JP7178969B2 - combine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester that raises and lowers a reaping unit connected to a front part of a traveling machine body by a hydraulic cylinder.

2. Description of the Related Art There is known a combine harvester provided with a lowering stopper capable of restricting the lowering of a reaping part in a lifting operation state in which a hydraulic cylinder is extended and the reaping part is in a raised position (see, for example, Patent Document 1). The lowering stopper of Patent Document 1 is rotatable with the base end side as a fulcrum, and the free end side engages with the cylinder body of the hydraulic cylinder to restrict the lowering of the reaping portion. and a non-operating position that releases the engagement with and permits the reaping portion to descend.

Japanese Patent No. 5996039

However, the descending stopper of Patent Document 1 is pivotally connected through a pivotal connection shaft together with the piston rod to a connection bracket to which the piston rod of the hydraulic cylinder is pivotally connected through a pivotal connection shaft. Therefore, when installing or removing, the descent stopper must be handled together with the piston rod, which poses a problem in workability during installation and removal.

The present invention has been made in view of the actual situation as described above for the purpose of solving these problems. a hydraulic cylinder that is pivotally connected at both ends to the traveling body and the reaping part and moves the reaping part up and down by expansion and contraction; and a piston rod of the hydraulic cylinder provided in the reaping part. A connecting bracket that is pivotally connected, a pair of opposing pieces of the connecting bracket, and the piston rod that is positioned between the pair of opposing pieces are passed through the connecting bracket to pivotally connect the piston rod to the connection bracket, a pivotal connection shaft fixed to the connection bracket; and a lowering stopper capable of restricting the lowering of the reaping unit in a raising operation state in which the hydraulic cylinder is extended and the reaping unit is in a raised position; The stopper is rotatable about the base end side, and has an operating position where the free end side engages with the cylinder body of the hydraulic cylinder to restrict the descent of the reaping part, and a position between the free end side and the cylinder body. and a non-operating position where the engagement is released and the reaping portion is allowed to descend, and the base end side of the descent stopper is engaged with the engaged portion of the connection bracket or the pivotal connection shaft. It is characterized in that it has a notch portion to be engaged, and is pivotally operated with the engaged portion of the connection bracket or the pivotal connection shaft as a fulcrum.
Further, the invention of claim 2 is the combine harvester according to claim 1, wherein the notch is an engaged portion of the connection bracket or the Disengagement from the pivot connection shaft is restricted.
Moreover, invention of Claim 3 is a combine according to Claim 1 or 2, Comprising: The base end side of the said downward stopper is arrange|positioned between said pair of opposing pieces, It is characterized by the above-mentioned.
Further, the invention of claim 4 is the combine harvester according to any one of claims 1 to 3, wherein the engaged portion of the connection bracket is a boss portion, and the inner peripheral side of the boss portion It is characterized in that the pivotal connection shaft is inserted through and the notch is engaged with the outer peripheral side of the boss.

According to the invention of claim 1, the base end side of the descent stopper has the engaged portion of the connection bracket or the notch portion engaged with the pivotal connection shaft, and the engaged portion of the connection bracket, Alternatively, since it is rotated about the pivotal connecting shaft, it is not necessary to handle the lowering stopper together with the piston rod when attaching or detaching, and workability during attachment or detachment can be improved.
Further, according to the second aspect of the invention, the cutout portion is restricted from coming off from the engaged portion of the connection bracket or the pivotal connection shaft based on the abutment of the descent stopper against the piston rod. The number of parts can be reduced and the structure can be simplified as compared with the case where a retaining member is provided.
Further, according to the third aspect of the invention, the base end of the descent stopper is arranged between the pair of opposing pieces of the connecting bracket. Can be protected with a connecting bracket.
According to the fourth aspect of the invention, the engaged portion of the connection bracket is the boss portion, the pivotal connection shaft is inserted through the inner peripheral side of the boss portion, and the notch portion is engaged with the outer peripheral side of the boss portion. This not only prevents the descent stopper from wearing due to contact with the pivotal connection shaft, but also allows the descent stopper to be engaged (temporarily fixed) with the boss portion before the pivotal connection shaft is attached.

It is a side view of the combine concerning one embodiment of the present invention. It is a figure which shows the reaping part raising/lowering mechanism of the combine which concerns on one Embodiment of this invention, and is a principal part side view which shows the hydraulic cylinder for raising/lowering of a lowered state, and the lowering stopper of a non-action position. FIG. 2 is a view showing a reaping unit elevating mechanism of a combine harvester according to an embodiment of the present invention, showing a lifting hydraulic cylinder in a raised state, a lowering stopper in a non-operating position (solid line), and a lowering stopper in an operating position (virtual line); It is a part side view. It is a figure which shows the reaping part raising/lowering mechanism of the combine which concerns on one Embodiment of this invention, and is a principal part side view which shows the hydraulic cylinder for raising/lowering in a raised state, and the lowering stopper (cross section) of an operating position. 1 is an exploded perspective view of a main part showing a reaping part elevating mechanism of a combine according to an embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the reaping part raising/lowering mechanism of the combine which concerns on one Embodiment of this invention, (a) is a bottom view which shows the attachment state of only a downward stopper, (b) is a bottom surface which shows the attachment state of only the hydraulic cylinder for raising/lowering. FIG. (c) is a bottom view showing the mounting state of the lifting hydraulic cylinder and the descent stopper.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a combine harvester, and the combine harvester 1 includes a traveling machine body 2 and a reaping part 3 connected to the front part of the traveling machine body 2 so as to be able to move up and down. The traveling body 1 includes a threshing unit 4 for threshing and sorting grains from the culms harvested by the harvesting unit 3, a grain tank 5 for storing the sorted grains, and the grains in the grain tank 5. It is provided with a discharge auger 6 to be carried out of the machine, a post-processing part 7 to post-process threshed removed culms, a control part 8 on which a worker rides, and a crawler type traveling part 9. - 特許庁

As shown in FIGS. 2 to 6, a reaping unit elevating mechanism 10 for raising and lowering the reaping unit 3 is interposed between the traveling body 2 and the reaping unit 3 . The reaping unit elevating mechanism 10 has both ends pivotally connected to the traveling body 2 and the reaping unit 3, and is provided with an elevating hydraulic cylinder 11 for elevating the reaping unit 3 by extension and contraction. A connecting bracket 12 on the reaping part side to which the piston rod 11a of the cylinder 11 is pivotally connected, a pair of opposing pieces 12a and 12b of the connecting bracket 12, and a tip of the piston rod 11a located between the pair of opposing pieces 12a and 12b. A pivotal connection shaft 13 on the side of the reaping portion that passes through the portion and pivotally connects the piston rod 11a to the connection bracket 12, and a cylinder main body 11b of the lifting hydraulic cylinder 11 provided in the traveling body 2 are pivotally connected. A connecting bracket (not shown) on the traveling machine body side, a pivot connecting shaft (not shown) on the traveling machine body side that pivotally connects the cylinder main body 11b of the lifting hydraulic cylinder 11 to the connecting bracket, and a lifting hydraulic cylinder a descent stopper 14 capable of regulating the descent of the reaping portion 3 in the lifting operation state in which the reaping portion 3 is in the hoisting position with the reaping portion 11 extended; Prepare.

The lifting hydraulic cylinder 11 includes a cylinder body 11b and a piston rod 11a slidably fitted to the cylinder body 11b. to raise or lower the A shaft through-hole 11c through which a pivotal connection shaft of the traveling machine body passes is formed in the base end of the cylinder body 11b, and a pivotal connection shaft 13 of the reaping part passes through the tip of the piston rod 11a. A shaft through hole 11d is formed.

As shown in FIGS. 5 and 6, the reaper-side connection bracket 12 is formed of a pair of opposed pieces 12a and 12b and a pair of opposed pieces 12a and 12b, respectively. A pair of boss portions 12e and 12f extending in a direction toward each other from the pair of opposing pieces 12a and 12b and through which the reaping portion side pivotal connection shaft 13 is inserted on the inner peripheral side. And prepare.

As shown in FIGS. 5 and 6, the pivotal connection shaft 13 on the reaping portion side is connected to a shaft portion 13a passing through the pair of opposed pieces 12a and 12b and the piston rod 11a, and to the base end portion of the shaft portion 13a. It is integrally provided with a fixed plate portion 13b. After the shaft portion 13a is passed through the pair of opposing pieces 12a and 12b and the piston rod 11a, the fixing plate portion 13b superimposed on one of the opposing pieces 12a is fastened to the one of the opposing pieces 12a via the bolt B. The reaping part side pivotal connection shaft 13 is fixed to the reaping part side connection bracket 12 . The reaping part-side pivotal connection shaft 13 pivotally connects the piston rod 11a to the reaping part-side connection bracket 12. At this time, the piston rod 11a is positioned between the pair of bosses 12e and 12f. , the axial movement of the pivotal connection is restricted by a pair of boss portions 12e, 12f.

The descent stopper 14 is rotatable about the pivotal connection shaft 13 on the reaping part side at the base end side, and a rotation restriction state in which the free end side is locked by the stopper holder 15 to restrict rotation; Switching operation is performed to a rotation permitting state in which the locking by the stopper holder 15 is released and rotation about the pivot connection shaft 13 is permitted. Incidentally, the stopper holder 15 of this embodiment includes a holder bracket 15a provided on the reaping portion side, a pin 15b projecting downward from the holder bracket 15a, and an R pin (snap pin) engaged with the pin 15b. ) and the like. After the descent stopper 14 is rotated upward to insert the pin 15b into the locking hole 14a of the descent stopper 14, the locking device 15c is attached to the pin 15b, and the descent stopper 14 is locked by the locking device 15c. , the rotation of the lowering stopper 14 is restricted. Further, the rotation of the descent stopper 14 can be permitted by operating in the reverse order.

The descent stopper 14 is in an operating position where the free end side engages with the tip surface of the cylinder body 11b of the lifting hydraulic cylinder 11 to restrict the descent of the reaping portion 3 (retraction operation of the lifting hydraulic cylinder 11) when the reaping portion is raised. (see FIGS. 2 and 3) and a non-operating position (see phantom lines in FIG. 3 and FIG. 4) in which the engagement between the free end side and the tip surface of the cylinder body 11b is released to allow the reaping part 3 to descend. , and is rotated.

The descent stopper 14 of this embodiment is provided integrally with a stopper body 14b having a letter-shaped cross section that can be fitted to the piston rod 11a from above, and on the free end side of the stopper body 14b. An engaging member 14c that engages with the distal end face, a reinforcing member 14d integrally provided at the proximal end of the stopper body 14b, a pair of notches 14e and 14f formed at the proximal end of the stopper body 14b, Prepare.

The pair of cutouts 14e and 14f are engagement grooves formed to open upward on the base end side of the stopper body 14b, and engage with the pair of boss portions 12e and 12f of the connecting bracket 12 from below. be done. As a result, the descent stopper 14 is pivotally operated with the pair of boss portions 12e and 12f of the connection bracket 12 as fulcrums. According to such a descent stopper 14, since it is not necessary to handle the descent stopper 14 together with the piston rod 11a when attaching or detaching, workability during attachment or detachment can be improved.

In other words, if the descent stopper 14 does not have the cutouts 14e and 14f but has a through hole of the pivot connection shaft 13, when the pivot connection shaft 13 is assembled, the hole of the descent stopper 14 and the shaft through hole of the piston rod 11a are removed. 11d are aligned with the shaft through holes 12c and 12d of the connecting bracket 12, and the pivot connecting shaft 13 needs to be inserted through the lowering stopper 14 and the piston rod 11a at the same time. In this case, it becomes possible to assemble the descent stopper 14 at a timing different from the assembling of the pivot connecting shaft 13 . Specifically, as shown in FIG. 6(a), before the pivotal connection shaft 13 is assembled, the notch portions 14e and 14f are engaged with the boss portions 12e and 12f to temporarily fix the descent stopper 14. be able to.

In the temporarily fixed state, the free end side of the descent stopper 14 is locked by the stopper holder 15 . At this time, the cutouts 14e and 14f may come off from the bosses 12e and 12f. Since it is formed along the direction inclining with respect to the front, it maintains the state of engagement with the boss portions 12e and 12f even in the temporarily fixed state, and does not come off from the boss portions 12e and 12f.

The piston rod 11a is assembled to the connection bracket 12 with the descent stopper 14 temporarily fixed. Specifically, the shaft through hole 11d of the piston rod 11a is aligned with the shaft through holes 12c and 12d of the connecting bracket 12, and the shaft through holes 12c and 12d of the connecting bracket 12 and the shaft through hole 11d of the piston rod 11a are pivoted. The support connecting shaft 13 is inserted. At this time, the pivotal connection shaft 13 is inserted through the inner peripheral sides of the boss portions 12e and 12f, and the cutout portions 14e and 14f are engaged with the outer peripheral sides of the boss portions 12e and 12f. As a result, direct contact of the descent stopper 14 with the pivotal connection shaft 13 is restricted, and wear of the descent stopper 14 due to contact with the pivotal connection shaft 13 can be prevented.

After the piston rod 11a is assembled, the notch portions 14e and 14f are restricted from coming off from the boss portions 12e and 12f based on the contact of the lowering stopper 14 with the piston rod 11a. For example, at the non-operating position of the downward stopper 14, the base end of the stopper body 14b or a bent piece 14g formed at the base end abuts the piston rod 11a from above, thereby restricting the cutouts 14e and 14f from coming off. At the operating position of the downward stopper 14, the entire stopper body 14b abuts against the piston rod 11a from above, thereby restricting the notches 14e and 14f from coming off. According to such a descending stopper 14, the number of parts can be reduced and the structure can be simplified as compared with the case where a separate retaining member is provided.

Moreover, it is desirable that the base end side of the descending stopper 14 be arranged between the pair of opposing pieces 12a and 12b. By doing so, not only can the descent stopper 14 be configured compactly, but also the base end side of the descent stopper 14 can be protected by the connecting bracket 12 .

Further, the reaping unit elevating mechanism 10 of the present embodiment can also be used for a combine harvester that does not have the lowering stopper 14 . Specifically, as shown in FIG. 6B, the hydraulic cylinder 11 for lifting can be attached alone to the connecting bracket 12 on the reaping part side without attaching the lowering stopper 14 .

According to the present embodiment configured as described above, the traveling body 2, the reaping part 3 connected to the front part of the traveling body 2 so as to be able to move up and down, and both ends of the traveling body 2 and the reaping part 3 are pivotally supported. A lifting hydraulic cylinder 11 which is connected and moves the reaping part 3 up and down by extension and contraction, a connection bracket 12 which is provided in the reaping part 3 and to which a piston rod 11a of the lifting hydraulic cylinder 11 is pivotally connected, and a connection bracket 12. A pair of opposing pieces 12a and 12b and a piston rod 11a positioned between the pair of opposing pieces 12a and 12b are inserted through the connecting bracket 12 to pivotally connect the piston rod 11a and a pivot fixed to the connecting bracket 12. A support connecting shaft 13 and a lowering stopper 14 capable of restricting the lowering of the reaping unit 3 in a lifting operation state in which the lifting hydraulic cylinder 11 is extended and the reaping unit 3 is in a raised position. It is rotatable with the end side as a fulcrum, and the free end side engages with the cylinder body 11b of the lifting hydraulic cylinder 11 to restrict the descent of the reaping part 3, and the engagement between the free end side and the cylinder body 11b. The lowering stopper 14 has cutouts 14e and 14f that are engaged with the connecting bracket 12, Since the engaging portion is pivotally operated, there is no need to handle the lowering stopper 14 together with the piston rod 11a when attaching or detaching, and workability during attachment or detachment can be improved.

Moreover, the cutouts 14e and 14f are restricted from coming off from the connecting bracket 12 based on the abutment of the lowering stopper 14 against the piston rod 11a. The structure can be simplified.

Further, since the base end side of the descent stopper 14 is arranged between the pair of opposed pieces 12a and 12b, not only can the descent stopper 14 be configured compactly, but also the base end side of the descent stopper 14 can be protected by the connecting bracket 12. .

Also, the pivotal connection shaft 13 is inserted through the inner peripheral side of the boss portions 12e and 12f of the connection bracket 12, and the cutout portions 14e and 14f are engaged with the outer peripheral side of the boss portion, so that the descending stopper 14 is pivotally connected. Not only is it possible to prevent wear due to contact with the shaft 13, but it is also possible to engage (temporarily fix) the descent stopper 14 with the boss portions 12e and 12f before the pivotal connection shaft 13 is attached.

The present invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. For example, the cutouts 14e and 14f may be engaged with the pivot connection shaft 13 instead of the bosses 12e and 12f, or may be engaged with portions of the connection bracket 12 other than the bosses 12e and 12f.

Also, one of the pair of notches 14e and 14f may be a round hole. Even in this case, with the cutouts 14e and 14f engaged with one of the bosses 12e and 12f, the descent stopper 14 is moved in the axial direction of the bosses 12e and 12f to open the round hole. are engaged with the other boss portions 12e and 12f, the descent stopper 14 can be assembled to the boss portions 12e and 12f.

The stopper holder 15 of the above-described embodiment includes a holder bracket 15a provided on the reaping portion side, a pin 15b projecting downward from the holder bracket 15a, and a locking device 15c locked to the pin 15b. After rotating the descent stopper 14 upward to insert the pin 15b into the locking hole 14a of the descent stopper 14, the locking device 15c is attached to the pin 15b, and the locking device 15c is used to A pin is inserted from the lateral direction (direction perpendicular to the rotating direction of the descent stopper 14) into the locking hole formed in the side of the descent stopper 14, and the descent stopper 14 is locked by the pin. You may do so. In this way, the descent stopper 14 can be reliably locked compared to the above-described embodiment in which the descent stopper 14 is locked by the locking tool 15c.

1 Combine harvester 2 Traveling body 3 Reaping part 10 Reaping part lifting mechanism 11 Lifting hydraulic cylinder 11a Piston rod 11b Cylinder main body 12 Connection brackets 12a, 12b Opposing pieces 12c, 12d Shaft through holes 12e, 12f Boss part 13 Pivot connection shaft 14 Lowering Stopper 14b Stopper bodies 14e and 14f Notch 15 Stopper holder

Claims (4)

a running body,
a reaping unit connected to the front part of the traveling machine body so as to be able to move up and down;
a hydraulic cylinder whose both ends are pivotally connected to the traveling body and the reaping unit, and which raises and lowers the reaping unit by expansion and contraction;
a connection bracket provided in the reaping part and to which a piston rod of the hydraulic cylinder is pivotally connected;
A pivot that penetrates a pair of opposing pieces of the connecting bracket and the piston rod that is positioned between the pair of opposing pieces to connect the piston rod to the connecting bracket and that is fixed to the connecting bracket. a connecting shaft;
a descent stopper capable of regulating the descent of the reaper in a lifting operation state in which the hydraulic cylinder is extended and the reaper is in a raised position;
The descent stopper is rotatable about the base end side, and has an operating position where the free end side engages with the cylinder body of the hydraulic cylinder to restrict the descent of the reaper, and the free end side and the cylinder body. and a non-operating position in which the engagement with the
A base end side of the lowering stopper has a notch portion to be engaged with the engaged portion of the connection bracket or the pivot connection shaft, and the engagement portion of the connection bracket or the pivot connection shaft is provided. A combine that is rotatably operated with a fulcrum. 2. The notch is restricted from coming off from the engaged portion of the connection bracket or the pivotal connection shaft based on the abutment of the descending stopper against the piston rod. The combine as described. The combine according to claim 1 or 2, wherein the base end side of said lowering stopper is arranged between said pair of opposing pieces. The engaged portion of the connection bracket is a boss portion,
The pivotal connection shaft is inserted through the inner peripheral side of the boss portion,
The combine harvester according to any one of claims 1 to 3, wherein the cutout portion is engaged with the outer peripheral side of the boss portion.

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