CN112136512A - Crawler travel device and harvester - Google Patents
Crawler travel device and harvester Download PDFInfo
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- CN112136512A CN112136512A CN202010966601.3A CN202010966601A CN112136512A CN 112136512 A CN112136512 A CN 112136512A CN 202010966601 A CN202010966601 A CN 202010966601A CN 112136512 A CN112136512 A CN 112136512A
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- screen
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- frame
- dust suction
- crawler
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Images
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/10—Feeders
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/02—Self-propelled combines
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D67/00—Undercarriages or frames specially adapted for harvesters or mowers; Mechanisms for adjusting the frame; Platforms
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/44—Grain cleaners; Grain separators
- A01F12/444—Fanning means
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/44—Grain cleaners; Grain separators
- A01F12/446—Sieving means
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/54—Arrangements for collecting or removing dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/10—Bogies; Frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/14—Arrangement, location, or adaptation of rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/14—Arrangement, location, or adaptation of rollers
- B62D55/15—Mounting devices, e.g. bushings, axles, bearings, sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/30—Track-tensioning means
Abstract
The invention provides a crawler travel device with improved installation structure of rollers relative to a crawler frame. The crawler apparatus includes: a crawler belt (26) wound over a drive sprocket (21) and a tension sprocket (22), the drive sprocket (21) being disposed at the front of a crawler frame (20) supported by the machine body frame (3), the tension sprocket (22) being disposed at the rear of the crawler frame (20); and a plurality of rollers (23) for guiding the crawler belt (26) to the ground. The crawler belt type crawler belt device comprises an installation unit (60) extending along the front-back direction of a machine body, wherein the installation unit (60) can be detachably installed on an installation component (6) arranged on a crawler belt frame (20). The mounting unit (60) supports the rollers (23) arranged in the front-rear direction of the vehicle body with a plurality of bearings as units.
Description
The present application is a divisional application of the invention patent application having application number 201710685944.0 entitled "crawler travel device and harvester".
Technical Field
The invention relates to a crawler travel device and a harvester.
Background
[1] A crawler travel device is known from patent document 1: a driving chain wheel and a tension chain wheel are arranged at the front end and the rear end of the crawler frame extending along the front-rear direction of the vehicle body, and a plurality of rollers are arranged on the lower surface of the crawler frame between the driving chain wheel and the tension chain wheel. In this crawler travel device, a thick mounting plate is fixed to the lower surface side of the crawler frame by welding or the like, and a support body that axially supports the support shaft of the support roller is bolted to the lower surface of the mounting plate. The support body includes a boss portion that pivotally supports the support shaft, and a flange portion that extends upward from the boss portion and has a T-shaped cross section. The flange portion is provided with a through hole, and the mounting plate is provided with a female screw coaxial with the through hole. The upper surface of the flange portion is engaged with the lower surface of the mounting plate, and the flange portion is bolted to the mounting plate, whereby the support body is detachably fixed to the mounting plate, i.e., the track frame. The support body is made as a cast member in which a boss portion supporting one roller is cast integrally with a flange portion, one support body corresponding to one roller. That is, since one support body is provided for each roller, when the number of rollers is large, the number of assembly steps increases, and the manufacturing cost of the support body increases. When all the rollers are removed for maintenance, inspection, and the like, each roller falls to seventy-eight.
[2] As the harvester described above, for example, a harvester described in patent document 2 is known. The harvester described in patent document 2 includes a dust suction fan (in the document, a suction and discharge fan) and a catching member (in the document, a net body). The dust suction fan sucks dust in a feeder case (in the literature, a feeder housing) from a dust suction port and discharges the dust to the outside. The catching member is mounted to the dust suction port to catch the straw flowing toward the dust suction fan. Thus, the straw can be prevented from being sucked into the dust suction fan.
[3] Conventionally, threshing devices equipped with such a harvester have been known. For example, a threshing device described in patent document 3 includes: a front grain tray provided at the front end of the upper part of the sieve box; a plurality of screen lines extending from the rear end of the front grain tray to the rear in a state of being arranged at predetermined intervals in the left-right direction; an auxiliary grain tray arranged at the front upper part of the screen box in a mode of being positioned at the rear lower part of the front grain tray; and a plurality of auxiliary screen lines which are arranged at predetermined intervals in the left-right direction and extend from the rear end part of the auxiliary grain tray to the rear. The screen line and the auxiliary screen line screen the processed product, and convey the crushed straw and the like toward the rear while allowing the single grain and the grain with branches and stalks and the like to leak down.
[4] Conventionally, as shown in patent document 4, an operation lever (in the document, "main shift lever") is disposed on the left of a seat in a steering section. In the technique described in patent document 4, a first command input mechanism (in the document, "a cut-off lifter switch") and a second command input mechanism (in the document, "a reel cross switch") are provided on a rear surface of a grip portion of an operation lever.
According to the technique described in patent document 4, the input operation of the first command input means and the second command input means can be performed by one finger (e.g., thumb) of the left hand in a state where the operation lever is held by the left hand, and the operation commands to the plurality of control targets can be performed by one hand.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2003-276661
Patent document 2: japanese patent laid-open publication No. 2003-174815
Patent document 3: japanese patent laid-open publication No. 2007-20419
Patent document 4: japanese patent laid-open No. 2007-244335.
Disclosure of Invention
Problems to be solved by the invention
[1] The problems corresponding to the background art [1] are as follows.
In light of the above-described circumstances, a crawler travel device that improves the support structure of the rollers with respect to the track frame is desired.
[2] The problems corresponding to the background art [2] are as follows.
In the conventional harvester described above, the catching member is formed of a net-like member, that is, the catching member includes a plurality of rod-like members arranged so as to cross each other across the dust suction port, and therefore the caught straw is easily wound around the catching member. Also, when a large amount of straw is wound around the catching member, the straw (straw aggregate) wound around the catching member becomes resistance, and it is difficult for the dust suction fan to suck dust.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a harvester in which captured straw is not easily entangled with a capturing member.
[3] The problems corresponding to the background art [3] are as follows.
However, in the threshing device described in patent document 3, the screen wire and the auxiliary screen wire are formed to be substantially flat in a side view (to extend substantially linearly in a horizontal direction), and therefore there is room for improvement in that the processed object is smoothly conveyed rearward.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a harvester including: the threshing device can smoothly convey threshed products from a grain tray by a sieve line and simultaneously perform sorting.
[4] The problems corresponding to the background art [4] are as follows.
However, in the technique described in patent document 4, since the first command input means and the second command input means of different input operation modes are disposed on the same surface, there is a possibility that both means may be mistakenly operated, and complicated finger (e.g., thumb) operation is required, and there is a case where operation input cannot be performed particularly desirably when the operation levers are simultaneously operated.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a harvester which is less in erroneous operation of an operation lever including two command input mechanisms and which is excellent in operability.
Means for solving the problems
[1] The solution corresponding to the problem [1] is as follows.
In order to solve the above problem, a crawler travel device according to the present invention includes: the crawler frame extends along the front and back direction of the machine body and is supported on the machine body frame; a drive sprocket disposed at a front portion of the track frame; a tension sprocket disposed at a rear portion of the track frame; a crawler belt wound over the drive sprocket and the tension sprocket; and a plurality of rollers for guiding the crawler belt to the ground, wherein the crawler belt is provided with a mounting unit which is detachably mounted on a mounting member and extends along the front and back direction of the machine body, the mounting member is arranged on the crawler belt frame, and the mounting unit is used for supporting the rollers which are arranged along the front and back direction of the machine body by taking a plurality of rollers as units.
According to this configuration, since the plurality of rollers are supported by the bearings in the mounting unit detachably fixed to the track frame, the plurality of rollers can be integrally removed from or attached to the track frame. And each roller cannot fall seven-eighths.
The mounting unit that handles the plurality of rollers as a unit is a simple structure, and it is required to easily perform the attaching and detaching operation with respect to the track frame. In a preferred embodiment of the present invention, the mounting means is composed of a channel member extending in the front-rear direction of the machine body and opening downward, and a boss member disposed at a distance in the front-rear direction of the machine body, the bottom plate portion of the channel member is bolted to the mounting means, and a roller shaft to which the roller is attached is journaled on the boss member. Since the mounting unit is provided with the elongated channel member and the boss member that pivotally supports the roller shaft on the opening side of the channel member in accordance with the arrangement pitch of the rollers, the plurality of rollers that are unitized are fixed to the track frame only by bolting the mounting unit to the track frame using the bottom plate portion of the channel member. Further, since the bolt is fixed by using the bottom plate portion of the channel-shaped member, the bolt fastening portion is positioned in the channel of the channel-shaped member, and intrusion of muddy water and foreign matter from the outside can be suppressed.
In order to reduce the weight, a relatively thin-walled angular tube is often used for the track frame. Therefore, when the attachment unit is bolted to the track frame, it is preferable that the attachment member located between the track frame and the attachment unit receive the bolt fastening force. In a preferred embodiment of the present invention, the mounting member is a reinforcing plate fixed to a frame body constituting the track frame, and the reinforcing plate is formed with female screws (holes formed with female screws) for fixing the bolts. Since the presence of the mounting member at a position other than the bolt fixing position leads to a heavy load, it is preferable to have only the mounting member at the bolt fixing position. Therefore, the mounting member may be configured as a plurality of mounting member pieces arranged at intervals in the front-rear direction of the machine body. By providing such a mounting member with a shape and a size that can function as a reinforcing plate of the track frame, the need for an additional reinforcing plate for the track frame is reduced.
In one preferable specific configuration of the mounting unit, the groove-shaped member is a long member having a U-shaped cross section, and includes a bottom plate portion abutting against the mounting member and a pair of left and right side plate portions extending from respective side edges of the bottom plate portion, and the boss member is joined so as to straddle the pair of left and right side plate portions. That is, the channel-shaped member is made of a steel material having a known simple shape as channel steel and is used facing downward, and the boss member is joined only to the edge of the side plate portion by welding or the like, which is advantageous in terms of manufacturing cost.
In order to prevent the boss member from being out of the way during the fastening operation of the fixing bolt for fixing the mounting unit to the track frame, in a preferred embodiment of the present invention, mounting holes for bolt fixing are formed in the bottom plate portion of the channel-shaped member at intervals in the machine body front-rear direction, and the boss member is joined to the mounting holes at the middle of the mounting holes at intervals in the machine body front-rear direction.
In one preferable embodiment of the present invention relating to the mounting structure of the tension sprocket, a support rod of the tension sprocket extending in a front-rear direction of the machine body is supported by the track frame so as to be displaceable along an extending direction of the track frame, the track frame is a cylindrical body, the support rod has an outer cross section that coincides with or substantially coincides with an inner cross section of the cylindrical body, the support rod is guided by an inner surface of the track frame to slide in the track frame, and a length of the mounting member and a length of a bolt for bolting a floor portion of the channel member to the mounting member are set such that a tip end of the bolt enters the track frame and does not interfere with the support rod. The mechanism for moving the tension sprocket in the front-rear direction of the machine body is composed of a support rod sliding inside a cylinder forming the track frame, thereby reducing additional guide members and enabling the structure around the track frame to be neat.
The roller is composed of: the roller shaft has protruding portions protruding from both ends of the boss member, and a roller half body constituting the roller is fixed to each protruding portion, whereby the protrusions of the crawler belt are brought into contact from the outside, and the crawler belt can be guided well.
In a preferred embodiment of the present invention, a crawler guide extending in the front-rear direction of the machine body and guiding the lower return belt edge of the crawler is bolt-coupled to the trough-shaped member in a posture of being sandwiched between the side plate portions of the trough-shaped member. With this configuration, the mounting unit can mount not only the rollers to the track frame but also the crawler guide to the track frame in a stable double-supported manner, which is advantageous in terms of quality and cost. Further, the guide wheel for guiding the upper return belt edge of the crawler is attached to the crawler frame via the bracket, so that the bracket is simply structured to extend straight upward from the crawler frame toward the upper return belt edge, which is also advantageous in terms of quality and cost.
[2] The solution corresponding to the problem [2] is as follows.
The present invention is characterized by comprising: a feeder having a feeder tank having a dust suction port formed in a top plate, and transporting harvested straw in the feeder tank; a dust suction fan for sucking the dust in the feeder box from the dust suction port and discharging the dust to the outside; and a catching member attached to the dust suction port and catching straw flowing toward the dust suction fan, wherein the catching member includes a plurality of rod-shaped members arranged so as not to cross each other across the dust suction port.
According to this characteristic configuration, in the catching member, the plurality of rod-like members are arranged so as not to intersect with each other across the dust suction port. That is, in the catching member, the gap between the rod-like members adjacent to each other among the plurality of rod-like members is formed over the entire length of the dust suction port. Therefore, even if the straw flowing toward the dust suction fan is caught by the plurality of rod-like members, entanglement of the straw is less likely to occur between the plate-like members adjacent to each other among the plurality of plate-like members.
Further, in the present invention, it is preferable that the plurality of rod-like members are substantially parallel to a conveying direction of the feeder.
Typically, most of the straw in the feeder box is transported in a posture crossing the direction of transport of the feeder. According to this characteristic configuration, since the plurality of plate-like members are substantially parallel to the feeding direction of the feeder, that is, the longitudinal direction of the straw intersects with the direction of the plurality of rod-like members, the plurality of plate-like members easily act on the straw, and the straw flowing toward the dust suction fan can be firmly caught.
Further, in the present invention, it is preferable that the rod-like member is a round rod.
According to the present characteristic configuration, since the rod-like members have no corners, the straw is not easily wound around the rod-like members, and since the straw is not easily cut by the rod-like members, the occurrence of straw chopping sucked into the dust suction fan can be reduced.
Further, in the present invention, it is preferable that the dust suction fan is rotated about a horizontally oriented axis.
According to this characteristic configuration, since the dust suction fan is not opposed to the dust suction port in the axial direction of the dust suction fan, the straw is not easily brought into direct contact with the dust suction fan even if the straw flows from the dust suction port toward the dust suction fan.
Further, in the present invention, it is preferable that the catching member is configured to be attachable to and detachable from the feeder tank.
According to this characteristic configuration, since the catching member can be removed and replaced, the maintainability can be improved.
Further, in the present invention, it is preferable that the dust suction fan includes a fan housing covering the dust suction fan, and the catching member is supported by being sandwiched between a ceiling plate of the feeder box and a lower end of the fan housing.
According to this characteristic configuration, the catching member can be stably supported.
Further, in the present invention, it is preferable that the fan case includes a projecting portion projecting upward from the top plate, and the catching member and a lower end of the fan case are fastened and coupled to the projecting portion together by a fastening member.
According to this characteristic configuration, the catching member and the fan case can be connected to the projecting portion in a concentrated and simple manner. Further, the projecting portion facilitates positioning of the catching member and the fan case.
Further, in the present invention, it is preferable that the fan case includes a pressing member that presses a lower end of the fan case from above, and the pressing member is fastened and coupled to the projecting portion together with the fan case and the catching member by the fastening member.
According to this characteristic configuration, the pressing member, the fan case, and the catching member can be connected to the projecting portion in a concentrated and simple manner. Further, the projecting portion facilitates positioning of the pressing member, the fan housing, and the catching member.
Further, in the present invention, it is preferable that the fastening member is a wing nut or a knob nut.
According to this characteristic configuration, since the fastener can be tightened and loosened by hand without using a tool, workability can be improved.
Further, in the present invention, it is preferable that a motor for driving the dust suction fan is provided, and a circuit breaker for the motor is provided adjacent to the dust suction fan.
According to this feature, since the circuit breaker is located near the motor, the wiring between the circuit breaker and the motor can be easily wound.
[3] The solution corresponding to the problem [3] is as follows.
The present invention is characterized in that a grain tray is provided at a conveyance start end side of the screen box, and a screen wire is provided at a conveyance end portion of the grain tray, the screen wire being formed in a substantially wave shape when viewed from a side surface.
According to this characteristic configuration, the screen line is formed in a substantially wave shape, whereby the screen line can exert a conveying action on the threshed objects. Therefore, the threshing processed object from the grain tray can be smoothly conveyed by the sieve line and sorted.
Further, in the present invention, it is preferable that the screen wire is inclined so as to rise toward the conveying terminal side when viewed from the side.
According to this characteristic configuration, the return action of the threshed objects can be exerted by the sieve wire by inclining the sieve wire. Therefore, by returning the threshed product from the grain pan to the conveyance starting end side by the screen, a large number of sorting opportunities by the screen can be ensured.
Further, in the present invention, it is preferable that a plurality of the screen lines are provided at a conveying end portion of the grain tray, and the plurality of screen lines are arranged in parallel in a conveying direction in the screen box.
According to this characteristic configuration, the threshed products from the grain pan are sorted in stages by the plurality of screens, and thereby the sorting accuracy can be improved.
Further, in the present invention, it is preferable that, among the plurality of wires, the wire on the conveyance terminal side is provided at a position higher than the wire on the conveyance starting side.
According to this characteristic configuration, the threshed objects fall from the screen line on the conveying terminal side located at the high position, and the impact of the falling object causes the pieces of threshed objects to be broken, thereby improving the sorting accuracy.
Further, in the present invention, it is preferable that, among the plurality of wires, the conveyance end side of the wire on the conveyance start end side is provided at a position higher than the conveyance start end side of the wire on the conveyance end side.
According to this characteristic configuration, since there is a step between the conveyance end side of the screen line on the conveyance start end side and the conveyance start end side of the screen line on the conveyance end side, the threshed objects are less likely to be clogged during the transfer between the screen line on the conveyance start end side and the screen line on the conveyance end side. Further, the threshed objects fall from the conveying end side of the screen wire on the conveying start end side to the conveying start end side of the screen wire on the conveying end side, and the threshed object pieces are broken by the impact of the falling threshed objects, so that the sorting accuracy can be improved.
Further, in the present invention, it is preferable that the plurality of wires are inclined so that the conveying end side rises in a side view, and the inclination angle of the wire on the conveying end side is larger.
According to this characteristic configuration, the more the sieve wire on the conveying terminal side is inclined, the more the conveying terminal side is, the greater the returning action applied to the threshed processed object by the sieve wire is. Therefore, the threshed processed object at the conveying terminal end side is largely returned to the conveying starting end side by the screen wire, and thereby, the sorting chance by the screen wire can be ensured to be large.
Further, in the present invention, it is preferable that the grain sorting device further includes a wind turbine for supplying sorting wind to a conveyance end portion of the grain tray in the screen box, and a predetermined gap is formed between a conveyance end portion of one screen and a conveyance start end portion of another screen among the plurality of screens adjacent to each other in the conveyance direction.
According to the present characteristic configuration, since the separation wind blows through the gap between one screen wire and the other screen wire, the separation wind smoothly flows. In addition, the threshing device has the advantages that gaps exist between one screen line and the other screen line, so that threshing objects are not easy to block during the connection period of the one screen line and the other screen line.
Further, in the present invention, it is preferable that a coarse screen is provided below the screen wire in the screen box, and the gap overlaps with a conveyance starting end side of the coarse screen in a plan view.
According to this feature, even if the threshed processed object falls from the gap between the one screen line and the other screen line, the threshed processed object falls onto the conveyance starting end side of the scalping screen, and therefore, the threshed processed object falling from the gap between the one screen line and the other screen line can be continuously delivered to the scalping screen.
Further, in the present invention, it is preferable that the screen box is provided with a coarse screen below the screen wire, and the screen wire on the conveyance terminal side of the plurality of screen wires is arranged above the conveyance starting end side of the coarse screen, and at least a part of the screen wire overlaps the conveyance starting end side of the coarse screen in a plan view.
According to this characteristic configuration, since the threshed processed object from the screen line on the conveyance starting end side falls onto the conveyance starting end side of the scalping screen, the threshed processed object falling from the screen line on the conveyance starting end side can be continuously delivered to the scalping screen.
Further, in the present invention, it is preferable that a first type collecting portion is provided below the coarse screen, and the screen wire on the conveyance terminal side of the plurality of screen wires is arranged above the first type collecting portion, and at least a part of the screen wire overlaps the first type collecting portion in a plan view.
According to this characteristic configuration, since the threshed objects from the screen line on the conveying terminal side fall onto the first-type collecting unit, the threshed objects falling from the screen line on the conveying terminal side can be collected by the first-type collecting unit.
Further, in the present invention, it is preferable that at least a part of the screen wire protrudes upward from an upper side portion of the screen box.
According to this characteristic configuration, the threshed objects fall from the screen line on the high-position conveyance terminal side, and the impact of the falling object breaks the pieces of threshed objects, thereby improving the sorting accuracy.
Further, in the present invention, it is preferable that the grain sorting device further includes a wind turbine for supplying sorting air to a conveyance end portion of the grain tray in the screen box, the wind turbine including: a first air passage through which the sort air supplied to the lower portion of the screen box flows; and a second air passage through which the sort air supplied to the upper portion of the screen box flows, the second air passage supplying the sort air to the conveyance starting end side of the screen box.
According to this characteristic configuration, the sorted air is supplied separately to the lower portion and the upper portion of the screen box by the first air passage and the second air passage, and the sorted air can be distributed to the lower portion and the upper portion of the screen box. Further, by supplying the sort air to the conveyance start end side of the screen box by the second air passage, the sort air can be made to pass from the conveyance start end side to the conveyance end side of the screen box.
Further, in the present invention, it is preferable that the grain tray is provided only at a conveyance start end portion of the sieve box.
According to this characteristic configuration, the grain tray is set short, and the area under the drain of the drain sorting unit is set large, so that the grain recovery rate can be improved.
Further, in the present invention, it is preferable that the wind turbine includes a screen box and a wind turbine for supplying the sorting wind to the screen box, and the wind turbine includes: a first air passage through which the sort air supplied to the lower portion of the screen box flows; and a second air passage through which the sort air supplied to the upper portion of the screen box flows, the second air passage being formed to extend in the conveyance starting end side direction and to make a U-turn in the conveyance ending end side direction, and the second air passage being formed to supply the sort air to the conveyance starting end side of the screen box.
According to this characteristic configuration, the sorted air is supplied separately to the lower portion and the upper portion of the screen box by the first air passage and the second air passage, and the sorted air can be caused to pass from the lower portion to the upper portion of the screen box. Further, by supplying the sort air to the conveyance start end side of the screen box by the second air passage, the sort air can be made to pass from the conveyance start end side to the conveyance end side of the screen box. As a result of the second duct being formed in the U-turn, the duct length of the second duct is increased, and the flow of the sort air is likely to become a laminar flow. Therefore, the sorted air having a stable flow can be supplied.
Further, in the present invention, it is preferable that the wind turbine includes: a blade member rotatable about an axis in a conveyance orthogonal direction in a plan view; and a fan casing covering the blade member, wherein the second air passage communicates with an upper portion of the fan casing on the conveyance starting end side.
According to this characteristic configuration, the second air passage communicates with the upper portion of the fan casing on the conveyance start end side, so that the U-turn-shaped second air passage can be easily configured to supply the sorted air to the U-turn-shaped second air passage on the conveyance start end side of the screen box.
Further, in the present invention, it is preferable that a third duct through which the sorted air from the second duct flows is formed in the screen box.
According to this characteristic configuration, the sorted air from the second duct flows through the third duct, and thus the sorted air can be reliably supplied to the upper portion of the screen box.
Further, in the present invention, it is preferable that an inlet portion of the third air passage is provided in the conveyance start end side vertical wall of the screen box.
According to this feature, since the inlet of the third air passage is open on the conveyance starting end side front wall of the screen box, the second air passage and the inlet of the third air passage can be easily connected to each other.
Further, in the present invention, it is preferable that an inlet portion of the third air passage is provided in a conveyance start end side lower wall of the screen box.
According to this characteristic configuration, since the inlet of the third air passage is open at the conveyance start end side lower wall of the screen box, the second air passage and the inlet of the third air passage can be easily connected to each other.
Further, in the present invention, it is preferable that the wind mill includes a screen box and a wind turbine for supplying the sorting wind to the screen box, and the screen box includes: a first grain tray provided on the conveying start end side of the screen box; a second grain tray disposed below the first grain tray; a drop-out sorting section provided at a conveying terminal section of the first grain tray; and a coarse screen provided at a side of a conveying end of the second grain tray, wherein the undersize sorting unit is disposed above the second grain tray and above the coarse screen.
According to this characteristic configuration, the undersize sorting unit is extended above the scalping screen, so that the threshed product roughly sorted by the undersize sorting unit is supplied to the scalping screen. Therefore, the sorting load applied to the coarse screen can be reduced. Further, if the sorting load applied to the rough sieve can be reduced, a large number of crops can be sorted without enlarging the rough sieve and hence the threshing device.
Further, in the present invention, it is preferable that the second grain pan is disposed at substantially the same height as the rough sieve.
According to this feature, since there is no step between the second grain pan and the coarse screen, the flow of the separation wind of the windmill is good. In addition, since the threshing processed object is roughly sorted by the drop-off sorting unit, the threshing processed object is not blocked even if a step is not provided between the second grain pan and the coarse screen.
Further, in the present invention, it is preferable that the coarse screen is inclined so that the conveyance end side rises when viewed from the side.
According to this characteristic configuration, the threshed object is guided to the conveyance starting end side along the inclination of the coarse screen, and thus easily falls off from the conveyance starting end side of the coarse screen. Therefore, since the grains can be recovered at the most possible transport start end side of the threshing device, the loss of the grains can be reduced. Further, since the threshed objects are roughly sorted by the underdrain sorting unit, the threshed objects do not get clogged even if the scalping unit is inclined so that the conveying end side rises.
[4] The solution corresponding to the problem [4] is as follows.
The invention is characterized in that it is equipped with: a first working section; a second working unit different from the first working unit; and a third working unit different from the first working unit and the second working unit, wherein an operation lever capable of instructing the first working unit to operate is provided in the vicinity of a driver's seat, the operating lever is provided with a grip portion having a first surface and a second surface, the first surface being positioned with a thumb of an operator, the second surface is different from the first surface, four fingers except the thumb are positioned on the second surface, the first surface is provided with a first instruction input mechanism, the first command input means is capable of instructing the second working unit to perform an opposite operation and inputting an opposite operation command by swinging a thumb along the first surface and around a base of the finger, and the second surface is provided with a second command input means, the second command input means can instruct the third working unit to perform an opposite operation, and can input an opposite operation command by a pressing operation of any one of four fingers other than the thumb.
According to this characteristic configuration, since the first command input means and the second command input means are disposed on different surfaces, erroneous operation of both means is reduced as compared with the case where both means are disposed on the same surface. Further, the first command input means is a means for inputting by swinging the thumb along the first surface around the base of the finger, and the second command input means is a means for inputting by pressing any one of four fingers other than the thumb, both means being capable of performing input operation by simple finger operation, and therefore, operability is excellent, and reliable operation input is possible even when the operation lever and the means are simultaneously operated.
Further, in the present invention, it is preferable that the first command input means is a seesaw switch.
According to this characteristic configuration, the first command input means is a seesaw switch (seesaw switch) capable of selecting different inputs, and therefore, the operation commands to the second working unit can be accurately input without simultaneously issuing the opposite operation commands. Further, because the two input portions are connected by a smooth surface due to the shape characteristics of the seesaw switch, the thumb is moved from one input portion to the other input portion only by swinging the thumb along the surface of the seesaw switch. In this way, according to the present characteristic configuration, an input operation error of the first command input means is prevented, and a smooth input operation of the first command input means can be realized.
Further, in the present invention, it is preferable that the second instruction input means is a seesaw switch.
In the above-described aspect, the second command input means is a seesaw switch capable of selecting different inputs, and therefore, for example, when the index finger is placed at one input portion and the middle finger is placed at another input portion, the input operation of the second command input means can be performed only by the pressing operation of one of the fingers without moving the entire hand. Further, the operation command for the third operation unit can be accurately input without simultaneously giving opposite operation commands by the two fingers. In this way, according to the present characteristic configuration, the input operation of the second instruction input means can be easily performed, and an input operation error of the second instruction input means can be prevented.
Further, in the present invention, it is preferable that an upper surface on which a palm of a hand of an operator is placed is formed on the grip portion, the upper surface being a surface different from the first surface and the second surface, the first command input means is formed on a side portion of the grip portion on a side closer to the operator, and the second command input means is formed on a side portion of the grip portion on a side farther from the operator.
According to this characteristic configuration, when the operation lever is held in a state where the palm of the hand is placed on the upper surface of the operation lever, the thumb is not in an extraordinary posture but in a natural posture so as to be positioned on the first surface and the other four fingers are positioned on the second surface.
Further, in the present invention, it is preferable that the second command input means is disposed in a state of being inclined downward as the distance from the operator increases.
According to this characteristic configuration, in the above-described type of the operation lever that is gripped from above, the second command input means is inclined so as to be located further downward from the operator, and therefore, the finger (little finger) that is further away from the body is bent more greatly. As a result, the finger side is strongly gripped, and the force is strongly applied to the hand and the finger, so that the second command input means can be accurately operated.
Further, in the present invention, it is preferable that the upper surface is inclined to be located downward as the distance from the operator increases.
According to this characteristic configuration, since the upper surface of the operating lever is inclined so as to be located downward as the operating lever is farther away from the operator, the hand holding the operating lever is in a state of being lowered outward. At this time, the forearm is naturally inclined along the hand so as not to be twisted. As a result, the elbow is close to the body, and the armpit is closed, and the shoulder is less likely to be burdened than when the armpit is open.
Further, in the present invention, it is preferable that the second instruction input means is disposed along a direction of the upper surface.
Generally, the index finger, middle finger, and ring finger, which can strongly exert the pressing force on four fingers other than the thumb, are used. In a state where the operation lever is gripped from above, the tips of the three fingers are located at substantially the same distance from the upper surface. According to this characteristic configuration, in a natural state, any two fingers of the index finger, the middle finger, and the ring finger are positioned at the second command input means, and the second command input means can be easily operated.
Further, in the present invention, it is preferable that the second surface is inclined so as to be located more rearward as being farther from the operator in a plan view.
According to the present characteristic configuration, since the posture of the hand is in the state of being opened outward with respect to the front-rear direction in plan view, the armpit is naturally in the closed state, and even if the arm is moved forward and backward in order to operate the operation lever forward and backward, it is not easy to apply a load to the shoulder, the elbow, and the like.
Further, in the present invention, it is preferable that the first surface is inclined so as to be located further forward from the operator in a plan view.
According to the present characteristic configuration, since the posture of the hand is in the state of being opened outward with respect to the front-rear direction in plan view, the armpit is naturally in the closed state, and even if the arm is moved forward and backward in order to operate the operation lever forward and backward, it is not easy to apply a load to the shoulder, the elbow, and the like.
Further, in the present invention, it is preferable that the first working unit is a transmission of a travel transmission, and the operating lever is a shift lever capable of instructing a shifting operation to the transmission.
According to this characteristic configuration, since the first command input mechanism and the second command input mechanism are disposed on the shift lever that is frequently used, the movement of the hand for the operation input of these mechanisms can be reduced.
Further, in the present invention, it is preferable that the shift lever is a main shift lever.
According to this characteristic configuration, since the first command input means and the second command input means are provided in the main shift lever which is generally held at all times, it is not necessary to intentionally move the hand for the operation input of these means.
Further, in the present invention, it is preferable that the second working unit or the third working unit is a cutting elevation control unit that elevates a cutting unit or a roll elevation control unit that elevates a raking roll provided in the cutting unit.
According to this characteristic configuration, the operation of raising and lowering the harvesting unit and the operation of raising and lowering the drum can be performed by the hand holding the operating lever while the first working unit is operated by the operating lever, and a combine having an excellent operation condition can be obtained.
Further, in the present invention, it is preferable that the second working unit is a cutting elevation control unit that elevates the cutting unit.
According to this characteristic configuration, the first working unit can be operated by the operating lever, and the cutting unit can be lifted and lowered by the hand holding the operating lever, so that the combine harvester can be operated in an excellent manner. Further, since the input operation is performed on the first command input means by the thumb located closer to the body side than the other four fingers, the third working section is a working section located further to the front side (away from the body side) than the cutting section.
Further, in the present invention, it is preferable that the second working unit is a harvesting elevation control unit that elevates a harvesting unit for harvesting a field crop.
According to this characteristic configuration, the lifting operation of the harvesting unit can be performed by the hand holding the operating lever while the first working unit is operated by the operating lever, and a combine harvester excellent in operation can be provided.
Further, in the present invention, it is preferable that the third operation unit is a roll lifting control unit that lifts and lowers the raking roll.
According to this characteristic configuration, the lifting operation of the raking reel can be performed by the hand holding the operating lever while the first working unit is operated by the operating lever, and the combine harvester having an excellent operation condition can be obtained. Further, since the second command input means is input by the other four fingers located farther from the body side than the thumb, the second working section is a working section located more rearward (closer to the body side) than the raking reel, and in this case, the mechanism capable of instructing the raising and lowering operation of the raking reel can be intuitively understood as the first command input means, and thus, the error with the first command input means is unlikely to occur.
Further, in the present invention, it is preferable that the third operation unit is a rotary shredder elevation control unit for raising and lowering a rotary shredder for crushing stalks left in a field after harvesting the crop.
According to this characteristic configuration, the first working unit can be operated by the operating lever, and the rotary shredder can be lifted and lowered by the hand holding the operating lever, so that the combine harvester can be operated in an excellent manner.
Further, in the present invention, it is preferable that a lever guide for guiding the operation lever is provided at a height position substantially equal to a seat surface of the driver's seat.
According to this characteristic configuration, the operating lever can be disposed at a height position at which the operator can easily operate the operating lever.
Further, in the present invention, it is preferable that the operation lever is provided on a right side of a driver's seat.
According to this characteristic configuration, for example, when traveling on the road in a country where right-hand traffic is regulated by law, the shift operation can be performed with the same feeling as that of a general automobile or the like (driver's seat: left side of the vehicle body, shift lever: right side of the driver's seat) in that country.
Further, in the present invention, it is preferable that the first working unit is a transmission device of a travel transmission including a front wheel and a rear wheel, and the travel transmission drives the front wheel and the rear wheel.
According to this characteristic, it is advantageous for travel on roads outside the field, compared to crawler-type combine harvesters.
Further, in the present invention, it is preferable that the rear wheels are steering wheels, and a steering wheel for steering the rear wheels is provided.
According to this characteristic configuration, since the rear wheels are steered wheels, the turning radius can be set smaller than in the case where the front wheels are steered wheels, and the combine can turn in a narrow place. Further, since the steering operation is performed on the rear wheels by the steering wheel, the amount of operation of the steering support member per unit turning amount can be set larger than that of a steering lever or the like, the turning amount can be finely indicated, and an intermittent turning operation can be performed.
Drawings
Fig. 1 is a schematic diagram illustrating a basic configuration of a crawler travel device according to a first embodiment of the present invention.
Fig. 2 is a side view showing the whole of a combine harvester equipped with one of specific embodiments of the crawler travel device according to the first embodiment of the present invention.
Fig. 3 is a side view of the crawler travel device.
Fig. 4 is a sectional view taken along line IV-IV of fig. 3.
Fig. 5 is a sectional view taken along line V-V of fig. 3.
Fig. 6 is a sectional view taken along line VI-VI of fig. 3.
Fig. 7 is a plan view showing the advancing/retreating mechanism for supporting the tension sprocket.
Fig. 8 is a perspective view showing a mounting structure of the crawler guide.
Fig. 9 is a side view of a conventional combine harvester according to a second embodiment of the present invention.
Fig. 10 is a plan view showing a general type combine.
Fig. 11 is a side sectional view showing the dust suction fan and the catching member.
Fig. 12 is a front sectional view showing the dust suction fan and the catching member.
Fig. 13 is a top sectional view showing the dust suction fan and the catcher member.
Fig. 14 is an exploded perspective view showing the dust suction fan and the catching member.
Fig. 15 is an exploded perspective view showing a dust suction fan and a catch member according to another embodiment of the second embodiment of the present invention.
Fig. 16 is a side cross-sectional view showing a threshing device according to a third embodiment of the present invention.
Fig. 17 is a side sectional view showing the front side of the sorting section.
Fig. 18 is a front sectional view showing a front part of the sorting section.
Fig. 19 is a side cross-sectional view showing a left side portion on the front side of the sorting section.
Fig. 20 is a side cross-sectional view of the right side portion showing the front side of the sorting section.
Fig. 21 is a diagram showing a power transmission path of the power transmission shaft.
Fig. 22 is a plan view showing a first screen line and a second screen line.
Fig. 23 is a perspective sectional view showing a first screen line and a second screen line.
Fig. 24 is a side sectional view showing the rear side of the sorting section.
Figure 25 is a top view showing the first, second and third straw walker.
Figure 26 is a perspective cross-sectional view showing the first, second and third straw walker.
Fig. 27 is a side view showing the whole of a combine harvester according to a fourth embodiment of the present invention.
Fig. 28 is a plan view showing the driver's part.
Fig. 29 is a front view showing the driver's part.
Fig. 30 is a plan view showing the periphery of the main shift lever.
Fig. 31 is a partial cross-sectional view in elevation showing the main shift lever periphery when the main shift lever is in the work progress area.
Fig. 32 is a perspective view showing the driver's part.
FIG. 33 is a cross-sectional view of XXXIII-XXXIII in FIG. 31.
Fig. 34 is a side view showing the whole of a corn harvester according to another embodiment of the fourth embodiment of the present invention.
Detailed Description
[ first embodiment ]
The first embodiment of the present invention will be explained below.
Before a description of a specific embodiment of a harvester according to a first embodiment of the present invention, a basic configuration having features of the present invention will be described with reference to fig. 1.
The crawler travel device 1 includes a crawler frame 20 supported by a body frame 3 of a work vehicle such as a combine harvester and a backhoe. The track frames 20 extend in a pair in the front-rear direction of the machine body, and the track frame 20 on the left side in the forward direction is illustrated in fig. 1. A drive sprocket 21 is disposed at the front portion of the track frame 20, and a tension sprocket 22 is disposed at the rear portion of the track frame 20. A crawler belt 26 is wound around the crossover drive sprocket 21 and the tension sprocket 22. A plurality of rollers 23 for guiding the crawler belt 26 in the ground direction are disposed below the track frame 20.
The roller 23 is a structure in which a pair of left and right roller half bodies 23a are connected by a roller shaft 8. The lower surface of the track frame 20 is provided with a mounting member 6 having a female screw 6a, and the female screw 6a is used for mounting the roller 23. The roller 23 is attached to the attachment member 6 via the attachment unit 60 by the fixing bolt 90, and as a result, is detachably attached to the track frame 20. Since the female screw 6a needs to have a sufficient length to reinforce the screw fastening by the fixing bolt 90, the mounting member 6 is formed of a thick-walled member, and the mounting member 6 also functions as a reinforcing plate of a frame body (usually, a steel material such as an angular pipe) constituting the track frame 20. In addition, from the viewpoint of weight reduction, it is preferable that the mounting member 6 is not a single long member but is intermittently disposed so as to be divided into a plurality of mounting member pieces.
Since the plurality of rollers 23 are mounted on one mounting unit 60, the plurality of rollers 23 are also removed by removing the mounting unit 60 from the mounting member 6. The attachment unit 60 is composed of a boss member 60B that pivotally supports the roller shaft 8, and a groove member 60A that fixes the boss member 60B. The boss member 60B is a cylindrical body, and bearings are mounted on inner wall surfaces at both ends thereof to axially support the roller shaft 8 penetrating the boss member 60B. The roller half bodies 23a are fixed to respective protruding portions of the roller shaft 8 protruding from both ends of the boss member 60B.
The groove-shaped member 60A is a long member having a recess formed therein and opening downward, and has a substantially inverted U-shaped, gate-shaped, or arch-shaped cross section. At least a part of the upper surface portion of the groove-shaped member 60A is formed as a horizontal surface and is in surface contact with a contact surface formed at the lower portion of the mounting member 6. The boss members 60B are preferably joined by welding at predetermined intervals in the front-rear direction of the machine body so as to span side surface portions that hang down from the left and right ends of the upper surface portion of the channel-shaped member 60A. In order to secure the welding length between the groove-shaped member 60A and the boss member 60B, an arc-shaped receiving surface for holding the boss member 60B is formed on the side surface thereof, or an auxiliary flange plate functioning as a connection relay material is provided.
Through holes for passing the fixing bolts 90 are provided in the upper surface portion of the groove member 60A at intervals not overlapping the boss member 60B. The through hole corresponds to the position of the female screw 6a of the mounting member 6. Thus, when the mounting unit 60 is detachably fixed to the mounting member 6, the fixing bolt 90 inserted through the through-hole from the lower opening of the groove formed in the groove-shaped member 60A is screwed to the female screw 6a of the mounting member 6.
Next, one of specific embodiments of the crawler travel device 1 according to the present invention will be described with reference to the drawings. The crawler travel device 1 is equipped to a combine harvester. Fig. 2 is a side view of the combine.
As shown in fig. 2, the combine harvester is a general-type combine harvester, and has a pair of left and right crawler traveling devices 1 below a body frame 3 extending in a front-rear direction as a traveling direction, and the pair of left and right crawler traveling devices 1 are driven by a driving force from an engine (not shown) provided below a driver seat 11 to automatically travel. A harvesting part 10 is connected to the front part of the machine frame 3, and a threshing device 12 and a grain box 13 are provided at the rear part of the machine frame 3. The cutting unit 10 is swingably lifted and lowered between a lowered working position and a raised non-working position by a hydraulic cylinder 15. The combine harvester performs harvesting work of rice, wheat, and the like by moving the traveling body with the harvesting unit 10 positioned at the lowered working position.
The harvesting unit 10 includes a rotary drum 10a for raking the ear tip side of the crop to be harvested rearward, a clipper-type harvesting device 10b for cutting the root of the crop, and a feeder 12a for feeding the straw rearward of the machine body to the threshing device 12. The grain tank 13 recovers and stores the threshed grains sent from the threshing device 12. The stored threshed grain is transported to the outside by an auger 14.
Fig. 3 is a side view showing the entire crawler 1 on the left side. Fig. 4 is a sectional view taken along line IV-IV in fig. 3. As shown in fig. 3 and 4, the crawler travel device 1 includes a track frame 20 extending in the front-rear direction as a base. The track frame 20 is supported by the machine frame 3 so as to be suspended from the machine frame 3 via the front bracket 16a and the rear bracket 16 b. The track frame 20 is an angular tube having a quadrangular cross section.
A drive sprocket 21 supported by the transmission case 17 is attached to a front portion of the track frame 20 via an attachment member 16c connected to the front bracket 16a, the track frame 20, and the machine body frame 3. A tension sprocket 22 is attached to a rear end portion of the track frame 20 via an advancing/retreating mechanism 30 supported by the track frame 20. A rubber crawler belt 26 is wound around the drive sprocket 21 and the tension sprocket 22. Between the drive sprocket 21 and the tension sprocket 22, 6 rollers 23 are disposed below the track frame 20, and the rollers 23 guide the belt edge of the crawler belt 26 returning to the ground contact side. The drive sprocket 21 and the tension sprocket 22 mesh with teeth formed in valleys 26c formed between a pair of left and right core member projections 26a, and the core member projections 26a are provided on a core member buried in a plurality of portions in the longitudinal direction of the crawler belt 26. The roller 23 presses the crawler belt 26 into the ground so as to straddle the pair of right and left core member projections 26 a.
The plurality of rollers 23 are supported by the track frame 20 via a mounting unit 60 divided into a front side and a rear side. The mounting member 6 is welded and fixed to a mounting portion of the lower surface of the track frame 20 to the mounting unit 60 for bolt fixing between the mounting unit 60 and the track frame 20. The mounting member 6 has a thickness several times as large as the thickness of the track frame of each pipe, and also functions as a reinforcing plate of the track frame 20. The mounting member 6 is provided with a through hole in which a female screw 6a for bolt fastening is formed. Further, an opening 20a for avoiding a bolt tip portion protruding from the mounting member 6 is also provided on the lower surface of the track frame 20 at the time of bolt fixing.
In this embodiment, the 6 rollers 23 are divided into two front and rear groups of 3 rollers 23, and each group is attached to the attachment unit 60 divided into the front side and the rear side. The two mounting units 60 are bolted to the track frame 20 as described above. The front mounting unit 60 and the rear mounting unit 60 are not completely the same shape, but have no substantial difference, and therefore, they are collectively described here.
The mounting unit 60 is constituted by a channel member 60A and a boss member 60B welded to the channel member 60A. The channel member 60A is a long member composed of a bottom plate portion 62 and left and right side plate portions 61, both of which are plate materials. The left and right side plate portions 61 are connected to the bottom plate portion 62 at right angles from the left and right ends of the bottom plate portion 62, respectively, and an internal space having a rectangular cross section that opens downward is formed between the bottom plate portion 62 and the left and right side plate portions 61. The channel member 60A may be a channel in which the bottom plate 62 and the side plate 61 are integrated. The boss member 60B is a cylindrical body having a substantially constant outer diameter, and has an axial length longer than the interval between the left and right side plate portions 61. As a result, the boss member 60B has a portion protruding outward from the side plate portion 61. The side plate portion 61 is provided with a semicircular cutout in accordance with the mounting pitch of the roller 23, and the side plate portion 61 and the boss member 60B are welded in a state where the outer peripheral surface of the boss member 60B is fitted into the cutout.
The roller 23 is composed of a roller shaft 8 and a pair of left and right roller half bodies 23a bolted to both ends of the roller shaft 8. Ball bearings 80 for supporting the roller shaft 8 are disposed on the inner wall surfaces of the end regions of the boss member 60B, and the roller shaft 8 is rotatably supported. A seal member 81 is attached to the outer side of each ball bearing 80. The roller shaft 8 is longer than the boss member 60B, and roller half bodies 23a are fixed to the projecting portions of the roller shaft 8 projecting from both ends of the boss member 60B, respectively. The roller shaft 8 is provided with a grease injection hole 8a, and grease injected from the grease injection hole provided at the end of the roller shaft 8 is filled into a space formed between the inner wall surface of the boss member 60B and the pair of right and left ball bearings 80 through the grease injection hole 8 a. Further, a relief mechanism is formed to release the excess pressure when the grease pressure in the space rises. The bleed mechanism is a plug 82 screwed into a through screw hole provided in the peripheral wall of the boss member 60B, and an axial through hole 82a is formed in the plug 82 as a bleed hole.
As described above, since the 3 rollers 23 are integrated with the mounting unit 60, the 3 rollers 23 are fixed to the track frame 20 by fixing the mounting unit 60 to the track frame 20. In order to fix the attachment unit 60 to the track frame 20, the fixing bolt 90 is inserted into the through hole 62a provided in the bottom plate 62 from between the left and right side plates 61, and is screwed into the through hole of the attachment member 6 formed with the female screw 6 a. Between the bolt head of the fixing bolt 90 and the bottom plate 62 of the groove-shaped member 60A, a shim plate 91 is interposed in addition to the washer and the spring washer. The shim plate 91 may be provided for each fixing bolt 90, but may also be a strip plate common to a plurality of fixing bolts 90. The pad plate 91 is fixed to the track frame 20 by welding or the like. Further, as is clear from fig. 3, the two mounting members 6 are disposed with a gap in the front-rear direction for each mounting unit 60. Each mounting member 6 is provided with two through holes in which female screws 6a that engage with the fixing bolts 90 are formed, and the two through holes sandwich the roller 23 in a side view. Since the lower portion of the fixing bolt 90 is open, the bolt fixing work is easy. Further, the left and right sides of any of the fixing bolts 90 are covered with the side plate portions 61, and the possibility of directly receiving mud and foreign matter is low.
As shown in fig. 5, the guide wheel 25 for guiding the upper return belt edge of the crawler belt 26 has substantially the same configuration as the roller 23, and is composed of a roller shaft 8 and a pair of left and right guide wheel half bodies 25a bolted to both ends of the roller shaft 8. The guide-wheel mounting unit 63 that mounts the guide wheels 25 to the track frame 20 is also similar to the mounting unit 60 of the roller 23. The guide wheel attachment unit 63 is composed of a bracket 63A and a boss member 63B, and the boss member 63B is the same as the boss member 60B of the attachment unit 60. The bracket 63A is formed of a pair of left and right bracket plates, one end of which is welded to the boss member 63B, and the other end of which is welded to the upper surface of the track frame 20. Of course, the guide wheel attachment unit 63 may be configured to be bolted to the track frame 20 in the same manner as the attachment unit 60 of the roller 23. The bracket 63A may be connected to a rear bracket 16b, and the rear bracket 16b may connect the track frame 20 to the body frame 3.
As shown in fig. 6 and 7, the tension sprocket 22 is assembled to an advancing/retreating mechanism 30 provided at a rear end portion of the track frame 20, and is movable and adjustable in the front-rear direction with respect to the track frame 20. The tension sprocket 22 is rotatably supported by the tension shaft 22b via a ball bearing provided on the boss portion thereof. The sprocket portion 22a of the tension sprocket 22 has a cross-sectional shape in which a quadrangle is added to the trapezoid, instead of the trapezoid cross-section, and the strength is improved by adding the quadrangle cross-section. As a result, the tension sprocket 22 has a larger diameter than the conventional one.
The advancing-retreating mechanism 30 includes a holding unit 31, a support rod 32, and an adjustment screw mechanism 33. The holding unit 31 includes a plate-shaped base 31b and a pair of left and right side plates 31a erected on the rear surface of the base 31 b. The tension shaft 22b that rotatably supports the tension sprocket 22 is supported by a pair of left and right side plates 31 a. A support rod 32 extending in the front-rear direction of the machine body is connected to the front surface of the base 31 b. The support rod 32 has a quadrangular outer cross section that coincides with or substantially coincides with a quadrangular inner cross section of the track frame 20, and is inserted into the track frame 20 so as to be slidable in the front-rear direction of the machine body while being guided by the inner surface of the track frame 20.
The adjusting screw mechanism 33 has a pair of left and right sides with respect to the track frame 20. Each of the adjustment screw mechanisms 33 has an adjustment screw body 33a as a threaded rod, a first screw body receiving portion 33b, and a second screw body receiving portion 33 c. The first screw receiving portion 33b is fixed to the base 31b of the holding unit 31, and the second screw receiving portion 33c is fixed to the bracket 27 coupled to the track frame 20. The first and second screw receiving portions 33b and 33c hold the adjusting screw 33a so that the adjusting screw 33a is parallel to the support rod 32. The first screw receiving portion 33b has a through screw hole screwed with the screw portion of the adjustment screw 33 a. The second screw receiving portion 33c has an engagement hole that is penetrated by the main body portion of the adjustment screw 33a and prohibits relative axial movement with the adjustment screw 33 a. That is, the adjusting screw mechanism 33 is a screw-type reciprocating mechanism using the first screw receiving portion 33b as a stopper member. Therefore, the tension sprocket 22 is advanced while being guided by the support rod 32 and the track frame 20 by rotating the adjustment screw body 33a in one direction, and the tension sprocket 22 is retracted by rotating the adjustment screw body 33a in the other direction. The tension of the track 26 is optimized by adjusting the movement of the tension sprocket 22 relative to the track frame 20 in the fore-and-aft direction of the machine body, thereby fixing the tension sprocket 22 at its optimum position.
As can be understood from fig. 4 and 7, the tip end of the fixing bolt 90 near the tension sprocket 22 of the fixing bolts 90 that fix the mounting unit 60 to the track frame 20 interferes with the support rod 32 when entering the inside of the track frame 20. Therefore, the length of the fixing bolt 90 that may interfere with the support rod 32 and the length of the mounting member 6 into which the fixing bolt 90 is inserted are set such that the tip end of the fixing bolt 90 does not reach the inside of the track frame 20 even if the fixing bolt 90 is fastened to the maximum extent.
As shown in fig. 4, 5, and 6, a pair of left and right roller half bodies 23a of the 6 rollers 23 are positioned on both lateral outer sides of a pair of left and right core member projections 26a of the crawler belt 26, respectively, and are supported to act on the inner peripheral surface of the crawler belt 26. As shown in fig. 3 and 8, the track guides 28, which press-fit the trough portions 26c formed between the pair of left and right core member projections 26a, are fixed by bolts to the side plate portions 61 of the channel members 60A of the attachment unit 40.
The crawler guide 28 includes a ski-like guide body 28a and a mounting portion 28b protruding from the upper surface of the guide body 28a, and the guide body 28a and the mounting portion 28b are integrally formed by casting. The guide body 28a has a width corresponding to the trough 26c of the crawler belt 26, and the mounting portion 28b has a width corresponding to the distance between the left and right side plates 61 of the channel member 60A. The side plate portion 61 and the mounting portion 28b are provided with common through holes 61a and 28c at intermediate positions between the adjacent roller shafts 8, and the track guide 28 and the mounting unit 40 are bolted by the through holes 61a and 28 c.
[ other embodiments of the first embodiment ]
(1) In the first embodiment described above, 3 rollers 23 are provided as one set in 1 mounting unit 60, but the number of rollers 23 provided in 1 mounting unit may be two, or 4 or more.
(2) In the first embodiment described above, all the rollers 23 are the same in shape, but different shapes of the rollers 23 may be combined.
(3) In the first embodiment described above, the guide main body portion 28a and the mounting portion 28b are integrally formed with the crawler guide 28, but the guide main body portion 28a and the mounting portion 28b may be formed separately and then connected by welding or the like.
(4) In the first embodiment described above, the track frame 20 is a rectangular or square pipe, but may be another polygonal or circular pipe. At this time, the support rod 32 embedded in the track frame 20 also has an appropriate cross section corresponding to the inside cross section of the track frame 20.
(5) In the first embodiment described above, the mounting member 6 is formed of a common long plate material for the plurality of fixing screws 90, but may be a short plate material formed with only one female screw 6a for one fixing bolt 90.
(6) Although the track frame 20 is fixed to the machine body 3 in the first embodiment described above, the track frame 20 may be supported by the machine body frame 3 so as to be vertically movable via a pair of front and rear support arms that are swingably movable.
[ second embodiment ]
A second embodiment of the present invention will be explained below.
First, the overall configuration of a general-type combine harvester according to a second embodiment of the present invention will be described with reference to fig. 9 to 11.
As shown in fig. 9 and 10, a conventional combine harvester has a crawler-type traveling body 101. A driving unit 102 is provided in a front portion of the traveling machine body 101. A threshing device 103 and a grain tank 104 are provided behind the cab 102 in parallel in the left-right direction. Further, a cutting section 105 is provided in front of the traveling machine body 101. A feeder 106 for feeding the harvested straw to the threshing device 103 is provided at the rear of the harvesting portion 105.
As shown in fig. 11, the feeder 106 delivers harvested straw in a feeder box 107. A front rotary member 108 is rotatably supported at the front end of the feeder box 107. A rear rotary body 109 is rotatably supported at the rear end of the feeder tank 107. A pair of right and left conveyor chains 110 are wound around the front rotary body 108 and the rear rotary body 109. A conveying plate 111 is provided in the pair of left and right conveying chains 110. The pair of left and right transport chains 110 are rotated forward in the direction of arrow a1 by a forward rotation mechanism not shown, and rotated backward in the direction opposite to arrow a1 by a reverse rotation mechanism not shown.
Further, a dust suction port 170a is formed in the ceiling plate 170 of the feeder tank 107. A dust suction fan 112 for sucking dust in the feeder tank 107 from the dust suction port 170a and discharging the dust to the outside is provided above the dust suction port 170 a. The catching member 120, which will be described in detail later, is attached to the dust suction port 170 a.
Next, the dust suction fan 112 will be described with reference to fig. 12 to 14.
As shown in fig. 12 to 14, the dust suction fan 112 rotates about a left-right axis X1. The dust suction fan 112 is driven by a motor 113. The dust suction fan 112 is covered by the fan housing. The dust suction fan 112 is disposed near the left lateral end of the top plate 170 of the feeder tank 107. The lower end portion of the rotation locus in the dust suction fan 112 is located at the periphery of (or in the vicinity of) the dust suction port 170 a. The edge of the dust suction fan 112 on the downstream side in the dust flow direction is substantially flush with the outer surface of the lateral plate portion 171 of the feeder case 107.
The lower end of the suction-side casing 116 is coupled to a stud 124 (corresponding to a "projecting portion" of the present invention) projecting upward from the top portion 170 via a knob nut 125 (corresponding to a "fastener" of the present invention). A plurality of (e.g., four) studs 124 project upward from the top plate 170. Four bolt holes 116a through which the studs 124 are inserted are formed in the lower end of the suction side casing 116. The lower end of the suction-side casing 116 is pressed from above by a pressing frame (corresponding to a "pressing member" of the present invention). In addition, a recessed portion 116b recessed toward the dust collection fan 112 side is formed in a portion of the suction side case 116 that faces the dust collection fan 112.
The recessed portion 116b is formed in a portion of the suction-side housing 116 that is opposed to the dust suction fan 112 in the direction of the shaft center X1. The concave direction of the concave portion 116b is the body lateral outward direction (left lateral outward direction).
The motor 113 is disposed on the upstream side in the dust flow direction with respect to the dust suction fan 112. That is, the motor 113 receives power from the upstream side in the dust flow direction with respect to the dust suction fan 112. The motor 113 is disposed between the dust suction port 170a and the dust suction fan 112. The motor 113 is divided from a dust flow path through which dust flows. Specifically, the motor 113 is covered with the cover 119 in a section where the recess portion 116b faces the dust suction fan 112. The motor 113 is supported so as to penetrate the recessed portion 116b (bottom portion of the recessed portion 116 b).
The pressing frame 126 has four bolt holes 126a through which the studs 124 are inserted. The pressing frame 126 is fastened to the stud 124 together with the lower end of the suction-side casing 16 by a knob nut 125. That is, the pressing frame 126 is fastened and coupled to the stud 124 together with the suction-side housing 116 and the catching member 120 by the knob nut 125. Further, a breaker 114 for the motor 113 is attached to the pressing frame 126 via an attachment stay 127. That is, the circuit breaker 114 for the motor 113 is equipped adjacent to the dust suction fan 112.
Next, the trap member 120 will be described with reference to fig. 12 to 14.
As shown in fig. 12 to 14, the catching part 120 catches the straw flowing toward the dust suction fan 112. The catching member 120 is supported by the ceiling plate 170 of the feeder box 107 and the lower end of the suction side housing 116. The catching member 120 is configured to be attachable to and detachable from the feeder tank 107. Specifically, the catching member 120 is fastened and coupled to the stud 124 together with the lower end of the suction-side housing 116 by a knob nut 125. The catching member 120 includes a plurality of (three in the present embodiment) round rods 121 (corresponding to the "rod-shaped member" in the present invention) and a pair of front and rear support frames 122 and 123.
The round bars 121 are arranged so as not to intersect with each other across the dust suction port 170 a. Specifically, the round bar 121 is disposed substantially parallel to the conveying direction (front-rear direction) of the feeder 106. The three round bars 121 are arranged at predetermined intervals (for example, equal intervals) from each other. The gaps between the mutually adjacent round bars 121 of the three round bars 121 are formed over the entire length (front-rear direction) of the dust suction port 170 a. The round bar 121 is disposed only on the left side (laterally outward) of the width B of the dust suction port 170a in the lateral direction. The round bar 121 is disposed so as not to protrude upward from the upper surface of the top plate 170 of the feeder tank 107. That is, the round bar 121 is disposed on the lower surfaces of the front and rear pair of support frames 122 and 123.
A pair of front and rear support frames 122 and 123 are disposed on the upper surface of the top plate 170 of the feeder tank 107. The front support frame 122 of the pair of front and rear support frames 122 and 123 is disposed along the front side edge of the dust suction port 170 a. A bolt hole 122b through which a stud 124 is inserted is formed in the left end portion of the front support frame 122. A front fixing portion 122a is formed on the front support frame 122. The front fixing portion 122a protrudes from the front edge of the dust suction port 170a toward the center of the dust suction port 170 a. The tip end of the round bar 121 is fixed (e.g., welded) to the lower surface of the front fixing portion 122 a.
The rear support frame 123 of the pair of front and rear support frames 122 and 123 is disposed along the rear side edge of the dust suction port 170 a. A bolt hole 123b through which the stud 124 is inserted is formed in the left end portion of the rear support frame 123. The support frame 123 on the rear side is formed with a rear fixing portion 123a to which the rear end portion of the round bar 121 is fixed. The rear fixing portion 123a protrudes from the rear edge of the dust suction port 170a toward the center side of the dust suction port 170 a. The rear end of the round bar 121 is fixed (e.g., welded) to the lower surface of the rear fixing portion 123a of the rear support frame 123.
With the above configuration, in the catching member 120, the three round bars 121 are arranged so as not to cross each other across the dust suction port 170 a. That is, in the catching member 120, the gap between the round bars 121 adjacent to each other among the three round bars 121 is formed across the entire length (front-rear direction) of the dust suction port 170 a. Accordingly, the straw flowing toward the dust suction fan 112 is caught by the three round bars 121, while entanglement of the straw is less likely to occur between the round bars 121 adjacent to each other among the three round bars 121.
[ other embodiments of the second embodiment ]
Hereinafter, another embodiment of the second embodiment of the present invention will be described.
(1) In the second embodiment, the pair of front and rear support frames 122 and 123 are provided on the catcher member 120, but as shown in fig. 15, for example, one end of the front support frame 122 and one end of the rear support frame 123 may be connected by a support frame. In this case, bolt holes are formed in the connecting portion between the one end portion of the front support frame 122 and the support frame and the connecting portion between the one end portion of the rear support frame 123 and the support frame. Although not shown in the drawings, one end of the front support frame 122 and one end of the rear support frame 123 may be connected by a support frame, and the other end of the front support frame 122 and the other end of the rear support frame 123 may be connected by a support frame.
(2) In the second embodiment, the round bar 121 is disposed substantially parallel to the conveying direction of the feeder 106, but the round bar 121 may be disposed substantially perpendicular to the conveying direction of the feeder 106. The round bar 121 may be disposed obliquely to the conveying direction of the feeder 106.
(3) In the second embodiment, the "rod-like member" of the present invention is the round rod 121, but the "rod-like member" of the present invention may be a square rod (for example, a square rod having a quadrangular cross section).
(4) In the second embodiment, the number of round bars 121 is three, but two round bars 121 may be used, or four or more round bars may be used.
(5) In the second embodiment, the number of the studs 124 is four, but the number of the studs 124 may be five or more.
(6) In the second embodiment described above, the "fastener" of the present invention is the knob nut 125, but the "fastener" of the present invention may be a wing nut.
(7) In the second embodiment, the suction-side casing 116 and the discharge-side casing 117 are detachably coupled by the bolt 118, but the bolt 118 may be a knob bolt.
[ third embodiment ]
A third embodiment of the present invention will be explained below.
First, the overall configuration of the threshing device will be described with reference to fig. 16. In the following description, in the threshing device, the conveying direction of the threshing processed object is defined as the front-rear direction, the conveying start end side direction is defined as the front, and the conveying end side direction is defined as the rear.
As shown in fig. 16, the threshing device threshes and sorts the straw. The threshing device also includes a threshing unit 201 and a sorting unit 202. Incidentally, in the present embodiment, the threshing device is a device provided in a general-type combine harvester, but may be a device provided in a half-feed type combine harvester.
The threshing part 201 threshes the straw. The threshing part 201 has a threshing cylinder 203 for threshing straw. The threshing cylinder 203 is rotatably supported by the threshing chamber 204 via a rotation shaft 203a in the front-rear direction. The threshing unit 201 also has a receiving net 205 through which the threshed objects in the threshing cylinder 203 are dropped.
The sorting unit 202 sorts the threshed objects (the threshed objects that have leaked from the receiving net 205). The sorting unit 202 includes a swing sorting device 206, a wind turbine 207, a first-type collecting unit 208, and a second-type collecting unit 209. The windmill 207 will be described in detail later.
The swing sorting device 206 performs swing sorting of the threshed processed products (the threshed processed products that have leaked from the receiving net 205). The oscillating separator 206 includes a screen box 210, a first grain tray 211, a first screen 212, a second screen 213, a second grain tray 214, a coarse screen 215, a first straw walker 216, a second straw walker 217, a third straw walker 218, and a grain screen 219. In addition, the first screen 212, the second screen 213, the first straw walker 216, the second straw walker 217 and the third straw walker 218 are explained in detail later.
The sieve box 210 is configured to be capable of swinging. That is, the sieve box 210 is swung in the forward and backward direction by the swing mechanism 220 of the eccentric cam type. The screen box 210 is provided with a first grain pan 211, a first screen wire 212, a second screen wire 213, a second grain pan 214, a coarse screen 215, a first straw walker 216, a second straw walker 217, a third straw walker 218, and a grain screen 219. Thus, the first grain pan 211, the first screen line 212, the second screen line 213, the second grain pan 214, the coarse screen 215, the first straw walker 216, the second straw walker 217, the third straw walker 218 and the grain screen 219 oscillate in a back-and-forth direction together with the screen box 210.
The first grain pan 211 performs specific gravity difference sorting of the threshed products. That is, the first grain pan 211 swings back and forth together with the screen box 210, and conveys the threshed objects backward, thereby vertically layering the threshed objects into straw chips having a low specific gravity and grains having a high specific gravity. The first kernel pan 211 is formed in a substantially wave shape in a side view. A first sifting line 212 is fixed to a wavy portion located on the rearmost end side among the wavy portions in the first kernel tray 211. The first grain tray 211 is provided on the front end side of the sieve box 210 (only the front end portion of the sieve box 210). That is, the first grain tray 211 is formed shorter than the first grain tray 214 in side view.
The coarse screen 215 performs undersize sorting on the threshed processed matter. That is, the coarse screen 215 has a plurality of angularly adjustable coarse screen plates 215a arranged at predetermined intervals in the front-rear direction. The coarse screen 215 swings back and forth together with the screen box 210, so that the rice straw chips and the like that have not leaked are conveyed backward while the grains and the like are leaked from between the rough-sizing plates 215 a. The angle of the rough-sizing plate 215a is adjusted by an angle adjusting unit, not shown.
The coarse screen 215 is inclined so that the rear end side rises in a side view. Also, a coarse screen 215 is provided behind the second grain pan 214. That is, the coarse screen 215 is disposed below the first screen line 212 and the second screen line 213. In other words, the coarse screen 215 is provided behind the windmill 207 in the screen box 210.
The second grain pan 214 performs specific gravity difference sorting of the threshed products. That is, the second grain pan 214 swings in the front-rear direction together with the sieve box 210, and the threshed products are separated into straw chips having a low specific gravity and grains having a high specific gravity while being conveyed rearward. The second grain pan 214 is formed into a substantially wave shape in a side view. A wavy portion 214a deeper than other wavy portions in the second grain tray 214 is formed on the tip side of the second grain tray 214. That is, the wavy portion 214a is formed at the leading end (the foremost end) of the second grain tray 214.
In addition, a second grain tray 214 is disposed below the first grain tray 211. That is, a first grain tray 211 different from the second grain tray 214 is provided above the second grain tray 214. The second grain pan 214 and the coarse screen 215 are disposed at substantially the same height. The rear end of the second grain pan 214 overlaps the front end of the scalping screen 215 (the scalping plate 215a located at the most front end side) in a plan view.
The grain sieve 219 sifts the threshed product. That is, the grain sieve 219 feeds back the grain with branches and the like that has not been dropped as the second type material together with the straw chips and the like while dropping the single-grain grains as the first type material. The grain sieve 219 is provided behind the wind turbine 207 and below the coarse sieve 215. A protrusion 219a protruding upward is provided on the front end side of the grain sieve 219. For example, the convex part 219a is formed of a plate-like member bent so as to protrude upward (substantially mountain-shaped).
The first type recovery part 208 recovers the granulated grains as a first type, and the first type recovery part 208 is disposed below the front portion of the screen box 210.
The second type collecting unit 209 collects branched grains and the like as a second type material, and the second type collecting unit 209 is provided below the rear portion of the sieve box 210.
Next, the wind turbine 207 will be described with reference to fig. 17 to 21.
As shown in fig. 17 to 20, wind turbine 207 includes blade member 221, fan casing 222, first air passage 223, and second air passage 224.
The blade member 221 is rotatably supported by the fan casing 222 via a rotation shaft 221a in the left-right direction. That is, the blade member 221 is configured to be rotatable about the axial center X2 in the left-right direction. The rotation direction of the blade member 221 is counterclockwise in side view (the rotation direction a2 shown in fig. 2). The blade member 221 is formed in a substantially arc shape that is concave toward the upper hand side in the rotational direction (the side opposite to the rotational direction a 2) in a side view. That is, the blade member 221 is formed in a substantially arcuate shape bulging toward the hand side in the rotational direction (the side opposite to the rotational direction a 2) in side view. In the present embodiment, the plurality of (e.g., four) blade members 221 are arranged at equal angular intervals (e.g., 90 degrees) around the axial center X2 in the left-right direction in a side view. The blade member 221 is fixed to the rotating shaft 221a via a plurality of (e.g., two) flange portions 221b formed in a substantially circular shape in side view.
The fan case 222 is configured to cover the blade member 221. Suction ports 222a for sucking outside air are provided on both right and left sides of the fan case 222.
The suction port 222a is covered with an adjustment plate 225 whose opening degree can be adjusted. The left-side adjustment plate 225 and the right-side adjustment plate 225 are connected by a single link rod 226. That is, the left and right adjustment plates 225 are configured to be swingable about the link rod 226 as a swing fulcrum. The left-side adjustment plate 225 is provided with a swing operation portion 227 for swinging the left-side adjustment plate 225 and the right-side adjustment plate 225.
The sort air supplied to the lower portion of the screen box 210 flows through the first air passage 223. The first air passage 223 is disposed below the wind turbine 207 and below the screen box 210. That is, the first air passage 223 communicates with the lower portion of the rear end side of the fan casing 222. Further, a guide plate 233 for guiding the sorted air in the first air passage 223 to the rear upper side is provided below the front side of the coarse screen 215.
The guide plate 233 is inclined so that the rear end side rises in side view. The inclination angle α 1 of the guide plate 233 substantially matches the center angle α 2 in the angle adjustment range β of the most distal one of the plurality of rough plates 215a (hereinafter referred to as "most distal one"). That is, the inclination angle α 1 of the guide plate 233 is substantially the same angle as the center angle α 2 in the angle adjustment range β of the roughing plate 215a on the most front side. Further, it is preferable that the inclination angle α 1 of the guide plate 233 completely coincides with (is the same angle as) the center angle α 2 in the angle adjustment range β of the roughing plate 215a on the most front side.
The sort air supplied to the upper portion of screen box 210 flows through second air passage 224. Second air passage 224 is disposed above wind turbine 207 and in front of screen box 210. That is, second air passage 224 communicates with the upper portion of fan casing 222 on the front end side. The second air passage 224 extends forward and then turns U-shaped rearward, and supplies the sort air to the front end side of the screen box 210. The upper portion of the second air passage 224 is formed by an upward inclined air passage 224a inclined so that the rear end side rises. Further, a third duct 232 through which the sorted air from the second duct 224 flows is formed in the sieve box 210, and the third duct 232 will be described in detail later.
Further, a power transmission shaft 231 (see fig. 21) to which power from the engine E is transmitted is disposed above the second air passage 224. That is, the power transmission shaft 231 is disposed at the upper portion of the front end side of the upward inclined air passage 224a of the second air passage 224. The power of the power transmission shaft 231 is transmitted to the threshing cylinder 203, the wind turbine 207, and the like.
The inlet of the third air passage 232 (downward inclined air passage 232 a) is provided across the front-end-side vertical wall (front wall) and the front-end-side lower wall of the screen box 210. The inlet of the third air passage 232 (downward inclined air passage 232 a) may be provided only on the front-end-side vertical wall (front wall) of the screen box 210, or may be provided only on the front-end-side lower wall of the screen box 210.
Further, an outlet portion of the third air passage 232 (upward inclined air passage 232 b) is disposed below the rear end side of the first grain tray 211. Further, a second grain pan 214 is provided below the outlet portion of the third air passage 232 (upward inclined air passage 232 b). Particularly in the present embodiment, the tip of the second grain tray 214 forms a part of the third air passage 232 (the bottom surface of the upwardly inclined air passage 232 b).
The inclination angle of the upward inclined air passage 232b of the third air passage 232 is substantially the same as the inclination angle of the first screen line 212 or/and the second screen line 213. Further, the angle of inclination of the upwardly inclined duct 232b of the third duct 232 is substantially the same as the angle of inclination of the upwardly inclined duct 224a of the second duct 224.
According to the above configuration, the sort air is supplied separately to the upper and lower portions of the screen box 210 by the first air passage 223 and the second air passage 224, and thus the sort air can be passed from the lower portion to the upper portion of the screen box 210. Further, the sort air can be supplied to the front end side of the screen box 210 through the second air passage 224, and the sort air can be made to pass from the front end side to the rear end side of the screen box 210. Further, as a result of forming the second duct 224 in a U-turn manner, the duct length of the second duct 224 becomes long, and therefore the flow of the sort air is likely to become a laminar flow. Therefore, the sorted air having a stable flow can be supplied.
Next, the first screen wire 212 and the second screen wire 213 are explained by fig. 22 and 23.
As shown in fig. 22 and 23, the first sifting line 212 and the second sifting line 213 are arranged side by side in the front-rear direction at the rear end portion of the first kernel tray 211. The first sifting line 212 and the second sifting line 213 are disposed above the second grain pan 214 and above the rough sifter 215. That is, the second screen line 213 of the first screen line 212 and the second screen line 213 is disposed above the coarse screen 215 and overlaps the coarse screen 215 in a side view. A predetermined gap O is formed between the rear end of the first screen wire 212 and the front end of the second screen wire 213.
The gap O overlaps with the tip end side of the coarse screen 215 in a plan view. That is, the gap O overlaps the rear end of the second grain pan 214 in a plan view.
Alternatively, instead of the first screen wire 212 and the second screen wire 213, a sifting-down sorting section other than the screen wire, such as a straw walker, a metal plate punching-type coarse screen, or a net-like or metal plate punching-type grain screen, may be used. However, from the viewpoint of increasing the amount of dropping from the dropping-sorting section, it is preferable to use a screen wire.
The first screen wire 212 is formed in a substantially wave shape in side view. For example, the first wire screen 212 is composed of piano wire. The first screen wire 212 is inclined so that the rear end side rises in a side view. The rear end side of the first screen wire 212 is provided at a position higher than the front end side of the second screen wire 213. Also, the first sifting line 212 is provided at the rear end portion of the first grain tray 211. That is, the first screen wire 212 is fixed to the rear end portion (the wavy portion located on the rearmost end side) of the first grain tray 211.
The second screen wire 213 is formed in a substantially wave shape in side view. For example, the second wire mesh 213 is composed of piano wire. The second screen wire 213 is inclined so that the rear end side rises in a side view. The second wire screen 213 has a larger inclination angle than the first wire screen 212. The second screen wire 213 is provided at a position higher than the first screen wire 212. At least a part of the second screen wire 213 protrudes upward from the upper side of the screen box 210. The second screen wire 213 is disposed above the front end side of the coarse screen 215, and at least a part thereof overlaps the front end side of the coarse screen 215 in a plan view. Further, the second screen 213 is disposed above the first type recovery portion 208, and at least a part thereof overlaps the first type recovery portion 208 in a plan view.
According to the above configuration, the first wire mesh 212 and the second wire mesh 213 are formed in a substantially wave shape, and thus, the feeding action of the threshed objects can be applied by the first wire mesh 212 and the second wire mesh 213. Therefore, the threshed products from the first grain tray 211 can be smoothly conveyed and sorted by the first and second sifting lines 212 and 213.
In addition, the first screen wire 212 and the second screen wire 213 extend above the coarse screen 215, and thus the threshed processed matter roughly sorted by the first screen wire 212 and the second screen wire 213 is supplied to the coarse screen 215. Therefore, the sorting load applied to the coarse screen 215 can be reduced. Further, if the sorting load applied to the rough screen 215 can be reduced, a large amount of crops can be sorted without enlarging the rough screen 215 and further without enlarging the threshing device 215.
Next, the first 216, second 217 and third 218 straw walker will be described by means of figures 24-26.
As shown in figures 24-26, the first straw walker 216 has a plurality of first frame plates 216a arranged at predetermined intervals G1 in the left-right direction. A first straw walker 216 is provided at the rear end of the coarse screen 215. The rear end of the first straw walker 216 is arranged to overlap the second straw walker 217 (second frame plate fixing member 217 b) in plan view.
The second straw walker 217 is arranged behind the first straw walker 216. The second straw walker 217 has a plurality of second frame plates 217a arranged at a predetermined interval G2 in the left-right direction, a second frame plate fixing member 217b to which the front end portions of the plurality of second frame plates 217a are fixed, and a second screen 217c provided between the adjacent second frame plates 217 a. The rear end of the second straw walker 217 (second frame plate 217 a) is arranged to overlap the front end of the third straw walker 218 (third frame plate fixing member 218 b) in plan view.
A second screen 217c is fixed to the second frame plate fixing member 217 b. That is, a second frame plate 217a is fixed to a lower surface of the second frame plate fixing member 217b, and a second screen wire 217c is fixed to an upper surface of the second frame plate fixing member 217 b.
A third straw walker 218 is arranged behind the second straw walker 217. The third straw walker 218 includes a plurality of third frame plates 218a arranged at a predetermined interval G3 in the left-right direction, a third frame plate fixing member 218b to which the front end portions of the plurality of third frame plates 218a are fixed, and a third screen 218c provided between the adjacent third frame plates 218 a.
A third screen 218c is fixed to the third frame plate fixing member 218 b. That is, the third frame plate 218a is fixed to a lower surface of the third frame plate fixing member 218b, and the third screen 218c is fixed to an upper surface of the third frame plate fixing member 218 b.
Here, as shown in figure 24, the second and third straw walkers 217 and 218 are longer in the fore and aft direction than the first straw walker 216. And the second straw walker 217 and the third straw walker 218 are formed from the same component. The second straw walker 217 and the third straw walker 218 are arranged at the same height. The first straw walker 216 is arranged above the second straw walker 217 and the third straw walker 218. That is to say, the first straw walker 216 of the first straw walker 216, the second straw walker 217 and the third straw walker 218 is configured highest.
Further, as shown in figure 25, the first and second straw movers 216, 217 are arranged to overlap one another when viewed from above. And the second and third straw movers 217 and 218 are arranged to overlap each other in plan view. The interval G2 of the plurality of second shelves 217a is the same as the interval G3 of the plurality of third shelves 218 a. Further, an interval G1 of the plurality of first shelves 216a is larger than an interval G2 of the plurality of second shelves 217a and an interval G3 of the plurality of third shelves 218 a.
According to the above configuration, the threshed processed material from the rear end of the coarse screen 215 falls from the first straw walker 216 to the second straw walker 217, and the mass of the threshed processed material is broken up by the impact of the falling threshed processed material. The crushed threshed material is sorted by a third straw walker 218 in addition to the second straw walker 217. Therefore, the grain recovery rate can be improved for the threshed product from the rear end of the coarse screen 215.
[ fourth embodiment ]
A fourth embodiment of the present invention will be explained below.
[ integral constitution of combine harvester ]
Hereinafter, an embodiment in which the present invention is applied to a wheeled combine harvester will be described with reference to the drawings. As shown in fig. 27, a combine harvester 301 is a full-stalk feeding type combine harvester for harvesting crops such as rice and wheat. The combine harvester 301 includes a traveling unit 302 for supporting the machine body, a cab 303 located above the traveling unit 302, a harvesting unit 304 located in front of the cab 303, a threshing unit 305 located behind the machine body, and a storage unit 306 located above the threshing unit 305.
The traveling unit 302 is provided with a pair of left and right front wheels 307 and a pair of right and left rear wheels 308 serving as steering wheels, and a traveling transmission (not shown) for transmitting power from the engine to the pair of left and right front wheels 307 and the pair of right and left rear wheels 308. A hydrostatic continuously variable transmission (corresponding to a "transmission" and a "first working unit". hereinafter, referred to as "HST") is provided in a traveling transmission.
The harvesting portion 304 is provided with a harvesting blade 360 for cutting the stalks of the crop. The cutting unit 304 is vertically moved up and down by swinging about a swing fulcrum P by expansion and contraction of a hydraulic cylinder, not shown. The harvesting unit 304 is provided with a raking reel 361, and the raking reel 361 pulls up the crop by rotating around a left and right shaft not shown and rakes the harvested stalks rearward. The rake reel 361 swings around a swing fulcrum Q by expansion and contraction of a hydraulic cylinder not shown, and ascends and descends.
[ concerning the driving part ]
As shown in fig. 28 and 29, the driver unit 303 includes: a driver seat 310 disposed at a center portion of the body; a main shift lever 311 (corresponding to an "operation lever") supported by a lever box 313 disposed on the right side of the operator's seat 310 and capable of instructing a shifting operation to the HST; and a steering wheel 314. By operating the steering wheel 314, the rear wheels 308 as steered wheels can be steered.
As shown in fig. 28, 30, and 32, a rod guide 350 is formed on the upper surface of the rod box 313. The main shift lever 311 is inserted into the lever guide 350, supported inside the lever box 313, and operated to swing along the lever guide 350. Main shift lever 311 is located near driver's seat 310 (diagonally right forward of operator D). The rod guide 350 is formed with an on-road travel region D1, a working region D2, and a retreat region R in this order from the front. The lever box 313 is configured such that the lever guide 350 is located at substantially the same height as the seat surface 318 of the driver's seat 310.
As shown in fig. 30, when the combine harvester 301 is caused to travel on a road other than a field, the main shift lever 311 is operated to be positioned in the road travel region D1. When the combine harvester 301 is to perform a harvesting operation in the field, the main gear lever 311 is operated to be located in the operation area D2. When the combine harvester 301 is retreated, the main shift lever 311 is operated to be positioned in the retreat region R. In the on-road traveling range D1 and the working range D2, the traveling speed of the machine body increases as the main shift lever 311 is pushed back forward. In the reverse range R, the speed at which the engine body is reversed increases as the main shift lever 311 is pushed backward. In this way, the travel speed of the machine body is adjusted by pushing and pulling the main shift lever 311 forward and backward.
The upper surface of the lever box 313 is formed to be curved upward, and the working area D2 is located at the topmost part of the lever box 313. As described above, the lower the position (position away from the body) of the main shift lever 311 is as the main shift lever 311 is operated to the front side, the arm can be extended without being in a restrained posture, as compared with the case where the upper surface of the lever box 313 is formed in a horizontal plane. Further, as shown in fig. 28, since the work area D2 that is frequently used is located slightly forward of the operator, the cutting work can be performed in a comfortable posture when the main shift lever 311 is operated to the work area D2.
As shown in fig. 30, the main shift lever 311 is provided with a seesaw switch 334 (corresponding to the "first command input means") and a seesaw switch 337 (corresponding to the "second command input means"). The hydraulic cylinder for raising and lowering the cutting unit 304 is instructed to operate by the input operation of the seesaw switch 334. That is, the hydraulic cylinder that raises and lowers the harvesting unit 304 constitutes a harvesting raising and lowering control unit (corresponding to a "second working unit"). Then, the hydraulic cylinder for raising and lowering the raking reel 361 is instructed to operate by the input operation of the seesaw switch 337. That is, the hydraulic cylinder that raises and lowers the raking reel 361 constitutes a reel raising and lowering control section (corresponding to a "third working section").
[ shape of Main Shift Lever ]
The main shift lever 311 is made of resin, and is supported by a lever box 313 via a metal lever 321 as shown in fig. 31. The main shift lever 311 includes a grip portion 322 and a shaft portion 323 that supports the grip portion 322.
As shown in fig. 31, the shaft 323 is provided with a through hole 346 through which the seesaw switch 334 and the harness 345 of the seesaw switch 337 are inserted, and a through hole 347 through which the lever 321 is inserted. As shown in fig. 33, the through-hole 346 for the harness 345 and the through-hole 347 for the rod 321 are provided in an overlapping state.
A predetermined gap 344 is provided in the vertical direction between the bottom surface of the shaft portion 323 and the lever guide 350 of the lever box 313 to avoid interference between the main shift lever 311 and the lever box 313. A lower end protruding portion 343 protruding in the outer circumferential direction is formed at the lower end portion of the shaft portion 323. Even if the gap 344 is large, the harness 345 and the rod 321 are prevented from being completely seen from the gap 344 by the lower-end bulge 343. That is, even when the clearance 344 is set large and the assembly accuracy when the main shift lever 311 is assembled to the lever 321 is set not to be high, the assembly is visually excellent.
As shown in fig. 30, the grip portion 322 is formed in a horizontally long shape with roundness as a whole. The grip portion 322 includes a first surface 324, a second surface 326 that is a surface different from the first surface 324, an upper surface 327 that is a surface different from the first surface 324 and the second surface 326, and a back surface 331 located on the opposite side of the second surface 326. The surface of the grip portion 322 is rounded except for the first surface 324. Therefore, when the index finger f, the middle finger m, the ring finger r, and the little finger p are positioned on the second surface 326 or the upper surface 327, the hand H is easily adapted to the main shift lever 311.
The grip portion 322 is formed to have a width in the lateral direction wider than the width of the hand H in plan view. That is, the grip portion 322 is formed to have a width in the direction along the second surface 326 larger than a width in the direction along the first surface 324.
The first surface 324 is a surface on which the thumb t is disposed. As shown in fig. 28, 30, and 31, the first surface 324 is formed in a substantially planar shape, and is inclined so as to be located farther to the left than the left-right center line X of the driver seat 310 in a plan view, that is, the first surface 324 is inclined so as to be located farther to the front than the driver D in a plan view. The boundary between the first surface 324 and the second surface 326, the boundary between the first surface 324 and the upper surface 327, and the boundary between the first surface 324 and the rear surface 331 are formed in a slightly angular shape. The first surface 324 is provided with the above-described seesaw switch 334.
A cutout 325 is formed in a portion of the first surface 324 on the side closer to the operator D and a portion of the back surface 331. The cutout portion 325 is formed in a portion of the first surface 324 on the side closer to the operator D. The notch 325 is formed in a triangular shape whose end widens from the rear surface 331 side toward the first surface 324, and is formed in a rounded shape curved toward the lever center side of the main shift lever 311 in accordance with the shape of the thumb t. Thus, when the thumb t is operated to swing around the base of the finger in order to operate the seesaw switch 334, the notch 325 serves as a guide for the thumb t.
The second surface 326 is a surface on which the index finger f, the middle finger m, the ring finger r, and the little finger p are arranged. The second surface 326 is formed in a rounded shape as a whole, and is inclined so as to be located rearward as being farther rightward from the left-right center line X in a plan view. That is, the second surface 326 is inclined so as to be located more rearward as it is farther from the operator D in a plan view. The second surface 326 is formed to be continuous with the upper surface 327 with a slight roundness. The second surface 326 is provided with the above-described seesaw switch 337.
As shown in fig. 28, an outer bulging portion 328, a recessed portion 329, and an inner bulging portion 330 are formed in this order on the second surface 326 in proximity to the left-right center line X.
As shown in fig. 28, 29, and 31, an end of the outer bulge 328 on the side away from the operator D in the grip portion 322 is formed at an upper end portion of the second face 326 (a boundary portion between the second face 326 and the upper surface 327). An upper end of the outer bulge 328 is formed continuously with a front end of the upper surface 327. The outer bulging portion 328 is formed in an arc shape curved toward the front (to be precise, slightly diagonally right forward away from the body of the operator D) in a plan view. When the hand H is placed on the main shift lever 311, the ring finger r and the little finger p can be bent to be hooked on the outer bulging portion 328, and when the main shift lever 311 is pulled, slipping of the hand H can be prevented.
As shown in fig. 28, 29, and 31, the concave portion 329 is formed continuously with the left side of the outer bulging portion 328. The recessed portion 329 is formed in a shape recessed toward the back surface 331 from the upper end portion of the upper surface 327 to the lower end portion of the second surface 326. The index finger f can be positioned in the concave portion 329, and the concave portion 329 serves as a grip when the main shift lever 331 is gripped.
As shown in fig. 28, 29, and 31, the inner bulge 330 is formed continuously with the left side of the concave portion 329. The inner bulge 330 is formed by bulging a portion that spans the first face 324 and the second face 326 toward the front (to be precise, slightly diagonally right-ahead away from the body of the operator D). The upper end of the inner bulge 330 is formed continuously with the front end of the upper surface 327. The inner bulging portion 330 is formed in a shape protruding forward in front view. The inner bulge 330 can catch the index finger f and prevent the hand H from slipping when the main shift lever 331 is pulled.
By configuring the outer bulge 328, the concave 329, and the inner bulge 330 in this way, the above portions become grip portions when gripping the main shift lever 331, and the index finger f, the middle finger m, the ring finger r, and the little finger p are firmly positioned, so that the position of the hand H is stabilized. Further, since the position of the hand H is stable, the main shift lever 311 can be firmly gripped, and the operability of the main shift lever 311 is improved.
The upper surface 327 is a surface on which the palm P1 is mainly placed. As shown in fig. 29 and 31, the upper surface 327 is inclined so as to be located more downward toward the right away from the left-right center line X in the machine body. That is, the upper surface 327 is inclined so as to be located more downward away from the operator D. The boundary portion between the upper surface 327 and the back surface 331 is formed to be continuous with circularity.
The back surface 331 is a surface against which the palm P1 mainly abuts when the main shift lever 311 is pushed. As shown in fig. 30, the back surface 331 is formed with a slight roundness so as to be curved toward the driver's seat 310 side, is formed adjacent to the upper surface 327 and the first surface 324, and is formed on the opposite side of the second surface 326. As shown in fig. 28, the back surface 331 is inclined so as to be located rearward as it is farther rightward from the left-right center line X. The lower end portion of the back surface 331 is formed in a substantially planar shape that faces obliquely upward and rearward. The end of the grip 322 remote from the driver's seat 310, that is, the boundary between the second surface 326, the upper surface 327, and the back surface 331, is formed in a shape bulging in a substantially hemispherical shape obliquely rearward to the right.
In the grip portion 322, a dividing surface, not shown, is formed at a position avoiding the portion of the insertion rod 321. The grip portion 322 can be divided into two parts by a dividing surface. By dividing the grip portion 322, maintenance of the harness 345 and the rod 321 housed inside the grip portion 322 can be easily performed.
[ configuration of switches ]
As shown in fig. 30-32, the rocker switch 334 is disposed on the first face 324. The seesaw switch 334 is attached to the first surface 324 via a resin base 335 so as to be slightly raised. The seesaw switch 334 is formed on the side portion of the grip portion 322 closer to the operator D side. The seesaw switch 334 has one knob 334A and another knob 334B formed continuously with the one knob 334A. The seesaw switch 334 is a momentary switch, and is configured to automatically return to a neutral position when the one knob 334A or the other knob 334B is released from being pressed.
As shown in fig. 30, when at least the main shift lever 311 is positioned in the front region (the region used in the normal cutting operation) of the working region D2, the seesaw switch 334 is disposed such that one of the knobs 334A is positioned above the other knob 334B so as to tilt forward from below toward above. The seesaw switch 334 is inclined such that the direction in which the one knob 334A and the other knob 334B are juxtaposed is along a tangential direction of a circumference (a tangential direction at a substantially center of a swing locus (arc) of the tip end portion of the thumb t) centered on a vertex on the rear side of the cutout portion 325 (substantially triangular shape). That is, the seesaw switch 334 is disposed such that the tilt direction of the seesaw switch 334 is along the swing direction of the thumb t. Therefore, the operation of the one knob 334A or the other knob 334B can be easily performed by the thumb t. In particular, in a state where the main shift lever 311 is positioned in the front region (normal cutting work region) of the work region D2 and the tip end thereof is slightly inclined forward from the wrist L, the seesaw switch 334 is arranged so as to be inclined forward from below toward above, and therefore the thumb t does not assume an excessive posture during the swing operation, and the operation of the seesaw switch 334 is facilitated.
When one knob 334A is swung by pressing, the cutting portion 304 is raised, and when the other knob 334B is swung by pressing, the cutting portion 304 is lowered. That is, the seesaw switch 334 is configured to input an operation command to the cutout unit 304 when one of the knobs 334A is pressed, and to input an operation command to the cutout unit 304 in reverse of the operation command when the one of the knobs 334A is pressed when the other knob 334B is pressed. When the pressing of one knob 334A or the other knob 334B is released, the elevation of the cutting section 304 is stopped.
Further, since the cutting portion 304 is raised by operating the knob 334A located at the upper side and the cutting portion 304 is lowered by operating the knob 334B located at the lower side, the raising and lowering operations of the cutting portion 304 and the operation of the seesaw switch 334 are perceptively linked, and the knobs 334A and 334B can be selected quickly, so that selection errors of the knobs 334A and 334B are not likely to occur.
As shown in fig. 31, the seesaw switch 337 is disposed on the second surface 326 at a position slightly away from the outer bulging portion 328 downward (at a position slightly away from the upper surface 327). That is, the seesaw switch 337 is disposed at a position that is difficult to reach when the middle finger m and the ring finger r are slightly bent, but is sufficient to reach when the middle finger m and the ring finger r are intentionally extended. The seesaw switch 337 is slightly lifted from the second surface 326 via a resin base 338. A seesaw switch 337 is formed on a side portion of the grip portion 322 remote from the operator D. The seesaw switch 337 has one knob 337A and another knob 337B formed continuously with the one knob 337A.
As shown in fig. 30, the seesaw switch 337 is arranged in a state inclined such that one of the knobs 337A is positioned above the other knob 337B. The seesaw switch 337 is tilted in the direction of the tilt of the upper surface 327. The seesaw switch 337 is a momentary switch, and is configured to automatically return to a neutral position when the pressing of one of the knobs 337A or the other of the knobs 337B is released.
When one knob 337A is swung by pressing, the rake reel 361 is raised. When the other knob 337B is swung by pressing, the rake reel 361 descends. That is, the seesaw switch 337 is configured to input an operation command to the rake reel 361 when one knob 337A is pressed, and to input an operation command to the rake reel 361 that is opposite to the command when the one knob 337A is pressed when the other knob 337B is pressed. When the pressing of one of the knobs 337A and the other of the knobs 337B is released, the lifting and lowering of the raking reel 361 is stopped.
Further, with such a configuration, the raising and lowering operation of the rake reel 361 and the operation of the seesaw switch 337 are perceptually linked, and the knobs 337A and 337B can be quickly selected, so that selection errors of the knobs 337A and 337B are not easily generated.
[ operating method for the main shift lever 311 ]
When performing work in the field, the main shift lever 311 is operated to be located at the work area D2.
When the body is accelerated, the back surface 331 is pushed forward by the palm P1, whereby the main shift lever 311 is pushed forward. At this time, since it is not necessary to apply a large force to the thumb t, the index finger f, the middle finger m, the ring finger r, and the little finger p, the operation of the seesaw switch 334 by the thumb t and the operation of the seesaw switch 337 by the middle finger m and the ring finger r can be performed.
On the other hand, when the body is decelerated, the index finger f, the middle finger m, the ring finger r, and the little finger p are hooked on the second surface 326 and pulled, whereby the main shift lever 311 is pulled rearward. At this time, since it is not necessary to apply a large force to the thumb t, the middle finger m, and the ring finger r, the operation of the seesaw switch 334 by the thumb t and the operation of the seesaw switch 337 by the middle finger m and the ring finger r can be performed. At this time, the seesaw switch 337 is positioned on the second surface 326 at a position that is difficult to reach when the middle finger m and the ring finger r are slightly bent but is reached when the middle finger m and the ring finger r are intentionally extended, so that erroneous operation of the seesaw switch 337 in association with the pulling operation of the main shift lever 311 is prevented.
Therefore, while the main shift lever 311 is pushed or pulled to accelerate or decelerate the machine body, the seesaw switch 334 is operated by the thumb t to raise or lower the cutting section 304, or the seesaw switch 337 is operated by the middle finger m and ring finger r to raise or lower the raking reel 361.
For example, when harvesting a fallen crop, it is preferable that the height of the stalk of the crop cut by the cutting blade 360 of the cutting unit 304 and the height of the raking action of the raking drum 361 on the cut stalk be appropriately changed while the forward speed of the machine body is adjusted at a reduced speed according to the fallen state of the crop. The main shift lever 311 of the present configuration can easily perform such an operation by one-handed operation.
When switching between traveling on the road other than the field, traveling during work in the field, and reverse, the main shift lever 311 moves between the road traveling region D1, the work region D2, and the reverse region R.
When the main shift lever 311 is moved from the on-road travel region D1 to the working region D2 and from the reverse region R to the working region D2, the main shift lever 311 is pressed leftward. At this time, the index finger f can be hooked to the inner bulge 330, and therefore the index finger f does not slip. Further, the outer bulging portion 328 is gripped by the ring finger r and the little finger p, and thereby the force is easily applied.
When the main shift lever 311 is moved from the working range D2 to the backward range R and from the working range D2 to the on-road traveling range D1, the main shift lever 311 is pressed rightward. At this time, since the base of the thumb t can be hooked on the notch 325, the thumb t can be prevented from slipping. Further, the outer bulging portion 328 is gripped by the ring finger r and the little finger p, and thereby the force is easily applied.
[ other embodiment of the fourth embodiment ]
(1) In the fourth embodiment, the second working unit is a cutting elevation control unit configured by a hydraulic cylinder that elevates the cutting unit 304, and the third working unit is a roll elevation control unit configured by a hydraulic cylinder that elevates the raking roll 361. For example, the second working unit may be a roll lifting control unit, and the third working unit may be a cutting lifting control unit. The second working unit or the third working unit may be a different working unit from the cutting elevation control unit and the roll elevation control unit.
(2) Although the fourth embodiment has been described with respect to a general combine harvester, the fourth embodiment may be a corn harvester that harvests corn. For example, as shown in fig. 34, a corn harvester 401 is equipped with a harvesting section 402 for harvesting a crop in a field, and a rotary chopper 403 for crushing stalks left in the field after the crop is harvested.
The harvesting unit 402 swings around a swing fulcrum P2 by extending and contracting the hydraulic cylinder 404, and moves up and down. The second working unit is a harvesting elevation control unit constituted by a hydraulic cylinder 404 for raising and lowering the harvesting unit 402. For example, the harvesting unit 402 may be configured to swing up and down based on the operation of a seesaw switch 334 provided in the main shift lever 311.
In this case, the harvesting unit 402 may be raised by operating the upper knob of the seesaw switch 334, and the harvesting unit 402 may be lowered by operating the lower knob of the seesaw switch 334. This makes it possible to select the knob quickly and to prevent a selection error of the knob, since the raising and lowering operation of the harvesting unit 402 and the operation of the seesaw switch 334 are perceptually linked.
The rotary cutter 403 is freely swingable up and down about a left-right axis in the machine body. The rotary chopper 403 is swung about a swing fulcrum P3 by extension and contraction of the hydraulic cylinder 405, thereby being lifted and lowered. The third operation unit is a rotary shredder lifting/lowering control unit constituted by a hydraulic cylinder 405 for lifting/lowering the rotary shredder 403. For example, the swing up and down of the rotary shredder 403 may be performed by the operation of a seesaw switch 337 provided on the main shift lever 311.
In this case, the rotation of the rotary shredder 403 (movement toward the body of the operator D) may be performed by operating the knob of the seesaw switch 337 positioned above (on the side closer to the body of the operator D), and the rotation of the rotary shredder 403 (movement away from the body of the operator D) may be performed by operating the knob of the seesaw switch 337 positioned below (on the side away from the body of the operator D). Thus, the lifting operation of the rotary shredder 403 and the operation of the seesaw switch 337 are perceptually linked, the knob can be selected quickly, and selection errors of the knob are less likely to occur.
Here, the second working unit is a harvesting elevation control unit including a hydraulic cylinder 404 for elevating the harvesting unit 402, and the third working unit is a rotary chopper elevation control unit including a hydraulic cylinder 405 for elevating the rotary chopper 403.
(3) In the fourth embodiment, although the notch portion 325 is formed in the grip portion 322, the grip portion may be a grip portion in which the notch portion 325 is not formed.
(4) The grip portion 322 is formed to have a width in the direction along the second surface 326 larger than the width in the direction along the first surface 324 in a plan view, but may be formed to have a width in the direction along the first surface 324 larger than the width in the direction along the second surface 326 in a plan view.
(5) In the fourth embodiment, the upper surface 327 of the grip portion 322 is inclined so as to be located lower as it is farther from the operator D, but the present invention is not limited thereto. The grip portion may have a substantially horizontal upper surface.
(6) In the fourth embodiment, the outer bulging portion 328, the recessed portion 329, and the inner bulging portion 330 are formed in the grip portion 322, but a grip portion in which the outer bulging portion 328, the recessed portion 329, and the inner bulging portion 330 are formed may be arbitrarily.
(7) In the fourth embodiment described above, the lever guide 350 that guides the main shift lever 311 is provided at a height position substantially equal to the seat surface 318 of the operator's seat 310, but the lever guide 350 may be provided at a height position different from the seat surface 318 of the operator's seat 310.
(8) In the fourth embodiment described above, the shaft portion 323 of the main shift lever 311 is provided with the through hole 346 for the harness 345 including the seesaw switch 334 and the seesaw switch 337, and the through hole 347 for the lever 321 supporting the main shift lever 311, but the present invention is not limited thereto. The harness 345 may be wound outside the main shift lever 311.
(9) In the fourth embodiment described above, the first surface 324 is inclined so as to be located forward as the distance from the operator D increases in a plan view, but the first surface 324 may be a surface substantially parallel to the front-rear direction of the machine body.
(10) In the fourth embodiment described above, the through-insertion hole 346 for the harness 345 and the through-insertion hole 347 for the rod 321 are provided in the grip portion 322 in a state of being overlapped, but the through-insertion hole 346 for the harness 345 and the through-insertion hole 347 for the rod 321 may be provided independently without being overlapped.
(11) In the fourth embodiment, the lower end bulging portion 343 is formed in the grip portion 322, but the grip portion may be a grip portion in which the lower end bulging portion 343 is not formed.
(12) In the fourth embodiment described above, the steering portion 303 is provided with the steering wheel 314, but other steering supports may be provided on a steering rod or the like instead of the steering wheel 314.
(13) In the fourth embodiment described above, the cutting unit 304 is raised by operating the knob 334A, and the cutting unit 304 is lowered by operating the knob 334B, but the present invention is not limited thereto. For example, the following reverse configuration is also possible: the cutting portion 304 is raised by operating the knob 334B, and the cutting portion 304 is lowered by operating the knob 334A.
(14) In the fourth embodiment, the raising of the rake reel 361 is realized by operating the knob 337A, and the lowering of the rake reel 361 is realized by the knob 334B, but the present invention is not limited thereto. For example, the raising of the rake reel 361 may be performed by operating the knob 337B, and the lowering of the rake reel 361 may be performed by operating the knob 334A.
(15) In the fourth embodiment, the first command input means is the seesaw switch 334, and the second command input means is the seesaw switch 337, but the present invention is not limited thereto. For example, the first command input means and the second command input means may be two push-button switches that instruct reverse operations, respectively. Further, the first command input means and the second command input means may be one push-button switch for performing two different commands by the short-press operation and the long-press operation, respectively.
(16) In the fourth embodiment described above, the main shift lever 311 is described as an example of the operation lever, but the present invention can also be applied to a sub-shift lever.
(17) In the fourth embodiment described above, the example in which the traveling unit 302 is configured by a plurality of wheels is shown, but the traveling unit 302 may be configured by a crawler device.
(18) In the fourth embodiment described above, the main shift lever 311 is disposed on the right side of the driver's seat 310, but may be disposed on the left side.
(19) In the fourth embodiment described above, the rear wheels 308 are steered wheels, but the front wheels 307 may be steered wheels.
Industrial applicability
The present invention can be applied to a crawler travel device equipped in a general-type combine harvester having a threshing device for throwing a root side from which straw is cut and a spike tip side into a threshing chamber, in addition to a combine harvester having a half-feed type threshing device. In addition to the combine harvester, the crawler travel device can be used for a work vehicle such as a harvester, a tractor, a backhoe, or a transport vehicle, which is a harvesting target of crops other than straw such as onion and carrot.
Description of the reference numerals
1: crawler travel device
3: frame of machine body
6: mounting component (reinforcing plate)
6 a: internal thread
8: roller shaft
10: cutting part
11: driver seat
12: threshing device
17: gear box
20: track frame
21: drive sprocket
22: tension sprocket
23: roller wheel
26: caterpillar band
25: guide wheel
27: cross beam
28: track guide
30: advancing and retreating mechanism
31: holding unit
31 a: side plate
31 b: base seat
32: support rod
33: adjusting screw mechanism
33 a: adjusting screw body
33 b: first screw receiving part
33 c: second screw receiving part
60: mounting unit
60A: channel-shaped member
60B: boss part
61: side plate part
62: floor part
63: guide wheel mounting unit
63 a: bracket plate
80: ball bearing
81: sealing member
82: bleeder
90: fixing bolt
91: backing plate
106: feeding device
107: feeder box
112: dust-collecting fan
113: motor with a stator having a stator core
114: circuit breaker
115: fan shell
120: catching component
121: round bar (Bar shaped component)
124: stud (protruding part)
125: knob nut (fastener)
126: pressing frame (pressing component)
170: top board
170 a: dust absorption mouth
207: windmill
208: first kind recovery part
210: screen box
211: first cereal grain dish (cereal grain dish)
212: first sieve line (sieve line, under-sieve sorting part)
213: second sieve line (sieve line, under-sieve sorting part)
214: second grain tray
215: coarse screen
221: blade component
222: fan shell
223: first air path
224: second air passage
232: third air passage
301: combine harvester
308: rear wheel
310: driver seat
311: main gear shift lever (operating lever, gear shift lever)
313: rod box
314: steering wheel
318: seat surface
321: rod
322: gripping part
323: shaft part
324: first side
325: cut-out part
326: second surface
327: upper surface of
328: outer bulge
329: concave part
330: inner bulge
334: seesaw switch (first instruction input mechanism)
337: seesaw switch (second instruction input mechanism)
343: lower end bulge
345: electrical wiring
346: through-inserting hole
347: through-inserting hole
350: rod guide
401: corn harvester
402: harvesting part
403: rotary shredding machine
404: hydraulic cylinder (reaping lifting control part, second operation part)
405: hydraulic cylinder (lifting control part of rotary chopper, third operation part)
D: operator
A: arm(s)
H: hand (W.E.)
O: gap
P: palm of hand
X1: axial center
t: thumb (thumb)
f: index finger
m: middle finger
r: ring finger
P: the little finger.
Claims (4)
1. A crawler travel device comprising: the crawler frame extends along the front and back direction of the machine body and is supported on the machine body frame; a drive sprocket disposed at a front portion of the track frame; a tension sprocket disposed at a rear portion of the track frame; a crawler belt wound over the drive sprocket and the tension sprocket; and a plurality of rollers for guiding the crawler belt to the ground,
the crawler belt unit is provided with an installation unit which is detachably installed on an installation component and extends along the front and back direction of the machine body, the installation component is arranged on the crawler belt frame, and the installation unit is used for supporting the rollers which are arranged along the front and back direction of the machine body by taking a plurality of rollers as units.
2. A harvester, comprising:
a feeder having a feeder tank having a dust suction port formed in a top plate, and transporting harvested straw in the feeder tank;
a dust suction fan for sucking the dust in the feeder box from the dust suction port and discharging the dust to the outside; and
a catching member mounted to the dust suction port to catch the straw flowing toward the dust suction fan,
the catching member includes a plurality of rod members arranged so as not to intersect with each other across the dust suction port.
3. A harvester comprising a threshing device, characterized in that,
in the screen box of the threshing device, a grain tray is arranged at the conveying starting end side,
a screen wire is arranged at the conveying terminal part of the grain tray,
the screen wire is formed into a substantially wave shape when viewed from the side.
4. A harvester, equipped with:
a first working section; a second working unit different from the first working unit; and a third working unit different from the first working unit and the second working unit,
an operation lever capable of instructing the first working unit to operate is provided in the vicinity of the driver's seat,
the operating lever is provided with a grip portion having a first surface on which a thumb of an operator is positioned and a second surface different from the first surface on which four fingers other than the thumb are positioned,
the first surface is provided with a first command input means capable of inputting a reverse operation command by instructing the second working unit to perform a reverse operation and swinging a thumb along the first surface and around a base of the finger,
the second surface is provided with a second instruction input means capable of instructing the third working section to perform an opposite operation and inputting an opposite operation instruction by a pressing operation of any one of four fingers other than the thumb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966601.3A CN112136512B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
Applications Claiming Priority (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012154770A JP5937444B2 (en) | 2012-07-10 | 2012-07-10 | Threshing device |
| JP2012-154770 | 2012-07-10 | ||
| JP2012174316A JP2014030408A (en) | 2012-08-06 | 2012-08-06 | Combine harvester |
| JP2012-174316 | 2012-08-06 | ||
| JP2012-283346 | 2012-12-26 | ||
| JP2012283346A JP5901511B2 (en) | 2012-12-26 | 2012-12-26 | Normal combine |
| JP2013016049A JP2014144759A (en) | 2013-01-30 | 2013-01-30 | Crawler traveling device |
| JP2013-016049 | 2013-01-30 | ||
| CN201380036774.3A CN104411155B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN202010966601.3A CN112136512B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| PCT/JP2013/067519 WO2014010422A1 (en) | 2012-07-10 | 2013-06-26 | Tracked running gear device and harvester |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380036774.3A Division CN104411155B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112136512A true CN112136512A (en) | 2020-12-29 |
| CN112136512B CN112136512B (en) | 2024-03-01 |
Family
ID=49915886
Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010968014.8A Pending CN112136513A (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN202010966601.3A Active CN112136512B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN201610520504.5A Active CN106105549B (en) | 2012-07-10 | 2013-06-26 | Harvester |
| CN201710685944.0A Active CN107347383B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN201380036774.3A Active CN104411155B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN201610520194.7A Active CN106105579B (en) | 2012-07-10 | 2013-06-26 | Harvester |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010968014.8A Pending CN112136513A (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610520504.5A Active CN106105549B (en) | 2012-07-10 | 2013-06-26 | Harvester |
| CN201710685944.0A Active CN107347383B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN201380036774.3A Active CN104411155B (en) | 2012-07-10 | 2013-06-26 | Crawler travel device and harvester |
| CN201610520194.7A Active CN106105579B (en) | 2012-07-10 | 2013-06-26 | Harvester |
Country Status (2)
| Country | Link |
|---|---|
| CN (6) | CN112136513A (en) |
| WO (1) | WO2014010422A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156937A (en) * | 2018-01-10 | 2018-06-15 | 王友芳 | Combine harvester |
| CN108207303B (en) * | 2018-03-13 | 2019-10-15 | 郑世杰 | Maize harvesting machine |
| CN108966820A (en) * | 2018-08-15 | 2018-12-11 | 郭淑华 | A kind of new energy crops harvester |
| WO2020047678A1 (en) * | 2018-09-07 | 2020-03-12 | Brewin Roy | Crop dust separation system |
| WO2022047518A1 (en) * | 2020-09-07 | 2022-03-10 | Metal Testing Pty Ltd | A track guide assembly |
| CN114711021B (en) * | 2021-05-17 | 2023-06-20 | 山东登海种业股份有限公司 | Straw collecting assembly, device and process of corn combine harvester |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107347383B (en) | 2020-10-09 |
| CN106105579A (en) | 2016-11-16 |
| CN107347383A (en) | 2017-11-17 |
| CN106105549B (en) | 2019-09-27 |
| CN106105579B (en) | 2020-01-17 |
| WO2014010422A1 (en) | 2014-01-16 |
| CN112136513A (en) | 2020-12-29 |
| CN104411155A (en) | 2015-03-11 |
| CN104411155B (en) | 2017-09-01 |
| CN112136512B (en) | 2024-03-01 |
| CN106105549A (en) | 2016-11-16 |
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