JP3356953B2 - Pre-processing unit structure of combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a raising device and a cutting device acting on a planted grain stalk, which are slidably operable in a lateral direction of a traveling machine body between a re-cutting position and a middle splitting position. The transport end side of the grain culm transport device that inherits the culm and pinches and conveys it to supply it to the threshing feed chain is rotatably connected to the traveling machine around a first axis centered on the machine body side and a second axis centered on the machine body up and down. The present invention also relates to a combine pre-processing unit structure in which the grain culm conveying device is configured to swing up and down around the first axis to adjust the handling depth of the threshing device.

[0002]

2. Description of the Related Art In the above combine, even if the raising device and the reaping device are slid in the lateral direction of the machine body to switch between the re-cutting position and the middle-cutting position, the grain culm conveying device is moved around the second shaft center. Swing the machine laterally, and while moving the transport end side of this grain culm transport device to a position where it is easy to supply grain culm to the threshing feed chain, move the transport start end side to the harvested grain culm receiving point behind the reaper. Thus, the grain culm transport device can supply the harvested grain culm to the threshing device without any trouble. This makes it possible to set the raising device and the mowing device to the middle splitting work position, and to perform the middle splitting operation while easily avoiding stepping down the non-cutting target grain culm located on both sides of the cutting target culm by the traveling device. The cutting device and the cutting device are set to the re-cutting operation position, and the non-cutting target culm located on one lateral side of the cutting target culm is stepped down by the traveling device, or the traveling device is used to mud the uncut culm. It is also possible to perform the cutting operation while easily avoiding the problem.

[0003] Further, in both of the re-cutting and the splitting operations, the handling depth can be adjusted by swinging the grain culm conveying device around the first axis, and the culm height of the cut grain culm can be adjusted. Even if it changes, it is possible to work while adjusting the handling depth to one suitable for threshing.

[0004] In this type of combine, conventionally, as disclosed in Japanese Patent Application Laid-Open No. 5-153841, a lift arm that swings a culm conveying device to adjust a handling depth is provided;
The electric motor that drives the lift arm is located at a high level, and even if mud jumps out of the field, there is a type that can work while avoiding adhesion to the electric motor and the lift arm. Was.

[0005]

SUMMARY OF THE INVENTION In the conventional case described above,
The electric motor and the lift arm extend from the traveling machine body side to the upper end side of the elevating device, and are connected to the elevating transmission case for transmitting power to the elevating device. For this reason, the electric motor and the lift arm are exposed upward from the conveyance guide plate that guides the cereal culm conveyed by the cereal culm conveyance device, and the trouble that the tip side of the conveyed cereal stem comes into contact with the motor or the lift arm and is caught. It was easy to occur. In addition, even if the transport guide plate is large and an electric motor or a lift arm enters inside the transport guide plate, the transport guide plate is provided with a swelling portion that swells to the front side, so that the transport guide plate and the electric motor It was necessary to avoid contact with the stalks, and the bulging portion of the transport guide plate was likely to cause troubles that hindered the transport of the grain stalk. An object of the present invention is to make it possible to adjust the handling depth by an electric motor while making it easy to avoid adhesion of mud to an electric motor or the like and grain stalk transport obstruction caused by the motor.

[0006]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] A raising device and a cutting device acting on a planted grain culm are provided so as to be freely slidable in a lateral direction of a traveling machine body between a re-cutting work position and a middle splitting work position, and inherit the harvested grain culm and hold it. The culm conveying device that conveys the culm and feeds it to the threshing feed chain is rotatably connected to a traveling machine body around a first axis centered on the machine body side and a second axis centered on the machine body, and the culm carrier is conveyed. In the pre-processing unit structure of the combine, wherein the apparatus is configured to swing up and down around the first shaft center to adjust the handling depth in the threshing apparatus, an upper end of the apparatus raised from the traveling body side The lifting transmission case, which extends to the side and is connected to the lifting device for transmitting power to the lifting device, supports a vertically movable swing arm and an electric motor for swinging and driving the lift arm. The arm is configured to swing up and down around the first shaft center via a lift link hanging from the lift arm, and the swing shaft center of the lift arm and the electric motor are raised. It is arranged at a level lower than the upper edge of the transmission case.

[Operation] The electric motor and the lift arm are supported by the raised transmission case, and the swing shaft of the lift arm and the electric motor are positioned lower than the upper end edge of the raised transmission case. By having
Even when the electric motor or lift arm is installed at a position off the lower part of the cereal stalk transport guide plate, the scallop must be positioned at a high level so as to jump up from the field scene and to prevent muddy soil from adhering. It can be installed in such a manner that it does not enter the movement path on the tip side of the cereal culm conveyed by the conveying device and does not easily hinder cereal culm conveyance. Also, even when the electric motor or the lift arm is installed below the grain culm conveyance guide plate, the motor or the lift arm and the conveyance guide plate may contact each other even if the conveyance guide plate does not have a bulging portion into which the motor or the lift arm enters. It can be installed in such a state that it is located at an interval so as not to be separated from the field scene, and is located at a high level so as to jump upward from the field scene and to prevent muddy soil from adhering.

[Effect] The grain culm transfer device can be smoothly lifted and lowered by the electric motor, and it is easy to avoid the occurrence of failure or malfunction due to the attachment of soil or mud to the electric motor or the lift arm. In addition, since it is possible to avoid the occurrence of trouble in conveying the culm caused by the electric motor and the lift arm, it is possible to work efficiently while adjusting the depth of the cut culm accurately and reliably.

The invention according to claim 1 further includes the following configuration.
It has the following functions and effects.

[0011] (Structure) upper edge of the lifting arm is connected axis is the cause of the lift arm and the lift link in a state located in the raising limit for the swing control of the culms conveying device transmission case It is configured to be located near.

[Operation] Even when the lift arm reaches the upper limit, its free end is raised to be located near the upper end edge of the transmission case, and not only when the lift arm is at the lower operation position, but also at the upper side. The lift arm and the motor can be installed so as not to come into contact with the transported stalks or the stalk transport guide even in the operation position.

[Effect] Regardless of the operation position of the lift arm, the harvested culm can be smoothly transported and threshing can be efficiently performed.

The structure, operation and effect of the invention according to claim 2 are as follows.

[0015] [Structure] In the structure of the invention according to claim 1 , the mowing frame for supporting the mowing device and the mowing device is slidably connected to a support portion of the traveling body so as to be slidable in the machine body lateral direction. In addition, the mowing device can be laterally slid with respect to the traveling body.

[Operation] The mowing frame supporting the raising device and the mowing device is divided into a distal portion supporting the raising device and the mowing device, and a proximal portion connected to the supporting portion of the traveling machine body. By configuring the side portion to be slidable with respect to the base end portion, the raising device and the reaping device can be slid sideways between the re-cutting work position and the intermediate split work position. It is located at the tip side of the cutting frame, and the tip side of the cutting frame becomes heavy due to the slide structure, and troubles such as muddy water jumping up from the field and entering the slide portion easily occur. On the other hand, since the mowing frame slides between the supporting portion of the traveling body and the sliding section, which becomes a heavy object, is positioned on the traveling body side, and the sliding section is hardly muddy. The raising device and the mowing device can be slid sideways while positioned at a high level.

[Effect] The slide portion is located on the side of the traveling machine so that the front and rear weight of the entire combine can be well balanced, and the slide portion is less susceptible to muddy water and the like, and is unlikely to cause a failure or a slide defect. Can be used well.

The configuration, operation and effect of the invention according to claim 3 are as follows.

[Configuration] In the configuration of the invention according to claim 1 or 2 , the second configuration
The axis center is set to an inclined axis centered closer to the inside of the fuselage on the front side of the fuselage toward the higher level.

[Operation] The grain culm conveying device generally changes the posture of the conveyed grain culm to a sideways posture at the end of conveyance and supplies the culm to the threshing feed chain. And swinging in the lateral direction around the second axis of the inclined posture, and maintaining the posture in which the grain culm can be easily supplied to the threshing feed chain to smoothly supply the grain culm. To go.

[Effect] In both of the re-harvesting operation and the middle splitting operation, the thresh culm can be smoothly supplied to the threshing hood chain to efficiently thresh.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pre-processing unit 20 for causing planted grain culms such as rice and wheat and performing processing such as cutting is provided with a pair of left and right crawler-type traveling devices 1 and 2.
1 and connected to the front of a traveling body having a driving unit 2 so as to be able to swing up and down around an axis X in the lateral direction of the body, and handle the cut culm from the pre-processing unit 20. The traveling machine is provided with a threshing device 3 for performing threshing, a grain tank 4 for storing threshing grains, and a waste straw processing device 6 for shredding and bundling threshing waste straws, to constitute a combine.

As shown in FIGS. 2 to 7, a bearing holder 9 supported by one of a pair of right and left columns 8, 8 erected on a body frame 7 of the traveling body, and a bearing holder 9 supported by the other column 8. The transmission shaft 10 having the first shaft center X is rotatably mounted over the
A transmission shaft portion located between the two bearing holders 9, 9 serves as a first support portion 10a of the traveling body, and a base end portion 21a is connected to the first support portion 10a so as to be relatively rotatable and slidable. A cutting main frame 21; a plurality of weeding rods 22 extending forward from the distal end portion of the cutting main frame 21 and being arranged side by side in the fuselage; and one end of a base end 21a of the cutting main frame 21 A first raising transmission case 23 extending forward from the transmission case portion of the vehicle body; a vertical transmission case 24 having an upper end connected to a tip end of the first raising transmission case 23; An upper and lower cutting blade transmission case 25 connected to the lower end of the case 24 and the tip of the cutting main frame 21, and a tip of the cutting main frame 21; Of the second Pick transmission case 26 are erected next to one end, it is formed with cutting frame 27 of the preprocessing section 20. A plurality of side weeding tools 28a for weeding the planted grain culm into a culm to be cut and a non-cutting culm and introducing the culm to be cut into the raising path between the weeding rods 22 are provided. It is fixed to the tip side of the weeding rod 22 located on both lateral outer sides of the book weeding rod 22,
A center weeding tool 28b for weeding and introducing the culm to be cut into one and the other of the pair of left and right elevating paths is introduced to the tip of the weeding rod 22 located at the center of the plurality of weeding rods 22. And one of a pair of right and left pulling devices 29, 29 for raising and processing the culm to be cut from the weeding tools 28a, 28b by a raising claw 29a that moves upward, and The second raising transmission case 26 is attached to the upper end side of the second raising transmission case 26, and the other raising device 29 of the two raising devices 29 is connected to the weeding rod 22 and the front end of the first raising transmission case 26. A clipper-type cutting device 30 that cuts the root side of the planted grain stalk on which both raising devices 29, 29 are mounted,
A pair of left and right locking and conveying devices 31, 31 for gathering the harvested grain culm to a substantially central portion of the cutting device 30 in the lateral direction of the machine and sending it to the rear side of the machine, and both locking and conveying devices 31, 3.
The main frame 2 is composed of a pair of left and right rotating bodies 32, 32 for feeding the root side of the harvested culm from 1 to the rear side of the machine body.
1, a locking and transporting device portion 33a acting on the tip side of the locking and transporting device 31 and the cutting grain culm from the rotating body 32, and a clamping and transporting device portion 33 acting on the stock base side.
b, the paper is nipped and conveyed to the rear of the machine along the conveyance guide plate 34, and the posture is changed to a falling posture in which the tip side falls down inside the machine at the conveyance end side, and the threshing feed chain 3a of the threshing device 3 is conveyed. The grain culm conveying device 33 to be supplied to the start end is provided by the rotating body 32 and the threshing hood chain 3
The pre-processing unit 20 is arranged between the pre-processing unit 20 and a.

As shown in FIGS. 3 and 6, an elevating operation frame 36, which is positioned below the base end of the cutting main frame 21 so that the operation part 36a is in contact with the cutting main frame 21, is attached to the pair of columns 8 by a mounting shaft part 36b. , 8 are attached to each other, and the operation unit 36a and the body frame 7 are attached.
When the lift cylinder 37 attached is extended and retracted, the lifting operation frame 36 swings up and down with respect to the column 8 around the axis of the mounting shaft portion 36b due to the driving force of the lift cylinder 37, and is operated by the operating portion 36a. The cutting main frame 21 is configured to swing up and down with respect to the first support portion 10a. The slide feeder 38, which is positioned so that the base end side of the cutting main frame 21 is sandwiched between a pair of left and right pressing action portions 38a, 38a, is engaged with the feeder 38 so that a spiral ridge 39a feeds. An electric traverse motor 40, which is supported by the elevating operation frame 36 via a shaft 39 and an output unit 40 a is connected to the traverse shaft 39, is attached to the elevating operation frame 36. When the traverse motor 40 is driven, the traverse shaft 3
9 is configured to be driven in the forward rotation direction or the reverse rotation direction by the driving force of the transverse feed motor 40 to lock the slide operation tool 38 to the rotation preventing arm portion 38b of the operation tool 38, and to move the lifting / lowering operation frame The sliding operation tool 38 is moved in the lateral direction of the machine along the detent rod 41 attached to the 36, and the slide operation tool 38 slides the cutting main frame 21 along the first support portion 10a by the pressing action portion 38a. It is composed. Cutting main frame 21 is horizontal feed shaft 3
9, the operating portion 36 a of the elevating operation frame 36 can be brought into contact with the mowing main frame 21 to perform the elevating operation regardless of the stroke end on either the left side or the right side determined by the lateral feed stroke of the slide operation tool 38. The operation unit 36a is provided with a possible machine body lateral length.

As shown in FIG.
Input case 4 which is also used as a mounting member provided on the transport end side
2 is rotatably connected to a shaft end portion 10b protruding laterally outside the body from one bearing holder 9 of the transmission shaft 10, and as shown in FIGS. The mounting arm 43 extending from the carrier frame 33f on the start end side is connected to the first raising transmission case 23.
Is connected to the lower end of a lift link 45 that hangs down from a lift arm 44 supported by the lift arm. The input case 42 includes:
The above-mentioned locking and conveying device portion 33a and the holding and conveying device portion 3
3b is rotatably connected to a transfer device drive shaft 33e that drives the transfer endless rotation chains 33c and 33d, and the transfer device drive shaft 33e is connected to the transmission shaft 1e.
In the direction inclined with respect to the axis X of 0 as shown in FIG.
An axis Y is provided. As shown in FIG. 2, FIG. 3 and FIG. 5, a fixed side member 47a fixed to a support arm 46 extending from the carrier frame 33f at the transport start end side of the grain culm carrier 33, and this fixed side member The movable side member 47b slidably supported by the movable side member 47b constitutes a telescopic connecting member 47 on the grain culm transport device 33 side, and extends vertically through the connecting arm portion 47c of the movable side member 47b. A connecting member 48 on the cutting frame 27 side formed of a long arcuate guide rail is connected to the transmission case 24 of the cutting frame 27 and one of the pair of locking and conveying devices 31, 31. The movable side member 47b is configured to be able to slide along the connecting member 48. Thereby, the transport end side of the grain culm transport device 33 is moved by the input case 42 to the second support portion 10b, which is the shaft end portion of the traveling machine body, to the first lateral center of the machine body that is the same shaft center as the shaft center X. Around a second vertical axis Y, which is rotatable around X and which is in an inclined position, which is an axial center of the transporting device drive shaft 33e and which is located closer to the inner side of the fuselage on the front side of the fuselage toward a higher level. The transport start end side of the grain culm transport device 33 is rotatably connected to the cutting frame 27 by connecting members 47 and 48 so as to be relatively slidable in the vertical direction of the machine body and freely movable in the horizontal direction of the machine body. Connected to the lift arm 4
4 is suspended and supported via a lift link 45. Therefore, when the lift arm 44 is swung up and down, the whole grain culm transfer device 33 is swung about the first axis X with respect to the traveling machine body, and the start end of the transfer is connected to the connecting member 4.
Go up and down along 8. When the mowing frame 27 slides along the first support portion 10a, the entire grain culm transport device 33 swings around the second axis Y with respect to the traveling machine, and the transport start end moves in the machine lateral direction. I do. At this time, the connecting member 47 expands and contracts, and absorbs a change in the interval between the connecting point of the grain culm conveying device 33 to the second support portion 10b and the connecting point to the connecting member 48.

As a result, when the lateral feed motor 40 is operated, the cutting frame 27 is slid in the lateral direction of the body with respect to the first support portion 10a by the driving force of the lateral feed motor 40 as shown in FIGS. Weeding tools 28a, 28
b, raising device 29, mowing device 30, locking and conveying device 3
1 and the rotating body 32 can be slid in the lateral direction with respect to the traveling machine body, and regardless of the sliding movement, the transport starting end side of the grain culm transporting device 33 is a predetermined cutting grain behind the locking transporting device 31 and the rotating body 32. The grain culm transport device 33 can be swung with respect to the traveling machine body around the second axis Y so as to be located at the culm receiving point. Then, as shown in FIG. 7, when the cutting frame 27 is slid to the stroke end on the left side of the machine body and attached to the left side of the first support portion 10a, the weeding tools 28a and 28b, the raising device 29 and the cutting device 30 Is located at the reciprocating work position on the side opposite to the driving unit side of the traveling body, and as shown in FIG. 8, the cutting frame 27 is slid to the stroke end on the right side of the body and the first support portion 10a is moved. When mounted on the right side, the weeding tools 28a, 28b, the raising device 29, and the mowing device 30 are configured to be in the middle split work position closer to the operating unit 2 than the re-cutting work position.
When the weeding tools 28a and 28b, the raising device 29, and the cutting device 30 are set to any of the re-cutting position and the middle splitting position, the cutting frame 27 and the grain culm are operated by operating the lift cylinder 37. Transfer device 3
3 can be operated to swing up and down with respect to the traveling machine body around the axis X, and the pre-processing unit 20 can be moved downward in a position where the weeding tools 28a and 28b, the raising device 29 and the mowing device 30 are located near the ground, The weeding tools 28a, 28b, the raising device 29, and the mowing device 30 are switched to the ascending non-working position, which is far away from the ground.

As shown in FIGS. 3 and 5, the lift arm 44 is rotatable about a third axis Z of the support shaft 49 on a support shaft 49 attached to the first elevating transmission case 23. It is supported. A fan-shaped lift arm operating gear 50 is rotatably provided integrally with the mounting cylinder portion 44a of the lift arm 44 fitted externally to the support shaft 49, and the output gear 51a meshes with the lift arm operating gear 50 and there is no output change. As described above, the handling depth adjusting motor 51 composed of an electric motor configured to be driven at a constant rotation speed is attached to the first elevating transmission case 23 via the motor supporting member 52, and the lift arm 44 and the lift arm operation are operated. Spring hook pin 53 connected to gear 50
And a lifting spring 55 attached to a spring hook arm 54 provided at the base end 21a of the mowing main frame 21 so as to urge the lift arm 44 to swing in the lifting direction of the grain culm conveying device 33. . Thus, when the handling depth adjusting motor 51 is operated, the lift arm 44 is moved up and down around the third shaft center Z in the lateral direction of the body due to the driving force of the handling depth adjusting motor 51 and the operating force of the lifting spring 55. The swing operation is performed, and the transport start end side of the grain culm transport device 33 is moved up and down around the first axis X via the lift link 45. When this lifting operation is performed, the transport start end of the pinching transport device portion 33b of the cereal culm transport device 33 moves in the culm body direction with respect to the harvested grain culm supplied from the locking transport device 31 and the rotating body 32. Then, the grain stalk clamping position when the clamping and transporting device portion 33b receives and clips the harvested grain culm from the locking and conveying device 31 and the rotating body 32 changes. Then, when the grain stalk transport device 33 supplies the transported grain culm to the threshing feed chain 3a, the threshing feed chain 3
The position where a is received and clamped changes in the direction of the culm body, and the length of the harvested grain culm inserted into the handling room by the threshing feed chain 3a changes. Therefore, the grain culm conveying device 33 adjusts the handling depth of the threshing device 3 by swinging around the first axis X. This handling depth adjustment can be performed by operating the handling depth adjustment motor 51.

As clearly shown in FIG. 5, of the connecting members 47 on the grain culm conveying device 33 side, the connecting member main body composed of the fixed side member 47a and the movable side member 47b is connected to the lift link 45. It is arranged on the side where the grain stalk transport device 33 is located. Even when the grain culm transport device 33 is operated to be lifted, the lift link 45 is moved sideways so that the locking transport claw of the locking transport device portion 33a does not interfere with the connection point 44b between the lift arm 44 and the lift link 45. It is arranged in a state inclined in the direction.

As shown in FIGS. 2 and 3, a frame 33j provided in the grain culm transport device 33 supports the transport guide rails 33g and 33h of the locking transport device portion 33a and the nipping transport device portion 33b. Attach two culm length sensors 56a, 56b arranged in the direction of the culm of the transported grain culm, constitute a culm length detecting mechanism 56 for detecting the culm length of the cut culm by both culm length sensors 56a, 56b, and detect this culm length. A handling depth control mechanism 57 linked to a mechanism 56 is linked to the handling depth adjusting motor 51.

The two culm length sensors 56a and 56b are contact type sensors that make contact with the cereal culm at the front end portion of the conveying path where the cereal culm conveying device 33 conveys the cut culm along the conveying guide plate 34. I have. When both of the culm length sensors 56a and 56b come into contact with the grain culm, the culm length detection mechanism 56 detects that the culm length of the cut grain culm is longer than the standard length, and pinches and transports the culm length sensor 56a and 56b. When the culm length sensor 56a closer to the clamping and conveying device portion 33b contacts the cereal culm without the culm length sensor 56a having a greater distance from the device portion 33b coming into contact with the cereal culm, the culm height of the harvested cereal culm decreases. If both the culm length sensors 56a and 56b do not come into contact with the cereal culm, it is detected that the culm height of the cut culm is shorter than the standard length, and each detection result is converted into an electric signal. Output to the handling depth control mechanism 57. The handling depth control mechanism 57 inputs the detection result longer than the standard length from the culm length detection mechanism 56 to the ascending side of the grain culm transport device 33, and inputs the detection result shorter than the standard length from the culm length detection mechanism 56 to the cereal culm. Transfer device 3
3, the handle depth adjusting motor 51 is automatically rotated and operated, and when the culm length detecting mechanism 56 is in a standard length detection state, the handle depth adjusting motor 51 is stopped. It is. That is, the handling depth control mechanism 57
Controls the depth so that the tip of the transported grain culm passes between the culm length sensors 56a and 56b, the culm length sensor 56a is in a non-contact state, and the culm length sensor 56b is in a contact state.

As shown in FIG. 4, an input belt pulley 11 is provided at one end of the transmission shaft 10 so as to be rotatable integrally therewith, and rotational power from an engine (not shown) is transmitted to the transmission shaft 1.
0, the transmission shaft portion 10a of the transmission shaft 10 is integrally rotatably and slidably provided with a first output gear 60 and a transmission gear 61 meshing with the first output gear 60. A transmission shaft 62, which is provided inside the transmission case portion and to which the transmission gear 61 is integrally rotatably connected to one end side, is provided inside the first raising transmission case 23, and the first raising transmission is provided. The case 23 is configured to transmit the rotational power of the transmission shaft 10 to the right side raising device 29 by the transmission shaft 62. The rotating power of the transmission shaft 62 is first raised, and is transmitted from the transmission case 23 to the right rotating body 32, the right locking and conveying device 31, and the cutting device 30 via the transmission case 24 and the cutting blade transmission case 25. The rotational power of the right rotating body 32 is transmitted to the left rotating body 32 by the engagement of the left and right rotating bodies 32, 32, and the rotating power of the left rotating body 32 is transmitted to the left locking conveyance device 31. It is configured as follows. The output from the cutting blade transmission case 25 is secondly raised and transmitted to the left raising device 29 via the transmission case 26. A second output gear 63 provided on the shaft end portion 10b of the transmission shaft 10 so as to be integrally rotatable;
A transmission gear 64 meshed with the input case 4 and rotatably mounted integrally with the transfer device drive shaft 33e.
2 and is configured to transmit the rotational power of the transmission shaft 10 to the locking and conveying device portion 33a and the sandwiching and conveying device portion 33b, so that each device of the preprocessing unit 20 and the rotating body 3
2 is enabled.

That is, when performing the middle splitting operation, the cutting frame 27 is slid laterally by the lateral feed motor 40 toward the operation unit side and attached to the right end side of the first support unit 10a, and the weeding tools 28a, 28b, the raising device 29, reaper 30
To the working position. Then, as shown in FIG. 8, the crawler traveling device 1 is positioned at a position as far as possible from the non-cutting target culm b located on both lateral sides of the cutting target cereal stem a toward the cutting target cereal culm a, and the non-cutting Work can be performed while easily avoiding stepping down the target grain culm b by the traveling device 1. Then, when performing re-cutting work, the cutting frame 27 is slid laterally to the side opposite to the driving unit side by the lateral feed motor 40 and attached to the left side of the first support unit 10b, and the weeding tools 28a, 28b, the raising device 29, the cutting device 30 is set to the re-cutting work position. Then, as shown in FIG.
The crawler traveling device 1 is located as far away as possible, and the non-cutting target culm b on the uncut land is stepped down by the crawler traveling device 1 or the crawler traveling device 1 puts the mud on the uncut grain culm b. Work while making it easier to avoid And in any case,
The handling depth control mechanism 57 automatically controls the raising and lowering of the grain culm transport device 33 based on the information from the culm length detecting mechanism 56, and threshing processing with an appropriate handling depth even if the culm height of the cut grain culm changes. You can work while doing.

As shown in FIGS. 3 and 5, the third axis Z, which is the swing axis of the lift arm 44, and the handling depth adjusting motor 51 are first raised and the upper end of the transmission case 23 is moved. The support shaft 49 and the motor support member 52 are arranged at a lower level than the edge 23a. As shown in FIG. 9, the lift arm 44 is connected to the lift link 45 when the culm conveying device 33 reaches the ascending limit as the handling depth control mechanism 57 raises the cereal culm conveying device 33. The point 44b is first raised and becomes the operation position U located near the upper end edge 23a of the transmission case 23, and the lift arm 44 is connected to the lift arm 44 and the lift link 45 at an angle A. And lift link 4
5 is attached. That is, the lift arm 44 is vertically swung with the operation position U as the ascending limit. Then, even if the lift arm 44 reaches the upper limit U, the free end side is first raised so as not to protrude above the upper end edge 23a of the transmission case 23, or the connection point 44b is connected to the upper end edge 23a. Even if the free end side of the lift arm 44 projects above the upper edge 23a depending on whether it is located at the same level or at a level slightly higher than the upper edge 23a, it is necessary to make the projection slightly. As the culm conveying device 33 is operated to swing up and down, and even if the lift arm 44 reaches the upper limit U, the lift arm 44 and the lift link 45 do not reach an arrangement relationship overlapping in the lateral direction of the machine body, so that the handling depth is reduced. Adjustment motor 51
It is configured such that the raising / lowering operation of the cereal culm transport device 33 can be performed powerfully when the output intensity is increased. As a result, even if mud jumps from the field, the handling depth adjusting motor 51
And the front end side is used to adjust the handling depth adjustment motor 51 and the lift arm 44
Of the culm transport device 33 by the handling depth adjusting motor 51 while smoothly avoiding the movement of the harvested cereal culm transported by the cereal transport device 33. Can be adjusted.

In FIG. 7, W is a stroke for horizontally moving the cutting frame 27 in order to switch the raising device 29 and the cutting device 30 between the re-cutting work position and the middle split work position, and LE is the aforementioned stroke. This is a linear distance from a connection point 43a between the mounting arm 43 and the lift link 45 to the second axis Y.

As shown in FIG. 8, when the raising device 29 and the mowing device 30 are operated to the middle splitting operation position, the lift link 45 is configured to be located directly above the mowing main frame 21. is there. Accordingly, when a situation such as the lift arm 44 being lowered due to a failure occurs, the mowing main frame 21 receives and supports the grain stalk transport device 33 via the mounting arm 43. [Another Embodiment] FIG. 10 shows a grain culm conveying device 33 having another embodiment structure. That is, the chain guide plate 33m around which the endless rotation chain 33d for conveying the grain culm of the pinching and conveying device portion 33b is wound, and the locking and conveying device portion 3
A main frame F of the grain culm transport device 33 is formed by a pipe frame 33f having a support frame 33n for supporting 3a. One end of the pipe frame 33f is connected near the point where the support frame 33n is connected, and the other end is connected to the point of the pipe frame 33f where the chain sprocket support shaft 33k is connected. Stay S is connected to the pipe frame 3
In the case of 3f, the fixed side connecting member 47a of the telescopic connecting member 47 connected to the connecting member 48 and the mounting arm 43 connecting the lower end side of the lift link 44 are mounted on the stay S.

[Brief description of the drawings]

FIG. 1 is a side view of the entire combine.

FIG. 2 is a side view of a preprocessing unit.

FIG. 3 is a side view of a grain culm conveying device elevating control unit.

FIG. 4 is a cross-sectional view of a mowing frame mounting portion.

FIG. 5 is a cross-sectional view of a grain culm conveying device.

FIG. 6 is a plan view of a pre-processing unit elevating operation unit.

FIG. 7 is a plan view of the pre-processing unit in a cutting operation state.

FIG. 8 is a plan view of the pre-processing unit in a middle split operation state.

FIG. 9 is an explanatory view showing a lifted state of the lift arm.

FIG. 10 is a plan view of a grain culm transport device frame according to another embodiment.

[Explanation of symbols]

 Reference Signs List 3 threshing device 3a threshing feed chain 10a support portion 21a base end portion 23 Raised transmission case 23a Upper edge 27 Cutting frame 29 Raising device 30 Cutting device 33 Grain culm transfer device 44 Liftome 44b Connecting shaft core 45 Lifting link 51 Electric motor X 1 axis center Y 2nd axis center Z Swing axis center

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-330223 (JP, A) JP-A-5-153841 (JP, A) JP-A-64-120031 (JP, A) 37030 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01D 61/00 302

Claims (3)

(57) [Claims] 1. A raising device and a cutting device acting on a planted grain culm are provided so as to be freely slidable in a lateral direction of a traveling machine body between a re-cutting work position and a middle splitting work position, and inherit the harvested grain culm and hold and transport. And conveying the feed end side of the grain culm conveying device to be supplied to the threshing feed chain to the traveling machine so as to be rotatable around a first axis centered on the machine body side and a second axis centered on the machine body vertically, Is a pre-processing unit structure of a combine which is configured to be operated to swing up and down around the first shaft center to adjust the handling depth in the threshing device, An elevating transmission case that extends and connects to the upper end and elevates and transmits power to the elevating device, supports a vertically movable arm and an electric motor that swings and drives the lift arm,
The lift arm is configured to swing the culm conveying device up and down around the first axis through a lift link hanging down from the lift arm, and the swing axis of the lift arm and the electric motor are arranged. The lifting arm is disposed at a lower level than the upper edge of the transmission case, and the lift arm is used for swing control of the grain culm conveying device.
The lift arm and the
The shaft center connected to the shaft is raised and the upper end of the transmission case is raised.
The pre-processing unit structure of the combine that is configured to be located near the edge . 2. A laterally slidable connection of the raising device and the mowing device with respect to the traveling machine body by connecting a mowing frame supporting the raising device and the mowing device to a support portion of the traveling machine so as to be slidable in the lateral direction of the machine body. The pre-processing unit structure of a combine according to claim 1, which is enabled. 3. The pre-processing unit structure of a combine according to claim 1, wherein the second axis is set to an inclined axis located at a higher level on the inner side of the fuselage on the forward side of the fuselage.