JP3672916B2 - Straw cutting blade in threshing section - Google Patents

Description

  The present invention relates to an improvement of a straw cutting blade that is provided at a position opposite to a saw drum of a combine or a threshing machine and shreds straw debris.

  When threshing is carried out by the tooth of the rotating cylinder in the saw room, the root of the rice is held and held by a transport chain or the like, but considerable straw waste is generated.

  For example, as shown in FIGS. 1 and 2, a U-shaped straw cutting blade H is provided in the saw chamber so that the straw scraps are not caught on the saw teeth.

  The straw cutting blade H has a configuration in which an uneven blade edge 3 is provided on a curved upper edge of a blade plate portion 2 projecting from the left and right of the mounting portion 1 so that the tooth 6 passes between the blade plate portions 2. It is fixed at a position facing the saw drum 4.

  Therefore, if this straw cutting blade is not well cut, the shredding of the straw waste will be insufficient, so that the discharge of straw waste will be worse and the blowing power must be increased. Since the load also increases, the straw discharge efficiency is poor.

  Therefore, in a combine and a threshing machine, it is important to improve the threshing efficiency by adjusting the rotation of the saw barrel and improving the teeth, and at the same time, the quality of the straw cutting blade that shreds the straw during threshing is extremely important.

  However, since the straw cutting blade has been relatively neglected so far, it has merely formed an uneven blade edge that can cut the straw on the curved upper edge of the blade plate portion.

  That is, since it is difficult to grind the conventional uneven edge with a single grinding, it is difficult to form an uneven edge (jagged tooth) as shown in FIGS. An uneven surface is formed by forming a rough surface by pressing the blade edge forming portion of the blade plate portion, and by grinding (grinding) the uneven surface obliquely with respect to the plate surface to form a sharp edge. 3 is formed.

  In other words, after forming an uneven surface by pressing on the blade edge forming side portion that becomes the blade plate portion of the plate material, the blade plate portion 2 is provided in a juxtaposed state by bending it into a U shape, and this blade plate portion after quenching In order to make the plate thickness of 2 sharp, the upper edge of the blade plate portion 2 is attached with a blade by gliding so that the gliding surface is inclined inward from the outer side of the blade plate portion 2 to the blade plate portion plate surface. A sharp uneven edge 3 is formed in the part.

  However, since the conventional straw cutting blade easily attaches the concavo-convex blade edge 3 by such a method, even if it is an concavo-convex blade and the blade edge is sharpened by gliding, the top 3A of the concavo-convex blade edge 3 and the valley Since the part 3B is a concavo-convex blade, it becomes a blade edge that enters and exits from side to side (not a blade edge on the same line), and the sharpness is not sufficient.

  That is, when viewed from directly above the blade edge as shown in FIG. 9 (when the blade plate portion is viewed from the plate surface direction (direction in which the plate thickness is viewed)), the top 3A and the valley 3B with respect to the blade edge formation direction. Are not on a straight line (on the same plane), but the top 3A and the valley 3B are formed with the same line cutting edges because the top and bottom 3A and the valley 3B are shifted to the left and right with respect to the blade edge forming direction. No sharpness like a razor is produced.

  The present invention re-examines the importance of straw cutting blades that have been neglected so far, improving straw discharge efficiency, degrading the performance of the saw drum, reducing the load on the saw drum and reducing the load on the blower power. In order to provide a breakthrough combine and threshing machine with excellent practicality, it breaks the fixed idea so far, and it is a simple method with uneven edges, but unevenness goes in and out The purpose is to provide an innovative straw cutting blade in a threshing section in which unevenness is arranged in a straight line on the same plane in the blade edge forming direction, and the straw can be shredded well with a razor-like taste. .

  The gist of the present invention will be described with reference to the accompanying drawings.

It is a straw cutting blade H disposed at a position opposite to the saw barrel 4 of the threshing portion, and the plate material is bent into a U-shape and the blade plate portions 2 are provided in a juxtaposed manner on the left and right sides of the mounting portion 1. In the straw blade H in which the edge portion of the blade plate portion 2 has an uneven blade edge 3 in which the top portion 3A and the valley portion 3B are continuous from the base end portion to the protruding tip portion, this blade plate portion 2 is not a blade edge in which the top part 3A and the valley part 3B enter and exit from the left and right, respectively, when viewed from the plate surface direction (direction in which the plate thickness is viewed) of the blade plate part 2, but the top part 3A and the valley part 3B. Are located on the same plane, and the top and bottom 3A and the trough 3B are arranged in a straight line in the blade edge forming direction when viewed from the plate surface direction of the blade plate portion 2 (the direction in which the plate thickness is viewed). formed on the uneven surface was pressed form the inclined bent portion with an uneven cutting edge forming side portions serving as the blade plate portion 2 of the plate material inclined bent, the plate of the plate material Those of the straw cutter in the threshing unit, characterized in that the formation of the inclined bent portion 5 the uneven blade edge 3 gliding the the formation of the uneven surface along.

Further, the inclined bent portion 5 is configured to bend inwardly toward the outer side or the inner side of the parallel blade plates 2, and the inclined bent portion 5 is formed along the outer surface or inner surface of the blade plate portion 2. those of the straw cutter in the threshing section of claim 1, wherein a by gliding the formation of the concavo-convex blade edge 3 wherein each blade plate 2.

Also, after the concave and convex edge forming side of the portion of the plate material that is the blade plate portion is inclined and bent in the outward or inward direction, the uneven surface is press-formed in the inclined and bent portion, and then the plate material is U-shaped. The blade plate 2 provided with the inclined bent portion 5 which is inclined and bent on the left and right sides of the mounting portion 1 and has an uneven surface is formed side by side. The top 3A and valley 3B are continuously formed on the same plane as the outer or inner surface of the blade plate 2 by gliding the inclined bent portion 5 along the outer or inner surface of the portion 2 so as to be flush with the outer or inner surface. The said uneven | corrugated blade edge | tip 3 was formed, It concerns on the straw cutting blade in the threshing part of Claim 2 characterized by the above-mentioned.

  Since the present invention is configured as described above, the concavo-convex edge is not easily moved to the left and right while being a concavo-convex edge by a simple method, and the concavo-convex, that is, the top and the valley are in a straight line in the edge formation direction (identical Because it is located on a flat surface, the straw can be shredded well with a razor-like sharpness. Therefore, the cutting resistance is remarkably reduced and the cutting condition is good compared with the conventional straw cutting blade. Since the sustainability is improved, the straw discharge efficiency is improved, the performance of the saw drum is not degraded, the load on the saw drum is reduced, and the power load on the blower is also reduced. It becomes a combine and threshing machine, and can provide an innovative combine and threshing machine with excellent practicality.

In the invention of claim 2, 3 Symbol mounting, can be realized easily present invention in a more simple method.

Moreover, in the invention of 請 Motomeko 2,3 described, the inclined bent portion projecting outwardly or inner surface direction and gliding along the outer surface or inner surface of the blade plate portion, realize a uneven cutting edges of the cutting taste Therefore, instead of tilting the blade plate and gliding, the part that forms the irregular blade edge is bent outward or inward, and the part that protrudes outward or inward (inclined bending) Section) is projected along the outer or inner surface of the blade plate part from the base end to the protruding tip or from the protruding tip to the base end. As a result, the durability and breakage strength can be remarkably improved as compared with the conventional case, and damage to the saw drum can be prevented.

  Therefore, it is a structure that can also exhibit such an effect of improving the strength, and as described above, the uneven blade edge can be easily formed from the base end portion to the protruding distal end portion (also on the curved edge), and the top of the uneven portion The troughs do not go in and out on the left and right sides, but can be a straight edge when viewed from the same plane (on the outer surface of the blade plate part), like a razor while being an uneven blade It becomes a straw cutting blade in an epoch-making threshing part that can easily realize the cutting quality by a simple method.

  An embodiment of the present invention (how to carry out the invention) considered to be suitable will be briefly described with reference to the drawings, showing its effects.

  In the present invention, although it is the uneven edge 3 in a simple manner, the unevenness does not enter and exit left and right, and the unevenness, that is, the top 3A and the valley 3B are in a straight line (on the same plane) in the blade edge forming direction. Because of the position, the straw can be shredded well with a sharpness like a razor.

  Therefore, since the cutting condition is significantly better than the previous straw cutting blade, the straw discharge efficiency is improved, the performance of the saw drum is not deteriorated, the load on the saw drum is also reduced, and the power load on the blower is also reduced. It will be possible to provide innovative combine harvesters and threshers with excellent practicality.

  In addition, since the grinding (grinding) is performed along the plate surface of the blade plate portion 2, the grinding is not only easily performed, but also the inclined bent portion 5 that is inclined outwardly or inwardly (having an uneven surface). Only the outer surface or the inner surface is ground, so that the base end portion of the blade plate portion 2 that does not form the blade edge is not ground.

  That is, in the conventional gliding, the grindstone is inclined inward with respect to the outer surface of the blade plate portion 2 to perform gliding from the outside of the blade plate portion 2, so that the base end portion of the blade plate portion 2 that does not form the uneven blade edge 3 is also inclined. Therefore, the thick part of the base end part of the blade plate part 2 is cut (thinned to the corner part. Refer to FIG. 8). Therefore, the strength is inferior, and cracks are generated and broken from here, and the saw drum is also damaged due to breakage of the straw cutting blade.

  However, the present invention does not incline and perform gliding, but the portion forming the concave and convex edge 3 is inclined outward or inward, and the portion that protrudes outward or inward (inclined bent portion 5). ) Is projected from the base end along the outer surface or inner surface (non-bent plate surface) of the blade plate part 2 or from the projecting front end to the base end, so that the corner portion remains at the original plate thickness. In addition, since the thickness of the corner portion can be ensured, the durability and breakage strength can be remarkably improved as compared with the conventional case, thereby preventing damage to the saw drum.

  Therefore, it is a structure that can also exhibit such an effect of improving the strength, and as described above, the uneven blade edge 3 can be easily formed from the base end portion to the projecting tip portion (also on the curved edge), and the top of the uneven portion. 3A and trough part 3B do not go in and out at all right and left, and can be made into a blade edge arranged in a straight line on the same plane (on the outer surface of the blade plate part 2) and viewed from directly above, while being an uneven blade It becomes a straw cutting blade in an epoch-making threshing part that can easily realize a razor-like sharpness by a simple method.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, as shown in FIG. 3 to FIG. 5, the plate material is formed in a U-shape and the blade plate portions 2 are provided in a juxtaposed manner on the left and right sides of the mounting portion 1. The curved upper edge of the portion 2 is an embodiment applied to a straw cutting blade H in which a concavo-convex edge 3 in which a top portion 3A and a valley portion 3B are continuous from a base end portion to a protruding tip portion, In this embodiment, as shown in FIG. 6, the concave and convex edge forming side of the portion that becomes the blade plate portion 2 of the plate material by the press working is inclined and bent in the direction that becomes the outer direction when the blade plate portion 2 is formed. At the same time, an uneven surface is press-formed at the inclined bent portion during the pressing to form the inclined bent portion 5.

  That is, by bending the plate material in a U-shape, the portions to be the blade plate portions 2 that are arranged side by side are inclined and bent in the direction of the outer direction, and the uneven surface is formed by embossing. An inclined bent portion 5 is formed.

  Then, after the inclined bent portion 5 is press-formed, the plate material is bent into a U-shape, and the inclined bent portion having an uneven surface that is inclined outward on the left and right sides of the attachment portion 1 respectively. After the blade plate portion 2 provided with the portion 5 is formed side by side and quenched, it is inclined along the parallel outer surface of the blade plate portion 2 so that the outer surface of the blade plate portion 2 and the gliding surface are flush with each other. The concave and convex edge 3 in which the top 3A and the valley 3B are continuously formed on the same plane as the outer surface of the blade plate portion 2 is formed by gliding the bent portion 5.

  Accordingly, in this embodiment, the uneven edge 3 is not easily moved in the right and left directions, but the unevenness, that is, the top 3A and the valley 3B are in a straight line in the blade edge forming direction (the blade plate). Therefore, the straw can be shredded satisfactorily with a sharpness like a razor.

  Rather than tilting and gliding, the portion that forms the concave and convex edge 3 is inclined outward and the portion that protrudes outward (inclined bent portion 5) is the outer surface of the blade plate portion 2. In order to perform the gliding from the base end to the protruding tip along the edge, the original thickness is maintained without cutting the plate thickness to the base end where the corner portion is unnecessarily glided and used as a blade edge. In addition, since the thickness of the corner portion can be secured, the durability and breakage strength can be remarkably improved as compared with the conventional case, thereby preventing the saw barrel from being broken.

  Further, in FIG. 7, the portion that forms the uneven blade edge 3 is inclined inward, and the portion that protrudes inward (inclined bent portion 5) is ground along the inner surface of the blade plate portion 2. In the same manner, the uneven edge is not easily moved left and right, but the unevenness, that is, the top 3A and the valley 3B are in a straight line in the blade edge forming direction (the blade plate 2 of the blade plate 2). Because it is located on a vertical plane, the straw can be shredded well with a razor-like sharpness, and the corner portion is unnecessarily glided to cut the plate thickness to the base end that does not become the blade edge. It is possible to maintain the original thickness without sagging, and to secure the thickness of the corner, which can significantly improve durability and breakage strength compared to conventional ones. It can also prevent the body from being damaged. Shows another embodiment has.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

FIG. 5 is an explanatory side view showing a usage state of the straw cutting blade H. FIG. 5 is an explanatory plan view showing a use state of the straw cutting blade H. It is a perspective view of a present Example. It is a top view of a present Example. It is front sectional drawing of a present Example. It is explanatory sectional drawing which shows the manufacture procedure (formation method of the inclination bending part 5) of a present Example. It is a perspective view which shows another Example (2nd Example) of this invention. It is a perspective view of a prior art example. It is a top view of a prior art example. It is a front sectional view of a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attaching part 2 Blade plate part 3 Uneven edge 3A Top part 3B Valley part 4 Saw body 5 Inclined bending part H Straw cutting blade

Claims (3)

It is a straw cutting blade disposed at a position opposite to the saw shell of the threshing part, and the plate material is bent into a U shape and the blade plate part is provided in a juxtaposed manner on the left and right of the mounting part, At the edge of this blade plate portion, the uneven blade edge of this blade plate portion is defined as the blade plate in the straw cutting blade H in which the top portion and the valley portion are continuous from the base end portion to the protruding tip portion. The plate surface of the blade plate portion with the top portion and the valley portion positioned in the same plane, not the blade edges where the top portion and the trough portion enter and exit from the left and right respectively, as viewed from the plate surface direction (direction in which the plate thickness is viewed) The concave and convex edge forming side of the portion of the plate material that forms the blade plate portion, with the top and valley portions as viewed from the direction (the direction in which the plate thickness is viewed) is arranged in a straight line in the blade edge forming direction And the uneven surface is press-formed on the inclined bent portion, and the inclined bent portion formed with the uneven surface along the plate surface of the plate is gliding. Straw cutter in the threshing unit, characterized in that the formation of the concavo-convex blade edge Te.   The inclined bent portion is configured to be bent in an outward direction or an inner direction of the parallel blade plates, and each of the inclined bent portions is glided along an outer surface or an inner surface of the blade plate portion. The straw cutting blade in the threshing portion according to claim 1, wherein the uneven blade edge is formed on the blade plate portion.   After the concave and convex blade edge forming side of the portion of the plate material that is to be the blade plate portion is bent in an outward or inward direction, a concave and convex surface is press formed in the inclined bent portion, and then the plate member is folded in a U shape. The blade plate portion provided with the inclined bent portion having the concave and convex surfaces which are inclined and bent to the left and right of the attachment portion, respectively, is formed side by side, and the outer surface or inner surface of this blade plate portion The concave and convex blade edge in which the top and valley portions are continuously formed on the same plane as the outer surface or inner surface of the blade plate portion is formed by gliding the inclined bent portion so as to be flush with the outer surface or inner surface along The straw cutting blade in the threshing part according to claim 2.

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