JP4639221B2 - Threshing device - Google Patents

Description

  The present invention relates to a threshing apparatus such as a combine or a harvester, and in particular, a threshing apparatus provided with a dust feeding guide on the inner surface side of a handling chamber to adjust the feeding speed of the treated product by contacting the treated product flowing in the handling chamber. About.

A threshing device is known in which a dust feed guide is provided on the inner surface side of the handling chamber to adjust the feed rate of the treated product by contacting the treated product flowing in the handling chamber (for example, see Patent Documents 1 to 3). Among these, in particular, in the threshing device shown in Patent Document 3, the opening degree of the processed material to the flow path can be changed based on the rotation of the dust feeding guide with the one end side as a fulcrum. The dust feed guide is maintained at the initial opening by the biasing force of the biasing member, and when the load received from the processed material is large, the dust feeding guide is configured to retreat and rotate against the biasing force of the biasing member. Yes. In this way, the feed rate of the processed material can be automatically adjusted according to the load in the handling chamber, which not only improves the threshing performance, but also prevents clogging of the processed material and breakage of parts due to overload. It becomes possible to do.
Japanese Patent Laid-Open No. 2003-274738 JP 2001-169645 A Japanese Utility Model Publication No. 61-45789

  However, in the threshing apparatus described in Patent Document 3, since the dust feeding guide is urged by the tension coil spring, the tension coil spring extends in any direction from the dust feeding guide position, and the dust feeding guide There was a problem that the entire guide device would be enlarged.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 is directed to an inner surface side of a handling chamber and a processed material flowing in the handling chamber. While providing a dust feed guide that contacts and adjusts the feed rate of the processed material, the opening degree of the processed material with respect to the flow path can be changed based on rotation about the one end side of the dust feed guide, Further, the threshing that keeps the dust-feeding guide at the initial opening degree by the biasing force of the biasing member and retreats and turns the dust-feeding guide against the biasing force of the biasing member when the load received from the processed material is large. In the apparatus, the biasing member is a torsion coil spring, and when the coil center of the torsion coil spring and the rotation center of the dust feed guide are set at the same position, the torsion coil spring has a predetermined winding angle from both ends of the coil portion. Exist and extend It has one arm part and a second arm part, and the first arm part is fixed to the fixed part, while the second arm part is engaged with the dust feed guide to urge the dust feed guide, The dust feed guide is held at the initial opening degree by the second arm portion in the free length state, and includes a fixing position changing means for changing the fixing position of the first arm portion, and the first arm portion of the first arm portion by the fixing position changing means The threshing device is characterized in that the initial opening degree of the dust feed guide is adjusted based on the position change . In this case, the dust feed guide is urged by the torsion coil spring, so that the dust feed guide device can be made compact compared to the case where the dust feed guide is urged by the tension coil spring. Moreover, since the coil center of the torsion coil spring and the rotation center of the dust feed guide are set at the same position, the dust feed guide device can be further downsized. In addition, since the dust feed guide is held at the initial opening using the free length state of the torsion coil spring, a dedicated part for holding the dust feed guide at the initial opening is not required, reducing the number of parts and simplifying the structure. Can be planned. In addition, it is possible to adjust the initial opening of the dust feed guide by adding a simple structure that allows the fixed position of the first arm portion to be changed.
The invention of claim 2 is a threshing apparatus according to claim 1 Symbol mounting, characterized in that it comprises the opening viewing means allowing visible outside from Okuchiri guide opening of the threshing chamber. In this way, not only the operation of the dust guide can be confirmed visually, but also the load status of the handling chamber can be confirmed based on the opening degree of the dust guide and used as a guideline for adjusting the work speed.

  According to the present invention as described above, since the dust feed guide is urged by the torsion coil spring, the dust feed guide device can be made compact compared to the case where the dust feed guide is urged by the tension coil spring. Moreover, since the coil center of the torsion coil spring and the rotation center of the dust feed guide are set at the same position, the dust feed guide device can be further downsized.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a combine equipped with the threshing device of the present invention, and the combine 1 includes a pre-processing unit 2 that cuts off the stems and a threshing unit 3 that threshs and sorts the grains from the cut off stems. , A grain tank 4 for storing the selected grains, a discharge auger 5 for discharging the grains in the grain tank 4 to the outside of the machine, a post-processing unit 6 for post-processing the threshed waste, and operation It comprises a seat 7 and a control unit 8 on which various operation tools are arranged.

  As shown in FIG. 2, the threshing unit 3 includes a threshing feed chain 9 that holds the stem base of the stalk and conveys it backward, and a handling chamber 10 into which the tip side of the stalk that is carried by the threshing feed chain 9 is introduced. And a handling cylinder 11 that is rotatably mounted in the handling chamber 10 and that threshs the grain from the tip side of the stem with a handling tooth 11a provided on the outer periphery, and is provided along the lower side of the handling cylinder 11. A receiving net 12 that mainly causes the grains to leak from the handling chamber 10 and a sorting room 13 that sorts the grains that have leaked from the receiving net 12 are configured.

  The upper part of the handling chamber 10 is covered with a cylinder cover 14 that can be freely opened and closed. When the cylinder cover 14 is opened, the handling chamber 10 is opened, and the handling chamber 10 can be cleaned, inspected, and maintained. It becomes possible. And the dust feed guide 15 which is the principal part of this invention is provided in the lower surface side of the cylinder cover 14, ie, the inner surface side of the handling chamber 10. FIG.

  The dust feed guide 15 is a member that adjusts the feed speed (feed speed in the barrel rotation axis direction) of the treated product by contacting the treated product flowing in the handling chamber 10, and rotates around one end side thereof. Based on this, the opening degree of the processed material with respect to the flow path (see the arrow in FIG. 3) can be changed. Further, an urging member is connected to the dust feed guide 15 to maintain the dust feed guide 15 at the initial opening by the urging force of the urging member, and when the load received from the processed material is large, the urging member is energized. The dust feeding guide 15 is configured to retract and rotate against the force.

  For example, as shown in FIG. 3 (A), when the dust feed guide 15 is in a posture to close the flow path of the processed material, the speed of feeding the processed material to the rear becomes slow. When the time for receiving the threshing action becomes long and the load received from the processed material is large, the dust feeding guide 15 is retracted against the urging force of the urging member as shown in FIG. By moving it, it is possible to increase the feed rate of the processed material and to improve the scraping of sawdust and the like.

  Incidentally, the situation where the load becomes large is likely to occur when processing a material with a lot of moisture (blue material, lodging material, wetting material, etc.). The reason for this is that a material with much moisture is more likely to be broken than a dried material, and a large amount of broken folds are generated and the inside of the handling chamber 10 is likely to be saturated. In such a situation, when the dust supply guide 15 is retracted and rotated, the transfer of the processed material can be speeded up and the debris can be improved.

  According to such a dust feed guide 15, the feed speed of the processed material can be automatically adjusted according to the load in the handling chamber 10, so that not only the threshing performance is improved, but also the clogging of the processed material It becomes possible to prevent damage to parts due to overload.

  Next, the configuration of the dust feed guide device 16 including the dust feed guide 15 and the urging member will be described with reference to FIGS. As shown in these drawings, the dust feed guide device 16 includes a dust feed guide 15, a mounting bracket 17, a torsion coil spring 18, a cover 19, and the like.

  The dust feed guide 15 integrally includes a pair of dust feed guide portions 15a arranged in parallel at a predetermined interval and a connecting portion 15b that connects the pair of dust feed guide portions 15a, and one end of the connecting portion 15b. The part is connected to the mounting bracket 17 via a bearing 20 and a fulcrum shaft 21. As a result, the dust feed guide 15 is rotatably supported around the fulcrum shaft 21.

  The mounting bracket 17 is a plate member that is mounted to the cylinder cover 14 so as to close the mounting hole 14a formed in the cylinder cover 14, and is fixed at the center to support the fulcrum shaft 21 in a penetrating manner. The boss 22 is erected integrally.

  The torsion coil spring 18 is used as a biasing member that biases the dust feed guide 15. As described above, when the dust feed guide 15 is biased by the torsion coil spring 18, the dust feed guide device 16 can be configured more compactly than when the dust feed guide 15 is biased by the tension coil spring. Moreover, the torsion coil spring 18 is arranged such that the coil center is located at the same position as the rotation center of the dust feed guide 15. Thereby, it is possible to further downsize the dust feeding guide device 16.

  More specifically, the torsion coil spring 18 includes a coil portion 18a, and a first arm portion 18b and a second arm portion 18c that extend from both ends of the coil portion 18a with a predetermined winding angle. The coil portion 18a is rotatably supported on the outer periphery of the boss 22, the first arm portion 18b is fixed to the cover 19 via the shaft 23, and the second arm portion 18c is provided on the dust feed guide 15. By engaging with the pin 24, the dust feed guide 15 is urged in a predetermined direction.

  In the dust feed guide device 16 of the present embodiment, the dust feed guide 15 is held at the initial opening degree by the second arm portion 18c in the free length state. Specifically, the distal end portion of the second arm portion 18 c is formed into a hook shape or a ring shape, and this is engaged with the pin 24. In this way, since the dust feed guide 15 can be held at the initial opening by utilizing the free length state of the torsion coil spring 18, a dedicated part for holding the dust feed guide 15 at the initial opening becomes unnecessary. The number of parts can be reduced and the structure can be simplified.

  The mounting bracket 17 is formed with a pin through hole 17a through which the pin 24 passes. The pin through-hole 17a is an arc-shaped long hole centered on the fulcrum shaft 21, and the rotation range of the dust feed guide 15 is limited by the pins 24 coming into contact with both ends thereof.

  Further, the dust feeding guide device 16 of the present embodiment includes an opening degree visualizing means that makes it possible to visually recognize the opening degree of the dust feeding guide 15 from the outside of the handling chamber 10. The opening visually recognizing means of the present embodiment is a pin visual recognition hole 19a formed in the cover 19, and based on the tip end position of the pin 24 protruding from the pin visual recognition hole 19a to the outside of the cover 19, The opening can be visually confirmed. In this way, not only the operation of the dust feed guide 15 can be confirmed visually, but also the load status of the handling chamber 10 can be confirmed based on the opening of the dust feed guide 15 and used as a guideline for adjusting the work speed. . The pin visual recognition hole 19a is not a simple round hole or the like, but is preferably an arc-shaped long hole with the fulcrum shaft 21 as the center, like the pin through hole 17a. In this way, the position and movement of the pin 24 can be easily understood, so that the opening degree of the dust feed guide 15 can be accurately recognized.

  Further, the dust feeding guide device 16 of the present embodiment includes a fixed position changing means for changing the fixing position of the first arm portion 18b of the torsion coil spring 18, and the first arm portion 18b is changed by the fixing position changing means. Based on this, the initial opening degree of the dust feed guide 15 is adjusted. In this embodiment, the shaft through hole 19b formed in the cover 19 is a long hole centered on the fulcrum shaft 21 so that the shaft 23 can be moved, and a nut 25 with a knob is screwed onto the shaft 23, By tightening the nut 25 with the knob, the shaft 23 can be fixed at an arbitrary position. If it does in this way, it will become possible to adjust initial opening degree of dust feed guide 15 by simple structure addition of the grade which can change the fixed position of the 1st arm part 18b.

  When the initial opening degree adjustment of the dust feed guide 15 is performed based on the position change of the first arm portion 18b, the length of the shaft through hole 19b is about the same as that of the pin through hole 17a. As indicated by the phantom line, the shaft through hole 19b may be extended in the direction in which the opening of the dust feed guide 15 is closed. In this way, the initial opening degree of the dust feed guide 15 is adjusted to the minimum opening degree, and further, the urging force of the torsion coil spring 18 is increased by moving the shaft 23 to the closing side, so that the dust feed guide 15 The initial biasing force can be adjusted.

  The nut with knob 25 may be removed from the shaft 23 and replaced with the pin 24 side as shown in FIG. In this way, the pin 24 can be fixed at an arbitrary position by tightening the nut 25 with the knob, so that the dust feed guide 15 can be fixed and the fixing position can be adjusted.

  As shown in FIG. 8, the shaft 23 is configured integrally with a shaft portion 23a and a screw shaft portion 23b protruding upward from the upper end of the shaft portion 23a, and is formed in the shaft portion 23a. After the first arm portion 18b of the torsion coil spring 18 is inserted into the arm insertion hole 23c, the screw shaft portion 23b is exposed to the outside through the shaft through hole 19b of the cover 19, and the nut 25 with a knob is tightened here. The first arm portion 18b of the torsion coil spring 18 is fixed.

  In the present embodiment, the position of the center of gravity of the shaft 23 is set below the arm insertion hole 23 c, and the lower end surface of the shaft 23 is brought close to the upper surface of the mounting bracket 17. In this way, when the shaft 23 is assembled, not only the vertical rotation of the shaft 23 is suppressed, but also the tilting of the shaft 23 is restricted by the contact with the mounting bracket 17, so that the assembling property can be improved. it can.

  Further, in the present embodiment, an arc-shaped step D (formed using a spot margin of an attachment piece 17b described later) centered on the fulcrum shaft 21 is formed on the upper surface portion of the attachment bracket 17. The step D functions as a guide indicating the distance of the shaft 23 relative to the fulcrum shaft 21, and the shaft 23 is accurately positioned only by aligning the outer end position of the shaft 23 with the step D, and the screw shaft of the shaft 23. The portion 23 b can be easily inserted into the shaft through hole 19 b of the cover 19. Moreover, since the step D restricts the shaft 23 from moving outward, it is possible to avoid the inconvenience that the shaft 23 falls off from the first arm portion 18b of the torsion coil spring 18 and is lost during assembly. it can.

In this embodiment, the shaft D is prevented from coming off by the step D, but the distance L between the wall portion of the mounting bracket 17 (a mounting piece 17b to be described later) and the tip of the first arm portion 18b or the shaft 23. If the diameter R is set as follows, even if there is no step D, the wall of the mounting bracket 17 can be used to prevent the shaft 23 from falling off.
L _MAX <R

  Further, as shown in FIGS. 8B and 8C, a long hole 17c centered on the fulcrum shaft 21 is formed in the mounting bracket 17, and the lower end portion of the shaft 23 is inserted into the long hole 17c. The shaft 23 may be positioned and prevented from being removed.

  Next, the assembly structure of the dust guide apparatus 16 will be described with reference to FIGS. 9 and 10. As shown in FIG. 9, the dust feed guide device 16 is configured as an assembly separate from the chamber main body, and is detachably attached to the mounting hole 14 a of the cylinder cover 14. Specifically, of the components of the dust feed guide device 16, parts such as the dust feed guide 15, mounting bracket 17, torsion coil spring 18, etc., excluding the cover 19 and the nut 25 with knob, are assembled in advance, and this is used as the cylinder cover. After attaching to 14, the cover 19 and the nut 25 with knob are attached. If it does in this way, the assemblability at the time of manufacture can be improved compared with the case where dust sending guide 15 and energizing member are attached individually, respectively. Further, since the dust feeding guide device 16 is detachable, inspection and cleaning are facilitated, and maintainability can be improved. For example, if dust is clogged between the dust feed guide 15 and the mounting bracket 17 and the dust feed guide 15 does not rotate smoothly, the dust feed guide device 16 can be removed as an assembly to easily remove the clogged dust. Can be removed.

  In the present embodiment, a mounting plate (mounting portion) 14b is erected around the mounting hole 14a, and the dust feeding guide device 16 is fixed to the mounting plate 14b. Specifically, a mounting plate 14b having a U-shape in plan view is erected around the mounting hole 14a, while a mounting piece 17b having a square shape in plan view is erected on the outer end portion of the mounting bracket 17, and the mounting piece With the 17b fitted inside the mounting plate 14b, the mounting piece 17b is fixed to the mounting plate 14b by using a bolt 26 that is laterally (parallel to the cylinder cover 14). If it does in this way, compared with the case where dust feed guide device 16 is directly fixed to cylinder cover 14, dust feed guide device 16 can be fixed compactly. In addition, since the dust feed guide device 16 can be positioned and temporarily held by fitting with the mounting plate 14b, the assembly of the dust feed guide device 16 is facilitated.

  In the case of adopting the above-described mounting structure, it is preferable to provide a mounting allowance 14c for mounting the peripheral portion of the dust feeding guide device 16 between the mounting hole 14a and the mounting plate 14b. In this way, by placing the peripheral edge portion of the dust feed guide device 16 on the loading allowance 14c, not only can the dust feed guide device 16 be prevented from falling into the handling chamber 10, but also the mounting hole 14a can be provided in the dust feed guide device. 16 (mounting bracket 17) can be reliably closed, and blowout of dust and the like can be prevented.

  The dust feed guide device 16 attached to the cylinder cover 14 as described above is covered with a cover 19 attached later. At this time, the cover 19 of this embodiment can realize a good appearance by covering the bolts 26 that fix the mounting bracket 17 and the mounting plate 14b. Further, in this embodiment, when the cover 19 is fixed to the mounting plate 14b using the sideways (parallel to the cylinder cover 14) bolt 27, the cover 19, the mounting plate 14b and the mounting bracket 17 are fastened together with the bolt 27. ing. If it does in this way, since cover 19, mounting plate 14b, and mounting bracket 17 will be united and it will function as a reinforcing member of cylinder cover 14, the rigidity of cylinder cover 14 can be raised.

  According to the present embodiment configured as described above, the dust feed guide 15 is provided on the inner surface side of the handling chamber 10 to adjust the feed rate of the treated product in contact with the treated product flowing in the handling chamber 10, Based on the rotation of the dust feed guide 15 with one end side as a fulcrum, the opening of the processed material with respect to the flow path can be changed, and the dust feed guide 15 is opened by the biasing force of the biasing member. In the combine 1 that retracts and rotates the dust feed guide 15 against the urging force of the urging member when the load received from the processed material is large, the urging member is a torsion coil spring 18, and the torsion coil spring Since the coil center of 18 and the rotation center of the dust feed guide 15 are at the same position, the dust feed guide device 16 can be configured more compactly than when the dust feed guide 15 is urged by a tension coil spring. I can Also, the coil center of the torsion coil spring 18, by the same position and the rotation center of Okuchiri guide 15, allowing more compact.

  The torsion coil spring 18 has a first arm portion 18b and a second arm portion 18c that extend from both ends of the coil portion 18a with a predetermined winding angle, and fixes the first arm portion 18b to the fixing portion. On the other hand, the second arm portion 18c is engaged with the dust feed guide 15 to urge the dust feed guide 15, and the second arm portion 18c in the free length state is set to the initial opening degree. Since it is held, it is possible to hold the dust feed guide 15 at the initial opening by utilizing the free length state of the torsion coil spring 18, and as a result, a dedicated part for holding the dust feed guide 15 at the initial opening is unnecessary. Thus, the number of parts can be reduced and the structure can be simplified.

  Moreover, since the fixing position changing means for changing the fixing position of the first arm portion 18b is provided, and the initial opening degree of the dust feeding guide 15 is adjusted based on the position change of the first arm portion 18b by the fixing position changing means. The initial opening degree of the dust feed guide 15 can be adjusted and the structure of the dust feed guide device 16 can be simplified by adding a simple structure that can change the fixed position of the first arm portion 18b.

  Moreover, since the opening degree visualizing means for enabling the opening degree of the dust feeding guide 15 to be visually recognized from the outside of the handling chamber 10 is provided, not only the operation of the dust feeding guide 15 can be visually confirmed but also the opening degree of the dust feeding guide 15 can be adjusted. Based on this, the load state of the handling chamber 10 can be confirmed and used as a guideline for adjusting the work speed.

It is a top view of a combine. It is front sectional drawing of a threshing part. (A) And (B) is an operation explanatory view of a dust feed guide. It is a top view of a dust feeding guide device (with a cover). It is a top view of a dust feeding guide device (without a cover). (A) is side surface sectional drawing of a dust feeding guide apparatus, (B) is a fragmentary sectional view of the dust feeding guide apparatus which shows another example. It is front sectional drawing of a dust feeding guide apparatus. (A) is the elements on larger scale which show the shaft part of a dust feeding guide apparatus, (B) is the fragmentary top view of the dust feeding guide apparatus which shows another example, (C) is a fragmentary sectional view. (A) And (B) is a perspective view which shows the assembly | attachment procedure of a dust feeding guide apparatus. It is a top view of an attachment hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 3 Threshing part 10 Handling chamber 14 Cylinder cover 14a Mounting hole 14b Mounting plate 14c Loading allowance 15 Dust feeding guide 16 Dust feeding guide apparatus 17 Mounting bracket 17a Pin through-hole 17b Mounting piece 18 Torsion coil spring 18a Coil part 18b First arm part 18c Second arm part 19 Cover

Claims (2)

Provided on the inner surface side of the handling chamber is a dust feed guide for adjusting the feed speed of the treated product by contacting the treated product flowing in the handling chamber, and the dust feed guide is based on rotation about one end side thereof. The opening of the processed material with respect to the flow path can be changed, and the dust feed guide is maintained at the initial opening by the urging force of the urging member, and when the load received from the processed material is large, In the threshing device that retracts and rotates the dust feeding guide against the urging force,
When the biasing member is a torsion coil spring, and the coil center of the torsion coil spring and the rotation center of the dust feed guide are at the same position ,
The torsion coil spring has a first arm part and a second arm part that extend from both ends of the coil part with a predetermined winding angle, and fixes the first arm part to the fixing part, while the second arm part Is engaged with the dust feed guide to urge the dust feed guide, and further, the dust feed guide is held at the initial opening by the second arm portion in the free length state,
A fixing position changing means for changing the fixing position of the first arm portion is provided, and the initial opening degree of the dust feed guide is adjusted based on the position change of the first arm portion by the fixing position changing means. Threshing device. Claim 1 Symbol placement threshing device, comprising an opening degree viewing means from the outside visible to Okuchiri guide opening of the threshing chamber.

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