JPH0335078Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing stems, leaves, etc. from being wrapped around a sprocket shaft in a stem culm conveying device used in a combine harvester or the like.

In the above-mentioned conveyance device, the configuration of the transmission mechanism can be extremely simplified if the outer peripheral surface side of the chain, that is, the side with the conveyance protrusion, is engaged with the sprocket. Even if it is installed on the non-conveyance path side of the stem culm, some leaves, etc. may get caught on the conveyance protrusion of the chain and be brought into the meshing part, and wrap around the sprocket shaft, increasing transmission resistance or damaging the transmission part. Due to the defects, the transmission path and direction of rotation are restricted, and it is necessary to provide special equipment for the conveyor, transmission mechanism, etc., and it has been difficult to employ the above-mentioned system in the past.

The present invention was devised in view of these circumstances.In particular, the drive shaft of the sprocket is internally supported by a fixed support cylinder, and a convex portion is provided on the non-meshing side of the stem culm conveyance chain at the upper end of the support cylinder. The convex portion is fitted into a circumferential groove recess formed on the side surface of the drive sprocket facing the support tube, thereby reliably preventing stems, leaves, etc. brought in by the conveying protrusion from getting caught in the sprocket shaft. This makes it possible to employ a stem culm conveying device in which the outer peripheral surface of the chain is engaged with the sprocket.

Hereinafter, the structure of the present invention will be explained based on the drawings. In the figure, 1 is a chassis of a combine harvester supported by a crawler 2 for running and a reaper frame 3 mounted on the front. A threshing machine 4 is mounted on the front side, a driver's seat is installed on the other side, and an engine is mounted below the driver's seat. The reaper frame 3 has operating parts such as a combing case 5, a conveyance device, and a cutting blade 6, and these operating parts are connected by an appropriate transmission mechanism from a gear case 7 provided at the rear upper part of the reaper frame 3. The power of the engine is transmitted to each operating section through the gear case 7. Cylindrical portions 7a protruding from the left and right sides of the gear case 7
is rotatably supported at the tip of a column 8 erected at the front of the chassis 1, and the reaper frame is moved forward and backward by a hydraulic cylinder 9 provided between the chassis 1 and the reaper frame 3. The entire body 3 is configured to be vertically movable around the cylindrical portion 7a. Reference numeral 10 denotes a transmission transmission case, which is connected to the gear case 7 by an outer cylinder 10a housing a transmission shaft therein, and includes a sprocket provided on a transmission shaft 11 that projects upward from the side of the transmission transmission case 10, and a transmission transmission case. A stock conveyor chain 13 is stretched between a sprocket provided on a star wheel shaft 12 and a sprocket provided upright in front of the star wheel shaft 10. A star wheel 14 is provided at the lower part of the star wheel shaft 12, and a scraping conveyance belt 15 is provided at the upper part, and these are adapted to rotate in the direction of arrow A in FIG. Star wheels 14a, 14b, 14
c and the scraping conveyor belts 15a, 15b, 15c engage with the star wheel 14 and rotate in conjunction with each other, thereby conveying the stem culms partitioned by the dividers 16 backward. Reference numeral 17 denotes a drive shaft that projects upward from approximately the center in the width direction of the conveyance transmission case 10, and is connected to the support tube 1 of the transmission case 10.
It protrudes upward from 0b, and a drive sprocket 18 is pivotally attached to this upwardly protruding portion. Reference numeral 19 denotes a horizontal conveying chain which is meshed and suspended from the drive sprocket 18 and driven in the direction of arrow B by rotation of the drive sprocket 18 in the direction B';
Rolling wheels 20, 2 are rotatably supported on the sprocket 18 and fixed shafts provided on the reaper frame 3, respectively.
1 and 22 and a tension wheel 23 which is rotatably provided around the drive shaft 17. This horizontal conveyance chain 19 is engaged with the drive sprocket 18 so that the conveyance protrusion 19a faces in the axial direction of the drive shaft 17, and the rolling wheels 20,
21, 22 and the tension wheel 23 support the conveying protrusion 19a so as to face outward. and,
The star wheel 14, 14a, 14b, 14
c and scraping conveyance belts 15, 15a, 15b, 15c
The stem culm sent rearward is sent laterally between the wheels 20 and 21 of the horizontal conveyance chain 19, and
Between 2 and 2, the rollers are moved diagonally backward, and the rollers 22, drive sprockets 18, and tension rollers 2
3 and the rollers 20 are on the non-conveyance side. A convex portion 10c is provided to protrude upward on one side of the upper end of the support tube 10b, that is, on the side where the drive sprocket 18 and the lateral conveyance chain 19 do not mesh.
is fitted into a circumferential groove recess 18a formed on the side surface of the drive sprocket 18 facing the support tube 10b. The portion 10c prevents the winding from winding around the shaft 17. As described above, this convex portion 10c protrudes only on the non-meshing side of the support tube 10b, and conversely, a notch recess 10d is formed on the meshing side, and the tip of the conveyance projection 19a is brought closer to the drive shaft 17 by that much. Therefore, the diameter of the drive sprocket 18 can be made small. Reference numeral 23a denotes an arm whose base is fitted onto the support tube 10b and whose tip supports the tensioning wheel 23, and is biased so that the tensioning wheel 23 is stretched outward. Reference numeral 24 indicates a stock lifting chain, and 25 indicates an ear lifting chain.These chains 24 and 25 take over and lift the stem culm transferred by the horizontal conveyance chain 19, and supply it to the threshing machine 4. It is a thing,
Depending on the length of the stem culm, the angle of inclination can be changed as shown by the chain line in Figure 1.

Next, the structure of the crawler device shown in FIG. 1 of the embodiment drawing will be explained in detail with reference to FIGS. 6 and 7. It is suspended between idler wheels 27. Reference numerals 28 and 29 denote a plurality of wheels that support the crawler 2, and the core protrusions 2a protruding inside the crawler 2 are sandwiched between the left and right wheels 28 so as to guide the crawler 2. It's summery.
Conventionally, the wheel width of each wheel (the gap between the left and right wheels that sandwich the core protrusion 2a) is set to a constant size, but when the aircraft turns, the drive wheel 26
Or, the rolling wheel 28 adjacent to the idler wheel 27 has the core protrusion 2
There were defects such as abrasion due to sliding contact with the metal core protrusion 2a, and failure of the crawler to come off by riding over the core protrusion 2a.

The one shown in FIG. 6 has been improved to prevent such defects, and the wheel widths of the wheels 28, 28 adjacent to the driving wheel 26 and the idler wheel 27 are set to the middle wheel 2.
It is larger than the wheel width of wheels 9 and 29, that is, the wheel width of wheels 28,
28 and the core bar protrusions 2a, 2a in the width direction to actively provide room for left and right movement of the portion of the crawler 2 that is close to the drive wheel 26 and the idler wheel 27, thereby preventing sliding contact or climbing over. The drive wheel 26 shown in FIG.
The distance between the wheels 28 and 28 adjacent to the idler wheel 27 is made smaller than the distance between the intermediate wheels 29 and 29, that is, the gap between the metal core protrusions 2a and 2a is made smaller, and the surface of the wheel 28 is made smaller. By making the hardness higher than the hardness of the intermediate rollers 29, the amount of left and right movement of the crawler 2 in this part is actively limited, so that even if the core protrusions come into sliding contact, the amount of wear is minimal. As a result, the load placed on the intermediate rollers 29 is reduced, and the crawler device is made of a thin and lightweight material, so that the overall weight of the crawler device can be reduced.

Next, the operation and effects of the device of the present invention will be explained. The stem culms separated by the dividers 16 are subjected to the combing action of the combing case 5, are guided to be raked by the sprocket 14 and the raking conveyor belt 15, are cut by the cutting blade 6, and are cut by the cutting blade 6. Original vertical feed chain 1
3, and when it reaches the horizontal conveyance chain 19, it is transferred laterally between the wheels 20 and 21 in the direction of arrow B, and further transferred diagonally rearward between the wheels 21 and 22. The end portion transferred diagonally rearward is held by the stock head lifting chain 24 and lifted up, and the tip portion is taken over by the tip lifting chain 25 and lifted up. The stem culms opened at the ends of both chains 24, 25 are immediately transferred to the feed chain 4a of the threshing machine 4, where they are threshed while being transferred to the rear.

In the above-mentioned work process, even if a part of the stem culm etc. is caught on the transport protrusion 19a on the non-transport path side of the horizontal transport chain 19 and is transported and brought into the meshing part with the drive sprocket 18, the drive sprocket 18
The convex portion 10 of the support tube 10b is located in the circumferential groove concave portion 18a.
c is fitted, which actively prevents the above-mentioned leaves, etc. from wrapping around the drive shaft 17, and even if something were to adhere to the shaft, it would not adhere to the entire circumference of the shaft. Therefore, there will be no increase in driving resistance or damage to the transmission part.

In this way, the present invention is configured so that the outer circumferential surface side of the protrusion-equipped stem culm conveyance chain on the non-conveyance path side having the chain conveyance protrusion is engaged with the drive sprocket 18 which is pivotally attached to the drive shaft 17 to be rotationally driven. In this stem culm conveying device, the drive shaft 17 is internally supported by a fixed support tube 10b, and the support tube 10b
A convex portion 10c is provided protrudingly on the non-meshing side of the upper end of the stem culm conveying chain, and the convex portion 10c is fitted into a circumferential groove recess 18 formed on the side surface of the drive sprocket 18 facing the support tube 10b. Since the culm is prevented from being caught in the drive shaft 17, the culm conveying device has the outer peripheral surface of the chain engaged with the drive sprocket 18 on the non-transfer path side of the culm conveying chain with protrusions. This method can reliably prevent and actively eliminate the entanglement of stem culms, etc. into the drive shaft 17 by the conveying protrusion, which is a major defect of the conventional method, and thereby improve the transmission path and rotation direction. The transmission mechanism can be extremely simplified without any restrictions, and the concave portion 18a of the drive sprocket 18 and the convex portion 10c of the support tube 10b require only partial modification of the sprocket and support tube originally required for the configuration, and are not required separately. No winding prevention member or the like is required.

Further, the convex portion 10c of the support tube 10b is
Since it protrudes only on the non-meshing side of b, the tip of the conveying protrusion 19a can be brought closer to the drive shaft 17, and the diameter of the drive sprocket 18 can be made small. It has an effect.

[Brief explanation of the drawing]

Fig. 1 is a front side view of a combine equipped with the device of the present invention, Fig. 2 is a plan view of the same as above, Fig. 3 is a plan view of the horizontal conveyance chain, and Fig. 4 is a sectional view showing the main parts of Fig. 3. , FIG. 4 is an operational partial view of the same, and FIG. 5 is an exploded perspective view of the main parts. FIGS. 6 and 7 are explanatory plan views showing the relationship between the core metal and the rolling wheels of the crawler. 10...transportation transmission case, 10b...support tube, 1
0c... Convex portion, 17... Drive shaft, 18... Drive sprocket, 18a... Circumferential groove recess, 19... Horizontal conveyance chain.

Claims (1)

[Scope of utility model registration request] In a stem culm conveying device in which the outer circumferential surface side of a protruding stem culm conveying chain having a conveying protrusion on the non-conveying path side of the chain is engaged with a drive sprocket 18 pivotally attached to a drive shaft 17 for rotational driving. , the drive shaft 17 is internally supported by a fixed support tube 10b, and a convex portion 10c is provided protrudingly on the non-meshing side of the stem culm conveying chain at the upper end of the support tube 10b.
0c is fitted into a circumferential groove recess 18a formed on the side surface of the drive sprocket 18 facing the support tube 10b to prevent the culm from being caught in the drive shaft 17. Anti-wrapping device in conveyor equipment.