JP2007074901A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester capable of making centerline error in a belt pulley and a tension arm as small as possible, excellent in driving stability and capable of efficiently carrying out assembly operation, etc., accompanying the production and maintenance. <P>SOLUTION: In the combine harvester, the transmission mechanism 100 is equipped with an output pulley 101 pivoted and rotated on a threshing cylinder spindle 22b of a threshing cylinder 22, a transmission belt 102 wound around the output pulley 101, an input pulley 103 driven through the transmission belt 102 and a tension arm 104 in which the rotating base end is coaxially pivoted with the output pulley 101 on the threshing cylinder spindle 22b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combine provided with a transmission mechanism provided with a threshing section for threshing cereal grains.

  In the conventional combine, a cutting part for reaping cereals planted in the field is arranged at the front end of the machine frame, and a threshing part for threshing the cereals is arranged behind the cutting part. Has been. This threshing part is provided with a substantially cylindrical handling cylinder that is rotationally driven via a motor part such as an engine, and from the tip of the cereal cocoon inserted by the movement of the protruding part planted on the outer periphery of the cylindrical surface Grains are handled and stored in a receiving net provided at the bottom of the barrel. The rotational power of the power drive unit such as the handling cylinder is transmitted by a transmission mechanism including a pulley or the like, and simultaneously drives other power drive units such as a grain processing unit and a conveyance processing unit for processing the processed product. ing.

In relation to a combine equipped with such a transmission mechanism, for example, the following techniques are disclosed.
In Patent Document 1, a conveyance beater shaft of a conveyance beater is connected to a cutting countershaft for driving a cutting unit to an output shaft of an engine, and a conveyance conveyor shaft that drives a conveyance conveyor is linked to the conveyance beater shaft, There has been proposed a power transmission structure of a combine transport unit that transmits power by a transmission belt between a transport beater shaft and a transport conveyor shaft.

Patent Document 2 discloses a threshing system power transmission path interposed between a threshing device and a prime mover unit mounted on a body frame, and a sorting system power transmission that transmits power to a sorting unit provided at a lower portion of the threshing device. A sorting system countershaft is interposed between the screen and the sorting system countershaft. The sorting system countershaft is arranged in a substantially orthogonal state on the threshing system power transmission path and the sorting system power transmission path, respectively, for repair and maintenance. A threshing drive structure that can be easily performed is described.
JP 2002-58320 A JP 2000-157037 A

However, the conventional combine described in the patent document has the following problems.
In the power transmission structure of the combine described in Patent Documents 1 and 2, the driving force transmitted by the transmission belt is adjusted by pressing the tension roller provided at the tip of the tension arm against the transmission belt interposed between the pulleys. The And the rotation fulcrum of such a tension arm is fixedly positioned and attached to the body frame side or its drive shaft. For this reason, the belt line of the transmission belt may shift depending on the component accuracy and assembly accuracy in the manufacture of the transmission mechanism, leading to a decrease in the belt life due to misalignment, and precise positioning is required for assembly work associated with the manufacture and maintenance. Therefore, there is a problem that production efficiency and work efficiency are lowered.

  The present invention has been made to solve the above-described problems, and can reduce the center line error between the pulley and the tension arm in the transmission mechanism as much as possible, has excellent driving stability, and assembly work associated with its manufacture and maintenance. An object of the present invention is to provide a combine equipped with a transmission mechanism that can efficiently perform the above.

(1) A combine according to the present invention that solves the above-described conventional problems is configured such that a handling cylinder is rotatably mounted in a handling chamber of a threshing part via a handling cylinder support shaft, and one side end portion of the handling cylinder support shaft is provided. In a combine that is linked to the prime mover while the other end of the handle spindle is linked to another power drive via a transmission mechanism, the transmission mechanism is connected to the other end of the handle spindle. While attaching the output pulley, attach the input pulley to the other power drive unit, wind the transmission belt between both pulleys, and make the tip of the tension arm approachable / separable via the tension roller via the transmission belt The base end portion of the tension arm is attached to the handling cylinder support shaft coaxially with the output pulley.

(2) In the combine according to the present invention, in the above (1), a boss portion is extended from the central side wall of the output pulley along the outer peripheral surface of the barrel support shaft, and the tension arm is attached to the outer peripheral surface of the boss portion. Another feature is that the base end is pivotally mounted.

  According to the present invention, the tip end portion of the tension arm can be moved close to and away from the transmission belt wound between the output pulley and the input pulley via the tension roller, and the base end portion of the tension arm is the handling cylinder support shaft. The center line error in each pulley and tension arm can be reduced, and there is little vibration and excellent drive stability. It is possible to provide a combine equipped with a transmission mechanism that can efficiently perform assembly work and the like.

  The combine of the present embodiment is configured such that the handling cylinder is rotatably mounted in the handling chamber of the threshing part via the handling cylinder support shaft, and one end of the handling cylinder support shaft is interlocked and connected to the prime mover part. In a combine in which the other end of the support shaft is linked to another power drive unit via a transmission mechanism, the transmission mechanism attaches an output pulley to the other end of the support shaft while the other power An input pulley is attached to the drive unit, a transmission belt is wound between both pulleys, and the tip end portion of the tension arm can be moved to and away from the transmission belt via a tension roller. It is configured to be mounted on the barrel support shaft coaxially with the output pulley. This makes it possible to efficiently perform operations such as attachment and removal of each member during assembly and maintenance. In addition, since the center line error between both pulleys and the tension arm is reduced, vibration during driving is suppressed and deterioration of the transmission belt is prevented, which is excellent in terms of cost and driving stability.

  The threshing unit is a device in which a substantially cylindrical handling chamber is formed at a position immediately after the conveying unit such as a feed chain for conveying the cereal harvested by the cutting unit in front of the machine frame to the threshing unit on the machine frame. . Inside this chamber, a cylindrical barrel is rotatably disposed via a prime mover such as an engine, and a receiving net is disposed immediately below the barrel. The cereals conveyed by the conveying unit are threshed while being moved by the protrusions provided on the outer periphery of the handling cylinder, and the grains pass through the receiving net and move to the lower swing sorting unit. On the other hand, the threshing grains after threshing are moved to the rear rejection processing section. In this conveying apparatus, the stocker side of the harvested culm is pinched by the feed chain fixedly arranged opposite to the traveling feed chain and the feed chain. The part which is opposed to is used as a conveyance path through which the cereals are conveyed. And while constraining the stock side of the cereal at the threshing part on the machine frame, the tip side of the cereal is inserted below the handling cylinder, and threshing is performed by rotation of the handling cylinder, and the grain from the receiving net And swarf are leaking.

  The output pulley is pivotally supported on a rotating shaft of a handling cylinder that is rotationally driven via a prime mover. A boss portion is extended from the central side wall of the output pulley along the outer peripheral surface of the handling cylinder support shaft, and a base end portion serving as a rotation shaft of the tension arm is pivotally attached to the outer peripheral surface of the boss portion. . Thus, the transmission belt is wound around a depression formed on the circumference of the pulley, and the rotational power is transmitted by the frictional force.

  The transmission belt is a flexible belt member formed endlessly by a rubber material, a synthetic resin material, a metal material, or a composite material thereof.

  The input pulley is a pulley having a diameter having a predetermined ratio with respect to the diameter of the output pulley and having a recess on which a transmission belt is mounted on a circumference thereof. It is connected and power from the output pulley can be transmitted and supplied as necessary.

  The tension arm rotates around a support shaft within a predetermined angle range, and a tension roller is provided at the tip of the tension arm. By rotating the tension arm in this way, the tension roller can move toward and away from the transmission belt, so that the transmission belt can be pressed to apply tension or release tension. It has become. This tension force is adjusted with a wire or the like locked to the tension arm, and input from the output pulley by adjusting the friction force between each pulley and the transmission belt so that a predetermined tension force is applied to the transmission belt. The power transmitted to the pulley can be controlled and the on / off state can be switched.

  In the combine of this embodiment, a boss portion is extended from the central side wall of the output pulley along the outer peripheral surface of the barrel support shaft, and the base end portion of the tension arm is pivotally supported on the outer peripheral surface of the boss portion. It can also be attached. Thereby, positioning of each member can be performed more easily and efficiently, and it is possible to provide a combine that is excellent in maintainability and productivity, and excellent in durability and reliability.

  The boss portion is a member fitted to a base end portion extending from the handling cylinder support shaft. Thus, the base end portion of the tension arm is pivotally attached to the outer peripheral surface of the boss portion extending from the central side wall of the output pulley along the outer peripheral surface of the barrel support shaft. Note that the rotation shaft of the output pulley and the rotation shaft of the tension arm can be pivotally supported in an integrated manner via the boss portion.

  Next, the combine which concerns on embodiment of this invention is demonstrated more concretely, referring drawings. 1 is an overall left side view of a combine according to an embodiment of the present invention, FIG. 2 is an overall plan view, FIG. 3 is an overall right side view, and FIG. 4 is a schematic left side view of a threshing unit and a sorting unit. 5 is a detailed front view of the threshing unit, FIG. 6 is a front view of the power drive mechanism of the threshing unit, FIG. 7 is a side view of the same, and FIG. 8 is a schematic diagram showing the power transmission path of the combine.

  First, the whole structure of the combine which concerns on embodiment of this invention is demonstrated with reference to FIGS. A machine frame 2 is placed on the combine 1 according to the present embodiment, and a cutting unit 3 having a function of raising the cereal is disposed at the front end of the machine frame 2 so as to be movable up and down. The cutting part 3 projects the weed plate 4 at its front end to weed the cereals, raises the case 5 at the rear part thereof, raises the case 5 and causes the cereal by rotating the tine 6 protruding from the case 5. The stock is cut with a cutting blade 7 disposed at the rear of the weed plate 4.

  The harvested wheat straw is conveyed to the rear by the upper conveying device, the lower conveying device, and the vertical conveying device 8, and the stock side is inherited by the feed chain 9 of the wheat straw conveying device 170 from the upper end of the vertical conveying device 8, The cereals are conveyed into the threshing apparatus including the threshing unit 20 and the sorting unit 30 via the handling cylinder supply start end 280.

  A supply guide 250 is provided on the upstream side of the feed chain 9 to which the cereals are supplied so that the supply guide 250 can be opened and closed, and the operator rotates the supply guide 250 upward to remove the cereals left in the field. It can be supplied to the threshing unit 20 by being introduced into the opening.

  A waste transporting device 320 including a waste transporting chain 10 is disposed at the rear end of the feed chain 9, and a waste disposal process including a waste cutter device 321 and a diffusion conveyor is provided below the rear of the waste transporting chain 10. The part 11 is formed, and after the waste is cut into pieces, it is uniformly released to the field while being diffused or released without being cut.

  The threshing unit 20 side part is provided with a Glen tank 13 for storing the refined grains after sorting, and the front part of the Glen tank 13 is provided with a driving part 14 covering the control part. That is, the driving unit 14 is disposed on the right front side of the aircraft in the traveling direction. On the other hand, a vertical auger 15a of the discharge auger 15 is erected at the rear part of the Glen tank 13 so that the discharge auger 15 and the Glen tank 13 can be turned sideways around the vertical auger 15a. By rotating, the maintenance of the drive system and the hydraulic system arranged inside the machine is facilitated.

  A discharge conveyor 16 is disposed in the front-rear direction at the bottom of the Glen tank 13, and the rear portion of the discharge conveyor 16 communicates with the lower portion of the vertical auger 15a, and power is transmitted from the rear portion of the discharge conveyor 16 to the discharge auger 15. Thus, the grain in the grain tank 13 can be discharged from the tip of the discharge auger 15 to a truck or the like. Further, a sorting unit 30 is disposed below the threshing unit 20, and the grain is sorted from the grains and sawdust flowing down from the threshing unit 20, and the refined grains are conveyed to the Glen tank 13 or sawdust. Etc. are discharged to the outside of the apparatus and conveyed to the Glen tank 13.

  Next, the threshing part 20 and its peripheral structure will be described with reference to FIGS. The handling chamber 21 formed in the threshing unit 20 is provided with a substantially cylindrical handling cylinder 22 that is pivoted in the front-rear direction of the machine body. On the outer peripheral surface of the handling cylinder 22, tooth handling 22a, 22a,. Has been planted. A semicircular receiving net 23 is detachably provided so as to cover the lower periphery of the handling cylinder 22. On the other hand, the feed chain 9 constrains the stock side of the grain straw, while the tip side of the grain straw is inserted below the handling cylinder 22 and the grain straw is conveyed to the rear of the machine body. At this time, threshing is performed by rotation of the barrel 22 so that grains, sawdust and the like leak from the receiving net 23.

  A dust feed valve 24 is provided on the inner peripheral surface of the chamber cover 21a that covers the chamber 21 at an appropriate interval in the left-right width direction, and is pivotally supported around a pivot point in the vertical direction. Yes. Then, by rotating the dust supply valve 24, it is possible to adjust the time for the cereal to move in the handling chamber 21 in accordance with the varieties of the cereal and the state of the cereal.

  A processing chamber 25 is formed at the rear side of the rear side of the handling cylinder 22 (the Glen tank 13 side, in this embodiment, the right side in the machine body traveling direction), and a dust feed port configured in a substantially cylindrical shape in the processing chamber 25. The processing cylinder 26 is horizontally and axially supported in the front-rear direction on the side of the rear portion of the processing cylinder 22 so that the processing cylinder 26 is parallel to the processing cylinder 22. Further, the rear (right) side surface of the handling cylinder case that covers the handling cylinder 22 and forms the handling chamber 21, and the front part (left) of the processing cylinder case that covers the dust-feed port processing cylinder 26 and forms the processing chamber 25. A dust feed port 27 is opened on the side surface, and the handling chamber 21 and the processing chamber 25 are communicated with each other. A semicircular processing cylinder network 28 is provided so as to cover the lower periphery of the dust supply processing cylinder 26. In this way, unprocessed materials such as shoots adhering grains that could not be processed by the handling cylinder 22 are transferred to the processing chamber 25 through the dust delivery port 27 and processed, and the holes (mesh) provided in the processing cylinder network 28 are processed. Only the processed material leaks through.

  In addition, a blade body 26a made of a long plate body is fixed on the outer peripheral surface of the rear end portion of the dust supply port processing cylinder 26. The wing body 26a rotates integrally with the dust outlet processing cylinder 26, and the sawdust conveyed to the rear of the processing chamber 25 by the dust outlet processing cylinder 26 is splashed off by the rotation of the wing body 26a. It is discharged below the dust-feed port processing cylinder 26 and guided outside the machine body by a guide plate (not shown).

  Below the processing cylinder 28, a dust feeding / conveying conveyor 29 is pivoted in the front-rear direction. The dust feeding conveyor 29 is a screw type conveyor, and the processed material that has dropped downward through the holes (mesh) provided in the processing cylinder network 28 by the dust feeding conveyor 29 is forward of the machine body (that is, , In the direction opposite to the conveying direction of the dust feeding port processing cylinder 26), and is reintroduced into the sorting unit 30 through the dust discharging port 29 a provided at the front end of the dust feeding and conveying conveyor 29.

  An outlet partition plate 52 is disposed behind the barrel 22, and a sieving device 120 is disposed below the outlet partition plate 52 and above the extension line of the barrel receiving net 23. Cutting is prevented.

  The sieving device 120 is disposed between the handling cylinder 22 and the suction fan 40 in a side view, on the side of the dust-feed port processing cylinder 26 and above the swing sorting apparatus 31 including the chaff sheave 38. . The sieving device 120 is located immediately behind the lower rear end of the handling cylinder 22 and is located where the sorted air that has passed through the air path below the handling cylinder 22 exits a wider air path. .

  Further, as shown in FIG. 4, the first conveyor 41 and the second conveyor 42 are laterally arranged in the left-right direction at the front-rear halfway position below the swing sorting device 31. The positional relationship between the first conveyor 41 and the second conveyor 42 is such that the first conveyor 41 is closer to the tang 32 (front part of the machine frame 33) and the second conveyor 42 is farther from the tang 32 (rear part of the machine frame 33). )

  The right end of the first conveyor 41 is connected to a whipping conveyor 44 provided such that its longitudinal direction (conveying direction) is substantially vertical, and the upper end of the whipping conveyor 44 communicates with the inside of the glen tank 13. ing.

  As shown in FIGS. 5 to 7, the transmission mechanism 100 in the threshing portion 20 of the combine 1 includes an output pulley 101 that is rotated via a boss portion 22 c to a base end portion where a handling cylinder support shaft 22 b of the handling cylinder 22 is extended. A transmission belt 102 wound around the output pulley 101, an input pulley 103 driven via the transmission belt 102, and a rotating shaft thereof at a base end portion of the handling cylinder support shaft 22 via a boss portion 22 c. Tension arm 104 disposed coaxially.

The handling cylinder support shaft 22b of the handling cylinder 22 is rotatably supported by a partition plate shaft portion 22d provided on the outlet partition plate 52 behind the handling chamber 21. The barrel support shaft 22b is driven via the combine 1 engine, and a boss portion 22c is detachably fitted and fixed to the other-side base end portion.
A boss portion 22c is extended and attached so as to extend along the outer peripheral surface of the barrel support shaft 22b from the central side wall of the output pulley 101, and the proximal end portion of the tension arm 104 rotated on the outer peripheral surface of the boss portion 22c. Is pivotally supported. Thus, the output pulley 101 and the tension arm 104 are pivotally supported via the boss portion 22c, so that the output pulley 101 and the tension arm 104 can be rotated and rotated coaxially with the handling cylinder support shaft 22b and can be attached and detached integrally. It is like that.

A tension roller 104a is provided at the tip of the tension arm 104 that is rotated about the handling cylinder support shaft 22b. By rotating the tension arm 104 in one direction, the tension roller 104a approaches, abuts against and presses the transmission belt 102 wound between the output pulley 101 and the input pulley 103, and a predetermined tension force is applied. It is applied to the transmission belt 102. As a result, the rotational power of the handling cylinder 22 driven via a prime mover such as the engine 60 passes through the output pulley 101 → the transmission belt 102 → the input pulley 103 to another power drive unit such as a waste transporting device. Is transmitted to a pulley 105 for driving the motor.
Further, by rotating the tension arm 104 in the reverse direction, the tension roller 104a is separated from the transmission belt 102 and the tension of the transmission belt 102 is released. As a result, the transmission of the rotational power of the barrel 22 to the input pulley 103 via the output pulley 101 is stopped.

  As shown in FIG. 7, a wire locking portion 104 b and a spring locking portion 104 c are provided in the vicinity of the left and right sides of the tension arm 104. As shown in the figure, the other end of the wire 104d whose base end is connected to the threshing portion cover 20a that can be opened and closed is locked to the wire locking portion 104b. The tension arm 104 is supported via a rotation fulcrum provided on the support member 106 constituting the outlet partition plate 52, and the tension arm 104 is moved at a predetermined angle in conjunction with the opening / closing operation of the threshing portion cover (handle barrel cover) 20a. Can be rotated.

  Even when the spring 104e is locked to the spring locking portion 104c of the tension arm 104 and no tension is applied to the wire 104d, the tension roller 104a at the tip of the tension arm 104 is in contact with the transmission belt 102. A predetermined pressing force is applied. By opening the threshing portion cover 20a in this way, the tension roller 104a moves away from the transmission belt 102, the tension of the pressed transmission belt 102 is released, and the power from the output pulley 101 to the input pulley 103 is released. Transmission is interrupted.

The input pulley 103 driven by the output pulley 101 is connected to a pulley 105 connected to another power drive unit such as the rejection processing unit 11 via a transmission belt 102a, and power transmission is controlled via a tension arm 107. Is done.
The tension arm 107 is a member that is formed in a substantially V shape as a whole, and is arranged so that the rotation shaft provided at the V-shaped bent portion coincides with the rotation shaft of the input pulley 103. A tension roller 107a is provided at one end of the V-shape, and a rotation action point 107b for rotating the tension arm 107 is provided at the other end. The rotation action point 107b is connected to the evacuation cover 108 via a spring member 107c and a link 107d, and the tension arm 107 is rotated in conjunction with the opening / closing operation of the evacuation cover 108. Thus, by opening the waste cover 108 provided in the waste processing section 11, the tension roller 107a of the tension arm 107 is moved away from the transmission belt 102a. As a result, the tension applied to the transmission belt 102a via the spring member 107c is released, the power transmission from the input pulley 103 to the pulley 105 is controlled from on to off, and the drive system of the evacuation processing unit 11 is controlled. I try to stop it.

Next, the power transmission path in the combine 1 will be described with reference to FIG.
A front output shaft 60 a of the engine 60 is connected to an input shaft of a traveling mission case 61 for driving the combine 1, and transmits driving force to the combine 1. On the other hand, a pulley 62 for transmitting driving force to the threshing unit 20 and the sorting unit 30 and a pulley 63 for transmitting driving force to the glen tank 13 and the discharge auger 15 are fitted on the rear output shaft 60b. ing. The pulley 62 is connected to a pulley 109 fixed to an input shaft 108a protruding from the counter case 108 via a V-belt 110, and a part of the driving force of the engine 60 is transmitted to the input shaft 108a of the counter case 108. I try to do it. In this way, the power from the engine 60 is transmitted to each processing system via the counter case 108, and the handling cylinder 22, the kite 32, the first conveyor 41, the feed chain 9, the conveying device of the cutting unit 3, the cutting blade 7, and the like are driven. It is possible. The counter case 108 can distribute an appropriate speed to each processing system, and is disposed on the left side of the engine 60 and in front of the threshing unit 20 as shown in FIG.

  The front surface of the bottom of the Glen tank 13 is located substantially behind the engine 60, and a drive case 64 serving as a drive unit is disposed on the front wall surface of the bottom of the Glen tank 13. The drive case input shaft 65 protrudes forward from the drive case 64 and a pulley 66 is fitted to the front end of the drive case input shaft 65.

  A V-belt 67 is wound around a pulley 63 fitted to the rear end of the rear output shaft 60b and a pulley 66 fitted to the front end of the drive case input shaft 65, and a part of the driving force of the engine 60 is driven to the drive case. 64 input shafts 65 are transmitted.

  An auger clutch 68 that also serves as a tension pulley for the V-belt 67 is provided between the pulley 63 and the pulley 66 so that the driving force can be transmitted to and cut off from the driving case 64 to the downstream side.

  Spur gears 69a and 69b meshing with each other are housed in the drive case 64. The spur gear 69a is externally fixed to the rear end of the input shaft 65 supported by the drive case 64, and the spur gear 69b is discharged. It is externally fitted and fixed to a conveyor drive shaft 70 which is a rotating shaft fitted to the front end of the conveyor 16.

  A bevel gear 71 is fitted at the rear end of the discharge conveyor 16 and meshes with a bevel gear 73 fitted at the lower end of a screw-type vertical feed conveyor 72 in the vertical auger 15a. On the other hand, a bevel gear 74 is fitted on the upper end of the longitudinal conveying conveyor 72. The bevel gear 75 meshes with the bevel gear 74, an intermediate case 76 in which a chain and a sprocket are installed, and then the bevel gears 77 and 78 inside the grain discharge auger 15. The screw type transverse feed conveyor 79 is driven to rotate.

A part of the driving force of the engine 60 is transmitted to the input shaft 108a of the counter case 108 that can distribute engine power to each processing system, and the handling cylinder 22, the tang 32, the first conveyor 41, the feed chain 9, The conveying device, the cutting blade 7 and the like of the cutting unit 3 can be driven.
As shown in FIG. 8, the handling cylinder support shaft 22 b of the handling cylinder 22 is rotationally driven via a driving pulley 108 b attached to the input shaft 108 a of the counter case 108.
Then, the rotational power of the handling cylinder 22 is transmitted to the output pulley 101 of the transmission mechanism 100 fitted through the boss 22c to the base end portion extended to the distal end side of the handling cylinder support shaft 22b. Drive to rotate.

The transmission belt 102 wound around the output pulley 101 rotating in this way travels, and power is transmitted to the input pulley 103 provided on the other end side. The input pulley 103 is configured to function as a drive source for other power drive units such as the Karatsu 32, the first conveyor 41, the feed chain 9, and the cutting unit 3.
The rotating shaft of the transmission belt 102 wound between the output pulley 101 and the input pulley 103 is brought into contact with and pressed by a tension roller 104a of a tension arm 104 pivotally supported via a boss portion 22c. Therefore, the wire locking portion 104b provided on the arm portion of the tension arm 104 is pulled to control the pressing force, thereby adjusting the power transmitted from the output pulley 101 to the input pulley 103 within a predetermined range. Or turn it on and off.

As described above, the tension arm 104 of the transmission mechanism 100 has its pivot fulcrum disposed coaxially with the barrel support shaft 22b and the output pulley 101. As a result, the belt line is less likely to be displaced due to component accuracy and assembly accuracy during installation and maintenance, thereby improving workability and handling.
Further, since the output pulley 101 and the tension arm 104 are attached to the handling cylinder support shaft 22b via the boss portion 22c, the attachment of the pulley can be adjusted to an arbitrary position (according to the belt line) in the axial center line direction.

Further, it is possible to correct the deviation of the belt line due to variations in the accuracy of parts assembly, thereby preventing the life of the transmission belt 102 from being shortened due to the deviation of the core and suppressing noise during operation.
Since the rotation fulcrum of the tension arm is installed on the output pulley 101, the center line of the tension roller 104a can be easily adjusted to the belt line together with the output pulley 101, so that the number of assembling steps can be reduced. In addition, the error of the center line of the pulley and the tension pulley can be reduced as much as possible, and the efficiency of the maintenance work can be improved.

  As described above, the gist of the present invention is that the rotation shaft of the tension arm for pressing the transmission belt interposed between the output pulley and the input pulley is arranged coaxially with the handling cylinder support shaft. This is the scope of the right of the present invention. For example, in this embodiment, in order to adjust the rotation angle of the tension arm 104, the tension arm 104 having the tension roller 104a is supported via the spring 104e and the wire 104d. You may enable it to adjust the rotation angle of the tension arm 104 via actuators, such as an electric motor. Moreover, it is also possible to apply the power transmission mechanism of the combine of this invention to each power drive part irrespective of such a threshing part.

The left side view of the whole combine according to one embodiment of the present invention. Same overall plan view Same overall right side view Left side schematic diagram of threshing section and sorting section Detailed front view of threshing section Front view of power drive mechanism of threshing unit Same side view Schematic diagram showing the power transmission path of the combine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 20 Threshing part 20a Threshing part cover 21 Handling room 22 Handling cylinder 22a Handling tooth 22b Handling cylinder support shaft 22c Boss part 22d Partition plate shaft part 60 Engine (motor part)
DESCRIPTION OF SYMBOLS 100 Transmission mechanism 101 Output pulley 102 Transmission belt 103 Input pulley 104 Tension arm 104a Tension roller 104b Wire locking part 104c Spring locking part 104d Wire 104e Spring 105 Pulley 106 Support member 107 Tension arm 107a Tension roller 108 Exhaust cover

Claims (2)

A handling cylinder is rotatably mounted in the handling chamber of the threshing unit via a handling cylinder support shaft, and one end of the handling cylinder support shaft is linked to the motor unit while the other side of the handling cylinder support shaft is connected. In a combine where the end is linked and linked to another power drive via a transmission mechanism,
The transmission mechanism has an output pulley attached to the other end of the barrel support shaft, an input pulley attached to the other power drive unit, a transmission belt is wound between both pulleys, and a tension roller is attached to the transmission belt. The tension arm has a distal end that can be moved closer to and away from the tension arm, and the base end of the tension arm is attached to the barrel support shaft coaxially with the output pulley.   A boss is extended from the central side wall of the output pulley along the outer peripheral surface of the barrel support shaft, and the base end of the tension arm is pivotally attached to the outer peripheral surface of the boss. The combine according to claim 1.

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