JP2017046619A - Combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desired combine-harvester, in which a rotation sensor hardly receives the influences of vibrations of a hydraulic stepless speed variator.SOLUTION: A combine-harvester comprises: a vertically movable mowing part for mowing and transporting the crop at a farm field to the back of the harvester body; a mowing HST for the mowing part thereby to speed-change the rotation power from an engine and to transmit the power to the mowing part; a mowing input shaft 19 of the airframe transverse direction, which is mounted on the vertical base end part of the mowing part and for receiving the rotation power outputted from the mowing HST; a drive case 43 for supporting the mowing input axis 19; and a rotation sensor 87 for measuring the rotation number of the rotation power outputted from the mowing HST, wherein the rotation sensor 87 is supported by the drive case 43.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an up and down cutting unit that cuts crops in the field and conveys them to the rear of the machine, a hydraulic continuously variable transmission for a cutting unit that shifts rotational power from the engine and transmits the rotational power to the cutting unit, The present invention relates to a combine provided with a cutting input shaft that is provided at an elevating base end portion and to which the rotational power output from a hydraulic continuously variable transmission device is input.

  As such a combine, for example, a combine described in Patent Document 1 is already known. In the combine described in Patent Document 1, in order to control the cutting speed and the conveying speed of the cutting unit, the rotational speed of the rotational power input to the cutting input shaft from the hydraulic continuously variable transmission (“HST for cutting” in the literature). Is measured by a rotation sensor. This rotation sensor is supported by the case of the hydraulic continuously variable transmission.

JP 2014-113111 A

  In the combine described in Patent Document 1, since the rotation sensor is supported by the case of the hydraulic continuously variable transmission, a measurement error occurs or the rotation sensor is damaged due to the influence of the hydraulic continuously variable transmission that is a vibration source. There is a concern that inconveniences such as

  In view of the above situation, there is a demand for a combine in which the rotation sensor is not easily affected by the vibration of the hydraulic continuously variable transmission for the cutting part.

The feature of the present invention is that
A mowing part that can move up and down to harvest crops in the field and transport them to the rear of the aircraft,
A hydraulic continuously variable transmission for the reaping section that shifts and transmits rotational power from the engine to the reaping section;
A cutting input shaft that is provided at the lifting base end of the cutting unit and that receives the rotational power output from the hydraulic continuously variable transmission and that receives the rotational power.
A support case for supporting the cutting input shaft;
A rotation sensor for measuring the rotational speed of the rotational power output from the hydraulic continuously variable transmission,
The rotation sensor is supported by the support case.

  According to this characteristic configuration, since the rotation sensor is supported by the support case different from the hydraulic continuously variable transmission, the rotation sensor is not easily affected by the vibration of the hydraulic continuously variable transmission. As a result, there is no inconvenience such as a measurement error or damage to the rotation sensor due to the influence of the hydraulic continuously variable transmission as a vibration source. Further, by using the support case as a support member of the rotation sensor, it is not necessary to provide a support member dedicated to the rotation sensor.

Furthermore, in the present invention,
A rotation shaft provided in parallel to the support case in a state adjacent to the cutting input shaft, and a rotation shaft provided between the cutting input shaft and the rotating shaft to increase the rotational power of the cutting input shaft. A gear speed increasing mechanism for transmitting to the rotating shaft,
The rotation sensor preferably measures the number of rotations of the gear on the rotating shaft side of the gear speed increasing mechanism.

  According to this characteristic configuration, the rotation shaft rotates at a higher speed than the cutting input shaft, and the rotation speed of the gear on the rotation shaft side of the gear speed increasing mechanism is measured by the rotation sensor. Thereby, the number of rotation pulses increases, and the resolution of measurement can be improved.

Furthermore, in the present invention,
The gear speed increasing mechanism includes a driving gear provided on the cutting input shaft, a driven gear provided on the rotating shaft and meshing with the driving gear and having a smaller diameter than the driving gear, and the driven gear on the rotating shaft. And a measurement gear having a diameter larger than that of the driven gear.
The rotation sensor preferably measures the number of rotations of the measurement gear.

  According to this characteristic configuration, the driven gear having a smaller diameter than the drive gear meshes with the drive gear, the rotation shaft rotates at a higher speed than the cutting input shaft, and the rotation speed of the measurement gear having a larger diameter than the driven gear rotates. It is measured by a sensor. As a result, the number of rotation pulses can be further increased, and the measurement resolution can be further improved.

Furthermore, in the present invention,
The rotary input to which the rotational power from the hydraulic continuously variable transmission is input to the harvesting input shaft, and the rotational power input to the harvesting input shaft are output to a transport device that transports the harvested crop in the harvesting unit. And an output rotator to be provided,
It is preferable that the gear speed increasing mechanism is located between the input rotating body and the output rotating body.

  According to this characteristic configuration, the gear speed increasing mechanism can be arranged in a compact manner using the space between the input rotator and the output rotator.

Furthermore, in the present invention,
An output that is provided in the support case in a state parallel to the cutting input shaft, and that receives rotational power from the output rotating body and outputs rotational power input from the output rotating body to the transport device. A shaft is provided,
The cutting input shaft and the rotation shaft are preferably located on the same circumference centered on the output shaft in the axial direction of the cutting input shaft.

  According to this feature configuration, the arrangement of the cutting input shaft, the rotation shaft, and the output shaft becomes a substantially isosceles triangle having the output shaft as a vertex, and the cutting input shaft, the rotation shaft, and the output shaft can be arranged in a compact manner. it can.

It is a left view which shows the whole combine. It is a left view which shows the front part of a combine. It is a top view which shows the state which located the cutting part in the working position. It is a front fragmentary sectional view which shows the support structure of a cutting part. It is a top view which shows the state which located the cutting part in the maintenance position. It is front sectional drawing which shows a right bearing part. It is right side sectional drawing which shows a right bearing part. It is left side sectional drawing which shows the support structure of a supply conveyance apparatus and a drive case. It is a figure which shows the power transmission path | route of a combine. It is a perspective view which shows the support structure of a drive case. It is sectional drawing which shows the internal structure of a drive case. It is a left side sectional view showing a drive case. It is a left view which shows the state which attached the rotation sensor which concerns on another embodiment to the cutting HST. It is a perspective view which shows the state which attached the rotation sensor which concerns on another embodiment to the cutting HST. It is an expansion left view which shows the state which attached the rotation sensor which concerns on another embodiment to the cutting HST.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated based on drawing. In the following description, the direction of the arrow F shown in FIGS. 1 and 3 is “front side”, the direction of arrow B is “rear side”, the direction of arrow L shown in FIG. The direction of R is the “airframe right side”.

[Overall configuration of self-removing combine]
FIG. 1 shows a self-removing combine. The combine is provided with a body frame 1 and a pair of left and right crawler traveling devices 2 that support the traveling body so as to be able to travel on its own. At the front part of the machine body frame 1, there is provided a reaping part 3 that can cut and raise cereal grains in the field and convey it to the rear of the machine body. An operation cabin 4 is provided behind the cutting unit 3.

  An engine 5 is provided below the operation cabin 4. A mission case 6 is provided between the pair of left and right crawler traveling devices 2.

  Behind the driving cabin 4, a threshing device 7 for threshing the harvested cereal and a Glen tank 8 for storing the grain are provided adjacent to each other in the left-right direction of the machine body. On the left side of the threshing device 7, a feed chain 9 for conveying the harvested cereal meal to the threshing device 7 is provided.

  The threshing device 7 is configured to thresh the harvested cereals conveyed to the feed chain 9 by the handling cylinder 10 and to sort the threshing processed product by the sorting unit 11. The grain tank 8 is provided with an unloader 12 that discharges the grains in the grain tank 8.

[Mowing section]
As shown in FIG. 2 to FIG. 4, the reaping unit 3 cuts a plurality of (for example, six in the present embodiment) pulling devices 13 that cause the culm in the field, and the culm caused by the pulling device 13. Hair clipper-type harvesting device 14, transport device 15 for transporting the harvested cereal meal backward, supply transport device 16 for feeding and transporting the harvested cereal meal from the transport device 15 to the feed chain 9 (in the “conveyance device” according to the present invention) Equivalent).

  The cutting unit 3 is configured to be able to move up and down by swinging around an axis X1 facing the left and right of the machine body. The harvesting unit 3 includes a harvesting input case 17 facing left and right of the machine body, and a harvesting main frame 18 extending forward and downward from the harvesting input case 17. Inside the reaping input case 17, there is provided a reaping input shaft 19 facing left and right of the machine body. A cutting power transmission shaft 20 facing forward and downward is provided inside the cutting main frame 18.

  The cutting input case 17 is supported by the left bearing portion 21 and the right bearing portion 22 so as to be rotatable around the axis X1. A hydraulic cylinder 23 is provided across the cutting main frame 18 and the body frame 1. An end portion of the hydraulic cylinder 23 on the side of the cutting main frame 18 is connected to the cutting main frame 18 so that the connection can be released. By operating the hydraulic cylinder 23 to expand and contract, the cutting main frame 18 swings around the axis X1 integrally with the cutting input case 17, and the cutting unit 3 moves up and down.

  Below the cutting input case 17, an oil tank 24 for storing hydraulic oil is provided. On the left side of the oil tank 24 is a hydraulic continuously variable transmission (hereinafter referred to as “cutting HST”) 25 for the cutting unit 3 that shifts and transmits the rotational power from the engine 5 to the cutting unit 3. This “hydraulic continuously variable transmission” is bolted. On the left side of the oil tank 24, a support frame 26 is provided that supports the cutting unit 3 so as to be swingable around a vertical axis Y1.

  The left bearing portion 21 is provided with a left holder 27 and a left retainer 28. The left holder 27 is rotatably supported by the support frame 26 via a support shaft 29. When the left retainer 28 is fixed to the left holder 27 by the bolt 30, the cutting input case 17 is held by the left bearing portion 21.

  The right bearing portion 22 is provided with a right holder 31 and a right retainer 32. The right holder 31 is supported by the oil tank 24 via a bracket 33. The right retainer 32 is configured such that its rear end is swingably supported by the right holder 31 and can be opened and closed. The right retainer 32 is fixed to the right holder 31 by the bolt 34, whereby the cutting input case 17 is held by the right bearing portion 22.

  The mowing unit 3 is configured to swing around the axis Y1 so that the position can be changed between a working position (see FIG. 3) and a maintenance position (see FIG. 5). Here, in order to swing the cutting part 3 from the working position to the maintenance position, the connection between the hydraulic cylinder 23 and the cutting main frame 18 is released, the bolt 34 is released and the right retainer 32 is opened. The holding of the right bearing portion 22 is released. Thereby, the cutting part 3 can be swung around the axis Y1 to change the position from the working position to the maintenance position.

  As shown in FIGS. 6 and 7, the right end portion of the cutting input case 17 is rotatably supported by the right bearing portion 22 via a bush 35. The bush 35 is fixed by a collar 36 and a retaining ring 37 in a state of being fitted on the right end portion of the cutting input case 17. An inner peripheral surface of the bush 35 is set as a sliding surface with the cutting input case 17. As the bush 35, for example, a dry bearing can be used. The replacement of the bush 35 can be easily performed by removing the collar 36 and the retaining ring 37 by releasing the holding of the right bearing portion 22 as described above. Further, if the length of the collar 36 (length in the left-right direction of the machine body) is shortened, another member can be attached to the portion of the cutting input case 17 corresponding to the gap between the collar 36 and the retaining ring 37. it can.

  A grease nipple 38 for injecting grease into the inside of the cutting input case 17 is provided in the right end portion of the cutting input case 17 on the inner side (right side portion) of the body side of the right bearing portion 22. The grease from the grease nipple 38 is supplied to the sliding surface of the bush 35 from between the inner peripheral surface of the cutting input case 17 and the outer peripheral surface of the cutting input shaft 19 through the grease hole 17a of the cutting input case 17. Will be.

[Supply conveying device]
As shown in FIG. 8, the supply transport device 16 includes a drive sprocket 39, a guide roller 40, a tension roller 41, a transport sprocket 39, a guide roller 40, and a transport chain 42 wound around the tension roller 41, Is provided. The drive sprocket 39 is configured such that the rotational power of the cutting input shaft 19 is transmitted via a drive case 43 (corresponding to a “support case” according to the present invention). The drive sprocket 39 is rotatably supported by the drive case 43 via a conveyance drive shaft 39a (corresponding to an “output shaft” according to the present invention). The tension roller 41 is configured to be urged rearward by a spring 44 to apply tension to the transport chain 42.

  The guide roller 40 and the tension roller 41 are supported by a support member 45. The support member 45 is fixed to the left side portion of the drive case 43 with a bolt 46. A guide rail 47 that guides the transport chain 42 is provided on the support member 45.

[Combine power transmission path]
As shown in FIG. 9, the rotational power of the output shaft 5 a of the engine 5 is transmitted to the transmission case 6 by the belt transmission mechanism 48. The mission case 6 is provided with a hydraulic continuously variable transmission (not shown). The rotational power transmitted to the transmission case 6 is shifted by the hydraulic continuously variable transmission or the like and transmitted to the pair of left and right crawler travel devices 2 via the pair of left and right axles 2a.

  The rotational power of the output shaft 5 a of the engine 5 is transmitted to the counter shaft 50 by the belt transmission mechanism 49. The counter shaft 50 is provided inside the transmission case 51 in the left-right direction of the machine body.

  The rotational power of the counter shaft 50 is transmitted to the transmission shaft 53 by the bevel gear 52. The transmission shaft 53 is provided in the longitudinal direction of the machine body. The rotational power of the transmission shaft 53 is transmitted to the handling cylinder 10 by the belt transmission mechanism 54.

  Further, the rotational power of the counter shaft 50 is branched and transmitted by the gear transmission mechanism 55 to the sorting unit 11 side and the cutting unit 3 side. The gear transmission mechanism 55 is provided with transmission gears 56, 57, 58, and 59 that are sequentially meshed in the front-rear direction. The transmission gears 56, 57, 58, and 59 are provided inside the transmission case 51. The rotational power of the transmission gear 58 is transmitted from the transmission shaft 60 to the sorting unit 11 by the belt transmission mechanism 61.

  Further, the rotational power of the transmission gear 59 is transmitted from the transmission shaft 62 to the input shaft 25a of the cutting HST 25 by the belt transmission mechanism 63. The belt transmission mechanism 63 includes an output pulley 64 on the transmission shaft 62 side, an input pulley 65 on the input shaft 25a side of the cutting HST 25, a transmission belt 66 wound around the output pulley 64 and the input pulley 65, and a transmission belt 66. And a tension mechanism 67 for applying tension to the lens.

  Then, the rotational power of the output shaft 25 b of the cutting HST 25 is transmitted to the cutting input shaft 19 by the belt transmission mechanism 68. The belt transmission mechanism 68 includes an output pulley 69 on the output shaft 25b side of the cutting HST 25, an input pulley 70 on the cutting input shaft 19 side (corresponding to an “input rotating body” according to the present invention), an output pulley 69, and an input pulley. A transmission belt 71 wound around 70 and a tension mechanism 72 that applies tension to the transmission belt 71 are provided.

  The rotational power of the cutting input shaft 19 is transmitted to the transport drive shaft 39a by the gear transmission mechanism 73. The gear transmission mechanism 73 includes a transmission gear 74 (corresponding to the “output rotating body” according to the present invention) on the cutting input shaft 19 side, and a transmission gear 75 on the conveyance drive shaft 39a side. The transmission gears 74 and 75 are provided inside the drive case 43.

  The rotational power of the cutting input shaft 19 is transmitted to the conveying device 15 by the bevel gear 76 and is transmitted from the cutting transmission shaft 20 to the pulling device 13 and the cutting device 14 by the bevel gear 77.

[Drive case]
As shown in FIGS. 4, 8, and 10, the drive case 43 is provided between the supply conveyance device 16 and the left bearing portion 21 in a tilted posture that is tilted about the axis X1. The drive case 43 is supported by the left bearing portion 21 via brackets 78 and 79. The drive case 43 is fixed to the brackets 78 and 79 with bolts 80. The brackets 78 and 79 are fixed to the left holder 27 together with the left retainer 28 by bolts 30.

  The drive case 43 (right boss portion 85) is rotatably inserted into the left end portion of the cutting input case 17. Thereby, even if the cutting part 3 moves up and down as described above, its operation is not hindered by the drive case 43. Further, if the fixing of the bolt 80 is released, the drive case 43 can be swung around the axis X1.

  As shown in FIG. 11, the drive case 43 is configured by connecting a left split case body 82 and a right split case body 83 with a connecting surface S by bolts. The drive case 43 is formed with a plurality of flange portions 84 (see FIG. 10) for connecting the left divided case body 82 and the right divided case body 83 with bolts. The drive case 43 is formed with a pair of left and right boss portions 85. The cutting input shaft 19 is rotatably supported by the pair of left and right boss portions 85 via a pair of left and right bearings 86. The cutting input shaft 19 protrudes leftward from the left boss portion 85, and an input pulley 70 is provided at the protruding portion. The drive case 43 is provided with a rotation sensor 87 for measuring the rotational speed of the rotational power output from the cutting HST 25 (the rotational speed of the measuring gear 97).

  A transport drive shaft 39 a is rotatably supported by the drive case 43 via a pair of left and right bearings 88. The conveyance drive shaft 39 a is provided in a state parallel to the cutting input shaft 19. The transport drive shaft 39 a receives the rotational power from the transmission gear 74 via the transmission gear 75 and outputs the rotational power input from the transmission gear 74 to the supply transport device 16. The conveyance drive shaft 39a protrudes leftward from the drive case 43, and a drive sprocket 39 is provided at the protruding portion.

  A guide roller 89 is rotatably supported by the drive case 43 via a support shaft 89a. The guide roller 89 is provided on the lower path of the transport chain 42 so as to come into contact with the outer peripheral portion of the transport chain 42 from the lower side with respect to the transport chain 42. The guide roller 89 is located behind the drive sprocket 39 on the laterally outer side (left side) of the drive case 43.

〔Axis of rotation〕
As shown in FIG. 11, a rotating shaft 90 facing left and right of the machine body is provided in the drive case 43 in parallel with the cutting input shaft 19. The rotation shaft 90 is rotatably supported at its left end portion by a left split case body 82 via a pair of left and right bearings 91. The pair of left and right bearings 91 are fixed by retaining rings 92 and 93. The rotating shaft 90 is cantilevered from the pair of left and right bearings 91 to the right side of the connecting surface S. A gear speed increasing mechanism 94 that increases the rotational power of the cutting input shaft 19 and transmits it to the rotating shaft 90 is provided between the cutting input shaft 19 and the rotating shaft 90.

  As shown in FIG. 12, the cutting input shaft 19 and the rotary shaft 90 are positioned on the same circumference R centered on the transport drive shaft 39a when viewed in the axial direction of the cutting input shaft 19 (viewed in the direction of the axis X1). doing. That is, the straight line L1 connecting the axis X2 of the conveyance drive shaft 39a and the axis X1 of the cutting input shaft 19, the straight line L2 connecting the axis X2 of the conveyance driving shaft 39a and the axis X3 of the rotary shaft 90, and the cutting A straight line L3 connecting the axis X1 of the input shaft 19 and the rotation shaft 90 forms a triangle (substantially isosceles triangle having the conveyance drive shaft 39a as a vertex) having substantially the same length of the straight line L1 and the straight line L2. .

  The reaping input shaft 19, the rotation shaft 90, and the transport drive shaft 39a are located in the order of the reaping input shaft 19, the rotation shaft 90, and the transport drive shaft 39a from the front side in the longitudinal direction of the machine body. That is, the rotating shaft 90 is located between the cutting input shaft 19 and the transport driving shaft 39a in the longitudinal direction of the machine body.

  The cutting input shaft 19, the rotation shaft 90, and the conveyance drive shaft 39a are positioned in the order of the conveyance driving shaft 39a, the cutting input shaft 19, and the rotation shaft 90 from the upper side in the vertical direction. That is, the rotation shaft 90 is located below the transport drive shaft 39 a and below the cutting input shaft 19.

[Gear speed increasing mechanism]
As shown in FIG. 11, the gear speed increasing mechanism 94 is located closer to the transmission gear 74 side between the transmission gear 74 and the input pulley 70. That is, the gear speed increasing mechanism 94 is located on the inner side (right side) of the machine body with respect to the supply conveyance device 16. The gear speed increasing mechanism 94 is provided with a drive gear 95 and a driven gear 96 that mesh with each other, and a measurement gear 97.

  The drive gear 95 is provided on the cutting input shaft 19 on the left side of the transmission gear 74. The transmission gear 74 and the drive gear 95 are sandwiched and fixed from the left and right sides by a pair of left and right collars 98.

  The driven gear 96 and the measurement gear 97 are provided adjacent to each other on the rotary shaft 90 so that the measurement gear 97 is located on the left side and the right-side driven gear 96 is positioned. The driven gear 96 and the measurement gear 97 are fixed to the rotating shaft 90 by a flat washer 99, a spring washer 100, and a nut 101. A collar 102 is fitted on a portion of the rotary shaft 90 between the driven gear 96 and the measurement gear 97.

  The driven gear 96 and the measurement gear 97 are accommodated in the accommodation chamber 103 in the drive case 43. The storage chamber 103 is formed in a portion between the adjacent flange portions 84 in the drive case 43.

  The driven gear 96 has a smaller diameter than the drive gear 95. The measurement gear 97 is provided on the rotary shaft 90 so as to be rotatable integrally with the driven gear 96. The measurement gear 97 has a larger diameter and a larger number of teeth than the driven gear 96.

[Rotation sensor]
As shown in FIGS. 11 and 12, the rotation sensor 87 is configured to measure the number of rotations of the measurement gear 97. The rotation sensor 87 is constituted by, for example, a non-contact pickup sensor. The rotation sensor 87 is provided in a state where the detection portion 87 a is exposed in the storage chamber 103 and faces the outer peripheral portion of the measurement gear 97. An interval suitable for detection is set between the tip of the detection portion 87 a and the outer peripheral portion of the measurement gear 97 in the rotation sensor 87.

  The rotation sensor 87 is located on the inner side (right side) of the machine body from the input pulley 70 and is disposed so as to overlap the input pulley 70 in a side view. In the longitudinal direction of the machine body, the existence range of the rotation sensor 87 overlaps with the existence ranges of the measurement gear 97 and the conveyance drive shaft 39a. The rotation sensor 87 is positioned on the lower rear side of the measurement gear 97 and is supported by the left divided case body 82 in a state in which the detection unit 87a is in a forwardly inclined posture. The left split case body 82 is formed with a boss-like support portion 82A for inserting and supporting the rotation sensor 87.

  82 A of support parts are formed in the part corresponding to the storage chamber 103 among the left division | segmentation case bodies 82. As shown in FIG. 82 A of support parts are formed so that the axial center Z1 may pass along the axial center X3 of the rotating shaft 90 in the side view. A flange portion 82a for attaching the rotation sensor 87 is formed on the support portion 82A. In the state where the detection portion 87a of the rotation sensor 87 is inserted and supported by the support portion 82A, the mounting portion 87b of the rotation sensor 87 is fixed to the flange portion 82a of the support portion 82A by the bolt 104.

[Another embodiment]
(1) As shown in FIGS. 13 to 15, the rotation sensor 87 is attached to the cutting HST 25 via the attachment bracket 105. A measurement gear 108 is provided on the output shaft 25b of the cutting HST 25. The rotation sensor 87 is configured to measure the rotation speed of the measurement gear 108.

  The mounting bracket 105 is bolted to the rear side portion of the HST case 25A of the cutting HST25. The mounting bracket 105 includes a first mounting plate 106 that is long in the vertical direction and is attached to the HST case 25 </ b> A, and a second mounting plate 107 to which the rotation sensor 87 is mounted.

  The upper part of the first mounting plate 106 is bolted to the HST case 25 </ b> A of the cutting HST 25. A second mounting plate body 107 is connected to the lower portion of the first mounting plate body 106 via a vibration isolating rubber 109 (for example, two in this embodiment). The anti-vibration rubber 109 is provided with a pair of insert bolts 110 protruding in opposite directions. One of the pair of insert bolts 110 is fixed to the first mounting plate body 106 with a nut 111, and the other of the pair of insert bolts 110 is fixed to the second mounting plate body 107 with a nut 111.

  According to such a configuration, the vibration of the cutting HST 25 is reduced by the anti-vibration rubber 109 and is not easily transmitted to the rotation sensor 87. Thereby, the rotation sensor 87 is hardly affected by the vibration of the cutting HST 25, and the HST case 25A of the cutting HST 25 can be used as a support member of the rotation sensor 87.

(2) In the above embodiment, the rotation sensor 87 is configured to measure the rotation speed of the measurement gear 97, but the present invention is not limited to this. For example, the rotation sensor 87 may be configured to measure the number of rotations of the driven gear 96 without providing the measurement gear 97, or the rotation sensor 87 may be configured to transmit the transmission gear without providing the gear speed increasing mechanism 94. You may comprise so that the rotation speed of 74 may be measured. Further, a gear different from the transmission gear 74 and having a larger diameter and a larger number of teeth than the transmission gear 74 is provided on the cutting input shaft 19 so that the rotation sensor 87 measures the number of rotations of the gear. It may be configured. As a result, the rotation sensor 87 can be provided at a desired location on the drive case 43 while improving the measurement resolution. That is, the measurement target of the rotation sensor 87 is not particularly limited as long as the rotation sensor 87 is configured to measure the rotational speed of the rotational power output from the cutting HST 25.

(3) In the above-described embodiment, the gear speed increasing mechanism 94 is located closer to the transmission gear 74 between the transmission gear 74 and the input pulley 70, but is located closer to the input pulley 70. Alternatively, it may be located between the transmission gear 74 and the input pulley 70. In addition, the gear speed increasing mechanism 94 may be located on the outer side (left side) of the fuselage with respect to the input pulley 70, or may be located on the inner side (right side) of the fuselage with respect to the transmission gear 74.

(4) In the above embodiment, the cutting input shaft 19 and the rotary shaft 90 are on the same circumference R centered on the transport drive shaft 39a when viewed in the axial direction of the cutting input shaft 19 (viewed in the direction of the axis X1). However, the present invention is not limited to this. For example, the rotation shaft 90 may be located inside the circumference passing through the cutting input shaft 19 around the conveyance drive shaft 39a, or the rotation shaft 90 may be located outside the circumference. May be.

(5) In the above embodiment, the rotation sensor 87 is configured by a non-contact pickup sensor, but may be configured by, for example, an eddy current sensor.

  The present invention can be used for ordinary combine as well as self-removing combine.

3 Cutting part 5 Engine 16 Supply conveyance device (conveyance device)
19 Cutting input shaft 25 Cutting HST (hydraulic continuously variable transmission)
39a Transport drive shaft (output shaft)
43 Drive case (support case)
70 Input pulley (input rotating body)
74 Transmission gear (output rotating body)
87 Rotation sensor 90 Rotating shaft 94 Gear speed increasing mechanism 95 Drive gear 96 Driven gear 97 Measuring gear R Circumference

Claims (5)

A mowing part that can move up and down to harvest crops in the field and transport them to the rear of the aircraft,
A hydraulic continuously variable transmission for the reaping section that shifts and transmits rotational power from the engine to the reaping section;
A cutting input shaft that is provided at the lifting base end of the cutting unit and that receives the rotational power output from the hydraulic continuously variable transmission and that receives the rotational power.
A support case for supporting the cutting input shaft;
A rotation sensor for measuring the rotational speed of the rotational power output from the hydraulic continuously variable transmission,
The rotation sensor is a combine supported by the support case. A rotation shaft provided in parallel to the support case in a state adjacent to the cutting input shaft, and a rotation shaft provided between the cutting input shaft and the rotating shaft to increase the rotational power of the cutting input shaft. A gear speed increasing mechanism for transmitting to the rotating shaft,
The combine according to claim 1, wherein the rotation sensor measures the number of rotations of the gear on the rotating shaft side of the gear speed increasing mechanism. The gear speed increasing mechanism includes a driving gear provided on the cutting input shaft, a driven gear provided on the rotating shaft and meshing with the driving gear and having a smaller diameter than the driving gear, and the driven gear on the rotating shaft. And a measurement gear having a diameter larger than that of the driven gear.
The combine according to claim 2, wherein the rotation sensor measures the number of rotations of the measurement gear. The rotary input to which the rotational power from the hydraulic continuously variable transmission is input to the harvesting input shaft, and the rotational power input to the harvesting input shaft are output to a transport device that transports the harvested crop in the harvesting unit. And an output rotator to be provided,
The combine according to claim 2 or 3, wherein the gear speed increasing mechanism is located between the input rotator and the output rotator. An output that is provided in the support case in a state parallel to the cutting input shaft, and that receives rotational power from the output rotating body and outputs rotational power input from the output rotating body to the transport device. A shaft is provided,
The combine according to claim 4, wherein the harvesting input shaft and the rotation shaft are located on the same circumference centered on the output shaft when viewed in the axial direction of the harvesting input shaft.

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