JP4110743B2 - Fertilizer transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a power transmission device in a fertilizer transplanter.
[0002]
[Prior art]
A mission case at the front part of the aircraft, a seedling planting unit including a seedling planting device behind the traveling vehicle body with an engine disposed on the rear side thereof, and a fertilizer storage unit and a fertilizer feeding unit of the fertilizer application are provided on the rear upper side of the traveling vehicle body The applied fertilizer transplanter is known, and this fertilizer transplanter transmits the rotational power (PTO) for driving the work device taken out from the mission case to the branch case provided at the rear of the traveling vehicle body via the PTO transmission shaft. Therefore, the fertilization power and the planting power are branched, and the fertilizer and the seedling planting unit are driven by each power. Rice transplanters are generally equipped with an inter-strain adjustment device that adjusts the seedling planting planted in the field by changing the transmission speed to the seedling planting device. It was provided inside the case.
[0003]
[Problems to be solved by the invention]
In other words, an inter-strain adjustment device was installed on the transmission side of the branch between fertilization power and planting power.For this reason, when inter-strain adjustment operation of the inter-strain control device was performed to change between strains, planting power Not only the rotational speed of the fertilizer but also the rotational speed of the fertilizer power was changed, resulting in a disadvantage that the fertilizer feed amount changed. Therefore, each time the strain is changed, it is necessary to adjust the fertilizer feeding mechanism in order to keep the fertilizer feeding amount appropriately, which is very troublesome. An object of the present invention is to eliminate this inconvenience.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is configured as follows. That is, the fertilizer transplanter according to the present invention branches the rotational power for driving the work device taken out from the mission case arranged at the front part of the machine body into two at the power branching part arranged at the rear part of the machine body, In the fertilizer field planting machine that drives the seedling planting device and the fertilizer device with the power of the above, the inter-strain adjustment device that adjusts between the seedling plants planted in the field by changing the rotational speed of the power transmitted to the seedling planting device Provided on the seedling planting device side from the power branching section , the rotational power for driving the working device taken out from the transmission case is transmitted to the planting clutch case via the PTO transmission shaft, and branches into two in the planting clutch case In the planting clutch case, the first shaft connected to the PTO transmission shaft and the second shaft are provided, and fertilization power is taken out from the first shaft, Planting power is extracted from two shafts, the first shaft is provided with a drive gear that rotates integrally with the shaft, and the second shaft is provided with a driven gear that is rotatable with respect to the shaft. And the driven gear constitute a stock adjustment device, and a first gear integrated with the driven gear and a second gear rotatably provided on the first shaft mesh with each other, and are integrated with the second gear. The first eccentric gear and the second eccentric gear that rotates integrally with the second shaft are configured to mesh with each other .
[0005]
With this configuration, even if an inter-strain adjustment operation of the inter-strain adjustment device is performed to change the strain, the rotation speed of the fertilizer application power is not changed, so that the fertilizer feed amount does not change.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments shown in the drawings will be described.
FIG.1 and FIG.2 is the whole side view and top view of the fertilizer planting machine by this invention. This fertilizer planter 1 is provided with a five-planted seedling planting portion 4 on the rear side of the traveling vehicle body 2 via an elevating link device 3 so as to be movable up and down. A storage unit 120 and a fertilizer supply unit 121 are provided. Further, at the left and right end portions of the front portion of the traveling vehicle body 2 are provided with preliminary seedling frames 6,.
[0007]
The traveling vehicle body 2 is a four-wheel drive vehicle provided with a pair of left and right front wheels 7 and 7 and rear wheels 8 and 8 as drive wheels, and is disposed at the front of the airframe as shown in FIG. Front wheel axle cases 11, 11 are extended laterally from the left and right side surfaces of the transmission case 10, and the front wheels 7, 7 are rotatably supported by front wheel final cases 12, 12 provided at the front end of the transmission case 10. In addition, the front end portions of the pair of left and right main frames 13 and 13 are fixed to the rear portion of the transmission case 10 and are fixedly provided at the front end portion of the rear frame 14 that extends laterally from the rear end portion of the main frame. The rear wheels 8 and 8 are rotatably supported on the wheel final cases 15 and 15.
[0008]
The upper side of the engine 20 mounted above the front and rear central portions of the main frames 13, 13 is covered with an engine cover 21, and a seat 22 is installed thereon. In front of the seat 22 is a bonnet 23 incorporating various operation mechanisms, and a steering handle 24 for steering the front wheels 7 and 7 as steering wheels is provided above the bonnet 23. Around the lower end of the engine cover 21 and the bonnet 23 is a horizontal step 25 in which a person can walk. In the figure, reference numeral 30 is a change lever, 31 is a planting lift lever, 32 is a vehicle speed lever, 33 is a clutch pedal, 34L and 34R are brake pedals, and 35 is a seedling planting part lift lever.
[0009]
Next, the power transmission mechanism of the traveling vehicle body 2 will be described.
The rotational power extracted by the engine output shaft 40 protruding from the left side surface portion of the engine 20 is transmitted to the relay shaft 43 by the first belt transmission device 41 configured as a continuously variable transmission, and further from the relay shaft, the main clutch function. Is transmitted to the mission input shaft 45 protruding from the left side surface portion of the mission case 20.
[0010]
FIG. 4 shows a configuration of a first belt transmission device that is a continuously variable transmission. The first belt transmission device 41 hangs a transmission belt 52 between a drive pulley 50 fitted to the engine output shaft 40 and a driven pulley 51 fitted to the hydraulic pump drive shaft 43, and tension is applied to the belt by a tension roller 53. Has been granted. The drive pulley 50 and the driven pulley 51 are split pulleys, and the transmission ratio from the engine output shaft 40 to the hydraulic pump drive shaft 43 is changed by changing the effective diameters of the pulleys 50 and 51 to opposite sides of each other. To do. Specifically, the configuration is as follows.
[0011]
One component 50a (51a) of the drive pulley 50 (driven pulley 51), which is a split pulley, is fixed to the shaft 40 (43), and the other component 50b (51b) is slid in the axial direction with respect to the shaft 40 (43). It is free to move. The position of the movable component 50a (51a) is regulated by a speed change operation cam 54 (64) that can rotate freely through a bearing 53 (63). An annular ridge 54a (64a) is formed on the outer surface side of the speed change operation cam 54 (64) depending on the circumferential position, and the ridge 54a (64a) is fixed to the fixed cam 55 (64a). 65) is in contact with a roller 55a (65a).
[0012]
A shift operation rod 56 that is linked to the operation of the vehicle speed lever 32 is connected to the arm 54 b of the drive transmission operation cam 54. Further, another arm 54 c of the drive speed change operation cam 54 and the arm 64 b of the driven speed change operation cam 64 are connected by a connecting rod 57. Thus, when the speed change operation rod 56 is moved back and forth, the speed change operation cam 54 (64) rotates to change the contact point of the protrusion 54a (64a) to the roller 55a (65a), and the speed change operation cam 54 (64). ) And the movable constituent member 50b (51b) whose position is regulated move in the axial direction in accordance with the tension of the transmission belt 52, so that the effective diameters of the driving pulley 50 and the driven pulley 51 are changed to the opposite sides. It is. The lower the effective diameter of the driving pulley 50 and the smaller the effective diameter of the driven pulley 51, the lower the transmission speed.
[0013]
5 and 6 show the internal structure of the mission case. The rotational power input to the mission input shaft 45 via the second belt transmission 44 as the main clutch has main shift positions having “road running speed”, “normal planting speed”, “super low speed”, and “neutral”. It is transmitted to the main transmission shaft 71 via the transmission 70. A part of the rotational power of the main transmission shaft 71 is transmitted to the brake shaft 73 via the forward / reverse switching device 72 as traveling power. The forward / reverse switching device 72 switches between “forward” that transmits power in the reverse direction from the main transmission shaft 71 to the brake shaft 73, “reverse” that transmits power in the same direction, and “PTO” that does not transmit power. It is like that. By operating the change lever 30, the main transmission 70 and the forward / reverse switching device 72 are shift-changed in conjunction with each other. Further, only the forward / reverse switching device 72 is shift-changed by the operation of the vehicle speed lever 32.
[0014]
A four-wheel brake device 75 is provided on the brake shaft 73. The rotational power of the brake shaft 73 is distributed and transmitted to the left and right front axles 77, 77 by the differential device 76, and further transmitted to the front wheel final cases 12, 12 by the front axle to drive the front wheels 7, 7. . The left and right front axles 77, 77 are respectively provided with rear wheel clutch / brake devices 78, 78, and the rear wheel drive power taken out from the rear surface of the transmission case 10 via the devices is supplied to the rear wheel transmission shaft 79, 78. 79 is transmitted to the rear-wheel final cases 15 and 15 through 79 to drive the rear wheels 8 and 8.
[0015]
The remainder of the rotational power of the main transmission shaft 71 is transmitted to the PTO clutch shaft 83 via the pair of sub-transmission gears 81 and 82 as rotational power (PTO) for driving the work device. The inter-subsidiary transmission gears 81 and 82 are disposed on the inner side of the right side surface of the mission case 10, and a cover 84 that is detachably attached to the outer side of the transmission case 10 can be removed and replaced with an inter-subsidiary auxiliary transmission gear. Is possible. The PTO clutch shaft 83 is composed of a first shaft 83a, a second shaft 83b, and a third shaft 83c that have the same axis and are rotatable with respect to each other. Power is transmitted between the first shaft 83a and the second shaft 83b by an external operation. A safety clutch 86 is provided between the PTO clutch 85 to be turned off, and between the second shaft 83b and the third shaft 83c to cut off the transmission when the load exceeds a certain level. Then, it is transmitted to the planting clutch case 88 by the PTO transmission shaft 87 connected to the rear end of the PTO clutch shaft 83.
[0016]
FIG. 7 is a sectional view of the planting clutch case. A first shaft 91 connected to the PTO transmission shaft 87 via a universal joint 90 and a second shaft 92 parallel to the first shaft 91 are rotatably supported in the planting clutch case 88. It strains main transmission driving gear G1, G2 are the fitted slidably in the axial integral rotation and axially to the first shaft 91, second shaft 9 2 strains main transmission driven gear G3 is in, G4 is the axis It fits in a freely rotatable manner in the axial direction, and these constitute a stock-to-stock adjustment device 93. A gear G5 formed integrally with the inter-subsidiary main transmission driven gears G3 and G4 meshes with a gear G6 that is rotatably fitted to the first shaft 90. A gear G7 formed integrally with the gear G6 meshes with an eccentric gear G8 that rotates integrally with the second shaft 92.
[0017]
The rotational power (PTO) input to the planting clutch case 88 is divided into two at the middle part of the first shaft 91, a part of which is taken out as fertilization power from the rear end of the first shaft 91, and the rest is between the stocks. As planting power from the rear end of the second shaft 92 via the main transmission drive gear G1 (or G2), the inter-company main transmission driven gear G3 (or G4), the gear G5, the gear G6, the eccentric gear G7, and the eccentric gear G8. It is taken out. That is, the contact point between the first shaft 91 and the inter-strain main transmission drive gear G1 (or G2) is the power branching portion A, and the inter-strain adjustment device 93 is provided closer to the seedling planting device than the power branching portion A.
[0018]
The inter-strain adjustment device 93 slides the inter-strain main shift drive gears G1 and G2 in the axial direction by the shifter 93a so that G1 and G3 mesh with each other, G2 and G3 mesh with each other, and G2 and G4 mesh with each other. It is designed to adjust between the three stages. In the figure, 94 is an operation knob of the inter-strain adjustment device 93. The gears G7 and G8 are eccentric gears, and the rotation speed of the second shaft 92 is periodically changed so that each part of the seedling planting part 4 performs an appropriate operation.
[0019]
A fertilization clutch 95 for turning on and off the transmission of fertilization power is provided on the lower side of the transmission than the power branching portion A in the first shaft 91. The fertilizer clutch 95 includes a drive clutch body 95a and a driven clutch body 95b which are pawl clutch mechanisms. When the drive clutch body 95a is pressed against the driven clutch body 95b by a spring 95c, transmission is performed, and the drive clutch is driven by an externally operated shifter 95d. When the body 95a is moved forward, the transmission is cut off. Further, since the pawl of the drive clutch body 95a and the pawl of the driven clutch body 95b are in contact with each other on an inclined surface, the drive clutch body 95a escapes forward and the transmission is cut off when a load exceeding a certain level is applied. That is, the fertilization clutch 95 also has a function as a safety clutch. Since the functional part of the fertilizer application clutch and the functional part are the same member as the safety clutch, the whole can be simplified, lightweight, and inexpensive.
[0020]
Further, the second shaft 92 is provided with a planting clutch 96 for turning on / off the transmission of planting power by a clutch pin 96a operated externally.
[0021]
The power transmission mechanism is configured as described above, and the shift position of the main transmission 70 and the forward / reverse switching device 72 is selected according to the traveling mode, and the vehicle speed is adjusted steplessly by the first belt transmission 41. When the main transmission 70 is shifted to “normal planting speed” and “very low speed”, working power (PTO) is output from the mission case 10 and the seedling planting unit 4 and the fertilizer application device 5 are activated. . Since the rotational speeds of the traveling power and the working power are proportional, the seedling planting unit 4 and the fertilizer application device 5 operate at an appropriate speed that matches the vehicle speed.
[0022]
When the shift position of the inter-strain adjustment device 93 is changed, the strain of seedlings planted in the field changes. Since the inter-strain adjustment device 93 is provided closer to the seedling planting device than the power branching portion A for fertilization power and planting power, the amount of fertilization does not change even if the strain is changed. For this reason, it is not necessary to adjust a fertilizer application at the time of change between strains. Also, the stock can be changed by exchanging the stock sub transmission gears 81 and 82. It is easy to exchange the inter-subsidiary transmission gears 81 and 82.
[0023]
In the lifting link device 3, an upper link 100 and a pair of left and right lower links 101, 101 that are parallel to each other in a side view are rotatably supported by a link support frame 99 that protrudes upward from the rear frame 14, and each of these links is supported. A connecting frame 102 is pivotally connected to the rear end. A rolling shaft 103 projecting forward from the seedling planting part 4 is inserted into the connection frame 102, and the seedling planting part 4 is connected to be freely rollable. A swing arm 104 is provided so as to rotate integrally with the lower links 101, 101, and a piston rod of a lifting hydraulic cylinder 105 whose base side is supported by the main frame 13 is connected to the swing arm 104. When the elevating hydraulic cylinder 105 is expanded and contracted, each link is rotated up and down, and the seedling planting part 4 is raised and lowered while maintaining a substantially constant posture.
[0024]
The seedling planting unit 4 places a seedling on the seedling planting unit frame 110 having a built-in transmission mechanism and reciprocates left and right, and the seedling feeding belt 111a,... A seedling stage 111 that supplies the seedling outlet 111b, one by one, and four sets of seedling planting devices 113 that extract the seedling supplied to the seedling outlet 111b, and plant them on the paddy surface. The center float 114 and the side floats 115 and 115 are assembled. Planting power is transmitted from the second shaft 92 of the planting clutch case 88 to the seedling planting unit 4 through the planting transmission shaft 116.
[0025]
The fertilizer application device 5 feeds the fertilizer in the fertilizer storage unit 120 shared by the respective strips downward by a fixed amount by the fertilizer feed unit 121,..., And applies the fed fertilizer by the air supplied from the blower 122. It passes through to the fertilizer application guide 124,... And is dropped into a fertilizer groove formed in the vicinity of the side portion of the seedling planting strip by a grooved body 125,... Provided on the front side of the fertilizer guide. Each fertilizer supply part 121 is driven by fertilizing power transmitted from the first shaft 91 a of the planting clutch case 88.
[0026]
【The invention's effect】
As described above, since the fertilizer planter according to the present invention is provided with the inter-plant adjustment device on the seedling planting device side from the branch point where the working power is branched into the fertilization power and the planting power, Even if the inter-strain adjustment device is operated to adjust the fertilizer, the fertilizer power rate is not changed and the fertilizer feed rate does not change. For this reason, the fertilizer feed amount can always be kept appropriate, and it is no longer necessary to adjust the fertilizer when changing between strains. Furthermore, with the first eccentric gear and the second eccentric gear, the rotational speed of the second shaft can be changed periodically, and the seedling planting device can be operated properly.
[Brief description of the drawings]
FIG. 1 is a side view of a fertilizer planting machine.
FIG. 2 is a plan view of a fertilizer transplanter.
FIG. 3 is a plan view in which a part of a traveling vehicle body is omitted.
FIG. 4 is a plan sectional view of the first belt transmission device.
FIG. 5 is a cross-sectional view of the main body of the mission case.
FIG. 6 is a cross-sectional view of a PTO extraction part of a mission case.
FIG. 7 is a cross-sectional view of a planting clutch case.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fertilizer planting machine 2 Traveling vehicle body 3 Elevating link apparatus 4 Seedling planting part 5 Fertilizer 7 Front wheel 8 Rear wheel 10 Mission case 20 Engine 22 Seat 88 Planting clutch case 93 Stock adjustment apparatus 113 Seed planting apparatus

Claims (1)

The rotational power for driving the work device taken out from the mission case arranged at the front part of the machine body is branched into two at the power branching part arranged at the rear part of the machine body, and the seedling planting device and the fertilizer application device are divided by each power. In the fertilizer planting machine to be driven, an inter-strain adjustment device that adjusts between the strains of seedlings to be planted in the field by changing the rotational speed of the power transmitted to the seedling planting device is closer to the seedling planting device side than the power branching unit The planting clutch case is configured such that the rotational power for driving the working device taken out from the transmission case is transmitted to the planting clutch case via the PTO transmission shaft and branched into two in the planting clutch case. Inside, a first shaft connected to the PTO transmission shaft and a second shaft are provided, fertilization power is taken out from the first shaft, planting power is taken out from the second shaft, A drive gear that rotates integrally with the shaft is provided on the shaft, and a driven gear that is rotatable with respect to the shaft is provided on the second shaft. The drive gear and the driven gear constitute an inter-stock adjustment device, and the driven A first gear integrated with the gear and a second gear rotatably provided on the first shaft mesh with each other, and the first eccentric gear integrated with the second gear and the second shaft rotate together. A fertilizer transplanter characterized in that the second eccentric gear is engaged with each other .

Images