JP2012170398A - Reaping portion structure of general purpose combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reaping portion of a general purpose combine harvester, which has a simplified arrangement constitution, has improved maintainability, and ensures good visibility in the right front direction during reaping works.SOLUTION: A reel transmission system 30 is composed of a belt type continuously variable transmission; the belt type continuously variable transmission is arranged at the right side rear portion of a right reel arm 53R; a reel-driving transmission system 32 is arranged at the right side front portion of the right reel arm 53R; the reel transmission system 30 and the reel-driving transmission system 32 arranged at the right side of the right reel arm 53R are covered with a reel arm cover 60; and the lateral width of the reel arm cover 60 is formed so that a front cover portion 60b covering the reel-driving transmission system 32 is thinner than a rear cover portion 60a covering the reel transmission system 30.

Description

  The present invention relates to a harvesting part structure for a general-purpose combine provided with a reel that scrapes stems along with rotation in a harvesting part that trims stems in front of the fuselage.

  A general-purpose combine is known in which all the cut stems are put into a handling room and threshing and sorting are performed. This type of general-purpose combiner has a cutting part that cuts the stems in front of the fuselage, a divider that weeds the stems, a reel that scrapes the stems with rotation, and a cutting blade that cuts the stock of the stems And an auger that collects the cut stems and a feeder that sends the collected stems to the threshing section, and the rotation speed of the reel can be changed according to working conditions. For example, the general-purpose combine shown in Patent Documents 1 and 2 includes a belt-type continuously variable transmission (CVT) as a reel transmission transmission system that changes the rotational power of the reel, and the belt-type continuously variable transmission is shifted. Power is transmitted to the reel drive shaft via a reel drive transmission system comprising a chain transmission mechanism.

Japanese Patent No. 2688145 JP 2006-271240 A

  By the way, the reel is rotatably supported by a pair of left and right reel arms extending forward from the machine body side, and is rotated by power transmitted via the side surface portion of the right reel arm on the already-harvested side. However, in the general-purpose combine shown in Patent Documents 1 and 2, the reel speed change transmission system including the belt type continuously variable transmission is arranged in the space below the right reel arm where the cutting blade transmission system and the like are arranged. There was a problem that the composition became complicated and the maintainability deteriorated.

  Further, in the general-purpose combine shown in Patent Documents 1 and 2, the reel power transmission path from the base end portion to the tip end portion of the right reel arm is configured only by the reel drive transmission system composed of the chain transmission mechanism. In addition to requiring a long chain, the chain suspension path and chain tensioning mechanism become complicated, leading to a cost increase.

The present invention was created in order to solve these problems in view of the above circumstances, and is rotated around a reel drive shaft facing left and right as a fulcrum on a cutting part for cutting stems in front of the aircraft. And a reel that scrapes the stem with the rotation, a pair of left and right reel arms that extend forward from the machine body and rotatably support the reel between its front ends, and the rotational power of the reel is changed. In a general-purpose combine comprising a reel speed change transmission system and a reel drive power transmission system that transmits the power changed by the reel speed change transmission system to the reel drive shaft, the reel speed change transmission system is constituted by a belt type continuously variable transmission, A reel-type continuously variable transmission is arranged at the rear of the right side of the right reel arm, while a reel drive transmission system is arranged at the front of the right side of the right reel arm and is arranged on the right side of the right reel arm. In addition, the reel drive transmission system is covered with a reel arm cover, and the left and right widths of the reel arm cover are configured so that the cover front part covering the reel drive transmission system is thinner than the cover rear part covering the reel transmission transmission system. And
The reel speed reduction transmission system is arranged on the left side surface of the right reel arm when a reel speed reduction transmission system is provided to decelerate the power shifted by the reel speed change transmission system and transmit it to the reel drive transmission system. .

According to the first aspect of the present invention, since the reel speed change transmission system and the reel drive power transmission system are arranged on the right side surface of the right reel arm, the reel speed change transmission system is provided in the space below the right reel arm in which the cutting blade power transmission system and the like are configured. Compared to the arrangement, the arrangement configuration can be simplified and maintainability can be improved. In addition, since the transmission path of the reel drive transmission system can be shortened as compared with the prior art, the structure of the reel drive transmission system can be simplified and the cost can be reduced. In addition, since the front of the cover that covers the reel drive transmission system is made thinner than the rear part of the cover that covers the reel speed change transmission system, the left and right width of the reel arm cover is reduced. The line connecting the right end divider and the right end divider) can be reduced by the front cover portion of the reel arm cover, and a good right front view can be secured.
According to the second aspect of the present invention, when the reel speed reduction transmission system is provided to decelerate the power shifted by the reel speed change transmission system and transmit it to the reel drive transmission system, the reel speed reduction transmission system is provided on the left side surface of the right reel arm. Therefore, the right and left width of the reel arm cover is prevented from spreading outward to the right, and a good right front view can be obtained.

It is the whole general purpose combiner right side view. It is a whole left view of a general purpose combine. It is a whole top view of a general purpose combine. It is a right view of a cutting part. It is a top view of a cutting part. It is a transmission expansion view of a cutting part. It is a detailed transmission diagram of a cutting part, (A) is a plan view, (B) is a right side view. It is operation | movement explanatory drawing which shows the low speed transmission state of a belt-type continuously variable transmission, (A) is a plane sectional view, (B) is a right view. It is an operation explanatory view showing a high-speed gear shift state of a belt type continuously variable transmission, (A) is a plane sectional view, and (B) is a right side view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-3, 1 is a general purpose combine, Comprising: This general purpose combine 1 is the harvesting part 2 which cuts off the stem stalk in front of the body, and the threshing part which threshs and sorts the grain from the harvested stem stalk 3, a grain tank 4 for storing the selected grain, an operation unit 5 on which an operator gets on, and a crawler type traveling unit 6.

  As shown in FIGS. 4 and 5, the cutting unit 2 of the general-purpose combiner 1 includes a pair of left and right dividers 7L and 7R that weed the stems, a reel 8 that scrapes the stems with rotation, A cutting blade 9 that cuts the stock, an auger 10 that collects the cut stems, and a feeder 11 that sends the collected stems to the threshing unit 3 are provided. The reaping part 2 configured in this way is connected to the front part of the machine body so as to be pivotable up and down, and is used for hydraulic expansion and contraction of a reaping part lift cylinder 12 interposed between the front part of the machine body and the reaping part 2. It is adapted to be lifted accordingly.

  The operation unit 5 is configured at a right offset position (cutting ground side offset position) at the front of the machine body, and operation tools such as a main transmission lever 14 and a steering lever 15 are arranged around the driver seat 13. Yes. The operator gets on the operation unit 5 and operates the main shift lever 14 in the front-rear direction, so that the aircraft can move forward and backward and travel, and by operating the steering lever 15 in the left-right direction, You can steer the aircraft.

  At the time of cutting, it is necessary to steer the aircraft based on the right end of the uncut stem culm in order to prevent uncut stalks from being cut. That is, the operator visually recognizes the right end of the uncut stem and the position of the right divider 7R provided at the right end of the cutting unit 2 so that the right divider 7R passes on the right side of the right end of the uncut stem. Steer the aircraft. Therefore, it is preferable that the cutting unit 2 is configured to ensure a good right front view without blocking an operator's line of sight (line connecting the operator's eye position and the right divider 7R) during the cutting operation.

  An engine 16 is mounted below the operation unit 5. The generated power of the engine 16 is transmitted to the traveling transmission 18 via a traveling HST (hydraulic continuously variable transmission) 17 and transmitted to the threshing unit 3 via a threshing clutch 19, as shown in FIG. Furthermore, it is transmitted to the cutting part 2 via the cutting clutch 20.

  The power transmitted to the cutting unit 2 is input to the power distribution shaft 22 via the feeder drive shaft 21, and is distributed to the auger 10, the cutting blade 9 and the reel 8 from here. That is, an auger transmission system 24 composed of a chain transmission mechanism is formed between the power distribution shaft 22 and the auger drive shaft 23, and a belt transmission mechanism is formed between the power distribution shaft 22 and the cutting blade drive shaft 25. A cutting blade transmission system 26 is configured, and a reel transmission system 28 including a chain transmission mechanism is configured between the power distribution shaft 22 and the reel drive shaft 27.

  As shown in FIGS. 6 to 9, the reel transmission system 28 includes a reel distribution transmission system 29, a reel speed change transmission system 30, a reel deceleration transmission system 31 and a reel drive transmission system 32. The reel distribution transmission system 29 includes a chain transmission mechanism, and transmits the power of the power distribution shaft 22 to the input shaft 33 of the reel transmission transmission system 30. Specifically, a drive sprocket 34 provided integrally with the power distribution shaft 22, a driven sprocket 35 provided integrally with the input shaft 33, a chain 36 suspended between the sprockets 34, 35, a chain A reel distribution transmission system 29 is configured by including a tension roller 37 that applies tension to 36.

  The reel speed change transmission system 30 is a belt type continuously variable transmission, and continuously changes the power transmitted from the reel distribution transmission system 29 to the input shaft 33 and outputs it from the output shaft 38. Specifically, a pair of variable pitch pulleys 39, 40 whose pulley width (pitch diameter) changes based on the axial movement of the movable split pulleys 39b, 40b relative to the fixed split pulleys 39a, 40a, and the variable pitch pulleys 39, 40 Between the cam mechanisms 39c and 40c for changing the pulley width, the cam mechanisms 39c and 40c are connected to each other, and the connecting rod 41 for changing the pulley width of each of the variable pitch pulleys 39 and 40 contrarily, and the pair of variable pitch pulleys 39 and 40 The reel speed change transmission system 30 is configured to include a belt 42 suspended around the reel.

  The reel deceleration transmission system 31 includes a chain transmission mechanism, and decelerates the power output from the output shaft 38 of the reel speed change transmission system 30 and transmits it to the input shaft 43 of the reel drive transmission system 32. Specifically, a small-diameter drive sprocket 44 provided integrally with the output shaft 38, a large-diameter driven sprocket 45 provided integrally with the input shaft 43, and a chain suspended between the sprockets 44, 45. 46 and a tension roller 47 that applies tension to the chain 46, the reel deceleration transmission system 31 is configured.

  The reel drive transmission system 32 includes a chain transmission mechanism, and transmits power input from the reel deceleration transmission system 31 to the input shaft 43 to the reel drive shaft 27. Specifically, a drive sprocket 48 provided integrally with the input shaft 43, a driven sprocket 49 provided integrally with the reel drive shaft 27, a chain 50 suspended between the two sprockets 48, 49, a chain A reel drive transmission system 32 is configured including tension rollers 51 and 52 that apply tension to 50.

  Next, the support structure of the reel 8 and the arrangement configuration of the reel transmission system 28 will be described with reference to FIGS.

  As shown in these drawings, the cutting unit 2 includes a pair of left and right reel arms 53L and 53R that extend forward from the machine body and rotatably support the reel 8 between its front ends. The power is transmitted to the reel drive shaft 27 via the side surface portion of the right reel arm 53R on the already-cut ground side. As the reel arms 53L and 53R, frame-shaped and plate-shaped ones are known, but in this embodiment, the left reel arm 53L is configured in a frame shape, and the right reel arm 53R is configured in a plate shape. ing. The reel arms 53L and 53R are supported so as to be rotatable up and down with the rear end side as a fulcrum, and move up and down in accordance with the hydraulic expansion and contraction operation of a pair of left and right reel lift cylinders 54 interposed between the cutting unit main body. As a result, the height of the reel 8 is adjusted.

  In the cutting unit 2 according to the embodiment of the present invention, the reel speed change transmission system 30 including a belt type continuously variable transmission is used to transmit the power of the reel 8 to the reel drive shaft 27 via the right side surface portion of the right reel arm 53R. Is disposed at the rear side of the right side of the right reel arm 53R, while the reel drive transmission system 32 comprising a chain transmission mechanism is disposed at the front side of the right side of the right reel arm 53. This simplifies the arrangement of the right reel arm lower space and improves maintainability compared to the case where the reel speed change transmission system 30 is arranged in the right reel arm lower space where the cutting blade transmission system 26 and the like are configured. be able to. In addition, the reel drive transmission system 32 has a power transmission path from the base end portion to the front end portion of the right reel arm 53R, which is configured by only the reel drive transmission system 32 including a chain transmission mechanism. Since the path can be shortened, the structure of the reel drive transmission system 32 can be simplified and the cost can be reduced. The input shaft 33 of the reel transmission system 30 is preferably arranged on the same axis as the rotation fulcrum of the right reel arm 53R. In this way, it is possible to prevent the distance between the axes of the reel distribution transmission system 29 from fluctuating when the right reel arm 53R rotates up and down.

  Further, a shift drive motor 55 that drives the reel transmission transmission system 30 at a variable speed is also disposed at the rear of the right side surface of the right reel arm 53R. The speed change drive motor 55 is arranged at the rear side of the right side surface of the right reel arm 53R and at the lower part of the right side surface, and is connected to the drive side variable pitch pulley 39 via a connecting rod 56 that expands and contracts in response to the drive of the speed change drive motor 55. The cam mechanism 39c is connected. A pair of limit switches 58 and 58 are provided on the right reel arm 53 </ b> R, and the detection piece of the bracket 57 provided on the connecting rod 56 according to the drive of the speed change drive motor 55 is one of the pair of limit switches 58. Is turned on, so that the limit positions of the cam mechanisms 39c, 40c are detected.

  A mowing unit side cover 59 that covers the arrangement space of the cutting blade transmission system 26 and a reel arm cover 60 that covers the right side surface of the right reel arm 53R are attached to and detached from the right side surface of the mowing unit 2 as a transmission cover that covers the transmission system. Or it is provided so that opening and closing is possible. Here, the front part of the reel arm cover 60 may block an operator's line of sight (a line connecting the operator's eye position and the right divider 7R) during the cutting operation, and hinders securing a good right front view. There is a concern.

  Therefore, in the cutting unit 2 according to the embodiment of the present invention, when the reel transmission transmission system 30 and the reel drive transmission system 32 arranged on the right side surface of the right reel arm 53R are covered with the reel arm cover 60, the reel arm cover 60 The left-right width W2 of the cover front portion 60b covering the reel drive transmission system 32 is made thinner than the left-right width W1 of the cover rear portion 60a covering the reel transmission transmission system 30. In this way, it is possible to reduce the possibility that the operator's line of sight during the cutting operation is blocked by the cover front portion 60b of the reel arm cover 60, and to secure a good right front view.

  Further, in the cutting unit 2 according to the embodiment of the present invention, when the reel speed reduction transmission system 31 that decelerates the power shifted by the reel speed change transmission system 30 and transmits it to the reel drive transmission system 32 is provided. Is arranged on the left side surface of the right reel arm 53R. In this way, the right and left width of the reel arm cover 60 is prevented from spreading outward to the right, and a good right front view can be obtained. A cover 61 that covers the reel deceleration transmission system 31 is provided on the left side surface of the right reel arm 53R so as to be detachable or openable.

  According to the present embodiment configured as described, the reel 2 that rotates the reel driving shaft 27 facing left and right to the reaping portion 2 that cuts the pedicles in front of the fuselage and scrapes the pedicles along with the rotation. 8, a pair of left and right reel arms 53L, 53R that extend forward from the machine body and rotatably support the reel 8 between its front ends, and a reel speed change transmission system 30 that changes the rotational power of the reel 8. In the general-purpose combine 1 including a reel drive transmission system 32 that transmits the power changed by the reel transmission transmission system 30 to the reel drive shaft 27, the reel transmission transmission system 30 is configured by a belt type continuously variable transmission, and the belt type While the continuously variable transmission is disposed at the rear side of the right side surface of the right reel arm 53R, the reel drive transmission system 32 is disposed at the front side of the right side surface of the right reel arm 53R. Compared with the case of arranging the Ruamu reel speed change transmission system 30 to the lower space, a simplified arrangement, thereby improving the maintainability. In addition, since the transmission path of the reel drive transmission system 32 can be shortened as compared with the prior art, the structure of the reel drive transmission system 32 can be simplified and the cost can be reduced.

  Further, the reel transmission transmission system 30 and the reel drive transmission system 32 arranged on the right side surface of the right reel arm 53R are covered with a reel arm cover 60, and the left and right widths of the reel arm cover 60 are covered with the reel transmission transmission system 30. The cover front portion 60b that covers the reel drive transmission system 32 is made thinner than the rear portion 60a, so that the possibility that the operator's line of sight during the cutting operation is blocked by the cover front portion 60b of the reel arm cover 60 is reduced. A right front view can be secured.

  Further, when the reel speed reduction transmission system 31 is provided on the left side of the right reel arm 53R in providing the reel speed reduction transmission system 31 that decelerates the power shifted by the reel speed change transmission system 30 and transmits it to the reel drive transmission system 32. The right and left width of the reel arm cover 60 is prevented from spreading outward to the right, and a good right front view can be obtained.

DESCRIPTION OF SYMBOLS 1 General-purpose combine 2 Cutting part 3 Threshing part 5 Operation part 7 Divider 8 Reel 27 Reel drive shaft 28 Reel transmission system 29 Reel distribution transmission system 30 Reel transmission transmission system 31 Reel deceleration transmission system 32 Reel drive transmission system 53L Left reel arm 53R Right Reel arm 55 Variable speed drive motor 60 Reel arm cover 60a Cover rear part 60b Cover front part

Claims (2)

In the cutting part that cuts the stems in front of the aircraft,
A reel that rotates about a reel drive shaft facing left and right as a fulcrum, and scrapes the stem with the rotation,
A pair of left and right reel arms extending forward from the fuselage side and rotatably supporting the reel between its front ends,
A reel transmission system for shifting the rotational power of the reel;
In a general-purpose combine equipped with a reel drive transmission system that transmits the power changed by the reel transmission transmission system to the reel drive shaft,
The reel transmission system is composed of a belt-type continuously variable transmission, and the belt-type continuously variable transmission is arranged on the right side rear of the right reel arm, while the reel drive transmission system is arranged on the right side front of the right reel arm. The reel speed change transmission system and the reel drive transmission system arranged on the right side surface of the right reel arm are covered with a reel arm cover, and the left and right widths of the reel arm cover are A general-purpose combine harvester structure characterized in that the front part of the cover covering the drive transmission system is made thin.   The reel deceleration transmission system is disposed on the left side surface of the right reel arm when providing a reel deceleration transmission system that decelerates the power shifted by the reel transmission system and transmits it to the reel drive transmission system. The general-purpose combine harvester structure according to 1.

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