JP2006067911A - Straw cutter structure of threshing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a straw cutter structure of a threshing machine having a circular disk straw cutter placed at the rear end of a threshing machine and supported in a manner rotatable around a vertical post at an end of the cutter and enabling the switching between a cutting action position and a maintenance position opened by rotating backward to simplify and facilitate the switching between the transmission to the straw cutter and the interruption of the transmission and improve the maintenance workability. <P>SOLUTION: An input shaft 32 is protruded from an end of a straw cutter, an intermediate transmission shaft 22 is supported on a supporting frame 21 extended from the rear part of the threshing machine and interlocked to a transmission system of the threshing machine with a chain, the intermediate transmission shaft 22 is interlocked with the input shaft 32 through a releasable geared transmission mechanism 33, and the straw cutter is made to be rotatable around a vertical support in a released state of the engagement of the geared transmission mechanism 33. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waste straw cutting structure provided in a threshing device mounted on a self-removing combine.

As a drainer cutting structure of a threshing device, for example, as shown in Patent Document 1, a disc-shaped draining cutter arranged at the rear end of the threshing device is turned around a longitudinal fulcrum on one end side. A structure is known that is supported so as to be able to swing and can be switched between a cutting action position that is horizontally mounted facing the waste straw conveying path and a maintenance position that is pivotally opened rearward.
Japanese Patent Laid-Open No. 7-123854

  The above-mentioned waste wall cutting structure has the advantage that maintenance work such as removal of clogging of the waste wall cutter, replacement of the receiving blade and cutting blade, or cleaning from the rear of the threshing device can be easily performed from a wide work space. Although it has been put to practical use, there is room for improvement in the drive structure of the exhaust wall cutter.

  That is, generally, the waste straw cutter receives power from the threshing device, and a transmission belt linked to the transmission mechanism of the threshing device is wound around a pulley provided on the input shaft of the waste straw cutter. Therefore, it is necessary to remove the transmission belt wound around the pulley when the exhaust wall cutter is swung and swung, and the operation for that purpose is troublesome.

  The present invention has been made paying attention to such points, and has as its main object to improve the maintenance workability by easily and easily switching between transmission and shut-off to an exhaust wall cutter capable of turning and swinging.

The first invention supports a disc-shaped waste straw cutter provided at the rear end of the threshing device so as to be pivotable around a longitudinal fulcrum on one end thereof, and faces the waste straw transporting path. A draining wall cutting structure of a threshing device configured to be switchable between a cutting action position and a maintenance position that is swiveled to the rear,
An input shaft protrudes from the other end side of the draining cutter, and an intermediate transmission shaft is supported on a support frame extended from the rear part of the threshing device, is wound around a transmission system of the threshing device, and is coupled to the intermediate transmission shaft. The shaft and the input shaft are interlocked and connected via an occlusal transmission mechanism capable of occlusion and detachment, and the draining cutter is configured to be swingable around the longitudinal fulcrum with the occlusion of the occlusal transmission mechanism removed. Features.

  According to the above configuration, prior to turning and swinging the exhaust wall cutter to the maintenance position, the occlusal transmission mechanism is operated to cut off the transmission between the intermediate transmission shaft and the input shaft and maintain the exhaust wall cutter with the intermediate transmission shaft remaining. Swing to the position. When the maintenance work is completed, the exhaust wall cutter is swung and returned to the original cutting action position, and then the occlusal transmission mechanism is operated to interlock the intermediate transmission shaft and the input shaft.

  Therefore, according to the first invention, before and after the swinging cutter is swung and swung, a troublesome operation of detaching the transmission belt wound around the transmission system of the threshing device is unnecessary, and the swirling and swinging draining cutter is possible. It is easy and easy to switch between transmission and shut-off to improve maintenance workability.

According to a second invention, in the first invention,
The transmission endless belt of the winding transmission mechanism equipped in the threshing device is extended and wound around the intermediate transmission shaft.

  According to the above configuration, the endless belt of the winding transmission mechanism that interlocks and connects the various drive shafts of the threshing device can be extended to configure the exhaust wall cutter drive system, so the transmission belt dedicated to the exhaust wall cutter drive can be attached and detached. Thus, the cutter drive structure can be simplified as compared with the conventional transmission structure that is linked to the transmission system of the threshing device.

According to a third invention, in the first or second invention,
The intermediate transmission shaft and the input shaft are configured to be concentrically arranged in a state where the exhaust wall cutter is in the cutting action position, and the occlusal transmission mechanism is mounted and supported on the intermediate transmission shaft or the input shaft The transmission body is shifted in the axial direction so that the intermediate transmission shaft and the input shaft can be switched between a transmission state in which the intermediate transmission shaft and the input shaft are interlocked to be engaged with each other and a non-transmission state in which the interlocking is released. Is.

  According to the above configuration, by shifting the transmission body forward and backward, transmission from the intermediate transmission shaft to the input shaft can be easily and quickly interrupted, resulting in excellent handleability. In addition, since the transmission body is disposed concentrically and disposed between the intermediate transmission shaft and the input shaft, the occlusal transmission mechanism should be configured to be concentric with the intermediate transmission shaft and the input shaft and have a low bulk. Can do.

According to a fourth invention, in the third invention,
The transmission body is constituted by a transmission sleeve that is externally fitted so as to be able to transmit rotation across an intermediate transmission shaft and an input shaft.

  According to the above configuration, the occlusal transmission mechanism can be configured to have a slightly larger diameter than the intermediate transmission shaft and the input shaft, which promotes the above-described effect of the third invention.

A fifth invention is the invention according to any one of the first to fourth inventions,
The occlusal transmission mechanism is biased to the occlusal transmission state.

  According to the above configuration, the transmission state to the waste straw cutter at the cutting action position is stably maintained, and it is possible to avoid the occurrence of clogging of the waste straw due to inadvertent transmission interruption during shredding work. it can.

In a sixth aspect based on the fifth aspect,
Means is provided for locking and holding the occlusal transmission mechanism in the occlusal release state.

  According to the above configuration, the occlusal transmission mechanism can be held against the occlusal biasing action when the draining cutter is swung open, so that the occlusal transmission mechanism is automatically engaged during maintenance work. When the maintenance work is completed, the drainage cutter is returned to the original cutting action position, the latch holding is released, and the occlusal transmission mechanism is returned to the occlusal state again. The effects of the invention are brought about, and the handleability is excellent.

  FIG. 1 shows a side view of a self-removing combine equipped with a waste straw cutting structure for a threshing apparatus according to the present invention, and FIG. 2 shows a plan view of the rear part of the machine body. In this self-decomposing combine, a cutting unit 3 having a plurality of trimming specifications is connected to a front part of a traveling machine body 2 provided with a pair of left and right crawler traveling devices 1 so as to be movable up and down. The apparatus 5 and the grain collection tank 6 are mounted.

  The left side surface of the threshing device 5 is equipped with a feed chain 7 that receives the harvested cereal rice cake that has been conveyed from the harvesting unit 3 in a sideways posture and sandwiches and conveys the rearward with the ear portion inserted into the handling chamber. Further, at the rear part of the threshing device 5, the stock chain 8a for receiving the waste straw that has been threshed and carried out of the handling chamber from the feed chain 7 and obliquely transporting it toward the rear side and the tip side, and the tip locking transport A waste wall conveying device 8 comprising a chain 8 b is provided, and a disc-shaped waste wall cutter 9 is connected to the rear end of the threshing device 5 so as to face the waste wall conveying path F of the waste wall conveying device 8. Yes.

  The waste wall cutter 9 is a disk-shaped receiving blade 11 mounted in parallel at a predetermined lateral pitch on a supply shaft 10 driven at low speed, and a disk-shaped receiving blade 11 mounted in parallel at a predetermined horizontal pitch on a cutting shaft 12 driven at high speed. The cutting blades 13 are opposed to each other and are horizontally supported across the left and right cutter frames 14, and the receiving blades 11 and the cutting blades 13 are driven and rotated inward from each other. During this time, the waste straw supplied in a lying down posture from above is shredded at a predetermined pitch.

  The supply shaft 10 and the cutting shaft 12 are supported on the left and right cutter frames 14 so that the distance between the shafts can be adjusted, and the cutting blades 13 have a large diameter every two (two in this example). It is configured. Therefore, when the distance between the supply shaft 10 and the cutting shaft 12 is reduced, as shown in FIG. 2, all the receiving blades 1 and the cutting blades 13 overlap and fine cutting is performed at the cutting blade arrangement pitch. By increasing the distance between the shafts and allowing only the large-diameter cutting blade 13 to overlap the opposing receiving blade 11, the exhaust wall can be roughly cut at the pitch of the large-diameter cutting blade 13. .

  As shown in FIG. 3, a flow path switching plate 16 that opens and closes the cutter inlet 15 is disposed on the upper portion of the exhaust wall cutter 9 so as to swing up and down around the rear fulcrum p. When the cutter inlet 15 is opened and the cutter inlet 15 is opened, the waste wall is cut into a shredded state, and the flow path switching plate 16 is swung downward and the cutter inlet 15 is closed so that the waste wall is flown. It is configured so as to be in a long straw discharge state in which it flows down along the upper surface of the switching plate 16 and is discharged rearward as it is.

  Further, the waste straw cutter 9 is supported on the rear frame 17 of the threshing device 5 on the tip side so as to be able to swing and swing about a longitudinal fulcrum x. As shown in FIG. As shown in FIG. 6, it is possible to switch between a cutting action position laid horizontally facing the waste straw conveying path F formed on the lower side and a maintenance position opened to the rear as shown in FIG.

  The drive structure of the waste wall cutter 9 will be described below.

  As shown in FIGS. 7 and 8, a support frame 21 extending from the rear portion of the threshing device 5 is provided outside the stocker side of the waste straw cutter 9, and the cutting shaft 12 in the cutter frame 14 is provided on the support frame 21. The intermediate transmission shaft 22 is rotatably supported concentrically with the pulley 23, and the intermediate transmission shaft 22 is provided with a pulley 23 that receives power from the threshing device 5.

  As shown in FIG. 4, on the left side surface of the threshing device 5, the power transmitted from the engine (not shown) to the tang shaft 24 is transmitted to the first screw drive shaft 25, the second screw drive shaft 26, and the sheave case drive shaft. 27, and a dust transmission fan drive shaft 28 is provided with a winding transmission mechanism 30 that transmits a series of transmission belts (transmission endless belts) 29. The transmission belt 29 extends rearward and is wound around the pulley 23. ing. Further, the power transmitted to the dust exhaust fan drive shaft 28 is gear-decelerated by the reduction case 31 to drive the feed chain 7.

  As shown in FIG. 8, the left end portion of the cutting shaft 12 protrudes from the left cutter frame 14 to be an input shaft 32 of the exhaust wall cutter 9, and the input shaft 32 and the intermediate transmission shaft 22 are engaged with each other. As shown in FIG. 7, the input shaft 32 and the supply shaft 10 are interlocked and connected via a chain 34 and speed reduction gears 35 and 36.

  The occlusal transmission mechanism 33 is configured by a spline fitting of a transmission sleeve (transmission body) 37 across the intermediate transmission shaft 22 and the input shaft 32, and the transmission sleeve 37 is engaged with the input shaft 32 by a spring 38. Slide biased into position. The transmission sleeve 37 is engaged with a shift fork 39 that is mounted on the cutter frame 14 so as to swing left and right around the fulcrum Y. The operation lever portion 39a of the shift fork 39 is artificially operated to make the transmission sleeve 37 a spring. The transmission from the intermediate transmission shaft 22 to the input shaft 32 is cut off by shifting to the intermediate transmission shaft side against 38 and releasing the engagement between the transmission sleeve 37 and the input shaft 32.

  The transmission sleeve 37 shifted to a position where the engagement with the input shaft 32 is released is locked to a spring piece 40 attached to the support frame 21 in a cantilever manner, and even if the hand is released from the operation lever portion 39a. The transmission sleeve 37 is locked and held at the occlusal release position.

  The drainer cutting structure of the present invention is configured as described above. During normal harvesting and harvesting operations, the drainer cutter 9 is swung and fixed at the cutting action position, and the transmission sleeve 37 of the occlusal transmission mechanism 33 is fixed. The intermediate wall transmission shaft 22 and the input shaft 32 are engaged with each other to drive the draining cutter 9 with power from the threshing device 5.

  Further, at the time of maintenance work such as removal of clogging of the waste wall cutter 9, replacement of the receiving blade 11 and the cutting blade 13, or cleaning from the rear of the threshing device 5, first, as shown in FIG. By swinging the portion 39a, the transmission sleeve 37 of the occlusal transmission mechanism 33 is shifted to the occlusal release position against the input shaft 32 against the spring 38, and is held by the spring piece 40. 9 is swung around the longitudinal fulcrum X and released.

  When the maintenance work is finished, the waste wall cutter 9 is swung to the original cutting action position again and fixed to the threshing device 5, and then the operation fork 39 is swung largely in the reverse direction (clockwise in FIG. 8). By kicking up the operating piece 40a continuously provided from the spring piece 40, the entire spring piece 40 can be deformed and removed from the transmission sleeve 37, whereby the transmission sleeve 37 slides forward by the spring 38 and the input shaft 32 is moved. To bite.

  [Other Examples]

  (1) As shown in FIG. 9, the fulcrum Y of the shift fork 39 for shifting the transmission sleeve 37 may be provided on the support frame 21 side. In this case, a detent mechanism for holding the shift fork 39 in the occlusal release position may be provided.

  (2) Although not shown, the transmission sleeve (transmission body) 37 may be provided on the input shaft 32 side so that the intermediate transmission shaft 22 is engaged and disengaged.

  (3) As shown in FIG. 10, the occlusal transmission mechanism 33 includes a fixed transmission 41 connected to the input shaft 32 and a movable transmission 42 that is splined to the intermediate transmission shaft 22 so as to be shiftable. It is also possible to implement a claw clutch structure in which the body 42 is engaged with the fixed transmission 41 from the axial direction.

  (4) As shown in FIG. 11, the occlusal transmission mechanism 33 can be implemented with a structure in which the drive gear 43 provided on the intermediate transmission shaft 22 and the driven gear 44 provided on the input shaft 32 are engaged. According to the structure, when the draining cutter 9 is swiveled to the cutting action position, it becomes an occlusal state, and when the draining cutter 9 is pivoted toward the maintenance position, it automatically enters the occlusal release state. An unnecessary operation becomes unnecessary.

Side view of self-removing combine Plan view of threshing device and waste straw processing unit Side view of waste waste processing unit Side view showing transmission structure of threshing device Top view of waste wall cutter Top view of waste wall cutter in the middle of swing opening Plan view of waste wall cutter drive unit Cross-sectional plan view showing occlusal transmission mechanism for waste wall cutter drive Cross-sectional plan view showing another embodiment of the occlusal transmission mechanism Cross-sectional plan view showing another embodiment of the occlusal transmission mechanism Cross-sectional plan view showing another embodiment of the occlusal transmission mechanism

Explanation of symbols

5 Threshing device 9 Waste wall cutter 21 Support frame 22 Intermediate transmission shaft 29 Power transmission endless belt (power transmission belt)
30 Wrap transmission mechanism 32 Input shaft 33 Occlusal transmission mechanism 37 Transmission body (transmission sleeve)
F Waste straw transport path

Claims (6)

A disc-shaped waste wall cutter arranged at the rear end of the threshing device is supported so as to be pivotable around a longitudinal fulcrum on one end side thereof, and a cutting action position laid horizontally facing the waste wall transporting path and It is a draining cutting structure of a threshing device configured to be switchable to a maintenance position that is pivotally opened backward,
An input shaft protrudes from the other end side of the draining cutter, and an intermediate transmission shaft is supported on a support frame extended from the rear part of the threshing device, is wound around a transmission system of the threshing device, and is coupled to the intermediate transmission shaft. The shaft and the input shaft are interlocked and connected via an occlusal transmission mechanism capable of occlusion and detachment, and the draining cutter is configured to be swingable around the longitudinal fulcrum with the occlusion of the occlusal transmission mechanism removed. The waste straw cutting structure of the threshing device characterized.   The waste wall cutting structure of the threshing device according to claim 1, wherein a transmission endless belt of a winding transmission mechanism equipped in the threshing device is extended and interlocked with the intermediate transmission shaft.   The intermediate transmission shaft and the input shaft are configured to be concentrically arranged in a state where the exhaust wall cutter is in the cutting action position, and the occlusal transmission mechanism is mounted and supported on the intermediate transmission shaft or the input shaft The transmission body is shifted in the axial direction so that the intermediate transmission shaft and the input shaft can be switched between a transmission state in which the intermediate transmission shaft and the input shaft are interlocked to be engaged with each other and a non-transmission state in which the interlocking is released. The waste straw cutting structure of the threshing apparatus of Claim 1 or 2.   The draining machine cutting structure of the threshing device according to claim 3, wherein the transmission body is configured by a transmission sleeve that is occluded and fitted so as to transmit rotation between the intermediate transmission shaft and the input shaft.   The draining machine cutting structure of the threshing device according to any one of claims 1 to 4, wherein the occlusal transmission mechanism is biased to an occlusal transmission state.   6. The apparatus according to claim 5, further comprising means for locking and holding the occlusal transmission mechanism in an occlusal release state.

Images