JP2008187939A - Threshing depth-adjusting conveyer of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a threshing depth-adjusting conveyer of a combine harvester which is made to abut against a chain plate with a guide for preventing a threshing depth-adjusting chain from slipping out, when elongation of the threshing depth-adjusting chain is produced. <P>SOLUTION: This threshing depth-adjusting conveyer of the combine harvester, in which the threshing depth-adjusting conveyer 15 for conveying reaped grain straws in a state capable of adjusting threshing depths is disposed, and the threshing depth-adjusting chain 20 is disposed under tension on a driving sprocket 17 and a floated wheel 19 supported on a rearward extended chain frame 23 via an adjusting support rod 27, in a state capable of adjusting the tension of the chain, is disposed with plate-like end guides 30, 31 that cover the upper side or lower side of the floating wheel 19 on the adjusting support rod 27 of the threshing depth-adjusting conveyer 15, and disposing a guide 33 to be made to abut against the threshing depth-adjusting chain 20 that is shifted from the center of a sprocket that guides to the center of the sprocket on the conveyance upstream side ends of the plate-like end guides 30, 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a combine handling depth adjusting and conveying apparatus for preventing chain handling of a handling depth conveying body.

Conventionally, a treatment depth chain is stretched between the front drive sprocket and the rear idler wheel between the cereal carrier and the threshing feed chain that holds and conveys the cereal that has been cut by the cutting blade. There is already known a combined depth adjusting and conveying apparatus for a combine that provides a conveying body and moves the handling depth conveying body in the slimming direction of the cereals that are conveyed backward with the front side as a fulcrum and adjusts the handling depth of the cereals. (For example, refer to Patent Document 1).
In the handling depth transport body of such a handling depth adjusting and conveying apparatus, a handling depth chain is stretched on an idler wheel which is supported on a chain frame extending rearward by a drive sprocket and an adjustable support rod so that the chain tension can be adjusted. In addition, a plate-like chain end guide that covers the upper part of the idler wheel is provided on the adjustment support rod, and the handling depth chain wrapped around the idler wheel is wrapped around the cedar by the end of the handling depth carrier. It is set as the structure which prevents and sends a grain mash to the threshing feed chain side.
Japanese Patent No. 3737337

The handling depth adjusting and conveying apparatus shown in the above-mentioned Patent Document 1 has an advantage that the chain end guide is provided on the adjusting support rod, so that it can be moved together with the idler wheel to easily adjust the chain tension and prevent the winding of the culm. However, the handling depth chain of this handling depth transport body is easy to loose because the drive sprocket is installed in the front, and the grain holding and conveying surface is on the loose side, and if the handling depth chain is extended due to long-term use When the handling depth transport body is operated shallowly with the drive sprocket side as a fulcrum and moves to the stock side in the slimming direction, the handling depth chain is greatly bent upward due to the pulling load that pulls down the grain culm being conveyed downward. The plate is lifted and transported.
At this time, if the chain plate that has been lifted violently touches or rides on the end of the chain end guide on the upper conveyance side, the chain will be detached, the chain end guide and the chain plate may be deformed, There is a drawback that the dynamic load becomes excessive, and the drive unit gear is easily damaged or the handling depth chain is cut.
Further, in order to prevent the chain end guide and the chain plate from coming into contact with each other, if the distance between the two is increased, the conveying protrusion of the chain plate is the end turning portion of the handling deep conveying body, and the cereal and straw scraps fall within the large distance. However, there are problems such as overloading due to wrapping of cereals and clogging of conveyance.

  In order to achieve the above object, the combine handling depth adjusting / conveying device according to the present invention firstly moves the front between the cereal carrier 10 and the threshing feed chain 12 for holding the harvested culm and conveying it backward. A handling depth transport body 15 is provided that moves the cereals to the fulcrum in the slimming direction and transports the cereal so that the handling depth can be adjusted. The handling depth transport body 15 is connected to the front drive sprocket 17 and thereafter. In a combine handling depth adjusting and transporting device configured to stretch a handling depth chain 20 to an idler wheel 19 supported so as to be adjustable in chain tension via an adjustment support rod 27 on a chain frame 23 extending in the direction, The adjustment support rod 27 of the handling depth transport body 15 is provided with plate-like chain end guides 30 and 31 covering the upper or lower side of the idler wheel 19, and at the end of the chain end guides 30 and 31 on the upper transport side, From the sprocket center A feature is that a guide 33 is provided that guides the mishandled chain 20 to the center side of the sprocket by contacting it.

  Secondly, the guide 33 is configured by providing a round bar having a diameter larger than the plate thickness of the chain end guide 30 along the end of the plate-like chain end guides 30 and 31 on the upper side of conveyance. Yes.

  The combine handling depth adjusting and conveying apparatus having the above-described configuration has the following effects. A guide that guides the sprocket center toward the sprocket center side by contacting the end of the plate-shaped chain that covers the upper or lower side of the idler wheel of the deep-handed transport body with the handle deep chain that deviates from the sprocket center. By providing, for example, the handling depth carrier that has caused elongation in the handling depth chain operates on the shallow handling side, and when the handling depth chain is greatly bent upward by a pulling load that pulls down the culm being conveyed downward, Since the chain plate that is lifted up and moves in the conveying direction is brought into contact with the guide and guided to the idler wheel, the cereals can be smoothly conveyed while preventing the chain from coming off.

  By providing a round bar with a diameter larger than the plate thickness of the chain end guide along the end of the plate-shaped chain end guide on the upper side of conveyance, the guide can be easily formed and the chain end guide is made thinner. It is possible to reduce the weight of the handling deep conveyance body by using a simple plate material.

  Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a combine, and a traveling machine body 1 a having a traveling device composed of left and right crawlers is provided with a pre-processing unit 2 that can be raised and lowered at the front, and a threshing device 3 and a control unit 4 are disposed behind it. The engine and the glen tank etc. which are arrange | positioned right and left and which are not illustrated in the rear part of the control part 4 are provided.

  The pre-processing unit 2 of the combine 1 can adjust the handling depth of the grain culm while it is harvesting and transporting a plurality of rows of planted corn straw, and can forward it to the threshing device 3. That is, the pre-processing unit 2 forms a pre-processing unit frame 6 at the tip of the pre-processing unit transmission shaft cylinder 5 that is supported on the traveling machine body 1 a so as to be able to move up and down, and planted cereals are placed on the pre-processing unit frame 6. Divider 7a and pulling device 7 for weeding and pulling, a scraping wheel 8 for scraping the culm raised by the pulling device 7, and a cutting blade 9 for trimming the stock side of the culm below the scoring wheel 8 And the culm transport body 10 that collects and transports the harvested culm backward, and the point that supports the culm tip side of the culm that is nipped and conveyed thereby and feeds it backward toward the cereal supply port of the threshing device 3 A side conveyance body 11 and a handling depth adjustment conveyance device 13 that is installed between the cereal carriage body 10 and the threshing feed chain 12 of the threshing device 3 to adjust the handling depth of the cereal meal are provided.

  As shown in FIGS. 1 to 4, the handling depth adjusting and conveying device 13 includes a handling depth conveying body 15 having a chain guide structure according to the present invention at a lower part between the cereal conveying body 10 and the threshing feed chain 12. In this method, the back is moved up and down, left and right, or in the direction of synthesis thereof, with the front serving as a fulcrum, so that the grain depth is clamped and conveyed so that the handling depth can be adjusted. In addition, the handling depth conveyance body 15 of the example of illustration shows the relay feed chain 16 interposed between the termination | terminus part of the tip side conveyance body 11 and the threshing feed chain 12, and relays from the termination | terminus of the handling depth conveyance body 15 to it. The feed chain 16 is configured to transfer the cereal stock side.

  Further, the handling depth carrier 15 has a handling depth chain 20 stretched between the front (upper conveyance side) drive sprocket 17 and the rear idler wheel 19, and the base of the drive shaft cylinder 21 provided with the drive sprocket 17 is disposed at the front side. A handling depth transmission shaft portion 22 provided on the processing portion transmission shaft cylinder 5 side is supported by a fulcrum so as to be freely rotatable. And the chain frame 23 extended from the drive shaft cylinder 21 side and pivotally supporting the idler wheel 19 is connected with the handling depth operation mechanism 25 installed in the said pre-processing part transmission shaft cylinder 5 side. This handling depth actuating mechanism 25 is actuated by detecting the saddle length of a handling depth sensor (sheath length detection sensor) 26 provided so as to face the tip side carrier 11 with a known configuration, and handles the handling depth carrier 15 in the depth direction. With the shaft portion 22 as a fulcrum, the rear part is rotated in the slimming direction of the transporting culm, and the shallow handling operation and the deep handling operation are performed.

  As a result, when the handling depth sensor 26 detects a short culm grain, it is relayed to the relay feed chain 16 with an appropriate handling depth by a depth handling operation that rotates the handling depth carrier 15 upward. Further, when the handling depth sensor 26 detects a long culm grain, it is transferred to the relay feed chain 16 with an appropriate handling depth by a shallow handling operation in which the handling depth carrier 15 is rotated downward. Therefore, the cereal mash that has been transferred to the relay feed chain 16 by the automatic handling depth control as described above is inherited by the threshing feed chain 12 and is always conveyed and supplied to the threshing device 3 at an appropriate handling depth.

Further, as shown in FIGS. 3 and 4, the handling depth transport body 15 that performs automatic handling depth control as described above is mounted with the idler wheel 19 movably in the chain tension direction on the chain frame 23 via the adjustment support rod 27. Chain end guides (scrapers) 30 and 31 are provided on the upper and lower surfaces of the adjustment support rod 27 for preventing the wrapping of the culm at the conveyance end portion and promoting the transfer to the relay feed chain 16. Yes.
An adjustment gap 32 is provided between the chain end guides 30 and 31 and the chain frame 23 to adjust the idler wheel 19 so as to be movable in the chain tension direction. The adjustment gap 32 is at least a round bar described later. An interval for installing the formed guide 33 for preventing chain detachment is provided. The handling depth chain 20 is a chain type in which both ends of the upper and lower chain plates 36 having the conveying projections 35 are alternately wrapped and connected to form an endless belt by a chain pin 37 in the same manner as other stock transport chains. It is said.

  The guide 33 is formed by bending a round bar having a diameter (about 5 to 10 mm) larger than the plate thickness (about 1 to 3 mm) of the chain end guide 30 into an L shape, and transporting the upper chain end guide 30 on the upper side. It is set as the structure installed in the edge part. That is, the guide 33 in the illustrated example includes a transport guide surface 33a along the transport direction inside the valley portion 36a formed between the transport protrusions 35 and 35 of the adjacent chain plate 36 of the handling depth chain 20, and the transport guide. The plate guide surface 33b is bent from the surface 33a with a smooth arc surface and faces the adjustment gap 32, and the conveyance guide surface 33a and the plate guide surface 33b have an arcuate guide surface 33c formed by a cross-sectional shape of a round bar. Forming.

  Accordingly, as shown in FIG. 4, the handling depth conveyance body 15 includes a guide 33 having a smooth guide surface 33 c formed of a round bar while the chain end guide 30 is formed of a thin plate material to reduce weight. It has a configuration. When the handling depth chain 20 that has been loosened as the handling depth carrier 15 moves to the shallow handling side is bent upward and greatly deviates from the center of the sprocket, the guide 33 moves the chain plate 36 to the guide surface 33c. To touch and guide downward. As a result, the guide 33 can guide the handling depth chain 20 shifted from the center of the sprocket to the sprocket center side and smoothly engage the idler wheel 19 to prevent the chain from coming off.

As shown in FIG. 5, when the chain end guide 30 is made of a thick plate material, the guide 33 can be formed by forming a smooth downward arcuate guide surface 33c at the end thereof. it can. In this case, the end portion of the chain plate 36 which is bent upward is guided by a large arc-shaped guide surface 33 c of a guide 33 formed integrally with the chain end guide 30 and smoothly engaged with the idler wheel 19. Can be made.
Also, it is desirable to install a guide 33 in the chain end guide 31 installed below the idler wheel 19. In this case, the chain is prevented from coming off when the handling depth transport body 15 moves to the depth handling side. The ring 19 can be smoothly engaged.

  Further, the handling depth transport body 15 sandwiches the clamping rail 40 along the conveyance surface of the handling depth chain 20 by a spring support mechanism 42 provided at the other end of a U-shaped rail support rod 41 provided on the back surface of the chain frame 23. It is biased in the direction to support the mounting. A starting rail 43 is provided on the starting end side of the holding rail 40 to smoothly transfer the cereal from the cereal carrier 10, and the end of the holding rail 40 is an end for auxiliary auxiliary clamping made of a spring wire. Rails 45 are provided.

  Further, as shown in FIGS. 2 and 6, the handling depth transport body 15 includes a chain tension mechanism 50 that biases the handling depth chain 20 in a chain. The chain tension mechanism 50 is provided with a spring cover 53 on a spring 52 that urges a tension ring 51 that is in rolling contact with the chain pin 37 from the inside of the handle depth chain 20 in the chain tension direction. That is, when the spring 52 is engaged with both ends of the coil spring by the tension arm 55 that swingably supports the tension ring 51 and the adjustment screw 56 that is supported by the chain frame 23 so as to be able to advance and retract, By attaching the spring 52 to the spring cover 53 made of a pipe material and attaching the spring 52 to the spring 52, the adhesion of the sawdust to the spring 52 is prevented. The upper portion of the chain tension mechanism 50 is covered with a cover plate 57 that is attached to and supported by the chain frame 23.

  The spring cover 53 is preferably formed by cutting the pipe length to the set tension length of the spring 52. In this case, the tension adjustment operation of the spring 52 is adjusted while measuring using a scale or the like. The complicated operation to be performed can be omitted, and the spring cover 53 can be quickly used as a reference. Further, if the inner diameter of the spring cover 53 is provided so as to be locked to the outer diameter of the spring 52, it is possible to easily prevent the spring cover 53 from being displaced and generating noise due to vibration or the like.

  The combine 1 provided with the handling depth adjusting and conveying device 13 configured as described above operates the handling depth conveying body 15 in the slimming direction of the cereal as described above, and performs automatic handling depth control of the conveyed cereal. It is possible to supply the threshing device 3 with an appropriate handling depth. And the handling depth conveyance body 15 of the handling depth adjustment conveyance device 13 is when the handling depth chain 20 is bent upward at the end of the plate-like chain end guide 30 covering the upper side of the idler wheel 19 on the conveyance upper side. Since the guide 33 that guides the chain plate 36 downward is provided, for example, the handling depth transport body 15 that has been extended in the handling depth chain 20 is operated to the shallow handling side, and the pulling load that pulls down the grain straws being transported downward Thus, when the handling depth chain 20 is largely bent upward, the tip of the chain plate 36 that is lifted and moves in the transport direction can be reliably brought into contact with the arc guide surface 33 c of the guide 33.

  As a result, the chain plate 36 is guided downward (sprocket center side) along the guide surface 33c of the guide 33, and the handling depth chain 20 is guided to the sprocket center side even when stretched and is smoothly wound around the idler wheel 19. It is possible to carry out deep handling of cereals. Therefore, it is possible to carry out conveyance while preventing problems such as deformation of the chain end guide 30 and the chain plate 36 and chain detachment due to the chain plate 36 being in contact with or riding on the chain end guide 30 violently.

Note that the chain end guide 31 having the same shape as the chain end guide 30 and having the guide 33 smoothly guides the handling depth conveying body 15 bent downward to the upper side (sprocket center side).
Further, the chain end guides 30 and 31 having the guide 33 can reduce the interval as much as possible without increasing the interval between them to prevent contact with the chain plate 36 of the bent handling depth chain 20. There is an advantage that the scraper action of the end guides 30 and 31 is ensured and the pulling of the cereal into the interval at the end rotation portion by the conveying projection 35 of the chain plate 36 can be prevented.

It is a side view which shows the structure of the principal part of the pre-processing part of a combine and the handling depth adjustment conveyance apparatus. It is a perspective view which shows the structure of the handling depth conveyance body of FIG. It is a top view which shows the structure of the termination | terminus part of the handling depth conveyance body of FIG. FIG. 4 is a right side view of FIG. 3. It is a front view which shows the handling depth chain and guide of the state by which the handling depth conveyance body of FIG. 3 was act | operated by the shallow handling state. It is a front view which shows the chain tension mechanism of a handling depth chain.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 1a Traveling machine body 2 Pre-processing part 3 Threshing apparatus 10 Grain basket conveyance body 12 Threshing feed chain 13 Handling depth adjustment conveyance apparatus 15 Handling depth conveyance body 17 Drive sprocket 19 Free wheel 20 Handling depth chain 23 Chain frame 27 Adjustment support rod 30 , 31 Chain end guide 33 Guide 33a Transport guide surface 33b Guide surface 33c Guide surface 36 Chain plate

Claims (2)

  The cereal is moved between the cereal carrier (10) and the threshing feed chain (12), which holds the harvested culm and transported backward, and moved in the slimming direction of the cereal that is transported backward with the front as a fulcrum. A handling depth transport body (15) for transporting the rod with adjustable handling depth is provided, and the handling depth transport body (15) is provided on the front drive sprocket (17) and the chain frame (23) extending rearward thereof. In the combined depth adjusting and conveying apparatus for a combine which is configured by extending a handle depth chain (20) to an idler wheel (19) supported so as to be adjustable in chain tension via an adjustment support rod (27), the handle depth conveyance described above. Plate-like chain end guides (30), (31) covering the upper or lower side of the idler wheel (19) are provided on the adjustment support rod (27) of the body (15), and the chain end guides (30), (31 ) A handling depth chain (20) that deviates from the center of the sprocket at the end of the upper transfer side Providing the guide (33) to induce the sprocket center side while those to 扱深 adjusting transport device Combine characterized by.   A guide (33) is formed by providing a round bar having a diameter larger than the plate thickness of the chain end guide (30) along the end of the plate-shaped chain end guide (30), (31) on the upper side of the conveyance. The combine handling depth adjusting and conveying apparatus according to claim 1.

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