JP4480531B2 - Combine cooling structure - Google Patents

Description

The present invention relates to a cooling structure for use in combine.

Recently, in the combine, HST utilizing lubricating oil stored in the transmission case to the hydraulic oil (HST) has been widely used as a transmission for traveling, an oil cooler for cooling hydraulic oil The structure provided in the air passage for engine cooling is adopted. The engine cooling structure of the combine employs a structure in which a box-type dust-proof duct is installed outside the horizontally-mounted water-cooled engine, and the purified air is sucked into the radiator through this dust-proof duct. Means for performing engine cooling and hydraulic oil cooling by disposing an oil cooler in the outside air introduction flow path for use (see, for example, Patent Document 1).
JP 2003-104070 A

  According to the above cooling structure, there is an advantage that the engine cooling and the hydraulic oil cooling can be rationally performed, but in order to incorporate the oil cooler into the dustproof duct, the size of the dustproof duct is increased, or the engine cooling capacity is somewhat reduced. Such a problem occurs. In addition, an oil cooler and a long pipe for the oil cooler are required, which is a cause of cost increase.

  The present invention has been made paying attention to such points, and an object thereof is to provide a cooling structure capable of efficiently cooling the transmission case and the hydraulic oil with a simple structure and an inexpensive structure. .

According to a first aspect of the present invention , a hydraulic continuously variable transmission is provided on the lateral side portion of the transmission case on the driving unit side, and the input case projects from the hydraulic continuously variable transmission toward the lateral outer side on the driving unit side . or is attached to the cooling fan transmission shaft for output, on the front side of the transmission case cooling, the shroud cooling air guide along the front outer surface of the transmission case from the cooling fan is provided, guided by the shroud during wind air passage, characterized in that the lubricating oil derived from the transmission case is arranged a pipe for circulating the front side of the transmission case.

According to the above configuration, the cooling air from the cooling fan is guided by the shroud and flows along the front outer surface of the transmission case to promote heat dissipation from the transmission case. Further, heat radiation from the pipe disposed in the cooling air passage is promoted, and the lubricating oil flowing through the pipe is also cooled.
In addition, the shroud functions as a mud-proof cover that covers the front side of the transmission case, and mud adheres to the outer surface of the case that comes into contact with the cooling air, thereby reducing heat dissipation efficiency.

  Therefore, according to the first invention, the air cooling structure for cooling the transmission case from the outside is utilized to cool the lubricating oil stored in the transmission case without the need for a dedicated oil cooler or a long pipe to it. This makes it possible to efficiently cool the transmission case and hydraulic oil with a simple and inexpensive structure.

According to a second invention, in the first invention,
The cooling fan is connected to a transmission pulley attached to the transmission shaft.

  According to the said structure, while being able to comprise a cooling wind generation | occurrence | production part cheaply, it will cool the transmission belt wound around the pulley, and it will contribute also to the improvement of durability of a transmission belt.

According to a third invention, in the first or second invention,
The shroud is supported so as to be displaceable, and the shroud is linked to a travel speed change lever provided on the operation panel of the operation unit via a main speed change operation mechanism for travel , and is linked to a main speed change operation by the travel speed change lever. and wherein the shroud is one that are configured to displace.

  According to the above configuration, since the main speed change operation mechanism is operated frequently, the shroud is moved each time a travel speed change is performed, mud and dust adhering to the shroud are shaken off, and the cooling air passage is narrowed by foreign matter. Thus, it is avoided that the cooling efficiency is lowered.

  FIG. 1 and FIG. 2 show a self-removing combine that is an example of a work machine. This combine is connected to a front part of a traveling machine body 2 provided with a pair of left and right crawler type traveling devices 1, and a cutting unit 3 having a double-cutting specification is connected to the traveling machine body 2, a driving unit 4, a threshing device 5 The grain collection tank 6 and the like are mounted.

The mowing part 3 is supported so that it can swing up and down at a fulcrum P at the upper rear part, and the whole mowing part can be moved laterally within a predetermined range via a slide part provided at the fulcrum P. When not working, the mowing unit 3 is slid to the right to be positioned within the lateral width of the traveling machine body 2, and during normal rotating mowing work, the mowing part 3 is slid to the left side so that the mowing part 3 is located on the left side of the traveling machine body 2 (the uncut side). ), The left traveling device 1 can pass through a position away from the uncut grain culm.

  The mowing unit 3 includes a pair of left and right elevating devices 7 that cause the planted cereals to a predetermined mowing posture, a clipper-type mowing device 8 that acts on the roots of the erected cereals, and erecting cereals. A pair of left and right front conveying devices 9 composed of belts with protrusions that are pulled backward, a pair of left and right rotating packers 10 that rakes and joins a plurality of reaped cereal grains, and conveys the merged reaped cereal grains to the feed chain 11 of the threshing device 5. A feeding and conveying device 12 and the like are provided, and a weed ridge 13 extending from the left end (uncutting side) of the cutting unit 3 to the lateral outside of the threshing device 5 is provided.

  As shown in FIG. 3, the weed ridge 13 is provided so as to be swingable around a fulcrum x in the front-rear direction, and the weed fold 13 is placed on the non-cutting side (the left side of the machine body) in normal turning operation. By swinging to the protruding weeding posture, it is possible to prevent the uncut corn straw from being pushed by the weed shear 13 and falling down to the front of the traveling device 1. In the case of traveling outside the field or in the case of pillow threshing work for manually feeding the chopped cereals to the threshing device 5, the weed slag 13 is erected upright to the retracted position close to the body side. To do. In this pillow threshing operation, the weed fold 13 in the retracted position can be used as a cradle for the manual cereal mash.

That is, as shown in FIG. 4, the cereal cradle base 15 is located on the upper part of the vertical transmission case 14 erected on the back of the left pull-up device 7 so as to be located outside the supply transport device 12. A guide rail 16 is mounted around the fulcrum y so as to be able to swing up and down, and a guide rail 16 provided at the rear portion of the grain cradle pedestal 15 is placed and engaged with the front portion of the feed chain 11 by its own weight. The stock holder of the cereal rice cake clamped and conveyed by the supply conveyance device 12 is pressed and guided by the guide rail 16 and guided to the front portion of the feed chain 11. Then, the weed ridges 13 that swing upright in the retracted position are arranged further outside the cereal cradle 15 so that the hand-cut cereals in the lying down position are spread over the cereal cradle cradle 15 and the weed culm 13. Temporary placement is performed, and an appropriate amount is manually fed into the feed chain 11. In this case, the stowage ridge 13 in the retracted position has a mountain-shaped bent portion 13a near the start position for starting the grain crunch between the feed chain 11 and the holding rail 17 disposed opposite to the feed chain 11, and The bending angle of the weed ridge 13 is set so that the weed fold 13 is lower than the grain cradle cradle 15 in front of the bent portion 13a and the weed fold 13 is lower than the feed chain 11 behind the bent portion 13a. ing. As a result, the cereal buds having a bulky side on the front side from the bent part 13a are stably placed and supported by the cereal cradle cradle 15 and the weed stalk 13 in a sideways posture, and the cereal buds behind the bent part 13a. 13 does not become a resistance to the stock movement of the cereal rice cake which has begun to be nipped and conveyed by the feed chain 11.

  6 to 8 show the structure of the operating unit 4 and the driving unit. A box-shaped bonnet 21 is provided at the right front portion of the traveling machine body 2, and a driver seat 22 is mounted on the bonnet 21. A water-cooled type hood 21 is enclosed in the engine room A surrounded by the bonnet 21. The engine 23 is vibration-proof mounted sideways, a cooling fan 24 and a radiator 25 are disposed on the laterally outer side of the engine 23, and an air cleaner 26 and a vertical muffler 27 are accommodated on the rear side of the engine room A. Has been deployed.

A wind duct 28 having a hollow vertical wall structure communicating with the front surface of the radiator 25 is provided on the lateral outer side (right side) of the bonnet 21, and a dust removing net is provided on the outer surface of the wind guide duct 28. An outside air intake port 29 is provided, and after the outside air taken into the air guide duct 28 by the suction action of the cooling fan 24 is supplied to the radiator 25, the engine room A flows toward the inside of the body. . In addition, a front duct 30 having a hollow vertical wall structure communicating with the front end of the air guide duct 28 is connected to the front side of the bonnet 21, and an outside air intake port in which a dust removal net is stretched on the front surface of the front duct 30. 31 is provided so that the outside air sucked from the outside air intake port 31 flows into the air guide duct 28 and is then supplied to the radiator 25 together with the outside air taken in from the outside air inlet port 29 of the air guide duct 28. It has become. In addition, an air guide plate 32 having a rearward refracting portion 32a at the end of the inside of the aircraft body is erected on the front side in the engine room A, and the front portion of the hood is heated by radiant heat from the engine 23. The cooling air that flows toward the inside of the body is guided to the rear of the body by the refracting portion 32a of the air guide plate 32, and the hot air in the engine room A flows to the feet of the driving unit 4 and the left side of the driving unit. Outflow from a lever hole or a gap of the deployed operation panel 33 is suppressed.

As shown in FIG. 9, a tang 35 that sucks outside air from the left and right suction ports 34 and supplies it as a sorter to the oscillating sorting section in the device is pivotally supported horizontally at the front of the threshing device 5. ing. The drive shaft of the red pepper 35 is an input shaft 36 of the threshing device 5, and an input pulley 37 provided on the input shaft 36 is provided with a vent hole 38 and a suction fan 39. The suction fan 39 sends outside air to the suction port 34 of the red pepper, and the suction fan 39 promotes the outflow of the cooling exhaust air from the engine room A.

  As shown in the transmission system diagram of FIG. 9, a mission case 40 that pivotally supports a drive sprocket 1 a of the traveling device 1 is provided at the front end portion of the traveling machine body 2, and a main transmission is disposed on the side of the transmission case 40. 41 is equipped. As the main transmission 41, a hydraulic continuously variable transmission (HST) having a variable displacement pump 41P and a constant displacement motor 41M and capable of continuously variable transmission in forward and reverse directions is used. 42 and the engine output shaft 23a are belt-linked via a tension type main clutch 43, and the engine output shaft 23a and the input shaft 36 of the threshing device 5 are belt-linked via a tension type threshing clutch 44. ing.

The forward and reverse shift outputs taken out from the transmission shaft 45 for output of the main transmission 41 are shifted in two stages via a gear-type sub-transmission mechanism 46, and then, for example, a side clutch (not shown) It is transmitted to the drive sprockets 1a of the left and right traveling devices 1 via the airframe steering transmission means.

The engine power input to the main transmission 41 is directly input to the transmission case 40 via the input transmission shaft 42, and is shifted to two stages via the gear-type cutting and shifting mechanism 47 for power extraction. Output from the transmission shaft (PTO shaft) 48. The transmission shaft 48 and the counter shaft 49 supported on the fulcrum P of the cutting unit 3 are belt-linked via a tension type cutting clutch 50. A ventilation hole 52 and a fan 53 are formed in the input pulley 51 provided in the counter shaft 49, and the fan 53 promotes the flow of cooling exhaust air in the engine room A toward the inside of the machine body. ing. Further, as shown in FIG. 12, the base end of the frame 3a in the cutting part 3 is swingable around the fulcrum P on the base 54 standing at the front part of the traveling machine body 2 and laterally along the fulcrum P. In addition to being slidably supported, the base 54 is formed with vent holes 55 penetrating left and right so that the hot air flowing toward the inside of the machine body by the fan 53 can flow without being blocked by the base 54. Yes.

  As shown in FIGS. 9 to 11, a cooling fan 58 is attached to the side surface of the input pulley 57 attached to the input transmission shaft 42 in the main transmission 41, and the cooling air generated by the cooling fan 58 is cooled. It is configured to spray the mission case 40 to promote heat dissipation from the mission case 40. A shroud 59 for guiding the cooling air from the cooling fan 58 along the front outer surface of the mission case 40 is provided at the front portion of the mission case 40, and the air passage for the cooling air guided by the shroud 59 is provided. Inside, the piping 60 led out from the mission case 40 is arranged, and while the lubricating oil stored in the mission case 40 flows through the piping 60, it is efficiently cooled by the cooling air guided by the shroud 59. Yes.

  Above the transmission case 40, the operation panel 33 provided on the left side of the driving unit 4 is located. From the operation panel 33, the swash plate angle of the variable displacement pump 41P in the main transmission 41 is determined. In addition, a traveling speed change lever 61 for switching the auxiliary transmission mechanism 46 between two steps of high and low is projected so as to be able to swing back and forth and laterally. The speed change operation arm 62 and the gear change sub-speed change operation arm 63 are linked to each other via a link mechanism 64 as a main speed change operation mechanism and a link mechanism 65 as a sub speed change operation mechanism, respectively.

  The shroud 59 is supported through a vertical swing link 66 so as to be movable up and down in parallel, and the vertical push / pull incorporated in a link mechanism 64 that interlocks and connects the travel speed change lever 61 and the main speed change operation arm 62. The rod 64a is interlocked with the shroud 59, and the shroud 59 is moved up and down each time the travel shift lever 61 is operated and the vertical push-pull rod 64a is displaced up and down, so that mud and dust adhering to the shroud 59 are removed. It has been shaken off.

Left side view of the entire combine Top view of the entire combine Combine front view Left side view of the cutting part Right side view of the front of the aircraft Right side view of the prime mover Cross section plan of the prime mover Longitudinal rear view of the prime mover Transmission system diagram Right side view of the speed change operation unit Front view of the shift operation unit Right side view of the base of the cutting part

4 driving parts
33 operation panel 40 mission case
41 hydraulic continuously variable transmission 42 transmission shaft 57 pulley 58 cooling fan 59 shroud 60 piping
61 Traveling speed change lever 64 Main speed change operation mechanism

Claims (3)

An input or output transmission shaft provided with a hydraulic continuously variable transmission on the lateral side of the transmission part of the transmission case and projecting from the hydraulic continuously variable transmission toward the lateral outer side of the operational part. in conjunction with mounting the cooling fan, the front side of the transmission case, a shroud for guiding cooling air from the cooling fan along the front outer surface of the transmission case is provided, in the air passage of the cooling air is guided by the shroud the cooling structure of the combine, characterized in that the lubricating oil derived from the transmission case is arranged a pipe for circulating the front side of the transmission case. The combine cooling structure according to claim 1, wherein the cooling fan is connected to a transmission pulley attached to the transmission shaft. The shroud is supported so as to be displaceable, and the shroud is linked to a travel speed change lever provided on the operation panel of the operation unit via a main speed change operation mechanism for travel , and is linked to a main speed change operation by the travel speed change lever. The combined cooling structure according to claim 1 or 2, wherein the shroud is displaced.

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