CN113677193A - Work vehicle, harvester, and work machine - Google Patents
Work vehicle, harvester, and work machine Download PDFInfo
- Publication number
- CN113677193A CN113677193A CN202080026219.2A CN202080026219A CN113677193A CN 113677193 A CN113677193 A CN 113677193A CN 202080026219 A CN202080026219 A CN 202080026219A CN 113677193 A CN113677193 A CN 113677193A
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- clutch
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- engine
- radiator
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Classifications
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- 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
- A01D41/12—Details of combines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D57/00—Delivering mechanisms for harvesters or mowers
- A01D57/01—Devices for leading crops to the mowing apparatus
- A01D57/02—Devices for leading crops to the mowing apparatus using reels
- A01D57/03—Devices for leading crops to the mowing apparatus using reels with supplementary controlled movement of the crop-engaging members, e.g. of the tines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
- A01D69/08—Clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Combines (AREA)
Abstract
The disclosed device is provided with: a drive source capable of rotationally driving; a working device driven by a drive source; a transmission belt capable of transmitting power from a drive source to a working device; a belt-tension type working clutch (23A) which can be switched between a transmission state in which power is transmitted to the transmission belt and a non-transmission state in which power is not transmitted to the transmission belt; a clutch operation unit capable of switching the operation of the working clutch (23A) between a transmission state and a non-transmission state based on a connection control signal and a disconnection control signal, wherein the connection control signal is a control signal related to the connection operation of the working clutch (23A), and the disconnection control signal is a control signal related to the disconnection operation of the working clutch (23A); and a rotation speed detection sensor capable of detecting the rotation speed (R) of the drive source.
Description
Technical Field
The invention relates to a work vehicle, a harvester and a work machine.
Background
[ first background Art ]
For example, patent document 1 discloses a work vehicle in which a working device (in the document, "a harvesting unit" or "a threshing unit") is driven by a drive source. A transmission belt (in the literature, "belt") is interposed between the drive source and the working device, and the transmission belt is arranged to be switchable between a state in which power of the drive source is transmitted and a state in which power of the drive source is not transmitted by the working clutch. When the transmission belt is switched to a state in which the power of the drive source is transmitted, the working clutch is operated after the rotation speed of the drive source is reduced. This can reduce the slip of the belt when the belt is switched, and protect the belt.
[ second background Art ]
Conventionally, as a harvester, for example, a harvester described in patent document 2 is known. The harvester described in patent document 2 includes a cutting unit ("cutting unit [ 3 ] in the document) for cutting while raking an established crop, and the cutting unit includes a raking drum (" raking drum [ 12 ] in the document) for raking the established crop. The raking reel comprises: left and right reel frames ("reel frames [ 19 ] in the literature) rotationally driven about a rotational axis (axis [ X1 ] in the literature) extending in the left-right direction of the machine body; a bar-shaped support member (in the literature, "support frame [ 20 ]) extending in the left-right direction of the machine body, and provided with a plurality of support members so as to straddle the left and right reel frames; and a plurality of tines (tines [ 22 ] in the literature) attached to the support member at intervals in the right-left direction of the machine body. A fork tine is provided with: a support portion (in the literature, "mounting portion [ 35 ]) that is supported by the support member; a spring section (in the literature, "coil section [ 33 ]) located below the support member; and an action part (in the literature, "action part [ 32 ]) which is provided in a state of hanging from the spring part and performs a raking action on the standing crop.
[ third background Art ]
In a conventional combine harvester as an example of a working machine on which an engine is mounted, a radiator for cooling the engine is supported by a support frame formed in a rectangular frame shape so as to surround an outer periphery of the radiator. The support frame is fixed to the body frame by means of bolt fastening or the like. For example, in a work machine disclosed in patent document 3, a dust-proof case that is closed to the outside of a body of a radiator is supported so as to be swingable integrally with an engine cover, and when the dust-proof case and the engine cover are swung outward, the radiator is opened so as to face outward.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2005-178631
Patent document 2: japanese patent laid-open publication No. 2013-110983
Patent document 3: japanese laid-open patent publication No. 2017-200469
Disclosure of Invention
Problems to be solved by the invention
[ first technical problem ]
However, as shown in patent document 1, in the configuration in which the rotation speed of the drive source is reduced when the work clutch switches the transmission belt, a time lag occurs from when the operator first switches the transmission belt until the switching of the transmission belt is actually completed. Therefore, depending on the length of the time lag, the worker may be inconvenienced. Therefore, an object of the present invention is to provide a work vehicle that is comfortable for both the protection of a transmission belt and the operation of an operator.
[ second technical problem ]
In the harvester described in patent document 2, the tines rake the standing crop from the front. In this case, the plant is in contact with the spring portion from the rear, and the plant is easily wound around the spring portion. In view of the above, a harvester in which crops are not easily wound around the spring portions of the tines is desired.
[ third technical problem ]
In the work machine disclosed in patent document 3, the worker may detach the radiator in order to remove dust attached to the inside of the body of the radiator. In the above-described conventional structure, when such a radiator removal operation is performed, it is necessary to release the connection between the support frame surrounding the outer periphery of the radiator and the body frame after the dust-proof case is opened, and to integrally remove the support frame, which is a large-sized member, and the radiator to the outside, which is a troublesome operation for the operator. Therefore, it is desired to improve the workability in the maintenance work of the radiator.
Means for solving the problems
The work vehicle according to the present invention for solving the above-described [ first technical problem ] is characterized by comprising: a drive source capable of rotationally driving; a working device driven by the drive source; a transmission belt capable of transmitting power from the drive source to the working device; a belt-tensioning type operation clutch that can be switched between a transmission state in which power is transmitted to the transmission belt and a non-transmission state in which power is not transmitted to the transmission belt; a clutch operation unit capable of switching the working clutch between the transmission state and the non-transmission state based on a connection control signal and a disconnection control signal, the connection control signal being a control signal related to a connection operation of the working clutch, the disconnection control signal being the control signal related to a disconnection operation of the working clutch; and a rotation speed detection sensor capable of detecting a rotation speed of the drive source, wherein when the rotation speed is equal to or less than a predetermined threshold value when the clutch operation unit detects the communication control signal, the clutch operation unit immediately performs a transmission switching operation for bringing the work clutch in the non-transmission state into the transmission state, and when the rotation speed is higher than the threshold value when the clutch operation unit detects the communication control signal, the clutch operation unit performs a first rotation speed control for reducing the rotation speed of the drive source so that the rotation speed becomes equal to or less than the threshold value, and performs the transmission switching operation when the rotation speed has become equal to or less than the threshold value.
According to the present invention, when the rotation speed of the drive source is equal to or less than the predetermined threshold value, the clutch operating means immediately switches the operation clutch to the transmission state, so that the operation of the operation clutch is not delayed, and the rapidity of the operation clutch is ensured. Further, when the rotation speed of the drive source is higher than the threshold value, the clutch operating means switches the operation clutch to the transmission state after the rotation speed of the drive source is reduced to the threshold value or less, and therefore the slip of the transmission belt is reliably reduced. That is, according to the present invention, since the timing of the switching operation of the work clutch is adjusted according to the rotation speed of the drive source, a work vehicle which is comfortable to both protect the transmission belt and operate by the operator can be realized. In the present invention, the meaning of "the rotation speed is equal to or less than a predetermined threshold" also includes the meaning of "the rotation speed is lower than a predetermined threshold". The meaning of "the rotation speed is higher than the threshold value when the clutch operation means detects the communication control signal" also includes the meaning of "the rotation speed is equal to or higher than the threshold value when the clutch operation means detects the communication control signal". In the first rotational speed control of the present invention, the meaning of "reducing the rotational speed of the drive source so that the rotational speed becomes equal to or less than the threshold" also includes the meaning of "reducing the rotational speed of the drive source so that the rotational speed becomes less than the threshold". The "rotation speed of the drive source" in the present invention may be a target rotation speed for the drive source or may be a rotation speed actually detected by the drive source.
In the present invention, it is preferable that the clutch operation means performs second rotation speed control for increasing the rotation speed of the drive source to be higher than the threshold value when the first rotation speed control is performed and the transmission switching operation is completed in a state where the rotation speed has become equal to or lower than the threshold value. In the present invention, it is preferable that an accelerator operation member for setting the rotation speed is provided, and the clutch operation means performs the second rotation speed control so that the rotation speed reaches the set rotation speed of the accelerator operation member.
According to this configuration, even if the rotation speed of the drive source is reduced, the rotation speed of the drive source can be automatically increased after the switching operation of the working clutch is completed. Therefore, compared with a structure in which an operator manually increases the rotation speed of the drive source, the bother of the operator is reduced, and the operability of the work clutch is reliably ensured. Further, the number of rotations of the drive source is increased to the set number of rotations of the accelerator operation element after the switching operation of the working clutch is completed, whereby the annoyance of the operator is further reduced.
In the present invention, it is preferable that a first rate of change and a second rate of change be set, the first rate of change being a rate of change per unit time of the rotation speed in the first rotation speed control, the second rate of change being a rate of change per unit time of the rotation speed in the second rotation speed control, and the first rate of change being smaller than the second rate of change. Further, in the present invention, it is preferable that the first rate of change is constant regardless of the rotation speed at the time when the clutch operation unit detects the communication control signal.
For example, when the driving source drives a device other than the working device, it is conceivable that the rotational speed of the driving source is rapidly reduced in accordance with the first rotational speed control due to the driving load of the device applied to the driving source. In this case, if the operation of the driving source and the equipment is changed abruptly, the operator may be surprised or feel unpleasant. In the present configuration, since the first change rate is smaller than the second change rate, the change in the rotation speed when the rotation speed of the drive source is reduced is slower than the change in the rotation speed when the rotation speed of the drive source is increased. Therefore, even when a device other than the working device is driven, the operation of the driving source and the device does not change rapidly, and the risk of the operator being surprised or annoyed is greatly reduced. Further, by the structure in which the first rate of change is constant regardless of the rotation speed of the drive source, the variation in the operation of the apparatus is further stabilized.
In the present invention, it is preferable that a first interval time from completion of the first rotational speed control to start of the transmission switching operation and a second interval time from completion of the transmission switching operation to start of the second rotational speed control be set, the second interval time being longer than the first interval time.
Upon switching of the transmission belt to the operating state, it is conceivable that the transmission belt may slip or vibrate. Therefore, it is desirable to ensure a time for stably adapting the transmission belt during a period from completion of the transmission switching operation to start of the second rotation speed control. On the other hand, from the viewpoint of operability of the working clutch, it is desirable to perform the switching operation of the clutch operation means as quickly as possible. According to this configuration, since the second interval time is longer than the first interval time, the belt can be sufficiently adapted during the second interval time. This protects the transmission belt, and also does not cause waiting time discomfort to the operator, and the working clutch is switched to the transmission state as quickly as possible.
In the present invention, it is preferable that the communication control device further includes a notification unit capable of performing notification regarding the transmission switching operation, and the notification unit continues the notification regarding the transmission switching operation from a time when the clutch operation unit detects the communication control signal to a time when a preset time period has elapsed after the transmission switching operation is started.
According to this configuration, since the notification unit notifies the operator of the state in which the clutch operation unit is switching the working clutch to the transmission state, the operator can recognize that the clutch operation unit is being switched. Thus, even when the working clutch is not immediately switched to the transmission state when the clutch operation means detects the communication control signal, the risk of the operator misinterpreting the communication control signal as a failure can be avoided.
In the present invention, it is preferable that the setting time is set to a time before the completion of the delivery switching operation, and the notification unit stops the notification at a time when the setting time elapses.
When the clutch operation unit detects the connection control signal, the notification unit notifies the operator of the state of the switching operation of the clutch operation unit. Therefore, by the configuration in which the notification is stopped at the time before the switching operation is completed, the notification by the notification unit does not continue all the time, and the risk of the notification being unpleasant for the operator is reduced.
The harvester according to the present invention for solving the above-described (second technical problem) is provided with a harvesting unit for harvesting while raking the standing crop, the harvesting unit including a raking drum for raking the standing crop, wherein the raking drum includes: left and right reel frames which are rotationally driven around a rotational axis extending in the left-right direction of the machine body; a rod-shaped support member extending in the left-right direction of the machine body, the support member being provided in plurality so as to straddle the left and right reel frames; and a plurality of tines attached to the support member at intervals in a right-left direction of the machine body, the tines including: a support portion supported by the support member; a spring portion located below the support member; and an action part which is arranged in a state of hanging from the spring part and performs a raking action on the standing crops, wherein the harvester is provided with a cover member, and the cover member is provided with: a fitting portion fitted to an outer peripheral portion of the support member; and a cover portion extending downward through the rear of the spring portion and covering the spring portion from the rear.
According to this feature, since the spring portion is covered with the cover portion from the rear, the standing crop does not come into contact with the spring portion from the rear when the tine harrow is implanted. Therefore, the crop is not easily wound around the spring portion. The cover member is attached to the support member in a state where the fitting portion is fitted to the outer peripheral portion of the support member. This enables the cover member to be reliably attached to the support member.
Further, in the present invention, it is preferable that the support portion is fixed to an outer peripheral portion of the support member by a bolt, and the cover member includes a portion which is provided so as to be continuous with the fitting portion and covers a head portion of the bolt.
According to this feature, the head of the bolt is covered by the portion of the cover member that is continuous with the fitting portion, and therefore the crop is less likely to be wound around the head of the bolt.
Further, in the present invention, it is preferable that the fork tine is formed in a shape that passes behind the supporting member and reaches the spring portion, the fitting portion is fitted to a front portion of an outer peripheral portion of the supporting member, and the cover portion extends downward in a state of being in contact with a rear portion of the fork tine.
According to this characteristic configuration, the fitting portion can be fitted neatly to the outer peripheral portion of the support member, avoiding the tines passing behind the support member. The cover portion extends downward while contacting the rear portions of the tines. This makes it possible to reliably support the cover portion at the rear portion of the fork tine, reduce the gap between the cover portion and the rear portion of the fork tine, and prevent a crop that may be wound around the spring portion from entering through the gap.
Further, in the present invention, it is preferable that the cover portion extends downward to a height position lower than a lower end of the spring portion in a state of being in contact with a rear portion of the spring portion.
According to this characteristic configuration, the cover portion can be reliably supported at the rear portion of the spring portion, and the gap between the cover portion and the rear portion of the spring portion can be reduced, thereby effectively preventing the crop that may be wound around the spring portion from entering through the gap. Further, the spring portion can be protected from the crop that is being wound around the spring portion from below by a portion of the cover portion that is located at a lower side than the lower end of the spring portion.
Further, in the present invention, it is preferable that the cover portion extends downward to a height position lower than a lower end of the fitting portion, and the harvester includes a support bracket that supports a lower portion of the cover portion located lower than the lower end of the fitting portion.
According to this characteristic structure, a portion (lower portion of the cover portion) of the cover member that is apart from a portion (fitting portion) attached to the support member can be reliably supported by the support bracket.
Further, in the present invention, it is preferable that the support portion is fixed to an outer peripheral portion of the support member by a bolt, and the support bracket is fixed to the outer peripheral portion of the support member together with the support portion by the bolt.
According to this characteristic structure, the fixing structure can be simplified by sharing the bolts.
Further, in the present invention, it is preferable that the cover member includes a first engaging portion, and the support bracket includes a second engaging portion, and the support bracket is fixed to an outer peripheral portion of the support member by the bolt in a state where the first engaging portion and the second engaging portion are engaged with each other.
According to this characteristic configuration, the cover member can be reliably attached to the support member via the support bracket so as not to fall off the support member.
Further, in the present invention, it is preferable that the support bracket includes a pressing portion that presses the fitting portion from an opposite side of the support member when the support member is viewed in cross section.
According to this characteristic configuration, the fitting portion can be reliably held by the pressing portion so as not to fall off from the outer peripheral portion of the support member.
Further, in the present invention, it is preferable that the cover member is an elongated member covering the plurality of tines, and the lower portions of the cover member located on both the left and right sides are supported by the support bracket, respectively.
According to this characteristic structure, the lower portion of the cover can be supported with good left-right balance.
Further, in the present invention, it is preferable that the tine includes: one of the support portions; the left and right spring portions are disposed so as to be distributed left and right with respect to the one support portion; and left and right action parts corresponding to the left and right spring parts, respectively.
According to this characteristic configuration, the support portion is shared between the left spring portion and the left operating portion and between the right spring portion and the right operating portion. This reduces the number of parts of the fork and reduces the weight of the fork.
Further, in the present invention, it is preferable that a support bracket supporting the cover portion is attached to the support member between the left and right spring portions.
According to this characteristic configuration, the support bracket can be provided by utilizing the space between the left and right spring portions.
Further, in the present invention, it is preferable that the spring portion is located forward and downward of the support member, and the cover portion is inclined forward and downward along a rear portion of the spring portion in a side view.
According to the present feature, the hood portion is inclined along the rear portion of the support member and the rear portion of the spring portion. This makes it possible to reduce the gap between the cover portion and the rear portion of the spring portion, thereby preventing a crop that may be wound around the spring portion from entering through the gap.
The work machine according to the present invention for solving the above-described [ third technical problem ] is characterized by comprising: an engine cover that covers the engine to form an engine room, supports the driver seat from below, and is open laterally outward; a radiator for cooling an engine, provided in the engine room on a lateral outer side of the engine; a dust-proof case provided on the lateral outer side of the heat sink and blocking the lateral outer side of the heat sink in a state of allowing air to pass therethrough and preventing dust from passing therethrough; a cooling fan which is provided on the lateral inner side of the radiator and cools the radiator by taking in external air through the dust-proof case; a fan cowling that is provided so as to straddle the cooling fan and the radiator while surrounding an outer periphery of an air intake space between the cooling fan and the radiator, and that guides outside air from the radiator to the cooling fan; and a support frame that is provided so as to straddle the radiator and an opening portion formed on the lateral inner side of the dust-proof case, and supports the radiator, wherein the radiator is supported by the support frame so as to be slidable rearward along a cooling surface, and an opening through which the radiator can be taken out rearward is formed in a rear portion of the engine room.
According to the present invention, the worker can perform the radiator removal work as follows: the radiator is slid rearward relative to the support frame through an opening formed in the rear portion of the engine room, and the radiator is removed to the outside of the engine room through the opening. The operator does not need to remove the support frame, but only the radiator. Therefore, it is not necessary to perform troublesome work such as removing the support frame and the heat sink toward the outside in both directions. As a result, the workability in the case of performing the maintenance work of the radiator can be improved.
In the present invention, it is preferable that the fan cowl be arranged so as to be dividable into a plurality of divided bodies in the circumferential direction.
According to this configuration, when the fan cowling is removed in association with the removal operation of the radiator, the worker removes the fan cowling for each divided body. As a result, as compared with the case where the entire fan cowling is integrally formed, the work of removing the fan cowling is facilitated, and the workability of the maintenance work is further improved.
In the present invention, it is preferable that a part of the plurality of segments of the fan cowling is supported by the heat sink, and the other segment of the plurality of segments is separated from the heat sink.
According to this configuration, when the fan cowling is attached to and detached from the radiator, the worker only needs to attach and detach a part of the divided bodies to and from the radiator, and the worker can efficiently perform the work without performing the work of attaching and detaching the other divided bodies to and from the radiator.
In the present invention, it is preferable that the part of the divided body is detachably supported by the radiator and is extracted rearward in an extracting direction of the radiator.
According to this configuration, when the fan cowling is removed, the worker divides the fan cowling into the partial segment body and the other segment body, and integrally takes out the partial segment body and the radiator in a state where the partial segment body is supported by the radiator, so that the worker can efficiently perform the work.
In the present invention, it is preferable that an upper portion of the fan cowling covering an upper side of the air intake space, a lower portion of the fan cowling covering a lower side of the air intake space, and a near side portion of the fan cowling covering a near side in the taking-out direction of the air intake space are removable.
According to this configuration, even if the upper portion, the lower portion, and the near portion are taken out rearward in the taking-out direction, there is no possibility that the cooling fan is disturbed. Therefore, the fan cowling can be taken out without interfering with the cooling fan.
In the present invention, it is preferable that the upper side portion, the lower side portion, and the near side portion are integrally formed.
According to this configuration, the operator can integrally take out the upper portion, the lower portion, and the near portion, and therefore, the operator can efficiently perform the work as compared with a case where these are taken out separately.
In the present invention, it is preferable that a vertical wall portion of the fan cowling covering a side surface of the cooling fan side of the air intake space is divided into a near-side vertical wall portion located on a near side in the taking-out direction and a depth-side vertical wall portion located on a depth side in the taking-out direction, the near-side vertical wall portion is integrally taken out rearward with the upper portion, the lower portion, and the near-side portion, and the depth-side vertical wall portion is integrally provided with a depth-side portion covering a depth side in the taking-out direction of the air intake space.
According to this configuration, when the fan cowling is removed, the operator can integrally take out the upper portion, the lower portion, the near side portion, and the near side vertical wall portion in a state where the depth side vertical wall portion and the depth side portion that are integrally provided are separated, and can efficiently perform the work.
In the present invention, it is preferable that an air intake opening through which the cooling fan sucks air is formed in the vertical wall portion, a peripheral wall portion protruding toward the cooling fan is formed in an outer peripheral portion of the air intake opening, the cooling fan is provided in a state of being inserted into the peripheral wall portion, a boundary between the near-side vertical wall portion and the deep-side vertical wall portion in the peripheral wall portion is detachably coupled, and the upper portion, the lower portion, and the near-side portion are supported by the heat sink.
According to this configuration, since the outer peripheral portion of the air intake opening is covered with the peripheral wall portion, air intake by the cooling fan can be performed efficiently. Since the plurality of segments are connected at the boundary of the peripheral wall portion by the peripheral wall portion protruding toward the cooling fan, the connection and disconnection operations are easier than in a structure in which the end surfaces of the wall surfaces of the plurality of segments are butted against each other. The upper portion, the lower portion, and the near-side portion of the fan cowling are supported by the radiator. Therefore, the worker takes out the upper portion, the lower portion, and the near-side portion of the fan cowling together with the radiator by simply releasing the connection at the boundary of the peripheral wall portion.
In the present invention, it is preferable that the support frame is formed in a rectangular frame shape along an outer periphery of the heat sink, and a cover body capable of opening and closing the opening is provided in a lower frame-shaped portion of the support frame, the lower frame-shaped portion having an opening penetrating vertically therethrough.
According to this configuration, dust attached to the cooling air inlet portion of the heat sink may fall and accumulate in the lower frame portion after the cooling operation of the cooling fan is completed. When the cover is opened, the accumulated dust is discharged downward through the opening. When the cooling fan is operated, the opening is closed by the cover body, so that cooling air can appropriately pass through the dust-proof case.
Drawings
Fig. 1 is a side view showing a combine harvester as a working vehicle in a first embodiment.
Fig. 2 is a plan view showing a combine harvester as a work vehicle in the first embodiment.
Fig. 3 is a diagram showing a power transmission system of the combine harvester according to the first embodiment.
Fig. 4 is a functional block diagram showing the switching operation and data flow of the clutch operation unit in the first embodiment.
Fig. 5 is a flowchart showing the clutch switching control according to the first embodiment.
Fig. 6 is a flowchart showing the clutch switching control according to the first embodiment.
Fig. 7 is a timing chart showing the clutch switching control in the first embodiment.
Fig. 8 is a timing chart showing the clutch switching control in the first embodiment.
Fig. 9 is a timing chart showing the clutch switching control in the first embodiment.
Fig. 10 is a right side view showing a combine harvester according to the second embodiment.
Fig. 11 is a plan view showing a cutout portion in the second embodiment.
Fig. 12 is a right side view showing the rake reel of the second embodiment.
Fig. 13 is a plan view showing the rake reel in the second embodiment.
FIG. 14 is a right side view showing the spool frame and inside tines of the second embodiment.
Fig. 15 is an exploded perspective view showing the mounting structure of the inner tine and the cover member in the second embodiment.
FIG. 16 is a front view showing the inner tine and cover member in the second embodiment.
Fig. 17 is a cross-sectional view of XVII-XVII in fig. 16.
Fig. 18 is a cross-sectional view of XVIII-XVIII in fig. 16.
Fig. 19 is an overall side view of the combine harvester in the third embodiment.
Fig. 20 is an overall plan view of the combine harvester according to the third embodiment.
Fig. 21 is a rear view showing an internal structure of an engine room in the third embodiment.
Fig. 22 is a front view showing an internal structure of an engine room in the third embodiment.
Fig. 23 is a plan view showing an internal structure of an engine room in the third embodiment.
Fig. 24 is a rear sectional view showing a support structure of a heat sink in the third embodiment.
Fig. 25 is an exploded perspective view showing a support structure of a heat sink in the third embodiment.
Fig. 26 is a sectional view showing a state in which the cover is attached in the third embodiment.
Fig. 27 is a perspective view showing a separated structure of the fan cowling in the third embodiment.
Fig. 28 is a diagram showing a support structure of a supply pipe in the third embodiment.
Detailed Description
Hereinafter, when the front-rear direction of the travel machine body of the combine harvester is defined, the travel direction of the machine body in the working state is defined, and when the left-right direction of the machine body is defined, the left-right direction is defined in a state of being viewed along the travel direction of the machine body. That is, the direction indicated by reference numeral (F) in fig. 1, 2, 10, 11, 19, and 20 is the front of the machine body, and the direction indicated by reference numeral (B) in fig. 1, 2, 10, 11, 19, and 20 is the rear of the machine body. The direction indicated by reference numeral (L) in fig. 2, 11, and 20 is the left of the machine body, and the direction indicated by reference numeral (R) in fig. 2, 11, and 20 is the right of the machine body. Therefore, the body left-right direction corresponds to the traveling body width direction.
[ first embodiment ]
A first embodiment of a work vehicle according to the present invention will be described below with reference to fig. 1 to 9. The first embodiment shows an example of the present invention for solving the above-described [ first technical problem ]. Fig. 1 and 2 show a general type combine harvester which harvests crops such as rice, wheat, and soybean.
A pair of right and left crawler belt traveling devices 2 are provided at a lower portion of a body frame 1 of a traveling body.
A harvesting unit 3 as a working device is provided in front of the traveling machine body, and the harvesting unit 3 harvests a crop to be harvested and conveys the crop rearward. The threshing device 4, the grain tank 5, the grain discharge device 6, and the like are provided on the machine frame 1 as the working devices of the present invention. The threshing device 4 performs threshing processing on the harvested grain stalks conveyed from the harvesting unit 3, and separates the threshing processed product obtained by the threshing processing into grains and a discharge. The grain tank 5 stores grains obtained by the threshing device 4. The grain discharging device 6 discharges the grains stored in the grain box 5 out of the machine. The combine harvester is configured into a full-feeding type, the root of the planted grain stalks is cut off for harvesting, and the harvested grain stalks are all thrown into the threshing device 4.
The body frame 1 is provided with an operator's part 7, and the operator's part 7 is an area with a cab on which a driver gets and performs an operation. The driving part 7 is positioned at the right side of the front part of the machine body, and the grain box 5 is positioned at the rear part of the driving part 7. Further, in a state where the threshing device 4 is located on the left side and the grain tank 5 is located on the right side, the threshing device 4 and the grain tank 5 are arranged in the left-right direction. An engine 8 as a driving source which can be rotationally driven is provided below the driver section 7. The threshing device 4 is configured to: a threshing cylinder 9 is provided which is rotationally driven around an axis in the front-rear direction of the machine body, and threshing is performed by the threshing cylinder 9 while conveying cut grain stalks which are conveyed to the front part of the threshing device 4 to the rear part of the machine body.
The harvesting section 3 is provided with a harvesting section 10 and a feeder 11 arranged in a front-rear direction. The harvesting unit 10 is provided in the front of the harvesting unit 3, and harvests the planted straw as the harvesting target, and laterally feeds and gathers the harvested straw to the middle part of the machine body in the width direction. The feeder 11 is connected to the rear part of the harvesting part 10 and conveys the whole stalks of the harvested grain stalks harvested and collected by the harvesting part 10 to the middle part of the harvesting part 10 in the machine body width direction toward the rear of the threshing device 4. The harvesting unit 3 including the harvesting unit 10 and the feeder 11 is supported so as to be vertically swingable about a horizontal axis P1 between a raised position and a lowered position by telescopic operation of a hydraulic cylinder 12 for lifting, and the hydraulic cylinder 12 is mounted so as to straddle the machine frame 1 and the feeder 11.
The cutting section 10 is supported by a cutting frame 13 formed by connecting an angular pipe, an angular member having an L-shaped cross section, and the like. The harvesting section 10 includes a pair of left and right grain dividers 14, a raking reel 15, a cutter 16, and a traverse auger 17. A pair of left and right grain dividers 14, 14 are provided at the foremost end of the traveling machine body, and divide grain between standing grain stalks to be harvested and standing grain stalks to be non-harvested. The raking reel 15 is located behind and above the grain divider 14, and rakes the planted grain stalks as the harvesting target rearward. The cutter blade 16 is arranged, for example, in a pusher type, is positioned behind the crop divider 14, and cuts the root side of the planted straw raked rearward by the raking reel 15. The horizontal feed auger 17 is located between the cutter 16 and the feeder 11, and feeds the cut straw cut by the cutter 16 horizontally so as to converge toward the middle in the left-right direction and feed the straw to the feeder 11.
[ Transmission structure of the first embodiment ]
The transmission structure for transmitting the power of the engine 8 to the threshing device 4, the harvesting unit 3, and the like will be described below. Fig. 3 is a system diagram of a transmission mechanism for transmitting the driving force of the engine 8 to the crawler travel device 2, the harvesting unit 3, the threshing device 4, and the grain discharging device 6, respectively. The engine 8 is provided with an output shaft 8 a. The output shafts 8a protrude to the left and right of the body from the main body of the engine 8. A first belt 23 is wound so as to straddle the respective pulleys of the output shaft 8a and the wind turbine drive shaft 21, and a second belt 24 is wound so as to straddle the respective pulleys of the output shaft 8a and the travel transmission shaft 22. Thereby, the output shaft 8a is arranged to be able to belt-drive the windmill drive shaft 21 and the travel transmission shaft 22, respectively.
A belt-tensioned threshing clutch 23A is provided in the first belt 23, and the first belt 23 is arranged to be able to transmit power by applying tension to the first belt 23 by the threshing clutch 23A. The threshing clutch 23A corresponds to the "operating clutch" of the present invention.
The power transmitted to the travel transmission shaft 22 is transmitted to the travel driving device 60. Although detailed description is omitted, the travel drive unit 60 is provided at a lower portion of the front portion of the machine body, and includes a hydrostatic continuously variable transmission and a transmission. The travel driving device 60 is configured to drive the left and right crawler travel devices 2 and 2 at a speed suitable for a driving operation based on a driving operation such as a shift operation device and a swing operation device, not shown, provided in the driving unit 7. The travel driving device 60 drives the left and right crawler travel devices 2, 2 at a constant speed or substantially a constant speed during straight travel and drives the left and right crawler travel devices 2, 2 at a speed difference during cornering.
The transmission power of the wind turbine drive shaft 21 is transmitted to the primary processed object collecting unit 28 and the secondary processed object collecting unit 29 via the sorting belt 25. The transmission power of the windmill drive shaft 21 is transmitted to the threshing relay shaft 37 via the threshing belt 30. The wind turbine 33 is provided on the wind turbine drive shaft 21, and the wind turbine 33 rotates around the wind turbine drive shaft 21 as the axis.
The sorting belt 25 is wound so as to straddle the wind turbine drive shaft 21, the relay shaft 26, the primary processed object collecting unit 28, and the secondary processed object collecting unit 29, and the primary processed object collecting unit 28 and the secondary processed object collecting unit 29 are integrally driven by the belt via the sorting belt 25. A sorting belt 27 is wound so as to straddle the relay shaft 26 and the swing sorting device 32, and the transmission power of the wind turbine drive shaft 21 is transmitted to the swing sorting device 32 via the sorting belt 25, the relay shaft 26, and the sorting belt 27.
The threshing belt 30 is wound so as to straddle the wind turbine drive shaft 21 and the threshing relay shaft 37. A bevel gear 43a is provided at the end of the threshing relay shaft 37 opposite to the side around which the threshing belt 30 is wound, and the bevel gear 43a engages with a bevel gear 43c of the threshing cylinder shaft 9A. The threshing cylinder shaft 9A is a rotation axis of the threshing cylinder 9 and extends in the front-rear direction, and the bevel gear 43c is provided at the front end portion of the threshing cylinder shaft 9A. Further, an intermediate shaft 39 is provided on the side opposite to the threshing intermediate shaft 37 across the threshing cylinder shaft 9A in the left-right direction. A bevel gear 43b is provided at the left end of the intermediate shaft 39, and the bevel gear 43b engages with the bevel gear 43 c. The threshing relay shaft 37 and the intermediate shaft 39 are disposed on the same axial center in the transverse direction of the machine body, and the rotation power of the threshing relay shaft 37 is transmitted to the threshing cylinder shaft 9A and the intermediate shaft 39 via bevel gears 43a, 43b, and 43c, respectively, in accordance with the rotation of the threshing relay shaft 37. The intermediate shaft 39 rotates in the direction opposite to the rotation direction of the threshing intermediate shaft 37. The threshing intermediate shaft 37, the threshing cylinder shaft 9A, and the intermediate shaft 39 are covered with the axle boxes 36, respectively. The threshing intermediate shaft 37 has a left end projecting to the left of the machine body than the axle box 36, and the intermediate shaft 39 has a right end projecting to the right of the machine body than the axle box 36.
The transmission power of the threshing relay shaft 37 is arranged to be transmittable to the harvesting input shaft 42 via the harvesting belt 40. The harvesting belt 40 is provided in a state of extending forward from the threshing relay shaft 37. The transmission power of the intermediate shaft 39 is arranged to be transmittable to the cutting input shaft 42 via the cutting transmission belt 41. The harvesting belt 41 is located on the opposite side of the harvesting belt 40 in the left-right direction with respect to the feeder 11.
The harvesting input shaft 42 functions as a drive shaft of the feeder 11 and is provided in a state of protruding outward to the left from the conveyance box of the feeder 11. Cutting belts 40, 41 are wound around the left and right ends of the cutting input shaft 42, respectively. A sprocket is attached to the harvesting input shaft 42 at a position inside the feeder 11, and the harvesting input shaft 42 and the feeder conveying chain 11A rotate integrally via the sprocket.
The cutting belt 40 is provided with a belt-tightening type cutting clutch 40A, and the cutting belt 40 is disposed so as to be capable of transmitting power by applying tension to the cutting belt 40 by the cutting clutch 40A. The cutting belt 41 is provided with a belt-tightening type cutting clutch 41A, and the cutting belt 41 is disposed so as to be capable of transmitting power by applying tension to the cutting belt 41 by the cutting clutch 41A. The respective cut clutches 40A, 41A are not arranged so as to apply tension to the respective cut belts 40, 41 at the same time, and either one of the cut clutches 40A, 41A applies tension to either one of the cut belts 40, 41. When the harvesting clutch 40A applies tension to the harvesting belt 40, the harvesting unit 10 and the feeder 11 rotate so as to convey the harvested straws rearward of the machine body. When the harvesting clutch 41A applies tension to the harvesting belt 41, the harvesting unit 10 and the feeder 11 are reversed, and the harvested straws are returned to the front of the machine body when the feeder 11 is clogged with the harvested straws, for example.
The power transmitted from the harvesting input shaft 42 is transmitted to the harvesting relay shaft 45 via a harvesting belt 44 extending in the front-rear direction along the outside of the right side portion of the feeder 11. The transmission power of the harvesting relay shaft 45 is transmitted to the infeed auger 17 via a chain 46 and to the cutting blade 16 via a reciprocating rotation lever 47. The reciprocating rotation lever 47 is disposed to be capable of reciprocating and sliding the cutting blade 16 by reciprocating rotation at a predetermined angle. Further, the power transmitted from the cutting relay shaft 45 is transmitted to the rake reel 15 via the chains 46 and 48 and the belt 49.
A pulley around which the discharge belt 50 is wound is provided at an end portion of the output shaft 8a on the side opposite to the side where the first belt 23 and the second belt 24 are provided, and the discharge belt 50 is wound astride the output shaft 8a and the discharge input shaft 51. A belt-tensioned discharge clutch 50A is provided in the discharge belt 50, and the discharge clutch 50A applies tension to the discharge belt 50, whereby the discharge belt 50 is disposed so as to be able to transmit the power of the engine 8 to the discharge input shaft 51. When the discharge clutch 50A applies tension to the discharge belt 50, the discharge screw 6A inside the grain discharge device 6 rotates via the discharge input shaft 51, and the grains stored in the grain tank 5 are discharged to the outside of the machine via the grain discharge device 6. In this manner, the working device of the present invention is driven by the engine 8 as a driving source.
[ Clutch of first embodiment ]
As described with reference to fig. 3, the threshing clutch 23A, the cut-off clutches 40A and 41A, and the discharge clutch 50A are provided as clutches capable of transmitting power to the belt. These clutches are interposed in the power transmission system described above. The threshing clutch 23A is disposed adjacent to the first belt 23. The cut-off clutch 40A is disposed adjacent to the cut-off belt 40, and the cut-off clutch 41A is disposed adjacent to the cut-off belt 41. The discharge clutch 50A is disposed adjacent to the discharge belt 50. Each of these clutches is a belt tensioner engageable with each of the adjacent drive belts, and is configured to be switchable between a transmission state and a non-transmission state. In the first embodiment, the "transmission state" refers to a state in which the clutch transmits power to each of the adjacent drive belts, and the "non-transmission state" refers to a state in which the clutch does not transmit power to each of the adjacent drive belts. These clutches are configured to be operable by the first clutch operating unit 52A, the second clutch operating unit 52B shown in fig. 4.
Although not shown, the threshing clutch 23A and the first clutch operation unit 52A are coupled by an operation wire. The first clutch operating unit 52A is configured to be able to switch the threshing clutch 23A to a transmission state by tightening the operating wire. Although not shown, the threshing clutch 23A includes a spring, and biases the threshing clutch 23A in a direction away from the first belt 23. Therefore, if the first clutch operating unit 52A does not tension the operating wire of the threshing clutch 23A, the threshing clutch 23A remains in the non-transmission state.
Although not shown, the disconnect clutch 40A and the second clutch operating unit 52B are coupled by an operating wire. The second clutch operating unit 52B is configured to be able to switch the cut clutch 40A to the transmitting state by tightening the operating wire. The cut clutch 41A and the second clutch operation unit 52B are coupled by an operation wire. The second clutch operating unit 52B is configured to be able to switch the cut clutch 41A to the transmitting state by tightening the operating wire. The discharge clutch 50A and the second clutch operating unit 52B are coupled by an operating wire, and the second clutch operating unit 52B is configured to be able to switch the operation of the discharge clutch 50A to the transmission state by tensioning the operating wire. The second clutch operation unit 52B is configured to be capable of individually (independently) switching the clutches 40A, 41A and the exhaust clutch 50A to be operated in the transmitting state and the non-transmitting state, respectively.
Although not shown, the threshing clutch 23A, the harvesting clutches 40A, 41A, and the discharge clutch 50A are each provided with a spring, and the clutches are biased in a direction away from the respective adjacent belts. Therefore, if the second clutch operating unit 52B does not tighten the operating lines of the cut clutches 40A, 41A and the discharge clutch 50A, the cut clutches 40A, 41A and the discharge clutch 50A are maintained in the non-transmission state.
[ Transmission switching operation by the clutch operating means in the first embodiment ]
As shown in fig. 4, the clutch operating unit 52 has a first clutch operating unit 52A and a second clutch operating unit 52B. The first clutch operation unit 52A and the threshing clutch 23A are coupled to each other via an operation wire. Although not shown, the first clutch operating unit 52A has an electric motor, and an operating wire that straddles the first clutch operating unit 52A and the threshing clutch 23A is tightened or loosened by the electric motor.
The second clutch operating unit 52B and the cut clutch 40A are coupled to each other via an operating wire. The second clutch operating unit 52B and the cut clutch 41A are coupled to each other via an operating wire. The second clutch operating unit 52B and the discharge clutch 50A are coupled to each other via an operating wire. That is, three operation lines, i.e., an operation line coupled to the cut clutch 40A, an operation line coupled to the cut clutch 41A, and an operation line coupled to the discharge clutch 50A, are connected to the second clutch operation unit 52B. Although not shown, the second clutch operating unit 52B has an electric motor by which the three operating wires are tensioned or loosened.
The second clutch operation unit 52B is configured to: the three operation wires are individually tensioned or loosened in accordance with the actuation of the electric motor of the second clutch operation unit 52B. For example, three cam mechanisms are interposed between each of the three operation wires and the electric motor so as to correspond to the three operation wires, and the three cam mechanisms are formed in respective shapes corresponding to the three operation wires. Then, as the electric motor operates, each cam mechanism rotates, whereby the three operation wires are individually stretched or loosened. It should be noted that the configuration may be such that: the three operation wires are simultaneously tensioned or loosened in accordance with the actuation of the electric motor of the second clutch operation unit 52B.
The clutch operation Unit 52 has, in addition to the first clutch operation Unit 52A and the second clutch operation Unit 52B, an ECU (Electronic Control Unit), a Memory (e.g., DRAM (Dynamic Random Access Memory), EEPROM (Electrically Erasable Programmable read only Memory)), a relay circuit, various input/output devices, and the like. That is, the clutch operation unit 52 may also be configured as an electronic control unit by which the electric motors of the respective first and second clutch operation units 52A and 52B are controlled.
The operation switch 54 is disposed at an arbitrary position in the driver section 7 (see fig. 1), and is disposed to be operable by a passenger riding on the driver section 7. A control signal of the operation switch 54 is input to the clutch operation unit 52, and the clutch operation unit 52 controls the electric motor of the first clutch operation unit 52A and the electric motor of the second clutch operation unit 52B based on the control signal of the operation switch 54. That is, the electric motors of the first clutch operating unit 52A and the second clutch operating unit 52B are configured to be operated based on the control signal of the operating switch 54, and the respective operating wires are tightened or loosened.
The control signal comprises a connection control signal and a disconnection control signal. That is, the clutch operating unit 52 is configured to be able to detect the on control signal and the off control signal from the operating switch 54. The communication control signal is a control signal related to a communication operation of the clutch, and the clutch is switched from the non-transmission state to the transmission state when the electric motor is rotation-controlled in such a manner as to tension the operation wire based on the communication control signal. The off control signal is a control signal relating to an off operation of the clutch, and the clutch is switched from the transmission state to the non-transmission state when the electric motor is rotation-controlled to loosen the operation wire based on the off control signal.
In this way, the first clutch operation unit 52A can switch the threshing clutch 23A between the transmission state and the non-transmission state based on the connection control signal as the control signal related to the connection operation of the threshing clutch 23A and the disconnection control signal as the control signal related to the disconnection operation of the threshing clutch 23A. The second clutch operation means 52B can switch the clutches 40A, 41A and 50A to the transmission state and the non-transmission state based on the connection control signal as the control signal relating to the connection operation of each of these clutches and the disconnection control signal as the control signal relating to the disconnection operation of these clutches. In other words, the clutch operation unit 52 is capable of switching the clutch between the transmission state and the non-transmission state based on a connection control signal that is a control signal related to the connection operation of the clutch and a disconnection control signal that is a control signal related to the disconnection operation of the clutch.
As described above based on fig. 3, the respective belts shown in fig. 3 are rotationally driven by the power of the engine 8, and therefore the rotational speeds of these belts are proportional to the rotational speed of the engine 8. Hereinafter, the rotation speed of the engine 8 as a drive source is referred to as "engine rotation speed R". The engine speed R includes the meaning of "target speed for the engine 8". The engine speed R may include "the actual speed of the engine 8".
When the belt-tension clutch is switched from the non-transmission state to the transmission state in a state where the engine speed R is high, the transmission belt adjacent to the clutch suddenly starts rotating at a high speed. In this case, a sudden load is applied to the transmission belt, and the transmission belt is subjected to shock, vibration, slippage, or the like, so that the life of the transmission belt may be shortened. In particular, since the first belt 23 transmits power to the working devices including the harvesting unit 3, the threshing device 4, and the like, a large load is likely to be applied to the first belt 23. Therefore, when the clutch is switched from the non-transmitting state to the transmitting state, it is desirable that the engine be in a state where the rotation speed R is low. Therefore, when the clutch operation unit 52 in the first embodiment is configured to be able to adjust the engine speed R when switching the clutch from the non-transmitting state to the transmitting state. Hereinafter, the operation of the clutch operation means 52 to switch the clutch from the non-transmission state to the transmission state is referred to as "transmission switching operation".
The clutch operation unit 52 is configured to be able to input a set rotation speed from the accelerator operation member 53, and is configured to be able to input an actual rotation speed of the engine 8 from the rotation speed detection sensor 55. The accelerator operation member 53 is, for example, a dial switch type or lever type operation member, and is arranged so that the target rotation speed of the engine 8 can be set based on the operation amount of the accelerator operation member 53. The rotation speed detection sensor 55 is, for example, a rotation detector attached to the engine 8.
The clutch operation unit 52 is configured to be able to output an instruction signal to the engine control unit 56 based on the operation amount of the accelerator operation member 53. The engine control unit 56 is configured to be able to perform various controls on the engine 8, and the actual rotational speed of the engine 8 is adjusted by the engine control unit 56 based on the instruction signal from the clutch operation unit 52. The actual rotational speed of the engine 8 is detected by a rotational speed detection sensor 55, and the detected rotational speed thereof is periodically (e.g., every 0.1 second) transmitted as a detection signal from the rotational speed detection sensor 55 to the clutch operating unit 52.
The clutch operation unit 52 is configured to be able to output a notification signal to the notification unit 57, and when the clutch operation unit 52 performs a transmission switching operation of the clutch, the notification signal is output from the clutch operation unit 52 to the notification unit 57. The notification unit 57 is, for example, a monitor, a buzzer, a display lamp, or the like disposed in the driving unit 7, and is disposed so as to be capable of performing notification related to a transmission switching operation. The driver of the driving unit 7 can recognize that the clutch is being switched from the non-transmission state to the transmission state by the notification of the notification unit 57. Note that the notification unit 57 may be configured as a terminal (for example, a smartphone or a portable computer) that is carried by a passenger who is mounted on the driving unit 7 or an operator who is working in a farm.
The clutch operation means 52 will be described with reference to fig. 4 to 6. Fig. 5 and 6 show a flowchart of control in which the first clutch operating unit 52A switches the threshing clutch 23A from the non-transmission state to the transmission state. The "start" in fig. 5 is the timing at which the clutch operation unit 52 detects the communication control signal. From this timing, the clutch switching control is started, and the notification process is started first (step # 01). The notification process is a process in which the clutch operation means 52 outputs a notification signal to the notification unit 57, and the start of the clutch switching control is notified to the occupant of the driver unit 7 via the notification unit 57. The process until the clutch switching control proceeds to step #17 described later, and this notification process is continued.
After the notification process is started, it is determined whether the engine speed R is higher than a preset threshold RL (step # 02). The threshold RL is stored in advance in a memory of the clutch operation unit 52, for example. Then, the engine speed R is compared with a threshold value RL. The threshold value RL may have any hysteresis range, and the determination based on the comparison between the engine speed R and the threshold value RL is stabilized by the hysteresis range. When the engine speed R is equal to or less than the threshold RL (or less than the threshold RL) (no in step #02), the clutch switching control proceeds to step #11, which will be described later.
When the engine speed R is higher than the threshold RL (yes in step #02), the speed control flag FL is set to on (step # 03). The rotational speed control flag FL is a variable used for processing by the ECU of the clutch operation unit 52, and is used for the second rotational speed control described later. After the rotational speed control flag FL is set to on, the first rotational speed control is performed (step # 04). The "first rotation speed control" refers to control of reducing the engine rotation speed R so that the engine rotation speed R becomes equal to or less than the threshold RL (or less than the threshold RL). In the first rotation speed control, an instruction signal to lower the engine rotation speed R is transmitted from the clutch operation unit 52 to the engine control unit 56, and the engine control unit 56 controls the engine 8 so that the actual rotation speed of the engine 8 becomes equal to or lower than the threshold value RL (or less than the threshold value RL). The engine speed R changes over time, and determination as to whether the engine speed R is higher than the threshold RL is periodically repeated (step # 05). When the engine speed R is equal to or less than the threshold RL (or less than the threshold RL) (no in step #05), the first speed control of the engine speed R is ended, and the clutch switching control proceeds to step #11, which will be described later.
In step # 11, it is determined whether or not the rotational speed control flag FL has been set to on. When it is determined that the rotational speed control flag FL is on (yes in step # 11), the torque of the engine 8 may be unstable since this timing is immediately after the first rotational speed control is performed. In this state, for example, when the threshing clutch 23A is switched, the output of the engine 8 may be unstable at that timing. To avoid such a problem, the standby process shown in step # 12 to step #14 is executed. When the rotational speed control flag FL is off (no in step # 11), the clutch switching control proceeds to step #15, which will be described later.
In step # 12, the first wait timer Tw1 is started, and the determination in step # 13 is repeated until the first wait timer Tw1 completes the counting. The first wait timer Tw1 is a timing variable used in the processing of the ECU of the clutch operation unit 52. The time from the start of the counting by the first wait timer Tw1 in step # 12 to the completion of the counting by the first wait timer Tw1 in step # 13 is referred to as "first interval time". The first interval time is a time from completion of the first rotation speed control to start of the transmission switching operation, and is set as a waiting time for waiting for convergence of a change in the actual rotation speed in the engine 8 and stabilization of the torque of the engine 8 after the first rotation speed control is performed. The first interval time is stored in the memory of the clutch operating unit 52 and is a value that can be changed as appropriate. Of course, the first interval time may be zero, in which case the first waiting timer Tw1 immediately completes counting (step # 13: yes), and no waiting time is generated. When the first wait timer Tw1 finishes counting (YES in step # 13), the counting state of the first wait timer Tw1 is reset (step # 14).
In step # 15, the counting of the notification timer Tn is started. The notification timer Tn is a time variable used in the processing of the ECU of the clutch operation unit 52, and is used to set the end timing of the notification processing from step # 01. After the start of the timer Tn is notified, the transmission switching operation of the threshing clutch 23A is started (step # 16). Note that the start of the timer Tn in step # 15 and the start of the transmission switching operation to the threshing clutch 23A in step # 16 may be performed simultaneously.
In the first embodiment, the notification process by the notification unit 57 is completed before the transmission switching operation to the threshing clutch 23A is completed. Therefore, after the transmission switching operation to the threshing clutch 23A is started, it is determined whether or not the notification timer Tn has completed counting (step # 17). The completion count time of the notification timer Tn is set to a time shorter than the time required for the transmission switching operation of the threshing clutch 23A. The time counted by the notification timer Tn is stored in the memory of the clutch operating unit 52 and can be changed as appropriate.
When the notification timer Tn finishes counting (yes in step #17), the notification processing by the notification unit 57 is ended (step #18), and the count state of the notification timer Tn is reset (step # 19). Then, it is determined whether or not the transmission switching operation to the threshing clutch 23A is completed (step #20), and the processing from step # 17 to step #20 is repeated until the transmission switching operation to the threshing clutch 23A is completed. During this time, the operating wire across the threshing clutch 23A and the first clutch operating unit 52A is tensioned by the operation of the electric motor of the first clutch operating unit 52A, and the threshing clutch 23A is switched from the non-transmission state to the transmission state. Note that, when the determination of yes is made in step # 17, the processing of step # 18 and step # 19 is performed, and then the processing of step # 17 to step #20 is repeated, the notification timer Tn is not in the time counting state, and therefore step # 17 is inevitably determined as no. Further, although not shown in the flowchart, in the case where the transfer switching operation is completed (step # 20: yes) and the notification timer Tn is in counting, the notification processing of the notification section 57 is ended, and the counting state of the notification timer Tn is reset.
When the transmission switching operation to the threshing clutch 23A is completed (yes in step #20), it is determined whether the rotational speed control flag FL is set to on (step # 21). When the rotational speed control flag FL is off (no in step #21), the clutch switching control is terminated. When the rotational speed control flag FL is on (yes in step #21), the second rotational speed control is performed in the processes from step # 23 to step # 27. The "second rotation speed control" refers to control as follows: when the first rotation speed control is performed and the transmission switching operation is completed in a state where the engine rotation speed R becomes equal to or lower than the threshold RL (or smaller than the threshold RL), the engine rotation speed R is raised so as to be higher than the threshold RL. The engine speed R is restored by the second speed control.
After the rotation speed control flag FL is reset in step # 22, the second wait timer Tw2 is started (step #23), and the determination in step # 24 is repeated until the second wait timer Tw2 completes the counting. The second wait timer Tw2 is a timing variable used in the processing of the ECU of the clutch operation unit 52. The time from the start of the counting by the second waiting timer Tw2 in step # 23 to the completion of the counting by the second waiting timer Tw2 in step # 24 is referred to as "second interval time". The second interval time is a time from completion of the transmission switching operation to start of the second rotation speed control, and is set as a waiting time for converging the shock and vibration applied to the first belt 23 to stabilize the rotation state of the first belt 23. The second interval time is stored in the memory of the clutch operating means 52 and is a value that can be changed as appropriate. Of course, the second interval time may be zero, in which case the second waiting timer Tw2 immediately completes the counting (step # 24: yes), and no waiting time is generated. When the second wait timer Tw2 finishes counting (YES in step # 24), the counting state of the second wait timer Tw2 is reset (step # 25).
Note that the respective timings of the first wait timer Tw1, the second wait timer Tw2, and the notification timer Tn may be configured to be incremented from a zero value to a value of the completion count time. Further, the respective timings of the first wait timer Tw1, the second wait timer Tw2, and the notification timer Tn may be configured to decrease from the value of the completion timing time to a zero value. The respective completion count times of the first wait timer Tw1, the second wait timer Tw2, and the notification timer Tn are individually set.
In step # 26, the second rotational speed control is started, and the determination in step # 27 is repeated until the second rotational speed control is determined to be completed. During this period, the engine speed R changes with time, and the engine speed R and the set speed of the accelerator operation member 53 are periodically compared. In the second rotation speed control, an instruction signal for increasing the engine rotation speed R is transmitted from the clutch operation unit 52 to the engine control unit 56, and the engine control unit 56 controls the engine 8 so that the actual rotation speed of the engine 8 reaches the set rotation speed of the accelerator operation member 53. When the engine speed R reaches the set speed of the accelerator operation member 53, it is determined that the second speed control is completed (yes in step # 27), and the clutch switching control is ended.
In fig. 7 to 9, the engine speed R and the notification processing of the state notification unit 57 (see fig. 4, the same below) of the threshing clutch 23A (see fig. 4, the same below) are shown in the form of a time chart. In fig. 7 to 9, the non-transmission state and the transmission state of the threshing clutch 23A are indicated by horizontal lines, respectively, and the state in the process of performing the transmission switching operation on the threshing clutch 23A is indicated by inclined lines.
Fig. 7 shows a case where the transmission switching operation of the clutch operation unit 52 (see fig. 4, the same applies hereinafter) is performed when the engine speed R is always equal to or lower than the threshold value RL.
In the example shown in fig. 7, a determination of "no" is made in step # 02 based on the flowchart shown in fig. 5. Since the rotation speed control flag FL is not set to on, no is determined in step # 11, and no is also determined in step # 21. Therefore, the process of step # 01, the process of step # 15, and the process of step # 16 are performed substantially simultaneously. Therefore, the timing of starting the transmission switching operation to the threshing clutch 23A is substantially the same as the timing of starting the notification process by the notification unit 57.
In fig. 7, the timing at which the threshing clutch 23A starts to transition from the non-transmission state to the transmission state is the detection timing of the communication control signal. The process of step # 01 shown in fig. 5 and the processes of step # 15 and step # 16 shown in fig. 6 are performed substantially simultaneously at the detection timing of the communication control signal. In this way, when the engine speed R is equal to or less than the preset threshold value RL (or lower than the threshold value RL) when the clutch operation means 52 detects the communication control signal, the clutch operation means 52 immediately performs the transmission switching operation on the threshing clutch 23A.
Fig. 8 shows a case where the transmission switching operation of the clutch operation unit 52 is performed when the engine speed R is R1 that is higher than the threshold value RL. In this case, the set rotation speed of the accelerator operation member 53 (see fig. 4, the same applies hereinafter) is set to R1. Fig. 9 shows a case where the transmission switching operation of the clutch operation unit 52 is performed when the engine speed R is R2 that is higher than the threshold value RL. In this case, the set rotation speed of the accelerator operation member 53 is set to R2, and R2 is lower than R1.
In the examples shown in fig. 8 and 9, the processing of step # 01 to step #04 in fig. 5 is performed at the timing when the clutch operation unit 52 detects the communication control signal. In the example shown in fig. 8, the first rotational speed control is performed during a time Td1, and in the example shown in fig. 9, the first rotational speed control is performed during a time Td 2. In this way, when the engine speed R is higher than the threshold RL when the clutch operation unit 52 detects the communication control signal, the clutch operation unit 52 performs the first speed control and performs the transmission switching operation on the threshing clutch 23A in a state where the engine speed R is equal to or lower than the threshold RL (or lower than the threshold RL).
In the first rotation speed control shown in fig. 8, the engine rotation speed R is reduced from R1 to the threshold RL during the time Td 1. When the rate of change per unit time of the engine speed R in the first rotation speed control is defined as the first rate of change Rd, the first rate of change Rd is calculated according to the following equation in the example shown in fig. 8.
Rd＝(R1－RL)/Td1
Further, in the first rotation speed control shown in fig. 9, the engine rotation speed R is reduced from R2 to the threshold RL during the time Td 2. In the example shown in fig. 9, the first change rate Rd is calculated according to the following equation.
Rd＝(R2－RL)/Td2
The first rate of change Rd is represented by the degree of inclination of the curves of the engine speed R in fig. 8 and 9. The broken line of the graph shown in fig. 9 showing the engine speed R is obtained by superimposing the solid line of the graph shown in fig. 8 showing the engine speed R. As shown in fig. 9, the degree of inclination (broken line) of the curve of the engine speed R when the engine speed R is reduced from R1 to the threshold RL is the same as the degree of inclination (solid line) of the curve of the engine speed R when the engine speed R is reduced from R2 to the threshold RL. Therefore, as shown in the following equation, the first rate of change Rd is constant regardless of the engine speed R at the time when the clutch operation unit 52 detects the communication control signal.
Rd＝(R1－RL)/Td1＝(R2－RL)/Td2
In the examples shown in fig. 8 and 9, the first wait timer Tw1 is counted after the first rotation speed control is completed based on the processing of step # 12 and step # 13 shown in fig. 6, and the first interval time is represented by "Tw 1" in fig. 8 and 9. After the first interval time has elapsed, the transmission switching operation for the threshing clutch 23A is started based on the processing of step # 16 shown in fig. 6. After the transfer switching operation is completed, the timing of the second wait timer Tw2 is performed based on the processing of step # 23, step # 24, and the second interval time is represented by "Tw 2" in fig. 8 and 9.
After the second interval time has elapsed, the second rotation speed control is performed based on the process of step # 26 in fig. 6 in both the examples shown in fig. 8 and 9. In the example shown in fig. 8, the second rotation speed control is performed during time Ta1, and in the example shown in fig. 9, the second rotation speed control is performed during time Ta 2.
In the second rotation speed control shown in fig. 8, the engine rotation speed R is increased from the threshold RL to R1 during time Ta 1. When the rate of change per unit time of the engine speed R in the second rotation speed control is defined as a second rate of change Ru, the second rate of change Ru is calculated according to the following equation in the example shown in fig. 8.
Ru＝(R1－RL)/Ta1
Further, in the second rotation speed control shown in fig. 9, the engine rotation speed R is increased from the threshold RL to R2 during time Ta 2. In the example shown in fig. 9, the second change rate Ru is calculated according to the following equation.
Ru＝(R2－RL)/Ta2
The second rate of change Ru is represented by the degree of inclination of the curves of the engine speed R in fig. 8 and 9. Further, as shown in the following equation, the second rate of change Ru is constant.
Ru＝(R1－RL)/Ta1＝(R2－RL)/Ta2
The second change rate Ru may not be constant, and for example, the second change rate Ru may be changed in accordance with the set rotation speed of the accelerator operation member 53.
In the first embodiment, the first rate of change Rd is set to be smaller than the second rate of change Ru. In other words, the time Td1 is set longer than the time Ta1, and the time Td2 is set longer than the time Ta 2. When the crawler travel device 2 is being driven while the first rotation speed control is being executed, it is conceivable that the actual rotation speed of the engine 8 is rapidly reduced by the driving load of the crawler travel device 2. In such a case, there is a risk that the crawler travel device 2 may suddenly decelerate to cause the worker to be surprised or feel unpleasant. According to this configuration, since the engine speed R is gradually reduced based on the first change rate Rd, the crawler travel device 2 is gradually reduced without an urgent reduction. Therefore, the risk that the operator is surprised or unpleasant when the first rotation speed control is executed is greatly reduced.
The first interval time is a time for waiting for the output of the engine 8 (see fig. 3, the same below) to stabilize immediately after the first rotational speed control is completed, and the second interval time is a time for waiting for the convergence of the shock and vibration applied to the first belt 23 (see fig. 4, the same below) immediately after the transmission switching operation is completed. As described above, since the engine speed R gradually decreases in the first speed control, the output of the engine 8 immediately after the first speed control is completed is more quickly stabilized than in the case where the convergence of the shock and vibration of the first belt 23 is waited for after the transmission switching operation is completed. Therefore, in the first embodiment, the first interval period shown by "Tw 1" in fig. 8 and 9 is set to be shorter than the second interval period shown by "Tw 2" in fig. 8 and 9. In other words, the second interval period shown by "Tw 2" in fig. 8 and 9 is set to be longer than the first interval period shown by "Tw 1" in fig. 8 and 9. The second interval time is set to, for example, 0.7 seconds. The first interval time is set to 0 to 0.3 seconds, for example, and may be zero.
The set time to be counted by the notification timer Tn is represented by the interval time of "Tn" in fig. 7 to 9, and the notification process is switched from "on" to "off" at the timing when the counting of the notification timer Tn is completed. The set time to be counted by the notification timer Tn is a set time set in advance from the start of the transmission switching operation of the threshing clutch 23A. That is, as shown in fig. 7 to 9, the notification portion 57 continues to perform the notification relating to the transmission switching operation at the time when the clutch operation unit 52 detects the communication control signal and at the time when a preset set time has elapsed since the transmission switching operation was started.
At the timing when the notification process is switched from "on" to "off", the transmission switching operation to the threshing clutch 23A is not yet completed. That is, the set time to be counted by the notification timer Tn is set to the time before the transfer switching operation is completed. For example, if the time required from the start of the transfer switching operation to the completion thereof is 1.3 seconds, the set time to be counted by the notification timer Tn is set to, for example, 1 second. Then, the notification unit 57 stops the notification when the set time has elapsed since the timer Tn was counted. Therefore, the notification by the notification unit 57 does not continue all the time, and the risk that the operator feels unpleasant to the notification is reduced.
[ other embodiments of the first embodiment ]
The present invention is not limited to the structure exemplified in the first embodiment described above, and other representative embodiments of the present invention will be described below by way of example.
(1-1) in the first embodiment described above, the clutch operation means 52 is shown as an example of the configuration for performing the transmission switching operation of the threshing clutch 23A, but the "working clutch" according to the present invention may be the cut-off clutches 40A, 41A and the discharge clutch 50A. When the detaching clutch 40A is the "operating clutch" of the present invention, the "belt" of the present invention is the detaching belt 40. In addition, when the separation clutch 41A is the "operation clutch" of the present invention, the "belt" of the present invention is the separation belt 41. In addition, when the discharge clutch 50A is the "operation clutch" of the present invention, the "transmission belt" of the present invention is the discharge transmission belt 50.
(1-2) in the first embodiment described above, the clutch operating means 52 performs the second rotational speed control when the first rotational speed control is performed and the transmission switching operation is completed in a state where the engine rotational speed R is equal to or lower than the threshold value RL, but the present invention is not limited to this first embodiment. For example, the clutch operating unit 52 may be configured to perform the selective setting so as not to perform the second rotation speed control.
(1-3) in the first embodiment described above, the clutch operating means 52 performs the second rotational speed control so that the engine rotational speed R reaches the set rotational speed of the accelerator operating member 53, but is not limited to this first embodiment. For example, it may be configured such that: in step # 03 shown in fig. 6, the engine rotational speed R at that timing is stored in the memory of the clutch operation unit 52 while the rotational speed control flag FL is set to on. In this case, the following structure may be adopted: in the second rotation speed control, the engine control unit 56 controls the engine 8 so that the actual rotation speed of the engine 8 reaches the engine rotation speed R stored in step # 03. Further, the following structure may be adopted: in step # 27, when the engine speed R reaches the engine speed R stored in step # 03, it is determined that the second speed control is completed, and the clutch switching control is ended.
(1-4) in the first embodiment described above, the engine speed R is decreased in proportion to time based on the first rate of change Rd in the first speed control, but the present invention is not limited to this first embodiment. For example, it may be configured such that: in the first rotational speed control, the engine rotational speed R is reduced in a sigmoid curve by control based on a known minimum acceleration model or the like. Further, for example, it may be configured such that: in the second rotation speed control, the engine rotation speed is increased from the S-curve shape by control based on a known minimum acceleration model or the like.
(1-5) in the first embodiment described above, the first interval time is provided as the time from completion of the first rotation speed control to the start of the transmission switching operation, but the first interval time may not be provided.
(1-6) in the first embodiment described above, the notification unit 57 notifies the transmission switching operation from the time when the clutch operation unit 52 detects the communication control signal to the time before the completion of the transmission switching operation, but the present invention is not limited to this first embodiment. For example, it may be configured such that: the set time to be counted by the notification timer Tn is set to the time after the transfer switching operation is completed. Further, it may be configured such that: after the completion of the counting by the notification timer Tn, the notification unit 57 also performs some kind of notification.
(1-7) in the first embodiment described above, the second interval period is the period counted by the second wait timer Tw2 and is the period from the completion of the transmission switching operation to the start of the second rotational speed control, but the present invention is not limited to this first embodiment. For example, the count time of the second wait timer Tw2 may be set to a time period from the start of the transmission switching operation to the start of the second rotational speed control. In this case, the count time of the second wait timer Tw2 may be set to be longer than the time required for the transfer switching operation. Of course, the count time of the second waiting timer Tw2 may be set to be longer than the count time of the notification timer Tn. In this case, for example, the following configuration may be adopted: if the time required from the start of the transfer switching operation to the completion is 1.3 seconds, the set time to be counted by the notification timer Tn is set to 1 second, for example, and the count time of the second waiting timer Tw2 is set to 2 seconds, for example.
The structure disclosed in the first embodiment (including other embodiments of the first embodiment, and the same applies hereinafter) may be used in combination with the structure disclosed in other embodiments as long as no conflict occurs. The first embodiment disclosed in the present specification is an example, and the present invention is not limited to this, and can be appropriately modified within a range not departing from the object of the present invention. The invention disclosed in the first embodiment described above relates to a work vehicle. The invention disclosed in the first embodiment can be applied to a tractor, a paddy field working machine, a backhoe, and the like, to which a working device such as a semi-feeding type combine harvester, a corn harvester, a tilling device, and the like is attached, in addition to the above-described general type combine harvester.
[ second embodiment ]
A second embodiment of the harvester according to the present invention will be described below with reference to fig. 10 to 18. The second embodiment shows an example of the present invention for solving the above-described [ second technical problem ].
[ integral structure of combine harvester of second embodiment ]
A whole-feed combine harvester (corresponding to the "harvester" of the present invention) is shown in fig. 10. The combine harvester is provided with a machine body frame 101 and a crawler belt traveling device 102. A cutting part 103 is arranged in front of the machine body, which harrows the vertical grain stalks and cuts the grain stalks. The cutting unit 103 includes: a raking drum 104 for raking and planting vertical grain stalks; a cutter 105 for cutting off the vertical straw; raking the grain stalks into the raking spiral pusher 106; and a cutting frame 107 for supporting the above members. The front ends of the left and right sides of the harvesting frame 107 are respectively provided with a divider 108 for dividing standing grain stalks.
A driver 109 is provided at the front of the body. A threshing device 110 for threshing the whole straw from which the grain straw is cut is provided. A feeder 111 for conveying the harvested straws to the threshing device 110 is provided so as to straddle the harvesting unit 103 and the threshing device 110. The feeder 111 is supported at the front of the threshing device 110 so as to be swingable up and down. A hydraulic cylinder 112 for swinging the feeder 111 up and down is provided so as to straddle the feeder 111 and the machine body frame 101. A grain tank 113 for storing grains obtained by the threshing process of the threshing device 110 is provided on the right side of the threshing device 110. A grain discharging device 114 is provided for discharging grains in the grain tank 113.
[ Rake roll of the second embodiment ]
As shown in fig. 11 to 14, the rake drum 104 includes left and right support arms 115, a rake drum drive shaft 116, left and right drum frames 117, a plurality of support rods 118 (corresponding to "support members" of the present invention), a plurality of tines 119, and a tine posture holding mechanism 120.
A coupling shaft 121 that couples the base end portions of the left and right support arms 115 is provided so as to straddle the base end portions of the left and right support arms 115. The left and right support arms 115 are supported by the rear portion of the cutting frame 107 via a connecting shaft 121 so as to be swingable up and down. A raking drum drive shaft 116 is provided so as to straddle the distal end portions of the left and right support arms 115, and power for raking and driving the raking drum 104 is input to the raking drum drive shaft 116. A belt transmission mechanism 122 for transmitting power to the raking roll driving shaft 116 is coupled to the right end of the raking roll driving shaft 116. Hydraulic cylinders 123 (see fig. 10) for vertically swinging the support arm 115 are provided so as to straddle the left support arm 115 and the left side portion of the cutting frame 107 on the left side and straddle the right support arm 115 and the right side portion of the cutting frame 107 on the right side, respectively.
The left and right reel frames 117 are rotationally driven in the direction of arrow a about a rotational axis X1 extending in the left-right direction of the machine body. The left roll frame 117 is supported at the left end of the rake roll drive shaft 116. The right spool frame 117 is supported at the right end of the raking spool drive shaft 116. The spool frame 117 is formed in a substantially pentagonal shape in side view. The reel frame 117 includes: a frame main body 124 having five arm portions 124 a; and a strip-shaped plate material 125 wound around the tip end portions of the five arm portions 124 a.
The support rod 118 is a round rod-shaped support member extending in the left-right direction of the machine body. The support rod 118 is provided so as to straddle the tip end portions of the five arm portions 124a of the respective left frame bodies 124 and the tip end portions of the five arm portions 124a of the respective right frame bodies 124. That is, a plurality of support rods 118 (five in the second embodiment) are provided so as to straddle the left and right spool frames 117.
The tine posture holding mechanism 120 holds the tines 119 in a posture of extending downward from the support bar 118. The fork posture holding mechanism 120 includes: an auxiliary reel frame 126 rotatable about a rotation axis X2 parallel to the rotation axis X1; and a link 127 coupling the auxiliary spool frame 126 with the support bar 118. The auxiliary reel frame 126 is formed in a substantially pentagonal shape in side view. The auxiliary reel frame 126 includes: a frame main body 128 having five arm portions 128 a; and a strip-shaped plate member 129 wound around the tip end portions of the five arm portions 128 a. A link 127 is provided so as to straddle the distal end portion of each arm portion 128a of the frame main body 128 and each support rod 118.
The auxiliary reel frame 126 rotates about the rotation axis X2, whereby the support rod 118 is rotationally operated via the link 127. Thus, the fork 119 is held in a posture of extending downward from the support rod 118 regardless of the rotation of the reel frame 117.
[ tine of the second embodiment ]
A plurality of tines 119 are attached to the support bar 118 at intervals in the left-right direction of the machine body. The fork 119 includes: a plurality of outer tines 130 located at the left and right ends of the support bar 118; and a plurality of inside tines 131 (corresponding to the "tines" of the present invention) located further inboard than the outside tines 130. The outer tine 130 is formed of a round bar material having a larger outer diameter than the inner tine 131 and has a higher bending strength than the inner tine 131.
As shown in fig. 15-18, the inner tine 131 is constructed of a round bar material having a smaller outer diameter than the outer tine 130 and has a lower bending strength than the outer tine 130. The inner tine 131 includes: a support portion 131a, a spring portion 131b, an action portion 131c, and an extension portion 131 d. The support portion 131a is supported by the support rod 118. The spring portion 131b is located below the support rod 118. The action portion 131c is provided in a state of hanging from the spring portion 131b, and performs a raking action on the standing grain straw. The extending portion 131d extends so as to straddle the support portion 131a and the spring portion 131 b.
In the second embodiment, the inner tine 131 includes one support portion 131a, left and right spring portions 131b, left and right acting portions 131c, and left and right extending portions 131 d. The left and right spring portions 131b are disposed so as to be distributed left and right with respect to the one support portion 131 a. The left extension 131d extends so as to straddle the one support 131a and the left spring 131 b. The right extension 131d extends over the one support 131a and the right spring 131 b. The left acting portion 131c corresponds to the left spring portion 131 b. The right acting portion 131c corresponds to the right spring portion 131 b. The inner tine 131 is formed in a left-right symmetrical shape with respect to the left-right center C1 thereof.
The support portion 131a is fixed to the outer peripheral portion of the support rod 118 by bolts 132 in a state of being placed on the upper surface of the support rod 118. The support portion 131a includes a recess that opens rearward so that the bolt 132 can pass therethrough in the vertical direction. The support rod 118 is formed with a hole 118a through which the bolt 132 is inserted. The bolt 132 is inserted into the hole 118a from above the support portion 131 a. A flat washer 133 is fitted around the bolt 132 between the head 132a and the support 131 a. A nut 134 is attached to a portion of the bolt 132 that protrudes downward from the support rod 118.
In the second embodiment, the spring portion 131b is formed by winding three turns around an axial center parallel to the support rod 118. The spring portion 131b is located forward and downward of the support rod 118. The inner tines 131 are formed in a shape that reaches the spring portions 131b from above the support rod 118 through the rear of the support rod 118. The acting portion 131c is formed in a shape that extends forward and downward from the spring portion 131b and is bent rearward and downward. The extension 131d is formed in a shape that extends from the support portion 131a to the spring portion 131b through the support rod 118.
[ cover Member of the second embodiment ]
As shown in fig. 15 to 18, a cover member 135 is attached to the support rod 118. The cover member 135 is formed from a single elongate member that covers a plurality of tines 119. The cover member 135 has a left-right length that spans both left and right ends of the support bar 118 (specifically, a left-right length between the outer tine 130 located at the leftmost end and the outer tine 130 located at the rightmost end among the plurality of tines 119). The cover member 135 includes a fitting portion 136, a first cover portion 137 (corresponding to the "cover portion" of the present invention), and a second cover portion 138 (corresponding to the "portion covering the head portion of the bolt" of the present invention). The fitting portion 136 is fitted to the outer peripheral portion of the support rod 118. The first cover portion 137 extends downward past the rear of the spring portion 131b, and covers the spring portion 131b from the rear. Second cover portion 138 is provided continuously with fitting portion 136, and covers head portion 132a of bolt 132. The fitting portion 136, the first cover portion 137, and the second cover portion 138 are formed to extend over the entire left and right lengths of the cover member 135.
The fitting portion 136 is formed in an arc shape along the shape of the outer peripheral portion of the support rod 118. The fitting portion 136 is fitted to the front portion of the outer peripheral portion of the support rod 118. Specifically, the fitting portion 136 is fitted to a portion of the outer peripheral portion of the support rod 118 on the front side of the hole 118 a. The upper end 136a of the fitting portion 136 enters a gap between the distal end of the support portion 131a and the outer peripheral portion of the support rod 118. The lower end 136b of the fitting portion 136 enters the gap between the nut 134 and the outer peripheral portion of the support rod 118.
The first cover 137 extends downward in contact with the rear portion of the inner tine 131. Specifically, the first cover portion 137 extends downward below the lower end of the fitting portion 136 to a height position below the lower end of the spring portion 131b in a state of being in contact with the rear portion of the spring portion 131b and the rear portion of the extension portion 131 d. The first cover portion 137 is inclined forward and downward along the rear portion of the spring portion 131b and the rear portion of the extension portion 131d in side view.
[ supporting bracket of second embodiment ]
The support bracket 139 is formed of a bent plate material. The support bracket 139 includes a mounting portion 139a, a pressing portion 139b, and an engaging portion 139c (corresponding to the "second engaging portion" of the present invention).
The mounting portion 139a is formed with a hole 139d through which the bolt 132 is inserted. A nut 140 is attached to a portion of the bolt 132 projecting downward from the attachment portion 139 a. That is, the support bracket 139 is fixed to the outer peripheral portion of the support rod 118 together with the support portion 131a by the bolt 132.
The pressing portion 139b is provided in a state of rising from the distal end portion of the mounting portion 139 a. The pressing portion 139b presses the fitting portion 136 from the opposite side (front side) of the support rod 118 in side view (in cross-sectional view of the support rod 118). The upper end of the pressing portion 139b is located at a height position above the center X3 of the support rod 118 in a side view.
The engaging portion 139c is provided in a state of hanging from the rear end portion of the mounting portion 139 a. Here, in the cover member 135, an engaging portion 137a (corresponding to a "first engaging portion" in the present invention) is formed in an inner surface portion (a surface portion on the side opposite to the spring portion 131b) of the first cover portion 137 so as to extend over the entire length of the cover member 135 in the right and left direction. The engaging portion 137a is formed in a groove shape in a side view. By inserting the engaging portion 139c of the support bracket 139 into the engaging portion 137a of the cover member 135, the engaging portion 137a of the cover member 135 engages with the engaging portion 139c of the support bracket 139. That is, the support bracket 139 is fixed to the outer peripheral portion of the support rod 118 by the bolt 132 in a state where the engagement portion 137a of the cover member 135 is engaged with the engagement portion 139c of the support bracket 139.
[ other embodiments of the second embodiment ]
(2-1) in the second embodiment described above, the inner tine 131 includes one support portion 131a, left and right spring portions 131b, left and right extending portions 131d, and left and right acting portions 131 c. However, the inner tine 131 may be arranged to include one support portion 131a, one spring portion 131b, and one action portion 131 c.
(2-2) in the second embodiment described above, the spring portion 131b is formed by a spring portion wound three times. However, the spring portion 131b may be formed of a spring portion wound two times or one time.
(2-3) in the second embodiment described above, the cover member 135 includes the second cover portion 138. However, the cover member 135 may not include the second cover portion 138.
(2-4) in the second embodiment described above, the inner tine 131 is formed in a shape that passes behind the retainer bar 118 and reaches the spring portion 131 b. However, the inner tines 131 may be formed in a shape that reaches the spring portions 131b through the front of the support rod 118.
(2-5) in the second embodiment described above, the fitting portion 136 is fitted to the front portion of the outer peripheral portion of the support rod 118. However, the fitting portion 136 may be fitted to a rear portion, an upper portion, or a lower portion of the outer peripheral portion of the support rod 118.
(2-6) in the second embodiment, the first cover 137 extends downward in contact with the rear portion of the inner tine 131 (spring portion 131 b). However, the first cover 137 may extend downward in contact with the front portion of the inner tine 131 (spring portion 131 b).
(2-7) in the second embodiment, the first cover 137 extends downward to a height lower than the lower end of the spring 131 b. However, the first cover portion 137 may not extend downward to a height lower than the lower end of the spring portion 131 b. For example, the first cover portion 137 may extend downward to a height above the lower end of the spring portion 131 b. Alternatively, the first cover portion 137 may extend downward to the same height as the lower end of the spring portion 131 b.
(2-8) in the second embodiment described above, the support bracket 139 is fixed to the outer peripheral portion of the support bar 118 by the bolt 132 common to the inner tines 131. However, the support bracket 139 may be fixed to the outer peripheral portion of the support rod 118 by a bolt different from the bolt 132.
(2-9) in the second embodiment described above, the support bracket 139 is attached to the support rod 118 between the left and right spring portions 131b of one of the inner tines 131. However, the support bracket 139 may be attached to the support bar 118 between adjacent inner tines 131.
(2-10) in the second embodiment, the support bracket 139 is fixed to the outer peripheral portion of the support rod 118 by the bolt 132 in a state where the engagement portion 137a of the cover member 135 is engaged with the engagement portion 139c of the support bracket 139. However, the cover member 135 and the support bracket 139 may not include the engagement portion 137a and the engagement portion 139c, respectively.
(2-11) in the second embodiment, the support bracket 139 is provided with the pressing portion 139 b. However, the support bracket 139 may not include the pressing portion 139 b. In this case, for example, the cover member 135 may be covered with a front-rear halved cover member from above the cover member 135 and fastened in the front-rear direction, so that the cover member 135 is prevented from falling off from the support rod 118.
(2-12) in the second embodiment described above, the support bracket 139 is provided. However, the support bracket 139 may not be provided.
(2-13) in the second embodiment described above, the lower portions of the cover member 135 located on the left and right sides are supported by the support bracket 139, respectively. Alternatively or simultaneously, the lower portion of the cover member 135 located at the center between the right and left portions may be supported by the support bracket 139.
(2-14) in the second embodiment described above, the cover member 135 is constituted by a single elongate member covering a plurality of tines 119. However, the cover member 135 may be disposed so as to be left-right separable into two or more members.
The structure disclosed in the second embodiment (including other embodiments of the second embodiment, and the same applies hereinafter) may be used in combination with the structure disclosed in the other embodiments as long as no conflict occurs. The second embodiment disclosed in the present specification is an example, and the present invention is not limited to this, and can be appropriately modified within a range not departing from the object of the present invention. The invention disclosed in the second embodiment can be applied to a corn harvester in addition to a full-feed type combine harvester.
[ third embodiment ]
A third embodiment of the working machine according to the present invention will be described below with reference to fig. 19 to 28. The third embodiment shows an example of the present invention for solving the above-described [ third technical problem ].
[ integral Structure of third embodiment ]
A conventional combine harvester is shown in fig. 19. The travel machine body of the combine harvester includes a machine body frame 201 and a crawler travel device 202. A harvesting part 203 for harvesting the vertical grain stalk in the farmland is arranged in front of the running machine body. The harvesting unit 203 includes: raking the reel 204 and raking the planted vertical grain stalks; cutting the vertical grain stalks by a cutter 205; and an auger 206 for feeding the harvested stalks laterally to converge in the harvesting width direction and feed the harvested stalks rearward.
A driver 207 is provided behind the harvesting unit 203. The cab 207 is covered with a cab 208. A grain tank 209 for storing grains obtained by the threshing process is provided behind the driving unit 207. A threshing device 210 for threshing the whole straw from which the grain straw is cut is provided in a state of being horizontally aligned with the grain tank 209. The grain tank 209 is disposed so as to be rotatable around an axial center Y1 extending in the vertical direction at the rear of the grain tank 209 between an open position protruding to the right side and a closed position located behind the driver 207. The feeder 211 is provided so as to straddle the harvesting unit 203 and the threshing device 210 and conveys the whole stalks harvested from the grain stalks to the threshing device 210. The driving unit 207 includes a driving seat 212 and an operation panel 213 provided with various operation elements. A power unit 215 is provided below the driver unit 207.
[ Power section of third embodiment ]
As shown in fig. 21 to 24, the power unit 215 includes an engine 216, an engine-cooling radiator 217, a cooling fan 218, a fan cowl 219, and the like. The radiator 217 cools the engine 216, and the cooling fan 218 takes in outside air to cool the radiator 217. The fan cowling 219 guides the outside air from the radiator 217 to the cooling fan 218.
As shown in fig. 20 and 22, an engine cover 221 is provided, and engine room 220 is formed by engine cover 221 covering the upper side of engine 216. The engine cover 221 supports the driver seat 212 from below and is open laterally outward. Radiator 217 is provided laterally outside engine 216 in engine compartment 220. The cooling fan 218 is provided on the lateral inner side of the radiator 217 in the engine room 220.
The lateral outer side of the engine room 220 is covered with a dust-proof case 222 located on the outer side of the engine body with respect to the radiator 217. The dust-proof case 222 is provided with a dust-proof net 223 on the lateral outer surface thereof, and the dust-proof net 223 has air permeability and prevents dust from passing therethrough.
The rear end portion of the dust-proof case 222 is supported by the support frame 225 so as to be swingable about the vertical axis Y2 via a hinge 224. The support frame 225 is formed into a frame shape so as to substantially follow the outer peripheral portion of the dust cover 222, and is fixed to the heat sink frame 226. Dust-proof case 222 can swing between a closed posture in which the outside of the body of engine room 220 is covered and an open posture in which the outside of the body of engine room 220 is opened (see the imaginary line in fig. 20) by swinging around vertical axis Y2.
The cooling fan 218 takes in outside air through the dust-proof case 222 in a closed position to cool the heat sink 217. A fan shroud 219 is provided between the radiator 217 and the cooling fan 218, and the fan shroud 219 guides outside air so that the cooling air generated by the cooling fan 218 efficiently passes through the radiator 217. Fan cowling 219 is provided so as to straddle cooling fan 218 and radiator 217 while surrounding the outer periphery of the air intake space between cooling fan 218 and radiator 217.
Although not shown, the transmission mechanism that transmits the power of the engine 216 to the cooling fan 218 includes a rotational direction switching mechanism that can switch the rotational direction of the cooling fan 218 forward or backward. In the normal rotation state, the cooling fan 218 takes in outside air through the dust cover 222 to cool the radiator 217. In the reverse rotation state, the cooling fan 218 blows air laterally outward, and can blow off dust adhering to the dust screen 223 of the dust-proof case 222. When the reverse rotation operation of the cooling fan 218 is repeated, dust may adhere to and accumulate on the inner side of the body of the radiator 217.
The heat sink 217 has a cooling surface 217A having a rectangular shape in side view, and the outside air taken in by the cooling fan 218 through the dust-proof case 222 passes through the cooling surface 217A to perform a cooling function. A cooling fan 229 for cooling combustion air for the engine 216 with cooling air is provided near the cooling surface 217A of the radiator 217.
As shown in fig. 21 and 22, an exhaust port 231 of the air filter 230 provided behind the driver seat 212 and a suction port of a compression portion 232a of a supercharger 232 provided in an upper portion of the engine 216 are connected via a supercharger suction pipe 233. As shown in fig. 22 and 23, the discharge port of the compression part 232a of the supercharger 232 and the introduction port 229a of the air-cooling fan 229 are connected through a supply pipe 234. An outlet 229b of air cooler 229 is connected to an intake portion of engine 216 via an engine suction pipe 235. The suction portion of the turbine portion 232b of the supercharger 232 is connected to an exhaust manifold 237 of the engine 216, and the exhaust pipe 238 is connected to the exhaust portion of the turbine portion 232b of the supercharger 232.
An exhaust gas purification device 239 is provided above the engine 216, and the exhaust gas purification device 239 performs a purification process of the exhaust gas so as to reduce diesel particulates contained in the exhaust gas of the engine 216 by a trap filter (not shown). The front portion of the exhaust gas purification device 239 is supported by a coupling flange 241 provided in the exhaust pipe 238 via a support bracket 240 shaped like an L in side view.
The position of the connection portion of the supply pipe 234 with respect to the supercharger 232 is held by the support bracket 240. As shown in fig. 28, a mounting plate 242 is integrally provided on the right end of the support bracket 240 in the front-rear direction. The supply pipe 234 is held by sandwiching bolts at both sides of a holding member 243 to be fastened to the mounting plate 242. The holding member 243 holds the supply pipe 234, and the supply pipe 234 is held so as not to fall off by friction.
The supporting structure of the heat sink 217 will be described. As shown in fig. 21 to 25, the heat sink 217 is supported by a heat sink frame 226 as a support frame. The heat sink frame 226 covers the air intake space between the heat sink 217 and the dust-proof case 222, and is formed in a rectangular frame shape along the outer periphery of the heat sink 217 so as to guide the outside air having passed through the dust-proof case 222 to the cooling surface 217A. That is, as shown in fig. 25, the heat sink frame 226 has a lower frame portion 245, front and rear frame portions 246 and 247, and an upper frame portion 248, and is rectangular in side view so as to extend along the outer periphery of the heat sink 217. The bottom of the heat sink frame 226 is supported by the body frame 201.
The heat sink frame 226 includes a mounting support portion 249, and the mounting support portion 249 projects laterally inward from the lower frame portion 245. The mounting support 249 is formed of a horizontally oriented plate-like body that is long in the front-rear direction and narrow in the left-right direction. A stopper 250 is provided at the front end of the mounting support 249, and the stopper 250 prevents the heat sink 217 mounted on the mounting support 249 from falling forward. The rear end of the placement support portion 249 is not provided with a member for stopping and blocking, and the rear end of the placement support portion 249 is open. Therefore, the worker can take out the radiator 217 rearward. The mounting support 249 has a rib 251 on the lower side of the rear end portion.
As shown in fig. 24 and 25, the placement support 249 has two engagement holes 253 formed therein. Two locking pins 252 protrude downward from the lower portion of the heat sink 217 at two positions in the front and rear direction. The two engagement pins 252 enter the engagement holes 253, respectively, to prevent the heat sink 217 from being displaced, and the heat sink 217 is placed on and supported by the placement support 249. The upper portion of the heat sink 217 is coupled to the upper frame portion 246 of the heat sink frame 226 via coupling brackets 254 at two front and rear positions.
As shown in fig. 21, a large opening 255 is formed in the rear portion of the engine room 220 so that the radiator 217 can be taken out rearward. When the worker removes the radiator 217 for maintenance work, the worker can slide the radiator 217 supported by the placement support portion 249 rearward from the opening 255 in the rear portion of the engine room 220, as shown by the imaginary line in fig. 20. At this time, the radiator 217 slides the upper surface of the placement support 249 rearward along the cooling surface 217A. When the worker detaches the radiator 217, the grain tank 209 needs to be opened to the open position, the pipe 256 for circulating the cooling water needs to be detached, and the connection bracket 254 needs to be disconnected. The operator moves the heat sink 217 while sliding relative to the placement support 249 in a state where the engagement between the engagement pin 252 and the engagement hole 253 is released.
As shown in fig. 24 and 25, a cleaning port 257, which is an opening penetrating vertically, is formed in the frame-shaped portion 245 at the lower portion of the radiator frame 226, and a lid 258 capable of opening and closing the cleaning port 257 is provided. The frame-shaped portion 245 has a vertical surface portion 245a for fixing the support frame 225 of the dust-proof case 222 on the left-right outer side and a vertical surface portion 245b for fixing the placement support portion 249 on the left-right inner side, and is formed in a U-shape in cross section when viewed in the front-rear direction. Therefore, if dust accumulates inside the lower frame-shaped portion 245, cleaning is difficult. Therefore, the cleaning port 257 is configured to remove dust.
As shown in fig. 26, the lid 258 engages with a two-forked insertion portion 259 provided at the rear end portion thereof by being inserted into the inner edge of the rear end of the cleaning port 257, and the front and rear center portions and the front end portion of the lid 258 are bolted to the peripheral edge portion of the cleaning port 257 of the lower frame-shaped portion 245. When the worker releases the bolt connection, the cover 258 can be easily removed.
Next, the fan cowling 219 will be described. Fan cowling 219 is provided so as to straddle cooling fan 218 and radiator 217 while surrounding the outer periphery of the air intake space between cooling fan 218 and radiator 217. As shown in fig. 25 and 27, the fan cowling 219 includes: an upper part 219a covering an upper side of the air suction space; a lower part 219b covering the lower side of the suction space; a rear part 219c covering the rear side of the air intake space; a front part 219d covering the front side of the air intake space; and a vertical wall part 219e covering the left side surface (cooling fan 218 side) of the air intake space. The rear side corresponds to the near side in the taking-out direction of the heat sink 217, and the rear side 219c corresponds to a "near side" covering the near side in the taking-out direction of the air intake space. The front part 219d corresponds to a "depth part" covering the depth side in the taking-out direction of the air-intake space.
The upper part 219a is set in a horizontal posture. The lower part 219b is set in an inclined posture in which it is positioned more upward toward the left side. The rear part 219c is inclined toward the left side and positioned on the front side. The front part 219d is inclined toward the left side and positioned rearward. The right end portion of the fan cowling 219 is formed in a rectangular shape surrounding the outer periphery of the radiator 217, and the air intake space surrounded by the fan cowling 219 gradually becomes narrower toward the left side (cooling fan 218 side) along the front-rear direction and the vertical direction. With this arrangement, the cooling air passing through the air intake space is favorably guided to the cooling fan 218 side.
The vertical wall 219e is formed with an air intake opening 260 through which the cooling fan 218 draws air. The air intake opening 260 is circular and has a large diameter close to the substantially full width of the vertical wall part 219e in the vertical direction. A peripheral wall 261 protruding toward the cooling fan 218 is formed on an inner edge of the air intake opening 260. The cooling fan 218 is provided in a state of entering the peripheral wall portion 261. The air intake opening 260 corresponds to an "opening" formed laterally inside the dust cover 222.
In this case, the vertical wall part 219e of the fan cowl 219 is divided into a left vertical wall part 219e1 on the left side and a right vertical wall part 219e2 on the right side at a substantially right-left center position. The left-side vertical wall portion 219e1 corresponds to a "near-side vertical wall portion" located near the front side in the removal direction. The right vertical wall part 219e2 corresponds to a "depth-side vertical wall part" located on the depth side in the removal direction.
An upper portion 219a, a lower portion 219b, and a rear portion 219c of the fan cowl 219 are integrally formed. The left vertical wall part 219e1 is screwed to the integrally formed upper part 219a, lower part 219b, and rear part 219 c. The right longitudinal wall portion 219e2 and the front side portion 219d are integrally formed.
Therefore, the fan cowl 219 is configured such that the upper part 219a, the lower part 219B, the rear part 219c, and the fixed left vertical wall part 219e1 form a partial split B1, the integrally formed right vertical wall part 219e2 and the front part 219d form another split B2, and the fan cowl 219 is circumferentially divided into two split bodies B1 and B2.
In the peripheral wall 261, flange connection portions 263 that can be connected by bolts are formed at two positions above and below the boundary 262 between the left vertical wall portion 219e1 and the right vertical wall portion 219e 2. The flange connection portion 263 is disposed to be able to abut in the front-rear direction and to be able to perform bolt connection and connection release in the front-rear direction. Although not shown, the overlapping portions of the two divided bodies B1 and B2 are fixed by a plurality of screws. The plurality of screws can also be removed.
A part of the divided body B1 is supported by the heat sink 217, and the other divided body B2 is separated from the heat sink 217. The upper surface of the upper part 219a and the lower surface of the lower part 219b are provided with mounting brackets 264 at intervals in the front-rear direction. Each mounting bracket 264 is coupled to a mounting portion 265 provided on the heat sink 217 by a bolt in a state where the fan cowling 219 is at an appropriate mounting position. The other divided body B2 is separated from the heat sink 217, but can be connected to a part of the divided body B1 attached to the heat sink 217 by the upper and lower flange connection parts 263.
A part of the divided body B1 can be integrally taken out rearward along the direction in which the heat sink 217 is taken out. When a part of the divided body B1 is taken out, the connection of the upper and lower flange connection parts 263 is simply released, and the other divided body B2 is laid down on the spot without a supporting member. Further, a part of the split body B1 can be taken out rearward without interfering with the cooling fan 218. The worker can take out a part of the divided body B1 at the same time as taking out the heat sink 217. The operator can remove only a part of the divided body B1 by simply releasing the connection between the part of the divided body B1 and the heat sink 217.
[ other embodiments of the third embodiment ]
The present invention is not limited to the configuration exemplified in the third embodiment described above, and other exemplary embodiments of the present invention are described below by way of example.
(3-1) in the third embodiment described above, the left vertical wall part 219e1 is fixed by screws, but the left vertical wall part 219e1 may be integrally formed with the upper part 219a, the lower part 219b, and the rear part 219 c.
(3-2) in the third embodiment described above, the right vertical wall part 219e2 and the front part 219d are integrally formed, but instead of this structure, the right vertical wall part 219e2 and the front part 219d may be detachably coupled.
(3-3) in the third embodiment described above, the other divided body B2 is separated from the heat sink 217, but instead of this structure, a structure may be adopted in which the other divided body B2 is supported by the heat sink 217.
(3-4) in the third embodiment described above, the fan cowl 219 is divided into the partial divided body B1 and the other divided body B2, but instead of this configuration, a configuration may be adopted in which the fan cowl is divided into three or more divided bodies.
(3-5) in the third embodiment, the cleaning port 257 (opening) penetrating vertically is formed in the lower frame-shaped portion 245, but instead of this structure, a structure may be adopted in which the cleaning port 257 is not formed.
The structure disclosed in the third embodiment (including other embodiments of the third embodiment, and the same applies hereinafter) may be used in combination with the structure disclosed in the other embodiments as long as no conflict occurs. The third embodiment disclosed in the present specification is an example, and the present invention is not limited to this, and can be appropriately modified within a range not departing from the object of the present invention. The invention disclosed in the third embodiment can be applied to harvesters such as a general-purpose combine harvester and a semi-feeding combine harvester, agricultural working machines such as a tractor and a rice transplanter, and can be applied not only to agricultural working machines but also to working machines such as construction machines.
Description of the reference numerals
[ first embodiment ]
3: a harvesting unit (working device); 4: a threshing device (working device); 5: grain boxes (working devices); 6: a grain discharge device (working device); 8: an engine (drive source); 23: a first belt (belt); 23A: a threshing clutch (working clutch); 52: a clutch operation unit; 53: a throttle operator; 55: a rotation speed detection sensor; 57: a notification unit; r: engine speed (revolution); RL: a threshold value; rd: a first rate of change; ru: a second rate of change; tn: a notification timer (a set time set in advance from the transfer switching operation); tw 1: a first wait timer (first interval time); tw 2: a second wait timer (second interval time).
[ second embodiment ]
103: a cutting part; 104: raking the reel; 117: a reel frame; 118: a support bar (support member); 131: medial tines (tines); 131 a: a support portion; 131 b: a spring portion; 131 c: an action part; 132: a bolt; 132 a: a head of the bolt; 135: a cover member; 136: a fitting portion; 137: a first cover portion (cover portion); 137 a: an engaging portion (first engaging portion); 138: a second cover portion (a portion covering the head of the bolt); 139: a support bracket; 139 b: a pressing part; 139 c: an engaging portion (second engaging portion); x1: the axis of rotation.
[ third embodiment ]
216: an engine; 217: a heat sink; 218: a cooling fan; 219: a fan cowling; 219 a: an upper portion; 219 b: a lower portion; 219 c: a rear side portion (a heel side portion); 219 d: a front side portion (depth side portion); 219 e: a longitudinal wall portion; 219e 1: a left-side vertical wall portion (a front-side vertical wall portion); 219e 2: a right-side longitudinal wall portion (a depth-side longitudinal wall portion); 220: an engine room; 221: an engine cover; 222: a dust-proof shell; 226: a support frame; 243: a lower frame-shaped portion; 255: an opening (an opening through which the radiator can be taken out backward); 257: a cleaning port (an opening penetrating vertically); 258: a cover body; 260: an intake opening (opening); 261: a peripheral wall portion; 262: a boundary.
Claims (29)
1. A work vehicle is characterized by comprising:
a drive source capable of rotationally driving;
a working device driven by the drive source;
a transmission belt capable of transmitting power from the drive source to the working device;
a belt-tensioning type operation clutch that can be switched between a transmission state in which power is transmitted to the transmission belt and a non-transmission state in which power is not transmitted to the transmission belt;
a clutch operation unit capable of switching the working clutch between the transmission state and the non-transmission state based on a connection control signal and a disconnection control signal, the connection control signal being a control signal related to a connection operation of the working clutch, the disconnection control signal being the control signal related to a disconnection operation of the working clutch; and
a rotation speed detection sensor capable of detecting a rotation speed of the drive source,
when the rotation speed is equal to or less than a predetermined threshold value when the clutch operation means detects the communication control signal, the clutch operation means immediately performs a transmission switching operation for bringing the working clutch in the non-transmission state into the transmission state,
the clutch operation unit performs a first rotation control of reducing the rotation speed of the drive source so that the rotation speed becomes equal to or less than the threshold value in a case where the rotation speed is higher than the threshold value when the communication control signal is detected by the clutch operation unit, and performs the transmission switching operation in a state where the rotation speed has become equal to or less than the threshold value.
2. The work vehicle of claim 1,
when the first rotational speed control is performed and the transmission switching operation is completed in a state where the rotational speed has become the threshold value or less, the clutch operation means performs second rotational speed control that increases the rotational speed of the drive source so that the rotational speed is higher than the threshold value.
3. The work vehicle of claim 2,
the accelerator control device is provided with an accelerator operation member for setting the rotation speed,
the clutch operation unit performs the second rotational speed control so that the rotational speed reaches a set rotational speed of the accelerator operation member.
4. Working vehicle according to claim 2 or 3,
setting a first rate of change that is a rate of change per unit time of the rotation speed in the first rotation speed control and a second rate of change that is a rate of change per unit time of the rotation speed in the second rotation speed control,
the first rate of change is less than the second rate of change.
5. The work vehicle of claim 4,
the first rate of change is constant regardless of the rotation speed at the time when the clutch operation unit detects the communication control signal.
6. The work vehicle according to any one of claims 2 to 5,
setting a first interval time from completion of the first rotation speed control to start of the transmission switching operation and a second interval time from completion of the transmission switching operation to start of the second rotation speed control,
the second interval time is longer than the first interval time.
7. The work vehicle according to any one of claims 1 to 6,
a notification unit capable of notifying the delivery switching operation,
the notification unit continues to perform the notification regarding the transmission switching operation from a time when the clutch operation unit detects the communication control signal to a time when a preset set time has elapsed after the transmission switching operation is started.
8. The work vehicle of claim 7,
the set time is set to a time before the transfer switching operation is completed,
the notification unit stops the notification when the set time has elapsed.
9. A harvester is provided with a cutting part for harrowing and harvesting a planted crop at the same time, the cutting part is provided with a harrowing drum for harrowing and planting the planted crop, the harvester is characterized in that,
the raking reel is provided with: left and right reel frames which are rotationally driven around a rotational axis extending in the left-right direction of the machine body; a rod-shaped support member extending in the left-right direction of the machine body, the support member being provided in plurality so as to straddle the left and right reel frames; and a plurality of tines attached to the support member at intervals in the right-left direction of the machine body,
the fork tine is provided with: a support portion supported by the support member; a spring portion located below the support member; and an action part which is arranged in a state of hanging from the spring part and performs a raking action on the standing crop,
the harvester is provided with a cover member, and the cover member is provided with: a fitting portion fitted to an outer peripheral portion of the support member; and a cover portion extending downward through the rear of the spring portion and covering the spring portion from the rear.
10. A harvester according to claim 9,
the support portion is fixed to an outer peripheral portion of the support member by a bolt,
the cover member includes a portion that is provided so as to be continuous with the fitting portion and covers the head portion of the bolt.
11. A harvester according to claim 9 or 10,
the tines are formed in a shape that passes behind the support member to reach the spring portion,
the fitting portion is fitted to a front portion of an outer peripheral portion of the support member,
the cover extends downward in contact with the rear portions of the tines.
12. A harvester according to claim 11,
the cover portion extends downward to a height position below a lower end of the spring portion in a state of being in contact with a rear portion of the spring portion.
13. A harvester according to claim 11 or 12,
the cover part extends downwards to a height position lower than the lower end of the embedding part,
the harvester is provided with a support bracket which supports a lower part of the cover part which is positioned at a lower side than the lower end of the embedding part.
14. A harvester according to claim 13,
the support portion is fixed to an outer peripheral portion of the support member by a bolt,
the support bracket is fixed to the outer peripheral portion of the support member together with the support portion by the bolt.
15. A harvester according to claim 14,
the cover member includes a first engaging portion, and the support bracket includes a second engaging portion,
the support bracket is fixed to the outer peripheral portion of the support member by the bolt in a state where the first engagement portion and the second engagement portion are engaged with each other.
16. A harvester according to any one of claims 13 to 15,
the support bracket includes a pressing portion that presses the fitting portion from an opposite side of the support member when the support member is viewed in cross section.
17. A harvester according to any one of claims 13 to 16,
the cover member is an elongate member covering a plurality of the tines,
the lower portions of the cover member on the left and right sides are supported by the support brackets, respectively.
18. A harvester according to any one of claims 9 to 17,
the fork tine is provided with: one of the support portions; the left and right spring portions are disposed so as to be distributed left and right with respect to the one support portion; and left and right action parts corresponding to the left and right spring parts, respectively.
19. A harvester according to claim 18,
a support bracket that supports the cover portion is attached to the support member between the left and right spring portions.
20. A harvester according to any one of claims 9 to 19,
the spring portion is located forwardly and downwardly of the support member,
the cover portion is inclined forward and downward along a rear portion of the spring portion in side view.
21. A working machine is characterized by comprising:
an engine cover that covers the engine to form an engine room, supports the driver seat from below, and is open laterally outward;
a radiator for cooling an engine, provided in the engine room on a lateral outer side of the engine;
a dust-proof case provided on the lateral outer side of the heat sink and blocking the lateral outer side of the heat sink in a state of allowing air to pass therethrough and preventing dust from passing therethrough;
a cooling fan which is provided on the lateral inner side of the radiator and cools the radiator by taking in external air through the dust-proof case;
a fan cowling that is provided so as to straddle the cooling fan and the radiator while surrounding an outer periphery of an air intake space between the cooling fan and the radiator, and that guides outside air from the radiator to the cooling fan; and
a support frame that is provided so as to straddle the opening formed on the lateral inner side of the dust-proof case and the heat sink and supports the heat sink,
the radiator is supported by the support frame so as to be capable of sliding rearward along the cooling surface,
an opening through which the radiator can be taken out rearward is formed in a rear portion of the engine room.
22. The work machine of claim 21,
the fan cowling is configured to be capable of being divided into a plurality of divided bodies in the circumferential direction.
23. The work machine of claim 22,
some of the plurality of segments of the fan cowl are supported by the heat sink, and the other of the plurality of segments is separated from the heat sink.
24. The work machine of claim 23,
the partial segment is detachably supported by the radiator and is capable of being taken out backward along a direction in which the radiator is taken out.
25. The work machine of claim 24,
the fan cowling is configured such that an upper portion covering an upper side of the air intake space, a lower portion covering a lower side of the air intake space, and a near side portion covering a near side in the direction of taking out the air intake space can be taken out.
26. The work machine of claim 25,
the upper portion, the lower portion, and the heel portion are integrally formed.
27. The work machine of claim 26,
a vertical wall portion of the fan cowling covering a side surface of the cooling fan side of the air intake space is divided into a near-side vertical wall portion located near the taking-out direction and a depth-side vertical wall portion located at a depth side of the taking-out direction,
the near-side vertical wall portion can be taken out rearward integrally with the upper portion, the lower portion, and the near-side portion,
the depth-side vertical wall portion is provided integrally with a depth-side portion that covers a depth side of the intake space in the extraction direction.
28. The work machine of claim 27,
an air intake opening through which the cooling fan sucks air is formed in the vertical wall portion,
a peripheral wall portion protruding toward the cooling fan is formed on an outer peripheral portion of the air intake opening,
the cooling fan is provided in a state of entering the peripheral wall portion,
the boundary between the near-side longitudinal wall portion and the deep-side longitudinal wall portion in the peripheral wall portion is detachably connected,
the upper portion, the lower portion, and the near side portion are supported by the heat sink.
29. The work machine of any one of claims 21 to 28,
the support frame is formed in a rectangular frame shape along the outer periphery of the radiator, and an opening penetrating vertically is formed in a lower frame-shaped portion,
the cover body is capable of opening and closing the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410010620.7A CN117751757A (en) | 2019-04-24 | 2020-04-15 | Harvester and working machine |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-083085 | 2019-04-24 | ||
| JP2019083085A JP7169934B2 (en) | 2019-04-24 | 2019-04-24 | harvester |
| JP2019-102492 | 2019-05-31 | ||
| JP2019102492A JP7183114B2 (en) | 2019-05-31 | 2019-05-31 | work machine |
| JP2019102495A JP7183115B2 (en) | 2019-05-31 | 2019-05-31 | work vehicle |
| JP2019-102495 | 2019-05-31 | ||
| PCT/JP2020/016610 WO2020218123A1 (en) | 2019-04-24 | 2020-04-15 | Work vehicle, harvesting machine, and work machine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410010620.7A Division CN117751757A (en) | 2019-04-24 | 2020-04-15 | Harvester and working machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113677193A true CN113677193A (en) | 2021-11-19 |
| CN113677193B CN113677193B (en) | 2024-01-19 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410010620.7A Pending CN117751757A (en) | 2019-04-24 | 2020-04-15 | Harvester and working machine |
| CN202080026219.2A Active CN113677193B (en) | 2019-04-24 | 2020-04-15 | Work vehicle, harvester and work machine |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410010620.7A Pending CN117751757A (en) | 2019-04-24 | 2020-04-15 | Harvester and working machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN117751757A (en) |
| WO (1) | WO2020218123A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT169958B (en) * | 1948-10-01 | 1951-12-27 | Eugen Bautz | Drum hay machine with tractor drive |
| JP2005255042A (en) * | 2004-03-12 | 2005-09-22 | Yanmar Co Ltd | Working vehicle |
| JP2013063034A (en) * | 2011-09-16 | 2013-04-11 | Yanmar Co Ltd | Combine harvester |
| CN104420968A (en) * | 2013-08-26 | 2015-03-18 | 井关农机株式会社 | Prime mover structure of working vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000116226A (en) * | 1998-10-14 | 2000-04-25 | Iseki & Co Ltd | Combine harvester |
| JP2005178631A (en) * | 2003-12-19 | 2005-07-07 | Yanmar Co Ltd | Working vehicle |
| JP2010187572A (en) * | 2009-02-17 | 2010-09-02 | Yanmar Co Ltd | Working vehicle |
| DE102009028175A1 (en) * | 2009-02-27 | 2010-09-02 | Deere & Company, Moline | Self-propelled harvester |
| JP5697946B2 (en) * | 2010-04-26 | 2015-04-08 | 株式会社クボタ | Work vehicle |
-
2020
- 2020-04-15 CN CN202410010620.7A patent/CN117751757A/en active Pending
- 2020-04-15 WO PCT/JP2020/016610 patent/WO2020218123A1/en active Application Filing
- 2020-04-15 CN CN202080026219.2A patent/CN113677193B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT169958B (en) * | 1948-10-01 | 1951-12-27 | Eugen Bautz | Drum hay machine with tractor drive |
| JP2005255042A (en) * | 2004-03-12 | 2005-09-22 | Yanmar Co Ltd | Working vehicle |
| JP2013063034A (en) * | 2011-09-16 | 2013-04-11 | Yanmar Co Ltd | Combine harvester |
| CN104420968A (en) * | 2013-08-26 | 2015-03-18 | 井关农机株式会社 | Prime mover structure of working vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117751757A (en) | 2024-03-26 |
| WO2020218123A1 (en) | 2020-10-29 |
| CN113677193B (en) | 2024-01-19 |
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