KR100963485B1 - Apparatus for cooling engine and rice-transplanter with the same - Google Patents

Abstract

The present invention relates to an engine cooling apparatus and a rice transplanter including the same, capable of increasing the output of the engine, improving the consumption efficiency of fuel, and the like.

Here, the engine cooling apparatus according to the present invention includes a cooling fan installed on one side of the engine, a fan case for receiving the cooling fan, and a top cover over which the cleaner room for receiving the air cleaner is formed. The fan case and the top cover are connected to each other so that the fan room and the cleaner room in which the cooling fans are accommodated are connected to each other, and the top cover has a structure in which outside air sucked into the fan room by the cooling fan is discharged to both sides through the cleaner room. It is composed.

Cooling, bonnet, engine, oil cooler, rice transplanter, top cover, fan

Description

Apparatus for cooling engine and rice-transplanter with the same}

The present invention relates to an engine cooling apparatus and a rice transplanter including the same, and more particularly, to an engine cooling apparatus and a rice transplanter including the same so as to improve an engine output, fuel consumption efficiency, and the like.

In general, work vehicles such as rice harvesters, tillers, combines, and tractors are equipped with air-cooled engines as prime movers that provide power for driving. The engine is prevented from overheating by an engine cooler which forcibly supplies outside air to the cylinder and cools the lubricant (ie, engine oil). The engine cooler includes an air cooling fan for cooling the engine. An oil cooler is included for cooling the lubricating oil.

The cooling fan sucks outside air to the engine side, and the sucked outside air is supplied to the engine along a wind path connecting the cooling fan to the intake port of the engine.

Here, the wind speed is configured to supply only a part of the air and exhaust the rest as it is, instead of supplying all of the outside air to the engine. The reason for supplying the outside air in this way is to prevent the temperature of the outside air in the wind from rising by the heat of the engine. According to this structure, it is possible to always supply cold air to the carburetor. It is possible to increase the output of the fuel cell and to improve the fuel consumption efficiency.

On the other hand, the outside air is discharged from the wind forward, after which the final discharge through the exhaust port in the front of the bonnet (bonnet).

The oil cooler cools the lubricating oil recovered from the engine, which is then resupplied to the engine to prevent wear and overheating of each friction portion, including the cylinder and piston of the engine.

Such an oil cooler is installed in front of the cooling fan so as to be cooled without having to separate a dedicated cooler. Specifically, the oil cooler is disposed so that its center portion is located on the same straight line as the axis center of the cooling fan.

The engine cooling apparatus configured as described above to cool the combustion heat, frictional heat, and the like of the engine can increase the discharge port area of the wind speed, thereby increasing the amount of discharge, thereby more effectively suppressing the increase in the temperature of the outside air in the wind speed. However, in the state that adhered to the method of discharging the outside air forward from the wind, there was a limit in securing the area necessary for the expansion of the discharge port.

In addition, since the outside air is discharged depending on one discharge port, there is a problem that it is difficult to flexibly cope with the drop in discharge efficiency when this discharge port is blocked by various obstacles.

In addition, even when driving or stopping, when the wind blows to the front of the vehicle and the outside air enters the exhaust port of the bonnet, there is a problem that the exhaust is delayed by this. Of course, this does not effectively prevent the temperature of the outside air in the wind rises.

On the other hand, the engine cooler described above has the advantage that the structure is simple because the oil cooler is cooled by using a cooling fan without a separate cooler, as described above, the <1> oil cooler is in front of the cooling fan Due to the fact that it is blocked, the amount of outside air intake is small, and because the outside air sucked by the cooling fan is used to cool the oil cooler, the heat of the oil cooler is mixed with the outside air to be sucked in, so that hot air is supplied to the engine. In addition, the engine cooling efficiency was poor, and in terms of engine operation, there was a problem in that the output and fuel consumption efficiency fell.

The present invention has been made in order to solve the problems as described, the object is to discharge a part of the outside air from both the left and right from the wind, the engine cooling that can effectively prevent the rise of the temperature of the outside air in the wind without significant structural changes An apparatus and a rice transplanter including the same are provided.

And by allowing the outside air discharged to the left and right to be finally discharged to the left and right of the bonnet, to provide a rice transplanter that can prevent the exhaust is not smooth due to the running or wind.

Another object of the present invention is to install an oil cooler in front of the cooling fan, the center of the cooling fan and the oil cooler is arranged so that the amount of outside air sucked is relatively high and the heat of the oil cooler is incorporated into the outside air It is an object of the present invention to provide an engine cooler capable of cooling the engine more effectively and a rice transplanter including the same.

Engine cooling apparatus according to the present invention for achieving the above object is a cooling fan installed on one side of the circumference of the engine; A fan case accommodating the cooling fan; A top cover overlaid to form a cleaner room for accommodating an air cleaner on an upper side of the engine, wherein the fan case and the top cover are connected to each other so that the fan room in which the cooling fan is accommodated and the cleaner room communicate with each other; The cover may be configured to have a structure in which outside air sucked into the fan room by the cooling fan is discharged to both sides through the cleaner room.

Wherein the cooling fan is disposed behind the engine and the top cover comprises a cleaner cover forming the cleaner room; A heat dissipation space may be formed in front of the cleaner room, and the heat dissipation cover may be configured to be connected to the cleaner cover to allow the heat dissipation space and the cleaner room to communicate with each other.

The top cover may further include a guide provided to guide the outside air flow between the left and right discharge ports to the left and right discharge ports. In addition, each discharge port may be formed to face downward.

The engine cooling apparatus according to the present invention may further include an oil cooler installed to face the cooling fan on the outside of the fan case.

Here, the oil cooler is eccentric so that the amount of outside air sucked by the cooling fan is increased in a range within which the cooling fan is cooled by the outside air sucked by the cooling fan than when the center thereof is positioned on the same straight line as the center of the cooling fan. More specifically, the cooling fan may be arranged so as to extend within and outside the range of influence of the suction force of the cooling fan.

The rice transplanter according to the present invention for achieving the above object is a vehicle including an engine covered with a bonnet, a wheel provided with power from the engine to the cloud movement and the engine cooling device to prevent the engine overheating; In a rice transplanter composed of a planting device installed on the rear of the vehicle and planted by the planting device, the engine cooling device comprises: a cooling fan installed at one circumference of the engine; A fan case accommodating the cooling fan; A top cover overlaid to form a cleaner room for accommodating an air cleaner on an upper side of the engine, wherein the fan case and the top cover are connected to each other so that the fan room in which the cooling fan is accommodated and the cleaner room communicate with each other; The cover may be configured to have a structure in which outside air sucked into the fan room by the cooling fan is discharged to both sides through the cleaner room.

Wherein the cooling fan is disposed behind the engine and the top cover comprises a cleaner cover forming the cleaner room; A heat dissipation space is formed in front of the cleaner room and includes a heat dissipation cover connected to the cleaner cover to allow the heat dissipation space to communicate with the cleaner room. The heat dissipation cover is provided with at least one discharge port on each side of the heat dissipation cover, and the bonnet Each of the exhaust ports may be provided so as to face the discharge ports on the left and right sides thereof.

In addition, such a rice transplanter may be configured to further include an exhaust duct connecting the exhaust port facing the discharge port.

Since the present invention is configured so that a part of the outside air supplied to the engine is discharged simultaneously to both sides, i.e., right and left, through the cleaner room, a large discharge effect can be seen with a simple structure. In addition, even if one of the left and right discharge ports is blocked, the outside air can be smoothly discharged by the other.

In addition, since the exhaust port which finally discharges the outside air discharged from the discharge port faces the discharge port on the left and right sides of the bonnet, the final discharge of the outside air is not affected by the wind even when driving or in any direction. can do.

In addition, since the oil cooler is disposed away from the axis and the center of the cooling fan, unlike the conventional one in which the oil cooler blocks the cooling fan in front of the cooling fan in front of the cooling fan, the suction amount of outside air is large, compared with the conventional one. Since the heat of the oil cooler mixed with the outside air is relatively small, the engine can be cooled more effectively.

Taken together, the present invention is an invention that can further increase the output of the engine, improve the consumption efficiency of the fuel, and the like.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of an engine cooling apparatus and a rice transplanter including the same according to the present invention will be described.

For reference, although the engine cooling apparatus according to the present invention can be applied to a cultivator, combine, tractor, etc., it will be described here with reference to the application to the rice transplanter.

1 and 2 are a perspective view and a side view of a rice transplanter to which an engine cooling apparatus according to a first embodiment of the present invention is applied, showing a passenger-type rice transplanter among rice transplanters. 3 is a perspective view which shows the chassis among the components of the rice transplanter shown in FIG. 1, FIG.

As shown in Fig. 1 to Fig. 3, the rice transplanter is a vehicle 10 that a worker rides and drives directly, a planting apparatus 60 installed at the rear of the vehicle 10, and a model to be supplied to the planting apparatus 60. That is, it is roughly divided into a spare mother shelf 70 used for storing the spare mother, among which the vehicle 10 may be divided into a chassis and a body again.

The chassis changes the frame 11 constituting the basic skeleton, the air-cooled engine 12 mounted on the front of the frame 11, and the rotational speed required for the power output from the engine 12, while changing the speed. A pair of front wheels (14f) which are rolled by receiving the driving power from the transmission via the transmission, front axle (13f) and rear axle (13r), which distributes the power to be used for driving and work. And rear wheel 14r.

Here, the engine 12 has an intake port (reference numeral 12-1 in FIG. 4) formed at an upper portion thereof, and an air cleaner (FIG. 4 in FIG. 4) filtering the air flowing into the intake port 12-1. Reference numeral 49 is connected. Transmission is a continuously variable transmission with hydrostatic transmission (HST). The front wheel 14f is steerable, while the rear wheel 14r is provided to have an impossible structure.

The body comprises a body cover 16 with a bonnet 15 which covers the engine 12 separately, which body cover 16 is installed on top of the frame 11 and covers almost the majority of the chassis when so installed. Has a form.

The vehicle 10 as described above further includes an accelerator pedal 17 used to operate a throttle lever so that the rotation speed and output of the engine 12 are adjusted, and the accelerator pedal 17 is operated. It includes a HST drive mechanism for transmitting the operating force of the accelerator pedal 17 to the swash plate of the HST to adjust the angle of the swash plate so that the operation of the HST is performed. The braking device for controlling the traveling speed according to the operation of the brake pedal 18 and the brake pedal 18, the steering wheel 19, and the direction of travel are changed in accordance with the operation of the steering wheel 19. A steering device that changes the axial direction of the two front wheels 14f as much as possible.

In addition, the outside includes various planting device operating levers used to operate the planting device 60, and a seat 20 which is a seat for the occupant to sit on. The accelerator pedal 17 and the HST drive mechanism , When the engine 12 including the state of driving by a braking device, a steering device, or the like is being driven, forcibly supplies the outside air to the engine 12 and cools the engine oil which is lubricating oil. It further comprises an engine cooler to prevent overheating.

Here, the planting device operating lever, the accelerator pedal 17, the brake pedal 18, the steering wheel 18, and the like, which are to be handled by the operator, may be operated by the operator in the seating position of the seat 20. 20) is placed around.

The steering system is a steering column 39 with a steering shaft which is connected to the steering wheel 19 with its upper end rotated, and a rack and pinion type mounted at the lower end of the steering shaft. A steering gear and a steering link respectively provided between the steering gear and the two front wheels 14f.

Here, the steering column 39 is arranged at a certain distance behind the engine 12 so that the steering wheel 19 is disposed directly in front of the seat 20. The steering gear and the steering link change the direction of movement of the steering shaft in the direction necessary for steering and transmit it to the two front wheels 14f.

4 is a cross-sectional view taken along the line A-A of FIG. 5 and 6 are a plan view and a perspective view of FIG. 4, and FIG. 7 is a front view as viewed in the direction B of FIG. 4, all of which show an engine cooling apparatus and related components.

As shown in FIGS. 4 to 7, the engine cooling apparatus includes a cooling fan assembly 40 that sucks outside air and supplies the engine 12 to the engine 12, and the engine oil that is heated by the engine 12. It consists of lubricating oil cooling means 50 which collect | recovers, cools, and supplies it to the engine 12 again.

The cooling fan assembly 40 includes a cooling fan 41, a fan case 42 and a top cover 45, of which the fan case 42 is a cooling fan 41 on the rear side of the circumference of the engine 12. ) Is installed in such a way as to cover the rear part of the engine 12 so that the fan room R1 is accommodated therein, and the top cover 45 is a cleaner room R2 in which the air cleaner 49 is accommodated above the engine 12. ) Is covered in the upper part of the engine 12 to form.

As described above, the cooling fan 41 is accommodated in the fan room R1, and the cooling fan 41 is disposed so that the front side thereof faces the rear side, and in this state, the belt or the chain-driven transmission is used. It is installed to rotate by receiving power from the output shaft of the engine 12. Of course, the cooling fan 41 sucks the outside air during rotation.

The fan case 42 and the top cover 45 are integrally formed. That is, the upper part of the fan case 42 and the rear part of the top cover 45 are connected to have an integrated structure, but may be configured to be coupled and separated depending on the embodiment conditions. The fan case 42 and the top cover 45 are configured to have a structure in which the fan room R1 and the cleaner room R2 communicate with each other spatially.

On the other hand, the fan case 42 of the fan case 42 and the top cover 45 is provided with the suction port 43 corresponding to this cooling fan 41 at the part facing the cooling fan 41. In addition, the suction port 43 is provided with a dustproof net 44 for preventing foreign matter from being introduced together with the outside air.

According to the cooling fan assembly 40 up to this point, the cooling fan 41 rotates when the engine 12 is driven to generate suction power, and thus, outside air flows into the fan room R1 through the suction port 43. After that, the introduced outside air is sequentially supplied to the engine 12 through the cleaner room R2 and the air cleaner 49.

In the operation of the cooling fan assembly 40 described above, only part of the outside air is supplied to the engine 12 and the remaining air is discharged as it is, so that the temperature of the outside air introduced into the cleaner room R2 may be suppressed. Thus, the top cover 45 has a plurality of discharge ports 46, the discharge port 46 is formed at least one side of the front side of the top cover 45, that is, at least one each. The top cover 45 also has a guide 47 for guiding the flow of outside air flowing into the cleaner room R2 toward the left and right discharge ports 46. The guide 47 has left and right discharge ports 46. The partitions erected between them are preferably provided to have a streamlined structure that can naturally change the flow of outside air.

In addition, the top cover 45 forms a heat dissipation space R3 directly in front of the cleaner cover 45A forming the above-mentioned cleaner room R2, and the cleaner room R2, and the heat dissipation space R3. And a heat dissipation cover 45B connected to the cleaner cover 45A so that the cleaner room R2 can be spatially communicated, the heat dissipation cover 45B is formed in a substantially rectangular structure, and the discharge hole 46 described above on the left and right sides thereof. Are each formed. The guide 47 described above is disposed in the heat dissipation space R3.

According to this structure, the outside air sucked by the cooling fan 41 is discharged after passing through the cleaner room R2, and the outside air discharged through the exhaust fan 15-1 is provided in the bonnet 15. The exhaust port 15-1 is disposed to face the discharge ports 46 on the left and right sides, respectively. At this time, an exhaust duct 48 is provided between the exhaust port 15-1 and the discharge port 46 facing the exhaust port 15-1 so that the two are connected to each other.

For reference, the cleaner cover 45A is connected to the fan case 42 so that the fan room R1 and the cleaner room R2 can communicate with each other. In addition, the exhaust port 15-1 may be provided with a net.

According to the discharge structure described, a part of the outside air introduced into the cleaner room R2 is quickly discharged from side to side through the discharge port 46. In addition, even if one of the left and right discharge ports 46 is blocked, the outside air continues to be discharged through the other.

In addition, the outside air discharged from the cleaner room R2 is finally discharged through the exhaust ports 15-1 on the left and right sides of the bonnet 15, and is quickly exhausted even when the vehicle is running. Of course, during the stop, even if the wind blows from any direction toward the vehicle 10 is exhausted. That is, unless the wind blows toward the left and right of the vehicle 10 at the same time, exhaust can be achieved at all times.

The lubricating oil cooling means 50 is an oil cooler 51 configured to cool the engine oil by heat exchange, and the engine 12 and the oil cooler so that the engine oil heated in the engine 12 flows into the oil cooler 51. An oil return line 52 connecting the 51 and an oil supply line 53 connecting the oil cooler 51 and the engine 12 to supply the engine oil cooled by the oil cooler 51 to the engine 12. It is composed of

According to this, the engine oil of the engine 12 is transferred to the oil cooler 51 along the oil return line 52, which is cooled in the oil cooler 51 and then the engine 12 along the oil supply line 53. Circulated in such a way that it is supplied again.

The oil cooler 51 is installed between the cooling fan 41 and the steering column 39 so as to be located outside the fan case 42. Preferably, the oil cooler 51 is firmly attached to the steering column 39 by mounting means such as the bracket 54. Is fitted.

According to this installation structure, the oil cooler 51 is located directly in front of the cooling fan 41, specifically, a constant distance D such that the center thereof is not positioned on the same straight line as the axis center of the cooling fan 41. ) Placed in an eccentric place.

As described above, the center of the oil cooler 51 is biased with respect to the axis center of the cooling fan 41 so that the axis of the cooling fan 41 and the center of the oil cooler 51 are inconsistent with each other. ) Is an arrangement for increasing the amount of outside air suctioned by the &lt; RTI ID = 0.0 &gt; 1) &lt; / RTI &gt;

If the size of the oil cooler 51 is smaller than that of the inlet 43, the oil cooler 51 is still in the inlet 43 even though the axis of the cooling fan 41 and the center of the oil cooler 51 are inconsistent. If there is no change in the area covering the suction port 27 located in the inner region of, the effect of increasing the outside air suction amount will not be seen. Accordingly, reference numeral D, that is, eccentricity, means a distance in which the amount of outside air sucked is increased than when the center of the oil cooler 51 is located on the same straight line as the axis center of the cooling fan 41. .

In addition, if the oil cooler 51 cannot be cooled by the sucked outside air, the cooling effect of the engine 12 is inevitably deteriorated. Therefore, the eccentric distance D is determined within the range in which the oil cooler 51 is cooled by the suctioned outside air.

FIG. 8 is a view showing related parts separately in FIG. 7 in order to explain an arrangement relationship between the cooling fan 41 and the oil cooler 51. In FIG. 8, parts filled with dots corresponding to the inner region of reference E are shown in FIG. Is the influence area E-1 which the suction force of the cooling fan 41 has, and the outer side is the non-effect area E-2 which is not.

As can be seen from FIG. 8, the oil cooler 51 in this embodiment is arranged to partially cool the air sucked in, that is, span the area of influence E-1 and the area of non-effect E-2. do.

The table below shows the results of tests conducted by the applicant to prove the effect of the engine cooling system on the arrangement of the oil cooler 51.

In the above table, <a> is the temperature of the engine oil when the oil cooler 51 is disposed in the non-affected zone E-2, and <b> is the center of the cooling fan 41 at the center of the oil cooler 51. The temperature of the engine oil when disposed so as to coincide with the center, and <C> is the engine oil when the center of the oil cooler 51 is inconsistent with the center of the axis of the cooling fan 41 so that the suction amount of outside air is increased as compared with <B>. Is the temperature. Of course, the inconsistency in this <da> means that the oil cooler 51 is made in the range to be cooled by the cooling fan 41.

Here, the set rpm (revolutions per minute) of the engine under test is 3850 wh 150 and the temperature of the engine oil is measured after 30 minutes of operation.

The planting device 60 is connected to the frame 11 of the vehicle 10 by a link mechanism 55 so as to be lifted and lowered by a hydraulic cylinder. On the other hand, a rotary type planting mechanism 62 having a plurality of rows of mother shelves 61, a planting claw 63, and a plurality of floats having a plurality of rows having a lower slope are included.

Here, the mother shelf 61 carries the hair to be planted on its respective inclined surface. The planting mechanism 62 is installed at the lower end side of the mother shelf 61. The planting rake 63 pulls down the seedlings along the inclined surface of the mother shelf 61 by appropriate amounts and planted them in the paddy field. The float evens out the rice fields to be planted by this planting mechanism 62 while keeping the planting depth constant.

As described above, the planting device 60 receives the working power from the transmission and operates at a speed synchronized with the traveling speed of the vehicle 10.

The spare mother shelf 70 has a structure of a cantilever in a pair of struts 71, a connecting bar 72 at which both ends are connected to an upper end of the strut 71, and a strut 71, respectively. It consists of a plurality of trays 73 mounted. At this time, the tray 73 is arranged in a stacked form at regular intervals up and down.

Such spare mother shelf 70 is provided with two. And each is installed so as to be located to the left and right of the bonnet (15).

Next, the configuration of the frame 11 and the vehicle body cover 16 will be described. The body cover 16 will be described first.

The vehicle body cover 16 is divided into one main cover 21 and two sub covers 22. And, among these, the sub cover 22 constitutes a front portion of the vehicle body cover 16, and covers portions corresponding to both sides of the bonnet 15 of the chassis, respectively.

On the other hand, both the main cover 21 and the sub-cover 22 is a step (step) that the operator boards the upper surface, the sub-step 23, which is the upper surface of the sub-cover 22 is the work of the engine room, It is used for the passage between the main step 24 and the bonnet 15, which are the upper surfaces of the main cover 21.

The main step 24 is located at the rear of the substep 23, the center step 25 which covers the center part of the chassis, and the rear step which is positioned at regular intervals behind the center step 25 to cover the rear part of the chassis. (26) and the connecting portion 27 which integrally connects the rear step 26 and the center step 25 with each other.

Here, the center step 25 and the rear step 26 are substantially horizontal, of which the rear step 26 is positioned so that its height is higher than the center step 25. The connection part 27 is comprised by the front side convex curved part 28 which connects the center part of the center step 25 and the back step 26, and the inclination part 29 located in both of this curved part 28, respectively.

The frame 11 includes a basic frame 30, a bar type step stay, and a seat frame, wherein the basic frame 30 is configured to have a long rectangular structure approximately back and forth when viewed from above.

The step stay serves to support the step. These step stays are divided into a main step stay and a sub step stay 31, among which the main step stay is further divided into a center step stay 32 and a rear step stay 33.

The two sub-step stays 31 are provided in one pair, and are respectively provided on the left and right sides of the base frame 30 so as to be positioned one pair under the two sub-steps 23.

The center step stay 32 is provided with two bars, and is provided on the left and right sides of the base frame 30 so as to be located one each on both sides of the bottom of the center step 25.

At least one rear step stay 33 is provided below the rear step 26 and is provided on the base frame 30 so as to be perpendicular to the longitudinal direction of the base frame 30.

For reference, a pair of struts 71, which is a component of the spare mother shelf 70, is firmly mounted to a set of sub-step stays 31 by fastening means.

The seat frame is disposed at the rear step 26 so as to be located behind the curved portion 28 constituting the connection portion 27, and the rear frame is disposed at the rear step stay so as to be positioned above the rear step 26. And a mounting frame stay 35 mounted to the base frame 30 so as to support the front portion of the mounting frame 34.

For reference, a fuel tank 56 is disposed below the mounting frame 34, and the seat 20 is mounted to rotate forward.

Next, the planting device operating lever will be described. The rice transplanter has a planting device elevating lever 36, a hydraulic sensitivity adjusting lever 37, and a hydraulic stop lever 38 as described below.

The planting device lifting lever 36 is used to control the operation of the hydraulic cylinder for elevating the planting device 60, wherein the hydraulic cylinder is used for the planting device 60 according to the operation of the planting device lifting lever 36. ) Can be raised or lowered or placed at any (raised / lowered) height.

The planting device lifting lever 36 is located on the right side of the steering wheel 19. And at least the bar is installed so as to enable the angular movement, for example, when pushed forward, the planting device (60) is raised and pulled to the rear and lowered, if placed in the intermediate position, such lifting operation can be stopped.

In the case of the planting device 60, the hydraulic sensitivity adjusting lever 37 is oscillated, such as inclining the float according to the hardness of the paddy field (whether it is soft or hard). Since a change occurs in the posture, the lifting control sensitivity (sensitivity or insensitivity) of the mother shelf 51 is automatically adjusted according to the degree of fluctuation of the float, which is used to adjust the sensitivity.

Such a hydraulic sensitivity control lever 37 is disposed in the rear step 26 so as to be close to the left side of the seat 20, preferably located on a imaginary extension line extending from the center portion of the seat 20 in the lateral direction. It is positioned forward with respect to this extension line. In this way, the operator can operate the hydraulic sensitivity adjusting lever 37 without the need to lean back and extend the arm in the sitting position on the seat 20.

For reference, whether or not to make the control sensitivity in this case sensitive or insensitive can be divided into one to six steps, for example, one of them can be selected by the hydraulic sensitivity control lever 37, The selection operation is configured to allow the angular movement of the hydraulic sensitivity control lever 37 back and forth and left and right to move forward and backward, and thus to move to the left and right to make a selection.

The hydraulic stop lever 38 may prevent the planting device 60 from elevating even when the planting device elevating lever 36 is operated. Thus, the hydraulic fluid for the hydraulic cylinder is fixed so that the planting device 60 is fixed. It is used to close the supply line or, on the contrary, to open the working fluid supply line so that it is released.

The hydraulic stop lever 38 is disposed at the rear step 26 so as to be located between the seat 20 and the hydraulic sensitivity adjusting lever 37, and is located in front of the hydraulic sensitivity adjusting lever 37. Even if located with the sensitivity adjusting lever 37, the position of the hydraulic sensitivity adjusting lever 37 is prevented from being confused with the hydraulic sensitivity adjusting lever 37.

For reference, the hydraulic stop lever 38 is installed to have a structure capable of angular movement in the front and rear direction, for example, it can be opened by pushing and closing the working fluid supply line when pushed. At this time, the closing operation of the hydraulic stop lever 38 is mainly used when moving, maintaining or storing.

In addition, the hydraulic stop lever 38 is directly connected to the hydraulic stop valve, and the hydraulic stop valve is directly connected to the accumulator. And the hydraulic stop valve is connected to the base of the hydraulic stop lever 38, the accumulator is connected to the bottom of the hydraulic stop valve.

On the other hand, the hydraulic sensitivity adjusting lever 37 and the hydraulic stop lever 38 are detachably mounted to the rear step stay 33 by detachable means including a bracket so that both of them are arranged as described above. At this time, the bracket used for mounting the hydraulic sensitivity control lever 37 may be configured to have a structure of a guide for guiding the angular movement to the front, rear, left and right of the hydraulic sensitivity control lever 37.

On the other hand, the hydraulic sensitivity adjusting lever 37 and the hydraulic stop lever 38 protrude from the rear step 26. The hydraulic stop lever 38 has a protruding length shorter than that of the hydraulic sensitivity adjusting lever 37. Is formed.

The shorter length of the hydraulic stop lever 38 in this way prevents the position of the hydraulic stop lever 38 and the hydraulic sensitivity adjustment lever 37 more completely, and in addition, the operator can operate the steering wheel 19 or the like To prevent interference. That is, the hydraulic stop lever 38 has a length without unnecessary cradle for the operator sitting on the seat 20 and acting.

FIG. 9 is a perspective view showing a part of an engine cooling apparatus according to a second embodiment of the present invention. Next, referring to FIG. 9, a second embodiment having a configuration similar to that of the engine cooling apparatus according to the first embodiment of the present invention will be described. Let's look at.

For reference, the second embodiment will be described based on different parts as compared with the first embodiment, and only the corresponding parts will be shown in the drawings.

As shown in FIG. 9, the engine cooling apparatus according to the second embodiment of the present invention has the same configuration as that of the discharge port 46-1 so that the other components are all the same as compared with the first embodiment. Only the points formed are different.

Here, at least part of the left and right sides of the heat dissipation cover 45B where the discharge holes 46-1 are formed is formed as an inclined surface such that the discharge holes 46-1 face downward.

On the other hand, in the case of this second embodiment, it may be configured without the exhaust duct 48 of the first embodiment.

The present invention has been described above, but the present invention is not limited to the embodiments disclosed in the specification and the accompanying drawings, and may be variously modified by those skilled in the art within the scope of the present invention.

For example, the above described the engine cooling apparatus according to the present invention is applied to a rice transplanter, but is not only applicable to this rice transplanter. That is, as described at the outset, it can be applied to a cultivator, combine, tractor, etc. Specifically, a cooling fan assembly and an oil cooler are applied to all types of work cars that cool the engine thereby. You can do it.

1 and 2 are a perspective view and a side view showing a rice transplanter to which the engine cooling apparatus according to the first embodiment of the present invention is applied.

3 is a perspective view illustrating a chassis of the rice transplanter shown in FIGS. 1 and 2.

4 is a cross-sectional view taken along the line A-A of FIG.

5 and 6 are plan and perspective views of FIG. 4.

FIG. 7 is a front view seen from the direction B of FIG. 4.

FIG. 8 is a front view illustrating an arrangement relationship between the cooling fan and the oil cooler illustrated in FIG. 7.

9 is a perspective view showing a part of an engine cooling apparatus according to a second embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

10 vehicle 12 engine

14f, 14r: Wheels (front wheel, rear wheel) 15: Bonnet

15-1: exhaust port 41: cooling fan

42: fan case 45: top cover

45A: Cleaner Cover 45B: Heat Dissipation Cover

46, 46-1: discharge port 47: guide

48: exhaust duct 49: air cleaner

51: oil cooler 60: planting apparatus

D: Eccentric distance E-1: Area of influence

E-2: Non-Right Zone R1: Fan Room

R2: Cleaner Room R3: Heat Dissipation Space

Claims (10)

delete A cooling fan installed at the rear of the engine; A fan case accommodating the cooling fan; A top cover overlaid so that a cleaner room for receiving an air cleaner is formed above the engine, The top cover may include: a cleaner cover which forms the cleaner room and is connected to the fan case so that the cleaner room and a fan room in which the cooling fan is accommodated communicate; A heat dissipation space is formed in front of the cleaner room, and the heat dissipation cover is connected to the cleaner cover to communicate the heat dissipation space with the cleaner room. At least one discharge port is provided at left and right sides of the heat dissipation cover, respectively, so that the outside air sucked into the fan room by the cooling fan is discharged to both sides through the cleaner room. The method of claim 2, wherein the top cover, And a guide provided to guide the outside air flow between the left and right discharge ports to the left and right discharge ports. The method according to claim 2 or 3, wherein each of the discharge port, Engine cooler, characterized in that formed to face downward. The method according to claim 2, Engine cooler further comprises an oil cooler installed to face the cooling fan on the outside of the fan case. The method of claim 5, wherein the oil cooler, Engine eccentricity is characterized in that the amount of the outside air sucked by the cooling fan is increased compared to when the center is located on the same straight line as the center of the cooling fan in the range that is cooled by the outside air sucked by the cooling fan. Device. The method of claim 6, wherein the oil cooler, And an engine cooling device arranged so as to extend in and outside the area of influence of the suction force of the cooling fan. delete A vehicle comprising an engine covered with a bonnet, a wheel powered by the engine and rolling in a cloud, and an engine cooler to prevent the engine from overheating; In the rice transplanter which is comprised by the planting apparatus installed in the back of this vehicle, and is planted by this planting apparatus, the said engine cooling apparatus is A cooling fan installed at the rear of the engine; A fan case accommodating the cooling fan; A top cover overlaid so that a cleaner room for receiving an air cleaner is formed above the engine, The top cover may include: a cleaner cover which forms the cleaner room and is connected to the fan case so that the cleaner room and a fan room in which the cooling fan is accommodated communicate; A heat dissipation space is formed in front of the cleaner room, and the heat dissipation cover is connected to the cleaner cover to communicate the heat dissipation space with the cleaner room. At least one discharge port is provided at left and right sides of the heat dissipation cover so that outside air sucked into the fan room by the cooling fan is discharged to both sides through the cleaner room, The rice transplanter in which the exhaust port was provided in the left and right sides of the bonnet so as to face the discharge ports on the left and right sides, respectively. The method according to claim 9, The rice transplanter is a rice transplanter, characterized in that further comprising an exhaust duct connected to the exhaust port facing the discharge port.

Images