JP5480698B2 - Combine harvester - Google Patents

Description

  The present invention relates to a combine harvester configured to join harvested crops to the center side and deliver them to a transport device.

  The conventional combine harvester includes a right and left stock transport chain for nipping and transporting a stock of harvested crops, and a sprocket wound around each of the right and left stock transport chains. Some crops are transported along the transport path from the transport start end to the transport end in the right stock transport chain and along the transport path from the transport start end to the transport end in the left stock transport chain ( For example, see Patent Document 1.)

JP 2001-095355 A

  In the conventional combine harvester, straw scraps and the like are rolled up in accordance with the cutting operation of the harvester, and the rolled up scraps and the like are lowered, from the transfer terminal end in the right stock transport chain to the transport start end. It may adhere to the upper surface of the return path and the return path from the transfer end to the transfer start end in the left stock transport chain. In such a state, for example, the attached straw scraps are transported to the sprocket by the stock transport chain, and the stock transport chains may fall off the sprocket due to the trap scraps being entangled with the sprocket. There was a possibility that it could not be transported well. In addition, maintenance work is complicated because it is necessary to frequently clean the sprocket to prevent the stock transport chain from falling off the sprocket.

  An object of the present invention is to provide a harvesting unit for a combine that can prevent straw scraps from adhering to the stock transportation chain, and can transport a harvested crop well while simplifying maintenance work. It is in.

The harvesting part of the combine according to the present invention includes right and left stock transport chains for sandwiching and transporting a stock of the harvested crop, and a transport device positioned behind the right and left stock transport chains, Is transported along the transport path from the transport start end to the transport end of the right stock transport chain and the transport path from the transport start to the transport end of the left stock transport chain. The harvested crops are joined to the central side and delivered to the transport device,
The first characteristic configuration is that a right drive sprocket is provided on the return path from the transfer end to the transfer start end in the right stock transport chain, and the right drive sprocket in the return path is on the transfer end side. Provide a right cover that covers the top of the part , and
A left drive sprocket is provided on the return path from the transfer end to the transfer start end in the left stock transport chain, and covers the upper part of the return path from the left drive sprocket to the transfer end. The left cover is provided.

  According to this configuration, it is possible to prevent straw scraps and the like from adhering to the upper surface of the return path in the right and left stock transport chains. For example, the attached straw scrap and the like to the sprocket by the right and left stock transport chains. The harvested crop can be transported satisfactorily, such as preventing the stock transport chain from falling off the sprocket due to being transported and entangled with the sprockets. In addition, the number of maintenance operations can be reduced, for example, since it is not necessary to frequently clean the sprocket to prevent the stock transport chain from falling off the sprocket.

The second characteristic configuration of the present invention includes right and left transmission cases that extend upward from a counter case extending in the left-right direction from the cutting part frame and are connected to a pulling device, and each of the right and left transmission cases includes , an opening is formed, wherein the right and left of each of the transmission case, is caused transmission shaft is furnished, on the right causing the transmission shaft, the right drive sprocket to be integrally rotated, the right opening The left drive sprocket is attached to the left opening so that the left drive sprocket can rotate integrally with the left pulling transmission shaft, and the right stock transport chain is connected to the right transmission shaft. The right drive sprocket is wound while passing through the opening of the case, and the left stock transport chain is configured to wind the left drive sprocket while passing through the opening of the left transmission case. Yes The end of the right cover is attached in the vicinity of the opening of the right transmission case, and the end of the left cover is attached in the vicinity of the opening of the left transmission case.

  According to this configuration, the end of the right cover is attached near the opening of the right transmission case, and the end of the left cover is attached near the opening of the left transmission case. The gap between the end of the cover and the opening of the transmission case can be prevented. As a result, straw scraps can be prevented from entering the right and left transmission cases from the openings of the right and left transmission cases, and the harvested crop can be transported more satisfactorily.

According to a third characteristic configuration of the present invention, a portion to which the drive sprocket is attached in each of the right and left transmission cases is configured in a circumferentially divided manner including a first case portion and a second case portion. The first case portion and the second case portion in the right transmission case are connected by a connector, and the right cover is connected to the right transmission case by the connector, in the left transmission case. The first case part and the second case part are connected by a connector, and the left cover is connected to the left transmission case by the connector.
According to a fourth characteristic configuration of the present invention, a collar that covers at least one of the right upper side and the right lower side of each of the right and left drive sprockets can be rotated with respect to the drive sprocket and the pulling transmission shaft. The point is extrapolated.

  According to this configuration, the collar that covers at least one of the right and left sprockets of the right and left sprockets is extrapolated to the sprocket and the pulling transmission shaft so as to be free to rotate. Even if debris gets entangled with the sprocket, the collar rotates together with the debris etc. by pulling the debris etc. with the cutting part (the pulling transmission shaft) stopped. be able to.

It is a side view which shows a combine. It is the schematic which shows a 1st conveying apparatus and a 2nd conveying apparatus. It is a top view which shows a cutting part. It is a cross-sectional view which shows a counter case and a raising case. It is a top view which shows a stock former conveyance chain and a cover. It is a side view which shows a cutting part. It is a longitudinal section showing a drive sprocket and a collar. It is a longitudinal cross-sectional view which shows the operating force provision mechanism. It is a cross-sectional view showing an operating force application mechanism.

  Hereinafter, the combine which concerns on this invention is demonstrated.

〔overall structure〕
As shown in FIG. 1, the combine includes a traveling machine body 2 including left and right crawler traveling devices 1, a cutting unit 3 that is connected to the upper part of the front part of the traveling machine body 2 so as to be movable up and down, and a front right side of the traveling machine body 2. Driving unit 4 provided in the section, threshing device 5 mounted on the left rear part of the traveling machine body 2, grain recovery tank 6 mounted on the right rear part of the traveling machine body 2, and rear part of the grain recovery tank 6 The grain discharge auger 7 provided in the above, and the threshing apparatus 5 and the waste straw processing apparatus 8 mounted on the rear part of the grain discharge auger 7 are provided.

[Mowing section]
As shown in FIGS. 1 to 6, the cutting unit 3 includes four dividers 11 </ b> A to 11 </ b> D that weed the planted crop, and three pulling devices that cause the planted crop that has been weeded to a predetermined cutting posture. 12R, 12C, 12L, a clipper type mowing device 13 for cutting the planted crop caused by the pulling device 12, and a first transport device 71 and a second transport device 72 (for transporting the cut planted crop backward) An example of a transport device).

(Various cases that make up the cutting part)
As shown in FIGS. 1 to 6, the cutting unit 3 includes a lateral gear case 21 with a cutting shaft (not shown) and a first transmission shaft 22 and a front lower portion from the center of the gear case 21. A trimming part frame 23 extending in the direction of the right side, a counter case 25 extending in the left-right direction from the lower end of the trimming part frame 23, and a third transmission shaft 26 (an example of a right pulling transmission shaft). A right pulling case 27R (an example of a right transmission case) that extends upward from the right end of the counter case 25, and a connection case 29 that includes a fourth transmission shaft 28 and extends forward from the center of the counter case 25. The fifth transmission shaft 30 (an example of a central transmission transmission shaft) is internally provided and extends upward from the tip of the connection case 29. The central transmission case 27C (an example of a central transmission case) and the sixth transmission shaft 3 Includes a (left example of causing transmission shaft) is furnished with the left causes case 27L extending from the left end over the counter case 25 (an example of a left transmission case), the.

Specifically, the right pulling case 27R includes a cylindrical upper case 41 and a front / rear split type lower case 42 ( corresponding to a portion to which a drive sprocket is attached in the right transmission case) 42. The lower case 42 has a front case portion (corresponding to the first case portion) 42A, a rear case portion (corresponding to the second case portion) 42B, and a cross-sectional shape that covers the outer sides of the flange portions of both the case portions 42A and 42B. A U-shaped channel member 43 is provided. A plurality of bolts (corresponding to connecting tools) 44 are used to fasten and fix the flange portions of the case portions 42A and 42B and the bent portion of the channel member 43 together. The third transmission shaft 26 is configured in a vertically divided manner. The upper case 41 includes an upper portion of the third transmission shaft 26 and the lower case 42 includes a lower portion of the third transmission shaft 26. Has been. In the middle of the lower case 42, a rectangular box-shaped bulge in plan view that accommodates the right drive sprocket 45R (an example of the right sprocket) fixed to the middle portion of the lower portion of the third transmission shaft 26. A portion 46 is formed. Between the bulging portion 46 and the channel member 43, a right opening 47R including two opening portions arranged in the front-rear direction is formed.

  A shaft core member 48 penetrating in the vertical direction is attached to the bulging portion 46. A spring 49 is provided outside the shaft core member 48. One end portion of the spring 49 is fixed to the bulging portion 46, and a curved portion 49A on the other end side of the spring 49 abuts on a right stock transport chain 78R described later. Thus, the right stock transport chain 78R is configured to be prevented from coming off from the right drive sprocket 45R.

The left pulling case 27L has the same configuration as the right pulling case 27R, and includes a cylindrical upper case 41 and a front / rear split lower case (corresponding to a portion to which a drive sprocket is attached in the left transmission case) 42 And. The lower case 42 has a front case portion (corresponding to the first case portion) 42A, a rear case portion (corresponding to the second case portion) 42B, and a cross-sectional shape that covers the outer sides of the flange portions of both the case portions 42A and 42B. A U-shaped channel member 43 is provided. A plurality of bolts (corresponding to connecting tools) 44 are used to fasten and fix the flange portions of the case portions 42A and 42B and the channel member 43 together. The sixth transmission shaft 31 is configured in a vertically divided manner. The upper case 41 includes an upper portion of the sixth transmission shaft 31 and the lower case 42 includes a lower portion of the sixth transmission shaft 31. Has been. In the middle of the lower case 42, a rectangular box-like bulge in plan view that accommodates the left drive sprocket 45L (an example of the left sprocket) fixed to the middle portion of the lower portion of the sixth transmission shaft 31. A portion 46 is formed. Between the bulging portion 46 and the channel member 43, a left opening 47L formed of two opening portions arranged in the front-rear direction is formed.

  A shaft core member 48 penetrating in the vertical direction is attached to the bulging portion 46. A spring 49 is provided outside the shaft core member 48. One end portion of the spring 49 is fixed to the bulging portion 46, and a curved portion 49A on the other end side of the spring 49 abuts on a left stock transport chain 78L described later. Accordingly, the left stock transport chain 78L is configured to be prevented from being detached from the left drive sprocket 45L.

(Color)
As shown in FIG. 7, the right drive sprocket 45 </ b> R includes a cylindrical shaft portion 32 that is rotatably supported at a lower portion of the bulging portion 46 and a claw portion formed at the upper end portion of the shaft portion 32. A rotating portion 33. A cylindrical upper collar 34 (an example of a collar) covering the upper side of the right drive sprocket 45R (between the upper portion of the bulging portion 46 of the third transmission shaft 26 and the rotating portion 33 of the right drive sprocket 45R), The third transmission shaft 26 is extrapolated so as to be free to rotate. A cylindrical lower collar 35 (an example of a collar) that covers the lower side of the right drive sprocket 45R (the shaft portion 32 of the right drive sprocket 45R) is rotatable with respect to the shaft portion 32 of the right drive sprocket 45R. Extrapolated.

  The left drive sprocket 45L includes a cylindrical shaft portion 32 rotatably supported at the lower portion of the bulging portion 46 and a rotating portion 33 which is a claw portion formed at the upper end portion of the shaft portion 32. ing. A cylindrical upper collar 34 (an example of a collar) that covers the upper side of the left drive sprocket 45L (between the upper portion of the bulging portion 46 of the sixth transmission shaft 31 and the rotating portion 33 of the left drive sprocket 45L), The sixth transmission shaft 31 is extrapolated so as to be free to rotate. A cylindrical lower collar 35 (an example of a collar) that covers the lower side of the left drive sprocket 45L (the shaft portion 32 of the left drive sprocket 45L) is rotatable with respect to the shaft portion 32 of the left drive sprocket 45L. Extrapolated. As a result, even if cracks and the like are entangled with the right and left drive sprockets 45R and 45L, by pulling the cracks and the like with the third and sixth transmission shafts 26 and 31 stopped, The collar 34 and the lower collar 35 rotate together with the straw scraps and the like, and the straw scraps and the like can be easily pulled out and removed.

(Operating force application mechanism)
As shown in FIGS. 8 and 9, the cutting unit 3 is swung up and down around the swinging fulcrum X across the cutting unit frame 23 of the cutting unit 3 and the front end of the body frame 103 of the traveling machine body 2. A hydraulic cylinder CY is interposed. An operating force applying mechanism SK that is provided with a balance spring 121 and applies an ascending operating force to the cutting unit 3 is attached to the front end of the body frame 103 of the traveling unit 2, and a spring pad that is fixed to the cutting unit frame 23. 122 is detachably contacted and supported by the operating force applying mechanism SK. By applying a raising operation force to the cutting unit 3 by the operation force applying mechanism SK, the lower part of the cutting unit 3 is in contact with the field scene while preventing the dividers 11A to 11D of the cutting unit 3 from entering the field scene. The cutting operation (so-called ground cutting) can be performed in the state.

  The operating force applying mechanism SK includes two balance springs 121 provided side by side in a region above the hydraulic cylinder CY, and a spring contact portion 122 provided on the rear side of the cutting unit frame 23. . The balance spring 121 is covered with a flexible spring cover (not shown).

  A spring holder 124 is attached to each of the two balance springs 121. The spring holder 124 includes a distal end side holder 128 in which a locking cylinder portion 128 a enters and locks on the distal end side of the balance spring 121, and a proximal end side in which a locking cylinder portion 125 a enters and locks on the proximal end side of the balance spring 121. A holder 125 and a connecting rod 129 for fastening and connecting the locking cylinders 128a and 125a are provided. Thereby, the balance spring 121 maintains the initial compression deformation state.

  The base frame side holder 125 of the spring holder 124 is received and supported by the body frame 103 by a seat plate 126a of the spring holder 126 to which the spring holder 126 is fixed. Two spring telescopic guide rods 127 are attached to the seat plate 126a of the spring pedestal 126 and extend forward. Each of the two spring telescopic guide rods 127 passes through the proximal end side holder 125 and the distal end side holder 128 and protrudes from the distal end side holder 128.

  A plurality of plate-shaped shims 131 for load adjustment are bolted to the surface of the distal end side holder 128 on the spring contact portion 122 side. By increasing or decreasing the number of the shims 131, the lifting operation force of the cutting unit 3 can be adjusted. Thereby, even if it does not remove the cutting part 3, the number of the shims 131 can be increased / decreased by simple operation which only rocks the cutting part 3 upwards.

  A cylindrical resin bush 132 is attached to the guide hole portion of the distal end side holder 128 so as to penetrate the distal end portion of the telescopic guide rod 127. A plurality of ribs (not shown) are formed on the inner peripheral portion of the bush 132 along the axial direction. Thereby, the sliding of the bush 132 and the telescopic guide rod 127 can be improved, and the wear of the telescopic guide rod 127 can be prevented. Further, it is possible to prevent the balance spring 121 from being bent by the extension guide rod 127 being caught in the guide hole portion of the distal end side holder 128.

(Various devices attached to the cutting part)
As shown in FIGS. 1-6, the substantially L-shaped 1st cutting frame 51 is extended ahead from the right end part of the said counter case 25 by planar view. A straight second cutting frame 52 extends forward from a position on the right side of the counter case 25. A straight third trimming frame 53 extends forward from the left side of the counter case 25. A substantially L-shaped fourth cutting frame 54 extends forward from the left end of the counter case 25 in plan view. A clipper-type cutting device 13 is attached over the cutting frames 51 to 54.

  A divider 11 </ b> A and a right attachment frame 55 are fixed to the distal end portion of the first cutting frame 51. The right side mounting frame 55 includes a base end side mounting portion and a distal end side bent portion, and is configured in a substantially L shape in a front view. The front end portion of the bent portion of the right mounting frame 55 and the upper end portion of the upper case 41 in the right pulling case 27R are connected to the back side of the right pulling device 12R. The right pulling device 12R is supported by the case 27R.

During developing of the right mounting frame 55, the right connecting pipe 56 is connected. The right connection pipe 56 is connected to a front-rear-facing first portion that is bent in a dogleg shape in plan view, a vertically-facing second portion that is connected to the channel member 43, and a rear support bracket 146 that will be described later . And a horizontal third portion. A right support bracket 141 is fixed to the left side of the first portion of the right connection pipe 56. A right-side shaft member 142 is supported on the lower side of the front portion of the right-side support bracket 141. The right-hand shaft member 142 has a drive pulley 81, a second driven sprocket 77, and a right side, which will be described later in order from the top. The rotation rotating packer 75R is supported rotatably.

  A plurality of conveyance guides 57 for guiding the divider 11B and the planted crop are fixed to the distal end portion of the second cutting frame 52.

  A divider 11 </ b> C, a central mounting frame 58, and a plurality of conveyance guides 59 for guiding planted crops are fixed to the distal end portion of the third cutting frame 53. The center mounting frame 58 is provided with a base end side mounting portion and a distal end side bent portion, and is configured in a substantially L shape in a front view. The front end portion of the bent portion of the central mounting frame 58 and the upper end portion of the central pulling case 27C are connected to the back side of the central pulling device 12C, and by the central mounting frame 58 and the central pulling case 27C, A central pulling device 12C is supported.

  A front support bracket (not shown) is connected across the central mounting frame 58 and the central raising case 27C. A central shaft core member 143 that is vertically oriented is supported on the lower side of the front portion of the front support bracket, and a drive pulley 84 and a central take-up rotation packer 75C, which will be described later, are arranged on the central shaft member 143 in order from the top. It is rotatably supported.

  A divider 11 </ b> D and a left attachment frame 60 are fixed to the distal end portion of the fourth mowing frame 54. The left mounting frame 60 includes a mounting portion on the proximal end side and a bent portion on the distal end side, and is configured in a substantially L shape in a front view. The front end portion of the bent portion of the left mounting frame 60 and the upper end portion of the upper case 41 in the left pulling case 27L are connected to the back side of the left pulling device 12L. The left pulling device 12L is supported by the case 27L.

  A left connecting pipe 61 is connected in the middle of the mounting portion of the left mounting frame 60. The left connecting pipe 61 includes a first portion that is bent in a dogleg shape in plan view and a second portion that is connected to the channel member 43 and that is vertically oriented. A left support bracket 144 is fixed to the right side of the first portion of the left connection pipe 61. A chain guide portion 80 to be described later is fixed in the middle of the second portion of the left connecting pipe 61. A left shaft core member 145 that is vertically oriented is supported on the lower side of the front portion of the left support bracket 144. The left shaft core member 145 has a drive pulley 87, a driven sprocket 79, and a left scraper 79, which will be described later in order from the top. The embedded rotary packer 75L is rotatably supported.

  A rear support bracket 146 is attached to the lower end portion of the cutting unit frame 23. A rear shaft core member 147 that is vertically oriented is supported below the rear support bracket 146, and a first driven sprocket 76, which will be described later, is rotatably supported by the rear shaft core member 147.

(First transfer device)
As shown in FIG. 2 to FIG. 6, the first transport device 71 includes a gripping transport mechanism 73 that grips and transports the planted crop stock side, and a mechanism that locks and transports the planted crop tip side. A stop transport mechanism 74 and a scraping mechanism 75 that scrapes the planted crop stock side are provided.

  The sandwiching and transporting mechanism 73 includes a right sandwiching and transporting part 73R and a left sandwiching and transporting part 73L. The right stock holding and conveying portion 73R includes a right drive sprocket 45R, a first driven sprocket 76, a second driven sprocket 77, and a right stock carrying that is wound around the sprockets 45R, 76, 77. A chain 78R. The left stock holding and transporting portion 73L includes a left drive sprocket 45L, a driven sprocket 79, a chain guide portion 80, and a left stock stock transport wound around the sprockets 45L and 79 and the chain guide portion 80. A chain 78L.

  The latch conveyance mechanism 74 includes a right latch conveyance portion 74R, a central latch conveyance portion 74C, and a left latch conveyance portion 74L. The right engaging / conveying portion 74 </ b> R includes a driving pulley 81, a driven pulley 82, and a belt 83 with a protrusion wound around the pulleys 81 and 82. The central locking conveyance portion 74 </ b> C includes a driving pulley 84, a driven pulley 85, and a protruding belt 86 wound around the pulleys 84 and 85. The left latching and conveying portion 74 </ b> L includes a driving pulley 87, a driven pulley 88, and a belt 89 with a protrusion wound around the pulleys 87 and 88.

  The scraping mechanism 75 includes a right scraping rotation packer 75R, a central scraping rotation packer 75C, and a left scraping rotation packer 75L.

  Power from the engine (not shown) is transmitted to the right drive sprocket 45R via the cutting shaft, the first transmission shaft 22, the second transmission shaft 24, and the third transmission shaft 26, and the right drive sprocket 45R rotates. . The right stock transport chain 78R is rotated by the rotation drive of the right drive sprocket 45R, and the second driven sprocket 77 is rotated. In conjunction with the rotation of the second driven sprocket 77, the drive pulley 81 and the right take-up rotation packer 75R rotate. The belt 83 with the protrusions is rotated by the rotational driving of the driving pulley 81.

  The engagement between the right take-up rotation packer 75R and the center take-up rotation packer 75C causes the center take-up rotation packer 75C and the drive pulley 84 to rotate in conjunction with the rotation of the right take-up rotation packer 75R. The belt 86 with protrusions is rotated by the rotation of the drive pulley 84.

  Power from the engine is transmitted to the left drive sprocket 45L via the cutting shaft, the first transmission shaft 22, the second transmission shaft 24, and the sixth transmission shaft 31, and the left drive sprocket 45L rotates. The left stock transport chain 78L is rotated by the rotational drive of the left drive sprocket 45L, and the driven sprocket 79 is rotated. In conjunction with the rotation of the driven sprocket 79, the drive pulley 87 and the left take-up rotation packer 75L rotate. The belt 89 with protrusions is rotated by the rotational drive of the drive pulley 87.

  The planted crop stock is changed from the winding portion of the second driven sprocket 77 (right transfer start end portion) to the winding portion of the first driven sprocket 76 (right transfer end portion) of the right stock transport chain 78R. To the tip end portion of the chain guide portion 80 (left transfer end portion) from the winding portion (left transfer start end portion) of the driven sprocket 79 in the left stock transport chain 78L. Is transported along the left transport path 90L until it joins the center side. The planted crop stock is scraped by the right take-up rotary packer 75R, the central take-up rotary packer 75C, and the left take-up rotary packer 75L, and is locked and conveyed by the belts 83, 86, 89 with protrusions. The

  Thereby, the 1st conveyance apparatus 71 is comprised so that a harvested crop may be merged to the center side, conveyed back, and delivered to the 2nd conveyance apparatus 72 located in the back of the 1st conveyance apparatus 71.

(Second transport device)
As shown in FIGS. 2 to 6, the second transport device 72 includes a sandwich transport mechanism 91 that sandwiches and transports the crop stock side, and a latch transport mechanism 92 that latches and transports the crop head side. It has. The pinch transport mechanism 91 includes a drive sprocket 93, a first driven sprocket 94, a second driven sprocket 95, and a stock transport chain 96 wound around the sprockets 93 to 95. The locking and conveying mechanism 92 includes a drive sprocket 97, a driven sprocket 98, and a chain 99 with a protrusion wound around the sprockets 97 and 98.

  The power from the engine is transmitted to the drive sprocket 93 via the cutting shaft and the seventh transmission shaft 70, and the drive sprocket 93 rotates. The stock transport chain 96 is rotated by the rotational drive of the drive sprocket 93. The drive sprocket 97 rotates in conjunction with the rotation of the drive sprocket 93. The projecting chain 99 is rotated by the rotational driving of the drive sprocket 97.

  A stock path of the planted crop from the winding portion (conveyance start end portion) of the second driven sprocket 95 to the winding portion (right conveyance end portion) of the first driven sprocket 94 in the stock transport chain 96 The tip of the planted crop is locked and conveyed by the chain 99 with a protrusion. Thereby, the 2nd conveying apparatus 72 is comprised so that a planted crop may be conveyed back upwards, and it may deliver to the feed chain 101 and the threshing apparatus 5 which are located in the back of the 2nd conveying apparatus 72.

(Right cover)
As shown in FIGS. 3, 5, and 6, in the right return path 148 </ b> R from the winding portion of the first driven sprocket 76 to the winding portion of the second driven sprocket 77 in the right stock transport chain 78 </ b> R, A right cover 149 is provided to cover the upper part and the rear part of the return path part from the winding part of the first driven sprocket 76 to the right drive sprocket 45R. The right end of the right cover 149 is connected to the vicinity of the right opening 47R formed between the bulging portion 46 and the channel member 43 in the right drive sprocket 45R, and the left end of the right cover 149 is connected to the rear side. A support bracket 146 is connected.

  Specifically, the right cover 149 includes an upper surface portion 149a and a rear side surface portion 149b, and is configured in a long shape with an L-shaped cross section. Inclined portions 149c are formed on both end sides of the upper surface portion 149a. The right inclined portion 149 c is placed and supported on the upper surface of the bulging portion 46. A first attachment member 151 is fixed to the front end portion on the right end side of the upper surface portion 149a. The first attachment member 151 includes a fixed portion that extends forward from the front end portion on the right end side of the upper surface portion 149a and an attachment portion that extends upward from the fixed portion, and has a substantially L-shaped cross section. The mounting portion of the first mounting member 151, the flange portions of the front case portion 42 </ b> A and the rear case portion 42 </ b> B, and the bent portion of the channel member 43 are fixed together by bolts 44. The left inclined portion 149 c is placed and supported on the upper surface of the rear support bracket 146. A rectangular plate-shaped second mounting member 152 is fixed to the upper end portion on the left end side of the rear side surface portion 149b. The second attachment member 152 extends laterally from the upper end portion on the left end side of the rear side surface portion 149b. The front end portion of the second mounting member 152 is bolted to the rear support bracket 146.

(Left cover)
Of the left return path 148L from the distal end portion of the chain guide portion 80 to the winding portion of the driven sprocket 79 in the left stock transport chain 78L, the return path portion from the distal end portion of the chain guide portion 80 to the proximal end portion A left cover 150 that covers the upper side and the rear side is provided. The middle portion of the left cover 150 is bolted to the rear end portion of the left support bracket 144, and the left end portion of the left cover 150 is formed between the bulging portion 46 and the channel member 43 in the left drive sprocket 45L. The right opening 47L is connected in the vicinity.

  Specifically, the left cover 150 includes an upper surface portion 150a and a rear side surface portion 150b, and is configured in a long shape with an L-shaped cross section. Inclined portions 150c are formed on both end sides of the upper surface portion 150a. A third attachment member 153 is fixed to the front end portion on the left end side of the upper surface portion 150a. The third attachment member 153 includes a fixed portion that extends forward from the front end portion on the left end side of the upper surface portion 150a and an attachment portion that extends upward from the fixed portion, and has a substantially L-shaped cross section. The mounting portion of the third mounting member 153, the flange portions of the front case portion 42A and the rear case portion 42B, and the bent portion of the channel member 43 are fixed together by bolts 44. The left inclined portion 150 c is placed and supported on the upper surface of the bulging portion 46. A fourth mounting member 154 is fixed to the front end portion on the right end side of the upper surface portion 150a. The distal end portion of the fourth mounting member 154 is bolted to the right side portion of the rear end portion of the left support bracket 144.

  As a result, it is possible to prevent straw scraps and the like from adhering to the upper surfaces of the return paths 148R and 148L in the right and left stock transport chains 78R and 78L. The harvested crops can be transported satisfactorily, for example, 78L can be transported to the right and left drive sprockets 45R, 45L, and can prevent straw scraps from being entangled with the right and left drive sprockets 45R, 45L.

  In addition, the right inclined portion 149c of the right cover 149 is placed and supported on the upper surface of the bulging portion 46, and the left inclined portion 149c is placed and supported on the upper surface of the rear support bracket 146. The right cover 149 is constructed over the bulging portion 46 and the rear support bracket 146, and the right cover 149 can be stably supported. In addition, there is no gap between the bulging portion 46 and the right cover 149, and it is possible to further prevent the waste scraps and the like from adhering to the upper surfaces of the return paths 148R and 148L in the right and left stock transport chains 78R and 78L. .

[Another embodiment]
(1) The right cover 149 may be omitted and only the left cover 150 may be provided, or the left cover 150 may be omitted and only the right cover 149 may be provided.

(2) Of the right return path 148R, in addition to the configuration in which the right cover 149 that covers the upper part of the return path portion from the winding portion of the first driven sprocket 76 to the right drive sprocket 45R is provided, the right return path Of 148R, an additional cover may be provided to cover the upper part of the return path portion from the right drive sprocket 45R to the winding portion of the second driven sprocket 77.

(3) Of the left return path 148L, in addition to the configuration in which the left cover 150 that covers the upper part of the return path portion from the distal end portion to the base end portion of the chain guide portion 80 in the left return path 148L is provided, You may provide the additional cover which covers the upper direction of the return path | route part from the base end part of the chain guide part 80 to the winding part of the driven sprocket 79. FIG.

(4) Instead of the configuration in which the upper collar 34 and the lower collar 35 are provided, only the upper collar 34 may be provided and the lower collar 35 may be omitted, or only the lower collar 35 may be provided and the upper collar 34 may be omitted. May be.

(5) The right and left covers 149 and 150 may be constituted by channel members having a U-shaped cross section, or may be constituted by a horizontally long flat bar.

(6) Instead of the configuration in which the substantially L-shaped first mounting member 151 is fixed to the front end portion on the right end side of the upper surface portion 149a of the right cover 149, the front end portion on the right end side of the upper surface portion 149a of the right cover 149 A flat plate-shaped first mounting member is fixed to the top, and the front end portion of the first mounting member, the flange portions of the front case portion 42A and the rear case portion 42B, and the bent portion of the channel member 43 are fastened together. May be. Alternatively, the front end portion on the right end side of the upper surface portion 149a of the right cover 149 is bent upward to form a first attachment member, and the front end portion of the first attachment member and the flanges of the front case portion 42A and the rear case portion 42B The part and the bent portion of the channel member 43 may be fastened together.

(7) Instead of the configuration in which the substantially L-shaped third attachment member 153 is fixed to the front end portion on the left end side of the upper surface portion 150a of the left cover 150, the front end portion on the left end side of the upper surface portion 150a of the left cover 150 A third mounting member having a flat plate shape facing upward and downward is fixed, and the mounting portion of the third mounting member, the flange portions of the front case portion 42A and the rear case portion 42B, and the bent portion of the channel member 43 are fixed together. May be. Alternatively, the front end portion on the left end side of the upper surface portion 150a of the left cover 150 is bent upward to form a third attachment member, and the tip end portion of the third attachment member and the flanges of the front case portion 42A and the rear case portion 42B The part and the bent portion of the channel member 43 may be fastened together.

(8) Instead of a configuration in which the fourth mounting member 154 is fixed to the front end portion on the right end side of the upper surface portion 150a, and the tip end portion of the fourth mounting member 154 is bolted to the right side portion of the rear end portion of the left support bracket 144. Then, the fourth attachment member may be fixed to the front end portion on the right end side of the upper surface portion 150a, and the distal end portion of the fourth attachment member may be bolted to the chain guide portion 80.

  INDUSTRIAL APPLICABILITY The present invention is applicable to various combine harvesters configured to join harvested crops to the center side and deliver them to a transport device.

12R, 12L Pulling device 23 Cutting part frame 25 Counter case 26, 31 Pulling transmission shaft 27R, 27L Transmission case 34, 35 Color
42A front case part (first case part)
42B Rear case part (second case part)
44 bolt (connector)
45R, 45L drive sprocket 47R, 47L Opening 72 Transport device 78R, 78L Stock transport chain 90R, 90L Transport path 148R, 148L Return path 149, 150 Cover

Claims (4)

A right and left stock transport chain that sandwiches and transports a stock of a harvested crop; and a transport device that is positioned behind the right and left stock transport chains; As the crops are transported along the transport path from the transport starting end to the transport terminating end and the transport path from the transport starting end to the transport terminating end of the left stock transport chain, the harvested crops join the center side. A combine harvester configured to be delivered to the transport device,
A right drive sprocket is provided on the return path from the transfer end to the transfer start end in the right stock transport chain, and covers the upper part of the return path from the right drive sprocket to the transfer end. A right cover , and
A left drive sprocket is provided on the return path from the transfer end to the transfer start end in the left stock transport chain, and covers the upper part of the return path from the left drive sprocket to the transfer end. Combine harvester with left cover. A right and left transmission case extending upward from a counter case extending in the left-right direction from the reaper frame and connected to the pulling device
Each of the right and left transmission cases is formed with an opening, and each of the right and left transmission cases is provided with a pulling transmission shaft ,
The right causing the transmission shaft, the right drive sprocket to be integrally rotated, is mounted facing to said right opening, said left causing transmission shaft, the left drive sprockets can rotate integrally Attached to the left opening ,
The right stocker transport chain is wound around the right drive sprocket while passing through the opening of the right transmission case, and the left stocker transport chain is passed through the opening of the left transmission case, It is configured to wind the left drive sprocket,
The harvesting of the combine according to claim 1, wherein an end of the right cover is attached in the vicinity of the opening of the right transmission case, and an end of the left cover is attached in the vicinity of the opening of the left transmission case. Department. In each of the right and left transmission cases, a portion to which the drive sprocket is attached is configured in a circumferentially divided manner composed of a first case portion and a second case portion,
The first case portion and the second case portion in the right transmission case are connected by a connector, and the right cover is connected to the right transmission case by the connector.
The first case portion and the second case portion in the left transmission case are connected by a connector, and the left cover is connected to the left transmission case by the connector. Combine harvester. The color that covers at least one directly above side and right under side of the right and left of each said drive sprocket of claim 2 or 3 are extrapolated to be idle with respect to the drive sprocket and the cause transmission shaft The harvester of the combine described in 1.

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