JP2010130973A - Telescopic grain unloading auger for combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bring a telescopic grain unloading auger for combine harvesters, in which the screw part in the downstream side and the screw part in the upstream side of a transport screw extensively and contractively move with relative rotation by extensible movement of a top side transport cylinder to a base side transport cylinder, to be contractible without receiving troubles caused by residual grains and without generating loss of the residual grains. <P>SOLUTION: The screw part 40 in the downstream side of the transport screw is moved to be contracted by rotating the screw in the grain transport and discharge direction. A movable member 15 capable of switching a stored posture in which a storage chamber 98 for storing grains from a grain outlet 21a of the transport cylinder 21 on the top side is formed and a discharge posture in which a discharge path 97 for discharging grains from the grain outlet 21a of the transport cylinder 21 on the top side is formed is provided. The movable member 15 is automatically switched to the stored posture in a state of the contraction movement of the screw part 40 in the downstream side of the transportation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an expandable grain discharge auger for a combine, and more particularly, a front end side transfer cylinder is supported by a base end side transfer cylinder so as to be extendable and retractable, and the inside of the base end side transfer cylinder and the inside of the front end side transfer cylinder And a transport downstream screw part and a transport upstream screw part of the transport screw positioned over the base end of the transport screw are connected to each other so as to be capable of relative rotation and expansion and contraction movement. The present invention relates to a combine expandable grain discharge auger configured such that a screw section and the transport upstream screw section expand and contract while relatively rotating.

  The telescoping grain discharge auger described above can move the front end side transport cylinder relative to the base end side transport cylinder, so that the transport screw can handle the amount of expansion and contraction of the front end side transport cylinder by the expansion and contraction movement of the front end side transport cylinder. The length of the grain discharge auger is shortened or lengthened.

Conventionally, for example, there has been a horizontal auger 9 described in Patent Document 1 as this type of grain discharge auger. The lateral auger 9 described in Patent Document 1 includes a first case 23 (corresponding to a proximal-end-side transfer cylinder) and a second case 24 (front-end side) fitted in the first case 23 so as to be slidable in an expansion / contraction direction. And a first transport screw 20, a second transport screw 21, and a third transport screw 22 provided inside the first case 23 and the second case 24.
The first transport screw 20 and the second transport screw 21 include a first screw 40 located on the upstream side of the transport and a second screw 41 located on the downstream side of the transport of the first screw 40.
When the second case 24 moves to the upstream side of the first case 23 from the state in which the horizontal auger 9 is most extended, the first screw 40 of the first transfer screw 20 becomes the second screw 41 of the first transfer screw 20. The second screw 41 enters the second screw 41 while relatively rotating with respect to the second screw 41, while the first screw 40 of the second conveying screw 20 rotates relative to the second screw 41 of the second conveying screw 20. Get in.
When the second case 24 moves to the transport downstream side with respect to the first case 23 from the state in which the horizontal auger 9 is shortened most, only the second screw 41 of the first transport screw 20 moves to the transport downstream side, and the second transport Only the second screw 41 of the screw 21 moves to the conveyance downstream side. (Each symbol is described in the publication.)

JP 2008-167716 A (paragraphs [0020], [0025], [0045], [0046], [0051], [0061], [0062], FIGS. 3 to 10)

In the telescopic grain discharge auger described above, the screw blade on one of the transport downstream screw portion and the transport upstream screw portion of the transport screw enters between the screw pitches of the other screw blade, and the transport downstream screw portion and the transport screw Since the screw blades of the upstream screw portion are close to each other, the conveying screw is shortened.
Therefore, when the shortening operation is performed, if there is a grain remaining in the conveying cylinder and the residual grain may be clogged between the screw blades, the shortening may not be smooth or may not proceed. .

  An object of the present invention is to provide a combine expandable grain discharge auger that can be shortened without being damaged by residual grains and without causing loss of residual grains even if residual grains exist. There is.

According to the first aspect of the present invention, the distal transport cylinder is supported by the proximal transport cylinder so as to be extendable and retractable, and is transported downstream in the transport screw located between the proximal transport cylinder and the distal transport cylinder. A screw portion is connected to the upstream conveying screw portion so as to be relatively rotatable and telescopically movable, and the downstream conveying screw portion is moved relative to the upstream conveying screw portion by the expansion and contraction movement of the distal end side conveying tube with respect to the proximal end conveying tube. In the expandable grain discharge auger of the combine configured to expand and contract while rotating
It is configured to move in a shortened manner while rotating the conveying downstream screw portion in the grain unloading direction,
Switchable between a storage posture in which a storage chamber for storing the grain from the screw portion on the downstream side of the conveyance is formed and a discharge posture in which a discharge path for discharging the grain from the grain outlet of the tip side conveyance cylinder is formed. A movable member provided on the distal end side transfer cylinder;
Control means for automatically switching the movable member to the storage posture in the shortened movement state of the conveying downstream screw portion is provided.

According to the configuration of the first aspect of the present invention, even if there is residual grain in the transport cylinder, the residual grain is transported toward the grain outlet by the rotation of the transport downstream screw part in the grain unloading direction, and approaches the screw blades. The conveying screw can be shortened while avoiding the occurrence of grain clogging between the screw blades facing each other by reducing or eliminating the residual grain entering between them.
Even if the residual grain is transported toward the grain outlet by the transport downstream screw section, a storage chamber is formed by switching the movable member to the storage posture by the control means, and the transport downstream screw section is formed in this storage chamber. Grain from is stored.

  Therefore, when the discharge auger is switched to the shortened state, even if there is residual grain, the transport screw can be smoothly shortened to the shortened target position and switched quickly without being damaged by the residual grain. Moreover, the residual grain is stored in the storage chamber, and loss due to spilling of the grain can be prevented.

  In the second aspect of the present invention, a discharge tube provided in the front end side transfer tube is provided in communication with the grain outlet of the front end side transfer tube, and the movable member is a lid that opens and closes the discharge tube.

  According to the configuration of the second aspect of the present invention, the storage chamber can be formed using the discharge tube as the storage chamber forming means only by adding the lid.

  Therefore, what can prevent clogging and loss of residual grains at the time of shortening can be obtained at low cost from the viewpoint of forming the storage chamber.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a combine equipped with a telescopic grain discharge auger according to an embodiment of the present invention. FIG. 2 is a plan view of the combine equipped with the telescopic grain discharge auger according to the embodiment of the present invention. As shown in these drawings, this combine is configured to be self-propelled by a pair of left and right crawler type traveling devices 1, 1, and is provided below the driving section having the driving seat 2 and the driving seat 2. It has a self-propelled aircraft equipped with a prime mover having an engine E, a cutting portion 4 connected to the front portion of the aircraft frame 3 of the self-propelled aircraft, and a side of the self-propelled aircraft on the rear side of the aircraft frame 3 A threshing device 5 and a grain tank 6 provided side by side are provided, and a grain discharging device 8 having a vertical grain discharging auger 7 provided on the rear side of the grain tank 6 in a vertical direction is provided. Yes.

This combine harvests rice and wheat.
That is, in the cutting unit 4, when the cutting unit frame 4 a is vertically moved with respect to the body frame 3 by the lifting cylinder 9, the weeding tool 4 b located at the front end of the cutting unit 4 is lowered near the rice field. Are moved up and down and the ascending work state in which the weeding tool 4b is lifted high from the rice field. When the cutting unit 4 is in the descending work state and the self-propelled machine body is caused to travel, the cutting unit 4 is driven by the driving force from the engine E and harvests while raising the planted culm. The threshing device 5 is driven by the driving force from the engine E to thresh the harvested cereal meal from the harvesting unit 4. The grain tank 6 collects and stores the threshing grains from the threshing device 5.

  The grain discharging device 8 includes the vertical grain discharging auger 7 (hereinafter referred to as the vertical auger 7), and the conveying start end side is connected to the conveying end side of the vertical auger 7 via the upper relay case 10. A horizontal grain discharge auger 11 (hereinafter abbreviated as a horizontal auger 11) is provided.

  The conveyance start end side of the vertical auger 7 is connected to the bottom discharge screw 12 located in the bottom of the grain tank 6 via the lower relay case 13. The transport screw 7 a of the vertical auger 7 is interlocked with the bottom discharge screw 12 by an interlocking mechanism having a bevel gear positioned inside the lower relay case 13, and the transport screw 11 a of the horizontal auger 11 is positioned inside the upper relay case 10. It is interlocked with the conveying screw 7a of the vertical auger 7 through the interlocking mechanism 14 (see FIG. 4).

In other words, the grain discharging device 8 receives the grain stored in the grain tank 6 when the discharge clutch 12a (see FIG. 1) for turning on and off the transmission from the engine E to the bottom discharge screw 12 is turned on and operated. Discharge.
That is, when the discharge clutch 12a is engaged and operated, the bottom discharge screw 12 is driven, and the conveying screw 7a of the vertical auger 7 is driven by the driving force of the bottom discharging screw 12, and the transverse force is driven by the driving force of the conveying screw 7a. The conveying screw 11a of the auger 11 is driven. The grain discharged from the grain tank 6 by the bottom discharge screw 12 and sent to the lower relay case 13 is lifted by the vertical auger 7 and sent to the upper relay case 10. It is laterally fed by the auger 11 and discharged from the discharge cylinder 15 provided at the tip of the transport cylinder 11b of the horizontal auger 11. At this time, the grain discharge location can be illuminated by a work lamp 16 (see FIGS. 1 and 6) provided outside the discharge cylinder 15.

  The grain discharging device 8 includes a turning operation mechanism 17 (see FIGS. 1 and 2) provided across the conveying cylinder 7b and the lower relay case 13 of the vertical auger 7, a cylinder bracket and a horizontal auger included in the conveying cylinder 7b of the vertical auger 7. 11 is provided with an elevating cylinder 19 (see FIGS. 1 and 2) connected to a connecting shaft 18 included in the 11 transport cylinders 11b. A turning motor 17a included in the turning operation mechanism 17 is driven, and the elevating cylinder 19 is driven. , Change the grain discharge point.

  That is, when the turning motor 17a is driven, the vertical auger 7 is turned with respect to the lower relay case 13 by the turning operation mechanism 17 driven by the turning motor 17a, and the horizontal auger 11 is turned together with the vertical auger 7. The discharge cylinder 15 pivots around the pivot axis of the vertical auger 7.

  When the lifting cylinder 19 is driven, the horizontal auger 11 is swung up and down with respect to the vertical auger 7 by the driving force of the lifting cylinder 19, and the discharge cylinder 15 is moved up and down around the swing axis of the horizontal auger 11. To do.

Next, the horizontal auger 11 will be described.
FIG. 3A is a longitudinal sectional view of the horizontal auger 11 in the most extended state. FIG. 3B is a longitudinal sectional view of the horizontal auger 11 in the most shortened state. 4 to 6 are detailed longitudinal sectional views of the horizontal auger 11 at positions A to C in the state of FIG. 7 and 8 are detailed longitudinal sectional views of the horizontal auger 11 at positions D and E in the state of FIG. 3B.

  As shown in these drawings, the transport cylinder 11b of the horizontal auger 11 is composed of a base-end-side transport cylinder 20 having a circular cross section in which the transport upstream end is connected to the upper relay case 10, and the discharge cylinder 15 is transported. And a distal end side transfer cylinder 21 having a circular cross section provided at the downstream end.

  The front end side transport cylinder 21 is supported by the base end side transport cylinder 20 so as to be freely extended and contracted in a state of being fitted on the base end side transport cylinder 20. As shown in FIG. 4 and FIG. 12, the front end side transport cylinder 21 is provided with three guide rollers 22 and 23 provided in a distributed manner in the peripheral direction of the transport cylinder at the upstream end of the transport. The distal-side conveyance cylinder 21 is configured such that the guide rollers 22 and 23 are brought into contact with the outer peripheral surface of the proximal-side conveyance cylinder 20 and roll, so that the axis of the distal-side conveyance cylinder 21 and the shaft of the proximal-side conveyance cylinder 20 It expands and contracts with the core aligned. Each guide roller 22, 23 is rotatably supported by a stay 24 fixed to the leading end side transport cylinder 21 via a support shaft pin 25. One of the three guide rollers 22, 23 rolls while engaging with a non-rotating rail 26 fixed to the outer peripheral surface of the base end side transport cylinder 20, and thereby the front end side transport The cylinder 21 is expanded and contracted in a state in which the rotation with respect to the proximal end side conveyance cylinder 20 is prevented.

  The conveying screw 11 a of the horizontal auger 11 is internally provided across the proximal end side conveying cylinder 20 and the distal end side conveying cylinder 21. The transport screw 11a includes a transport upstream screw unit 30 (hereinafter referred to as an upstream screw unit 30) positioned on the transport upstream side and a transport downstream screw unit 40 (hereinafter referred to as a downstream side) positioned on the transport downstream side. The screw portion 40 is referred to).

  The upstream screw portion 30 includes a cylindrical shaft shaft 31 having a transport upstream end positioned inside the upper relay case 10, and an upstream screw blade 32 that is rotatably supported by the screw shaft 31. The downstream screw blades 33 are located downstream of the upstream screw blades 32 and supported by the downstream end of the screw shaft 31 on the downstream side.

  As shown in FIG. 4, the screw shaft 31 of the upstream screw portion 30 includes a connecting shaft 36 that is connected to the inner side of the upstream end of the conveyance thereof via a connecting member 34 and a connecting pin 35 so as to be integrally rotatable. And is connected to a bevel gear 14a of the interlock mechanism 14 located in the upper relay case 10 via a connecting shaft 36 so as to be integrally rotatable.

  As shown in FIG. 5, the downstream end of the screw shaft 31 in the upstream screw part 30 is connected to the arm 37a of the holder 37 provided at the downstream end of the base end transfer cylinder 20 with a bearing and a connecting cylinder. 38 is rotatably supported via 38.

  The upstream screw blade 32 of the upstream screw portion 30 is fixed to the screw shaft 31 so as to be integrally rotatable over the entire length. The downstream screw blade 33 of the upstream screw part 30 includes an attachment cylinder 39 that is connected to the upstream end of the conveyance so as to be integrally rotatable, and is attached to the screw shaft 31 via the attachment cylinder 39 and the connection cylinder 38. It is connected so that it can rotate integrally. The downstream screw blade 33 is wound around a cylindrical shaft 41 of the downstream screw 40. However, the screw shaft 41 and the downstream screw blade 33 are separated from each other with a predetermined distance and are not connected.

  The downstream screw portion 40 includes the screw shaft 41 and includes a screw blade 42 wound around a conveyance downstream portion of the screw shaft 41. The screw blade 42 is fixed to the screw shaft 41 so as to be integrally rotatable over the entire length.

The outer diameter of the screw shaft 41 of the downstream screw portion 40 is smaller than the inner diameter of the screw shaft 31 of the upstream screw portion 30. As shown in FIG. 6, the downstream end portion of the screw shaft 41 in the downstream screw portion 40 is rotatably supported by a holder 43 provided at the distal end portion of the distal end side transfer cylinder 21 via a bearing.
That is, the screw shaft 41 of the downstream screw part 40 corresponds to the downstream screw blade 33 of the upstream screw part 30 as the distal end side transfer cylinder 21 is operated to expand and contract with respect to the base end side transfer cylinder 20. In a state where the portion is fitted in the screw shaft 31 of the upstream screw portion 30, the portion is expanded and contracted with respect to the screw shaft 31. At this time, when the screw shaft 41 of the downstream screw portion 40 is rotated, the screw blade 42 of the downstream screw portion 40 rotates on the downstream screw blade 33 of the upstream screw portion 30 while rotating on the downstream side. It goes in and out between the screw pitches of the screw blades 33. When the screw shaft 41 of the downstream screw portion 40 moves short relative to the screw shaft 31 of the upstream screw portion 30, the screw blade 42 of the downstream screw portion 40 is transported upstream of the screw shaft 41 of the downstream screw portion 40. Downstream screw blades rotating in the grain unloading direction (rotation direction for conveying the grain toward the discharge cylinder 15) by the action of the guide mechanism 50 provided across the side end and the screw shaft 31 of the upstream screw part 30. Enter between 33 screw pitches.

  A space between the screw shaft 41 of the lower screw portion 40 and the mounting cylinder 39 is sealed by a dust seal 39 a provided at an end of the mounting cylinder 39.

  As shown in FIG. 5, the guide mechanism 50 is provided in the guide key 51 connected to the transport upstream end of the screw shaft 41 of the downstream screw portion 40 and the screw shaft 31 of the upstream screw portion 30. The guide shaft 52 is provided.

  As shown in FIG. 7, the guide shaft 52 is arranged concentrically with the axis of the screw shaft 41 of the downstream screw portion 40. The guide shaft 52 is connected to the screw shaft 31 of the upstream screw portion 30 so as to be integrally rotatable via a connecting body 53 that is externally fitted to the upstream end portion of the conveyance, and is connected to the downstream screw portion. When the screw shaft 41 of the 40 is expanded and contracted with respect to the screw shaft 31 of the upstream screw portion 30, the guide shaft with respect to the guide shaft 52 in a state where the screw shaft 41 of the downstream screw portion 40 is externally fitted to the guide shaft 52. 52 moves in the axial direction.

  FIG. 15 is a longitudinal sectional view of the guide mechanism 50. 16 is a cross-sectional view taken along the line XVI-XVI in FIG. As shown in these drawings, the guide key 51 includes a cylindrical key body 54 that is externally fitted to the guide shaft 52 so as to be rotatable and slidable relative to the guide shaft 52, and a guide projecting from the inner peripheral surface of the cylindrical key body 54. The protrusion 55 and a plurality of connecting protrusions 56 are provided on the outer peripheral surface side of the cylindrical key body 54 so as to protrude in a distributed manner in the circumferential direction of the cylindrical key body 54. The guide protrusion 55 and each connecting protrusion 56 are integrally formed with the cylindrical key body 54.

The cylindrical key body 54 is fitted into an assembly hole of a key support portion 44 provided by connecting a cylindrical body to the end of the screw shaft 41 of the downstream screw portion 40 so as to be integrally rotatable. Each connection protrusion 56 is engaged with the rotation stopper recess 44 a of the key support portion 44. A retaining ring 57 attached to the key support portion 44 prevents the end surface of the cylindrical key body 54 from coming off.
That is, the guide key 51 is supported by the key support portion 44 so as to rotate integrally with the screw shaft 41 with respect to the guide shaft 52 and to move integrally with the screw shaft 41 with respect to the guide shaft 52. .
The guide protrusion 55 is slidably engaged with a spiral guide groove 52 a provided on the peripheral surface of the guide shaft 52.

Accordingly, the guide mechanism 50 pushes and moves the screw shaft 41 of the downstream screw portion 40 when the distal end side transport cylinder 21 is moved to the shortened movement side with respect to the proximal end side transport cylinder 20. The guide key 51 is operated to move to the upstream side of the conveyance with respect to the guide shaft 52, and the guide protrusion 55 is guided by the spiral guide groove 52a to move to the upstream side of the conveyance, whereby the screw shaft of the downstream screw portion 40 is moved. 41 is guided so as to move to the shortened movement side and rotate with respect to the screw shaft 31 of the upstream screw portion 30.
Thereby, the guide mechanism 50 guides the screw blade 42 of the downstream screw portion 40 so as to enter the screw pitch of the downstream screw blade 33 of the upstream screw portion 30 while rotating in the grain unloading direction. .

When the distal end side transport cylinder 21 is moved to the extension movement side with respect to the proximal end side transport cylinder 20, the guide mechanism 50 pulls the screw shaft 41 of the downstream screw section 40 and operates to move the distal end side transport cylinder 21. When the guide key 51 is moved to the transport downstream side with respect to the guide shaft 52, the guide projection 55 is guided by the spiral guide groove 52a and moved to the transport downstream side, so that the screw of the downstream screw portion 40 is moved. The shaft 41 is guided to rotate while moving to the extension movement side with respect to the screw shaft 31 of the upstream screw portion 30.
Thereby, the guide mechanism 50 seems to come out between the screw pitches of the downstream screw blades 33 of the upstream screw portion 30 while rotating the screw blades 42 of the downstream screw portion 40 in the direction opposite to the grain carrying-out direction. To guide.

  Further, when the upstream screw portion 30 is driven so that the driving force of the vertical auger 7 is transmitted by the interlock mechanism 14 and the grain is carried out by the interlock mechanism 14, the guide shaft 50 is driven by the screw of the upstream screw portion 30. Driven by the shaft 31 and transmitting the driving force of the guide shaft 52 to the screw shaft 41 of the downstream screw portion 40 via the guide key 51, the downstream screw portion 40 and the upstream screw portion 30 are allowed to carry out the grain unloading. Drive to rotate in the direction of rotation.

  As shown in FIG. 9, the horizontal auger 11 is expanded and contracted with an electric motor 61 (hereinafter referred to as an expansion / contraction motor 61) that is positioned outside the upstream end of the base end side transfer cylinder 20. A drive mechanism 60 is provided.

  FIG. 9A is a plan view of the telescopic drive mechanism 60 in the extended operation state. FIG. 9B is a plan view of the telescopic drive mechanism 60 in a shortened operation state. FIG. 10A is a side view of the telescopic drive mechanism 60 in the extended operation state. FIG. 10B is a side view of the telescopic drive mechanism 60 in a shortened operation state. FIG. 11 is a side view of a portion of the lateral auger 11 where the telescopic drive mechanism 60 is disposed. 12 is a cross-sectional view taken along the line XII-XII in FIG. 13 is a cross-sectional view taken along XIII-XIII in FIG. FIG. 14 is a cross-sectional plan view of the telescopic drive mechanism 60. As shown in these drawings, the expansion / contraction drive mechanism 60 is provided across the upstream end of the upstream side transport cylinder 21 and the upstream end of the proximal end transport cylinder 20. In addition to the telescopic motor 61, the telescopic drive mechanism 60 includes a chain support member 62 supported at the upstream end of the transport of the base end side transport cylinder 20, and the chain support member 62 has the chain transport member 21. An endless rotating chain 63 supported along the direction of expansion and contraction is provided, and a connecting body 64 in which a roller 63a positioned at a part of the endless rotating chain 63 and the upstream end of the transport cylinder 21 are connected. It is configured with.

  The chain support member 62 includes a connection member 65 detachably connected to a pair of support portions 20 a, 20 a provided at the upstream end portion of the base end side transfer cylinder 20 by a connection bolt, and a pair of connection members 65 connected to the connection member 65. A rail member 66 having one end connected through connecting bolts 65a and 65a is provided.

  The telescopic motor 61 is supported by the connecting member 65 via a speed reducer 67 fixed to the connecting member 65 by a connecting bolt. The speed reducer 67 includes a drive sprocket 68 that is connected to the output shaft of the speed reducer 67 so as to be integrally rotatable. The speed reducer 67 receives the drive force in the forward rotation direction and the reverse rotation direction output from the telescopic motor 61 and decelerates. To drive the drive sprocket 68.

  The endless rotating chain 63 is supported by the drive sprocket 68 and the end of the rail member 66 opposite to the side connected to the connecting member 65 through a support shaft 69 so as to be freely rotatable. It is wound around the sprocket 70. Thereby, the endless rotation chain 63 is in a state of being rotatably supported by the chain support member 62 and rotates in a direction along the direction of expansion and contraction of the front end side transport cylinder 21.

  FIG. 17 is a perspective view of the coupling body 64 in an exploded state. As shown in FIG. 11 and FIGS. 11, 12, and 14, the connecting body 64 includes a connecting shaft 71 fixed to the outer surface side of the transport upstream end of the front end side transport cylinder 21, and a front end portion 71 a of the connecting shaft 71. And a connecting plate 72 that is externally fitted.

  The connecting plate 72 is non-rotatably connected to the connecting shaft 71 by the non-circular outer peripheral shape of the distal end portion 71 a of the connecting shaft 71. The connecting plate 72 is prevented from coming off by a retaining screw 73 attached to the connecting shaft 71. The connecting plate 72 includes three connecting claws 72 a arranged in the longitudinal direction of the endless rotating chain 63, and each connecting claw 72 a is engaged between the rollers of the endless rotating chain 63. The roller 63a of the chain 63 is connected so as to be movable together.

  Therefore, the connecting body 64 connects the roller 63a as the chain constituent body of the endless rotating chain 63 and the transport upstream end of the front end side transport cylinder 21 so as to be movable together.

That is, when the expansion / contraction motor 61 is driven, the expansion / contraction drive mechanism 60 drives the endless rotating chain 63 in the forward rotation direction or the reverse rotation direction via the speed reducer 67 and the drive sprocket 68 by the expansion / contraction motor 61. The connecting body 64 is pulled and moved by the tension side portion of the tension side portion and the slack side portion generated in the rotating chain 63. When the endless rotation chain 63 is driven in the forward rotation direction, the connecting body 64 is pulled and moved by the tension side portion generated in the endless rotation chain 63, and the endless rotation chain 63 is driven in the reverse rotation direction. In this case, the direction in which the connecting body 64 is pulled and moved by the tension side portion generated in the endless rotating chain 63 is opposite to the direction.
As a result, the expansion / contraction drive mechanism 60 rotates the endless rotation chain 63 in the normal rotation direction or the reverse rotation direction by the driving force of the expansion / contraction motor 61 when the expansion / contraction motor 61 is driven in the normal rotation direction or the reverse rotation direction. When the connecting body 64 is pulled and moved by the endless rotating chain 63, the distal end side transport cylinder 21 is moved in the extension movement direction corresponding to one of the forward rotation direction and the reverse rotation direction of the endless rotation chain 63. The endless rotating chain 63 is moved in a shortened moving direction corresponding to the other of the forward rotation direction and the reverse rotation direction.

  As shown in FIGS. 12, 14, and 17, the connecting body 64 includes a ring body 74 that is rotatably supported on the base end side of the connecting shaft 71. The ring body 74 is positioned at a predetermined position with a set interval with respect to the connection plate 72 by the action of a ring-shaped spacer 75 externally fitted to the connection shaft 71. The chain support member 62 includes a pair of guide portions 66 a and 66 a provided on the rail member 66 so as to be in contact with the circumferential surface of the ring body 74 and to perform a guide action.

  That is, the guide portion 66a of the chain support member 62 is brought into contact with the ring body 74 to guide the connecting body 64 so as to move between the pair of guide portions 66a and 66a. The connecting body 64 and the endless rotating chain 63 are prevented from coming off due to a shift in the circumferential direction of the front end side transport cylinder 21 with respect to the chain support member 62.

  Accordingly, the lateral auger 11 is driven to drive the telescopic motor 61 so that the telescopic driving mechanism 60 is operated and is switched to the shortened state by the telescopic driving mechanism 60 so that the entire length of the horizontal auger 11 can be stored. Alternatively, it is switched to the extended state by the telescopic drive mechanism 60, and the discharge work can be performed with the full length of the horizontal auger 11 being increased.

  That is, when the bottom discharge screw 12 is stopped and the telescopic motor 61 is driven in the forward rotation direction or the reverse rotation direction, the endless rotating chain 63 is driven by the telescopic motor 61 to pull and move the coupling body 64. The distal end side transport cylinder 21 is operated to extend or shorten with respect to the proximal end side transport cylinder 20. When the endless rotating chain 63 is driven in one of the forward rotation direction and the reverse rotation direction, the distal end side transfer cylinder 21 is extended and moved, and the transfer cylinder 11b is cut into the extended state (the state shown in FIG. 3A). In other words, when the endless rotating chain 63 is driven in the other of the forward rotation direction and the reverse rotation direction, the front end side transport cylinder 21 is operated to be shortened, and the transport cylinder 11b is shortened (state shown in FIG. 3B). Switch to.

  When the front end side transport cylinder 21 is shortened and moved (moving to the upstream side of the transport), the downstream side screw part 40 is pushed by the front end side transport cylinder 21 to the upstream side of the transport, so that the downstream side screw part 40 The screw shaft 41 moves to the transport upstream side (shortening movement side) with respect to the screw shaft 31 of the upstream screw portion 30, and the guide key 51 is guided by the spiral guide groove 52a of the guide shaft 52, whereby the downstream screw. The screw shaft 41 of the portion 40 rotates with respect to the screw shaft 31 of the upstream screw portion 30, and the screw blades 42 of the downstream screw portion 40 rotate in the grain unloading direction and remain inside the distal end side conveyance cylinder 21. Even if there is a grain, the tip of the residual grain is not clogged between the screw blade 42 of the downstream screw part 40 and the downstream screw blade 33 of the upstream screw part 30. Entering between the screw pitch of the grain outlet 21a downstream screw blade 33 of the upstream screw section 30 moves in the transport upstream side while conveying toward a (see FIG. 6) of the transfer cylinder 21. When the shortened movement distance of the front end side conveyance cylinder 21 reaches the movement distance L (see FIG. 3B) and the conveyance cylinder 11b as the entire horizontal auger is in the most shortened state, the screw blades 42 of the downstream screw section 40 The whole enters between the screw pitches of the downstream screw blades 33 of the upstream screw portion 30, and the transport screw 11 a as the entire horizontal auger is switched to the most shortened state (the state of FIG. 3 (b)).

  When the distal transfer cylinder 21 is extended (moved downstream), the downstream screw section 40 is pulled to the downstream transfer position by the distal transfer cylinder 21, so that the downstream screw section 40 The screw shaft 41 moves to the transport downstream side (extension movement side) with respect to the screw shaft 31 of the upstream screw portion 30, and the guide key 51 is guided by the spiral guide groove 52a of the guide shaft 52, whereby the downstream screw. The screw shaft 41 of the portion 40 rotates with respect to the screw shaft 31 of the upstream screw portion 30, and the screw blades 42 of the downstream screw portion 40 are carried out to the downstream screw blade 33 of the upstream screw portion 30. While rotating in the direction opposite to the direction, it moves to the downstream side of the conveyance and exits between the screw pitches of the downstream screw blades 33 of the upstream screw portion 30. When the extension movement distance of the front end side conveyance cylinder 21 reaches the movement distance L and the conveyance cylinder 11b as the entire horizontal auger is in the most extended state, almost the entire screw blade 42 of the downstream side screw part 40 is in the upstream side screw part 30. The conveying screw 11a as a whole horizontal auger is switched to the most extended state (the state shown in FIG. 3B).

  As shown in FIGS. 11 and 14, the pair of connection bolts 65 a and 65 a that connect the connection member 65 of the rail support member 62 and the rail member 66 constitute a connection adjustment mechanism 80. The connection adjusting mechanism 80 includes the pair of connection bolts 65a and 65a, a rail operation member 81 connected to the rail member 66 via the pair of connection bolts 65a and 65a, and a fixed fixed to the connection member 65. And an adjustment screw shaft 83 mounted over the fixing member 82 and the rail operation member 81.

  The connection adjustment mechanism 80 releases the tightening and fixing of the rail member 66 to the connection member 65 by the pair of connection bolts 65 a and 65 a, and adjust members 84 and 84 including a pair of nuts attached to the adjustment screw shaft 83. Is rotated, the connecting position of the rail member 66 with respect to the connecting member 65 is changed in the moving direction of the endless rotating chain 63.

  That is, when the pair of adjustment members 84 and 84 are rotated, the adjustment screw shaft 83 is moved with respect to the fixed member 82 by the feed operation by the adjustment member 84, and the rail operation member 81 is moved. The pair of connecting bolts 65a and 65a are moved and operated by the rail operating member 81 along the bolt holes 85 provided in the connecting member 65 in the chain moving direction to move the rail member 66 relative to the connecting member 65.

  As shown in FIG. 6, the front end side conveyance cylinder 21 includes a lid 90 provided inside the discharge cylinder 15. The lid 90 is supported so as to be able to swing open and close around the axis of the support shaft 91, and an open / close arm 93 by an electric motor 92 (hereinafter referred to as an open / close motor 92) provided outside the discharge cylinder 15. Is switched between an open state and a closed state by the swinging operation of.

  The opening / closing motor 92 is supported by the discharge cylinder 15 via a speed reducer 94 and is interlocked with the opening / closing arm 93 via the speed reducer 94.

  6 and 18 (a) show the opening operation state of the lid 90. FIG. As shown in these drawings, when the open / close motor 92 swings the open / close arm 93 downward and the positioning pin 95 provided on the open / close arm 93 is positioned at the lower end of the guide groove 96, the open / close arm 93 is It becomes the opening operation position, and the lid 90 is in the opening posture by the downward swing due to its own weight. The lid 90 in the open posture forms a discharge path 97 inside the discharge cylinder 15 by switching the discharge cylinder 15 to the open state. The discharge path 97 communicates with the grain outlet 21 a of the front end side transport cylinder 21 and discharges the grain output from the grain outlet 21 a of the front end side transport cylinder 21 from the discharge cylinder 15.

  FIG. 8 and FIG. 18B show the closing operation state of the lid 90. As shown in these drawings, when the open / close motor 92 swings the open / close arm 93 upward and the positioning pin 95 of the open / close arm 93 is positioned at the upper end of the guide groove 96, the lid 90 is moved to the open / close arm 93. It will be in a closed posture by pushing up with. The lid 90 in the closed posture forms a storage chamber 98 inside the discharge cylinder 15 by switching the discharge cylinder 15 to the closed state. The storage chamber 98 stores the grain conveyed by the downstream screw part 40 that is operated to be shortened so as not to exit the discharge cylinder 15.

  As shown in FIG. 8, the opening / closing motor 92 is linked to the control means 100, and this control means 100 is linked to the drive circuit 101 of the extension motor 61 and the extension detection mechanism 102 of the lateral auger 11.

  The control means 100 is configured using a microcomputer. The control means 100 inputs operation information of the telescopic motor 61 from the drive circuit 101, detects that the downstream screw unit 40 is in a shortened movement state or a stopped state based on this input information, and detects from the expansion / contraction detection mechanism 102. Information is input and based on this input information, it is detected that the horizontal auger 11 is in a shortened state or an extended state.

  When the control unit 100 detects that the downstream screw unit 40 is in the shortened movement state, the control unit 100 controls the open / close motor 92 to the close side based on the detection result, thereby switching the lid 90 to the closed posture. At this time, the control unit 100 determines that the lid 90 is in the closed posture based on the detection information by the detection switch 103 (see FIG. 18) that detects the switching of the open / close arm 93 to the raised position (closed operation position). Detect that. When the control means 100 detects that the lateral auger 11 is in the shortened state, the control means 100 maintains the lid 90 in the closed posture.

  When the control means 100 detects that the horizontal auger 11 is in the extended state, the control means 100 controls the opening / closing motor 92 to open based on the detection result, thereby maintaining the lid 90 in the open posture. At this time, the control means 100 has opened the lid 90 based on information detected by the detection switch 104 (see FIG. 18) that detects the switching of the open / close arm 93 to the lowered position (opening operation position). Detect that.

  Therefore, when the horizontal auger 11 is switched to the shortened state, residual grain is present in the front end side transport cylinder 21, and the grain of the screw blades 42 of the downstream screw part 40 in which the residual grain is operated to be shortened. Even if it is conveyed toward the grain outlet 21a by the rotation in the grain carrying-out direction and exits from the grain outlet 21a, the control means 100 operates the lid 90 in the closed position so that the lid 90 is stored in the storage chamber 98. , And the grain from the grain outlet 21 a is stored in the storage chamber 98 and is not dropped from the discharge cylinder 15. Thereafter, when the self-propelled machine is traveling or working, if the lateral auger 11 is maintained in a shortened state, the control means 100 maintains the lid 90 in the closed position, and the lid 90 is A storage chamber 98 is formed, and the grains stored in the storage chamber 98 are not dropped from the discharge cylinder 15.

As shown in FIG. 6, the control means 100 is linked to a discharge clutch check mechanism 110.
When the lateral auger 11 is switched to the shortened state, the control means 100 automatically activates the discharge clutch check mechanism 110 based on information detected by the expansion / contraction detection mechanism 102 so that the discharge clutch check mechanism 110 enters the discharge clutch 12a. Disable operation. That is, when the lateral auger 11 is switched to the shortened state, the downstream screw blades 33 of the upstream screw portion 30 located above the discharge port of the discharge cylinder 15 cannot be driven.

  FIG. 19 is a plan view of the expansion / contraction detection mechanism 102. As shown in this figure and FIGS. 9 and 12, the expansion / contraction detection mechanism 102 includes a rotary potentiometer 106 supported by a stay 105 fixed to the upstream end of the transport of the front end side transport cylinder 21, and a base end side transport cylinder 20. And a detection target rail 107 provided on the outer peripheral surface of the motor.

  The rotary potentiometer 106 includes a detection arm 108 attached to the rotary operation shaft 106a so as to be rotatable integrally therewith, and a contact detection unit 109 provided with a roller attached to the tip of the detection arm 108. The contact detection unit 109 contacts the detection target body rail 107 by the return turning force of the rotation operation shaft 106a.

  When the front end side transport cylinder 21 is operated to expand and contract, the rotary potentiometer 106 moves together with the front end side transport cylinder 21, and when the front end side transport cylinder 21 is positioned at the stroke end of the extension movement, the contact detection unit 109 detects the detection target rail 107. The detection arm 108 is swung to the operation position corresponding to the detection target portion 107a, and the rotation operation shaft 106a is rotated. When the front end side transport cylinder 21 is positioned in front of the shortened movement stroke end, the contact detection unit 109 comes into contact with the detection target portion 107b of the detection target rail 107, and the detection arm 108 swings to the operation position corresponding to the detection target portion 107b. It is operated to rotate the rotation operation shaft 106a. When the front end transport cylinder 21 is positioned at the stroke end of the shortening movement, the contact detection unit 109 comes into contact with the detection target portion 107c of the detection target rail 107, and the detection arm 108 swings to an operation position corresponding to the detection target portion 107c. Then, the rotation operation shaft 106a is rotated.

  Therefore, the expansion / contraction detection mechanism 102 detects that the horizontal auger 11 has reached the maximum extension state when the contact detection unit 109 comes into contact with the detection target location 107a, and the lateral detection when the contact detection unit 109 comes into contact with the detection target location 107b. It is detected that the auger 11 is in the shortest shortened state in the shortest state, and the contact detection unit 109 detects that the horizontal auger 11 is in the shortest shortened state by contacting the detection target portion 107c, and rotates each detection result. The potentiometer 106 outputs an electrical signal to the control means 100.

  FIG. 20 is a vertical cross-sectional side view of the front end side transport cylinder 21 having another implementation structure. The front end side transport cylinder 21 includes a discharge cylinder 15 rotatably mounted on the downstream end of the transport, and a posture switching mechanism 110 equipped with an electric motor 111 supported by the front end side transport cylinder 21. .

  In addition to the electric motor 111, the posture switching mechanism 110 includes a ring gear 112 provided on the discharge cylinder 15 so as to be integrally rotatable. A pinion gear 113 meshed with the ring gear 112 is supported on the output shaft of the electric motor 111 so as to be integrally rotatable.

  When the electric motor 111 is driven, the posture switching mechanism 110 switches the discharge cylinder 15 between a discharge posture and a storage posture by a pinion gear 113 driven by the electric motor 111.

  The posture switching mechanism 110 automatically switches the discharge cylinder 15 to the discharge posture in the extended state of the horizontal auger 11 by the control of the electric motor 111 by the control means 100, the shortened movement state of the downstream screw portion 40 and the horizontal auger 11. In the shortened state, the discharge cylinder 15 is automatically switched to the storage posture.

  FIG. 20A shows the discharge posture of the discharge cylinder 15. As shown in this figure, when the discharge cylinder 15 is switched to the mounting force extending downward from the front end side conveyance cylinder 21, the discharge cylinder 15 assumes a discharge posture. The discharge cylinder 15 in the discharge posture forms a discharge path 97 in which the opening of the discharge cylinder 15 communicates with the grain outlet 21a of the front end side transport cylinder 21 and exits from the grain outlet 21a of the front end side transport cylinder 21. The grain is discharged from the discharge cylinder 15.

  FIG. 20B shows the storage posture of the discharge cylinder 15. As shown in this figure, when the discharge cylinder 15 is switched to the mounting posture extending upward from the front end side conveyance cylinder 21, the discharge cylinder 15 assumes a storage posture. The discharge cylinder 15 in the storage posture is stored inside the front end side transport cylinder 21 by closing the grain outlet 21a of the front end side transport cylinder 21 by the portion 15a fitted on the front end side discharge cylinder 21 of the discharge cylinder 15. A chamber 98 is formed. The storage chamber 98 stores the grains that have reached the grain outlet 21 a that has been carried out by the downstream screw unit 20 that has been shortened and moved so as not to exit the discharge cylinder 15.

Combine side view Top view of the combine Overall longitudinal section of horizontal auger Longitudinal sectional view showing the detailed structure of part A in a state where the horizontal auger is extended Longitudinal sectional view showing the detailed structure of part B in a state where the horizontal auger is extended Longitudinal sectional view showing the detailed structure of part C in a state where the horizontal auger is extended Longitudinal sectional view showing the detailed structure of part D in a state where the horizontal auger is shortened Longitudinal sectional view showing the detailed structure of part E in a state where the horizontal auger is shortened Plan view of telescopic drive mechanism and telescopic detection mechanism Side view of telescopic drive mechanism Side view at the part where the expansion and contraction drive mechanism of the horizontal auger is arranged XII-XII cross-sectional view of FIG. XIII-XIII cross-sectional view of FIG. Cross-sectional plan view of telescopic drive mechanism Longitudinal section of guide mechanism XVI-XVI cross-sectional view of FIG. The perspective view in the decomposition state of a connection object Rear view of lid operation structure Plan view of expansion / contraction detection mechanism Longitudinal side view of the tip-side transfer cylinder with another implementation structure

Explanation of symbols

11a Conveying screw 15 discharge cylinder (movable member)
20 proximal end transport cylinder 21 distal transport cylinder 21a grain outlet 30 transport upstream screw section 40 transport downstream screw section 90 lid (movable member)
97 Discharge path 98 Storage chamber 100 Control means

Claims (2)

The distal end side transfer cylinder is supported by the proximal end side transfer cylinder so as to be freely extended and contracted,
A transport downstream screw portion and a transport upstream screw portion in a transport screw located over the inside of the base end side transport tube and the inside of the distal end side transport tube are connected so as to be relatively rotatable and telescopically movable,
Combined telescopic grain discharge auger configured to expand and contract while the transport downstream screw portion and the transport upstream screw portion rotate relative to each other by expansion and contraction of the distal end transport tube with respect to the proximal transport tube. Because
It is configured to move in a shortened manner while rotating the conveying downstream screw portion in the grain unloading direction,
Switchable between a storage posture in which a storage chamber for storing the grain from the screw portion on the downstream side of the conveyance is formed and a discharge posture in which a discharge path for discharging the grain from the grain outlet of the tip side conveyance cylinder is formed. A movable member provided on the distal end side transfer cylinder;
A telescopic grain discharge auger for a combine, comprising control means for automatically switching the movable member to the storage posture in a shortened movement state of the conveying downstream screw portion.   The expansion / contraction of the combine according to claim 1, further comprising: a discharge cylinder provided in the front end side transfer cylinder in communication with a grain outlet of the front end side transfer cylinder, wherein the movable member is a lid that opens and closes the discharge cylinder. Type grain discharge auger.

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