JP5502498B2 - Traveling cart - Google Patents

Description

  The present invention relates to a technology of a traveling carriage.

  Conventionally, in a traveling carriage that can be mounted with various work machines such as a roll baler device, an engine is provided inside the traveling machine base supported by the traveling apparatus, and the cooling air of this engine is sent from outside the machine to the inside of the traveling machine base. Intakes for taking in are provided on the outer side and the rear side of the carriage. In this way, the traveling carriage takes in cooling air from a plurality of intakes, thereby dispersing the suction force generated at the intakes and reducing the amount of dust adhering to the dust-proof member of the intakes.

  When the work machine is mounted on the traveling carriage, depending on the type of the work machine, the work machine may be located behind the intake on the rear side surface. In this case, when dust (grass or sawdust after cutting) is generated during operation of the work machine, the dust is likely to adhere to the dust-proof member provided at the intake on the rear side surface. Therefore, it is necessary to perform maintenance such as cleaning of the dustproof member as needed.

  Therefore, the direction of the blower blades of the cooling fan (rotary fan) that takes in the cooling air from outside the machine can be changed freely, and the flow direction of the cooling air flows from the outside to the radiator that cools the engine (intake direction). A technique for switching from the radiator to the flow toward the outside of the machine (in the direction of exhaust) has been proposed. According to this technology, it is possible to switch the flow direction of the cooling air to the exhaust direction, and to blow off dust such as sawdust adhering to the dust-proof member (dust-proofing tool) of the intake port (intake port) with the cooling air, Maintenance can be performed easily. For example, it is as in known document 1.

  However, in the technique of publicly known document 1, when the flow direction of the cooling air is switched to the exhaust direction, the heated air in the engine room is sent to the radiator, so the cooling efficiency of the radiator is lowered. Therefore, in order to maintain the cooling efficiency of the radiator so as not to cause a problem in the operation of the engine, it is necessary to supply a predetermined amount of cooling air from outside the apparatus to the radiator. In other words, in order to maintain the flow rate of the cooling air from the outside necessary for cooling the engine, the time for which the flow direction of the cooling air is the exhaust direction is limited. For this reason, the dust adhering to a dustproof tool cannot fully be removed, and the state where cooling air was taken in in some cases could not be maintained.

Japanese Patent Laid-Open No. 2006-2692

  The present invention has been made in view of the problems as described above, and removes dusts and the like adhering to the dust-proof member of the intake port while maintaining the flow rate of the cooling air from the outside of the machine. An object of the present invention is to provide a traveling carriage that can maintain a state of being taken in well.

The engine, a radiator that cools the engine, a cooling fan that is rotationally driven by the engine and applies cooling air to the radiator, a duct that sucks cooling air to the cooling fan, and the duct A plurality of cooling air inlets that are opened in the air, and a dustproof member that is provided at the plurality of cooling air inlets and allows the cooling air to pass from the outside of the machine toward the radiator as the cooling fan rotates, A pipe that is taken in from the cooling air intake, sucked by the cooling fan, and immediately after passing through the cooling fan, returns the cooling air toward at least one dustproof member of the duct; The returned cooling air can be blown out and passed through at least one dustproof member in the direction opposite to the cooling air passage direction during engine cooling. Then, between the at least one dust-proof member and the pipe, when the engine is cooled, a cooling fan sucks a flow of cooling air that passes through the at least one dust-proof member and travels toward the radiator. A traveling vehicle is provided with a switching member that can be shut off, and the switching member is disposed inside the duct.

According to a second aspect of the present invention, in the traveling vehicle according to the first aspect, when the switching member does not block the flow of the cooling air, the switching member blocks the flow of the cooling air from the pipe toward the at least one dustproof member. is there.

  As effects of the present invention, the following effects can be obtained.

Since it comprised like Claim 1, the cooling air taken in from the some intake port can be sent to a at least 1 dustproof member from a radiator side via piping.
As a result, when the amount of dust adhering to at least one dustproof member increases to a predetermined amount or more, the amount of cooling air taken from at least one intake port decreases, and instead, at least one cooling air from the pipe It passes through the dustproof member and is discharged out of the machine through at least one intake port.

  And the cooling wind from piping continues to pass until the dust adhering to at least 1 dustproof member reduces less than predetermined amount. At this time, since cooling air is taken in from another intake port, the cooling air is continuously supplied to the radiator. As a result, dust such as soot adhering to the dust-proof member of the intake port can be easily removed while maintaining the flow rate of the cooling air from the outside of the machine, and the state where the cooling air can be satisfactorily taken in can be maintained.

Further , in a state where the flow of the cooling air taken in from at least one intake is blocked, the cooling air taken in from the other intake can be sent from the radiator side to at least one dustproof member.
As a result, dust such as soot adhering to the dust-proof member of the intake port can be removed while improving efficiency.

Since it comprised like Claim 2, in addition to the effect of the invention which concerns on Claim 1, the flow of the cooling air taken in from at least 1 intake is not inhibited by the cooling air sent from the radiator side.
As a result, the flow of the cooling air taken from at least one intake port is not hindered when dust such as soot and dust adhering to the dustproof member is not removed.

1 is an overall side view showing a traveling vehicle according to a first embodiment of the present invention. 1 is an overall rear view showing a traveling carriage according to a first embodiment of the present invention. 1 is an overall top view showing a traveling carriage according to a first embodiment of the present invention. The side view which shows the state which equipped the traveling trolley which concerns on 1st embodiment of this invention with the roll baler apparatus. The rear view which shows the cooling air duct which concerns on 1st embodiment of this invention. The left view which shows the cooling air duct which concerns on 1st embodiment of this invention. The perspective view which shows the cooling wind duct and switching member which concern on 1st embodiment of this invention. (A) The left view which shows the mode of the flow of the cooling air in case the switching member which concerns on 1st embodiment of this invention exists in an opening position. (B) The left view which shows the mode of the flow of the cooling air in case the switching member which concerns on 1st embodiment of this invention exists in a closed position. (A) The left view which shows the mode of the flow of the cooling air in case the switching member which concerns on 2nd embodiment of this invention exists in an opening position. (B) The left view which shows the mode of the flow of the cooling air in case the switching member which concerns on 2nd embodiment of this invention exists in a closed position.

  First, the overall configuration of the traveling carriage 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the following, the front, rear, left, right, up and down directions are defined with the arrow A direction as the front direction.

  The traveling cart 1 is loaded with various work machines such as a roll baler device and works by the work machine while traveling. The traveling carriage 1 includes a traveling unit 10, an operation unit 20, a prime mover unit 30, and the like with respect to the traveling machine base 9.

  As shown in FIGS. 1 and 2, the traveling unit 10 makes the traveling machine base 9 movable. The traveling unit 10 is provided in the lower part of the traveling machine base 9. The traveling unit 10 includes a crawler-type traveling device 11 having a pair of left and right crawlers 11a, and is configured to allow the traveling machine base 9 to travel in the forward or reverse direction.

  As shown in FIGS. 1 to 3, the operation unit 20 operates the traveling unit 10, the prime mover unit 30, a work machine (not shown), and the like. The operation unit 20 is arranged on the right side of the front part of the traveling machine base 9 and on the right side of the engine 31 described later. The operation unit 20 includes a steering handle 21, a driver seat 22, a clutch lever 23, and the like.

  A handle column 21a is disposed in front of the operation unit 20 and substantially in the center of the left and right, and the steering handle 21 is disposed on the upper surface thereof. A driver seat 22 is disposed behind the steering handle 21. A protector 24 that protects the driver is disposed on the right side of the driver's seat 22. A side column 25 is erected on the left side of the driver's seat 22 and a clutch lever 23 and the like are disposed on the upper surface thereof. As described above, the operation unit 20 is configured such that the driver is seated on the driver's seat 22 and the driver can operate the devices of the respective units with the operation tools.

  As shown in FIGS. 2 and 3, the prime mover unit 30 transmits power to the traveling unit 10 and a working machine (not shown). The prime mover unit 30 includes an engine 31, a transmission 32, a fuel tank 33, a counter unit, and the like, and is provided on the traveling machine base 9.

  The engine 31 is a front part of the traveling machine base 9 and is an approximately part in an engine room that includes an arch-shaped support frame 9a that is erected in a side view and a connection frame 9b that connects the support frame 9a. Located in the center part. A transmission 32 is disposed in front of the engine 31 and between the pair of left and right crawlers 11a. Before the power of the engine 31 is supplied to each device such as the traveling unit 10, the power can be shifted by the transmission 32. A fuel tank 33 and the like are disposed on the left side of the engine 31, and a counter unit for transmitting power to a working machine such as a roll baler device is disposed behind the fuel tank 33 and the like.

  In this way, the traveling carriage 1 transmits the power of the engine 31 of the prime mover unit 30 to the working unit such as the traveling unit 10 or the roll baler device by the operation of the operation tool in the operation unit 20, and the traveling unit 10 Thus, various operations can be performed while the traveling machine base 9 is traveling.

  Next, the roll baler apparatus 40 which is one embodiment of the working machine equipped in the traveling carriage 1 configured as described above will be described with reference to FIG. In the following, the front, rear, left, right, up and down directions are defined with the arrow A direction as the front direction.

  As shown in FIG. 4, the roll baler apparatus 40 cuts a feed crop and forms a roll bale. The roll baler device 40 includes a cutting unit 41, a conveying unit 42, a forming unit 43, and the like.

  The mowing unit 41 harvests forage crops. The cutting unit 41 includes a cover 411, a drive shaft 412, a flail blade 413, a fixed blade 414, and the like, and is disposed in front of the traveling machine base 9.

  The cutting unit 41 is pivotally supported in the cover 411 so that the drive shaft 412 can turn in the horizontal direction. On the drive shaft 412, flail blades 413 are radially arranged at predetermined intervals and at predetermined angles. A fixed blade 414 is disposed in the cover 411 so as to face the flail blade 413 in the horizontal direction. As a result, the flare blade 413 can cut the napped feed crop (butterfly), and generates a conveyance wind toward the conveyance unit 42 by rotation, so that the cut forage crop jumps into the conveyance unit 42. Configured to raise.

  The conveyance part 42 conveys the forage crop cut by the cutting part 41 to a shaping | molding part. The transport unit 42 includes a transport duct 421, a support arm 422, a swing shaft 423, an elevating cylinder 424, and the like, and is disposed on the front upper side of the traveling machine base 9.

  One side end of the transport duct 421 is fixed so as to communicate with the rear upper side surface of the cutting unit 41. The transfer duct 421 extends from the one side end portion toward the rear upper side, and is formed in a substantially inverted J shape in a side view. The other end portion of the transport duct 421 is inserted into the molding portion 43 from the front upper surface of the molding portion 43 as a cut-off port 42a for the cut crop. Thereby, the conveyance part 42 is comprised so that the forage crop harvested by the cutting part 41 can be thrown in in the shaping | molding part 43 through the conveyance duct 421 with conveyance wind.

  On the rear side surface of the transport duct 421, a support arm 422 is erected substantially horizontally toward the rear, and the rear end portion is provided on the connecting frame 9b of the traveling machine base 9 so that the axial direction is the left-right direction. 423 is pivotally supported. In addition, an elevating cylinder 424 is provided on the rear side surface of the transport duct 421 so that the expansion and contraction direction is substantially vertical, and is connected to the front end portion of the traveling machine base 9. Therefore, the cutting portion 41 fixed to one end of the transport duct 421 and the transport duct 421 is configured to be rotatable up and down around the swing shaft 423 by extending and retracting the lifting cylinder 424. . The lift cylinder 424 is provided with a lift position detection sensor 425 that detects the lift position of the cutting part 41 from the amount of expansion / contraction of the lift cylinder 424 as a detection device that detects the lift position of the cutting part 41.

  The shaping | molding part 43 shape | molds the cut forage crop into a roll bale. The molding unit 43 includes a stationary housing 431, an opening / closing housing 432, a swing shaft 433, an opening / closing cylinder 434, a roll bale forming device 435, and the like, and is formed at the rear portion on the traveling machine base 9 behind the engine 31. Be placed.

  The molding part 43 is configured by a fixed housing 431 and an opening / closing housing 432 in a front / rear split shape. The opening / closing side housing 432 is pivotally supported by a swing shaft 433 provided with a front upper end portion thereof provided at a rear upper end portion of the fixed side housing 431 and having an axial direction as a horizontal direction. An open / close cylinder 434 is provided on the upper side surface of the fixed-side housing 431 with the expansion / contraction direction as the front-rear direction, and is connected to the upper side surface of the open / close-side housing 432. Therefore, the open / close housing 432 is configured to be openable and closable about the swing shaft 433 by expanding and contracting the open / close cylinder 434. A transport duct 421 (a discharge port 42 a of the transport unit 42) is inserted as an input port 43 a for harvested feed crops on the front upper side surface of the fixed housing 431.

  Inside the forming portion 43, a plurality of rotating rollers 436 that are axially supported in the left-right direction are arranged in a substantially C shape when viewed from the side, and a roll bale forming device 435 whose opening is directed to the inlet 43a. Is configured. The plurality of rotating rollers 436 are configured to be rotatable in the same direction by power transmitted from the engine 31 via a counter unit (not shown). Therefore, the forage crops input from the input port 43a are input to the inside of the roll bale forming device 435 and formed on the cylinder by the plurality of rotating rollers 436. The newly introduced feed crop is sequentially wound around the outer diameter portion of the feed crop already formed on the cylinder inside the roll bale forming device 435 and formed into a roll bale having a predetermined outer diameter.

  A plurality of rotating rollers 436 constituting the rear portion of the roll bale forming device 435 are disposed in the open / close housing 432. That is, the rear portion of the roll bale forming device 44 is opened and closed with the opening and closing of the opening and closing side housing 432. That is, the roll bale forming device 435 is configured to be able to discharge the formed roll bale to the outside of the apparatus.

  The open / close cylinder 434 is provided with an open / closed state detection sensor 437 that detects the open / closed state of the open / close side housing 432 based on the amount of expansion / contraction of the open / close cylinder 434 as a release detection device that detects the release of the roll bale. It is configured to detect the release of the roll bale by detecting the open state of the open / close housing 432 that is opened when the roll bale is released.

  As described above, in the traveling cart 1, the prime mover unit 30 is disposed at the front portion of the traveling machine base 9 disposed at the upper portion of the traveling unit 10, and the operation unit 20 is disposed on the right side thereof. A roll baler device 40 is disposed at the rear of the traveling machine base 9. In this manner, the traveling cart 1 transmits the power of the engine 31 of the prime mover unit 30 to the traveling unit 10 and the roll baler device 40 by the operation of the operation tool in the operation unit 20, and the traveling unit 10 The roll bale device 40 is configured so that the roll bale can be formed and discharged while the table 9 is traveling.

  Next, the configuration of the prime mover unit 30 will be specifically described with reference to FIGS. 2 and 5 to 7.

  As shown in FIG. 2, the engine 31 of the prime mover unit 30 includes an intake unit 311 and an exhaust unit 312, and a radiator 34 and the like are provided as a cooling device.

  The intake unit 311 purifies outside air and sends it to the engine 31. The intake unit 311 includes an air cleaner 311a, an intake passage 311b, an air supply manifold (not shown), and the like. The air cleaner 311a is disposed behind the operation unit 20, and is connected to an intake manifold (not shown) of the engine 31 through an intake passage 311b.

  The exhaust unit 312 is for discharging exhaust to the outside. The exhaust unit 312 includes a muffler 312a, a tail pipe 312b, an exhaust manifold (not shown), and the like. The muffler 312a is disposed above the engine 31, and an exhaust manifold (not shown) is connected to one end thereof. The other end of the muffler 312a is connected to a tail pipe 312b that extends to the left side of the traveling machine base 9 and is separated from the operation unit 20. On the right side of the engine 31, a cooling fan 31a that is rotationally driven by the power from the engine 31 is provided.

  The radiator 34 cools the cooling water of the main body of the engine 31 with cooling air. The radiator 34 is disposed on the right side of the engine 31 and is disposed opposite to the cooling fan 31 a that is rotationally driven by power from the engine 31. A cooling air duct 35 is disposed on the right side of the radiator 34. The radiator 34 is configured such that cooling air from the outside of the apparatus is sent to the radiator 34 by the rotation of the cooling fan 31a.

  The cooling air duct 35 constitutes a passage for guiding cooling air from the outside to the radiator 34. The cooling air duct 35 is disposed on the right side of the radiator 34 and below the driver seat 22 of the operation unit 20.

  As shown in FIGS. 5 to 7, a cooling air outlet 35 a is formed on the left side surface of the cooling air duct 35 so as to face the radiator 34. A first intake port 35 b is formed on the right side surface of the cooling air duct 35, and a second intake port 35 c is formed on the rear side surface of the cooling air duct 35. That is, a plurality of intake ports 35 b and 35 c having different opening directions are formed on the side surface of the cooling air duct 35. The first intake port 35b is provided with a dustproof member 36b, and the second intake port 35c is provided with a dustproof member 36c. The dust-proof members 36b and 36c are configured so as to allow only cooling air to pass therethrough and prevent dust such as sawdust from passing therethrough.

  In accordance with the rotation of the cooling fan 31a, the cooling air duct 35 passes through the first intake 35b and the dust-proof members 36b and 36c of the second intake 35c and the radiator from the cooling air outlet 35a. 34 to be sent.

  The cooling air duct 35 is provided with a switching member 38 for switching between a state where the flow of the cooling air taken from the second intake port 35c is blocked and a state where the flow is not blocked. The switching member 38 is formed in a substantially trapezoidal box shape in a side view, and the larger bottom surface is opened. However, the shape in a side view is not limited, and it may be configured in a triangular shape or a semicircular shape.

  The switching member 38 is formed such that the area of the larger bottom surface is larger than that of the second intake port 35c, that is, the large bottom surface covers the entire second intake port 35c, and the larger bottom surface is the second intake surface. It arrange | positions inside the cooling air duct 35 so that it may closely_contact | adhere to the inlet 35c. That is, the switching member 38 is disposed so that the second intake port 35c is covered with the switching member 38 and the flow of cooling air taken from the second intake port 35c is blocked.

  A swing shaft 38 a is fixed to the upper end portion of the switching member 38 so as to penetrate the switching member 38 in the left-right direction. The switching member 38 is pivotally supported at both end portions of the swing shaft 38a by a support member 35d that protrudes from the upper surface of the cooling air duct 35 to the inside of the cooling air duct 35. The left end portion of the swing shaft 38a extends to the outside of the cooling air duct 35, and a large-diameter gear 38b is fixed to the end portion, and meshes with a small-diameter gear 39a fixed to the output shaft of the drive motor 39 described later. Is done.

  The switching member 38 is in a state where the flow of the cooling air taken in from the second intake port 35c by the operation of the drive motor 39 is cut off (hereinafter simply referred to as “closed position”) (see FIG. 8B), and the switching member 38. With the rocking shaft 38a as the rocking center, it is swung clockwise from the closing position and separated from the second intake port 35c, so that the flow of cooling air taken in from the second intake port 35c is not blocked (hereinafter, referred to as “cooling air flow”). (Referred to simply as “open position”) and (see FIG. 8A).

  A cooling air inlet 38 c is formed on the left side surface of the switching member 38. Further, when the switching member 38 is in the closed position, a pipe connection port 35e is formed on the left side surface of the cooling air duct 35 that overlaps with the cooling air inlet 38c. When the switching member 38 is in the open position, the cooling air inlet 38c is close to the rear side end of the left side surface of the switching member 38 so that the pipe connection port 35e is not blocked by the left side surface of the switching member 38. It is formed. One end of the pipe 37 is connected to the pipe connection port 35e. The other end of the pipe 37 is arranged on the left side of the cooling fan 31a with the opening facing the cooling fan 31a (upstream in the flow direction of the cooling air) (see FIG. 2).

  A drive motor 39 that switches the position of the switching member 38 is disposed on the left side surface of the cooling air duct 35. A small diameter gear 39 a is fixed to the output shaft of the drive motor 39. The small-diameter gear 39a meshes with the large-diameter gear 38b of the swing shaft 38a, so that the output shaft of the drive motor 39 and the swing shaft 38a of the switching member 38 are linked and connected. Therefore, the drive motor 39 is configured to switch the switching member 38 between the closed position and the open position. The drive motor 39 is wired to an operation tool provided in the operation unit 20 and is configured to be operable via the operation tool. The switching member 38 is interlocked and connected to the open / close side housing 432 of the roll baler device 40 by a wire or a link mechanism. When the open / close side housing 432 is opened, the switching member 38 is switched to the closed position, and the open / close side housing 432 is closed. Then, it is good also as a structure which can be switched to an opening position.

  Next, the operation | movement aspect of the switching member 38 is demonstrated using FIG.

  When a working machine (not shown) mounted on the traveling carriage 1 is operated, the load on the engine 31 increases and the fuel consumption increases. Along with this, the coolant temperature of the engine 31 rises. Therefore, as shown in FIG. 8A, the switching member 38 is switched to the opening position by the drive motor 39 in order to efficiently take in the cooling air from the outside by the rotation of the cooling fan 31a.

  As shown in FIG. 8 (a), when the switching member 38 is in the open position, the cooling air inlet 38c is positioned in front of the pipe connection port 35e. It will be in the state which does not overlap with the left side surface of 38. Therefore, the cooling air after passing through the radiator 34 sent from the pipe 37 to the pipe connection port 35e is cooled in a portion of the pipe connection port 35e that does not overlap the left side surface of the switching member 38 and in the pipe connection port 35e. It flows in the direction of the hatching arrow through the portion overlapping with the air inlet 38 c and is sent into the cooling air duct 35. Then, it flows in the direction of the white arrow together with the cooling air from outside the machine taken in from the first intake port 35b and the second intake port 35c, and is sent to the radiator 34 again. Therefore, the dustproof member 36c allows the cooling air to pass from the outside of the machine toward the radiator 34.

  When a work machine such as the roll baler device 40 is operated, dust such as sawdust is generated. Along with this, dust is sucked together with the cooling air taken in from the second intake port 35c of the cooling air duct 35 and adheres to the dust-proof member 36c. When the amount of dust adhering to the dustproof member 36c increases, the flow rate of the cooling air taken from the second intake port 35c decreases. Therefore, as shown in FIG. 8B, the switching member 38 is closed by the drive motor 39 in order to remove the dust adhering to the second intake port 35c and increase the flow rate of the cooling air taken from outside the apparatus. Switch to position. At this time, the cooling air is mainly taken from the first intake port 35 b and sent to the radiator 34.

  As shown in FIG. 8B, when the switching member 38 is in the closed position, the pipe connection port 35e overlaps with the cooling air supply port 38c. That is, the pipe connection port 35e and the cooling air supply port 38c communicate with each other. Therefore, the cooling air after passing through the radiator 34 sent from the pipe 37 to the pipe connection port 35 e flows in the hatching arrow direction through the cooling air inlet 38 c and is sent into the switching member 38. Therefore, the dustproof member 36c allows the cooling air to pass in the direction opposite to the flow direction of the cooling air taken from outside the apparatus. As a result, the dust adhering to the dustproof member 36c is blown off by the cooling air and removed from the dustproof member 36c.

  As described above, the traveling vehicle 1 that is the first embodiment of the traveling vehicle according to the present invention is the engine 31, the radiator 34 that cools the engine 31, and the cooling that is rotationally driven by the engine 31 and applies cooling air to the engine 31. A dust-proof member 36b that is provided in the fan 31a, the first intake port 35b and the second intake port 35c for each of the plurality of cooling airs, and allows the cooling air to pass from the outside of the device toward the radiator 34 as the cooling fan 31a rotates. 36c, and a pipe 37 for sending the cooling air taken in from the first intake 35b and the second intake 35c from the radiator 34 side to the dust-proof member 36c, and the cooling air from the pipe 37 is dust-proof. The member 36c is allowed to pass in the direction opposite to the passage direction of the cooling air from the outside of the machine.

  By comprising in this way, the cooling air taken in from the 1st inlet 35b and the 2nd inlet 35c can be sent via the piping 37 to the dust-proof member 36c from the radiator 34 side. As a result, when the amount of dust adhering to the dustproof member 36c increases to a predetermined amount or more, the amount of cooling air taken from the second intake port 35c decreases, and instead, the cooling air from the pipe 37 passes through the dustproof member 36c. Then, it is discharged out of the machine from the second intake port 35c. The cooling air from the pipe 37 passes through the dust-proof member 36 until the amount of dust attached to the dust-proof member 36c decreases below a predetermined amount. At this time, since the cooling air is taken in from the first intake port 35b, the cooling air is continuously supplied to the radiator 34. As a result, it is possible to remove dust such as soot and dust adhering to the dust-proof member 36c of the second intake port 35c while maintaining the flow rate of the cooling air from the outside of the machine, and to maintain a state where the cooling air can be satisfactorily taken in. it can. In addition, the cooling air from the pipe 37 can pass through the intake port facing the work machine side, not the intake port not facing the work machine side among the plurality of intake ports 35b and 35c having different opening directions. The cooling air from the pipe 37 can be passed through the dust-proof member 36c to which dust easily adheres, that is, the dust-proof member 36c with relatively high dust removal frequency, and the dust can be efficiently removed from the dust-proof member 36c.

  Further, it is provided between the dust-proof member 36c and the pipe 37, and includes a switching member 38 that can block the flow of cooling air from the outside of the machine through the dust-proof member 36c of the second intake port 35c toward the radiator 34. is there.

  By configuring in this way, in addition to the above-described effects, the cooling air can be sent from the radiator 34 side to the dust-proof member 36c in a state where the flow of the cooling air taken in from the second intake port 35c is blocked. As a result, dust such as soot adhering to the dust-proof member 36c of the second intake port 35c can be removed while improving efficiency.

  Below, the traveling vehicle 2 which is 2nd embodiment of the traveling vehicle which concerns on this invention is demonstrated using FIG. 2 and FIG. Note that, in the following embodiments, the same points as those of the first embodiment described above are denoted by the same reference numerals, the detailed description thereof will be omitted, and differences will be mainly described.

  As shown in FIG. 2, the cooling air duct 55 constitutes a passage for guiding the cooling air from the outside to the radiator 34. The cooling air duct 55 is disposed on the right side of the radiator 34 and below the driver seat 22 of the operation unit 20.

  As shown in FIG. 9, a cooling air outlet 55 a is formed on the left side surface of the cooling air duct 35 so as to face the radiator 34. A first intake port 55 b is formed on the right side surface of the cooling air duct 55, and a second intake port 55 c is formed on the rear side surface of the cooling air duct 55. A dustproof member 56b is provided at the first intake 55b, and a dustproof member 56c is provided at the second intake 55c. The dustproof members 56b and 56c are configured so as to allow only cooling air to pass therethrough and prevent dust such as soot from passing therethrough.

  As the cooling fan 31a rotates, the cooling air duct 55 passes through the first intake port 55b and the dust-proof members 56b and 56c of the second intake port 55c and the radiator from the cooling air outlet port 55a. 34 to be sent.

  The cooling air duct 55 is provided with a switching member 58 that switches between a state where the flow of the cooling air taken from the second intake port 55c is blocked and a state where the flow is not blocked. The switching member 58 is formed in a substantially trapezoidal box shape when viewed from the side, and the larger bottom surface is opened. However, the shape in a side view is not limited, and it may be configured in a triangular shape or a semicircular shape.

  The switching member 58 is formed such that the area of the larger bottom surface is larger than that of the second intake port 55c, that is, the large bottom surface covers the entire second intake port 55c, and the larger bottom surface is the second intake surface. It arrange | positions inside the cooling air duct 55 so that it may closely_contact | adhere with the inlet_port | entrance 55c. That is, the switching member 58 is disposed so that the second intake 55c is covered with the switching member 58 and the flow of cooling air taken from the second intake 55c is blocked.

  A cooling air inlet 58 c is formed on the left side surface of the switching member 58. When the switching member 58 is in the closed position, a pipe connection port 55e is formed on the left side surface of the cooling air duct 55 that overlaps with the cooling air inlet 58c. At this time, when the switching member 58 is in the open position, the cooling air inlet 58c is formed in the vicinity of the front end of the left side surface of the switching member 58 so that the pipe connection port 55e is closed by the left side surface of the switching member 58. Is done.

  Next, the operation | movement aspect of the switching member 58 is demonstrated using FIG.

  As shown in FIG. 9A, when the switching member 58 is in the open position, the cooling air inlet 58c is positioned in front of the pipe connection port 55e, and therefore the pipe connection port 55e is connected to the cooling air inlet 58c. Without overlapping, the switching member 58 is closed by the rear portion of the left side surface. Therefore, the flow of the cooling air after passing through the radiator 34 sent from the pipe 37 to the pipe connection port 55e is blocked. That is, only the cooling air from the outside flows in the direction of the white arrow and is sent to the radiator 34. Accordingly, the dust-proof member 56c of the second intake port 55c is not affected by the cooling air from the pipe 37, so that the cooling air efficiently passes from the outside of the machine toward the radiator 34.

  As shown in FIG. 9B, when the switching member 58 is in the closed position, the pipe connection port 55e is overlapped with the cooling air supply port 58c. That is, the pipe connection port 55e and the cooling air supply port 58c communicate with each other. Therefore, the cooling air after passing through the radiator 34 sent from the pipe 37 to the pipe connection port 55e flows in the hatching arrow direction through the cooling air inlet 58c without being blocked by the left side surface of the switching member 58, and is switched. It is sent to the inside of the member 58. Therefore, the dustproof member 56c allows the cooling air to pass in the direction opposite to the flow direction of the cooling air taken from outside the apparatus. As a result, the dust adhering to the dustproof member 56c is blown off by the cooling air and removed from the dustproof member 56c.

  As described above, the traveling carriage 2 that is the second embodiment of the traveling carriage according to the present invention blocks the flow of cooling air from the pipe 37 toward the dust-proof member 56c when the switching member 58 does not block the flow of cooling air. Is.

  With this configuration, in addition to the above-described effects, the flow of cooling air taken from the second intake port 55c is not hindered by the cooling air sent from the radiator 34 side. As a result, the flow of the cooling air taken in from the second intake 55c is not hindered when dust such as sawdust adhering to the dustproof member 56c is not removed.

DESCRIPTION OF SYMBOLS 1 Traveling carriage 31 Engine 31a Cooling fan 34 Radiator 35b 1st inlet 35c 2nd inlet 36c Dust-proof member 37 Piping 38 Switching member

Claims (2)

An engine, a radiator that cools the engine, a cooling fan that is rotationally driven by the engine and that applies cooling air to the radiator, a duct that sucks the cooling air to the cooling fan, and a plurality of cooling openings that are open in the duct A wind inlet, and a dustproof member that is provided at the plurality of cooling air inlets and allows the cooling air to pass from the outside of the machine toward the radiator as the cooling fan rotates,
A pipe that is taken in from the cooling air intake, sucked by the cooling fan, and returns the cooling air immediately after passing through the cooling fan toward at least one dustproof member of the duct;
The cooling air returned by the pipe can be blown out toward at least one dustproof member in a direction opposite to the passage direction of the cooling air during engine cooling.
Between the at least one dustproof member and the pipe, when the engine is cooled, the cooling fan sucks the cooling air and passes through the at least one dustproof member to block the flow of cooling air toward the radiator. A traveling vehicle characterized by comprising: a switching member, wherein the switching member is disposed inside the duct . 2. The traveling vehicle according to claim 1, wherein when the switching member does not block the flow of the cooling air, the switching member blocks the flow of the cooling air from the pipe toward the at least one dustproof member. A featured traveling cart.

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