JP2012096581A - Driving unit of working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving unit capable of easily cooling an engine (E) and easily removing dust adhering to a dustproof net (8a), and capable of preventing overheat of the engine (E) to increase work efficiency.SOLUTION: The driving unit includes: a radiator (7) disposed on an outside of an engine (E); a dustproof cover (8) having a dustproof net (8a) disposed on an outside of the radiator (7); a fan (9) disposed between the radiator (7) and the engine (E); and a hydrostatic continuously variable transmission (10) that drives the fan (9) in normal rotation and reverse rotation. Cooling air to cool the radiator (7) is sucked by normal rotation driving of the fan (9) by the hydrostatic continuously variable transmission (10), and dustproofing air to remove dust adhering to the dustproof net (8a) is blown by reverse rotation driving of the fan (9) by the hydrostatic continuously variable transmission (10). The hydrostatic continuously variable transmission (10) is disposed outside a rotation track of the fan (9).

Description

  The present invention relates to a driving part of a working vehicle such as a combine.

  Conventionally, a radiator cooling fan is driven by a hydraulic motor, and an electromagnetic valve that switches the supply direction of pressure oil is provided in the oil feed path from the hydraulic pump to the hydraulic motor. A technique is known in which regular cooling is performed and the fan is driven in reverse for a short time every set time to remove dust adhering to the core and air intake of the radiator from the inside to the outside (for example, Patent Document 1).

  In addition, a technique for driving such a fan forward and backward by a hydrostatic continuously variable transmission is also known (for example, Patent Document 2).

JP-A-8-144755 JP 2008-88823 A

  However, the above-described conventional technology has a drawback that the hydraulic motor or the hydrostatic continuously variable transmission itself becomes a resistance of cooling air by the fan, the cooling efficiency of the engine is lowered, and overheating is likely to occur.

  The object of the present invention is to improve the cooling efficiency by improving the intake of outside air by devising the installation position of the hydrostatic continuously variable transmission when driving the fan by the hydrostatic continuously variable transmission. With the goal.

In order to solve the above problems, the present invention has taken the following technical means.
That is, in the invention described in claim 1, the radiator (7) is arranged on the outer side of the engine (E), and the dust-proof cover body (8) having the dust-proof net (8a) is arranged on the outer side of the radiator (7). A fan (9) is disposed between the radiator (7) and the engine (E), and a hydrostatic continuously variable transmission (10) is provided for driving the fan (9) in the forward and reverse directions. Cooling air for cooling the radiator (7) is sucked by forward rotation of the fan (9) by the hydrostatic continuously variable transmission (10), and the fan (9) by the hydrostatic continuously variable transmission (10) is sucked. The dust-removing wind for removing the dust adhering to the dust-proof net (8a) is blown out by reverse rotation driving, and the hydrostatic continuously variable transmission (10) is arranged outside the rotation locus of the fan (9). The driving part of the working vehicle.

  As the fan (9) is driven forward by the hydrostatic continuously variable transmission (10), the cooling air drawn through the dust screen (8a) of the dust cover (8) passes through the radiator (7). After that, it blows through to the engine (E) side, and the engine (E) is cooled. On the other hand, by the reverse drive of the fan (9) by the hydrostatic continuously variable transmission (10), the dust removal wind blows out and the dust adhering to the dust net (8a) is blown off and removed.

  Since the hydrostatic continuously variable transmission (10) is disposed outside the rotation locus of the fan (9), the hydrostatic continuously variable transmission (10) is rotated forward of the fan (9). The passage of the cooling air sucked by the drive and the reverse rotation of the fan (9) do not hinder the intake of the inside air that becomes the dust removal wind, so that the cooling efficiency is properly maintained. In addition, a space for maintenance of the hydrostatic continuously variable transmission (10) can be secured, and the hydrostatic continuously variable transmission (10) can be easily attached and detached.

  According to the second aspect of the present invention, the input-side pulley (13) of the hydrostatic continuously variable transmission (10) to which the driving force of the engine (E) is input and the hydrostatic continuously variable transmission (10) of the hydrostatic continuously variable transmission (10). The output-side pulley (17) is disposed outside the engine (E), and the fan-side belt (22) interlocking with the fan (9) is connected from the output-side pulley (17) to the input-side pulley ( 13) is disposed in a portion outside the interlocking engine side belt (12).

Thereby, the belt transmission path between the engine (E), the hydrostatic continuously variable transmission (10), and the fan (9) can be simply configured.
According to a third aspect of the present invention, the input shaft (14) of the hydrostatic continuously variable transmission (10) protrudes outward from the hydrostatic continuously variable transmission (10). An output shaft (15) of the hydraulic continuously variable transmission (10) is projected inwardly from the hydrostatic continuously variable transmission (10) to output the hydrostatic continuously variable transmission (10). The gear transmission case (18) having a gear transmission mechanism for interlocking the shaft (15) and the second output shaft (16) provided with the output pulley (17) is provided. It is set as the drive part of the working vehicle of Claim 2.

  According to this configuration, the input side pulley (13) and the output side pulley (17) of the hydrostatic continuously variable transmission (10) can be arranged on the same side, and the belt transmission configuration to the fan (9) is simple. It will be something.

  According to a fourth aspect of the present invention, the hydrostatic continuously variable transmission (10) and the gear transmission case (18) are mounted on the engine (E) side. It is set as the drive part of the working vehicle of claim | item 3.

  By attaching the hydrostatic continuously variable transmission (10) for driving the fan (9) to the engine (E) side, belt transmission is stabilized, and troubles such as belt detachment due to deviation of the belt transmission line are eliminated.

  The invention according to claim 5 is characterized in that there is provided control means for repeatedly switching the hydrostatic continuously variable transmission (10) between a forward drive state and a reverse drive state every set time. A driving part of the working vehicle according to claim 1 or claim 2 or claim 3 or claim 4.

  The control of the hydrostatic continuously variable transmission (10) controls the cooling of the radiator (7) and the engine (E) performed by driving the fan (9) in the forward direction, and the dustproof network performed by driving the fan (9) in the reverse direction. The removal of the dust adhering to (8a) can be repeated every set time, and the cooling efficiency of the engine (E) can be properly maintained.

  According to the first aspect of the present invention, the engine (E) is cooled and the dust adhering to the dust net (8a) is removed by the forward and reverse rotation of the fan (9) by the hydrostatic continuously variable transmission (10). Can be done easily. At this time, since the hydrostatic continuously variable transmission (10) is disposed outside the rotation locus of the fan (9), the cooling air drawn by the forward rotation of the fan (9) and the fan ( 9) Since the reverse rotation driving of 9) does not prevent the intake of the inside air as the dust removal wind, the cooling efficiency can be properly maintained, the engine (E) can be prevented from overheating, and the work efficiency can be increased.

  Further, since the hydrostatic continuously variable transmission (10) is arranged outside the rotation locus of the fan (9), maintenance such as attachment / detachment of the hydrostatic continuously variable transmission (10) can be easily performed. Can do.

  According to the second aspect of the present invention, the fan (9) is linked from the output pulley (17) of the hydrostatic continuously variable transmission (10) while achieving the effect of the first aspect of the invention. By disposing the fan side belt (22) to be disposed outside the engine side belt (12) interlocking with the input side pulley (13) from the engine (E), the engine (E) and the hydrostatic stepless The belt transmission path between the transmission (10) and the fan (9) can be simply configured, and maintenance is facilitated.

  According to the third aspect of the present invention, the input side pulley (13) and the output side of the hydrostatic continuously variable transmission (10) can achieve the effects of the first or second aspect of the invention. Since the pulley (17) can be disposed on the same side with respect to the engine (E), the belt transmission path to the fan (9) can be simply configured, and maintenance is facilitated.

  According to the invention described in claim 4, the hydrostatic continuously variable transmission (10) for driving the fan (9) is achieved while achieving the effects of the invention described in claim 1, claim 2, or claim 3. ) On the engine (E) side, belt transmission is stabilized, and troubles such as belt detachment due to belt line deviation can be reduced.

  According to the invention described in claim 5, in order to achieve the effect of the invention described in claim 1 or claim 2, or claim 3 or claim 4, the fan (9) is driven to rotate forward so that the radiator (7) and The engine (E) is cooled, and the fan (9) is driven reversely at every set time to remove dust adhering to the dust net (8a), thereby preventing the cooling efficiency of the engine (E) from being lowered. As a result, work efficiency can be improved.

Combine side view Side view of the main part Front view of the main part Side view of the main part Side view of radiator dustproof device Front view of windshield Side view of radiator oil cooler, etc. Same as above (when opened) Side view of main parts Top view of the main part Side view of the main part Top view of the main part Side view of some of the above Side view of the main part

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a combine. A threshing unit (threshing device) 3 is mounted on a rear portion of a traveling vehicle body 1 having a traveling crawler 2 at a lower portion, and a reaping portion 4 is installed at a front portion thereof. The side part of the unit 2 is provided with a driving operation unit composed of a driver's seat 5 and an operation box 6 and the like, and further equipped with a Glen tank G for temporarily storing the grain after threshing behind the driving operation unit. is doing.

  An engine E is mounted on the machine base below the driver's seat 5. A radiator 7 is arranged on the outer side of the engine E, and a dust-proof cover body 8 with a dust-proof net 8 a is arranged on the outer side of the radiator 7. A fan 9 is arranged between the radiator 7 and the engine E, and the fan 9 is driven to rotate by a driving force of the engine E via a hydrostatic continuously variable transmission (hydraulic continuously variable transmission) 10. is doing.

  The input pulley 13 of the hydrostatic continuously variable transmission 10 is driven to rotate from the driving pulley 11 of the engine E via the engine side belt 12, thereby the hydrostatic continuously variable transmission input shaft 14, the hydrostatic continuously variable transmission. The fan 9 is driven to rotate through the device output shaft 15, the gears G 1, G 2, G 3, the second output shaft 16, the hydrostatic continuously variable transmission output pulley 17, the fan pulley 21, and the fan belt 22. It is linked to the configuration. The fan side belt 22 is disposed outside the engine side belt 12. The gear transmission case 18 having a gear transmission mechanism such as the gears G1 to G3 and the second output shaft 16 and the hydrostatic continuously variable transmission 10 are attached to the main body side of the engine E via an attachment stay 19. It is said.

  Cooling air is sucked from the dustproof cover body 8 when the fan 9 is driven forward by the hydrostatic continuously variable transmission 10, and dust-removing wind is blown out when the fan 9 is driven reversely by the hydrostatic continuously variable transmission 10. It is configured to remove dust adhering to the dust net 8a of the dust cover body 8. The hydrostatic continuously variable transmission 10 is arranged outside the rotation locus of the fan 9 so as not to obstruct the suction path.

  The fan 9 is configured to be controllable by the hydrostatic continuously variable transmission 10 so that forward rotation and reverse rotation can be repeated at set times. The set time for forward drive (cooling) is long, and the set time for reverse drive (dust removal) is set short. The rotational speed control of the fan 9 can also be arbitrarily set by the hydrostatic continuously variable transmission 10.

  In the embodiment shown in FIG. 4, in the configuration in which the radiator cooling fan 9 in front of the engine E is driven by the hydrostatic continuously variable transmission 10, the cabin compressor 23 and the hydrostatic continuously variable transmission 10 are the same. The belt (engine side belt 12) is driven from the engine E (primary pulley 11). Space can be effectively used by arranging the compressor 23 and the hydrostatic continuously variable transmission 10 on the left and right sides of the fan 9. Since the compressor 23 and the hydrostatic continuously variable transmission 10 are driven by the same belt, the transmission configuration is simplified.

  The embodiment shown in FIGS. 5 and 6 relates to the structure for supporting the wind shield 24 provided on the dust screen 8 a in the dust cover 8 of the radiator 7. The lower portion of the wind shield 24 extends along the guide rail 25. The roller 26 is supported by a roller 26 so as to be slidable. The roller 26 is pressed and held on the guide rail 25 side by a pressing spring 27. Since the wind shield plate 24 is always supported on the guide rail, the slide can be performed smoothly, and the strength of the wind can be arbitrarily adjusted by sliding the wind shield plate 24.

  7 and 8, the radiator 7 is configured to swing and open integrally with a case 30 that houses an oil cooler 29 with a horizontal shaft 28 provided at a lower outer side as a fulcrum. At the time of maintenance, the radiator 30 and the case 30 of the oil cooler 20 can be opened from the housed state of FIG. 7 with the horizontal shaft 28 as a pivot as shown in FIG. According to the above configuration, since the rotation fulcrum is provided outside the radiator 7, the opening amount of the radiator 7 is increased, and maintenance of the fan 9 and the crankshaft output portion is facilitated. Further, at the time of assembling at the factory, the assembly is easily performed because it is placed on the rotation fulcrum portion from above and is rotated about the fulcrum toward the engine E side.

  As shown in FIGS. 9 and 10, in the configuration in which the intercooler 31 and the oil cooler 29 are arranged on the front surface of the radiator 7, the case 30 containing the intercooler 31 and the oil cooler 29 and the oil cooler 29 are integrally opened. It is configured. Between the case 30 for storing the oil cooler 29 and the shroud S provided on the opposite side of the radiator 7, a vertical axis 32 serving as a pivoting fulcrum for opening is provided. A radiator mounting member 33 that supports the upper surface of the radiator 7 and fixes the driver's seat and the radiator supports the upper inner surface of the case 30 for housing the oil cooler 29 (see FIG. 10).

  By providing an opening rotation fulcrum of the case 30 for storing the oil cooler 29 with the shroud S sandwiching the radiator 7, the periphery of the radiator 7 can be made ASSY, and assembly becomes easy. By supporting the case 30 with the radiator mounting member 33, the radiator 7 main body is not weighted, and the durability of the radiator 7 is improved.

  In the embodiment shown in FIG. 11, an intercooler 31 and an oil cooler 29 are arranged on the front surface of the radiator 7, and a dust suction port 34 for sucking dust on the front surface of the dustproof cover 8 into the engine room is provided on the side surface of the radiator. Thus, the oil cooler storage case 30 is side-opened with the side opposite to the dust suction port 34 as a fulcrum (vertical axis 32). According to this configuration, cleaning of the core surface of the radiator 7 is facilitated, and the dust suction port portion is also opened, so that the dust suction port 34 can be easily cleaned. In FIG. 11, the dustproof cover 8 is configured to be able to swing open and close around the fulcrum Q.

  In addition, the intercooler 31 is configured to open and open (see FIG. 12) forward at the upper fulcrum (intercooler hose 35 portion) after the oil cooler 29 is opened. In this case, it is desirable that the open amount of the oil cooler 29 be larger than the open amount of the intercooler 31. Although the hose of the intercooler 31 is difficult to deform, if the oil cooler 29 is in an open state, the fins of the radiator 7 can be cleaned with a small opening amount.

  In addition, as shown in FIG. 13, when it is difficult to open the intercooler, the radiator 7 itself can be configured to be inclined toward the engine with the fulcrum P as the center. By tilting the radiator 7 in this manner, the fins on the front surface of the radiator 7 can be seen, and cleaning with air or the like is possible.

7 Radiator 8 Dustproof cover body 8a Dustproof net 9 Fan 10 Hydrostatic continuously variable transmission 12 Engine side belt 13 Input side pulley 14 Input shaft 15 Output shaft 16 Second output shaft 17 Output side pulley 18 Gear transmission case 22 Fan side belt E engine

Claims (5)

  A radiator (7) is arranged on the outer side of the engine (E), a dust-proof cover body (8) having a dust-proof net (8a) is arranged on the outer side of the radiator (7), and the radiator (7) and the engine ( E) is provided with a fan (9), and a hydrostatic continuously variable transmission (10) is provided to drive the fan (9) in forward rotation and reverse rotation. Cooling air for cooling the radiator (7) is sucked by forward rotation of the fan (9) by 10), and the dust net (8a) is driven by reverse rotation of the fan (9) by the hydrostatic continuously variable transmission (10). A prime mover for a working vehicle, characterized in that dust removing air is blown out to remove adhering dust, and the hydrostatic continuously variable transmission (10) is disposed outside a rotation locus of a fan (9).   The input pulley (13) of the hydrostatic continuously variable transmission (10) to which the driving force of the engine (E) is input and the output pulley (17) of the hydrostatic continuously variable transmission (10) are connected to the engine. (E) The fan side belt (22) which is arranged on the outer part and interlocks the fan (9) from the output side pulley (17), and the engine side belt which interlocks the input side pulley (13) from the engine (E). The driving part of the working vehicle according to claim 1, wherein the driving part is disposed at a portion outside the (12).   An input shaft (14) of the hydrostatic continuously variable transmission (10) protrudes outward from the hydrostatic continuously variable transmission (10), while the hydrostatic continuously variable transmission (10 ) Projecting inwardly from the hydrostatic continuously variable transmission (10), the output shaft (15) of the hydrostatic continuously variable transmission (10) and the output side The working vehicle according to claim 1 or 2, further comprising a gear transmission case (18) including a gear transmission mechanism that interlocks with a second output shaft (16) including a pulley (17). Prime mover.   4. The driving force of a working vehicle according to claim 1, wherein the hydrostatic continuously variable transmission (10) and the gear transmission case (18) are mounted on the engine (E) side. Department.   The control means for repeatedly switching the hydrostatic continuously variable transmission (10) between a forward drive state and a reverse drive state every set time is provided. The driving | running | working part of the working vehicle of Claim 3 or Claim 4.

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