JP2021065173A - combine - Google Patents

Abstract

To provide a combine that is prevented from causing a delay in posture switching due to muddy water applied to an electric motor or debris deposited when switching a narrow guide for preventing uncut culm from falling to the side of a reaping unit or a threshing unit into a working posture or a storing posture by using the electric motor, and is reduced in cost as low as possible by simplifying its posture switching mechanism.SOLUTION: A combine is configured as follows: an electric motor is mounted to a motor base fixed in an upper part side of a reaping unit; also, a swinging arm engaged to a narrow guide is mounted to a bracket fixed in a lower side of the reaping unit in a freely turning manner; then, the electric motor is connected with the swinging arm by a drive shaft becoming substantially a vertical direction; the swinging arm is rotated by the forward/reverse rotation of the electric motor through the drive shaft; and thereby the narrow guide is switched between a working posture and a storing posture while keeping the height substantially constant.SELECTED DRAWING: Figure 3

Description

The present invention relates to a combine, and more particularly to a combine provided with a narrow guide for preventing the uncut culm from collapsing toward the harvesting section or the threshing section.

The combine, which harvests grains by harvesting rice, wheat, etc., raises a fluffy grain culm (cut grain culm) sorted by a weed body provided at the lower part of the front end of the cutting section by a plurality of raising devices and scraping devices, and cuts a blade. The harvested grain is harvested by the device, and the harvested grain culms are merged by the grain culm transport device composed of the left and right tip and the stock source transport device and transported to the threshing section. Grains are threshed and sorted from the culms transported from the cutting section by a moving plate or the like and harvested.

Then, during such cutting work, the standing hair culms (uncut culms) that have come off from the weeds of the cutting part to the outside will be cut after the next process, but the adjacent uncut culms will be cut. When it collapses to the grain culm side (cutting part or threshing part side), it comes into contact with the side part of the cutting part or the threshing part to cause the uncut grain culm to shed grains, and the grain culm being cut and transported to the threshing part. There is a problem that the culm comes into contact with the stock and the transport posture is disturbed or the culm is stagnant on the spot to cause a transport clogging.

Therefore, since the threshing part of the combine is usually provided on the left side of the machine body, a narrow guide (left narrow guide) that projects outward from the rear part of the leftmost weed body of the cutting part on that side to the threshing part. ) Is provided, and this narrow guide prevents the uncut culm from collapsing toward the harvesting section and threshing section. Alternatively, if the fluffy culm has fallen, the fallen uncut culm is made to stand up while keeping away from the cutting part and the threshing part by a narrow guide.

Further, if the narrow guide always projects outward toward its working posture, it may come into contact with an obstacle or the like during moving and traveling, and may be damaged, and the width of the machine body is widened. Therefore, when the cutting work is performed, the narrow guide is placed in the working posture as described above, but when the cutting work is not performed, it is necessary to move the narrow guide to the cutting part or the threshing part side and switch the narrow guide to the retracted posture. ..

Then, in this case, the attitude of the narrow guide is switched by moving the worker to the cutting section or the threshing section on the left side of the machine on which the narrow guide is provided, grasping the narrow guide by hand, and switching the posture. Alternatively, the attitude of the narrow guide is remotely switched via a mechanical linking mechanism by an operation lever provided in the control unit (see Patent Document 1). Further, a method is adopted in which a changeover switch or the like is provided in the control unit, and the electric motor (electric actuator) is rotated in the forward and reverse directions by this switch to electrically change the posture of the narrow guide (Patent Documents 2 and Patent Documents). 3).

Japanese Unexamined Patent Publication No. 2006-129829 Japanese Unexamined Patent Publication No. 2010-22282 JP-A-2007-330167

As described above, the combine is provided with a narrow guide for preventing the uncut culm from falling toward the cutting portion and the threshing portion, and the narrow guide is provided so as to be able to switch between the working posture and the retracting posture. Then, when switching the narrow guide between its working posture and the retracted posture, when the narrow guide is remotely switched via the mechanical linking mechanism by the operating lever provided in the control unit as in Patent Document 1, the narrow guide is switched. Since it is not necessary for the operator to get off the control section and move to the cutting section or the threshing section for the posture switching, the posture can be switched quickly.

However, in this case, the operating position of the operating lever is held by friction to maintain the posture of the weeding rod (narrow guide), and the angle formed by the weeding rod and the swing link in the working posture is made sharp so that the working posture is formed. When the weed rod comes into contact with an obstacle, the weed rod is automatically retracted to the retracted posture, and a stopper is provided on the lever guide to apply a large load to the weed rod (for example, a lodging material). In order to prevent the weed rod from being stored unintentionally during the cutting work of the wet material, there is a problem that the posture switching mechanism becomes complicated and expensive due to the friction plate or the like.

Further, when the attitude of the narrow guide is electrically switched by the electric motor as in Patent Document 2 and Patent Document 3, the switch provided in the control unit for the attitude switching of the narrow guide is operated to operate in the same manner as in Patent Document 1. The posture switching operation can be performed quickly in the unit. Moreover, the switch has an advantage that the operating force is smaller than that of the operation of the operating lever and the like, and the posture of the narrow guide can be easily changed.

However, if the electric motor is fixed to the pedestal of the bracket fixed to the cutting frame near the lower part of the cutting portion so that the drive shaft protrudes upward as in Patent Document 2, the electric motor is provided near the ground surface of the field. Is located, the electric motor is easily buried in the soil and muddy water is easily splashed on it, and muddy water and debris (weeds and culms) are accumulated on the pedestal, etc. that fixes the electric motor, and the electric motor and narrow guide There is a problem that the linkage mechanism is liable to break down and lacks practicality.

In that respect, when a U-shaped fixing bracket is fixed to the vertical transmission shaft extending upward from the cutting transmission shaft as in Patent Document 3, the motor bracket is fixed to the fixing bracket, and the electric motor is attached. Although it is to prevent the frictional force from decreasing due to the adhesion of mud and soil to the friction mechanism described below, as a result, the electric motor will be installed near the upper part of the cutting section, and the electric motor will be installed from the ground surface of the field. Since it is separated from the upper part, it becomes difficult for muddy water and the like to splash on it, and it is sufficiently practical.

However, in this case, the electric motor and the weeding rod are linked via a friction mechanism so that not only the electric motor but also the weeding rod can be manually changed in posture, or a constant external force is applied to the weeding rod. When the friction plate acts, the friction plate slips and an unreasonable external force does not act on the electric motor or the like to prevent damage to the weed rod or the electric motor. Therefore, the posture switching mechanism is complicated by the friction plate or the like as in Patent Document 1. Moreover, the problem of being expensive remains unsolved.

Therefore, in the present invention, when the narrow guide for preventing the uncut culm from falling toward the harvesting portion or the threshing portion is switched between the working posture and the retracting posture by using the electric motor, muddy water is splashed on the electric motor or dust is generated. It is an object of the present invention to provide a combine as cheaply as possible by simplifying the attitude switching mechanism so as not to accumulate and hinder the attitude switching.

In order to solve the above problems, the combine of the present invention first provides a weed body at the lower part of the front end of the cutting part for cutting the fluffy grain stalk and transporting it to the threshing part provided at the rear, and the stalk is used as a cutting stalk. In addition to sorting into uncut grain stalks, a narrow guide is provided from the rear part of the weed body to the threshing section, and this narrow guide prevents the uncut grain stalk from collapsing toward the cutting section and threshing section, and further the narrow guide. When switching between the working posture and the retracted posture using an electric motor, the electric motor is attached to a motor base fixed near the upper part of the cutting part, and the swing arm engaged with the narrow guide is closer to the lower part of the cutting part. The electric motor and the swing arm are rotatably attached to a bracket fixed to the motor, and the swing arm is connected by a drive shaft that is substantially in the vertical direction. It is characterized in that the narrow guide is configured to switch between the working posture and the retracting posture while keeping the height substantially constant by rotating the guide.

Secondly, the present invention is configured such that the tip portion of the swing arm that engages with the narrow guide faces forward in the retracted posture of the narrow guide and faces outward in the working posture of the narrow guide. At the same time, a stopper is provided to prevent the swing arm from rotating to the rear side in the working posture of the narrow guide, and the stopper is configured to receive an external force from the uncut grain culm.

Further, in the present invention, thirdly, a reduction gear mechanism is provided between the electric motor and the drive shaft, the electric motor and the reduction gear mechanism are provided on the lower surface side of the motor base, and the outer side thereof is provided. It is characterized by being covered with a side cover of the cutting part.

Fourth, in the present invention, the boss portion of the swing arm is fitted into the pin of the bracket fixed near the lower part of the cutting portion to rotatably support the swing arm, and the boss of the swing arm is supported. The portion is urged to the bracket side by a spring to eliminate the rattling of the swing arm, or the urging force of the spring is increased to hold the narrow guide in the working posture or the retracted posture.

According to the combine of the present invention, a weed body is provided at the lower part of the front end of the cutting part for cutting the fluffy culm and transporting it to the threshing part provided at the rear, and the culm is sorted into a cut culm and an uncut culm by this culm. A narrow guide is provided from the rear part of the weed body to the threshing part, and this narrow guide prevents the uncut culm from collapsing toward the cutting part and the threshing part. When switching between the posture and the retracted posture, the electric motor is attached to the motor base fixed near the upper part of the cutting part, and the swing arm engaged with the narrow guide is rotatable to the bracket fixed near the lower part of the cutting part. Then, the electric motor and the swing arm are connected by a drive shaft that is substantially in the vertical direction, whereby the swing arm is rotated via the drive shaft by the forward and reverse rotation of the electric motor, and the narrow guide is used. Is configured to switch between the working posture and the retracting posture while keeping the height substantially constant.

Therefore, it is possible to electrically switch between the working posture and the retracted posture of the narrow guide by an electric motor, and it is possible to quickly and easily switch the posture of the narrow guide with less operating force by operating a switch or the like provided on the control unit. it can. In addition, since the electric motor is attached to the motor base that is fixed near the upper part of the cutting part, the electric motor is installed away from the ground surface of the field upward, which makes it difficult for muddy water to get on the electric motor and prevents its failure. The durability can be improved.

Further, the electric motor and the swing arm rotatably attached to the bracket fixed to the lower part of the cutting part are connected by a drive shaft that is substantially in the vertical direction, and the swing arm is connected via the drive shaft by the forward and reverse rotation of the electric motor. Since the narrow guide is configured to be rotated to switch between the working posture and the retracted posture while keeping its height substantially constant, the drive shaft provided near the upper part of the cutting section is rotated in the substantially vertical direction. It can be directly converted to the rotation of the swing arm provided near the lower part of the cutting section, and the debris that falls on the drive shaft falls as it is without accumulating, which may hinder the rotation of the swing arm. Absent.

Moreover, since the swing arm keeps the height of the narrow guide substantially constant and switches between the working posture and the retracting posture, even if the timing of switching the narrow guide from the retracting posture to the acting posture is delayed, the narrow guide is not mowed. The culm can be pushed almost horizontally away from the cutting and threshing sections. Therefore, unlike the narrow guide that undulates and switches its posture as described in Patent Document 3, there is no problem that the narrow guide pushes down the uncut culm from above when switching from the retracted posture to the working posture, and the uncut grain is not cut. It is possible to prevent the culm from collapsing at all times.

Further, the tip portion of the swing arm that engages with the narrow guide is configured to face forward in the retracted posture of the narrow guide and outward in the working posture of the narrow guide, and the working posture of the narrow guide. If a stopper is provided to prevent the swing arm from rotating to the rear side and the stopper is configured to receive an external force from the uncut grain culm, the tip of the swing arm that engages with the narrow guide is the cutting section. The narrow guide's working posture can be set to the position facing outward, which is approximately the maximum away from the threshing part side, and the narrow guide posture can be switched efficiently while minimizing the length of the swing arm. it can.

In addition, a stopper is provided to prevent the swing arm from rotating to the rear side in the working posture of the narrow guide, and the stopper is configured to receive an external force from the uncut culm. Therefore, the narrow guide is configured to receive the uncut culm. When an external force from the culm is applied, the swing arm tries to rotate backward, but the rotation can be blocked by the stopper, so the external force from the uncut culm is applied to the electric motor side. It can be prevented from being damaged, and damage to the drive system including the electric motor can be prevented.

When an external force from the uncut culm is applied to the narrow guide as described above, the narrow guide tries to rotate around the attachment point provided at the tip end so as to be in the retracted posture. As a result, the swing arm engaged with the narrow guide tends to rotate with its tip end facing forward or rearward about its rotation axis. However, in this case, the tip of the swing arm in the working posture of the narrow guide faces outward as described above.

Therefore, the angle at which the straight line connecting the attachment point provided at the tip of the narrow guide and the tip engaged with the narrow guide of the swing arm intersects with the rotation axis of the swing arm and the straight line connecting the tip is It has an acute angle, and the swing arm tries to rotate around its rotation axis so that its tip faces backward. Therefore, the narrow guide can be held in the working posture by receiving and blocking the rotation of the swing arm to the rear side by the stopper, and the friction mechanism for protecting the electric motor during the posture switching mechanism of the narrow guide. It is not necessary to provide the above, and the posture switching mechanism can be simplified to reduce the cost.

Further, a reduction gear mechanism is provided between the electric motor and the drive shaft, the electric motor and the reduction gear mechanism are provided on the lower surface side of the motor base, and the outer side thereof is covered with a side cover of the cutting portion. And, the upper side of the electric motor and the reduction gear mechanism can be covered by the motor base, and even if dust accumulates on the upper surface of the motor base, especially to the meshing part between the pinion gear of the electric motor and the sector gear provided on the upper part of the drive shaft. It is possible to prevent the intrusion of debris and prevent the reduction gear mechanism from malfunctioning. Further, by covering the outer side of the electric motor and the reduction gear mechanism with the side cover of the cutting portion, the electric motor and the like can be protected from rainwater and car wash water.

Then, the boss portion of the swing arm is fitted into the pin of the bracket fixed near the lower part of the cutting portion to rotatably support the swing arm, and the boss portion of the swing arm is moved to the bracket side by a spring. When the narrow guide is held in the working posture or the retracted posture by urging to eliminate the rattling of the swing arm or by increasing the urging force of the spring, the gap between the boss portion of the swing arm and the bracket is created. It is possible to prevent noise due to rattling of the swing arm by eliminating it with a spring.

Also, in the unlikely event that the electric motor etc. breaks down, after removing the electric motor etc. and manually operating the narrow guide, increase the urging force of the spring and shake it by the frictional force between the boss part of the swing arm and the bracket. When the rotation of the moving arm is disabled, the narrow guide can be held in the working posture or the retracted posture, whereby it is possible to make a makeshift.

It is a left side view of the combine to which this invention is applied. It is a top view of the combine. It is a perspective view of a cutting part. It is a partial plan view of a cutting part. It is an exploded view of the attitude switching mechanism of a narrow guide. It is a top view of the attitude switching mechanism of a narrow guide. A state in which the narrow guide is switched to the working posture is shown, (a) is a side view thereof, and (b) is a plan view thereof.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the combine harvester 1 that threshes rice and wheat while harvesting grains and harvests grains is left and right below the machine frame (body) 2 that is framed in a substantially rectangular shape via a traveling frame 3. A crawler traveling device 4 is provided. The left and right crawler traveling devices 4 include a drive sprocket 6 attached to a drive shaft protruding from the left and right of the transmission case 5, an idle wheel 7 pivotally supported by the traveling frame 3, a track roller 8, and rubber wound around the drive sprocket 6. A crawler 9 is provided.

Further, a substantially rectangular driving frame is integrally connected to the front right side of the airframe 2 in the forward direction of the airframe, and a control unit 10 is provided over the operating frame and the airframe 2 behind the operating frame 2. The control unit 10 is provided with a driver's seat 12 behind the floor 11, a front console (front operation panel) 13 at the front of the floor 11, and a side console (front console) on the left side of the floor 11 and the driver's seat 12. A side operation panel) 14 is provided, and a cabin 15 covers the control unit 10.

Further, the cutting portion 16 is provided so as to be able to move up and down from the left front portion of the machine frame 2 to the front of the control portion 10 by a hydraulic cylinder (not shown). Then, the cutting unit 16 is provided with a plurality of weed bodies 17 and narrow guides 18 and 19 on the left and right at the lower part of the front end thereof, and among these, the weed body 17 uses the fluffy culms in the field as the cut culms and the uncut culms. The cut grain culms that have been separated and entered between the left and right weed bodies 17 are raised by a plurality of raising devices 20 having raising claws, and then, as shown in FIGS. 3 and 4, the protruding scraping belt 21 and the star The culm stock is cut by the reciprocal cutting blade device 23 while gathering together with the scraping device composed of the wheel 22. Further, the left and right narrow guides 18 and 19 keep the fluffy culms detached outward from the left and right cursive scripts 17 from the cutting section 16 and the like to prevent them from collapsing.

Further, the grain culms cut and cut by the cutting blade device 23 are sent to the rear by the star wheel 22, and the grain culms sent to the rear are taken over by the stock transfer device 24 provided in the left, right, and center to further rearward. Transport towards. Then, the terminal portion of the stock source transport device 24 provided in the center faces the merging portion provided in the middle of the transport path of the right stock source transport device 24, and the grain culm conveyed by the middle stock source transport device 24 is the merging portion in the middle. It merges with the grain culm transported by the right stock transfer device 24, and is subsequently taken over by the right stock transfer device 24.

On the other hand, the terminal portion of the stock source transport device 24 provided on the left side faces the terminal portion of the right stock source transfer device 24, and the culm transported by the left stock source transfer device 24 has been transported by the right stock source transfer device 24. It merges with the grain culm at the confluence at the end of both transport devices 24. Further, the merged grain culms are taken over by the handling depth transporting device 25 having the starting end portion facing both the merging portions, and are further conveyed rearward and upward.

Then, the grain culm handed over to the handling depth transport device 25 is handed over to the threshing feed chain 27 from the terminal portion of the handling depth transport device 25 via the auxiliary transport device 26. Up to this point, the transport route on the stock root side of the grain culm has been mainly described, but the tip side of the grain culm is provided on the upper side of the right stock root transport device 24, the handling depth transport device 25, and the auxiliary transport device 26. The tip transfer device 27 and the transfer claws attached to the transfer claws of the left and middle culm transfer devices 28 provided on the upper side of the left and middle stock transfer devices 24 are locked and transferred.

Further, the threshing section 29 is provided on the left side of the machine frame 2 behind the cutting section 16, and the first and second handling chambers are provided below the cylinder cover 30 that covers the upper part. Among them, in the first handling chamber, a threshing field chain 27 and its holding rail 31 for transporting the culm transported from the cutting section 16 along the handling port, a first handling cylinder provided with handling teeth and its receiving net, etc. Is provided. In addition, the second handling chamber is attached to the first handling chamber so as to face the rear of the machine from the rear end tip side of the first handling barrel, and the straw waste mixed with grains that could not be threshed in the first handling chamber. A second handling cylinder for processing and the like and a receiving net thereof are provided.

On the other hand, a sorting chamber is provided below the first and second handling chambers. The sorting chamber is provided with a oscillating flow plate, No. 1 and No. 2 spirals, a wall insert fan, a suction fan, etc., and grains and the like leaking from the receiving net of the handling chamber are placed on the oscillating flow plate. The sorted grains are transferred from the No. 1 spiral to the Glen tank 33 via the grain raising device 32, and the No. 2 product mixed with straw debris and the like is oscillated from the No. 2 spiral through the No. 2 reduction device. Put it back on the board.

Further, the straw debris reaching the end of the rocking flow plate, the straw debris captured by the suction fan, or the straw debris discharged from the end of the second handling cylinder is discharged to the outside of the machine behind the threshing section 29. Further, the culm discharged from the handling room after the threshing process is completed is conveyed toward the disc type cutter 35 by the straw discharging transport device 34, and the disc type cutter 35 is conveyed by the straw discharging transport device 34. Shred the culm and release it as cut straw to the site where it was cut.

Then, the grain tank 33 is provided further behind the driving unit 36 composed of a diesel engine or the like provided behind the control unit 10, and temporarily stores the grains transferred by the grain raising device 32. When the grain tank 33 is full of grains, the discharge auger is operated so that the grains are discharged from the grain tank 33 and discharged to a container or the like outside the machine.

The discharge auger is provided with a vertical pipe containing a horizontal spiral and a vertical spiral provided at the bottom of the Glen tank 33, and this vertical pipe is rotatably erected behind the Glen tank 33 by an auger swivel motor. It is composed of a pipe 37 and a second vertical pipe 40 which can be raised and lowered by a hydraulic cylinder 39 via a gear case 38 above the first vertical pipe 37.

The outline of each part of the combine 1 has been described above. Next, the narrow guide 18 provided on the left side of the cutting part 16 which is a feature of the present invention will be described in detail. The main body 18a made of a pipe is formed in a substantially linear shape as shown in FIG. 7, which plays a role of preventing the fall to the side of the threshing portion 29. The narrow guide 18 is provided from the rear part of the cursive script 17 on the leftmost side to the rear part of the cutting portion 16.

That is, the cursive script 17 that separates the cut grain culm and the uncut grain culm is attached to the tip of the weed frame 42 that is inserted and fixed from the front to the cutting frame 41 of the cutting section 16 so that the height can be adjusted up and down. Further, the cursive script 17 is provided with a guide portion 17a that is inclined to a front low and a rear height to form a wide width toward the rear portion in order from the front portion, and an L-shape is formed on the weeding frame 42 below the guide portion 17a. The fulcrum shaft 42a bent in the shape is fixed. Then, a mounting hole provided at the tip of the fulcrum shaft 42a is inserted and prevented from coming off by a snap pin to attach the main body 18a of the narrow guide 18.

Since the mounting hole provided at the tip of the main body 18a is larger than the diameter of the fulcrum shaft 42a, the narrow guide 18 allows the narrow guide 18 to move left and right with respect to the fulcrum shaft 42a and to allow some vertical movement. Install in the state. Further, the narrow guide 18 is provided with a guide rail 18b made of a round bar on the main body 18a. That is, the tip end of the guide rail 18b is attached to the middle portion in the longitudinal direction of the main body 18a, and the rear end portion is attached to the rear portion of the main body 18a, and the guide rail 18b is attached to the right side surface of the main body 18a with a predetermined gap in the longitudinal direction of the main body 18a. It will be installed along with.

Then, the narrow guide 18 is engaged with the swing arm 43 rotatably provided from the middle portion to the rear portion toward the lower left side of the cutting portion 16 via the guide rail 18b, and is engaged from the front of the swing arm 43. It is provided so that it can be switched between a retracted posture along the left side portion of 16 of the cutting portion and an acting posture of protruding outward from the left side portion of 16 of the cutting portion by rotating outward.

More specifically, as shown in FIG. 5, the swing arm 43 is folded into an L shape to be attached with a bolt together with a cover 47 covering the bell crank of the cutting blade device 23 on the left side of the lower transmission frame 44 of the cutting portion 16. Like the bent bracket 45, it is sandwiched and attached by a holding plate 46 bent in an L shape, and the boss portion 43a of the swing arm 43 is fitted above the pin 45a protruding from the upper surface of the bracket 45 and provided above. The presser plate 46 prevents the boss portion 43a of the swing arm 43 from coming off.

A disc spring 48 is interposed between the upper surface of the boss portion 43a and the lower surface of the presser plate 46, and the lower surface of the boss portion 43a is interposed via the disc spring 48 by two adjuster bolts 49 provided over the bracket 45 and the presser plate 46. Is crimped to the upper surface of the bracket 45 to eliminate rattling of the swing arm 43 in the vertical direction. Further, by further tightening the adjuster bolt 49 to increase the urging force of the disc spring 48, the swing arm 43 cannot be rotated, and when the electric motor or the like described later breaks down, the narrow guide 18 is operated for the time being. It can also be held in a posture or a retracted posture.

Further, the bracket 45 is provided with an arcuate elongated hole 45b centered on the pin 45a, and the pin 43b fixed to the boss portion 43a of the swing arm 43 is fitted into the elongated hole 45b to fit the pin 43b fixed to the boss portion 43a of the swing arm 43 to rotate the swing arm 43. Is mechanically regulated. On the other hand, the swing arm 43 includes a main body 43c made of a pipe that curves from the outer circumference of the boss portion 43a, which is the base thereof, and bends toward the tip upward, and a round bar is attached to the tip of the main body 43c. The engaging portion 43d bent in a shape is fixed.

Then, the narrow guide 18 is engaged with the swing arm 43 through the above-mentioned guide rail 18b attached to the narrow guide 18 to the engaging portion 43d provided at the tip of the swing arm 43, whereby from the intermediate portion of the narrow guide 18. The swing arm 43 receives and supports the rear part. The swing arm 43 rotates around a pin 45a projecting from the upper surface of the bracket 45 as a fulcrum, and the axis of the pin 45a tilts slightly forward from the vertical direction when the cutting portion 16 descends to the cutting work position. Tilt it so that it is installed.

Therefore, when the swing arm 43 is rotated so as to face the front, which is the forward direction of the combine 1, the engaging portion 43d provided at the tip of the swing arm 43 lowers toward the ground surface and engages with the guide rail 18b. The narrow guide 18 is pulled along the left side of the cutting portion 16 by moving the combined position toward the tip. On the contrary, when the swing arm 43 is rotated so as to face outward, the engagement portion 43d provided at the tip of the swing arm 43 rises away from the ground surface and rearranges the engagement position with the guide rail 18b. The narrow guide 18 is moved toward the edge and pulled away from the left side portion of the cutting portion 16 so as to project outward.

Therefore, when the swing arm 43 is rotated so as to face forward, the narrow guide 18 is in the retracted posture, and when the swing arm 43 is rotated so as to face outward, the narrow guide 18 is in the working posture. In this case, the height of the narrow guide 18 from the ground surface hardly changes before and after the posture change, and the height of the narrow guide 18 can be kept substantially constant to switch between the working posture and the retracted posture.

In the embodiment, the height of the narrow guide 18 in the working posture is made slightly higher than the height in the retracted posture shown by the alternate long and short dash line in FIG. 1, but the bending angle of the bracket 45 is changed so that the pin 45a There is no problem even if the height is made the same by changing the inclination angle of the narrow guide 18 or conversely, the height of the narrow guide 18 in the retracted posture is slightly higher than the height in the working posture. Further, the narrow guide 18 is engaged with the swing arm 43 through the guide rail 18b provided on the narrow guide 18 with the engaging portion 43d provided at the tip of the swing arm 43, but the narrow guide 18 is engaged with the engaging portion 43d of the swing arm 43. It is also possible to eliminate the guide rail 18b through the main body 18a of the guide 18.

By the way, the narrow guide 18 is provided with an auxiliary narrow guide 50 at the rear portion of the main body 18a to continuously prevent the uncut culm from collapsing from the rear side of the cutting portion 16 to the middle of the threshing portion 29. That is, the auxiliary narrow guide 50 includes a main body 50a made of a substantially straight pipe, and attachment portions 50b and 50c in which a round bar is bent in a U shape are provided at the front end portion and the rear end portion thereof. Then, the mounting portion 50b provided at the tip end is connected to the rear portion of the guide rail 18b of the narrow guide 18 bent in a U shape in a continuous ring shape, and the mounting portion 50c provided at the rear end portion is connected to the traveling frame 2 in the front-rear direction. The rear part of the auxiliary narrow guide 50 is supported by engaging with a guide rail 51 made of a round bar to be attached as.

Therefore, when the narrow guide 18 is switched from the retracted posture to the working posture by the swing arm 43, the tip portion 50b of the auxiliary narrow guide 50 projects to the outside of the cutting portion 16 together with the rear end portion of the narrow guide 18, and the auxiliary narrow guide 18 The rear end portion 50c of the guide 50 changes the engaging position toward the front along the guide rail 51, whereby the auxiliary narrow guide 50 also prevents the uncut culm from collapsing. The height of the auxiliary narrow guide 50 from the ground surface hardly changes before and after the change of the working posture and the retracting posture, and the height of the auxiliary narrow guide 50 can be kept substantially constant to switch between the working posture and the retracting posture. ..

The narrow guide 18, the auxiliary narrow guide 50 that complements the narrow guide 18, and the structure in which the narrow guide 50 is formed into the working posture and the retracting posture by the swing arm 43 have been described above. Next, the narrow guide 18 is switched between the working posture and the retracted posture. Explaining the driving method of the moving arm 43, the swing arm 43 is electrically driven by an electric motor 52 composed of a geared motor.

That is, the mounting seat 53a is provided in the vertical transmission case 53 that rises upward from the inside even on the left side side where the swing arm 43 of the lower transmission frame 44 of the cutting portion 16 is provided, and the motor base 54 is mounted on the mounting seat 53a. Then, the electric motor 52 is detachably attached to the lower surface side of the motor base 54 with bolts. Further, a metal portion 54a is provided on the motor base 54, and a boss portion 56a of the sector gear 56 that meshes with the pinion gear 55 provided on the output shaft of the electric motor 52 is fitted into the metal portion 54a from below to prevent it from coming off with a C-shaped ring.

Then, the upper end of the drive shaft 57, which is connected by inserting the lower end of the swing arm 43 into the boss 43a of the swing arm 43 through the hole 46a provided in the presser plate 46 and the disc spring 48, is inserted from below the boss 56a of the sector gear 56. The upper end of the drive shaft 57 is prevented from coming off from the boss portion 56a of the sector gear 56 with a C-shaped ring above the motor base 54. Further, the motor base 54 is provided with an arcuate elongated hole 54b centered on the metal portion 54a, and two limit switches 58 and 59 attached above the motor base 54 through the pin 56b fixed to the sector gear 56 through the elongated hole 54b. The actuator is operably provided by the contact of the pin 56b.

Further, the control unit 10 and the like are provided with an operation switch (not shown) for instructing the attitude switching of the narrow guide 18, and the operation switch and the above-mentioned limit switches 58 and 59 are connected to the control circuit (not shown) of the electric motor 52. To do. Then, this control circuit causes the electric motor 52 to rotate forward, reverse, or stop by an operation switch. Therefore, when the rotation instruction of the electric motor 52 is given by the operation switch, the electric motor 52 rotates in the forward direction or the reverse direction, and this rotation is decelerated by the meshing of the pinion gear 55 and the sector gear 56 constituting the reduction gear mechanism, and the sector gear. 56 rotates the swing arm 43 via the drive shaft 57, whereby the narrow guide 18 operates toward the working posture or the retracting posture.

Then, when one of the two limit switches 58 and 59 is operated by the pin 56b of the sector gear 56, the control circuit stops the forward rotation or the reverse rotation of the electric motor 52, whereby the narrow guide 18 is in the working posture or the retracting posture. It switches to and is held in that posture. When the electric motor 52 is stopped in this way, the pin 43b of the swing arm 43 comes into contact with the end surface of either one of the elongated holes 45b of the bracket 45, and further rotation of the swing arm 43 is restricted. Will be done.

The posture switching device of the narrow guide that drives the swing arm 43 by the electric motor 52 to switch the narrow guide 18 between the working posture and the retracted posture has been described above. When switching 18 to its working posture and retracted posture using the electric motor 52, the electric motor 52 is attached to the motor base 54 fixed near the upper part of the cutting portion 16, and the swing arm 43 is engaged with the narrow guide 18. Is rotatably attached to a bracket 45 fixed near the lower part of the cutting portion 16, and the electric motor 52 and the swing arm 43 are connected by a drive shaft 57 that is substantially in the vertical direction, and the electric motor 52 is rotated in the forward and reverse directions. The swing arm 43 is rotated via the drive shaft 57, and the narrow guide 18 is switched between the working posture and the retracted posture while keeping its height substantially constant.

Therefore, the working posture and the retracting posture of the narrow guide 18 can be electrically switched by the electric motor 52, and the narrow guide 18 can be operated quickly and easily with less operating force by operating an operation switch or the like provided on the control unit 10 or the like. Posture switching can be performed. Further, since the electric motor 52 is attached to the motor base 54 fixed near the upper part of the cutting portion 16, the electric motor 52 is provided so as to be separated from the ground surface of the field upward, and muddy water or the like is less likely to be applied to the electric motor 52. The failure can be prevented and the durability can be improved.

Further, the electric motor 52 and the swing arm 43 rotatably attached to the bracket 45 fixed near the lower part of the cutting portion 16 are connected by a drive shaft 57 in a substantially vertical direction, and swing by the forward and reverse rotation of the electric motor 52. Since the arm 43 is rotated via the drive shaft 57 and the narrow guide 18 is configured to be switched between the working posture and the retracted posture while keeping the height substantially constant, the electric motor 52 provided near the upper part of the cutting portion 16 Can be directly converted into the rotation of the swing arm 43 provided near the lower part of the cutting portion 16 via the drive shaft 57 which is substantially in the vertical direction, and the debris falling on the drive shaft 57 falls as it is without accumulating. However, the rotation of the swing arm 43 is not hindered.

Moreover, as described above, the rotation axis (45a) of the swing arm 43 is provided so as to be tilted slightly forward from the vertical direction when the cutting portion 16 is lowered to the cutting work position, so that it is provided from the front to the outside. The swing arm 43 facing the direction switches the narrow guide 18 between the working posture and the retracting posture while keeping its height substantially constant. Therefore, even if the timing of switching the narrow guide 18 from the retracted posture to the working posture is delayed after the cutting work starts, the narrow guide 18 keeps the uncut culms away from the cutting section 16 and the threshing section 29. It can be pushed almost horizontally, and the narrow guide 18 does not push down the uncut culm from above.

Further, since the tip portion 43d engaged with the narrow guide 18 of the swing arm 43 faces forward in the retracted posture of the narrow guide 18 and faces outward in the working posture of the narrow guide 18, swings. The position where the tip portion 43d engaged with the narrow guide 18 of the arm 43 faces outward, which is substantially the maximum distance from the cutting portion 16 and the threshing portion 29 side, can be set as the working posture of the narrow guide 18, and the swing arm 43 can be operated. The posture of the narrow guide 18 can be efficiently switched while keeping the length to the minimum necessary.

Further, when an external force from the uncut culm is applied to the narrow guide 18 in the working posture, the narrow guide 18 tries to rotate so as to be in the retracted posture around the mounting point (mounting hole) provided at the tip portion. .. As a result, the swing arm 43 engaged with the narrow guide 18 tends to rotate about the rotation fulcrum (45a) so that the tip portion 43d faces forward or backward. However, in this case, the tip portion 43d of the swing arm 43 in the working posture of the narrow guide 18 faces outward.

Therefore, a straight line c connecting the attachment point a provided at the tip of the narrow guide 18 and the tip b (43d) engaged with the narrow guide 18 of the swing arm 43 and the rotation axis d (45a) of the swing arm 43. The angle θ at which the straight line e connecting the tip portion d (43d) and the tip portion d (43d) intersects is an acute angle, and the swing arm 43 has the tip portion b (43d) centered on the rotation axis d (45a). Attempts to rotate so that it faces backwards. However, the elongated hole 45b of the bracket 45 that regulates the rotation range of the swing arm 43 serves as a stopper that prevents the swing arm 43 from rotating to the rear side.

Therefore, the stopper 45b prevents the swing arm 43 from rotating to the rear side, receives an external force from the uncut grain culm applied to the narrow guide 18, and serves as a breakwater so that the external force is not applied to the electric motor 52 side. , Prevents damage to the drive system such as the reduction gear mechanism including the electric motor 52. Further, since the stopper 45b holds the narrow guide 18 in the working posture in this way, it is not necessary to provide a friction mechanism for protecting the electric motor 52 in the posture switching mechanism of the narrow guide 18, which simplifies the posture switching mechanism. It is possible to reduce the cost.

Further, the output shaft of the electric motor 52 and the drive shaft 57 may be directly connected, but since a reduction gear mechanism including a pinion gear 55 and a sector gear 56 is provided between the electric motor 52 and the drive shaft 57, the swing arm 43 The torque can be increased to reliably switch the posture of the narrow guide 18. Further, since the electric motor 52 and the reduction gear mechanisms 55 and 56 are provided on the lower surface side of the motor base 54, even if dust accumulates on the upper surface of the motor base 54, the pinion gear 55 of the electric motor 52 and the upper part of the drive shaft 57 are particularly provided. It is possible to prevent the intrusion of dust into the meshing portion with the sector gear 56 provided in the above and prevent the reduction gear mechanism from malfunctioning.

Moreover, the electric motor 52 and the reduction gear mechanisms 55 and 56 are provided on the left side, which is the outer side of the vertical transmission case 53, which does not interfere with the transportation of the cut grain, and the side cover 60 covering the left side surface of the cutting portion 16 is provided on the left side. Is detachably provided, so that the outer side of the electric motor 52 and the reduction gear mechanisms 55 and 56 is covered with the side cover 60 of the cutting portion 16 to protect the electric motor 52 and the like from rainwater and car wash water. be able to.

Then, as described above, the boss portion 43a of the swing arm 43 is fitted into the pin 45a of the bracket 45 fixed to the lower portion of the cutting portion 16 to rotatably support the swing arm 43, and the swing arm 43 is supported. The boss portion 43a of 43 is urged to the bracket 45 side by a spring such as a disc spring 48 to eliminate the rattling of the swing arm 43, or to increase the urging force of the spring to move the narrow guide 18 in the working posture or retract. When held in the posture, the gap between the boss portion 43a of the swing arm 43 and the bracket 45 can be eliminated by a spring to prevent noise due to the rattling of the swing arm 43.

If the electric motor 52 or the like should break down, the electric motor 52 or the like is removed from the motor base 54, the narrow guide 18 is manually switched to the working posture or the retracted posture, and then the adjuster bolt 49 is further tightened. The urging force of the spring 48 is increased to prevent the swing arm 43 from rotating due to the frictional force between the boss portion 43a of the swing arm 43 and the bracket 45.

Then, in this way, the narrow guide 18 can be held in the working posture or the retracted posture, and during the cutting work, the narrow guide 18 can be put in the working posture and the work can be restarted, and the moving traveling is performed. In this case, the narrow guide 18 may be placed in the retracted posture so that the vehicle can travel safely, and then the electric motor 52 and the like may be repaired.

The narrow guide described above mainly describes the narrow guide 18 on the left side where the threshing portion 29 of the machine frame 2 is provided, but the narrow guide 19 on the right side made of a pipe is used as the weeding frame of the rightmost weed body 17. The tip portion and the rear end portion thereof are attached to the cutting frame, and the fluffy culm that is detached outward from the right-sided weed body 17 is kept away from the side portion of the cutting portion 16 to prevent it from falling into the cutting portion 16. Further, the fluffy culm that has come off the right narrow guide 19 is subsequently prevented from collapsing by the control portion 10 and the side portion of the grain tank 33.

Therefore, since the narrow guide 19 on the right side does not project significantly from the right side of the machine body on which the control unit 10 and the grain tank 33 are provided, it is not necessary to switch between the working posture and the retracted posture, and the narrow guide 19 is always fixed and provided in the working posture. However, if it is necessary to project the uncut culm away from the machine body by protruding greatly to the right side of the machine body, a posture switching device may be provided like the narrow guide 18 on the left side.

Further, in the combine 1, counterclockwise cutting is generally performed particularly when harvesting rice, and at that time, the narrow guide 18 on the left side is not located at the ridge and there is no risk of collision with the ridge or the like and damage. However, when the uncut culm left on the ridge is cut counterclockwise and cut clockwise, the narrow guide 18 on the left side may collide with the ridge and be damaged. In this case, if the narrow guide 18 on the left side is switched to the retracted posture and the work is performed, the narrow guide 18 on the left side can be prevented from being damaged, and the height of the narrow guide 18 does not increase even if the narrow guide 18 is switched to the retracted posture. Therefore, the cutting work can be performed without interfering with the transportation of the cut grain culm.

1 combine 16 cutting part 17 cursive script 18 narrow guide (left)
29 Threshing part 43 Swing arm 45 Bracket 45b Long hole (stopper)
50 Auxiliary narrow guide 52 Electric motor 54 Motor base 55 Pinion gear (reduction gear mechanism)
56 Sector gear (reduction gear mechanism)
57 Drive shaft 60 Side cover

Claims (4)

A weed body is provided at the lower part of the front end of the cutting part that cuts the fluffy grain and transports it to the threshing part provided at the rear. A narrow guide is provided over the area, and this narrow guide prevents the uncut grain from falling toward the cutting section and threshing section, and the narrow guide is switched to its working posture and retracting posture using an electric motor. The electric motor is attached to a motor base fixed near the upper part of the cutting part, and the swing arm engaged with the narrow guide is rotatably attached to a bracket fixed near the lower part of the cutting part, and the electric motor And the swing arm are connected by a drive shaft that is substantially in the vertical direction, so that the swing arm is rotated via the drive shaft by the forward and reverse rotation of the electric motor, and the narrow guide is made substantially constant in height. A combine characterized by being configured to be maintained and switched between a working posture and a retracting posture. The tip of the swing arm that engages with the narrow guide is configured to face forward in the retracted posture of the narrow guide and outward in the working posture of the narrow guide, and swing in the working posture of the narrow guide. The combine according to claim 1, wherein a stopper is provided to prevent the moving arm from rotating to the rear side, and the stopper is configured to receive an external force from an uncut grain culm. A reduction gear mechanism is provided between the electric motor and the drive shaft, the electric motor and the reduction gear mechanism are provided on the lower surface side of the motor base, and the outer side thereof is covered with a side cover of the cutting portion. The combine according to claim 1 or claim 2. The boss portion of the swing arm is fitted into the pin of the bracket fixed to the lower part of the cutting portion to rotatably support the swing arm, and the boss portion of the swing arm is urged to the bracket side by a spring. The narrow guide is held in the working posture or the retracted posture by eliminating the rattling of the swing arm or increasing the urging force of the spring, according to any one of claims 1 to 3. Combines listed in one.

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