JP2004313039A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transplanter equipped with intrarow spacing speed change mechanisms for changing the gear of the relative action speed of a planting mechanism based on a vehicle speed in a plurality of stages, with which inconvenience of unnecessarily increasing the action speed in soil of the planting mechanism in a planting travel is eliminated and vibrations caused by fluctuation of the drive load of the planting mechanism is reduced under setting of standard intrarow spacing (small intrarow spacing side) having a high number of revolutions of the planting mechanism or above. <P>SOLUTION: The transplanter is equipped with the intrarow spacing speed change mechanisms 30 and 35 and a rotary speed change mechanism 36 for rotating the planting mechanism 15 at an equal speed or irregular speed in a transmission route for transmitting power from an engine 2. The rotary speed change mechanism 36 is changed to equal speed rotation with speed change operation of the intrarow spacing speed change mechanisms 30 and 35 to the small intrarow spacing side or to irregular speed rotation with the speed change operation of the intrarow spacing speed change mechanisms to a wide intrarow spacing side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transplanter such as a rice transplanter having a planting mechanism for scraping a seedling from a seedling mounting table and planting the seedling in a field.
[0002]
[Prior art]
In recent years, with this type of transplanter, attempts have been made to increase the number of planted plants in consideration of the growth conditions (sunshine, aeration, etc.) of the planted seedlings. If the operating speed of the planting mechanism (operating speed relative to the vehicle speed) is reduced in order to widen the planting stock, the amount of forward movement of the planting claw due to the progress of the aircraft will be soiled. There is a risk that planted seedlings may be dragged.
[0003]
Therefore, by changing the planting operation speed in one cycle unequally without changing the planting cycle of the planting mechanism, the planting claw in the soil during the planting run is increased in speed to increase the seedling operation speed. It has been proposed to prevent the dragging of an object (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-224213 A (Pages 5-6, FIG. 4)
[0005]
[Problems to be solved by the invention]
However, in the technique disclosed in Patent Document 1, since the planting mechanism is always operated at a non-uniform speed, the setting of the planting mechanism during the planting travel of the standard plant with a high rotation speed of the planting mechanism or lower is not performed. In this case, the underground operation speed is unnecessarily increased, and the driving load thereof fluctuates to increase the vibration.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to solve these problems in view of the above-described circumstances, and in a transplanting machine including a planting mechanism for scraping a seedling from a seedling mounting table and transplanting the seedling to a field, In the transmission path for transmitting power from the engine to the planting mechanism, an inter-stock transmission mechanism and a rotation transmission mechanism that rotates the implantation mechanism at a constant speed or at an unequal speed are provided. It is characterized in that it is configured to switch to constant speed rotation in response to a shift operation to the side, and to switch to unequal speed in response to a shift operation to the wide stock side.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of a riding rice transplanter, which is mounted via an engine 2 mounted on a front part of the body, a transmission case 3 for inputting engine power, and a front axle case 4. And a pair of left and right rear wheels 7 mounted via a rear axle case 6. The engine power is input to the transmission case 3 via a belt-type or hydraulic-type continuously variable transmission mechanism 8. The transmission mechanism in the transmission case 3 changes the speed of the input engine power and transmits it to the front axle case 4, the rear axle case 6, and the planted PTO shaft 9.
[0008]
A planting work section 11 is connected to a rear portion of the traveling body 1 via a lifting link mechanism 10. The planting work section 11 includes a working section frame 12 connected to the lifting link mechanism 10 so as to be able to roll left and right, a seedling table 13 provided reciprocally right and left above the working section frame 12, An input case (not shown) attached to the left and right intermediate portions of the frame 12; and a plurality of input cases attached to the working unit frame 12 at predetermined intervals in the left and right direction and extending rearward from the working unit frame 12. And a planting mechanism 15 provided at the rear end of the planting transmission case 14, a float 16 provided below the planting transmission case 14 so as to be vertically swingable, and the like. I have.
[0009]
The input case receives planting power from the planting PTO shaft 9 of the transmission case 3 and transmits the planting power to each planting transmission case 14 via a planting transmission shaft (not shown). Further, the planting power transmitted to the planting transmission case 14 is transmitted to the planting mechanism 15 via a chain transmission mechanism (not shown) in the planting transmission case 14.
[0010]
The planting mechanism 15 includes a rotating case 17 that is rotated by the planting power, and a pair of planting claw support cases 18 provided at both ends thereof. The posture of the planting claw support case 18 is controlled by a gear train (not shown) provided in the rotating case 17 so that the planting claw 19 provided at the distal end portion draws a predetermined trajectory. In other words, when the rotating case 17 rotates, the planting claws 19 scrape the seedlings from the lower end of the seedling mounting table 13, reach the planting position in the soil while drawing a circular arc swelling forward, and then linearly move. It is configured to draw a half-moon-shaped stationary locus (tip motion locus when traveling is stopped) that rises. Thereby, planting is performed twice each time the rotating case 17 makes one rotation.
[0011]
The planting operation speed of the planting mechanism 15 is linked to the vehicle speed, and the planting stock of the planting mechanism 15 is adjusted by changing the planting operation speed relative to the vehicle speed.
Further, when the planting operation trajectory during the planting operation of the planting mechanism 15 is set so that the planting operation speed with respect to the vehicle speed is reduced so as to widen the planting stocks, the forward movement amount of the planting claw 19 accompanying the machine body advance is in the soil. It grows and the planted seedlings are dragged. Therefore, in the case of widening the planting stock, by changing the planting operation speed in one cycle at an irregular speed without changing the stationary trajectory of the planting mechanism 15, the soil operating speed of the planting claws 19 is changed. It is necessary to increase the speed to prevent the dragging of the seedlings. Hereinafter, the configuration for that will be described.
[0012]
The transmission case 3 transmits the power input to the input shaft 20 to a cylindrical shaft 21 rotatably supported by the input shaft 20, an intermediate transmission shaft 22 parallel to the cylindrical shaft 21, and the intermediate transmission shaft 22. To the planted PTO shaft 9 via the inter-stock transmission shaft 23, a cylindrical shaft 24 rotatably supported by the inter-stock transmission shaft 23, and a cylindrical shaft 25 rotatably supported by the cylindrical shaft 24. It is configured to transmit power.
[0013]
A main clutch mechanism 26 is formed between the input shaft 20 and the cylindrical shaft 21. The running power and the planting power are intermittently connected according to the on / off operation. A gear 27 for taking out running power and a gear 28 for taking out planting power are integrally provided on the cylindrical shaft 21 on the lower transmission side of the main clutch mechanism 26, and the transmission gear 28 always meshes. The planting power is transmitted to the intermediate transmission shaft 22 via the gear 29.
[0014]
A first inter-gear transmission mechanism 30 is configured between the intermediate transmission shaft 22 and the transmission upper end of the inter-gear transmission shaft 23. The first inter-stock transmission mechanism 30 includes two gears 31 and 32 integrally provided on the intermediate transmission shaft 22 and a transmission gear 33 that is spline-fitted to the inter-stock transmission shaft 23. The transmission gear 33 has three gear portions 33a, 33b, and 33c, and the three gear portions 33a, 33b, and 33c selectively mesh with the two gears 31 and 32, thereby performing a three-stage inter-stock shift. Making it possible.
[0015]
A torque limiter 34 is provided between the lower transmission end of the inter-stock transmission shaft 23 and the upper transmission end of the cylindrical shaft 24. Here, the planting power transmitted to the torque limiter 34 is a constant speed rotation. Thereby, the operation load of the torque limiter 34 becomes constant, and a stable limit operation becomes possible.
[0016]
A transmission gear 36 constituting a second inter-stock transmission mechanism 35 is spline-fitted to the lower transmission end of the cylindrical shaft 24. The speed change gear 36 is operated to shift between a position at which it meshes with a gear 37 rotatably supported by the intermediate transmission shaft 22 and a position at which its side meshing teeth 36a mesh with the meshing teeth 25a of the cylindrical shaft 25. I have. In a state where the meshing teeth 36a of the transmission gear 36 mesh with the meshing teeth 25a of the cylinder shaft 25, the rotation of the cylinder shaft 24 is transmitted to the cylinder shaft 25 without being shifted, and the transmission gear 36 meshes with the gear 37. Then, the planting power is shifted by the gear ratio. Thus, by combining the two-stage shift by the second inter-gear transmission mechanism 35 and the three-stage shift by the first inter-gear transmission mechanism 30, six-stage inter-stock adjustment can be performed.
[0017]
The gear 37 is integrally provided with an eccentric gear 39 constituting the unequal speed transmission mechanism 38. This eccentric gear 39 is always meshed with an eccentric gear 40 provided integrally with the cylinder shaft 25. That is, when the gears 36 and 37 of the second inter-gear transmission mechanism 35 mesh with each other, the power of the cylinder shaft 24 is transmitted to the cylinder shaft 25 via the unequal speed transmission mechanism 38. Thus, not only can the planting power be switched between constant speed and unequal speed, but also the above-described constant speed and unequal speed switching can be performed using the transmission gear 36 of the second inter-gear transmission mechanism 35 as a rotary transmission mechanism. It becomes possible.
[0018]
The cylindrical shaft 25 transmits the planting power from the lower end of the transmission to the planted PTO shaft 9 via the bevel gears B1 and B2. The bevel gear B2 on the planted PTO shaft 9 side is rotatably provided on the planted PTO shaft 9 and is connected to the planted PTO shaft 9 via a planting clutch mechanism 41. The planting clutch mechanism 41 is a meshing clutch in which the meshing position is limited to only one position. Even if the planting power is interrupted on the lower transmission side of the unequal speed transmission mechanism 38, the unequal speed transmission mechanism 38 increases. There is no shift in the speed position.
[0019]
Further, the transmission case 3 slidably supports a first shifter shaft 42 for shifting the first inter-gear transmission mechanism 30 and a second shifter shaft 43 for shifting the second inter-gear transmission mechanism 35. ing. A shifter fork 44 that engages with the transmission gear 33 is provided at an inner end of the first shifter shaft 42, while a first inter-gear shift lever 45 is connected to the outer end. The operation position of the first inter-stock shift lever 45 is defined by the first detent mechanism 46, and the above-described three-stage inter-stock shift is possible. Further, a shifter fork 47 that engages with the transmission gear 36 is provided at an inner end of the second shifter shaft 43, while a second inter-gear shift lever 48 is connected to the outer end. The operation position of the second inter-stock shift lever 48 is defined by the second detent mechanism 49, and enables the above-described two-stage inter-stock shift. As described above, in the second inter-stock transmission mechanism 35, the constant-speed / non-constant-speed rotation switching is performed together with the inter-stock transmission, so that the second inter-stock transmission lever 48 is moved at the same speed / unequal speed as the inter-stock transmission operation tool. It is also used as a high-speed rotation switching operation tool.
[0020]
As described above, the six-stage inter-stock ratio (Kl to K6) which can be adjusted by the combination of the first inter-gear speed change mechanism 30 and the second inter-gear speed change mechanism 35 is as follows: Kl <K2 <K3 <K4 <K5 <K6 These six levels of stocks (Kl to K6) appear when the first stock shift lever 45 and the second stock shift lever 48 are operated to the following positions.
Kl: First-gear shift lever (small), Second-gear shift lever (small)
K2: First inter-gear shift lever (medium), second inter-gear shift lever (small)
K3: First-gear shift lever (large), Second-gear shift lever (small)
K4: First-gear shift lever (small), Second-gear shift lever (large)
K5: First stock shift lever (medium), second stock shift lever (large)
K6: First-gear shift lever (large), Second-gear shift lever (large)
[0021]
That is, the shift from the small-cap stock side of K1 to K3 to the large-capacity side of K4 to K6 is performed by the shift operation of the second inter-stock shift lever 48 from the (small) to (large) inter-stock side. The applied power is also switched from the constant speed transmission path to the unequal speed transmission path, and the rotation of the planting mechanism 15 is switched from the constant speed rotation to the unequal speed rotation.
[0022]
The rice transplanter configured as described above includes a planting mechanism 15 that scrapes the seedlings from the seedling mounting table 13 and transplants them to the enclosure, and a stock-shifting mechanism that shifts the operating speed of the planting mechanism 15 relative to the vehicle speed in multiple stages. A mechanism 30 and 35 and a non-constant speed transmission mechanism 38 for changing the planting operation speed in one cycle of the planting mechanism 15 to non-constant speed, and a non-constant speed transmission via the non-constant speed transmission mechanism 38 Path (cylinder shaft 24 → transmission gear 36 → gear 37 → non-constant speed transmission mechanism 38 → cylinder shaft 25) and a constant speed transmission path that does not pass through the unequal speed transmission mechanism 38 (cylinder shaft 24 → transmission gear 36 → cylinder shaft) 25), and the switching between the unequal-speed transmission path and the constant-speed transmission path can be performed by the transmission gear 36 of the second inter-stock transmission mechanism 35. That is, by using the transmission gear 36 of the second inter-gear transmission mechanism 35 as a rotary transmission mechanism, not only the number of parts can be reduced and cost can be reduced, but also the second inter-gear transmission mechanism 35 and the unequal speed conversion mechanism 38 Can be configured compactly.
[0023]
In addition, when the second inter-gear transmission mechanism 35 is operated to shift between the small stocks (K1 to K3) where the rotation speed of the planting mechanism 15 is high and the driving load is large, the planting power is automatically reduced in load fluctuation. The planting mechanism 15 is switched to the high-speed transmission path and rotates at a constant speed, whereby the operating speed in the soil during planting traveling of the planting mechanism 15 is not unnecessarily increased, and furthermore, the vibration due to load fluctuations Can also be reduced.
On the other hand, when the second inter-gear speed change mechanism 35 is operated to shift between the wide stocks (K4 to K6) where the rotation speed of the planting mechanism 15 is low and the driving load is small, the planting power is automatically transmitted at a non-uniform speed. By switching to the path, the planting mechanism 15 rotates at a non-uniform speed, whereby the operating speed during one planting cycle can be changed at a non-uniform speed without changing the stationary locus of the planting mechanism 15. If one cycle of planting is configured so that the operating speed of the planting claws in the soil during planting traveling is high, it is possible to prevent the seedlings from being dragged between the wide plants.
Further, since the switching between the constant speed and the unequal speed is automatically performed by the shift operation of the second inter-gear transmission mechanism 35, not only the speed change operation can be simplified, but also the switching between the constant speed and the unequal speed that is not suitable between the stocks. Is not performed.
[0024]
【The invention's effect】
As described above, the present invention relates to a transplanting machine including a planting mechanism 15 for scraping a seedling from the seedling mounting table 13 and transplanting it to a field, in a transmission path for transmitting power from the engine 2 to the planting mechanism 15. Are provided with inter-stock transmission mechanisms 30, 35 and a rotary transmission mechanism 36 for rotating the planting mechanism 15 at a constant speed or unequal speed, and the rotary transmission mechanism 36 is used to perform a shift operation of the inter-stock transmission mechanisms 30, 35 between the small stocks. Is switched to constant-speed rotation in response to the change in speed, and the speed is switched to unequal speed in response to the speed change operation to the wide stock side. The planting power is changed by the speed change operation to the wide stock (K4 to K6) side. Is transmitted to the planting mechanism 15 via a non-constant speed transmission path, and since the planting mechanism 15 rotates at a non-uniform speed, the operating speed during one cycle of planting is made non-uniform without changing the stationary planting locus. Because it can be changed, planting during planting travel By configuring the planting one period as soil operation speed increases the drag of the seedlings in the wide strains can be prevented.
On the other hand, by shifting the gears to the side between the small plants (K1 to K3), the planting power is transmitted to the planting mechanism 15 via the constant speed transmission path, and the planting mechanism 15 rotates at a constant speed, so that the planting travel is performed. In this case, the operation speed in the soil is not unnecessarily increased, and stable planting is enabled.
Further, since the switching between the constant speed and the non-constant speed is simultaneously performed by the speed change operation of the inter-gear speed change mechanisms 30, 35, not only the speed change operation can be simplified, but also the driving of the planting mechanism 15 suitable between the stocks is performed.
Further, the transmission path of the planting power is automatically changed to a constant-speed transmission path with a small load variation by a speed change operation between small plants (K1 to K3) in which the rotation speed of the planting mechanism 15 is relatively high and the driving load is large. Since the transmission is transmitted to the planting mechanism 15 through the above, the vibration caused by the load fluctuation can be reduced as compared with the case where the planting mechanism 15 rotates at a non-uniform speed at a high speed.
[Brief description of the 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 side view showing an engine and a transmission case.
FIG. 4 is a development view of a mission case.
FIG. 5 is a development view showing a planting power transmission system.
FIG. 6 is a development view showing an inter-stock speed change mechanism and a non-uniform speed transmission mechanism.
FIG. 7 is a development view showing an operation system of the second inter-gear transmission mechanism.
[Explanation of symbols]
2 Engine 13 Seedling stand 15 Planting mechanism 30 Stock change mechanism (first stock change mechanism)
35 inter-stock transmission mechanism (second-stock transmission mechanism)
36 Rotary transmission mechanism

Claims (1)

In a transplanting machine provided with a planting mechanism (15) for scraping a seedling from a seedling mounting table (13) and transplanting it to a field, a transplanting mechanism for transmitting power from an engine (2) to the planting mechanism (15) is provided. An inter-stock speed change mechanism (30, 35) and a rotation speed change mechanism (36) for rotating the planting mechanism (15) at a constant or unequal speed are provided. The transplanter is characterized in that it is configured to switch to constant-speed rotation in response to the shift operation to the side between small-cap stocks, and to switch to unequal speed in response to the shift operation to the wide-cap stock side.

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