JP2019033712A - Transportation conveyor device in combine harvester - Google Patents

Abstract

To provide a transportation conveyor device in a combine harvester, facilitating replacing an abundant yield transportation specification sprocket having a higher number of teeth than a standard transportation specification sprocket.SOLUTION: A transportation conveyor device in a combine harvester is such that: the lower parts of a front side wall 13c and a rear side wall 13b of a transportation body case 13 to a machine body are connected by a case frame wall 28 which pivotally supports one end of a spiral shaft 26 having a drive sprocket 23; a lower wall 40 of at least one of upper and lower case frame walls 28, or a lower lid 38 of a lower end of the transportation body case 13 is openably/closably provided; and the plurality of drive sprockets 23 having different number of teeth and configured of a first semi-sprocket 23a and a second semi-sprocket 23b alternatively two-divided around a shaft hole and making a pair are mounted in a freely replaceable manner on a sprocket seat 26a provided in the spiral shaft 26.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a transporting conveyor device in a combine that can change the transporting speed of a conveyor that transports grains and the like.

Conventionally, a general-purpose combine that has a conveyor having a bucket inside a lifting body case of a first conveyor device (lifting conveyor device) installed in a threshing device, and lifts the first thing and discharges it to a glen tank. The inspection window (lower opening) is opened and closed by a cover plate (lower opening lid) via a plurality of bolts on the lower side of the lifting main body case, which has a rectangular cross section in a plan view, standing on the rear side of the Glen tank. It has a cover structure that can be freely adjusted, and a cover structure that covers the drive sprocket on the lower side of the conveyor and the transmission side such as the first spiral with the lower case. In addition, since the cover structure is comprised in the lower left part of the lifting main body case, the case left wall becomes the front wall on the maintenance work front side of this combine. (For example, Patent Document 1)
On the other hand, between the threshing device mounted on the left and right of the traveling machine and the Glen tank, the first conveyor device (lifting conveyor device) consisting of a lifting main body case having a rectangular cross section in a plan view is connected to the right side of the threshing device. In addition to standing up along the machine wall, the Glen tank is moved to the right from the work position and installed to be switched to a maintenance work position that opens the right machine wall side of the threshing device. There is already known a combine in which a lid structure formed on the right side wall of the case of the lifting main body case is opened during the maintenance work posture to perform maintenance work in the lifting main body case. (For example, Patent Document 2)
In the above-mentioned lifting conveyor device, normal maintenance work such as daily visual inspection, lubrication and dust removal performed daily from the opening part where the desired part is opened through the lid structure and case structure of the lifting body case, High-accuracy cleaning to prevent contamination during switching operations of different varieties, complete removal and cleaning of clogged materials in the lifting body case, and disassembly and assembly for replacing sprockets and spiral bodies on the transmission side Special maintenance work is performed.

JP 2001-8542 A JP 7-298775 A

The general-purpose combine shown in Patent Document 1 and Patent Document 2 described above is a variety of cereal crops such as rice wheat and soybeans (hereinafter simply referred to as standard yield crops) that are cultivated exclusively for human consumption without losing quality. Based on the standard yield that can be harvested by harvesting and threshing, it is designed as a standard yield harvest processing combine.
For this reason, for example, in the case of harvesting cereal crops of high-yield varieties cultivated with emphasis on high-yield for livestock feed (hereinafter simply referred to as multi-yield crops), When threshing, a large amount of grain is generated as the first thing, and there is a problem that the conveyor capacity due to this is insufficient due to insufficient transport capacity depending on the first conveyor device of the standard design.
Therefore, when harvesting and threshing high-yielding crops using the standard yield processing combine harvester, in order to increase the conveyor chain of the lifting conveyor device to the optimal lifting speed, the standard lifting specification sprocket (standard sprocket) is used. Special maintenance work such as changing the sprocket or replacing the spiral body with the speed increasing sprocket, which is replaced by a sprocket (speed increasing sprocket) with a high yielding specification with a large number of teeth, is performed.
That is, the combine transporting conveyor device disclosed in Patent Document 1 can perform normal maintenance work within the reach of the bucket inspection window provided on the lower side of the middle part of the lifting main body case. Since the upper part from the inspection window is completely closed, there is a disadvantage that the special maintenance work cannot be sufficiently performed. Further, when exchanging the drive sprocket or performing maintenance work on the transmission section, there is a problem that a complicated removal work for the entire lower case covering the transmission section side from below is required.
The combine conveying conveyor device shown in Patent Document 2 has the bucket main body case erected on the upper and lower intermediate case portion, the lower case portion, the upper case portion, and the threshing device side of the U-shaped section in plan view. Because it is a lid structure that connects bolts to the side wall, when removing and attaching the intermediate case part, there are many bolts connecting many flanges (attachment side parts), and the intermediate case part is large and heavy in weight structure Therefore, it is not suitable as a cover structure for normal maintenance work that requires frequent lid attachment / detachment operations, and the side wall when the intermediate case part is removed becomes a weak case frame, and the weight and vibration of the upper case part If a highly rigid structure is applied to the inertial load, there are disadvantages such as complicated parts and case structures and high manufacturing costs.
Therefore, the transporting conveyor device having the above-described configuration facilitates special maintenance work such as replacement of the sprockets of the above specifications without requiring complicated work such as replacement of the spiral body such as the first spiral, removal / insertion movement, and case disassembly. It becomes a problem to do.

In order to solve the above problems, the present invention firstly feeds the first item from the first spiral 22 via the conveyor 25 along the machine wall 6b of the threshing device 6 in which the Glen tank 5 is arranged side by side. The first conveyor device 10 or the second conveyor device 11 that lifts the second product from the second spiral 22a via the conveyor 25 is erected, and the main body case 13 of the second conveyor device. A conveyor chain 25a is wound around a drive sprocket 23 and a driven sprocket 23a that are pivotally supported inside, and the drive sprocket 23 is rotationally driven via the helical shaft 26 of the first or second helical body 22, 22a. In the feed conveyor device,
The lower part of the front side wall 13c and the rear side wall 13b of the main body case 13 with respect to the airframe is connected by a case frame wall 28 that pivotally supports one end of a helical shaft 26 having a drive sprocket 23. A lower cover 38 of at least one of the lower wall 40 or the lower end of the lifting main body case 13 is provided so as to be openable and closable, and a sprocket seat 26a provided on the helical shaft 26 is divided into two at the center of the shaft hole to form a pair. A plurality of drive sprockets 23 having different number of teeth constituted by the first half sprocket 23a and the second half sprocket 23b are alternatively attached to be freely replaceable.
Secondly, the drive sprocket 23 is divided into a shaft hole parting line L that makes the shaft hole 52 part a true half from the central part of the arbitrary tooth root part 51, and the arbitrary tooth root part from the end of the shaft hole parting line L. The teeth of the first half sprocket 23a and the second half sprocket 23b are divided into two by a tooth valley dividing line R that connects the central portion of the tooth root portion 51 adjacent to the protruding tooth 50 facing the 51 in the diameter direction. It is characterized by being configured with different numbers.

According to the first aspect of the present invention, in the transporting conveyor apparatus in the combine, the lower part of the front and rear side walls of the main body case with respect to the machine body is supported by one end of the helical shaft having the drive sprocket. It is connected by a frame wall, and at least one lower wall above and below the case frame wall or a lower lid at the lower end of the lifting main body case can be opened and closed, and the sprocket seat provided on the spiral shaft is divided into two at the center of the shaft hole A plurality of drive sprockets having different numbers of teeth formed by the first half sprocket and the second half sprocket that are formed and paired can be selectively attached to each other,
Without removing the spiral body from the lifting body case, replace the high yielding sprocket with a larger number of teeth than the standard lifting specification sprocket. Without impairing the case rigidity, the case frame wall can be easily attached to the upper or lower side of the case frame wall with a simple and inexpensive structure.
In addition, it is possible to manufacture an odd number of sprockets by the asymmetric first half sprocket and the second half sprocket without impairing the sprocket strength, and to easily select a desired lifting speed. Yield combine work can be made smooth.
According to the invention which concerns on Claim 2, the said sprocket is a shaft hole parting line which makes a shaft hole part a true half from the center part of arbitrary tooth root parts, and the said arbitrary tooth root part from the edge part of this shaft hole parting line. The first half sprocket and the second half sprocket have different numbers of teeth by dividing into two by a root split line connecting the central portion of the tooth root adjacent to the projecting teeth facing in the diametrical direction. By doing
The first half sprocket and the second half sprocket are separated from the projection teeth located on the extension of the shaft hole dividing line, and the central portion of the adjacent tooth root is divided in the diametrical direction. Makes sprocket split production easy without sacrificing tooth strength.
And, since the split surfaces of the first half sprocket and the second half sprocket are attached in a fitted state in which the shaft hole parting lines and the tooth part parting lines are in contact with each other, it is easy to reversely join the two at the time of assembly. In addition to being able to prevent this, the relative displacement movement in the diametrical direction of both of them can be restricted, and the mounting operation can be performed efficiently.

It is a whole top view which shows the general purpose type | mold combine provided with the conveyance main body case to which this invention is applied. It is a principal part right view which shows the structure which removed the grain tank of the combine of FIG. It is a principal part left view which shows the internal structure of a threshing apparatus. It is a principal part right view which shows the state which removed each cover etc. from the conveyance main body case of the state shown in FIG. It is a perspective view which shows the structure of the inside of the first conveyor apparatus, and the first spiral. It is a perspective view which shows the principal part of the spiral shaft of FIG. 5, and a sprocket. It is a principal part right view which shows the structure of the conveyance main body case of a 2nd conveyor apparatus. The structure of the lifting main body case of FIG. 7 is shown, (a) is the sectional view on the aa line of FIG. 7, (b) is the sectional view on the bb line of FIG. It is a left view which shows the attachment state of a sprocket. It is principal part sectional drawing which shows the attachment state of FIG.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall plan view of a general-purpose combiner equipped with a threshing apparatus to which the present invention is applied, and FIG. 2 is a right side view of a main part showing a structural part of the threshing apparatus with the grain tank of FIG. 1 removed. This combine A is supported by a traveling machine body 2 supported by a pair of left and right crawler type traveling devices 1 as a traveling unit so as to be able to move up and down a harvesting unit 3 that performs a harvesting operation of planted cereals at the front, A threshing unit that performs a maneuvering operation on the rear right side of the harvesting unit 3 and a grain tank 5 disposed on the rear side of the steering unit 4 and that performs threshing of the cereals harvested by the harvesting unit 3 on the left side of both. The apparatus 6 and the waste disposal part 7 which processes and discharges waste waste etc. from the rear end side of the threshing apparatus 6 are disposed.

  The mowing unit 3 conveys the harvested cereals backward by a feeder 8 that is built in a conveyor and feeds them into the cereal supply port 6 a of the threshing device 6. In the process of threshing the harvested cereal meal, the threshing device 6 conveys and supplies the first item into the Glen tank 5 via the first conveyor device 10 and also supplies the second item via the second conveyor device 11. The threshing process is reduced and reduced, and the threshed cereals are discharged to the ground surface behind the fuselage through the shredding process of the evacuation processing unit 7.

  The first conveyor device 10 and the second conveyor device 11 are a threshing device 6 and a Glen tank as a lifting conveyor device that is erected and supported in parallel in the front-rear direction on the right machine wall 6 b side of the threshing device 6. In the space space formed between the threshing device 6 and the right machine wall 6b, the threshing device 6 is installed upright. The first conveyor device 10 and the second conveyor device 11 have a plan view shape of each of the lifting main body cases 13 and 13 having a rectangular cross section that is long in the front-rear direction, and the right side wall (case front wall) of the case 13g. The lid structure makes it easy to perform maintenance work such as inspection and cleaning in the transport main body cases 13 and 13.

  As shown in FIGS. 1 and 2, the Glen tank 5 is provided with a grain discharge auger 12 comprising a vertical auger cylinder 12a, a relay cylinder 12b, a discharge auger cylinder 12c whose discharge posture can be changed, and the like. Then, the stored grain is discharged and supplied to the transport vehicle waiting in the field. The Glen tank 5 is fixed to the combine work posture shown in FIG. 1 and the support posture switching mechanism by a support posture switching mechanism having a known configuration with the vertical auger tube 12a erected on the traveling machine body 2 as a fulcrum. Is turned to the right in the direction of the arrow, and can be switched to a maintenance work posture in which a work space is widely opened to the right of the threshing device 6 behind the control unit 4.

As a result, the combine A is opened when the normal maintenance work is performed at the start, end of work, or in the middle of the work, while the Glen tank 5 is rotated to the right with the vertical auger cylinder 12a as a fulcrum to the maintenance work posture. Maintenance work such as inspection, repair, and cleaning of the first conveyor device 10 and the second conveyor device 11 and various transmission mechanisms disposed on the right side of the threshing device 6 can be performed through the work space that is provided. .
Combine A also uses the case right side wall 13g, which is the front side of the maintenance work, as the case front wall for the first conveyor device 10 and the second conveyor device 11 with the highest maintenance work frequency such as internal inspection and cleaning. The lid structure does not impair the case rigidity of the main body case 13.

Next, the threshing device 6, the first conveyor device 10, and the second conveyor device 11 will be described with reference to FIGS. First, as shown in FIG. 3, the threshing device 6 has a threshing unit 15 that performs a threshing operation of the harvested cereal mash supplied from the cereal supply port 6 a, and the threshing threshed by the threshing unit 15 And a sorting unit 16 that sorts into a second product, which is a processed product in which the grain and waste are mixed, and a dusty waste such as sawdust that has been subjected to a sorting process.
The threshing portion 15 is formed in a circular arc shape along a lower side of the handling cylinder 17 and a cylindrical handling cylinder 17 that is rotatably provided around a handling cylinder rotating shaft 17 a in the front-rear direction in the handling chamber 15 a. A receiving network 18 and the like are provided.

  As a result, the threshing unit 15 threshs by the plate-shaped handle teeth 17b in which the handling cylinder 17 that rotates the cereals in the handling chamber 15a is spirally erected, and the threshing processing is carried out by the receiving net 18 and threshing is performed. That is, the whole of the harvested cereal grains harvested by the harvesting unit 3 is put into the handling chamber 15a and threshing is performed, and the threshed threshing passes through the receiving net 18 and falls to the sorting unit 16 on the lower side. . Note that the handling chamber 15a and the sorting unit 16 are partitioned by a receiving net 18, and the harvested cereal mash introduced into the front side of the handling chamber 15a is threshed by the plate-shaped handling teeth 17b while receiving the net 18 It is transferred to the rear side of the.

  The sorting unit 16 is a swing sorting body 20 that swings and sorts the cereal grains that have passed through the receiving net 18, a tang fan 21 that blows the sorting wind, and a second unit that discharges dust after sorting to the outside of the machine. A sorting fan 21a, a first spiral 22 as a spiral body for collecting and transporting the sorted first object, and a second spiral 22a as a spiral body for collecting and transporting the sorted second thing are provided. . As a result, the threshing that has fallen from the receiving net 18 is dropped onto the chaff sheave of the swinging sorter 20 and further leaked downward while being sorted by the chaff sheave. The threshing that has leaked from the rocking sorter 20 is sorted into the grain that is the best by the sorting wind by the Kara fan 21, and the second and dust are removed by the sorting wind by the second sorting fan 21a. Can be sorted into products.

The first spiral 22 is laid horizontally in the left and right direction behind the tang fan 21 and transports the sorted first item to the right side of the threshing device 6, while the second spiral 22a is left and right behind the second selection fan 21a. It is installed in the direction and conveys the selected second product to the right side of the threshing device 6.
Further, on the right side of the threshing device 6, the first conveyor device 10 that conveys the first item conveyed by the first spiral 22 to the glen tank 5 and the second item conveyed by the second helix 22a are handled in the handling chamber 15a. Or the 2nd conveyor apparatus 11 which carries out reduction | restoration conveyance to the selection part 16 is provided.

  The first conveyor device 10 as a lifting conveyor device has a first lifting case body 10a erected upward from the terminal side of the first spiral 22 and a front side on the upper end side of the first lifting case body 10a. It consists of the grain conveyance spiral part 10b arrange | positioned at the side. In the main body case 13, a conveyor chain 25 a wound around a sprocket (driving sprocket) 23 as a driving wheel and a sprocket (driven sprocket) 23 a as a driven wheel that is pivotally supported at the lower and upper portions, A conveyor 25 configured by providing a plurality of bucket-shaped lifting pieces 25b for picking up the first thing and transporting it upward is provided. Thereby, the first thing conveyed to the terminal end side of the first spiral 22 is scooped up by the conveyor 25 on the lower end side of the first lifting case body 10a, and forward from the upper end side of the first lifting case body 10a. It is discharged to the side of the grain conveying spiral part 10 b on the side and supplied to the glen tank 5.

  In the first spiral 22 of the embodiment, a disc-shaped sprocket seat 26a for mounting the drive sprocket (hereinafter simply referred to as a sprocket) 23 is provided in the middle of the right end side of the helical shaft 26, and a shaft support portion 26b is provided on the shaft end side. And a screw portion 26c. In the state where the rightmost end of the helical shaft 26 is pivotally supported by a bearing metal 28a provided in a detachable manner on the case frame wall 28, the first spiral 22 hangs and supports the screw portion 26c with a nut to prevent it from coming off. The left end side is rotationally driven through a transmission mechanism in a state in which the left end side is supported by a left side wall-side shaft support (not shown) of the threshing device 6.

The first spiral 22 having the above-described configuration is provided with a standard or multi-yield lifting specification sprocket 23 that is separately prepared in a state where the nut support via the bearing metal 28a and the shaft support of the left machine wall side shaft support are released if necessary. And the first spiral 22 having a helical pitch can be easily replaced and attached.
The first spiral 22 has a sprocket mounting structure (to be described later) and a standard-lifting sprocket 23 (not shown) and a multi-yield lifting sprocket 23 shown in FIGS. Replacing is facilitated by an attachment structure that can be selectively attached and detached via four bolts 27 on the side surface.

As shown in FIGS. 3, 4, 7, and 8, the second conveyor device 11 includes a second lifting case body 11 a that lifts the second article conveyed by the second spiral 22 a upward, It consists of a forward reduction conveying spiral part 11b that conveys the second thing forward from the second lifting case body 11a and returns it to the handling chamber 15a or the sorting part 16.
The second article is transported upward in a conveyor main body case 13 of the second lifting case body 11a to a conveyor chain 25a wound around a driving sprocket 23 and a driven sprocket 23a that are pivotally supported at the lower part and the upper part. A conveyor 25 configured by providing a plate-shaped lifting piece 24 is provided. As a result, the second object conveyed to the terminal side of the second spiral 22a is scooped up by the conveyor 25 on the lower end side of the second lifting case body 11a, and forward from the upper end side of the second lifting case body 11a. It is discharged to the side of the forward reduction conveying spiral part 11b on the side and supplied to the threshing device 6 in a reduced manner.

  The forward reduction conveying spiral portion 11b is arranged on the inner side (left side) in the left-right direction with respect to the first conveyor device 10 (first lifting case body 10a), and extends to the front side of the first conveyor device 10 for lifting. The second product taken over is transferred forward and discharged to the handling chamber 15a or the sorting unit 16. That is, the forward reduction conveying spiral portion 11b includes a reducing spiral 30 that conveys the succeeding second thing forward, a conveyance case 31 in the front-rear direction that covers the periphery of the reducing helical 30, and the second lifting case body. An input case 32 that forms a discharge path 32a that guides the discharge of the second product that has been transported upward by 11a toward the transport case 31, and a handling chamber transport path or a sorting chamber that returns the transport path of the second product to the handling chamber 15a. And a path switching mechanism 33 for switching to any one of the sorting unit reduction paths to be reduced to 16.

  And the forward reduction conveyance spiral part 11b is connected with the upper part of the lifting main body case 13 through the input case 32, and the left side of the conveyance case 31 is connected to the right machine wall 6a of the threshing device 6. The charging case 32 extends from the upper part of the lifting main body case 13 toward the lower front side, and the upper rear surface side of the charging case 32 is communicated with the upper side of the second lifting case body 11a. The left side surface is in communication with the transport case 31. Further, the input case 32 forms a discharge path 32a through an inclined wall that is inclined downward toward the transport case 31 side (lower left), and is supplied from the upper side of the second lifting case body 11a. An object is smoothly guided to the conveyance case 31 side, and a clogging sensor 35 is provided at a position facing the inclined wall to detect clogging of the second item (lifted item) in the discharge path 32a.

In the threshing device 6 including the forward reduction transport spiral portion 11b, the second thing is opened at the tip of the transport case 31 through the switching operation of the path switching mechanism 33 when performing threshing work such as rice and wheat. A reduction process is performed by conveying and supplying the inside of the chamber 15a from the chamber-side discharge port 31a. In the case of a relatively large granular processed product such as soybean, the sorting unit 16 is discharged from the sorting unit side discharge port 31b opened in the middle of the transport case 31 through the switching operation of the path switching mechanism 33. It is possible to carry out the reduction process by feeding it into the interior.
Further, when the clogging sensor 35 installed in the discharge path 32a formed in the upper part of the transporting body case 13 detects clogging of the transported material in the discharge path 32a, the buzzer is activated by this detection signal to clog the operator. Is generated, and the engine is stopped to stop the combine work.

  The threshing apparatus 6 configured as described above threshs the harvested cereals in the handling chamber 15a, filters the grains from the receiving net 18, and processes a relatively large waste or the like remaining on the receiving net 18. It is transferred to the rear end side of the handling chamber 15a by the transfer action of the helical plate-like handle teeth 17b, dropped from the rear end portion of the receiving net 18 to the discharge portion 7, and discharged outside the machine. Further, the sorting unit 16 swings and sorts the processed grains and sawdust from the receiving net 18 and the second product reduced and supplied from the sorting unit side discharge port 31b through the switching operation of the path switching mechanism 33. Sorting is performed by the body 20. The first item selected by the selection unit 16 such as the selected grain is stored in the Glen tank 5 via the first conveyor device 10, and the second item containing the grain sawdust is the second conveyor. Reduction processing is performed in the handling chamber 2 or the sorting unit 16 through the apparatus 11, and the dust is discharged from the rear end side of the sorting case 28 to the outside by the sorting wind from the second sorting fan 31 as described above. Is done.

  On the other hand, in the threshing operation as described above, when a second thing is clogged in the second conveyor device 11, the clogging sensor 35 detects this and notifies the operator of the clogging state and stops the engine. Therefore, the occurrence of a larger clogging trouble can be prevented. Then, the operator can perform a special maintenance operation of the second conveyor device 11 in a state where the Glen tank 5 is switched to the maintenance operation posture, and remove the clogged feed (clogged material).

Next, the structure of the lifting case body 10a of the first conveyor device 10 and the lifting case body 11a of the second conveyor device 11 and its lid structure will be described with reference to FIGS. First, the first conveyor device 10 and the second conveyor device 11 serving as a grain conveyor device are cross-sectional views of the main body case 13 that forms the main body portion of the upper case body 10a and the upper case body 11a. The shape and the lid structure and the installation structure such as the conveyor 25 to be installed are made common.
Note that the difference between the two in the embodiment is that the length of the lifting main body case 13 of the first conveyor device 10 is shorter than the lifting main body case 13 of the second conveyor device 11 and each upper lid provided at the upper end of both. The size and shape of 37 are different.

The above-mentioned lifting main body case 13 is obtained by bending the frame case 13a into a U-shape in a plan view of a single iron plate, whereby a left side wall (back wall) 13b, a front side wall (standing wall) 13c, and a rear side wall (standing wall) ) 13d are integrally formed, and the free ends of the front side wall 13c and the rear side wall 13d are extended to provide a side wall attachment end side 13e to form a right side opening (front opening).
Then, the lifting main body case 13 has a frame case 13a by fitting and fixing the case frame wall 28, which is inwardly U-shaped in plan view, to the lowermost part of the front side wall 13c and the rear side wall 13d. The lower side rigidity is increased without increasing the vertical width.
As a result, the case frame wall 28 having a rigid structure stably supports the right end of the helical shaft 26 of each helical body via a bearing metal 28a attached to the center portion thereof, and is hand-operated from an opening formed vertically. Various maintenance work that is performed by inserting can be performed efficiently and easily.

  Further, as shown in FIG. 8, the lifting main body case 13 has a front lower wall 40 having a bent rib-shaped attachment side 13f to be joined in a fitted state in the front and rear side wall attachment end sides 13e, and an intermediate wall. A case right side wall (case front wall) 13g as a right side wall that closes the entire length of the right side opening by attaching a front middle wall (upper opening lid) 41 and a front upper wall 42 as a series from below. Forming. As a result, the lifting main body case 13 has a rectangular cross section that is long in the front-rear direction, and the left side wall 13b is attached and fixed to the right side wall (machine wall) 6b of the threshing device 6, and the case body right side wall 13g. The lid structure that closes a plurality of locations in the vertical direction so as to be openable and closable is configured on the front side in the maintenance work direction.

  That is, the lifting main body case 13 is fitted with the front lower wall 40 having a length covering the lower half of the right opening, and the front upper wall 42 is fitted to the uppermost part of the right opening. The upper opening 43 formed between the front lower wall 40 and the front upper wall 42 is made rigid by joining the attachment side 13e and the attachment side 13f opposite to each other by a joining means such as a bolt or welding. It is possible to form long without damaging the. As a result, even when the grains are clogged from above, the lifting main body case 13 opens a wide range in the upper middle part, so that the clogging can be easily removed and the hose nozzle is inserted into the case. Easy cleaning.

  The upper opening 43 is provided with an upper opening lid 41 by attaching / detaching means capable of increasing the case rigidity at the time of closing and quickly opening and closing. This attaching / detaching means is such that each attachment side 13f is overlapped with the left and right side wall attachment end sides 13e, and the knob bolts 45 penetrating them are used as attachments to tighten the right and left three places with appropriate attachment intervals. I try to fix it. Accordingly, when the upper opening 43 is closed and all the knob bolts 45 are fastened, the upper opening lid 41 becomes a reinforcing rib in which the left and right side wall attachment end sides 13e and the attachment sides 13f are overlapped. Even when a long and wide upper opening 43 is formed on the upper side of the middle part, a rigid structure is obtained by rib-like polymerization.

  On the other hand, since the front lower wall 40 has the same joining structure as the reinforcing rib-like superposition structure on both sides of the long lower half, the main body case 13 of the first conveyor device 10 and the second conveyor device 11 is It has a highly durable rigid structure that has sufficient strength against the lower load of the lower half where the upper dead weight is greatly applied. The front lower wall 40 is formed into a rectangular small window having a size necessary for normal maintenance work at a low position where the lower opening 43a can reach the sprocket 23 portion of the conveyor 25, and the front lower wall 40 Since an opening is formed at an intermediate portion of the width, a simple lid structure that does not impair the rigidity of the front lower wall 40 is formed.

  The lower opening lid 46 is sized so as to overlap with the peripheral wall of the opening hole of the front lower wall 40 when the lower opening 43a is closed, and is overlapped with the lower opening lid 46. In the closed state, the upper and lower overlapping surfaces at the upper and lower width centers are two attachment means for fastening and fixing to the front lower wall 40 by the knob nut 47. In other words, the lid structure of the lower opening lid 46 shown in the figure can perform normal maintenance work such as visual inspection and lubrication work or simple cleaning of the conveyor 25, the sprocket 23, etc. of this part without any trouble. The lid structure has a minimum size and shape that does not impair strength.

The first conveyor apparatus 10 and the second conveyor apparatus 11 including the lifting main body case 13 configured as described above detachably cover the upper end opening of each lifting main body case 13 with the upper lid 37, and the lower end opening. Is detachably covered by the lower lid 38.
The upper lid 37 is provided with a triangular pyramid-shaped corner guide 37a projecting downward at required positions at the four or two corners of the back of the lid. As a result, each upper lid 37 increases the rigidity at the upper opening end side by fitting the corner guide 37a in the closed state where the corner guide 37a is fitted into the corner portion of each upper end opening and bolted, and also the grains and straws In order to guide the movement of debris, adhesion and clogging at this part are prevented and smooth conveyance is promoted.
On the other hand, the lower lid 38 is detachably attached by a one-touch switching operation type hook mechanism 48 provided at the front and rear lower ends of the lifting main body case 13, and when the lower lid 38 is removed from the machine by switching the hook mechanism 48. The lower end opening 43b can be fully opened, facilitating various maintenance operations such as cleaning the inside of the case and the transmission portion and attaching / detaching the sprocket 23.

Next, the sprocket mounting structure will be described with reference to FIG. 5, FIG. 6, FIG. 9, and FIG.
First, as shown in FIGS. 5 and 6, the helical shaft 26 of the first spiral 22 has a different number of teeth at the center of the shaft hole with respect to the outer surface of the disk-shaped sprocket seat 26a having four screw holes 26d. By attaching the pair of the first half sprocket 23a and the second half sprocket 23b which are divided into two, the sprocket 23 of the high yield pumping specification is detachably and replaceably provided.

That is, this sprocket mounting structure is a two-part symmetrical shape standard quantity feed specification (for standard feed speed) sprocket having an even number of projection teeth 50 (not shown) that drives the conveyor 25 of the first conveyor device 10 at a standard speed. After removing 23, the sprocket seat 26a has an odd number of protruding teeth 50 having a larger number of teeth than the standard amount lifting specification sprocket 23, and is driven at a high speed. The aspect which comprises the (two-part asymmetric shape type | mold) 23 so that attachment or detachment is possible is shown.
In addition, the two-part symmetrical shape type standard quantity lift specification sprocket 23 is a straight-line division that divides the central part of the tooth root 51 opposite to the central point P of the shaft hole 52 in the diametrical direction by a known processing means. The first half sprocket 23a and the second half sprocket 23b having a symmetrical shape and an even number of teeth are manufactured via the line (lateral center line P1).

On the other hand, the odd-tooth sprocket 23 shown in FIGS. 9 and 10 has a dividing line that forms the first half sprocket 23a and the second half sprocket 23b at the center of the arbitrary tooth root 51 and the center of the shaft hole 52. A shaft hole parting line L that makes the shaft hole 52 part a true half from the central part of the tooth root part 51 so as to connect the midway part of the protruding tooth 50 side facing the P, and an end of the shaft hole parting line L A refraction line K that is bent in the circumferential direction from the portion, and a tooth valley dividing line R that connects the end of the refraction line K and the central portion of the tooth root portion 51 adjacent to the opposing protruding tooth 50.
And the four attachment holes 55 which insert the volt | bolt 27 are drilled in the symmetrical location of the up-down and left-right through the shaft hole division line L and the center point P. As shown in FIG. The refracting line K is preferably positioned in the vicinity of the circumference connecting the bolts 27.

As a result, the first half sprocket 23a and the second half sprocket 23b avoid the division of the projecting teeth 50 located on the lateral center line P1 facing the tooth root 51 on the extension of the shaft hole division line L, Since the central portion of the adjacent root portion 51 is divided into two in the diametrical direction, the sprocket can be divided without impairing the tooth strength, and the odd-numbered sprocket 23 can be easily manufactured.
When the dividing surfaces of the first half sprocket 23a and the second half sprocket 23b are brought into contact with each other and the shaft dividing lines L and the valley dividing lines R are brought into contact with each other, both are formed via the refraction line K. It is possible to form a fitting structure by forming an engaging portion 56 for engaging the concave portion 56a and the convex portion 56b. As a result, the first half sprocket 23a and the second half sprocket 23b can quickly detect and correct reversal joining that is opposite to the longitudinal center line P2 that is likely to occur at the time of assembling, and the diameters of both. Since the relative displacement of the direction is restricted, there is an advantage that the installation work can be simplified efficiently.

  The combine provided with the first conveyor device 10 and the second conveyor device 11 configured as described above, when performing the normal maintenance work and the special maintenance work, the grain tank 5 is largely rotated rightward and the threshing device. The maintenance work posture with the right side of 6 greatly released is set. And when performing the normal maintenance operation | work with the 1st conveyor apparatus 10 and the 2nd conveyor apparatus 11, in the state which removed the upper opening cover 41 via the said two knob nuts 47 shown in FIG. 4, it is from the lower opening part 43a. The inside of the conveyor 25 and the sprocket 23 can be visually inspected for abnormality and normal maintenance operations such as lubrication and cleaning can be performed without any trouble.

  After the normal maintenance is completed, a series of normal maintenance work is performed by covering the lower opening 43a with the lower opening lid 46 and fastening the two knob nuts 47 to return the Glen tank 5 to the original working posture. Complete and start the combine work. At the end of the combine work, the maintenance work and the removal and cleaning of the sawdust are performed as necessary when the work is started.

  In addition, special maintenance work such as complete cleaning is performed when transport clogging occurs in the second conveyor device 11 or the first conveyor device 10 due to mowing and threshing of wet cereals or when switching to a combine operation for harvesting different crops. In the maintenance work posture of the Glen tank 5, the six knob bolts 45 are loosened, the upper opening lid 41 is removed as shown in FIG. 4, the upper opening 43 is opened, and the two knob nuts 47 are loosened and lowered. The opening lid 46 is removed to open the lower opening 43a. Further, the upper lid 37 is removed to open the upper end opening of the lifting main body case 13, and the lower lid 38 is removed to open the lower end opening 43b.

  Thus, the clogging on the front upper wall 41 side is sequentially scraped and removed while manually removing the clogging on the front side from the upper opening 43 having a large opening, and then the hand is placed in the lower opening 43a. The lifted material stagnated on the lower side of the conveyor 25 is removed. Further, cloggings such as the discharge path 32a in the upper part of the feeding main body case 13 and the input case 32 are removed from the opened upper end opening. Next, after substantially removing cloggings such as sawdust, the washing main body case 13 is washed away, the hose nozzle is inserted from above into the case upper end opening, and the front side of the conveyor 25 is washed. From the upper opening 43, the dirt such as the conveyor 25 and deposits can be washed away.

The combine A that can clean the inside of the lifting main body case 13 as described above performs the sprocket replacement work (replacement work) of the conveyor 25 with the case frame wall 28 opened and closed in a clean environment. Therefore, it is possible to facilitate switching from the standard yield combine operation to the high yield combine operation.
Next, a description will be given of a sprocket replacement work mode in the case where the two-part symmetric shape standard lifting specification sprocket is changed to a two-part asymmetric shape type multi-yield lifting specification sprocket having a larger number of teeth.

  In this combine A, the lowermost part of the front side wall 13c and the rear side wall 13d of the lifting main body case 13 is connected by a case frame wall 28 that pivotally supports one end of the helical shaft 26, and the front lower portion is formed above and below the case frame wall 28. The wall 40 and the lower lid 38 are provided to be openable and closable, and the sprocket seat 26a provided on the helical shaft 26 is divided into two at the center of the shaft hole to form a pair by a first half sprocket 23a and a second half sprocket 23b. Since a plurality of sprockets 23 having different numbers of teeth are configured to be detachable and replaceable, when the front lower wall 40 or the lower opening lid 46 and the lower lid 38 are first opened, the upper and lower sides of the case frame wall 28 are largely opened. can do.

As a result, the operator inserts his hand from the upper opening and removes one half sprocket located above the standard lifting specification sprocket from the sprocket seat 26a, and then removes the other half sprocket located below from the lower opening. Next, the high-yield lift specification sprocket 23 is replaced and attached to the sprocket seat 26a. In this mounting operation, it is desirable to first insert the first half sprocket 23a from the lower opening and fasten the two bolts 27, and then assemble the other second half sprocket 23b from the upper opening.
That is, the high-yield lifting specification sprocket 23, which is an odd number of teeth, is installed on the lower surface of the sprocket seat 26a while fitting the first half sprocket 23a with the half shaft shaft 52 to the helical shaft 26. And a trough-shaped recess can be formed between the peripheral surface of the helical shaft 26 and the refracting line K with the dividing surface facing upward.

Next, the second half sprocket 23b is inserted in a state in which the dividing surface faces downward from the upper opening, and a mountain-like convex portion formed by the convex portion 56b between the half-half shaft hole 52 and the refraction line K, When the concave portion formed by the first half sprocket 23a is fitted as an index and positioned and engaged, the proper contact of the dividing surface between the shaft hole dividing line L and the tooth dividing line R is facilitated easily using this as a starting point. be able to.
The second half sprocket 23b can naturally align the mounting holes 55 with the screw holes 26d of the sprocket seat 26a, and can quickly insert and fasten the bolts 27 to both. In addition, since the concave and convex portions 56a and 56b formed by refracting lines K are engaged with each other, both of them engage with the concave and convex portions 56b. For example, even when this portion is obstructed by the case frame wall 28 and cannot be seen from the outside, Since it can be easily prevented by tactile sensation that the two are reversely joined in the opposite direction, the mounting operation can be performed efficiently.

Therefore, without replacing the first spiral 22 used in the standard yield combine operation, the two-piece asymmetrical shape type multi-yield lift specification sprocket 23 having a larger number of teeth than the standard lift specification sprocket 23 is replaced and attached. When the spiral body is attached to the fuselage, and the case body is disassembled by removing the case frame wall 28 or disassembling the transmission case. Sprocket replacement without impairing the case rigidity of the main body case 13 can be efficiently performed with a simple and inexpensive configuration.
In addition, the sprocket 23 having an odd number of teeth composed of the first half sprocket 23a and the second half sprocket 23b can be manufactured with durability without impairing the sprocket strength, and has a high yield with a desired lifting speed. There are features such that the alternative selection of the sprockets 23 to be paired so as to be able to be lifted can be facilitated, and the intended high-yield combine operation can be made smooth.

A Combine 5 Glen tank 6 Threshing device 6b Machine wall 10 First conveyor device 11 Second conveyor device 13 Lifting body case 13a Frame case 13c Front side wall 13d Rear side wall 22 First helix 22a Second helix 23 Sprocket 23a First half sprocket 23b Second half sprocket 25 Conveyor 25a Conveyor chain 26 Spiral shaft 26a Sprocket seat 28 Case frame wall 38 Lower lid 40 Front lower wall 43a Lower opening 46 Lower opening lid 50 Projection tooth 51 Tooth root 52 Shaft hole L Shaft hole dividing line K refraction line R tooth split line

Claims (2)

The first conveyor device that lifts the first thing from the first spiral (22) through the conveyor (25) along the machine wall (6b) of the threshing device (6) in which the Glen tank (5) is arranged in parallel. (10) or the second conveyor device (11) for lifting the second product from the second spiral (22a) via the conveyor (25) is erected, and the lifting conveyor device is lifted. A conveyor chain (25a) is wound around a drive sprocket (23) and a driven sprocket (23a) that are pivotally supported in the feed body case (13), and the drive sprocket (23) is placed in the first or second spiral body (22 ), (22a) in the conveyor conveyor in the combine that is rotationally driven through the helical shaft (26),
A case frame wall (28) for supporting the lower part of the front side wall (13c) and the rear side wall (13b) of the lifting main body case (13) with respect to the airframe by one end of a helical shaft (26) having a drive sprocket (23). ), And at least one lower wall (40) above and below the case frame wall (28) or a lower lid (38) at the lower end of the lifting body case (13) is provided to be freely opened and closed, and the helical shaft ( A plurality of drives with different number of teeth composed of a first half sprocket (23a) and a second half sprocket (23b) which are formed in two at the center of the shaft hole and are paired with the sprocket seat (26a) provided in 26) A transport conveyor device in a combine, wherein the sprocket (23) is attached to be selectively replaceable.   The drive sprocket (23) includes a shaft hole dividing line (L) that makes the shaft hole (52) part a half from the center of the arbitrary tooth root (51), and an end of the shaft hole dividing line (L). From the above-mentioned arbitrary tooth root part (51), by dividing into two by the tooth root parting line (R) connecting the central part of the tooth root part (51) adjacent to the protruding tooth (50) facing the diameter direction, 2. The conveying conveyor apparatus for a combine in a combine according to claim 1, wherein the number of teeth of the first half sprocket (23a) and the second half sprocket (23b) are different.

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