JPH0626424U - Stock harvesting machine of reaper - Google Patents

Abstract

(57) [Summary] [Purpose] When suspending a stock carrier transport chain on a driven wheel placed in front of the drive sprocket on the cut-off side, the chain jump and chain due to a decrease in the chain suspension angle in the drive sprocket. Securely prevent disconnection. [Configuration] The drive angle θ ₁ of the drive sprocket 16 is made smaller than the chain suspension angle θ, and the clearance angle θ _{2 is set} to the chain suspension angle θ.
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Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stock-source carrier device for a harvester such as a combine harvester.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, in this type of combine harvester, it is proposed to widen the divider interval at the end of the already-cutted land where cutting residue occurs in order to prevent uncut cutting of stems as much as possible. However, in this case, since it is required that the sweeping width of the sweeping device be wide corresponding to the interval between the dividers, it is necessary to increase the diameter of the star wheel forming the sweeping device. However, there is a space limitation in increasing the diameter of the star wheel, and it is not possible to sufficiently widen the scraping width.For this reason, the stem culms are not properly scraped and are left uncut or scratched again. However, there was an inconvenience that the rooting could not be arranged properly and the accuracy of threshing processing was reduced. Therefore, the stock-source transport chain suspended on the drive sprocket with the same axis as the star wheel is further suspended on the driven wheel that is arranged in front of the drive sprocket on the side of the cut land, and the stock-source transport chain is scraped. It is conceivable to extend the transport range up to the tip rotation locus of the star wheel. In this case, however, the chain suspension angle (suspension range) of the drive sprocket becomes smaller, which may cause chain jumps or chain disconnections. The reality is that we couldn't do it because of the fear.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide a stock-source transport device for a reaper that can eliminate these drawbacks. Suspend the stock conveyor chain in the scraping path between the drive sprocket arranged on the same axis of the star wheel and the driven sprocket arranged on the transport lower side of the drive sprocket. In the reaper, the stock carrier chain is suspended by a driven wheel arranged in front of the drive sprocket on the side of the already-cutted land, and the scraped carrier range of the stock carrier chain is set at the tip turning locus of the star wheel. The drive angle of the meshing teeth formed on the outer periphery of the drive sprocket is set smaller than the chain suspension angle, while the clearance angle is set larger than the chain suspension angle. It is intended. According to the present invention, according to this configuration, the stock transfer chain is extended by the driven wheel disposed in front of the drive sprocket on the side of the cut land to extend the scraping transfer range. It is designed to prevent the chain from coming off.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a combine with 5 cuttings, the combine 1 having a pretreatment section 2 for cutting stems, a threshing section 3 for threshing the cut stems, and a discharge treatment for threshed culms. The post-processing section 4, the crawler type traveling section 5 and the like are provided, but these configurations are all conventional.

In the pretreatment section 2, a divider 6 is installed in parallel at a front end of the machine body at a predetermined interval in order to divide the stem culm into a number of cutting lines, and the stem culm introduced from between the dividers 6. The raising device 7, the cutting blade 8 for cutting the raised stem culm root, the scraping device 9 located above the cutting blade 8 for scraping the stalk, and the scraping device 9 for scraping A horizontal transfer device 10 for merging the mixed stalks on the left end side of the pretreatment unit 2, a stalk transfer device 11 for transferring the merged stalks to the threshing unit 3 while changing the vertical posture from a horizontal posture. Of the dividers 6, the intervals between the dividers 6, 6 for weeding the row at the end of the already-cutted land are set to be wider than the intervals of other dividers so as to prevent uncut residue as much as possible. Has been done.

Reference numerals 12 and 13 denote star wheels constituting the scraping device 9. Of the star wheels 12 and 13, the star wheel 12 disposed at the end on the side of the already cut ground has a scraping guide 14 While operating by itself to scrape one row of culms, the other star wheels 13 are paired to mesh with each other to scrape two rows of culms. However, the star wheel 12 at the end of the already-cutted ground is formed to have a larger diameter than the other star wheels 13 in order to secure the possible width for scraping as wide as possible.

Further, 15 is a stock-source transport chain (roller chain with protrusions) arranged in the stem-cule scraping route at the end on the side of the already-cutted ground, and the stock-source transport chain 15 is the stock chain transport chain 15 of the star wheel 12. It is suspended by a drive sprocket 16 disposed on the same axis and a driven sprocket 17 disposed on the transport lower side than the drive sprocket 12, that is, at the transport start end of the lateral transport device 10, and driven. In the state where the sprocket 16 is driven, the stem culm is scraped together with the star wheel 12, and the scraped culm is conveyed to the conveyance start end portion of the lateral conveyance device 10 while being sandwiched between the scraped guide 14 and In the present invention, the stock carrier transport chain 15 is further suspended around the driven wheels (tension sprocket) 18 arranged in the front direction of the drive sprocket 16 on the side of the already-cutted land, and the stock carrier transport chain 15 is suspended. The range in which the scraping conveyance of the conveyor 15 is extended to the outside of the tip rotation locus of the star wheel 12 and the scraping belt 27 (the belt member that scrapes above the stock conveyor chain 15). Reference numeral 19 is a swing arm that supports the driven wheel 18 so as to be movable back and forth, 20 is an ammunition that always urges the driven wheel 18 forward through the rocking arm 19, and 21 is an attachment of the ammunition 20. An adjuster 22 for adjusting the power is a guide plate 22 for guiding the stock carrier transport chain 15 at a lateral position of the drive sprocket 16 on the side of the cut ground.

By the way, the chain suspension angle θ of the drive sprocket 16 becomes small due to the suspension wheel 15 of the stock carrier being suspended on the driven wheel 18, but in the drive sprocket 16, the drive of the meshing teeth 16 a is performed. Angle θ₁The angle between the straight line connecting the pair of roller meshing positions and the drive surface 16b of the meshing teeth 16a is set smaller than the chain suspension angle θ, which prevents chain jumps and chain disconnections. It can be surely prevented. That is, since the drive surface 16b of the meshing tooth 16a that presses the roller portion 15a of the stock-source transport chain 15 is brought close to the vertical direction, the stock-source transport chain 15 can be reliably directed toward the driven sprocket 17 without being released in the outer diameter direction. It is designed to be driven by pressing. Further, in the drive sprocket 16, the clearance angle θ of the meshing tooth 16a is ₂ (An angle formed by a straight line perpendicular to the pair of roller meshing positions and the flank 16c of the meshing tooth 16a) is set larger than the chain suspension angle θ. Not only can the meshing be facilitated, but the disengagement can also be smoothed. That is, since the flank 16c facing the drive surface 16b is tilted as much as possible, the meshing teeth 16a smoothly fit between the rollers 15a at the time of meshing, and the roller 15b escapes at the time of meshing. The surfaces 16c are smoothly separated without interfering with the surface 16c.

On the other hand, 23 is a chain guide that is arranged so as to reach from the disengaged position of the drive sprocket 16 to the meshed position of the driven sprocket 17, and the chain guide 23 guides the inner peripheral portion of the stock carrier transport chain 15. Although it slides and guides, an attachment piece 23a formed integrally with the chain guide 23 is fixed to the frame 26 by a bolt 25 together with a fixing piece 24a of a scraper 24 described later.

The scraper 24 is formed in a home base shape having a sharp tip, and is disposed at a position where the drive sprocket 16 is engaged with the scraper 24. The sharp tip has a sharp tip. It is fitted in a groove portion 16d formed between the upper and lower meshing teeth 16a. That is, the tip end of the scraper 24 contacts the roller 15a of the stock conveyor chain 15 carried by the drive sprocket 16 beyond a predetermined meshing separation position, and the chain guide 23 along the contact surface 24b. However, in this embodiment, the angle formed between the contact surface 24b of the scraper 24 and the drive surface 16b of the drive sprocket 16 is set to 90 °, which is why The chain 15 can be smoothly guided up to the chain guide 23 by inclining the chain 15 as gently as possible.

In the embodiment of the present invention configured as described above, in the drive sprocket 16, the chain suspension angle θ becomes small due to suspension of the stock-source transport chain 15 by the driven wheels 18, but Since the driving angle θ ₁ of the meshing teeth 16a is set smaller than the chain suspension angle θ, the meshing stock carrier chain 15 that is meshed is surely pressed against the driven sprocket 17 without being released in the outer diameter direction. As a result, it is possible to extend the scraping and conveying range of the stock carrier transport chain 15 to the outside of the tip rotation locus of the star wheel 12, while ensuring that there are no problems such as chain jumps or chain disengagement. Whether it is possible to drive the chain, it is possible to reliably prevent inconveniences such as chain wear due to chain jumps and work interruptions due to chain disconnection.

Moreover, since the clearance angle θ ₂ of the meshing tooth 16a is set to be larger than the chain suspension angle θ, the meshing tooth 16a smoothly fits between the rollers 15a of the stock conveying chain 15 at the time of meshing. On the other hand, at the time of disengagement, the roller 15b is smoothly separated without interfering with the flank 16c, and therefore, extremely smooth chain driving can be performed, which can cause chain wear and chain noise. Can be prevented.

Further, in the embodiment, since the scraper 24 fitted between the upper and lower meshing teeth 16a of the drive sprocket 16 is arranged at the meshing separated position of the drive sprocket 16, the drive sprocket 16 is beyond the predetermined meshing separated position. It is possible to forcibly separate the stock-source transport chains 15 that are carried around to each other, so that the chain lock that accompanies carrying around can be reliably prevented.

Further, since the angle formed by the contact surface 24b of the scraper 24 and the drive surface 16b of the drive sprocket 16 is set to 90 °, the stock conveyor chain 15 can be smoothed by a gentle inclination. In addition, there is an advantage that the chain guide 23 can be guided.

Furthermore, since the chain guide 23 and the scraper 24 are separately formed, it is possible to replace only one member according to the wear condition, etc. Since it is fixed to the frame 26 by tightening 25 together, there are no inconveniences such as a positional relationship between both members being displaced, and the number of assembling steps being increased.

It should be noted that the present invention is not limited to the above-described embodiment, and the stock carrier transport chain 15 and chain guide 28 are provided as in the second embodiment shown in FIG. 10, for example. The sprocket 29 may be engaged with the non-acting side of the sprocket 29. In this case, a large chain suspension angle θ can be secured in the sprocket 29, so that chain jumping and chain disengagement can be prevented more reliably. You can Further, as in the second embodiment, when the stock-source transport chain 15 is engaged with the non-acting side of the sprocket 29, the stock-source transport chain 15 can be operated even when the sprocket 30 is used as a drive source. . That is, in this case, since the stock carrier transport chain 15 is pressed against the non-acting side of the sprocket 29 by the chain guide 28, the sprocket 29 is also driven based on the drive of the sprocket 30, and therefore the sprocket 29 is driven by the drive sprocket. The same effect as that of the first embodiment can be obtained by acting as described in 16.

[0017]

[Operation effect]

 In short, since the present invention is constructed as described above, the stock-source transport chain is suspended by the driven wheels arranged in front of the drive sprocket on the side of the cut land, and the stock-source transport chain is scratched. Although the feeding range is extended to the tip rotation locus of the star wheel, the drive angle of the meshing teeth formed on the outer periphery of the drive sprocket is set smaller than the chain suspension angle. Even if the chain suspension angle θ of the drive sprocket is small, it is possible to reliably push and drive the driven sprocket toward the driven sprocket without letting the stock-source transport chain escape in the outer diameter direction. Therefore, in addition to enabling reliable chain drive without chain jumping or chain disengagement, the stock carrier transport chain is abnormally worn due to chain jumping, or work is interrupted due to chain disconnection. Inconvenience can be surely prevented.

Moreover, since the clearance angle of the meshing teeth is set to be larger than the chain suspension angle, it may be possible to make the meshing with the chain transporting chain extremely smooth, or even when the meshing disengages. The chains can be smoothly separated without interfering with the meshing teeth, and it is possible to prevent chain wear and chain noise from occurring as much as possible.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a combine.

FIG. 2 is a schematic plan view of a pretreatment unit.

FIG. 3 is a plan view of the scraping device.

FIG. 4 is a plan view of an essential part of the same showing a tooth profile of a drive sprocket.

FIG. 5 is a plan view of relevant parts showing the action of the scraper.

FIG. 6 is a sectional view of the same as the above.

FIG. 7 is a sectional view of the same as the above.

FIG. 8 is a rear view of the main parts of the same showing the attachment state of the scraper and the chain guide.

FIG. 9 is an exploded perspective view of a scraper and a chain guide.

FIG. 10 is a schematic plan view of a raking device showing a second embodiment.

[Explanation of symbols]

1 combine 2 pretreatment unit 9 scraping device 13 star wheel 15 stock carrier chain 16 drive sprocket 16a meshing teeth 16b drive surface 16c flank 17 driven sprocket 18 driven wheel θ chain suspension angle θ ₁ drive angle θ ₂ clearance angle

Claims (1)

[Scope of utility model registration request] 1. A stock yuan transport chain, which is disposed in a stalk-scraping path at an end of a cut site, is transported by a drive sprocket disposed on the same axis of a star wheel and more than the drive sprocket. In a reaper suspended from a driven sprocket disposed on the lower side, the stock-source transport chain is further suspended from a driven wheel disposed on the front side of the already-cutted land of the drive sprocket, and the stock-source transport chain is suspended. The drive range of the meshing teeth formed on the outer periphery of the drive sprocket is set smaller than the chain suspension angle, and the clearance angle is set to A stock-source transfer device for a reaper that is set to be larger than the suspension angle.