JP2006296441A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester solving the problems of grain culms causing conveying blockage at a confluent part of two or more flows of the reaped grain culms to prevent the smooth conveyance to a threshing part side and to reduce the conveying efficiency, that is threshing efficiency, also solving the problems wherein the damage or the like of the constituent members of an upper conveyance structure and a lower conveyance structure are caused at the position having the conveying blockage by a partial large load acting on the constituent members of the upper conveyance structure and the lower conveyance structure, and capable of efficiently removing the conveying blockage of the grain culms. <P>SOLUTION: A power-exchanging mechanism for exchanging the normal rotation/reverse rotation of the power for the reaping part 3 is installed between the output shaft of an engine 35 and the reaping part 3 in the combine harvester having the reaping part 3 for reaping the grain culms and conveying the reaped grain culms to the threshing part 4 side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combine structure. More specifically, the present invention relates to a switching mechanism for switching between normal rotation and reverse rotation of power in a power transmission mechanism to a harvesting unit of a combine.

Conventionally, as one form of a combine harvesting unit, a cutting blade device that raises a plurality of grains and harvests them while holding and conveying, and an upper conveyance mechanism that conveys the grains harvested by the cutting blade device to the threshing unit side It is equipped with a lower transfer mechanism and a vertical transfer mechanism, and at the rear of the upper transfer mechanism and the lower transfer mechanism, the harvested multiple grains are once merged at the merge section, and the merged grains are conveyed to the threshing section side. There is something to do. (For example, see Patent Document 1)
JP 2000-102311 A

  However, in the conventional combine, in the joining part of the multiple shed grains, the grains are clogged and are not smoothly conveyed to the threshing part, and the conveyance efficiency and further the threshing efficiency are reduced. was there. In addition, there is a problem in that a part of the upper transport mechanism / lower transport mechanism is partially subjected to a large load at the location where the transport jam occurs, causing damage to the upper transport mechanism / lower transport mechanism. there were. In addition, in order to remove cereals from a state where the cereals are clogged by the upper transport mechanism, the lower transporting mechanism, the vertical transporting mechanism, etc., the cereals cannot be removed unless they are pulled out or cut at the clogged part. It was necessary and time-consuming. Therefore, in the present invention, a combine that can efficiently remove the transport clog of the cereals is provided.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  In a combine having a harvesting unit that harvests cereal and conveys it to the threshing unit side, a power switching mechanism is provided between the engine output shaft and the harvesting unit to switch between normal rotation and reverse rotation of the power of the harvesting unit.

Since the present invention is configured as described above, the following effects can be obtained.
In a combine that has a harvesting unit that harvests cereal and transports it to the threshing unit, a power switching mechanism that switches between normal rotation and reverse rotation of the harvesting unit is provided between the engine output shaft and the harvesting unit. When clogging occurs, the clogging can be easily removed by reversing the power to the cutting unit.
In the conventional combine, there is a problem in that the cereal grains are clogged in the merging part of the plurality of harvested cereal grains and are not smoothly conveyed to the threshing part side, and the conveyance efficiency and further the threshing efficiency are reduced. It was.
In addition, there is a problem in that a part of the upper transport mechanism / lower transport mechanism is partially subjected to a large load at the location where the transport jam occurs, causing damage to the upper transport mechanism / lower transport mechanism. there were.
In addition, in order to remove cereals from a state where the cereals are clogged by the upper transport mechanism, the lower transport mechanism, the vertical transporting mechanism, etc. It was necessary and time-consuming.
Such a problem could be solved.

  Next, embodiments of the invention will be described. 1 is a side view showing the overall configuration of a combine according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view of a cutting unit, and FIG. 4 is a power transmission configuration of the first embodiment. FIG. 5 is a diagram showing the auxiliary transmission lever, FIG. 6 is a skeleton diagram showing the outline of the power transmission configuration of the second embodiment, FIG. 7 is a diagram showing the cutting clutch lever, and FIG. 8 is the third embodiment. FIG. 9 is a sectional view showing the bevel case, FIG. 10 is a skeleton diagram showing the outline of the power transmission configuration of the cutting part, FIG. 11 is a diagram showing a sprocket having a one-way unit, and FIG. It is a figure which shows a raising drive mechanism.

  First, the overall schematic configuration of the combine will be described. As shown in FIGS. 1 and 2, a pair of left and right crawler type traveling units 2, 2 are provided below the body frame 1, and a cutting part 3 is attached to the left front end of the body frame 1, immediately after the cutting part 3. A threshing unit 4 is provided at a position, and a sewage treatment unit 5 is provided immediately after the threshing unit 4, while a driving unit 6 is provided at the front right side of the machine body frame 1, and a grain is placed immediately after the driving unit 6. A grain storage tank 7 is provided. 8 is a feed chain provided on the left side of the threshing section 4.

  Next, the structure of the combine harvester 3 will be described. The configuration of the cutting frame 11 that supports each conveyance mechanism of the cutting unit 3 will be described. As shown in FIG. 3, a rotation base 12 is provided at the rear of the cutting frame 11, and the rotation base 12 is constituted by a cylindrical frame, and a pair of left and right supports 10 and 10 are set up on the front of the body frame 1. The rotary base 12 is pivotally supported between the upper ends thereof, and a cutting input shaft 72 (FIG. 10) is pivotally supported therein, and power from the engine 00 (FIG. 10) is input via a belt, a pulley, or the like. Has been.

  A vertical frame 13 is extended forward and downward from the right side of the pivot base 12 and is connected to a middle portion of a cylindrical lower horizontal frame 14 extending in the left-right horizontal direction at the lower end of the vertical frame 13. The cylindrical rising frame 15 is raised from the left end of the frame 14 toward the front upper side, and a support frame (not shown) is raised from the right end of the lower lateral frame 14 toward the front upper side to raise both the frames 15. An upper horizontal frame 16 is placed between the upper ends of the upper horizontal frame 16, a horizontal frame 17 is provided behind the upper horizontal frame 16 at the middle of the left and right sides. It is fixed in the middle.

  Further, a pair of left and right lower connection frames 18 and 18 are extended from the left and right side portions of the lower horizontal frame 14 toward the front. The cutting unit 3 configured as described above rotates about the rotation base 12 by the expansion and contraction of the piston rod 29 of the elevating cylinder 28 fixed to the vertical frame 13 of the cutting frame 11.

  Next, the power transmission mechanism will be described with reference to FIG. The engine 35 is provided with a crankshaft 51 for changing the reciprocating motion of a piston (not shown) into a rotational motion extending in the longitudinal direction of the machine body. The front end of the crankshaft 51 is used as an output shaft 82 and the output shaft 82 has a drive shaft with a universal joint. The rear end of 63 is fixed. An input shaft 78 is connected to the front end of the drive shaft 63 with a universal joint, and the input shaft 78 protrudes from an input case 79 provided on the transmission case 36.

  An HST case 118 that houses a hydrostatic continuously variable transmission (hereinafter referred to as “HST”) is provided on the left side surface of the input case 79. In the HST case 118, a turning HST 38, in order from the front, A rectilinear HST 37 is provided. From the rectilinear HST 37, a rectilinear drive shaft 81 connected to a rectilinear motor shaft 114, which is an output shaft of the rectilinear HST 37, projects from the left side and is transmitted to the input shaft 78. The generated rotational force is transmitted in the mission case 36 after being controlled in the forward / reverse rotational direction and the rotational speed increase / decrease in the straight traveling HST 37, and can also be output from the straight drive shaft 81.

  Further, on the left side of the engine 35, a counter case 64 capable of shifting to an appropriate speed to each processing system is disposed. From the counter case 64, input shafts 75, 76 and output shafts 91, 92, 93,. 94 is protruded. A vehicle speed tuning input pulley 66 is fixed to the vehicle speed tuning input shaft 75, and the vehicle speed tuning input pulley 66 is connected to a straight drive pulley 80 on the straight drive shaft 81 via a belt 61. Thus, the traveling rotation from the straight traveling HST 37 can be transmitted into the counter case 64.

  A direct input pulley 67 is fixed to the direct input shaft 76, and a pulley 65 on an output shaft 83 formed at the rear end of the crankshaft 51 is connected to the direct input pulley 67 via a belt 73. In addition, a threshing clutch 52 is provided on the belt 73. A pulley 68 is also fixed on the output shaft 83, and the pulley 68 is connected to and linked to a conveyor shaft 85a of a lower conveyor 85 that is mounted on the lower part of the grain storage tank 7 via a belt 69 or the like. Yes.

  The threshing output shaft 91 is connected to the input shaft of the handling cylinder 41 (FIG. 1) of the threshing unit 4 via the output pulley 95, the belt 103, and the like, and is a tension pulley (see FIG. (Not shown) enables connection / disconnection of power from the threshing output shaft 91 to the handling cylinder 41.

  An output pulley 97 is fixed to the sorting output shaft 93, and a pulley or the like is connected to the output pulley 97 via a belt 98 so that power can be output to each part of the sorting device 71. The output shaft 94 is coupled to the feed chain 8 so as to be interlocked.

  An output pulley 96 is fixed to the cutting output shaft 92, and the output pulley 96 is connected to and connected to the cutting input shaft 72 via an intermediate transmission mechanism 77 provided on the support column 10. Power can be input from 72 to the cutting unit 3.

  Next, a power switching mechanism that switches between normal rotation and reverse rotation of the power to the cutting unit 3 will be described. Since the power transmission to the conventional mowing unit 3 was only forward rotation, when the cereal was jammed in the mowing unit 3, the safety clutch was activated and it was not smoothly conveyed to the threshing unit side. The operation could not be resumed unless it was removed, and the removal work of the clog was very troublesome, and there was a problem that the conveyance efficiency and further the threshing efficiency were lowered. Therefore, in the present invention, in order to efficiently remove the clogged cereals, a forward / reverse switching mechanism for the power to the mowing unit 3 is provided so that the forward / reverse switching of the power can be switched. The power of rolling is transmitted to the cutting part, and when the grain clogs are transported, the power is reversed and transmitted to the cutting part 3.

First, a first embodiment of the power switching mechanism will be described.
The power switching mechanism of the first embodiment is disposed in a gear-type transmission unit disposed between the output of the engine 35 and the cutting input shaft 72 of the cutting unit 3, that is, in the counter case 64. As shown in FIG. 4, the power of the cutting output shaft 92 is input to the counter case 64 from the vehicle speed tuning input shaft 75 and the direct input shaft 76 and is transmitted through the cutting transmission shaft 122. A gear 123 and a reverse gear 124 are fixed to the cutting transmission shaft 122. On the other hand, a slide gear 121 is slidably fixed to the cutting output shaft 92 in the counter case 64.

  When the slide gear 121 and the gear 123 mesh with each other, power in the forward rotation direction is transmitted to the cutting output shaft 92. When the slide gear 121 is slid and meshed with the intermediate gear 129 meshed with the reverse gear 124, power in the reverse direction is transmitted to the cutting output shaft 92. Further, when the slide gear 121 meshes with the intermediate gear 129 and the reverse rotation power is transmitted to the cutting part, it is configured to decelerate by the reverse rotation gear 124 and the intermediate gear 129, and is necessary for removing the cereals and the like at the time of the reverse rotation. High torque can be taken out, and clogging can be removed slowly.

  The slide gear 121 is slid by a sub-transmission lever 125 provided in the operation unit 6. As shown in FIG. 5, the auxiliary transmission lever 125 is configured to be slidable along the lever guide 126. The lever guide 126 includes a travel guide groove 126b that is slidable in the front-rear direction so as to perform speed changes such as travel, standard, neutral, and overturn, and slides from the neutral position to the side (right side in this embodiment). The movable cutting reverse rotation groove 126a is formed in a substantially T shape in a plan view. A guide 127 is disposed below the lever guide 126. The guide 127 is interlocked and connected to the slide gear 121 via a wire 128, and slides the slide gear 121 when the auxiliary transmission lever 125 is positioned in the cutting reverse rotation groove 126a.

  The guide 127 includes a guide portion 127a and a connecting portion 127b. A pivot shaft is provided between the guide portion 127a and the connecting portion 127b, and a rotation fulcrum 127c is disposed. The guide portion 127a is formed in a U shape in plan view. The guide portion 127a is provided with a recess 127d having substantially the same width as the lever guide 126 from the neutral position to the lying down position, and the auxiliary transmission lever 125 is slidable within the recess 127d. One end of a wire 128 is fixed to the rear end of the connecting portion 127b, and the other end of the wire 128 is connected to the slide gear 121 provided in a counter case 64 that is a reverse gear case. Yes.

  In such a configuration, when the auxiliary transmission lever 125 is moved from the neutral position to the side, that is, the cutting reverse rotation position, the guide 127 is centered on the pivot fulcrum 127c, the guide portion 127a is on the right side, and the connecting portion 127b is connected. Rotates to the left, and the slide gear 121 is slid to the side meshing with the reverse rotation gear 124 via the wire 128. In such a state, when the mowing clutch is engaged and the main transmission lever 42 is set to the neutral position, the mowing drive is reversed. On the other hand, when the auxiliary transmission lever 125 is moved to the original position, that is, to the travel guide groove 126b, the slide gear 121 is engaged with the gear 123. When the mowing clutch is engaged and the auxiliary transmission lever and the main transmission lever are rotated to the gear shifting position, normal (normal rotation) mowing starts.

  In this way, the cutting output shaft that transmits power to the cutting unit 3 is configured to be able to switch between normal rotation and reverse rotation, so that when the cutting unit 3 is clogged, it is reversed and clogged. The cereals are transported in the original direction, and the clogging can be easily removed. In addition, by using the auxiliary gearshift lever to perform reverse operation from the neutral position, the reversing operation of the cutting is always performed from the stopped state, so that the cutting operation can be switched reliably and malfunctions can be prevented. Can do. Further, the forward / reverse switching can be easily performed from the operating unit.

  Next, a second embodiment of the power switching mechanism will be described. The power switching mechanism of the second embodiment is configured to perform switching by providing a clutch on the cutting tuning shaft. As shown in FIG. 6, the engine 35 is provided with a crankshaft 51 extending in the longitudinal direction of the fuselage, which converts a reciprocating motion of a piston (not shown) into a rotational motion, and one side of the crankshaft 51 serves as an output shaft 82. One end of a drive shaft 63 with a universal joint is fixed to the output shaft 82. An input shaft 75 is connected to the other end of the drive shaft 63 with a universal joint, and the input shaft 75 protrudes from a threshing-side mission case 39 that can be shifted to each processing system at an appropriate speed. Further, output shafts 91, 92, 93, and 99 project from the threshing-side mission case 39. The output shaft 99 transmits power to the HST of the traveling mission case 40 and is connected to the HST via pulleys 86 and 87, a belt 88, an input shaft 89, and the like. The cutting output shaft 92 transmits power to the cutting input shaft 72 via the one-way clutch 131, the output pulley 130, the cutting forward rotation clutch 132, and the normal rotation pulley 135.

  The traveling mission case 40 is provided with an HST case 118 for storing the HST. In the HST case 118, a turning HST 38 and a straight traveling HST 37 are arranged in order from the front. A work output shaft 134 serving as a cutting and tuning shaft is projected from the traveling mission case 40. The work output shaft 134 is attached with an output pulley 130 via the one-way clutch 131, and a reverse input pulley 133 is also fixed. is doing. The reverse input pulley 133 is connected to a reverse output pulley 137 fixed to the cutting input shaft 72 via a belt 138, and a cutting reverse rotation clutch 136 is provided on the belt 138. Further, the reverse rotation output pulley 137 uses a pulley having a diameter larger than that of the normal rotation pulley 135 so that a higher torque output can be obtained at the time of reverse rotation work of the cutting unit 3 than at the time of normal rotation work. .

  Next, switching operation of the cutting forward rotation clutch 132 and the cutting reverse rotation clutch 136 will be described. The clutches 132 and 136 are operated by a cutting clutch lever 140 provided in the operation unit 6. As shown in FIG. 7, the lever guide 141 of the cutting clutch lever 140 includes a forward rotation groove 141a slidable in the front-rear direction, a reverse rotation groove 141b provided in parallel therewith, a forward rotation groove 141a, and a reverse rotation groove. It is comprised by the groove | channel 141c for connection which connects 141b, and is formed in planar view substantially U shape. A link member is disposed below the lever guide 141. The link member is composed of a forward rotation link member 142, a reverse rotation link member 143, and a connecting member 144 for connecting the link member. The operation of the reaping clutch lever 140 is controlled by the reaping forward rotation clutch 132, the reaping motion. This is transmitted to the reverse clutch 136 and the like. The connecting member 144 is formed in a cylindrical shape, and a forward link member 142 is fixed on one side and a reverse link member 143 is fixed on the other side. The connecting member 144 supports the lower end of the support portion 140 a of the cutting clutch lever 140. The reaping clutch lever 140 is fixed to the connecting member 144 via the mounting member 149 so as to be rotatable in the left-right direction.

  The normal rotation link member 142 is disposed below the normal rotation groove 141a, and is formed in an L shape in a side view and a rear view. The forward rotation link member 142 includes an upper surface 142a in which a groove 142d into which the support portion 140a of the reaping clutch lever 140 can be fitted, a main body portion 142b for fixing the connecting member 144, and a rear side from the main body portion 142b. And a mounting portion 142c that protrudes. One end of a forward rotation clutch wire 145 is fixed to the mounting portion 142c, and the other end of the forward rotation clutch wire 145 is connected to the forward rotation clutch 132. On the other hand, the reverse link member 143 is disposed below the reverse rotation groove 141b and is formed substantially symmetrically with the forward link member 142 so that the forward link member 142, the reverse link member 143, Are arranged facing each other. The main body portion 143b of the reverse link member 143 is formed in a shape in which the main body portion 142b of the normal rotation link member 142 extends downward, and is formed in a substantially T shape in a side view. One end (rear end in this embodiment) of the reverse rotation clutch wire 146 is fixed to the attachment portion 143c of the reverse rotation link member 143, and the other end of the reverse rotation clutch wire 146 is connected to the reverse rotation clutch 136. is doing. One end of a connecting rod 147 is pivotally connected to the lower portion of the main body 143b.

  A projection 147a is provided at the other end (the front end in this embodiment) of the connecting rod 147, and the projection 147a is inserted into a long hole 148a of a plate 148, which will be described later, fixed to the lower portion of the main transmission lever 42. On the other hand, a plate 148 is disposed on the lower side of the support portion 42a of the main transmission lever 42. The plate 148 has a pivot fulcrum shaft 148b disposed in the middle in the vertical direction, and an arc-shaped long hole 148a centering on the pivot fulcrum shaft 148b is formed in the upper part, and the lower part is mainly connected via a link or the like. It is connected with a transmission. The projection 147a of the connecting rod 147 is inserted into the elongated hole 148a, and the projection 147a slides in the elongated hole 148a in the front-rear direction when the main transmission lever 42 is operated.

  In such a configuration, when the cutting clutch lever 140 is slid forward while the cutting clutch lever 140 is tilted forward and fitted in the groove 142d, the forward link member 142 has an upper part at the front and a lower part at the rear. And the forward rotation clutch wire 145 is pulled, the forward rotation clutch 132 is turned on, and the forward rotation power is transmitted to the cutting input shaft 72 by the forward rotation pulley 135. By doing so, the power of normal rotation is transmitted to the cutting unit 3. On the other hand, when the mowing clutch lever 140 is rotated forward while the mowing clutch lever 140 is tilted to the reverse side and fitted in the groove 143d, the link member 143 for reverse rotation is pivoted so that the upper part rotates forward and the lower part rotates rearward. Since the portion 143c moves upward, the reverse rotation clutch wire 146 is pulled, the cutting reverse rotation clutch 136 is engaged, and the connecting rod 147 pivotally connected to the lower portion of the main body portion 143b moves rearward. At this time, if the main transmission lever 42 is in the state of being shifted forward, the projection 147a comes into contact with the inner end of the long hole 148a, and the main transmission lever 42 is returned to the neutral position. Thus, erroneous operations such as reverse operation while moving forward are prevented. In addition, it will not clog because it does not work when going backwards. Then, when the main transmission lever 42 is in the neutral position, the cutting clutch lever 140 is rotated to the reverse side, and the main transmission lever 42 is rotated to the reverse side, whereby the cutting input shaft 72 is decelerated by the reverse output pulley 137. Thus, the reverse power is transmitted to the cutting unit 3. The threshing-side mission case 39 is not driven in reverse by the one-way clutch 131.

  In this way, the cutting output shaft that transmits power to the cutting unit 3 can be switched between normal rotation and reverse rotation, so that when the cutting unit 3 is clogged, it can be easily reversed. Clogging can be removed. Further, by operating the mowing clutch lever 140, the mowing normal rotation clutch 132 or the mowing reverse rotation clutch 136 is engaged, so that the mowing operation can be switched reliably. Further, when the reaping clutch lever 140 is operated to the reverse side, the main transmission lever 42 returns to the neutral position, so that it is possible to prevent erroneous operation of the work.

  Next, a third embodiment of the power switching mechanism will be described. The power switching mechanism of the third embodiment is disposed in a bevel case 153 provided on the cutting input shaft 72. As shown in FIG. 8, power is transmitted from the engine 35 to the threshing-side mission case 39 via the drive shaft 63. Power is transmitted from the threshing-side mission case 39 to the HST of the traveling mission case 40 via the output shaft 99. A work output shaft 134 projects from the traveling mission case 40, and an output pulley 130 is attached to the work output shaft 134 via a one-way clutch 131. Further, a cutting output shaft 92 protruding from the threshing-side mission case 39 is connected to the output pulley 130 via a pulley 105 and a belt 106, and the output pulley 130 is also connected to the threshing-side mission case 39. Power is being transmitted to The output pulley 130 is connected to a forward rotation pulley 135 fixed to the cutting input shaft 72 via a belt, and a cutting forward rotation clutch 132 is provided on the belt. Other configurations are the same as those in the second embodiment.

  As shown in FIG. 9, the cutting input shaft 72 is covered with a bevel case 153. Further, a forward rotation bevel gear 151 and a reverse rotation bevel gear 152 are rotatably supported on the cutting input shaft 72 via bearings. The forward rotation bevel gear 151 and the reverse rotation bevel gear 152 are arranged to face each other. A sliding member 156 is spline-fitted on a cutting input shaft 72 between the forward bevel gear 151 and the reverse bevel gear 152. The sliding member 156 is engaged with a shifter fork 157a projecting from a shifter shaft 157 serving as an operating member, and the operating member is slid by a reversing lever or the like provided in the operating unit 6. The member 156 can be moved. Further, the operation member (shifter shaft) 157 protrudes to the outside of the bevel case 153 so that forward / reverse switching can be performed from the outside of the bevel case 153. The forward bevel gear 151 and the reverse bevel gear 152 are formed with grooves 151a and 152a, respectively. The groove portion 151a of the forward rotation bevel gear 151 has a shape in which a tooth portion on one side of the sliding member 156 can be fitted, and the groove portion 152a of the reverse rotation bevel gear 152 has a tooth portion on the other side of the sliding member 156. The shape can be fitted. Further, a bevel gear 154 is engaged with both the forward rotation bevel gear 151 and the reverse rotation bevel gear 152, and the bevel gear 154 is integrated with a cutting 2 shaft 155 disposed in a direction perpendicular to the cutting input shaft 72. It is fixed to.

  When the sliding member 156 is fitted into the groove 151 a of the forward rotation bevel gear 151 by the operation member 157, the power of the cutting input shaft 72 is transmitted to the forward rotation bevel gear 151, and the forward rotation bevel gear 151 causes the bevel gear 154 to move. It rotates and transmits the normal rotation power to the cutting two-shaft 155. On the other hand, when the sliding member 156 is fitted into the groove portion 152 a of the reverse rotation bevel gear 152 by the operation member 157, the power of the cutting input shaft 72 is transmitted to the reverse rotation bevel gear 152. , And the reverse power is transmitted to the cutting two-shaft 155. With such a configuration, the forward / reverse switching can be easily performed by operating the operation member 157, and when the cutting unit 3 is clogged, the clogging can be easily removed by reversing. .

  Next, each transport mechanism supported by the cutting frame 11 will be described. As shown in FIG. 3 and FIG. 10, the cutting frame 11 has a weed board 20, 20... A cereal-triggering device 21 that causes cereals that have been weeded by 20... A cutting blade device 23 that reaps the stock of the culm scraped by the cereal scraping device 22, and a lower transport mechanism 24 that transports the lower part of the culm cut by the cutting blade device 23 to the threshing unit 4 side. The upper transport mechanism 25 that transports the upper part of the cereal masher toward the threshing unit 4, the tip transport mechanism 26 that transports the tip part of the cereal masher, and the threshing unit 4 from the lower transport mechanism 24 via the vertical transport mechanism 19. Auxiliary transport mechanism 27 and the like for assisting in delivering cereals to the feed chain 8 are attached. There.

  The grain raising device 21 is provided with standing cases 30 extending in the vertical direction at a position immediately after the weed plates 20, 20 adjacent to the left and right, and an upper portion of each raising case 30 and the upper lateral side. A raising drive case 46 is interposed between the frame 16 and the frame 16. Then, at the position immediately after each pulling case 30, the tine-equipped stirrer belt 32 and the star wheel 33 are arranged so as to be opposed to each other in the vertical direction to constitute the grain crushing device 22.

  The upper transport mechanism 25 rakes up the upper part of the left side cereal and transports it to the inner rear merging part and rakes the upper part of the central cereal part to the inner rear merging part. It includes a left upper transport mechanism 25M that transports and a right upper transport mechanism 25R that scrapes up the upper part of the right side cereal and transports it to the confluence section on the inner rear side. The right upper transport mechanism 25R is divided into a front transport body 25RF and a rear transport body 25RR.

  The lower transport mechanism 24 includes a left lower transport mechanism 24L that sandwiches the lower part of the left side cereal and transports it to the inner rear merging part, and an inner rear rear part that sandwiches the lower part of the central cereal part. The lower central transport mechanism 24M that transports to the part, the lower right transport mechanism 24L that sandwiches the lower part of the right side cereal and transports it to the confluence section on the inner rear side, and is transported by these transport mechanisms and merges at the confluence section And a vertical transport mechanism 19 that sandwiches the lower portion of the cereal and transports it to the feed chain 8. The left upper transport mechanism 25L is a left lower transport mechanism 24L, the left upper transport mechanism 25M is a central lower transport mechanism 24M, the front transport body 25RF is a right lower transport mechanism 24L, and the rear transport body 25RR is a vertical transport mechanism 19. And it arrange | positions so that it may oppose up and down, respectively, and it is made to hold | maintain and convey the upper and lower parts of a grain bowl reliably.

  Next, the power reverse rotation preventing device will be described. The power reversal prevention device is a one-way clutch (one-way clutch) for preventing the tine provided in the mowing unit 3 from reversing when the power of the reverse rotation is transmitted to the mowing unit 3 by the power switching mechanism. ) And the like, and the chain-type transport mechanisms such as the lower transport mechanism 24 and the vertical transport mechanism 19 are reversed to remove clogs, and the tine-type transport mechanisms such as the upper transport mechanism 25 and the pulling device are It is provided to prevent damage.

  First, a power reversal prevention device for the upper transport mechanism 25 will be described. As shown in FIGS. 10 and 11, the upper transport mechanisms 25L, 25M, 25RF, and 25RR are composed of a drive sprocket 43, a driven sprocket, a chain 48, a transport tine, and the like. A drive sprocket 43 for driving is interposed between a shaft 45 and a one-way clutch 44 which is a reverse rotation prevention device. In this way, when the reverse rotation power is transmitted to the cutting unit 3 by using the one-way clutch as the reverse rotation prevention device for the drive sprockets 43 of the upper conveyance mechanisms 25L, 25M, 25RF, and 25RR, the upper conveyance is performed. The mechanisms 25L, 25M, 25RF, 25RR and the transport tine are not reversed, and the lower transport mechanism is reversed, so that clogging of cereals and the like can be easily removed, and at the same time, the conveyance tine is prevented from being damaged due to the reverse rotation. Can do.

  Next, the power reverse rotation preventing device for the pulling drive mechanism 31 and the tip transport mechanism 26 will be described. As shown in FIG. 10, the power transmitted from the engine 35 to the cutting two-shaft 155 through the power switching mechanism is transmitted to the pulling-up two-shaft 161 through the cutting three-shaft 158 and the pulling-up one shaft 159. . As shown in FIG. 10, the power transmitted from the engine 35 to the cutting two-shaft 155 via the power switching mechanism is raised and transmitted to the one-shaft 159 via the cutting three-shaft 158. The pulling one shaft 159 is connected to a pulling and shifting mechanism 165 that shifts according to the degree of lodging of the cereal and the two-shaft is driven by the pulling and shifting mechanism 165. 161. An input side bevel gear 163 is fixed to the front end of the pulling two-shaft 161, and the input side bevel gear 163 is engaged with the output side bevel gear 164. The output-side bevel gear 164 is fixed so as to be able to rotate integrally with the three shafts. And it is set as the structure which transmits motive power to the said raising drive mechanism 31 and the tip conveyance mechanism 26 from this raising 3 axis | shaft.

  A reverse rotation prevention device is provided on the downstream side of the pulling transmission mechanism 165 in the power transmission path. In this embodiment, the input side bevel gear 163 is provided with a one-way clutch 166 which is a reverse rotation preventing device. In other words, a one-way clutch 166 is interposed between the input-side bevel gear 163 and the pulling one shaft 159 so that only forward rotation power is transmitted to the input-side bevel gear 163. With this configuration, when reverse power is transmitted to the pulling two-shaft 161, the pulling drive mechanism 31, the tip transport mechanism 26, and the trigger drive mechanism 31 and the tip transport mechanism 26 are provided. The transport tine being driven is not driven by the one-way clutch 166, and the transport tine can be prevented from being damaged due to reverse rotation. In this embodiment, the input side bevel gear 163 is provided with the reverse rotation prevention device, but the output side bevel gear 164 may be provided with the reverse rotation prevention mechanism in the same configuration.

  Further, the reverse rotation prevention device can be raised and provided in the drive mechanism 31. As shown in FIG. 12, the moving drive mechanism 31 is provided in the raising case 30. A chain 31e is wound between the raising case sprockets 31c and 31d, and a plurality of raising tines 31a... Are attached to the chain. The pulling tines 31a are mounted so as to be able to turn substantially in the vertical direction, and the pulling tines 31a are mounted so as to advance when moving upward and to exit when moving downward. The drive sprocket 31c is provided with a one-way clutch that is a reverse rotation prevention device. When a reverse driving force is transmitted to the cutting unit 3 by the forward / reverse switching mechanism, the drive sprocket 31c The tine 31a is prevented from being driven, and the tine 31a is prevented from being damaged by reverse rotation. Moreover, it can also be set as the structure which provides a reverse rotation prevention apparatus in the tip conveyance mechanism 26 by the same structure.

  It has the cutting part 3 which cuts the grain husk and conveys it to the threshing part 4 side, and the power transmission mechanism disposed between the output shaft 82 of the engine 35 and the cutting part 3 has a normal rotation of the power of the cutting part 3. In a combine provided with a power switching mechanism for switching reverse rotation, the engine 35 is configured to transmit power from the output shaft 82 of the engine 35 into the traveling mission case 36 and to output from the straight drive shaft 81 of the traveling mission case 36. A counter case 64 that can be shifted to the speed of each processing system is disposed on the side of the processing system 35. Power is transmitted from the engine 35 to the input shaft 76 of the counter case 64, and the vehicle speed protruding from the counter case 64 is further increased. Power is transmitted to the tuning input shaft 75 also from the straight drive shaft 81 of the traveling mission case 36, and the power transmission mechanism disposed in the counter case 64 includes the cowl In the case 64, a gear type switching unit is provided to transmit power from one of the vehicle speed tuning input shaft 75 and the direct input shaft 76 to the cutting transmission shaft 122, and between the cutting transmission shaft 122 and the cutting output shaft 92. A switching mechanism for switching between normal rotation and reverse rotation of the power. The cutting output shaft 92 projects from the counter case 64, transmits power from the cutting output shaft 92 to the cutting input shaft 72, and the cutting unit 3 Therefore, when the cutting unit is clogged, the clogging can be easily removed by reversing the power to the cutting unit. Further, the power switching mechanism is composed of at least a slide gear, a normal rotation gear, and a reverse rotation gear, and is engaged with the normal rotation gear or the reverse rotation gear by a sliding operation of the slide gear to switch between the normal rotation and the reverse rotation. When clogging occurs, the clogging can be easily removed by reversing the power to the cutting unit.

  The switching mechanism for switching between forward rotation and reverse rotation includes a slide gear 121, a normal rotation gear 123, and a reverse rotation gear 124 disposed in the counter case 64. The slide gear 121 is configured to mesh with the reverse gear 124, and the auxiliary transmission lever 125 provided in the operating unit 6 is interlocked and connected. The reverse position is provided on the side of the neutral position of the lever guide of the transmission lever 125, and the slide Since the sliding of the gear 121 is performed by rotating the auxiliary transmission lever (125) to the side reverse rotation position, the cutting operation is reversed from the stopped state to surely switch the cutting operation. It is possible to prevent malfunction.

  Moreover, it has the cutting part 3 which cuts the grain husk and conveys it to the threshing part 4 side, and the power transmission mechanism arranged between the output shaft 82 of the engine 35 and the cutting part 3 transmits the power of the cutting part 3. In a combine provided with a power switching mechanism for switching between normal rotation and reverse rotation, the output shaft 82 of the engine 35 is connected to the input shaft 75 of the threshing-side mission case 39, and the output shaft 99 and the cutting output are output from the threshing-side mission case 39. A shaft 92 is protruded, the output shaft 99 transmits power to the traveling mission case 40, and the cutting output shaft 92 is connected via a one-way clutch 131, an output pulley 130, a cutting forward rotation clutch 132, and a forward rotation pulley 135. Then, the power is transmitted to the cutting input shaft 72, the work output shaft 134 projects from the traveling mission case 40, and the work output shaft 134 is connected to the work output shaft 134 via the one-way clutch 131. In addition to attaching a force pulley 130, a reverse rotation input pulley 133 is also fixed. The reverse rotation input pulley 133 is connected to a reverse rotation output pulley 137 fixed to the cutting input shaft 72 via a belt 138. Is provided with a cutting reversing clutch 136, and the switching operation of the cutting normal rotation clutch 132 and the cutting reversing clutch 136 is performed by a cutting clutch lever 140 provided in the operation unit 6, and therefore the cutting unit is clogged. Sometimes, clogging can be easily removed by reversing the power to the cutting unit.

  Further, when the operation of the harvesting clutch lever 140 and the operation of the main transmission lever 42 are interlocked and the main transmission lever 42 is shifted to the forward side and the harvesting clutch lever 140 is operated to the reverse side, the main transmission lever 42 is Since it is configured to return to the neutral position, the cutting operation can be switched reliably and malfunction can be prevented.

  Moreover, it has the cutting part 3 which cuts the grain husk and conveys it to the threshing part 4 side, and the power transmission mechanism arranged between the output shaft 82 of the engine 35 and the cutting part 3 transmits the power of the cutting part 3. In the combine provided with a power switching mechanism for switching between normal rotation and reverse rotation, a power switching mechanism for switching between normal rotation and reverse rotation of the power of the cutting unit 3 is provided, and the power switching mechanism is connected to the threshing side from the output shaft 82 of the engine 35. Power is transmitted to the mission case 39, power is transmitted from the threshing-side mission case 39 to the traveling mission case 40 via the output shaft 99, and the work output shaft 134 projects from the traveling mission case 40 to the work output shaft 134. The output pulley 130 is attached via the one-way clutch 131, and the cutting output shaft 92 protruding from the threshing-side mission case 39 includes a pulley 105, It is connected to the output pulley 130 via a bolt 106 and transmits power to the output pulley 130 from the threshing-side transmission case 39, and the output pulley 130 is fixed to the cutting input shaft 72. The belt 135 is connected to a pulley 135 via a belt, and the belt is provided with a forward cutting clutch 132. The forward input bevel gear 151 and the reverse bevel gear 152 are supported on the cutting input shaft 72, and the forward rotation bevel gear 151 and the reverse rotation bevel gear are supported. A sliding member 156 is spline-fitted on the cutting input shaft 72 between the sliding member 152 and the sliding member 156 is slid by a reversing lever or the like provided in the operating unit 6 to perform forward rotation. -Since it is configured to perform reverse switching, clogging can be easily removed by reversing the power to the cutting unit when the cutting unit is clogged.

  In addition, since a one-way clutch is provided on the drive side of the transport mechanism having a tine to prevent the tine from reversing, the tine is not driven by the reversing prevention device when the power of the reversing is transmitted to the cutting unit. Tyne breakage can be prevented.

The side view which showed the whole structure of the combine which concerns on one Example of this invention. FIG. The side view of a cutting part. The skeleton figure which shows the power transmission structure outline | summary of a 1st Example. The figure which shows a subtransmission lever. The skeleton figure which shows the power transmission structure outline | summary of 2nd Example. The figure which shows a mowing clutch lever. The skeleton figure which shows the power transmission structure outline | summary of 3rd Example. Sectional drawing which shows a bevel case. The skeleton figure which shows the power transmission structure outline | summary of a cutting part. The figure which shows the sprocket which has a one-way unit. The figure which shows a raising drive mechanism.

Explanation of symbols

3 Cutting part 4 Threshing part 121 Slide gear 123 Forward rotation gear 124 Reverse rotation gear 125 Sub-transmission lever

Claims (1)

  In a combine having a harvesting unit that harvests cereal and transports it to the threshing unit side, a power switching mechanism is provided between the engine output shaft and the harvesting unit to switch between normal rotation and reverse rotation of the power of the harvesting unit. Combine to do.

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