JP3594564B2 - Operation device of paddy working machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an operation device for a paddy field working machine such as a rice transplanter, and more specifically, a belt-tension type main clutch for intermittently transmitting power from an engine mounted on the front to a transmission at one of the left and right sides of the front of the machine. And a linkage mechanism that arranges main clutches and brake pedals on the left and right sides of the foot portion of the driving section, and interlocks the main clutches and brake pedals so that the main clutches are disengaged by depressing operation of the main clutches and brake pedals. The present invention relates to an operating device for a paddy field working machine provided with the above.
[0002]
[Prior art]
Conventionally, the link mechanism is provided with an intermediate interlocking shaft having a left-right orientation in which a tension arm of the main clutch is connected to one end on the left and right sides and an operated arm is connected to the other end on the left and right sides. An operation rod for interlocking the brake pedal and the operated arm is provided, and the tension arm is turned off against the urging force by the depression operation of the main clutch / brake pedal.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional technique, the vibration of the tension arm is transmitted to the main clutch / brake pedal via the intermediate transmission shaft / operating rod, so that the main clutch / brake pedal may vibrate and generate noise. .
[0004]
An object of the present invention is to suppress vibration of a main clutch / brake pedal caused by vibration of a tension arm.
[0005]
[Means for Solving the Problems]
The features, functions and effects of the operation device for a paddy field working machine according to the present invention according to claim 1 are as follows.
[0006]
〔Characteristic〕
A belt-tensioned main clutch that interrupts transmission from the engine mounted on the front to the transmission is located on one side of the front of the fuselage, and the main clutch and brake are located on the left and right sides of the foot of the driver. In a paddy working machine provided with a linkage mechanism for arranging a pedal and interlocking the main clutch and brake pedal so that the main clutch is disengaged by the depressing operation of the main clutch and brake pedal, the left and right ends The main clutch / brake pedal and the operated arm are interlocked with each other by providing an intermediate interlocking shaft having a left-right posture in which a tension arm of the main clutch is continuously provided on one side and an operated arm is continuously provided on the other left and right sides. An operating rod is provided, and a vibration isolator is interposed between the operating rod and the operated arm.
[0007]
[Action]
Since the vibration isolator is interposed between the operating rod and the operated arm, the vibration of the operated arm, that is, the vibration of the tension arm, is transmitted to the main clutch / brake pedal via the operating rod. Can be suppressed.
[0008]
〔effect〕
Therefore, by appropriately selecting the vibration isolator, the operating force of the main clutch / brake pedal can be transmitted to the tension arm to reliably disconnect and operate the main clutch, but the main clutch due to the vibration of the tension arm can be operated.・ The noise generation can be suppressed by suppressing the vibration of the brake pedal.
[0009]
The features, operations, and effects of the operation device for a paddy field working machine according to the second aspect of the present invention are as follows.
[0010]
〔Characteristic〕
The operating device for a paddy field working machine according to the present invention according to claim 1, wherein the connecting shaft for pivotally connecting the operated arm and the operating rod is connected to the vibration isolator and the vibration isolator is connected to the connecting shaft. An engagement portion for positioning the vibration isolator in the axial direction is formed on the operation rod, and an engagement portion for engaging the vibration isolator with the operation rod and positioning the vibration isolator in the axial direction is formed on the operation rod. On the point.
[0011]
[Action]
By forming an engaging portion on the connecting shaft and the operating rod and elastically engaging the vibration isolator with the engaging portion, the vibration isolator is positioned with respect to the operated arm and the operating rod. For this reason, it is not necessary to use pins, retaining rings, bolts, or other attachments when installing the vibration isolator.
[0012]
〔effect〕
Therefore, the cost required for mounting the vibration isolator can be reduced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIGS. 1 and 2, a rice transplanter, which is an example of a paddy working machine, raises and lowers a seedling planting device 3, which is an example of a paddy working device, at the rear of the self-propelled machine 1 via a four-link mechanism 2. A lift cylinder 4 is provided, which is freely connected, and uses a hydraulic cylinder that raises the seedling planting device 3 with supply of pressurized oil and lowers the seedling planting device 3 with its own weight as oil is drained.
[0014]
The self-propelled machine 1 has a driving unit 5 mounted on a front part, a driver seat 6 mounted on a rear part, and a pair of left and right driving front wheels 7 for steering and a pair of right and left driving rear wheels 8. ing. In front of the driver's seat 6, a steering handle 9 for steering the drive front wheel 7 is arranged.
[0015]
As shown in FIGS. 3 to 5, the driving unit 5 includes an engine 10 having an output shaft 10 a protruding leftward, and a forward / reverse switchable static motor having an input shaft 11 a protruding leftward. A hydraulic stepless transmission 11, a belt tension type main clutch C which is located on the left side and can be switched between a clutch engaged state for transmitting power from the output shaft 10a to the input shaft 11a and a clutch disengaged state for interrupting transmission, A transmission case 12 is provided for transmitting an output from the continuously variable transmission 11 to a traveling unit (the front driving wheel 7 and the rear driving wheel 8) and the seedling planting device 3. The transmission case 12 is provided with a brake B having a transmission gear to a traveling unit as a brake disk.
[0016]
As shown in FIG. 6, the main clutch C has an output pulley 13 mounted on the output shaft 10a of the engine 10 in an integrally rotating state and an input pulley 14 mounted on the input shaft 11a of the continuously variable transmission 11 in an integrally rotating state. The transmission belt 15 is wrapped around it, and the tension is swingably switchable between a clutch-engaged position where the transmission belt 15 is pressed to press the transmission belt 15 and a clutch disengagement position where the pressing is released and the transmission belt 15 is set to the non-transmission state. An arm 16 is provided, and a helical spring 17 for oscillatingly biasing the tension arm 16 to a clutch engaged position is provided.
[0017]
As shown in FIG. 2, a main clutch for disengaging the main clutch C and braking the brake B by being depressed against the bias is provided on the right side of the foot portion of the driver seat 6 as shown in FIG. 2. A brake pedal 18 is disposed, and a main transmission lever 19 for operating the continuously variable transmission 11 is disposed on the side of the steering handle 9 as shown in FIGS. .
[0018]
As shown in FIGS. 4 to 6, a linkage mechanism A for linking the tension arm 16 to the main clutch / brake pedal 18 so that the main clutch C is disengaged by the depression operation of the main clutch / brake pedal 18 A left-right facing intermediate interlocking shaft 20 having the tension arm 16 connected to the side thereof and the first operated arm 21 connected to the right end side is supported by the engine mounting frame 30 so as to be rotatable around its axis. An operation arm 22 that swings integrally with the main clutch / brake pedal 18 is provided, and the first operated arm 21 is made of a rubber-based vibration isolator by the swing of the operation arm 22 caused by the depression operation of the main clutch / brake pedal 18. A first operating rod 24 is provided to press and swing to the clutch disengagement side via 23.
Pressing the first operated arm 21 with the first operating rod 24 via the vibration isolator 23 means that the vibration isolator 23 is interposed between the first operating rod 24 and the first operated arm 21. The purpose of the mounting is to prevent the vibration of the tension arm 16 in the state where the main clutch C is engaged and operating from being transmitted to the main clutch / brake pedal 18 to prevent the main clutch / brake pedal 18 from vibrating. The vibration isolator 23 has a bifurcated portion 24a of the first operating rod 24 so that a boss portion for pivotally connecting the first operated arm 21 via the connecting shaft S is formed at the distal end of the first operating rod 24. Is held in. As shown in FIG. 7, the main clutch / brake pedal 18 is depressed between the vibration isolator pressing surface at the bottom of the forked bifurcated portion 24a and the vibration isolator 23 in the initial play range. A gap h is formed to move only the tip forked portion 24a without pressing the vibration isolator 23 during the operation.
[0019]
As shown in FIGS. 7 to 9, the means for positioning the vibration isolator 23 on the connection shaft S engages with the concave portion 23 a formed in a circumferential groove shape in the shaft hole of the vibration isolator 23. A plurality of protrusions a in the circumferential direction, which are engaging portions for positioning the body 23 in the axial direction with respect to the connection shaft S, are formed on the connection shaft S, and the vibration isolator 23 is attached to the tip forked portion 24a. On the other hand, the means for positioning in the axial direction is a means for forming a slit-shaped engaging portion b that engages with a pair of protrusions 23b formed on the vibration isolator 23 at the tip forked portion 24a. The distal end of the distal forked portion 24a is formed so that the distal end forked portion 24a of the vibration isolator 23 can be easily attached to the distal forked portion 24a. It is bent so that the gap gradually increases toward the side.
[0020]
The tension arm 16, the intermediate interlocking shaft 20, the first operated arm 21, and the connecting shaft S are integrally formed by bending a single bar (shaft).
[0021]
Means for linking the second operated arm 27 of the brake B to the main clutch / brake pedal 18 so that the brake B is operated by depressing the main clutch / brake pedal 18 are as shown in FIGS. The second operated arm 27 is pushed by the operation arm 22 via the coil spring 28 and pulled by the swing 29a caused by the depression of the main clutch / brake pedal 18 of the operation arm 22 by the operation arm 22. A second operation rod 29 that swings toward the braking side is provided.
[0022]
As shown in FIGS. 1 to 5, 8 and 9, right and left columns 31 and upper ends thereof are provided at the front of the self-propelled machine 1, that is, at the front of the engine mounting frame 30. An operating tool 33, which is constituted by a gripping operation rod 32 that connects each other, and that can be freely oscillated around a left-right axis p between an operating position protruding forward and a standing storage position, is provided. It is mounted in a state where the left and right centers match the left and right centers of self-propelled machine 1.
[0023]
The operation tool 33 is mainly used for suppressing the front part of the self-propelled machine 1 in order to prevent the front part of the self-propelled machine 1 from rising when crossing a ridge or when loading / unloading a truck from / to a carrier via a footboard. The left and right columns 31 and the gripping operation rod 32 are integrally formed by bending a single pipe material into a substantially U-shape. The strut portion 31 is bent so as to widen the facing distance of the middle portion to prevent interference with the headlight H, and the length of the gripping operation rod 32 is set to be longer than the facing distance of the base end of the strut portion 31. It is configured.
[0024]
[Another embodiment]
In the above-described embodiment, as the engaging portion a for positioning the vibration isolator 23 in the axial direction with respect to the connection shaft S, the protrusion that engages with the concave portion 23a formed in the vibration isolator 23 is shown. As shown in FIGS. 11 and 12, the joint a is engaged with a projection 23c formed in the shaft hole of the vibration isolator 23 to position the vibration isolator 23 in the axial direction with respect to the connection shaft S. A circumferential groove may be used.
[Brief description of the drawings]
FIG. 1 is a side view of a rice transplanter. FIG. 2 is a plan view of a rice transplanter. FIG. 3 is a side view of a driving unit. FIG. 4 is a side view of a linkage mechanism in a main clutch disengagement / braking release state. FIG. 6 is a side view of the linking mechanism in a clutch engaged / braking state. FIG. 6 is a plan view of the linking mechanism. FIG. 7 is a longitudinal side view of an interlocking link between the linking shaft and the operating rod. FIG. 9 is an exploded perspective view of an interlocking connection part between a connection shaft and an operation rod. FIG. 10 is a front view of an operation part. FIG. 11 is a front view of a connection shaft and an operation rod showing another embodiment. FIG. 12 is an exploded perspective view of an interlocking connection portion between a connection shaft and an operation rod according to another embodiment.
10 Engine 11 Transmission C Main Clutch 18 Main Clutch / Brake Pedal A Linkage Mechanism 16 Tension Arm 21 Operated Arm 20 Intermediate Interlocking Shaft 24 Operating Rod 23 Vibration Isolator S Connection Shaft a Engaging Part b Engaging Part

Claims (2)

A belt-tensioned main clutch that interrupts transmission from the engine mounted on the front to the transmission is located at one side of the front of the fuselage, and the main clutch and brake are located at the left and right sides of the foot of the driver. In a paddy working machine in which a pedal is arranged and a linkage mechanism is provided for interlocking the main clutch and the brake pedal so that the main clutch is disengaged by the depressing operation of the main clutch / brake pedal, the linkage mechanism comprises: The main clutch / brake pedal and the operated arm are interlocked with each other, provided with an intermediate interlocking shaft having a left-right orientation in which a tension arm of the main clutch is continuously provided on one side and an operated arm is continuously provided on the other left and right sides. An operation device for a paddy working machine, comprising an operation rod, and a vibration isolator interposed between the operation rod and the operated arm. An engagement portion for engaging the vibration isolator and positioning the vibration isolator in the axial direction with respect to the coupling shaft is formed on a connection shaft pivotally connecting the operated arm and the operation rod; 2. The operating device for a paddy working machine according to claim 1, further comprising an engaging portion that engages with the vibration isolator and positions the vibration isolator with respect to the operation rod in the axial direction.

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