JP2006014650A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transplanter equipped with an irregularly speed-changing mechanism for transplanting, for irregularly speed-changing its transplanting power and suppressing the generation of the vibration caused by the change of torque of a transversely transmitted power to improve the stability of a transplanting part. <P>SOLUTION: This transplanter equipped with a seedling-loading stand 13 for loading the seedling, a transplanting mechanism 15 for raking the seedling from the seedling-loading stand 13 and transplanting it on a field, a transversal sending mechanism 50 for transversely sending the seedling-loading stand 13, a transplanting power transmission passage for transmitting the power to the transplanting mechanism 15, the irregularly speed-changing mechanism 38 installed at the planting power-transmitting passage and forming a change in the moving speed of the transplanting mechanism 15, and a transversely transmitted power transmission passage branched from the transplanting power transmission passage at a more downstream side than the irregularly speed-changing mechanism 38 and transmitting the power to the transversely transmitting mechanism 50 is provided by installing a transversal irregularly speed-changing mechanism 58 for negating the moving speed change caused by the irregularly speed-changing mechanism 38 for transplanting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transplanter provided with an inconstant speed conversion mechanism that changes a planting operation speed in one cycle without changing a planting cycle of the planting mechanism.

A transplanting machine that changes the planting operation speed during one cycle without changing the planting cycle of the planting mechanism by providing an inconstant speed conversion mechanism such as an eccentric gear in the planting power transmission path is known. (For example, refer to Patent Document 1). Usually, in this type of transplanter, the planting power is converted at an unequal speed so that the planting claw operation speed in the soil and the seedling scraping operation speed are increased. This not only prevents the seedling from being dragged by the planting nails, but also improves the seedling scraping performance of the planting nails.
JP 2002-238319 A

  By the way, this kind of transplanter is provided with a lateral feed mechanism that laterally feeds the seedling stage, and this lateral feed mechanism is operated with power branched from the planting power transmission path. However, in the case where the planting power transmission path is branched downstream of the inconstant speed conversion mechanism, the lateral feed power is also inconstant speed, so that vibration due to torque fluctuation occurs and the stability of the planting part decreases. There is a problem.

The present invention has been created in order to solve these problems in view of the above circumstances, a seedling stage on which a seedling is placed, and a seedling from the seedling stage, which is scraped off to the field. A planting mechanism for transplanting, a lateral feed mechanism for laterally feeding the seedling platform, a planting power transmission path for transmitting power to the planting mechanism, and the planting power transmission path, A non-constant speed conversion mechanism for planting that causes a change in the operating speed of the plant, and a branching from the planting power transmission path downstream of the non-constant speed conversion mechanism for planting to transmit power to the lateral feed mechanism In the transplanter equipped with the transverse feed power transmission path, the transverse feed power transmission path is provided with a non-uniform speed conversion mechanism for transverse feed that cancels the change in operating speed due to the non-constant speed conversion mechanism for planting. And If comprised in this way, it will become possible to convert the inconstant speed motive power which passed through the inconstant speed conversion mechanism for planting into constant speed motive power, and to transmit to a lateral feed mechanism. Thereby, generation | occurrence | production of the vibration by torque fluctuation | variation can be suppressed and the stability of a planting part can be improved.
Further, the planting unequal speed conversion mechanism converts planting power at an unequal speed so that the seedling scraping speed of the planting mechanism increases, and the lateral feed unequal speed conversion mechanism When the attaching mechanism scrapes off the seedling, the lateral feed power is converted at an unequal speed so that the lateral feed operation speed of the seedling stage is slowed down. If comprised in this way, since the amount of lateral movement of a seedling will become relatively small with respect to the amount of seedling cleaning movement of a planting mechanism, the scraping performance of a seedling can be improved.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3, reference numeral 1 denotes a traveling machine body of a passenger rice transplanter. The traveling machine body 1 includes an engine 2 mounted on a front part of the machine body, a transmission case 3 for inputting engine power, and a front axle case 4. A pair of left and right front wheels 5 attached via a rear axle and a pair of left and right rear wheels 7 attached via a rear axle case 6. Engine power is input to the transmission case 3 via a belt-type or hydraulic-type continuously variable transmission mechanism 8, and is transmitted to the front axle case 4, the rear axle case 6 and the planted PTO shaft 9 from here.

  A planting work part 11 is connected to the rear part of the traveling machine body 1 via a lifting link mechanism 10. The planting work part 11 includes a work part frame 12 connected to the lifting link mechanism 10 so as to be freely rollable (right and left swingable), and a seedling table 13 provided on the work part frame 12 so as to be capable of reciprocating left and right. A plurality of planting transmission cases 14 extending rearward from the working unit frame 12, a planting mechanism 15 provided at the rear end of the planting transmission case 14, and a vertical position below the planting transmission case 14 And a float 16 provided so as to be swingable. The power of the planting PTO shaft 9 (hereinafter referred to as planting power) transmitted to the planting work unit 11 is distributed to each planting transmission case 14 and a chain transmission mechanism (not shown) in the planting transmission case 14. )) To each planting mechanism 15.

  The planting mechanism 15 includes a rotating case 17 that rotates with 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) in the rotating case 17 so that the planting claw 19 provided at the tip portion draws a predetermined locus. That is, when the rotating case 17 rotates, the planting claw 19 scrapes off the seedling from the lower end of the seedling stage 13 and then reaches the planting position in the soil while drawing an arc that swells forward, and then linearly It is configured to draw a semi-moon-like stationary trajectory of rising (nail tip motion trajectory when traveling is stopped). Thereby, planting is performed twice each time the rotating case 17 rotates once.

  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. In addition, the planting claw trajectory of the planting mechanism 15 is set with reference to the standard stock, and if the planting operation speed is slowed to widen the planting stock, the amount of forward movement of the planting claw 19 as the aircraft progresses is increased. It grows in the soil and the planted seedlings are dragged. Therefore, when expanding between planting stocks, by changing the planting operation speed in one cycle without changing the planting cycle of the planting mechanism 15, the soil operation speed of the planting claw 19 is increased. It is necessary to increase the speed and prevent the seedling from being dragged. Hereinafter, a configuration for that purpose will be described.

  As shown in FIGS. 4 to 7, the transmission case 3 includes a cylindrical shaft 21 that is rotatably supported by the input shaft 20 for power input to the input shaft 20, and an intermediate transmission shaft that is parallel to the cylindrical shaft 21. 22, a stock transmission shaft 23 parallel to the intermediate transmission shaft 22, a cylindrical shaft 24 that is rotatably supported by the stock transmission shaft 23, and a cylindrical shaft 25 that is rotatably supported by the cylindrical shaft 24. It is comprised so that it may transmit to the planting PTO shaft 9 via.

  A main clutch mechanism 26 is configured between the input shaft 20 and the cylindrical shaft 21, and traveling power and planting power are intermittently connected according to the turning-on / off operation. A gear shaft 27 for extracting traveling power and a gear 28 for extracting planting power are integrally provided on the cylindrical shaft 21 on the transmission downstream side of the main clutch mechanism 26. The planting transmission gear 28 is always meshed. The planting power is transmitted to the intermediate transmission shaft 22 through the gear 29.

  Between the intermediate transmission shaft 22 and the transmission upstream side end portion of the inter-shaft transmission shaft 23, a first inter-shaft transmission mechanism 30 is configured. The first stock transmission mechanism 30 includes two gears 31 and 32 provided integrally with the intermediate transmission shaft 22 and a transmission gear 33 that is spline-fitted to the stock transmission shaft 23. The transmission gear 33 has three gear portions 33a, 33b, and 33c, and each gear portion 33a, 33b, and 33c selectively meshes with the two gears 31 and 32, so that a three-stage stock shift can be performed. enable.

  A torque limiter 34 is configured between the transmission downstream end of the inter-stock transmission shaft 23 and the transmission upstream end of the cylindrical shaft 24. Here, the planting power transmitted to the torque limiter 34 is constant speed rotation. As a result, the operating load of the torque limiter 34 becomes constant, and a stable limit operation is possible.

  A transmission gear 36 constituting a second inter-stock transmission mechanism 35 is splined to the transmission downstream end of the cylindrical shaft 24. The transmission gear 36 is speed-changed to a position where it engages with a gear 37 that is rotatably supported by the intermediate transmission shaft 22, and a position where the side meshing teeth 36 a mesh with the meshing teeth 25 a of the cylindrical shaft 25. In a state where the meshing teeth 36a of the transmission gear 36 are engaged with the meshing teeth 25a of the cylindrical shaft 25, the rotation of the cylindrical shaft 24 is transmitted to the cylindrical shaft 25 without being shifted, while the transmission gear 36 is engaged with the gear 37. Then, the planting power is changed according to the gear ratio. Thereby, a two-stage shift by the second inter-company transmission mechanism 35 and a three-stage transmission by the first inter-company transmission mechanism 30 are combined to enable six-stage inter-stock adjustment.

  The gear 37 is integrally provided with an eccentric gear 39 constituting a planting inconstant speed conversion mechanism 38. The eccentric gear 39 is always meshed with an eccentric gear 40 provided integrally with the cylindrical shaft 25. That is, when the gears 36 and 37 of the second inter-strain transmission mechanism 35 are engaged with each other, the power of the cylindrical shaft 24 is transmitted to the cylindrical shaft 25 via the planting inconstant speed conversion mechanism 38. This makes it possible not only to switch the planting power at a constant speed / unequal, but also to perform a constant speed / unequal switching using the transmission gear 36 of the second inter-stock transmission mechanism 35. In addition, since the first inter-strain transmission mechanism 30 and the second inter-strain transmission mechanism 35 are disposed on the transmission upstream side of the planting inconstant speed conversion mechanism 38, the speed change operation mechanism The inconvenience of shifting the acceleration position is also avoided.

  The cylindrical shaft 25 transmits planting power from the lower end of the transmission to the planting PTO shaft 9 via bevel gears B1 and B2. The bevel gear B <b> 2 on the planting PTO shaft 9 side is rotatably provided on the planting PTO shaft 9 and is connected to the planting 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 transmission downstream side of the planting unequal speed conversion mechanism 38, planting inequality There is no deviation in the speed increasing position of the speed conversion mechanism 38.

  Further, the transmission case 3 slidably supports a first shifter shaft 42 for shifting the first stock shift mechanism 30 and a second shifter shaft 43 for shifting the second stock shift mechanism 35. ing. A shifter fork 44 that engages with the transmission gear 33 is provided at the inner end of the first shifter shaft 42, and a first inter-strain shift lever 45 is linked to the outer end. The operating position of the first stock shift lever 45 is defined by the first detent mechanism 46, and the above-described three-stage stock shift is possible.

  A shifter fork 47 that engages with the transmission gear 36 is provided at the inner end of the second shifter shaft 43, and a second inter-group transmission lever 48 is linked to the outer end. The operation position of the second stock shift lever 48 is defined by the second detent mechanism 49, and the above-described two-step stock shift is possible. As described above, the second inter-shaft transmission mechanism 35 performs the constant speed / inconstant speed conversion together with the inter-shaft shift. This is also used as a switching operation tool.

As described above, assuming that K1 <K2 <K3 <K4 <K5 <K6, the six stages of stocks (K1 to K6) that can be adjusted by the combination of the first stock transmission mechanism 30 and the second stock transmission mechanism 35 are as follows. Appears when the first stock shift lever 45 and the second stock shift lever are operated to the following positions.
K1: 1st stock shift lever (small), 2nd stock shift lever (small)
K2: First stock shift lever (middle), second stock shift lever (small)
K3: Shift lever between the first stock (large), shift lever between the second stock (small)
K4: First stock shift lever (small), second stock shift lever (large)
K5: First stock shift lever (middle), second stock shift lever (large)
K6: First stock shift lever (large), second stock shift lever (large)
Therefore, when the strain is between K4 and K6, the planting power becomes unequal.

  Next, the lateral feed mechanism 50 of the seedling stage 13 will be described with reference to FIGS. As shown in these drawings, the planting work unit 11 is provided with a drive case 52 for inputting planting power from the planting PTO shaft 9. The drive case 52 decelerates the input planting power (2: 1) by the bevel gear mechanism 52 a and transmits it to the distribution shaft 51. The planting power transmitted to the distribution shaft 51 is transmitted to the planting mechanism 15 via the planting transmission case 14 and also transmitted to the lateral feed mechanism 50 via the lateral feed case 53. That is, the lateral feed case 53 is branched from the planting power transmission path on the downstream side of the planting inconstant speed conversion mechanism 38 and constitutes a lateral feed power transmission path for transmitting power to the lateral feed mechanism 50. .

  The lateral feed mechanism 50 includes a lateral feed shaft 54 that is pivotally supported in the left-right direction, and a guide piece 55 that is slidably fitted to the lateral feed shaft 54. The transverse feed shaft 54 is a screw shaft having a spiral groove 54 a (a right-handed spiral groove and a left-handed spiral groove continuously connected at both ends) on the outer periphery, and is a transverse feed power transmitted from the transverse feed case 53. Rotated in one direction. The guide piece 55 engages with the spiral groove 54 a of the lateral feed shaft 54 and is connected to the back surface of the seedling table 13. The guide piece 55, whose rotation is restricted by the connection with the seedling table 13, slides in the left-right reciprocating direction according to the rotation of the lateral feed shaft 54, and the seedling table 13 is laterally fed.

  The lateral feed case 53 pivotally supports one end side of the lateral feed shaft 54 and pivotally supports both ends of the input shaft 56 and the intermediate shaft 57. The input shaft 56 transmits the power input from the distribution shaft 51 to the intermediate shaft 57 via the lateral feed non-uniform speed conversion mechanism 58, and the intermediate shaft 57 transmits the power transmitted from the input shaft 56 to the lateral feed. It is transmitted to the lateral feed shaft 54 via the speed change mechanism 59. The lateral feed transmission mechanism 59 is provided integrally with a plurality of drive-side transmission gears 60 to 63 that are rotatably provided on the intermediate shaft 57 and one end side of the lateral feed shaft 54, and is respectively connected to the drive-side transmission gears 60 to 63. A plurality of meshing driven side transmission gears 64 to 67, a shifter 68 for selectively connecting any one of the drive side transmission gears 60 to 63 to the intermediate shaft 57, a lateral feed transmission operation shaft 69 for operating the shifter 68, And a detent mechanism 70 that holds the feed speed change operation shaft 69 at each speed change position. When the lateral feed power is shifted by the lateral feed speed change mechanism 59, the relative operating speed of the planting mechanism 15 and the lateral feed mechanism 50 changes, and the amount of seedling scraping (number of seedlings scraping) by the planting mechanism 15 is changed. The

  The lateral feed unequal speed conversion mechanism 58 is configured by using a pair of elliptical gears 58a, and shifts the lateral feed power to an unequal speed. As shown in FIG. 10A, the speed increasing region and the speed reducing region generated by the lateral feed unequal speed converting mechanism 58 are the speed increasing region and the speed reducing region generated by the planting unequal speed converting mechanism 38, respectively. When the planting power is converted to an inconstant speed by the planting unequal speed converting mechanism 38, the speed change by the planting unequal speed converting mechanism 38 is a lateral feed unequal speed converting mechanism. The power is canceled by 58 and the constant speed power is transmitted to the lateral feed mechanism 50.

  Next, operations of the planting unequal speed conversion mechanism 38 and the lateral feed unequal speed conversion mechanism 58 will be described in detail with reference to FIG. As shown in FIG. 10A, the planting inconstant speed conversion mechanism 38 is configured using the eccentric gears 39 and 40 as described above, and increases during one rotation of planting power. Generate speed range and deceleration range once. Thereafter, the planting power is decelerated to 2: 1 by the bevel gear mechanism 52a, and the speed increasing region and the speed decreasing region are generated twice during one rotation of the rotating case 17. The two speed increasing regions correspond to the seedling scraping position and the seedling planting position of the planting claw 19.

  On the other hand, as described above, the transverse feed non-uniform speed conversion mechanism 58 is configured using the elliptical gear 58a, and generates a speed increasing area and a speed reducing area twice during one rotation of the lateral feed power. . Since the non-uniform speed conversion mechanism 58 for lateral feed is provided on the transmission downstream side of the bevel gear mechanism 52a, the speed change of the planting power is canceled out by setting the acceleration / deceleration area to the opposite phase, and so on. Fast power can be supplied.

  (B) of FIG. 10 shows a state where the strain is set to K4 to K6. In this state, the planting power is converted at a non-uniform speed by the planting non-uniform speed conversion mechanism 38, but the lateral feed power transmitted to the horizontal feed mechanism 50 is converted by the horizontal feed non-uniform speed conversion mechanism 58. The reverse conversion is performed and the speed is constant. Thereby, generation | occurrence | production of the vibration resulting from the torque fluctuation of transverse feed power can be suppressed, and the stability of the planting operation part 11 can be improved. In addition, the lateral feed unequal speed conversion mechanism 58 converts the lateral feed power at an unequal speed so that the lateral feed operation speed of the seedling stage 13 is reduced when the planting mechanism 15 scrapes the seedling. The amount of lateral movement of the seedling is relatively small with respect to the amount of seedling scraping movement of the attaching mechanism 15, and the scraping performance of the seedling is improved.

  (C) of FIG. 10 shows a state in which the strain is set to K1 to K3. In this state, the planting power is not converted by the planting unequal speed conversion mechanism 38, so that the lateral feed power transmitted to the lateral feed mechanism 50 is the lateral feed unequal speed conversion mechanism 58. Is converted to unequal speed. In this case, the effect of suppressing the occurrence of vibrations due to torque fluctuations cannot be obtained, but the lateral feed non-uniform speed conversion mechanism 58 is arranged so that when the planting mechanism 15 scrapes off the seedling, Since the lateral feed power is converted at an infinite speed so that the feed operation speed becomes slow, the lateral movement amount of the seedling with respect to the seedling removal movement amount of the planting mechanism 15 is further reduced, and the scraping performance of the seedling is further improved. An effect is obtained.

  As shown in FIG. 11, the planting work part 11 of this embodiment is provided with the horizontal control mechanism 71 which corrects the right-and-left inclination automatically. The horizontal control mechanism 71 is supported by a rolling support shaft 72 of the planting work unit 11 so as to be able to swing left and right, and an intermediate frame 73 that holds the planting work unit 11 through a pair of left and right springs (not shown). A forcible tilt mechanism 74 that is interposed between the intermediate frame 73 and the lifting link mechanism 10 and forcibly swings the intermediate frame 73 left and right; and a tilt sensor 75 that detects the left and right tilt of the planting work unit 11. The tilt control of the intermediate frame 73 is performed so that the detection angle of the tilt sensor 75 is horizontal. In the planting work unit 11 configured as described above, if vibration due to torque fluctuation occurs, the accuracy of horizontal control is lowered, and there is a risk of lowering the planting accuracy. By doing, the effect that a planting precision improves is acquired.

  The transplanting machine according to the present embodiment configured as described above includes a seedling mounting base 13 for mounting seedlings, a planting mechanism 15 for scraping seedlings from the seedling mounting base 13 and transplanting them to a farm field, and a seedling mounting base 13. A horizontal feed mechanism 50 for laterally feeding, a planting power transmission path for transmitting power to the planting mechanism 15, and a planting provided in the planting power transmission path for causing a change in the operating speed of the planting mechanism 15 And a lateral feed power transmission path that branches off from the planting power transmission path downstream of the planting non-constant speed conversion mechanism 38 and transmits power to the lateral feed mechanism 50. In addition, since the lateral feed unequal speed conversion mechanism 58 for canceling the change in the operation speed by the planting unequal speed conversion mechanism 38 is provided in the lateral feed power transmission path, the planting unequal speed conversion mechanism 38 is provided with It is possible to convert the inconstant speed power that has passed through to constant speed power and transmit it to the lateral feed mechanism 50. It becomes ability. Thereby, generation | occurrence | production of the vibration by torque fluctuation can be suppressed and the stability of the planting operation part 11 can be improved.

  Further, the planting unequal speed conversion mechanism 38 converts the planting power at an unequal speed so that the seedling scraping speed of the planting mechanism 15 is increased, and the lateral feed unequal speed conversion mechanism 58 is planted. When the mechanism 15 scrapes off the seedling, the lateral feed power is converted at a non-uniform speed so that the lateral feed operation speed of the seedling mount 13 becomes slow. The amount of lateral movement is relatively small, and the seedling scraping performance can be improved.

It is a side view of a riding rice transplanter. It is a top view same as the above. It is a side view which shows an engine and a mission case. It is an expanded view of a mission case. It is an expanded view which shows a planting power transmission system. It is an expanded view which shows an inter-stock transmission mechanism and an inconstant speed conversion mechanism. It is an expanded view which shows the operation system of the 2nd stock transmission mechanism. It is an expanded view which shows the transmission structure of a planting operation part. It is a principal part expanded view which shows the transmission structure of a planting operation part. (A)-(C) are operation | movement explanatory drawings of the inconstant speed conversion mechanism for planting, and the inconstant speed conversion mechanism for side feed. It is a side view of a horizontal control mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Mission case 11 Planting work part 13 Seedling stand 15 Planting mechanism 38 Planting inconstant speed conversion mechanism 50 Transverse feed mechanism 53 Transverse feed case 58 Transverse feed inconstant speed conversion mechanism

Claims (2)

  A seedling stage for placing seedlings, a planting mechanism for scraping seedlings from the seedling stage and transplanting the seedlings to a field, a lateral feed mechanism for laterally feeding the seedling stage, and power transmission to the planting mechanism A planting power transmission path, a planting unequal speed conversion mechanism that is provided in the planting power transmission path and causes a change in the operating speed of the planting mechanism, and a planting unequal speed conversion mechanism In a transplanter including a transverse feed power transmission path that is branched from the planting power transmission path on the downstream side and transmits power to the transverse feed mechanism. A transplanter provided with a transverse feed non-uniform speed conversion mechanism for canceling a change in operation speed due to the conversion mechanism.   The planting unequal speed conversion mechanism converts planting power at an unequal speed so that a seedling scraping speed of the planting mechanism is increased, and the lateral feed unequal speed conversion mechanism is the planting mechanism. 2. The transplanter according to claim 1, wherein when the seedling is scraped off, the lateral feeding power is converted at an unequal speed so that the lateral feeding speed of the seedling stage is reduced.

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