speed change lever for performing speed change operation for work travel. The sub-shift lever is connected to the sub-shift lever via the interlocking mechanism, and the insert is linked to the sub-shift lever via the lever support shaft to turn the sub-shift lever to the low speed operation position side. While providing urging means for urging,
In the vicinity of the insertion body, the fixed side pressure body and the fixed side pressure body are elastically biased in the direction of the surface contact with the fixed side pressure body by the elastic means. By placing the movable side clamping body that is separated from each other so as to face each other, stepless speed change operation from the low speed operation position to the high speed operation position of the auxiliary transmission lever, and non-insertion of the insert body between the fixed side and movable side clamp body A mobile agricultural machine characterized by interlocking with the insertion operation from the position to the full insertion position.