JP4704865B2 - Combine - Google Patents

Description

  The present invention relates to a riding combine.

  The rice-type combine harvester is mainly composed of a traveling machine body equipped with a crawler and a cutting part arranged in front of it so that the height can be changed. The traveling machine body is equipped with an engine and threshing. Part and Glen tank. On the other hand, the cutting unit includes a weeding body, a scraping chain with a tine attached thereto, a cutter, and the like, and power is transmitted to the cutting unit from an engine provided in the traveling machine body.

  As a structure for attaching the cutting part to the traveling machine body so that the height can be adjusted, generally, the cutting part is attached to a second cylinder extending in the front-rear direction in a plan view, and the second cylinder is rotated up and down around the rear end part. It is attached to the traveling machine body so as to move, and further, the portion on the near side of the first fulcrum with respect to the rotation fulcrum is attached to the traveling machine body so as to be vertically rotated around the rear end in the longitudinal direction. It is connected to the front end of the hydraulic cylinder (front end of the piston rod), and the cutting part is moved up and down by rotating the second cylinder with the hydraulic cylinder.

  The power is transmitted to the cutting part through the rotation of the second drive shaft arranged inside the second cylinder, and the left and right laterally long first cylinder is fixed to the second cylinder. A first drive shaft is disposed inside the first cylinder, power is transmitted from the first drive shaft to the second drive shaft via a bevel gear, and further, a belt is connected to the first drive shaft via a belt. Power from the engine is transmitted.

And, for the convenience of maintenance inspection and repair of the reaping part and the threshing part, the reaping part can be horizontally rotated toward the outside of the traveling machine body (that is, can be opened and rotated). In Patent Documents 1 and 2, as a mechanism for horizontally rotating the reaper, a first cylinder (horizontal cylinder) covering the first drive shaft is attached to a vertical support shaft provided in the traveling machine body so as to be horizontally rotatable. It is described. That is, conventionally, the first cylinder in which the first drive shaft is built is also used as a support member for the cutting part.
Japanese Patent No. 3529327 JP 2004-16111 A

  When the mowing part is opened and rotated, the mowing part becomes a cantilever state, but since the mowing part has a considerable weight, a large moment acts on the support portion. In this regard, it is conceivable to provide wheels that are grounded in the state of being opened and rotated in the cutting part. However, if wheels (or casters) are provided in this way, maintenance work is required on the field or on unpaved roads. There is a problem that it is difficult to deal with when this occurs.

  Therefore, in order to be able to open and rotate the cutting part without providing supporting wheels, both publications require that the first cylinder and the bearing part for the first cylinder have a very sturdy structure. In particular, since the axial length of the portion where the first cylindrical body and the bearing portion are fitted to each other is limited, the stress due to the moment is concentrated on the bearing portion. Not only is it necessary to make the members such as the cylinder, the bearing, and the vertical support shaft have a sturdy structure, but the members such as the first cylinder are originally limited in form, so there is a limit even if it is made a sturdy structure. For this reason, for example, when a downward load is applied to the cutting part for some reason during the operation of opening and turning the cutting part, there is a problem that the member may be damaged or deformed.

  An object of the present invention is to solve such a problem.

In order to solve the above-mentioned problems, the invention of claim 1 includes a traveling machine body having a cockpit and a threshing portion and mounted with an engine, and a cutting unit disposed in front of the traveling machine body. A vertical support shaft in a standing posture is erected on a portion near the left end of the section, and the cutting portion rotates horizontally around the axis of the vertical support shaft and opens and rotates toward the outside of the traveling machine body. in obtaining Combine, a first cylindrical body of the machine body transverse direction sideways like, provided with a second cylindrical body supporting the said reaper vertically swingably about the axis of the first cylindrical body, the first An elevating hydraulic cylinder that drives and oscillates the second cylindrical body over a predetermined oscillating range around the axis of one cylindrical body , and the interlocking between the elevating hydraulic cylinder and the second cylindrical body can be released freely. configured, swings own one end of the body width direction of the first cylindrical body with vertical axis around Comprising a bracket device for supporting the said first cylindrical body and said bracket device is provided so as to rotate integrally in a state releasing the interlocking of the lifting hydraulic cylinder and the second tubular member, prior to and cutting working posture located in front of the serial traveling machine body, across the open position for opening the front of the traveling machine body, in the vertical axis around the reaper and the posture changeable supporting, the reaper A stopper is provided to hold the mowing part in the middle of a predetermined swinging range when the posture is changed around the longitudinal axis of the first cylinder, and the front of the machine body rather than the lateral axis of the first cylinder said second cylindrical body portion spaced side, the over the bracket device sites distant downward from the transverse axis of said bracket device, and characterized by being configured to bridging the stopper in an oblique direction To do.

  According to invention of Claim 1, even if it does not provide the wheel for grounding in a cutting part, a cutting part can be supported stably in an open state.

  Further, the bracket device can further improve the support strength by avoiding the concentration of load.

  The bracket device can be made light and excellent in strength by using widely used pipe materials.

  Next, an embodiment of the present invention will be described with reference to the drawings.

(1). Outline of First Embodiment FIGS. 1 to 10 show the first embodiment. This embodiment is applied to a 4 type mowing riding combine. FIG. 1 is an overall perspective view of a combine. First, an outline will be described with reference to FIG.

  The combine includes a traveling machine body 1 having a crawler 2 and a cutting unit (pre-processing unit) 3 disposed in front of the traveling machine body 1 so as to be adjustable in height, and the traveling vehicle body 1 and the cutting unit 3 constitute a vehicle body. ing. An open-type cockpit (control area) 4 is formed in the right part of the substantially front half of the traveling machine body 1, and a threshing section 5 is arranged on the left side of the cockpit 4. A Glen tank 6 is provided behind 4. Reference numeral 7 denotes an auger.

  A cockpit (chair) 8 is provided in the cockpit 4, a handle 10 is disposed in front of the cockpit 4 in the traveling body 1 via a front column 9, and on the left side of the cockpit 4, An operation unit 11 is provided which is provided with levers for switching travel speeds and working states. A side cover 12 is disposed on the right side of the cockpit 4.

  The operation unit 11 includes a main transmission lever for selecting a main transmission mode to be used at the time of cutting work, an auxiliary transmission lever for selecting an auxiliary transmission mode to be used at the time of traveling on the road, a lever for raising and lowering the cutting unit 3, Lever such as a lever for driving the auger 7 is arranged.

  The cutting unit 3 includes a scraping chain (not shown), a cutter (not shown), and the like to which a front cover 13, a weed body 14, and a tine 15 are attached.

  As shown in FIG. 2, the cutting unit 3 can be horizontally rotated (turned) to the outer side opposite to the cockpit 4 around the left end rear end. A structure for horizontally rotating the harvesting part 3 (in other words, a structure for attaching the harvesting part 3 to the traveling machine body 1) will be described with reference to FIG.

(2). Outline of attachment structure and drive system of cutting part Next, the attachment structure of the cutting part 3 and the outline of the power transmission mechanism will be described based on the skeleton diagram of FIG. The power transmission mechanism for the cutting unit 3 is the same as that of the prior art, and is fixed to the first drive shaft 18 and the first cylinder 17 built in the first cylinder 17 in a concentric posture as shown in FIG. The second cylinder 19 and the second cylinder 19 are provided with a second drive shaft 20 incorporated in a concentric posture with the second cylinder 19. The first drive shaft 18 is connected to the machine body side output shaft 23 via a pulley 21 and a belt 22. Power is transmitted from. A rotational force is transmitted from the first drive shaft 18 to the second drive shaft 20 via the bevel gear 24.

  The cutting unit 3 includes a laterally long third drive shaft 25 as a drive system, and rotational force is transmitted from the second drive shaft 20 to the third drive shaft 25 via the bevel gear 24, and further, the third shaft 25. Rotational power is transmitted to the drive shaft for lower conveyance and the cutter drive via the bevel gear. Further, a gear box 27 extending substantially upward is fixed to the first cylindrical body 17, and the rotational power of the first drive shaft 18 is transmitted to the left and right horizontally long upper transport drive shaft 28 via a gear group and a chain. The The power transmission mechanism itself is not directly related to the present invention and will not be described in detail. For example, see Japanese Patent Application Laid-Open No. 2004-97038 if necessary.

  The first cylindrical body 17 is attached to a bracket device 29 so as to be rotatable around its axis, and the bracket device 29 is horizontally mounted on a vertical support shaft 31 erected on the left front end portion of the body frame (chassis) 30. It is mounted so that it can rotate. Accordingly, the second cylinder 19 can be rotated in the vertical direction around the first cylinder 17, and the bearing rib 32 is provided in a portion of the second cylinder 19 away from the rotation center. The bearing rib 32 is connected to a piston rod 33a of a lifting hydraulic cylinder 33 extending in the front-rear direction by a horizontally long pin 34. The rear end of the lifting hydraulic cylinder 33 is connected to a bearing member 35 provided on the body frame 30 so as to be rotatable by a pin.

  When the mowing unit 3 is opened and rotated, as a prerequisite work, the pin 34 connecting the lifting hydraulic cylinder 33 and the second cylinder 19 is removed and the pulley of the machine body side output shaft 23 and the first drive are removed. The belt 22 wound around the pulley 21 of the shaft 18 is removed.

(3) Details of Attachment Structure Next, details of the attachment structure of the first cylinder 17 and the second cylinder 19 will be described with reference to FIG.

4 is an exploded perspective view showing the main members, FIG. 5 is a front view of the main parts with some members omitted, FIG. 6 is a separated front view of the main parts, and FIG. (B) is a cross-sectional view taken along line BB of (A), (C) is a partial cross-sectional view of (A), and (A) in FIG. FIG. 7 is a cross-sectional view taken along the line VIIIA-VIIIA in FIG. 7, (B) is a cross-sectional view taken along the line BB in FIG.
FIG. 9 is a sectional view taken along the line CC of FIG. 9A, FIG. 9 is a sectional view taken along the line IX-IX in FIG. 6, and FIG.

  For example, as shown in FIGS. 4, 5, and 8, the bracket device 29 includes a bush 38, which is an upper bush 37 that is rotatably fitted to the vertical support shaft 31. A right end portion of the second cylindrical body 19 is rotatably supported in a front view by the lower bearing portion 39 having a half opening shape and the upper bearing portion 40 having a downward opening half shape fixed to the lower bearing portion 39 by bolts 39a. . The upper bearing portion 40 is located on the near side of the axis of the vertical support shaft 31. In FIG. 7, the lower bearing portion 39 is omitted.

  The upper and lower bushes 37 and 38 are arranged with a space therebetween in the vertical direction, and the vertical support shaft 31 is positioned between the upper and lower bushings 37 and 38 and the body frame 30 with a reinforcing shaft (reclined in a side view). A shaft 36 is fixed by welding. The upper bush 37 has an integral structure, but the lower bush 38 cannot be made into an integral structure due to the presence of the reinforcing shaft 36, so it is divided into two, and is fixed integrally with a bolt 38a. The reinforcing shaft 36 uses a round pipe, but various materials such as a square steel pipe and a channel material can be used.

  A single base plate 41 is fixed to the upper and lower bushes 37 and 38 with bolts 42, and ends of upper and lower arms 43 and 44 are fixed to the base plate 42 by welding. The base plate 41 is formed with front and rear bent pieces 41a. For this reason, the rigidity is improved.

  The arm 43 uses a square steel pipe, and the upper arm 43 is in a horizontal posture, while the lower arm 44 is inclined so that the height increases as the distance from the base plate 41 increases. The tip of the is close. A steel plate end plate 45 is fixed to the ends of the arms 43 and 44 by welding, and a cast member or the like bearing member 47 is fixed to the end plate 45 with a bolt 48. The bearing member 47 is formed with a bearing hole 46 into which the left end portion of the first cylindrical body 17 is fitted in the front view.

  The bearing member 47 has a reinforcing rib 47a. In addition, a bottom plate 47b projecting forward and backward is formed at the lower end of the bearing member 47, while a support column 49 is set up at a portion of the body frame 30 that is positioned below the bearing member 47 when the cutting unit 3 is in the closed state. The bottom plate 47 b of the bearing member 47 is fixed to the support plate 50 provided at the upper end of the support column 49 with bolts 51. Thus, by fixing the bearing member 47 to the support column 49, the cutting unit 3 is held in a closed state, and a load (moment) is applied to the arms 43 and 44 with the cutting unit 3 closed. There is no.

  Steel plate reinforcing plates 52 are fixed to the front and rear surfaces of the upper and lower arms 43, 44 by welding. For this reason, the rigidity of the bracket device 39 is remarkably improved, and the support strength can be dramatically increased.

  In the cantilever structure, since the bending stress with respect to the load decreases as it goes to the free end, if the lower hollow arm 44 is inclined as in this embodiment, high strength can be ensured while saving the overall weight. There are advantages. In this embodiment, since the end plate 45 is welded to the arms 43 and 44, the bracket device 29 is strong as a whole, and the bearing member 47 is fastened to the end plate 45 with bolts 48. Therefore, the mounting position of the bearing member 47 with respect to the end plate 45 can be somewhat shifted, and therefore the first cylinder 17 can be accurately supported without lowering the rigidity.

  The first drive shaft 18 is rotatably supported by the first cylindrical body 17, and two pulleys 21 are fixed to the end exposed from the first cylindrical body 17. In addition, a box portion 17a that covers the bevel gear 24 is formed in the first cylindrical body 17, and the gear box 27 described above is fixed to the box portion 19a.

  As shown in FIGS. 6 and 9, the second cylinder 19 is flange-coupled to the box portion 17 a of the first cylinder 17 with a bolt 53. Needless to say, the second drive shaft 20 is rotatably supported by a bearing portion formed in the first cylindrical body 17. A specific form of the bearing rib 32 in the second cylinder 19 is shown in FIG. 9, for example. The pin 34 connected to the lifting / lowering hydraulic cylinder 33 has a handle portion 34a for facilitating insertion / removal. Although not shown, the pin 34 is usually fixed to the bearing rib 32 with a bolt (not shown).

  When the pin 34 is pulled out to open and rotate the mowing unit 3, the support for the mowing unit 3 is released. Therefore, a support means for holding the mowing unit 3 in a state where the pin 34 is pulled out and not lowered is necessary. . Therefore, in the present embodiment, an arm-like stopper (receiving member) 56 is attached to the reinforcing plate 52 on the near side of the bracket device 29 via a bearing 54 and a vertical pin 55 so as to be horizontally rotatable, A receiving portion 57 that is supported by a stopper 56 projects from the second cylinder 19.

  For example, as shown in FIG. 8, the distal end portion 56 a of the stopper 56 has an obliquely upward posture, while the receiving portion 57 of the second cylinder 19 has a recess 57 a into which the distal end 56 a of the stopper 56 is fitted from below. Is forming. For this reason, the fitting state of the stopper 56 and the receiving part 57 is maintained by the weight of the cutting part 3, and the fitting state is not canceled unexpectedly.

  The stopper 56 is not used in the normal state where the cutting unit 3 is closed. Therefore, a spring 58 is provided in order to selectively hold the non-use posture overlapping the reinforcing plate 52 and the use posture extending from the reinforcing plate 52 toward the front side. The spring 58 is mounted between a shaft 59 projecting in the middle of the front and rear of the stopper 56 and the support column 49 described above.

  In this case, by making the spring 58 exceed the fulcrum that exceeds the rotation center of the stopper 56 in the use posture and the non-use posture, the stopper 56 is selectively held in the use posture and the non-use posture. It is set. Further, the stopper 56 is integrally provided with a posture holding portion 56a that contacts the front surface of the reinforcing plate 52 when the stopper 56 is in a usage posture protruding from the reinforcing body 52 to the front side.

(4). Summary As described above, in order to open and rotate the cutting unit 3, first, the stopper 56 is rotated forward to receive the second cylinder 19, and in this state, the second cylinder 19 is rotated. The pin 34 that has been connected to the elevating hydraulic cylinder 33 is removed, the belt 22 for transmitting the power to the first drive shaft 18 is removed, and the bolt 51 that is fixing the bracket device 29 to the support column 49 is removed. Will work.

  In a normal state where the cutting unit 3 is not opened and rotated, the tip of the bracket device 29 is fixed to the support column 49, so the weight of the cutting unit 3 does not act on the bracket device 29 as a load. On the other hand, when the cutting unit 3 is opened and rotated for maintenance or the like, the weight of the cutting unit 3 is supported by the bracket device 29. In this case, since the bracket device 29 has a sturdy structure, the bracket device 29 can be supported in a stable state without providing the cutting unit 3 with wheels. Further, since no load is applied to the first cylinder 17, there is no adverse effect on the first cylinder 17 and the gears.

  Conventionally, the first cylinder is also used as a strength member for supporting the cutting part. In the first cylinder, the free end portion far from the rotation center is supported by a split-type bearing member. When opening the cutting part and turning it, the bolts were removed and the split-type bearing member was separated, but this was cumbersome work, and after the work such as maintenance was completed, the first cylinder In the original state, when the bearing member is not attached properly, there is a problem that the first cylinder is twisted.

  On the other hand, when a structure in which the bearing member 47 at the tip thereof is fixed to the support column 49 using the bracket device 29 as in the present embodiment, the bearing member 47 remains fitted in the first cylindrical body 17. Rotation of the first cylindrical body 17 is not twisted at all, and the labor for opening and closing the cutting unit 3 can be reduced. As shown in FIG. 10, the support plate 50 provided on the support column 49 is provided with an inclined guide piece 50 a for guiding the return rotation of the bracket device 29 that has been opened and rotated, or a stopper piece for positioning the bearing member 47. It is also possible to provide 50b.

(5). Other embodiments (FIGS. 11 to 12)
11 to 12 show a second embodiment. 11 is a front view of the main part, and FIG. 12 is a sectional view taken along line XII-XII in FIG. In this embodiment, a bracket device 29 for the vertical support shaft 31 is used.
The lower bushing 38 is formed in a U shape in plan view, and a slider 61 that contacts the outer peripheral surface of the vertical spindle 31 is provided therein. In this example, the base plate 41 is welded to the lower bush 38. For this reason, it is excellent also in intensity.

  The load acting on the bracket device 29 acts on the upper bush 37 as a pressing force toward the right side of the vertical support shaft 31 in front view as indicated by an arrow A in FIG. 11 acts as a pressing force to the left surface side of the vertical support shaft 31 as viewed from the front as indicated by an arrow B in FIG. 11, so that the lower bush 38 does not have to be formed in a cylindrical shape as in the second embodiment. The shape is enough. Since the lower bush 38 only needs to be fitted to the vertical support shaft 31 from the outside of the radius, the mounting operation is extremely simple and can contribute to weight reduction. It is also possible to make the lower bush 38 only have the slider 61.

(6). Others The present invention can be embodied in various ways other than the above-described embodiments. For example, the bracket device does not necessarily use a hollow arm, but may be formed in an H-shaped cross section (or a horizontal H shape) or a hollow square that is long in the vertical direction. Moreover, when using a hollow material as an arm, it is possible to use a round pipe or an elliptical pipe.

It is the whole combine perspective view to which the present invention is applied. It is a top view of a combine in the state where a cutting part was opened. It is a skeleton figure which shows the outline of the cutting part 3 attachment structure and a power transmission device mechanism. It is a separation perspective view showing a main member. It is a front view of the principal part which abbreviate | omitted the one part member. It is a separation front view of an important section. (A) is the top view of the principal part which abbreviate | omitted one part member, (B) is BB sectional drawing of (A), (C) is a fragmentary sectional view of (A). 7A is a cross-sectional view taken along the line VIIIA-VIIIA in FIG. 7 with some members omitted, FIG. 7B is a cross-sectional view taken along the line BB in FIG. 7A, and FIG. It is sectional drawing. It is the IX-IX view of FIG. FIG. 6 is a cross-sectional view taken along line XX in FIG. 5. It is a principal part front view of 2nd Embodiment. FIG. 12 is a sectional view taken along line XII-XII in FIG. 11.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Cutting part 17 1st cylinder 18 1st drive shaft 19 2nd cylinder 20 2nd drive shaft 29 Bracket apparatus 32 Bearing rib 33 Lifting hydraulic cylinder 37, 38 Bush 41 Base plate 43, 44 Arm 45 End Plate 46 Bearing member 52 Reinforcing plate

Claims (1)

A vertical support shaft that has a cockpit and a threshing portion and is equipped with an engine, and a cutting portion that is disposed in front of the traveling aircraft body, and that is in a standing posture at a portion closer to the left end of the front portion of the traveling aircraft body. In the combine that the cutting part can rotate horizontally around the axis of the vertical support shaft and open and rotate toward the outer side of the traveling machine body,
A first cylindrical body of the machine body transverse direction sideways like, provided with a second cylindrical body supporting the vertical swingably the reaper with axis around the first cylindrical body, said first tubular member An elevating hydraulic cylinder that drives and oscillates the second cylinder around a predetermined oscillating range around an axis, and is configured to freely disengage the elevating hydraulic cylinder and the second cylinder;
A bracket device is provided that supports one end of the first cylinder in the body width direction so as to be swingable about a longitudinal axis, and the first cylinder and the bracket device are provided so as to rotate integrally. the state releasing the interlocking of the lifting hydraulic cylinder and said second cylindrical body, and a cutting working posture located in front of the front Symbol traveling machine body, across the open position for opening the front of the vehicle body, Around the longitudinal axis core, support the cutting portion so that the posture can be changed,
When the posture changes in vertical axis around the reaper, the reaper a structure is provided with a stopper to hold between within the predetermined rotation range, sideways like the axis of the first cylindrical body said second cylindrical body sites distant to the body front side of the over the bracket device sites distant downward from the transverse axis of said bracket device, and configured to bridging the stopper in an oblique direction Combine that is characterized by that.

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