JP5578000B2 - Power train structure of work vehicle - Google Patents

Description

  The present invention relates to a driving part structure of a work vehicle.

  As disclosed in Patent Document 1, in a radiator cooling device for a work vehicle such as a combine, a radiator cooling fan is a belt transmission device that can be switched between a normal rotation state and a reverse rotation state. A technique is known in which a cooling fan is switched between a normal rotation state and a reverse rotation state by driving the cooling fan by either a pulley contacting an inner peripheral surface of a drive belt to be driven or a pulley contacting an outer peripheral surface. .

JP 2001-263063 A

  However, in the technique described in Patent Document 1, the switching mechanism between the forward rotation state and the reverse rotation state of the cooling fan for the radiator rotates the forward rotation pulley and the reverse rotation pulley integrally, and the inner peripheral surface of the belt This is a structure that is alternatively pressed against the outer peripheral surface. Therefore, since the forward rotation pulley and the reverse rotation pulley have to be moved greatly, operation failure often occurs.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an engine cooling device for a work vehicle that is less likely to malfunction because a cooling fan can be switched between forward and reverse rotation using a simple clutch that performs intermittent power. .

The problems of the present invention are solved by the following technical means.
According to the first aspect of the present invention, a radiator (14) is provided between the dust net (15) and the engine (16), and a cooling fan (7) is provided between the radiator (14) and the engine (16). The rotation of the engine output shaft (1) of the engine (16) is transmitted to the motor input / output shaft (4) of the electric motor (3) via the clutch (5), and the motor input / output shaft (4) The rotation is transmitted to the cooling fan (7), the clutch (5) is connected, and the cooling fan (7) is rotated forward by the driving force of the engine (16) to move from the outside to the inside of the dust net (15). A cooling state in which outside air is sucked, and a dust removing state in which the clutch (5) is disconnected and the cooling fan (7) is reversely rotated by the driving force of the electric motor (3) to blow air from the inside to the outside of the dust-proof net (15). It can be switched between and It was the prime mover unit structure of the work vehicle.

  The invention according to claim 2 is a tension type clutch that hangs a belt (D2) between the engine output shaft (1) and the motor input / output shaft (4), and tensions and relaxes the belt (D2). (5) It provided, It was set as the drive part structure of the working vehicle of Claim 1 characterized by the above-mentioned.

  According to a third aspect of the present invention, there is provided a gear (27) integral with the motor input / output shaft (4), and a case input shaft (1) provided between the engine output shaft (1) and the motor input / output shaft (4). A clutch gear (26) provided rotatably on 19) is engaged, and the clutch (5) is provided between the case input shaft (19) and the clutch gear (26). It was set as the drive part structure of the described working vehicle.

  The invention according to claim 4 is provided with a sensor (5a) for detecting the connected state and the disconnected state of the clutch (5), and when the sensor (5a) is switched from the cooled state to the dust-removed state, the sensor (5a) is provided with the clutch (5). The work vehicle according to claim 1, 2 or 3, wherein the reverse rotation of the cooling fan (7) is started by driving the electric motor (3) after detecting the power cut-off state. The prime mover structure was adopted.

  According to a fifth aspect of the present invention, the electric motor (3) is configured to be capable of forward rotation and reverse rotation, and the reverse rotation of the electric motor (3) is terminated when switching from the dust removal state to the cooling state. Then, the electric motor (3) is driven to rotate forward for a predetermined time, and the clutch (5) is connected during the forward rotation of the electric motor (3). It was set as the drive part structure of the working vehicle as described in any one of Claims 1-4.

  According to the first aspect of the invention, in the cooling state, the cooling fan (7) is driven to rotate forward by the driving force of the engine (16) to cool the radiator (14), and in the dust removal state, the electric motor (3). Since the cooling fan (7) is driven in reverse rotation by this, the switching between the cooling state and the dust removal state can be performed only by switching the clutch (5) and the driving state of the electric motor (3). It can be a structure. Further, if the electric motor (3) is a generator motor that generates a counter electromotive force by input to the output shaft, the motor input / output shaft (4) of the electric motor (3) is connected to the engine (16) in the cooled state. The electric motor (3) can also generate electric power by being rotationally driven by a driving force. The electric motor (3) used for driving the electric power required for the operation of the engine (16) and the cooling fan (7). ) Can be self-sufficient.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the switching mechanism formed between the engine (16) and the radiator (14) can be made compact, and the cooling fan ( The cooling efficiency of the radiator (14) according to 7) can be improved. Further, since the clutch (5) is a tension type clutch that tensions and relaxes the belt (D2), the impact when the clutch (5) is connected is reduced.

  According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, the transmission is effected by the meshing of the gear (27) and the clutch gear (26). It can be transmitted to the cooling fan (7), the fuel consumption of the engine (16) can be reduced, the driving rotational speed of the cooling fan (7) can be stabilized, and the cooling efficiency of the radiator (14) can be increased.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 1, 2 or 3, the driving force of the engine (7) to the motor input / output shaft (4) is ensured. Since the electric motor (3) can be driven in the disconnected state, wear and damage of the clutch (5) can be prevented and durability can be enhanced.

  According to the invention described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4, the motor output shaft (4) is driven in the forward rotation state by the electric motor (3). Since the clutch (5) is connected in the state where the motor is returned to the position, the wear and damage of the clutch (5) due to the connection of the clutch (5) with the motor output shaft (4) rotating in the reverse direction is prevented, and durability is maintained. Can increase the sex.

It is a power transmission diagram of the first embodiment of the present invention. It is a power transmission diagram of the second embodiment of the present invention. It is a power transmission diagram of the third embodiment of the present invention. It is a power transmission diagram of a cooling fan transmission mechanism. It is a power transmission diagram of a cooling fan transmission mechanism. It is a side view of a combine. It is a top view of a combine.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
Based on FIG.6 and FIG.7, the whole structure of the combine provided with this invention is demonstrated.
A pair of left and right crawler traveling devices 32 and 32 are disposed below the traveling vehicle body 31 of the combine 30, a control unit 33 is disposed on the right front side portion of the traveling vehicle body 31, and a Glen tank 35 is disposed on the rear side. A threshing section 34 is disposed in the section, and a slaughtering processing device 36 is disposed behind the threshing section 34. In front of the maneuvering unit 33 and the threshing unit 34, there is provided a cutting and conveying unit 37 that weeds and raises the planted cereal and lifts and conveys it toward the threshing unit 5 at the rear.

  The transmission diagram shown in FIG. 1 is a first embodiment of the present invention, in which a first output pulley 8 and a second output pulley 10 are integrally provided on the engine output shaft 1 of the engine 16, and the water pump in the engine 16 is provided. A water pump drive transmission system is constructed by winding a first belt D1 between a fan shaft pulley 9 and a first output pulley 8 which are integral with a water pump drive shaft 2 having a drive shaft protruding outside the engine 16. A motor drive transmission system is configured by winding a second belt (belt) D2 between a first motor pulley 11 integral with the motor input / output shaft 4 of the electric motor 3 and the second output pulley 10. The belt D2 is configured such that power transmission can be interrupted by a tension-type clutch 5 that switches between a power transmission state and a power cutoff state by tension and relaxation of the second belt D2. In this embodiment, the electric motor 3 is a generator motor that generates a counter electromotive force by forcibly rotating the motor input / output shaft 4 with an external force. Moreover, although the water pump drive shaft 2 is used as the fan support shaft 2, the fan support shaft 2 may be provided separately.

  The cooling fan 7 is driven by either the driving force of the engine 16 or the driving force of the electric motor 3, and the cooling fan 7 is driven to rotate in the forward direction by the engine driving force, and is sucked from the outside to the inside of the dust net 15. The cooling fan 7 is reversely rotated by the electric motor 3 and can be switched to a dust removing state in which the dust is blown from the inside to the outside of the dust screen 15.

In the following description, forward rotation refers to the rotational direction in which the cooling fan 7 is driven in a cooled state, and reverse rotation refers to the rotational direction in which the cooling fan 7 is driven in a dust-removed state.
The fan drive shaft 2 is supported by a cooling fan 7 at its shaft end, and the cooling fan 7 is driven to rotate forward through a radiator 14 and a dust net 15 disposed outside the cooling fan 7 to suck cooling air.

  Further, the motor input / output shaft 4 is integrally provided with a second motor pulley 12, and a third belt D3 is wound around the fan pulley 13 provided in the cooling fan 7 to constitute a fan drive system, which is cooled by reverse drive. The fan 7 is driven in reverse rotation to blow out blowing dust against the radiator 14 and the dust net 15 to remove the attached dust.

  In this configuration, when switching from the cooled state to the dust-removed state, the sensor 5a detects that the clutch 5 has been disengaged, and confirms that the rotation of the cooling fan 7 has become extremely low speed or stopped before the electric motor. 3 is driven in reverse rotation, and the cooling fan 7 is switched from the dust removal state to the cooling state, the reverse rotation drive of the electric motor 3 is stopped, the forward rotation drive is performed, and then the clutch 5 is connected to drive the engine 16. The cooling fan 7 is driven in the forward rotation by the force, and the electric motor 3 generates a current by the driving force and stores the electric power in a power storage device (not shown).

  The transmission diagram shown in FIG. 2 is a second embodiment of the present invention. The difference from the first embodiment is that a second fan shaft pulley 17 is provided integrally with the water pump drive shaft 2, and this second fan shaft pulley. 17 and the first motor pulley 11 are wound around a belt D2 to constitute a motor drive transmission system.

A third embodiment of the present invention will be described based on the transmission diagram shown in FIG.
A gear case 18 containing a clutch 5 such as a claw clutch or a friction clutch is interposed in a transmission path between the engine output shaft 1 and the motor input / output shaft 4, and a case input pulley 20 provided on a case input shaft 19 of the gear case 18 A belt 21 is wound around the first output pulley 8, a second motor pulley 12 is integrally provided on the motor input / output shaft 4, and a motor output shaft 4 a at the end of the shaft that protrudes on the opposite side of the second motor pulley 12 is connected to the joint. 23. The rotation of the case input shaft 19 is transmitted from the clutch gear 26 to the gear 27 of the case output shaft 22 to drive the case output shaft 22.

  When the movement of the shift arm 24 that slides the clutch 5 is detected by the sensor 5a and the cooling fan 7 is reversely rotated by the electric motor 3, the power cutoff state of the clutch 5 is detected by the sensor 5a and the engine output shaft is detected. The electric motor 3 is driven after confirming that the rotation of the cooling fan 7 becomes extremely low a few seconds after the driving force from 1 is cut off. When the clutch is engaged, the electric motor 3 is rotated forward so that the case input shaft 19 and the clutch gear 26 rotate at the same speed, and the electric motor 3 is turned off to generate power as a generator. .

  4 and 5 show an example in which the electric motor 3 is divided into a generator 3a and a motor 3b. The electric power generated by the generator 3a is stored in the battery 29 to drive the motor 3b. In the embodiment of FIG. 4, the motor 3 b is connected to the motor input shaft 28, but in the embodiment of FIG. 5, the motor 3 b is connected to the case output shaft 22. In both embodiments, the generator 3a and the motor 3b are compactly arranged on the opposite side of the case input pulley 20 with respect to the gear case 18 to improve cooling air flow.

  In the above embodiment, the timing for reversely rotating the cooling fan 7 is set to the automatic mode automatically performed at appropriate intervals and the manual mode performed by the operator operating the switch. In manual mode, the water temperature of the radiator is 90 ° C or less, and when the combiner is not driving the threshing device, when the cereals are not detected in the cereal conveyance path of the reaping device, when traveling is stopped, or when the engine 16 rotates When the dust removal switch is pressed at a low speed, the cooling fan 7 is reversely rotated for a certain time to automatically return to the normal rotation.

DESCRIPTION OF SYMBOLS 1 Engine output shaft 3 Electric motor 4 Motor input / output shaft 5 Clutch 5a Sensor 7 Cooling fan 15 Dustproof net 16 Engine 19 Case input shaft 26 Clutch gear 27 Gear D2 Belt

Claims (5)

  A radiator (14) is provided between the dust screen (15) and the engine (16), a cooling fan (7) is provided between the radiator (14) and the engine (16), and an engine output shaft of the engine (16) is provided. The rotation of (1) is transmitted to the motor input / output shaft (4) of the electric motor (3) via the clutch (5), and the rotation of the motor input / output shaft (4) is transmitted to the cooling fan (7). A cooling state in which the clutch (5) is connected and the cooling fan (7) is rotated forward by the driving force of the engine (16) to suck outside air from the outside of the dust net (15) to the inside; The clutch (5) is disengaged and the cooling fan (7) is reversely rotated by the driving force of the electric motor (3) so that it can be switched to a dust removal state in which air is blown from the inside to the outside of the dust screen (15). A prime mover structure for a working vehicle.   A tension-type clutch (5) is provided that hangs a belt (D2) between the engine output shaft (1) and the motor input / output shaft (4), and tensions and relaxes the belt (D2). The driving part structure of the work vehicle according to claim 1.   A gear (27) integral with the motor input / output shaft (4), and a clutch rotatably provided on a case input shaft (19) provided between the engine output shaft (1) and the motor input / output shaft (4) The work part drive structure according to claim 1, wherein the gear (26) is meshed, and the clutch (5) is provided between the case input shaft (19) and the clutch gear (26).   A sensor (5a) for detecting the connected state and the disconnected state of the clutch (5) is provided. When switching from the cooling state to the dust removal state, the sensor (5a) is electrically operated after detecting the power disconnected state of the clutch (5). The structure of the driving part of the work vehicle according to claim 1, 2 or 3, wherein the reverse rotation of the cooling fan (7) is started by driving the motor (3).   The electric motor (3) is configured to be capable of forward rotation and reverse rotation, and when switching from the dust removal state to the cooling state, the electric motor (3) is terminated after the reverse rotation drive of the electric motor (3) is finished. 5 is configured to be driven to rotate forward for a predetermined time and to connect the clutch (5) during the forward rotation of the electric motor (3). The drive part structure of the work vehicle as described in the item.

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