JP5129584B2 - Exhaust cutting device - Google Patents

Description

  The present invention relates to a technique of a waste cutting apparatus. More specifically, the present invention relates to a technique for switching the waste cutting length in the waste cutting apparatus.

  2. Description of the Related Art Conventionally, there is a waste cutting device provided in a combine or the like, in which the distance between a pair of cutter shafts arranged in parallel is changed with an operation tool such as a switching lever so that the waste cutting length can be switched. . When this excision cutting device is used to switch the length of the excretion cutting length, the switching mechanism such as pulling the switching lever etc. to the front with the switching mechanism performs the switching operation to release the locked state of the cutter shaft by the locking means By doing so, one cutter shaft was moved, and the distance between the axes was changed.

  In such a switching mechanism, since the cutter shaft is firmly locked to the locking means so that the cutter shaft does not become unstable when the reject cutting device is operated, the locked state cannot be easily released. When releasing the locked state of the cutter shaft by the stopping means, a large effort is required for the switching operation using the switching lever or the like. Therefore, a technique that can reduce the above-described labor has been proposed (for example, see Patent Document 1).

JP 2004-159555 A

  However, in the configuration disclosed in Patent Document 1, when switching the length of the excision cutting length, the switching lever is pulled forward, and the switching mechanism releases the locked state of the cutter shaft by the locking means. While changing the distance between the axes of the cutter shafts while maintaining the state of the lever, the cutter shafts had to be locked to the locking means again. For this reason, the switching operation of the excretion cutting length is complicated. In addition, since the connecting plate is interlocked and connected to the switching lever, the structure relating to the switching of the removal cutting length is complicated, and the number of parts is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an exclusion cutting device that facilitates the switching operation of the exclusion cutting length and has a simple structure for the switching mechanism of the exclusion cutting length.

That is, in claim 1, a first rotary shaft in which a plurality of first large-diameter rotary blades and first small-diameter rotary blades are alternately fixed at predetermined intervals, and a plurality of second rotary blades at predetermined intervals. And a second rotating shaft disposed so as to be close to or away from the first rotating shaft, and a switching mechanism that enables the second rotating shaft to be switched and fixed to a close position or a separated position. In the waste cutting apparatus capable of switching the cutting length of the scissors, the switching mechanism includes a first positioning member and a second positioning member that protrude from a side plate that supports the first rotating shaft and the second rotating shaft, A cam that is disposed between the first positioning member and the second positioning member and is rotated and locked to the first positioning member or the second positioning member so that the second rotation shaft can be switched and fixed; , comprising a, ah to the arm for supporting the second rotating shaft A shaft is pivotally supported, the center of the cam is fixed to the arm shaft, a first locking groove for locking to the first positioning member on both sides of the cam, and a first locking groove for locking to the second positioning member. The two locking grooves and the guide portion for sliding the arm in sliding contact with the first positioning member or the second positioning member when the cam is switched between long and short are formed .

  As effects of the present invention, the following effects can be obtained.

  Since it comprised like Claim 1, long / short switching operation of a waste cutting length can be performed easily. In addition, it becomes possible to make the switching mechanism of the excision cutting length to have a simple structure, and it is possible to reduce the cost. Furthermore, the second rotating shaft can be reliably fixed by the switching mechanism.

Moreover , the labor required at the time of switching the length of excretion cutting can be reduced.

  Below, combine 1 which is one embodiment of a combine concerning the present invention is explained with reference to drawings.

  First, a schematic configuration of the combine 1 will be described with reference to FIG.

  The combine 1 harvests rice, wheat and the like, and more specifically, harvests cereal grains from the field while running through the field and threshes the grain.

  The combine 1 of this embodiment is a self-decomposing combine that threshes only the tip portion with a grain of the harvested cereal.

  The combine 1 mainly includes a reaping device 2, a threshing device 3, a sorting device 4, and a waste treatment device 5.

  The reaping device 2 is arranged at the front part of the combine 1. The reaping device 2 includes a pulling device, a lower conveying device, a tip conveying device, a cutting blade, and the like, and harvests the culm from the field and passes the cereal to the threshing device 3.

  The threshing device 3 is arranged behind the reaping device 2. The threshing device 3 mainly includes a feed chain 3a, a handling cylinder 3b, and the like. The threshing device 3 separates the cereal grains from the culm by the rotation of the barrel 3b while conveying the cereals received from the reaping device 2 sideways with the feed chain 3a from the front to the rear. )

  The sorting device 4 is disposed below the threshing device 3. The sorting device 4 separates swarf and dust mixed in the grain threshed by the threshing device 3 by wind sorting or rocking sorting.

  The waste treatment device 5 is arranged behind the threshing device 3. The waste treatment device 5 carries a predetermined process such as transporting the threshed cereals (hereinafter simply referred to as “exhaust”) received from the feed chain 3a to the rear by the waste chain 5a and cutting the waste. Apply.

  The refined grains separated from the swarf and the like by the sorting device 4 are carried into a glen tank 7 provided on the right side of the threshing device 3 through the milling cylinder 6 and stored. A discharge auger 8 is connected to the Glen tank 7 in communication. By operating the discharge auger 8, the fine particles stored in the Glen tank 7 are carried out of the Glen tank 7 through the discharge auger 8.

  An operation unit 9 for an operator to operate the combine 1 is disposed in front of the Glen tank 7.

  Next, the configuration of the waste cutting apparatus 20 provided in the waste disposal apparatus 5 will be described with reference to FIGS. 2 and 3.

  The waste cutting device 20 cuts the waste that has been conveyed by the waste chain 5a into a predetermined length, and is configured so that the waste cutting length can be switched between long and short by a short / short switching operation. The The waste cutting device 20 includes a cutting case 21, a first rotary shaft 22, a first large-diameter rotary blade 22a, a first small-diameter rotary blade 22b, a second rotary shaft 23, a second rotary blade 23a, a switching mechanism 30, and the like. Provided.

  As shown in FIG. 2, the cutting case 21 is disposed below the waste chain 5a. The cutting case 21 is formed in a box shape and includes side plates 21a and 21a on both the left and right sides. Inside the cutting case 21, the first rotating shaft 22 and the second rotating shaft 23 are horizontally mounted between the left and right side plates 21 a and 21 a in the horizontal direction, and the second rotating shaft 23 is in front of the first rotating shaft 22. It arrange | positions so that it may be located upwards.

  A plurality of first large-diameter rotary blades 22a, 22a,... And first small-diameter rotary blades 22b, 22b,... Are alternately fixed to the first rotary shaft 22 at predetermined intervals. The A plurality of disk-shaped second rotary blades 23a, 23a,... Are fixed to the second rotary shaft 23 at predetermined intervals. The second rotary blades 23a, 23a,... On the second rotary shaft 23 correspond to the first large-diameter rotary blades 22a, 22a,. The first small-diameter rotary blades 22b, 22b,... Or the first large-diameter rotary blades 22a, 22a,.

  As shown in FIG. 3, the first rotating shaft 22 is rotatably supported by the left and right side plates 21 a and 21 a and protrudes from the left side plate 21 a to the outside of the cutting case 21. An input pulley 22d and a drive sprocket 22c are juxtaposed at the protruding end of the first rotary shaft 22 so as not to rotate relative to each other. The second rotating shaft 23 is rotatably supported by a switching mechanism 30 described later, and protrudes to the outside of the cutting case 21 from the left side plate 21a. A large-diameter gear 23b is fixed to the protruding end portion of the second rotating shaft 23 so as not to be relatively rotatable.

  A support shaft 24 is rotatably supported below the second rotation shaft 23 of the left side plate 21a, and protrudes toward the outside and the inside of the cutting case 21 in parallel to the second rotation shaft 23. On the outside of the support shaft 24, a driven sprocket 24a and a small-diameter gear 24b are supported so as not to be relatively rotatable.

  A chain 22f is wound between a drive sprocket 22c on the first rotating shaft 22, a driven sprocket 24a on the support shaft 24, and a sprocket (not shown). Further, the large-diameter gear 23b on the second rotating shaft 23 and the small-diameter gear 24b on the support shaft 24 are meshed with each other. The power transmitted from the engine of the combine 1 can be transmitted to the input pulley 22d on the first rotating shaft 22 via the drive belt 22e and the like.

  When power is transmitted to the input pulley 22d, the first rotary shaft 22 is rotated in the counterclockwise direction in FIG. 3, and accordingly, the drive sprocket 22c is also rotated in the same direction. When power is transmitted from the drive sprocket 22c to the driven sprocket 24a via the chain 22f, the support shaft 24 is rotated counterclockwise in FIG. 3, and the small diameter gear 24b is rotated accordingly.

  Then, power is transmitted from the small diameter gear 24b to the large diameter gear 23b, and the second rotary shaft 23 is rotated in the clockwise direction in FIG. By such rotation of the first rotary shaft 22 and the second rotary shaft 23, the first large-diameter rotary blade 22a and the first small-diameter rotary blade 22b on the rotary shafts 22 and 23 and the second rotary blade 23a rotate. Is done. The rotation speed of the second rotation shaft 23 is set to be lower than the rotation speed of the first rotation shaft 22.

  Thus, in the waste cutting device 20, when the waste conveyed by the waste chain 5a is put into the cutting case 21, the first large-diameter rotary blade 22a and the first small-diameter rotation on the first rotary shaft 22 are provided. The blade 22b or only the first large-diameter rotary blade 22a and the second rotary blade 23a on the second rotary shaft 23 can be cut to a predetermined cutting length. Note that the waste after cutting is discharged from the lower part of the cutting case 21 toward the field.

  The configuration of the switching mechanism 30 provided in the waste cutting apparatus 20 will be described with reference to FIGS. 4 to 8.

  The switching mechanism 30 can switch and fix the second rotation shaft 23 to the proximity position P2 shown in FIG. 5 or the separation position P1 shown in FIG. Be placed. Since the left and right switching mechanisms 30 and 30 are configured substantially symmetrically, the description of the right switching mechanism 30 is omitted. However, the left and right switching mechanisms 30 are different in that only one switching mechanism 30 (left side in the present embodiment) has a switching lever 33 described later.

  The switching mechanism 30 includes a support shaft 24, a lower arm 25, an upper arm 26, an arm shaft 27, a first positioning member 31a, a second positioning member 31b, a cam 32, a switching lever 33, and the like. The lower arm 25 and the upper arm 26 are disposed inside the cutting case 21, and the first positioning member 31 a, the second positioning member 31 b, the cam 32, and the switching lever 33 are disposed outside the cutting case 21.

  As shown in FIG. 4, the upper arm 26 and the lower arm 25 are vertically arranged inside the cutting case 21 and extend in the vertical direction. The lower part of the lower arm 25 is fixed to the inside of the support shaft 24 that protrudes from the left side plate 21a below the second rotary blade 23a on the second rotary shaft 23. The upper part of the lower arm 25 is connected to the lower part of the upper arm 26, and the second rotating shaft 23 is pivotally supported by this connecting part.

  The upper part of the upper arm 26 is fixed to an arm shaft 27 that is horizontally mounted in the horizontal direction between the left and right side plates 21a and 21a above the second rotary blade 23a on the second rotary shaft 23. The arm shaft 27 is rotatably supported by the left and right side plates 21a and 21a, and protrudes to the outside of the cutting case 21 from the left side plate 21a. The base end portion of the switching lever 33 is fixed to the protruding end portion of the arm shaft 27.

  The arm shaft 27 passes through the left side plate 21a through the guide hole 21b. The guide hole 21b is arranged on a circumference centered on the support shaft 24, and is formed by a long hole extending substantially in the front-rear direction. The arm shaft 27 can be moved within a predetermined movement range along the guide hole 21b, and the upper and lower arms 26 and 25 can be rotated around the support shaft 24 along with this movement, and as a result, the second rotation. The shaft 23 is movable in the front-rear direction.

  A first positioning member 31a and a second positioning member 31b are provided on both front and rear sides of the guide hole 21b of the left side plate 21a. In the present embodiment, each of the first positioning member 31a and the second positioning member 31b is composed of a pin-shaped member, and is arranged on a circumference centering on the support shaft 24 like the guide hole 21b. It protrudes outside the cutting case 21 in parallel to the shaft 27. The first positioning member and the second positioning member according to the present invention are not limited to the first positioning member 31a and the second positioning member 31b in the present embodiment. For example, the pin-shaped member and the pin-shaped member have a bearing. Alternatively, a rotating object such as a collar may be attached. With this configuration, the operation of the switching lever 33 when the cam 32 is released from the state of being locked with the first positioning member or the second positioning member. The load can be reduced.

  A cam 32 is disposed between the first positioning member 31a and the second positioning member 31b and between the switching lever 33 of the arm shaft 27 and the left side plate 21a. The cam 32 includes a first locking groove 32a and a second locking groove 32b formed of hook-shaped constricted portions on both front and rear sides of the middle part of the upper and lower sides, and is formed in a substantially bowl shape in a side view. By the long / short switching rotation of the cam 32, the first locking groove 32a can be alternatively locked with the first positioning member 31a and the second locking groove 32b can be locked with the second positioning member 31b.

  The cam 32 includes guide portions 32c having a smoothly curved outer peripheral edge on both the front and rear sides of the lower portion thereof. The front and rear guide portions 32c guide the locking or unlocking of the first locking groove 32a and the first positioning member 31a, and the second locking groove 32b and the second positioning member 31b. It is formed so as to be continuous with the stop groove 32a and the second locking groove 32b, and can be slidably contacted with the first positioning member 31a or the second positioning member 31b.

  Further, the cam 32 is supported through the arm shaft 27 at substantially the center, and is fixed to the arm shaft 27 so as not to rotate relative to the arm shaft 27. When the arm shaft 27 is moved while being rotated along the guide hole 21b, the cam 32 is moved while being rotated integrally with the arm shaft 27, and the first locking groove 32a causes the first to move. It can be locked to the positioning member 31a or to the second positioning member 31b by the second locking groove 32b.

  As shown in FIG. 6, when the cam 32 is locked to the first positioning member 31a by the first locking groove 32a, the arm shaft 27 is guided to the front end of the guide hole 21b, and the upper and lower arms 26, 25 is in a state of rotating forward about the support shaft 24, and is fixed at a separation position P1 where the second rotary shaft 23 is separated from the first rotary shaft 22, that is, a position where the cutting length of the waste is long. The

  As shown in FIG. 8, when the cam 32 is locked to the second positioning member 31b by the second locking groove 32b, the arm shaft 27 is guided to the rear end of the guide hole 21b, and the upper and lower arms are moved. The second rotating shaft 23 is fixed in a proximity position P2 where the second rotating shaft 23 is close to the first rotating shaft 22, that is, a position where the cutting length is short.

  In such a configuration, when the second rotating shaft 23 is set to the separation position P1, the cam 32 is locked to the first positioning member 31a by the first locking groove 32a, and the arm shaft 27 is connected to the front end of the guide hole 21b. The switch lever 33 extends rearward and downward from the arm shaft 27. In this state, when the switching lever 33 is rotated in the clockwise direction in FIG. 6 as the switching operation of the length of excretion cutting, first, the cam 32 is rotated together with the arm shaft 27, and the first locking groove. The locked state of 32a and the first positioning member 31a is released.

  When the switching lever 33 is further rotated in the same direction, the front guide portion 32c of the cam 32 is next pushed while sliding on the first positioning member 31a, and as shown in FIG. 27 is moved from the front end toward the rear end along the guide hole 21b. Then, the rear guide portion 32c of the cam 32 comes into sliding contact with the second positioning member 31b, and the second locking groove 32b and the second positioning member 31b are locked as shown in FIG.

  Simultaneously with the movement of the arm shaft 27, the upper and lower arms 26, 25 are rotated about the support shaft 24 in the clockwise direction in FIG. 6, and the second rotary shaft 23 supported by the upper and lower arms 26, 25 is moved. Moved backwards. That is, the second rotating shaft 23 is brought close to the first rotating shaft 22. Thus, the distance between the first rotating shaft 22 and the second rotating shaft 23 is set to be short, and the second rotating shaft 23 is fixed at the proximity position P2 by the locking of the cam 32 to the second positioning member 31b. Is done.

  Thus, the second rotary shaft 23a on the second rotary shaft 23 rotates on the first large-diameter shaft 22 by switching the position of the second rotary shaft 23 from the separation position P1 to the proximity position P2. The waste 22a and the first small-diameter rotary blade 22b are arranged so as to overlap with each other, and the waste cutting length of the waste cut by these rotary blades 22a, 22b, and 23a is a short length that is the length of the width L1 in FIG. Can be switched.

  On the other hand, when the second rotating shaft 23 is set to the proximity position P2, the cam 32 is locked to the second positioning member 31b by the second locking groove 32b, and the arm shaft 27 is guided to the rear end of the guide hole 21b. The switching lever 33 extends downward from the arm shaft 27. In this state, when the switching lever 33 is rotated counterclockwise in FIG. 6 as a switching operation of the length of excretion cutting, first, the cam 32 is rotated together with the arm shaft 27 and the second locking is performed. The locked state between the groove 32b and the second positioning member 31b is released.

  When the switching lever 33 is further rotated in the same direction, the guide portion 32c on the rear side of the cam 32 is then pushed while slidingly contacting the second positioning member 31b, and as shown in FIG. The shaft 27 is moved from the rear end toward the front end along the guide hole 21b. And the guide part 32c of the front side of the cam 32 is slidably contacted with the 1st positioning member 31a, and as shown in FIG. 6, the 1st latching groove 32a and the 1st positioning member 31a are latched.

  Simultaneously with the movement of the arm shaft 27, the upper and lower arms 26, 25 are rotated about the support shaft 24 in the counterclockwise direction in FIG. 8, and the second rotating shaft 23 supported by the upper and lower arms 26, 25 is rotated. Is moved forward. That is, the second rotating shaft 23 is separated from the first rotating shaft 22. Thus, the distance between the first rotating shaft 22 and the second rotating shaft 23 is set to be long, and the second rotating shaft 23 is fixed at the separation position P1 by the locking of the cam 32 to the first positioning member 31a. Is done.

  Thus, the second rotary shaft 23a on the second rotary shaft 23 rotates on the first large-diameter shaft 22 by switching the position of the second rotary shaft 23 from the proximity position P2 to the separation position P1. It arrange | positions so that it may overlap with only the blade 22a, and the waste cutting length of the waste cut | disconnected by these rotary blades 22a * 23a is switched to the length used as the length of the width | variety L2 in FIG.

  As described above, the first rotary shaft 22 in which the plurality of first large-diameter rotary blades 22a and the first small-diameter rotary blades 22b are alternately fixed with a predetermined interval in the axial direction, and the plurality of the first rotary shaft 22 with a predetermined interval in the axial direction. The second rotary blade 23a is fixed, and the second rotary shaft 23 disposed so as to be close to or away from the first rotary shaft 22 and the second rotary shaft 23 can be switched and fixed to the proximity position P2 or the separation position P1. In the waste cutting apparatus 20 that includes a switching mechanism 30 that can switch the cutting length of the waste, the switching mechanism 30 protrudes from the side plate 21a that supports the first rotary shaft 22 and the second rotary shaft 23. The first positioning member 31a and the second positioning member 31b are disposed between the first positioning member 31a and the second positioning member 31b, and are rotated so that the first positioning member 31a or the second positioning member 31b is rotated. Lock The second rotary shaft 23 and cam 32 to switchable fixed, so equipped and can perform long and short switching operation of the straw discharge cutting length easily by only rotating operation of the switching lever 33. In addition, it is possible to make the switching mechanism 30 for the excision cutting length to have a simple structure, so that the cost can be reduced. Furthermore, the second rotating shaft 23 can be reliably and firmly fixed by the switching mechanism 30.

  The arm shaft 27 is pivotally supported by the upper and lower arms 26 and 25 that support the second rotating shaft 23, the center of the cam 32 is fixed to the arm shaft 27, and the first positioning member 31 a is engaged with both sides of the cam 32. The first locking groove 32a to be stopped, the second locking groove 32b to be locked to the second positioning member 31b, and the first positioning member 31a or the second positioning member 31b are slidably contacted when the cam 32 is switched between long and short. Since the guide portions 32c for rotating the upper and lower arms 26 and 25 are formed, the labor required for switching the length of the excision cutting length, that is, the operating force of the switching lever 33 can be reduced.

The side view which showed the whole structure of the combine which concerns on one Example of this invention. The top view which showed the structure of the exclusion cutting device. The left view which showed the structure of the drive part of a waste cutting device. The left view which showed the structure of the waste cutting device in the case of making a 2nd rotating shaft into a separation position. The left view which showed the structure of the rejection cutting device in the case of making a 2nd rotating shaft into a proximity position. The left view which showed the structure of the switching mechanism in the case of making a 2nd rotating shaft into a separation position. The left view which showed the structure of the switching mechanism in the process which switches a 2nd rotating shaft to a separation position and a proximity position. The left view which showed the structure of the switching mechanism in the case of making a 2nd rotating shaft into a proximity position.

DESCRIPTION OF SYMBOLS 1 Combine 20 Removal | elimination cutting device 21a Side plate 21b of a cutting case Guide hole 22 1st rotating shaft 22a 1st large diameter rotating blade 22b 1st small diameter rotating blade 23 2nd rotating shaft 23a 2nd rotating blade 24 Support shaft 25 Lower arm 26 Upper arm 27 Arm shaft 30 Switching mechanism 31a First positioning member 31b Second positioning member 32 Cam 32a First locking groove 32b Second locking groove 33 Switching lever

Claims (1)

A first rotary shaft in which a plurality of first large-diameter rotary blades and first small-diameter rotary blades are alternately fixed at predetermined intervals;
A plurality of second rotary blades fixed at a predetermined interval, and a second rotary shaft arranged so as to be close to or away from the first rotary shaft;
And a switching mechanism that can switch and fix the second rotating shaft to a proximity position or a separation position, and a waste cutting apparatus that can switch the cutting length of the waste in a short and long manner,
The switching mechanism is
A first positioning member and a second positioning member projecting from a side plate supporting the first rotating shaft and the second rotating shaft;
A cam that is arranged between the first positioning member and the second positioning member and is rotated and locked to the first positioning member or the second positioning member so that the second rotation shaft can be switched and fixed. And comprising
An arm shaft is pivotally supported by an arm that supports the second rotating shaft, a center of the cam is fixed to the arm shaft, and first locking grooves that are locked to the first positioning member on both sides of the cam. Forming a second locking groove for locking to the second positioning member and a guide portion for slidingly contacting the first positioning member or the second positioning member and rotating the arm when the cam is switched between long and short. A waste cutting device characterized by the above.

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