JP5763150B2 - Rice transplanter work machine transmission - Google Patents

Description

  The present invention relates to a work machine transmission for a rice transplanter that controls the posture of a planted seedling.

  In conventional rice transplanters, a planting part is connected to the rear of the traveling part, a planting mission case is provided in the planting part, and a planting claw is interlocked to the planting mission case. By planting the plant, the seedlings can be cut from the seedling mat on the seedling stand separately placed on the planting mission case and planted in the field. A seedling that can be planted in a field by changing the planting operation speed of the planting claw via the inter-strain transmission mechanism by operating the inter-strain transmission lever by interlocking and connecting the inter-strain transmission lever to the inter-strain transmission mechanism. Some have made it possible to change the stock interval.

JP-A-9-149717

  However, in the rice transplanter as described above, when planting with a small number of plants per unit area, the planting drive rotates at a constant speed, so that the planted seedling is in a forward leaning posture and hinders growth. There was a problem to do.

  Accordingly, an object of the present invention is to provide a work machine transmission for a rice transplanter that can contribute to the control of the posture of a planted seedling.

Therefore, the invention described in claim 1 is a rice transplanter that includes a transmission that shifts the engine power, the engine power is transmitted to the input shaft of the transmission, and a plurality of speeds are changed to an inconstant speed and a constant speed. of the working machine transmission, with the input shaft, the speed change mechanism is provided to the shaft between the output shaft, the transmission mechanism that transmits switching to the constant velocity and non-uniform driving force of the planting unit It is characterized by.

Furthermore, the invention described in claim 2 is characterized in that a gear for transmitting the inconstant speed driving force is loosely fitted on a shaft for transmitting the engine power.
Further, in the invention according to claim 3, a gear that transmits the inconstant speed driving force about the axis of the input shaft is loosely fitted, and the rotational speed of the input shaft and the inconstant speed driving force are reduced. The rotation speed of the gear to be transmitted is different.

  According to a fourth aspect of the present invention, there is provided an inter-substrain transmission mechanism that is arranged in series with the transmission and that shifts the driving force transmitted to the planting unit.

According to the first aspect of the present invention, the working machine of the rice transplanter is provided with a transmission that shifts the engine power, the engine power is transmitted to the input shaft of the transmission, and the gear shift is performed at multiple speeds at an inconstant speed and a constant speed. in transmission, the input shaft, the speed change mechanism is provided to the shaft between the output shaft, since the transmission mechanism is transmitted is switched to the constant velocity and non-uniform driving force of the planting unit, the planting output shaft The drive of the planting can be changed in multiple stages, and can be switched between constant speed and non-constant speed, so the drive of the planting output shaft can be changed finely, and the planting work can be finely adjusted it can. Therefore, the posture of the seedling planted can be controlled in accordance with the state of the seedling planting work in a configuration that can reduce the number of parts, save space, and improve productivity .

  Furthermore, according to the invention described in claim 2, since the gear for transmitting the inconstant speed driving force is loosely fitted on the shaft for transmitting the engine power, when switching from the constant speed to the inconstant speed is performed. Can idle a gear that is loosely fitted on a shaft that transmits engine power, and can drive the planting output shaft at a non-uniform speed via a gear that meshes with the gear. Accordingly, it is possible to control the posture of the seedling planted in accordance with the situation of the seedling planting operation.

  According to the third aspect of the present invention, the gear for transmitting the inconstant speed driving force around the axis of the input shaft is loosely fitted, and the rotational speed of the input shaft and the inconstant speed driving force are transmitted. Since the rotational speed of the gears is different, when switching from constant speed to inconstant speed, the input shaft and the loosely fitted gear are rotated at different speeds and meshed with the loosely fitted gear. The planting output shaft can be driven at unequal speed via the gear. Accordingly, it is possible to control the posture of the seedling planted in accordance with the situation of the seedling planting operation.

  According to the fourth aspect of the present invention, since the sub-strain shifting mechanism is provided in series with the speed change device for shifting the driving force transmitted to the planting portion, the planting output is switched by the strain shifting switching mechanism. The shaft drive can be switched between sparse planting (non-uniform speed) and dense planting (constant speed), and the planting output shaft drive can be changed with the sub-strain shifting mechanism. It is possible to finely change the driving of the plant and fine adjustment of the planting work can be performed. Therefore, the posture of the seedling planted can be controlled more accurately.

It is a side view of the principal part of a riding rice transplanter. FIG. It is a side view of a rotary case and its vicinity. FIG. It is explanatory drawing which shows a part in planting transmission case. It is explanatory drawing which shows the one aspect | mode which performs a stock shift.

  Embodiments of the present invention will be described below based on examples shown in the drawings. FIG.1 and FIG.2 is the side view and top view of the principal part of a riding rice transplanter. The outline of the riding rice transplanter is as follows. The vehicle body frame (11) of the traveling vehicle body (10) on which the operator is boarded is provided with an engine (12) at the front and a transmission case (13) for shifting the output of the engine (12) in multiple stages at the rear. The front wheels (15) for paddy field travel are supported on both front sides of the transmission case (13) via the front axle case (14), and the paddy field travel is performed on both rear sides of the transmission case (13) via the rear axle case (16). A service rear wheel (17) is supported. The engine (12) and its neighboring members are covered with a bonnet (18), and the mission case (13) and its neighboring members are covered with a vehicle body cover (20) having a step (19). A driver's seat (21) is attached to the upper portion of the vehicle body cover (20), and a steering handle (22) is provided in front of the driver's seat (21).

  At the rear of the traveling vehicle body (10), there is a planting part (30) having a seedling stand (31) for multi-row planting and a plurality of planting claws (32). The planting part (30) is connected to the traveling vehicle body (10) using a three-point lifting link mechanism including a top link (33) and a lower link (34). And the planting part (30) is comprised so that raising / lowering is possible by the expansion-contraction operation | movement of the hydraulic cylinder interposed between the rear part of the traveling vehicle body (10) and the lower link (34). In addition, the plate-shaped forward tilting seedling platforms (31) installed at the front and rear and lower positions are arranged in the center and left and right planting transmission cases (via the lower guide rail (35) and the upper guide rail (36)). 37) is supported so as to be slidable in the left-right direction. Below the planting transmission case (37), the center and left and right planting flat floats (38) and (39) are supported via planting depth adjusting members. The planting part (30) is lowered and the floats (38) and (39) are landed to plant the planting depth to set the seedling to be taken out from the seedling mat on the seedling mount (31). The appendix (30) is configured.

  3 and 4 are a side view and a plan view of the rotary case (40) of the planting part (30) and the vicinity thereof. Power is transmitted to the planting transmission case (37) via a drive shaft extending from the rear portion of the transmission case (13). And the input shaft (41) pivotally supported by the rear end of the planting transmission case (37) is rotationally driven by the sprocket in the planting transmission case (37) and the chain wound around the sprocket. The rotary case (40) fixed to the input shaft (41) rotates counterclockwise in a side view of FIG. 1 by the rotational drive of the input shaft (41). A pair of planting claw cases (60) and (60) are arranged at positions symmetrical about the rotational axis of the rotary case (40), and are planted at the tip of the planting claw case (60). A claw (32) is attached.

  The rotary case (40) is hollow and can be divided into two vertically, and a sun gear (42) is fitted to the input shaft (41). An intermediate gear (44) that meshes with the sun gear (42) and has the same number of teeth as the sun gear (42) is loosely fitted to the intermediate shaft (43) and is rotatably provided. A rotary arm shaft (47) is loosely fitted on the rotary cam shaft (45). The rotary arm shaft (47) is fitted with a planetary gear (46) that is always meshed with the intermediate gear (44) and has the same number of teeth as the intermediate gear (44) and the sun gear (42). .

  The sun gear (42), the intermediate gear (44), and the planetary gear (46) that constitute such a planetary gear mechanism are non-circular gears having no center or focal point, or eccentric circular gears that are off-center. Further, the intermediate gear (44) and the planetary gear (46) are configured as double gears by superimposing the sub gears (44 ′) and (46 ′), respectively. A ring spring (49) that engages with a pin (48) projecting from the planetary gears (46) (46 ') is disposed on the side of the sub gear (46'), and the double planetary gear (46) ( 46 ′) is biased so as to be displaced from each other, and the planetary sub-gear (46 ′) and the intermediate sub-gear (44 ′) are engaged to prevent backlash of the planetary gear (25).

  The planting claw case (60) is fixed to the rotary arm shaft (47) loosely fitted to the rotary cam shaft (45) so that the posture can be adjusted. Therefore, when the rotary case (40) as a rotating body is rotated by the input shaft (41) that is the rotation drive shaft, the intermediate gear (44) meshing with the sun gear (42) is accordingly rotated. It rotates in the same direction as the rotation angle. At the same time, the planting claw case (60) interlocked with the intermediate gear (44) via the planetary gear (46) and the rotary arm shaft (47) is rotated by the rotation of the intermediate gear (44). ) Revolves in the opposite direction to the direction of rotation. Thereby, the planting claw case (60) pivots around the input shaft (41) in a posture facing the direction of the seedling table (31), and the planting claw ( 32) descends from top to bottom. During the turning movement, the planting claw (32) is held at the tip of the seedling claw (32) by splitting and holding one seedling from the seedling mat on the seedling stand (31), and continuing the turning movement. To plant seedlings in the field.

  Since the sun gear (42), intermediate gear (44), and planetary gear (46) constituting the planetary gear mechanism are all non-circular gears or eccentric circular gears, the locus of the tip of the planting claw (32) is As shown in FIG. 3, the front side of planting the seedling is curved, and the rear side of planting the seedling is a deformed elliptical loop close to a straight line. Therefore, the planting claw (32) has a structure that rises rapidly from the field scene immediately after planting a seedling. If the sun gear (42), the intermediate gear (44), and the planetary gear (46) are non-circular gears, it is possible to deal with sparse planting of about 40 plants.

  In the planting claw case (60), as shown in FIGS. 2 and 3, a push arm (62) is disposed on the outer side end of the rotary cam shaft (45) via a cam (61). ing. An extrusion claw (64) is attached to the tip of a push rod (63) that cooperates with the push arm (62). At the time of planting in the field, the push-out claw (64) is pushed out to the tip of the planting claw (32) by the push-out operation of the push rod (63), so that the seedling held by the planting claw (32) is released. I have to.

  That is, when the cam (61) rotates with the rotation of the rotary cam shaft (45) and the tip of the lower end of the push arm (62) is positioned at the step of the cam (61), the push arm (62) Is pivoted forward about the support shaft (65) by the urging force of the push spring to project the push rod (63), while the lower end of the push arm (62) is engaged with the cam (61). When they are engaged, the push arm (62) is rotated backward about the support shaft (65) against the urging force of the push spring to retract the push rod (63). . Thus, the push rod (63) protrudes with the turning movement of the planting claw case (60), and the pushing claw (64) is pushed out by the projecting operation of the push rod (63), so that the planting claw (32 ) Remove and plant the seedlings that are gripped.

  FIG. 5 is an explanatory view showing a part of the planting transmission case (37). The input shaft (41) pivotally supported at the rear end of the planting transmission case (37) is connected to the lateral feed drive bevel (371) via the chain, the vertical feed cam shaft (372) and the chain via the chain. A counter gear (374) is provided between the lateral feed gear (373) communicated with each other. The counter gear (374) can be exchanged according to the application. For example, when the lateral feed of the seedling stage (31) is performed at a non-uniform speed, a non-circular gear is used and sparsely planted with one arm. In this case, a gear having a gear ratio of 1: 2 is used, and when changing the locus of the planting claw (32), the timing is adjusted with a circular gear having a gear ratio of 1: 1. The counter gear (374) is marked with “S” or “O” timing adjustment marks. By operating the shift key (374a) and shifting the timing of the counter gear (374) with respect to the lateral feed drive bevel (371) by about 30 degrees from "O" to "S", the timing of the lateral feed of the seedling is loosely planted. It will come in time with you. Therefore, the amount of seedlings is stabilized without changing the parts in the planting transmission case (37), optimizing the timing of seedling feeding, and changing the upper stop position.

  FIG. 6 is an explanatory diagram showing a state of performing the inter- stock shift. The inter-strain shift switching mechanism (inter-strain shift) provided on the input shaft (131) and the idle shaft (132) makes the rotation of the planting drive nonuniform at the time of sparse planting, and the planting claw (32) is at bottom dead center. The speed is high in the vicinity. That is, at the time of loose planting, the planting output shaft (134) is driven via the non-circular gear (71) disposed on the idle shaft (132) meshing with the gear (28) of the input shaft (131). This prevents seedlings from being planted in a leaning posture during sparse planting and contributes to the control of the seedling posture.

  That is, when the planting output shaft (134) is driven at a non-uniform speed, the transmission mechanism having the gear (75) in FIG. 6 is engaged with the gear (74) loosely fitted on the input shaft (131). By matching, the driving force of the input shaft (131) causes the idle shaft (132) to rotate at a non-uniform speed from the gear (28) via the non-circular gear (71), and the power of the idle shaft (132) is increased. From the gear (24) provided on the idle shaft (132), the gear (74) passes through the gear (74) to the planting output shaft (134) from the transmission mechanism via the inter-substrain transmission shaft (133) and the sub-subsidiary transmission. As transmitted.

  Therefore, the inter-strain shift switching mechanism (inter-strain shift) is provided on the input shaft (131) and the idle shaft (132), and the rotation of the planting output shaft (134) is made constant speed / unconstant speed by the inter-strain shift switching mechanism. The non-circular gear (71) arranged on the idle shaft (132) meshing with the gear (28) provided on the input shaft (131) and the gear (28) provided on the input shaft (131) can be switched. ), The driving force of the input shaft (131) drives the planting output shaft (134) to rotate the planting drive at a non-uniform speed. The posture of the planted seedling can be controlled.

  Further, since the planting output shaft (134) is transmitted from the idle shaft (132) to the idle shaft (132) via the inter-stock transmission shaft (133), the power of the input shaft (131) is transferred to the idle shaft (132). 132) can be reliably switched to unequal speed, and this unequal speed rotation can be transmitted to the planting output shaft (134).

Furthermore, since the planting claw (32) is configured to be high speed near the bottom dead center, the posture of the planted seedling can be controlled.
And since the sub-strain shifting mechanism (sub-strain shifting) is provided between the input shaft (131) and the planting output shaft (134) of the work equipment transmission, the planting output shaft is operated by the strain shifting mechanism. In addition to being able to switch the drive of (134) between sparse planting (irregular speed) and dense planting (constant speed) dense planting first stage and dense planting second stage, Constant speed), and the densely planted first stage and densely planted second stage driving force at the time of dense planting (constant speed) can be further switched to two stages by the sub-substrain shifting mechanism (sub-substrain shifting). It is possible to make fine adjustments to the attached work.

  Further, in the working machine transmission of the rice transplanter, which includes a transmission for shifting the engine power, the engine power is transmitted to the input shaft (131) of the transmission, and shifts at multiple speeds to an inconstant speed and a constant speed. A plurality of gears (28) that constantly rotate by the rotational driving force (131) and transmit the inconstant speed driving force, and gears (72) and (73) that transmit the constant speed driving force, are provided. Since any one of (28), (72), and (73) is selected, the driving force of the planting part (30) is switched between constant speed and non-constant speed, so that the planting output shaft (134 ) Can be changed in multiple stages, and can be switched between constant speed and non-uniform speed, so that the drive of the planting output shaft (134) can be finely changed, and the planting work can be finely adjusted. It can be performed. Accordingly, it is possible to control the posture of the seedling planted in accordance with the situation of the seedling planting operation.

  Further, since the gear (74) for transmitting the constant speed driving force is loosely fitted on the shaft (131) for transmitting the engine power, the engine power is transmitted when switching from the constant speed to the inconstant speed. The gear (74) loosely fitted on the rotating shaft (131) is idled, and the planting output shaft (134) can be driven at a non-uniform speed through the gear (24) meshing with the gear (74). Accordingly, it is possible to control the posture of the seedling planted in accordance with the situation of the seedling planting operation.

  Further, a gear (74) that transmits an inconstant speed driving force about the axis of the input shaft (131) is loosely fitted, and a rotational speed of the input shaft (131) and a gear that transmits the inconstant speed driving force ( 74), when the speed is switched from constant speed to non-constant speed, the input shaft (131) and the loosely fitted gear (74) are rotated at different speeds to loosely fit. The planting output shaft (134) can be driven at a non-uniform speed through the gear (24) meshing with the gear (74). Accordingly, it is possible to control the posture of the seedling planted in accordance with the situation of the seedling planting operation.

  And since it is arranged in series with the transmission and includes a sub-strain shifting mechanism for shifting the driving force transmitted to the planting part (30), the planting output shaft (134) is driven by the strain shifting mechanism. Since it is possible to switch between sparse planting (non-uniform speed) and dense planting (constant speed), and the drive of the planting output shaft (134) can be changed by the sub-strain shifting mechanism, the planting output shaft (134 ) Can be finely changed, and the planting work can be finely adjusted. Therefore, the posture of the seedling planted can be controlled more accurately.

  The present invention can be applied to any rice transplanter equipped with an inter-variety transmission shaft.

DESCRIPTION OF SYMBOLS 10 Traveling vehicle body 11 Body frame 12 Engine 13 Mission case 131 Input shaft 132 Idle shaft 133 Stock transmission shaft 134 Planting output shaft

Claims (4)

A transmission for shifting engine power,
The engine power is transmitted to the input shaft of the transmission,
In the work machine transmission of rice transplanter that shifts multiple stages to non-uniform speed and constant speed,
A transmission mechanism is provided on the shaft between the input shaft and the output shaft ,
Working machine transmission of rice transplanter, characterized by transmitting the transmission mechanism is switched to the constant velocity and non-uniform driving force of the planting unit.   2. A work machine transmission for a rice transplanter according to claim 1, wherein a gear for transmitting the inconstant speed driving force is loosely fitted on a shaft for transmitting the engine power.   A gear that transmits the inconstant speed driving force around the axis of the input shaft is loosely fitted, and the rotational speed of the input shaft is different from the rotational speed of the gear that transmits the inconstant speed driving force. The working machine transmission for a rice transplanter according to claim 1 or 2.   The rice transplanter according to any one of claims 1 to 3, further comprising a sub-strain shifting mechanism that is arranged in series with the transmission and that shifts the driving force transmitted to the planting unit. Work machine transmission.

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