Work machine

Abstract

To provide a work machine capable of preventing water from entering an air cleaner and allowing the air cleaner to take in air even during snowfall.SOLUTION: A work machine (100) includes vehicle bodies (1A, 1B), an engine compartment (13) mounted on the vehicle body and housing an engine (311), an air cleaner (313) mounted in the engine compartment and having an air intake port (323B), and a shielding member (324) mounted in the engine compartment, covering the upwardly opening air intake port (323B) from above, and located at a position higher than the air intake port. A vent hole (132A) making the inside communicate with the outside of the engine compartment is provided in a side of the engine compartment. The air intake port of the air cleaner is located inside the engine compartment and at a position higher than the vent hole. The shielding member is bent around a top portion (324C).SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a work machine equipped with an air cleaner. [Background technology]

[0002] 2. Description of the Related Art A wheel loader, which is an example of a work machine, has an air cleaner disposed inside an engine compartment provided in the vehicle body for cleaning the air supplied to the engine.

[0003] For example, Patent Document 1 discloses a wheel loader that includes an engine compartment that houses an engine, an air cleaner main body located in the engine compartment, an intake cylinder that is attached to the top of the air cleaner main body and protrudes upward from the top plate of the engine compartment, a cover member that has an air intake port and covers the entire intake cylinder, and a shielding member that is located within the cover member above the intake cylinder.In this wheel loader, the shielding member is located to cover the top of the intake cylinder, and rainwater and other liquids that have entered the cover member through the intake port are blocked by the shielding member, thereby preventing rainwater and other liquids from entering the air cleaner. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5449629 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the wheel loader described in Patent Document 1, the intake part that takes in air for the air cleaner is located outside the engine compartment, so when it snows, accumulated snow may block the intake port, preventing the air cleaner from taking in air.

[0006] The present invention was made in response to the current state of the prior art, and its object is to provide a work machine that prevents water from entering the air cleaner while allowing the air cleaner to take in air even during snowfall. [Means for solving the problem]

[0007] In order to achieve the above object, a representative aspect of the present invention is a work machine comprising a vehicle body, an engine compartment provided on the vehicle body and accommodating an engine therein, and an air cleaner provided in the engine compartment and having an air intake port, the work machine further comprising a shielding member provided in the engine compartment that covers the intake port, which opens upward, from above and is provided at a position higher than the intake port, a vent hole that connects the inside and outside of the engine compartment is provided on a side of the engine compartment, the intake port of the air cleaner is provided inside the engine compartment and at a position higher than the vent hole, and the shielding member is formed by being bent around its top. [Effects of the Invention]

[0008] According to the work machine of the present invention, the air cleaner can take in air even when it is snowing while preventing water from entering the air cleaner. Note that problems, configurations, and effects other than those described above will become clear from the description of the following embodiments. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing the appearance of a wheel loader according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the wheel loader. [Figure 3] FIG. 2 is a rear view of the wheel loader. [Figure 4] FIG. 1 is a perspective view of a wheel loader as viewed from above. [Figure 5] FIG. 2 is a right side view of the wheel loader showing the interior of the engine compartment. [Figure 6] FIG. 10 is a right side view showing the installation state of the shielding member. [Figure 7] FIG. 2 is a perspective view showing the positional relationship between the air cleaner and the shielding member. [Figure 8] FIG. 4 is a right side view showing the positional relationship between the air cleaner and the shielding member. [Figure 9] FIG. 10 is a plan view of the cover body to which the shielding member is attached, as viewed from above the engine compartment. [Figure 10] FIG. 10 is a right side view of the wheel loader showing the air cleaner in use in summer. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a wheel loader, which is a wheel-type work machine, will be described as an example of one aspect of a work machine according to an embodiment of the present invention.

[0011] The configuration of a wheel loader according to an embodiment of the present invention will be described with reference to Figs. 1 to 10. Fig. 1 is a side view showing the appearance of the wheel loader according to the embodiment. Fig. 2 is a plan view of the wheel loader. Fig. 3 is a rear view of the wheel loader. Fig. 4 is a perspective view of the wheel loader as seen from above.

[0012] The wheel loader 100 according to this embodiment is an articulated work machine that is steered by bending the vehicle body near the center. Specifically, as shown in Figures 1 to 4, the wheel loader 100 has a front frame 1A, which forms the front part of the vehicle body, and a rear frame 1B, which forms the rear part of the vehicle body, connected by a center joint 10 so that they can rotate freely in the left-right direction, and the front frame 1A bends in the left-right direction relative to the rear frame 1B. In the following description, within the left-right direction (vehicle width direction) of the vehicle body, the left direction relative to the forward direction will be referred to as the "left direction," and the right direction relative to the forward direction will be referred to as the "right direction."

[0013] The vehicle body is provided with four wheels 11, two of which are front wheels 11A, one on each side of the front frame 1A, and the other two are rear wheels 11B, one on each side of the rear frame 1B.

[0014] A work device 2 is attached to the front of the front frame 1A for performing loading and unloading work, such as digging up work objects such as earth and sand or minerals and loading them into a loading destination such as a dump truck or hopper.

[0015] The working device 2 has a lift arm 21 attached to the front frame 1A so as to be rotatable in the vertical direction, two lift arm cylinders 22 that drive the lift arm 21, a bucket 23 attached to the tip of the lift arm 21 so as to be rotatable in the vertical direction, a bucket cylinder 24 that drives the bucket 23, and a bell crank 25 rotatably connected to the lift arm 21 and constituting a link mechanism between the bucket 23 and the bucket cylinder 24.

[0016] The lift arm 21 rotates upward relative to the front frame 1A (raising operation) when the rods of the two lift arm cylinders 22 extend, and rotates downward relative to the front frame 1A (lowering operation) when the rods of the two lift arm cylinders 22 contract.

[0017] The bucket 23 rotates upward relative to the lift arm 21 and tilts backward (tilt operation) as the rod of the bucket cylinder 24 extends, and rotates downward relative to the lift arm 21 and tilts forward (dump operation) as the rod of the bucket cylinder 24 contracts. This allows the bucket 23 to scoop up and discharge (excavate and dump) work objects such as earth and sand or minerals.

[0018] The bucket 23 can be replaced with various attachments, such as a blade or a plow, and the wheel loader 100 can perform various tasks such as snow removal and earth-raising in addition to loading and unloading operations using the bucket 23.

[0019] The rear frame 1B is provided with an operator's cab 12 in which an operator sits, an engine compartment 13 which defines an internal storage compartment for accommodating various devices required for driving the wheel loader 100, and a counterweight 14 which maintains balance with the work implement 2 to prevent the vehicle body from tilting. On the rear frame 1B, the operator's cab 12 is located at the front, the counterweight 14 at the rear, and the engine compartment 13 between the operator's cab 12 and the counterweight 14.

[0020] The engine compartment 13 has a ceiling cover 131 that covers the upper part of the storage compartment, a pair of side covers 132 that cover the storage compartment from both the left and right sides of the vehicle body between the frame 1B and the ceiling cover 131, and a rear cover 133 that covers the storage compartment from the rear of the vehicle body between the frame 1B and the ceiling cover 131. As such, since the engine compartment 13 is made up of multiple covers (ceiling cover 131, side covers 132, rear cover 133), even inside the engine compartment 13, in the event of heavy rain or snow accumulation on the ceiling cover 131, rainwater (wash water), melted snow, etc. may seep into the engine compartment 13 through gaps and fasteners.

[0021] FIG. 5 is a right side view of the wheel loader 100 showing the inside of the engine compartment 13, with the side cover 132 open. As shown in FIG. 5, the interior of the engine compartment 13 is separated in the front-to-rear direction of the vehicle body by a partition wall 130. Inside the engine compartment 13, an engine 311 and an aftertreatment device 312 for purifying exhaust gas emitted from the engine 311 are housed in front of the partition wall 130. The aftertreatment device 312 is disposed above the engine 311 and supported from below by a support bracket 313. Therefore, the engine 311, aftertreatment device 312, and support bracket 313 are positioned in the engine compartment 13 in the following order from bottom to top. In addition, a tailpipe 314 protrudes from a portion of the ceiling cover 131 near the partition wall 130, and discharges exhaust gas purified through the aftertreatment device 312 to the outside.

[0022] Behind the partition wall 130 inside the engine compartment 13, there are housed a heat exchanger unit 321 composed of multiple heat exchangers such as a radiator that cools the cooling water of the engine 311, an oil cooler that cools the hydraulic oil, and an intercooler that cools the air pressurized by the turbocharger of the engine 311, a cooling fan 322 that generates cooling air to cool the heat exchanger unit 321, and an air cleaner 323 that purifies the air supplied to the engine 311.

[0023] Cooling fan 322 is disposed at the rear end of engine compartment 13 so that the axial direction of the rotation shaft is along the front-rear direction of the vehicle body, in other words, so that the intake and exhaust surface faces partition wall 130. Heat exchanger unit 321 is disposed adjacent to the front side of cooling fan 322. In addition, a grill 133A attached to rear cover 133 is disposed on the rear side of cooling fan 322 so as to face the intake and exhaust surface of cooling fan 322.

[0024] 1 and 4, a pair of side covers 132 on both sides of the engine compartment 13 in the left-right direction are each provided with an air vent 132A that communicates between the inside and outside of the engine compartment 13. This air vent 132A is an opening for taking air (outside air) into the engine compartment 13. Therefore, outside air flows in and out of the accommodation chamber of the engine compartment 13 through each air vent 132A and gaps around the side covers 132. Note that only the right side cover 132 of the pair of side covers 132 is shown in FIGS.

[0025] The radiator, oil cooler, and intercooler of the heat exchanger unit 321, and the cooling fan 322, respectively, operate when the engine 311 is operating. In other words, while the engine 311 is stopped, the radiator, oil cooler, and intercooler of the heat exchanger unit 321, and the cooling fan 322 are also stopped.

[0026] When the cooling fan 322 operates, the internal pressure of the engine compartment 13 becomes lower than the atmospheric pressure around the wheel loader 100. As a result, outside air is drawn into the engine compartment 13 through the ventilation holes 132A and gaps around the side cover 132, generating cooling air that flows from the front to the rear of the vehicle body. The radiator 332, which is one of the components of the heat exchanger unit 321, uses this cooling air to cool the engine coolant that has been heated by the engine 311.

[0027] Air cleaner 323 is disposed between engine 311 and heat exchanger unit 321, and has intake cylinder 323A. Intake cylinder 323A is attached to the top of air cleaner 323, and the entire air cleaner 323, including intake cylinder 323A, is housed inside engine compartment 13. Air cleaner 323 filters the air drawn in through intake cylinder 323A with an internal filter (not shown), and then supplies the air to engine 311. Intake cylinder 323A is a cylindrical member, and has air intake port 323B at its upper end that opens upward (see FIG. 7).

[0028] Furthermore, inside the engine compartment 13, a shielding member 324 is disposed above the air cleaner 323, covering the upper side of the intake port 323B of the intake cylinder 323A. The shielding member 324 is a member that prevents liquid such as rainwater that has entered the inside of the engine compartment 13 from flowing down into the intake port 323B of the intake cylinder 323A. The intake cylinder 323A of the air cleaner 323 and the shielding member 324 are disposed adjacent to the heat exchanger unit 321 and forward of the cooling fan 322. The configuration of the shielding member 324 will be described in detail below with reference to FIGS. 6 to 10.

[0029] Fig. 6 is a right side view showing the installation state of shielding member 324. Fig. 7 is a perspective view showing the positional relationship between air cleaner 323 and shielding member 324. Fig. 8 is a right side view showing the positional relationship between air cleaner 323 and shielding member 324. Fig. 9 is a plan view of the cover body to which shielding member 324 is attached, viewed from above engine compartment 13.

[0030] 6, the ceiling cover 131 covering the top of the engine compartment 13 has an upper wall inclined surface portion 13A that slopes downward from the cab 12 toward the outside of the vehicle body. By providing such an upper wall inclined surface portion 13A on the upper wall of the engine compartment 13, visibility from the cab 12 can be ensured, and rainwater, melted snow, and the like can easily flow along the upper wall inclined surface portion 13A toward the rear of the vehicle body, thereby preventing water droplets from falling onto the shielding member 324.

[0031] As shown in Fig. 9, ceiling cover 131, which constitutes the upper wall of engine compartment 13, is provided with circular opening 131A located above air cleaner 323. Opening 131A is for inserting a pipe (described later) connected to intake cylinder 323A of air cleaner 323, and is covered with lid 325 installed on ceiling cover 131. Lid 325 is detachably attached to ceiling cover 131 using a plurality of bolts 325A. Opening 131A is located on the central axis of intake cylinder 323A of air cleaner 323, and is formed with a diameter slightly larger than intake cylinder 323A.

[0032] 6 to 8, the shielding member 324 has a first inclined surface portion 324A and a second inclined surface portion 324B. The first inclined surface portion 324A and the second inclined surface portion 324B are metal plates with a V-shaped cross section that are bent in the longitudinal direction of the vehicle body around a top portion 324C, and both left and right sides of the shielding member 324 are open and not shielded. A connector 324D made of a channel steel with a U-shaped cross section is fixed to the upper surface of the second inclined surface portion 324B by welding.

[0033] Connector 324D of shielding member 324 is detachably attached to the center of the back surface of cover 325 using two bolts 326. As a result, shielding member 324 entirely covers intake port 323B of intake cylinder 323A in a plan view and is positioned higher than intake port 323B of intake cylinder 323A in a side view. Furthermore, as shown by the two-dot chain line in FIG. 6 , vent hole 132A provided in side cover 132 for taking in air is positioned lower than intake port 323B of intake cylinder 323A. In other words, intake cylinder 323A of air cleaner 323 is positioned inside engine compartment 13 and higher than vent hole 132A. This prevents water from entering intake port 323B from the left and right of the vehicle body, even if the area between shielding member 324 and air cleaner 323 is not covered with a cover or the like.

[0034] 6 is a line representing the outline of the vent hole 132A provided in the side cover 132 (a line representing the outline of the vent hole 132A when the side cover 132 is closed, projected onto a right side view showing the interior of the engine compartment 13). FIG. 6 also shows the positional relationship between the vent hole 132A provided in the side cover 132 and the intake port 323B when the side cover 132 is closed.

[0035] As described above, the cooling air generated by the operation of the cooling fan 322 flows from the front to the rear of the vehicle body inside the engine compartment 13. With respect to this flow of cooling air, the shielding member 324 is disposed above the air cleaner 323 with the first inclined surface portion 324A facing upstream of the flow.

[0036] Specifically, as shown in FIG. 8 , first inclined surface portion 324A of shielding member 324 is disposed upstream of the cooling air flow and covers a portion of the vehicle body further forward than intake cylinder 323A. Second inclined surface portion 324B of shielding member 324 is disposed downstream of the cooling air flow and covers the entire intake cylinder 323A, including intake port 323B. Here, assuming that the distance between intake cylinder 323A and the front end of first inclined surface portion 324A is L1 and the distance between intake cylinder 323A and the rear end of second inclined surface portion 324B is L2, distance L1 is set to a value sufficiently larger than distance L2. By thus allowing first inclined surface portion 324A, which is disposed upstream of the cooling air flow, to protrude far forward of intake cylinder 323A by distance L1, water that falls along the surface of first inclined surface portion 324A is less likely to flow around to the back side even when it receives the cooling air. On the other hand, for the second inclined surface portion 324B located downstream of the flow of the cooling air, the water that falls along the surface of the second inclined surface portion 324B is caught by the cooling air and flows toward the rear of the vehicle body, so that the water does not flow around to the rear side even if the distance L2 is made small. This allows the shielding member 324 to be located close to the heat exchanger unit 321 at the rear of the vehicle body, making it possible to effectively use the installation space in the engine compartment 13.

[0037] The inclination angle of first inclined surface portion 324A and second inclined surface portion 324B relative to the horizontal plane is set so that first inclined surface portion 324A is larger. That is, first inclined surface portion 324A is inclined at a steeper gradient than second inclined surface portion 324B. Note that the inclination angle of first inclined surface portion 324A relative to the horizontal plane is set to, for example, approximately 30 degrees, but can be set to any angle between horizontal and vertical as long as it is an angle that does not create resistance to the flow of cooling air and can prevent water droplets from wrapping around to the back side.

[0038] In the wheel loader 100 according to this embodiment, in winter environments, the air cleaner 323 is used as an internal intake type that takes in air from inside the engine compartment 13. In this case, as shown in Fig. 6, the air cleaner 323 including the intake cylinder 323A is housed inside the engine compartment 13, and the opening 131A provided in the ceiling cover 131 is closed by a lid 325. A shielding member 324 is attached to the lid 325, and this shielding member 324 entirely covers the intake port 323B of the intake cylinder 323A attached to the air cleaner 323.

[0039] In this way, with the internal intake type in which air is drawn in from inside the engine compartment 13, the intake port 323B of the intake cylinder 323A is not exposed to the outside, which prevents snow from clogging the intake port 323B of the air cleaner 323. Furthermore, inside the engine compartment 13, the intake port 323B of the air cleaner 323 is located at a higher position than the vent hole 132A of the side cover 132, which prevents rainwater that enters the engine compartment 13 through the vent hole 132A from reaching the intake port 323B. Furthermore, operation of the cooling fan 322 generates cooling air that flows from the front to the rear of the vehicle body, and the shielding member 324 has first inclined surface portion 324A and second inclined surface portion 324B that slope downward from the top portion 324C in the fore-and-aft direction of the vehicle body along the flow of the cooling air. This prevents water that falls from the surface of the shielding member 324 from flowing around to the back side, thereby preventing water from entering the intake port 323B.

[0040] On the other hand, in a summer environment, it is preferable for the air cleaner 323 to take in cool air from outside the engine compartment 13, so a pipe 327 is connected to the intake cylinder 323A of the air cleaner 323 and the air cleaner is used as an external intake type. Figure 10 is a right side view of the wheel loader 100 showing the air cleaner in use in summer conditions.

[0041] As shown in Figure 10, in summer environments, the air cleaner 323 is used as an external intake type by removing the shielding member 324 from the cover 325, connecting a pipe 327 to the intake cylinder 323A of the air cleaner 323, and projecting the pipe 327 above the ceiling cover 131. The pipe 327 is a cylindrical member that extends upward through the opening 131A of the ceiling cover 131, and has a cap 327A attached to its top. The cap 327A has an intake port (not shown) that opens downward, and air taken in through the intake port is introduced into the intake port 323B of the intake cylinder 323A via the pipe 327.

[0042] The procedure for connecting pipe 327 to intake cylinder 323A will be described below. First, side cover 132 is opened to expose the interior of engine compartment 13. In this state, bolt 326 is loosened to remove shielding member 324 from lid 325. Since shielding member 324 is made up of first inclined surface portion 324A and second inclined surface portion 324B that bend in the longitudinal direction of the vehicle body around top portion 324C and has a V-shaped cross section that is open in the lateral direction of the vehicle body, it can be easily removed without being obstructed by piping or the like in engine compartment 13. Next, bolt 325A is loosened to remove lid 325 from ceiling cover 131, exposing opening 131A provided in ceiling cover 131. Then, the lower end of pipe 327 is connected to intake cylinder 323A of air cleaner 323 disposed in engine compartment 13, and pipe 327 protrudes above ceiling cover 131 through opening 131A. This allows the air cleaner 323 to be used as an external intake type.

[0043] As explained above, in the wheel loader 100 according to this embodiment, the air cleaner 323, which purifies the air to be supplied to the engine 311, is housed inside the engine compartment 13, including the intake cylinder 323A, and is equipped with a shielding member 324 that covers from above the intake port 323B that opens above the intake cylinder 323A and is located higher than the intake port 323B, and a vent hole 132A that is located in the side cover 132 on the side of the engine compartment 13 and communicates between the inside and the outside of the engine compartment 13, and the intake port 323B of the air cleaner 323 is located inside the engine compartment 13 at a position higher than the intake port 323B, and the shielding member 324 is formed by a first inclined surface portion 324A and a second inclined surface portion 324B that bend in the fore-and-aft direction of the vehicle body around the top portion 324C, so that water is prevented from entering the air cleaner 323, and the air cleaner 323 can take in air even when it is snowing.

[0044] Furthermore, as described above, the engine compartment 13 is made up of multiple covers 131, 132, and 133, so rainwater (washing water), melted snow, etc. can seep into the engine compartment 13 through gaps and fasteners. However, according to this embodiment, even if water does enter the engine compartment 13, it is possible to effectively prevent water from entering the air cleaner 323.

[0045] Furthermore, in the wheel loader 100 according to this embodiment, a heat exchanger unit 321 including a radiator, and a cooling fan 322 that guides cooling air to the heat exchanger unit 321 are housed inside the engine compartment 13, and rotation of the cooling fan 322 generates cooling air that flows from the front to the rear of the vehicle body, and the first inclined surface portion 324A and the second inclined surface portion 324B of the shielding member 324 are inclined downward in the front-to-rear direction from the top portion 324C in line with the flow of the cooling air, making it easier for water to fall along the surfaces of the first inclined surface portion 324A and the second inclined surface portion 324B.

[0046] Moreover, in the wheel loader 100 according to this embodiment, the distance L1 from the front end of the first inclined surface portion 324A, which is located on the upstream side of the cooling air flow, to the intake cylinder 323A is set to be greater than the distance L2 from the rear end of the second inclined surface portion 324B, which is located on the downstream side of the cooling air flow, to the intake cylinder 323A, so that water that falls along the surface of the first inclined surface portion 324A is less likely to flow around to the back side, and it is possible to reliably prevent water from entering the air cleaner 323. Furthermore, water that falls along the surface of the second inclined surface portion 324B is hit by the cooling air and flows towards the rear of the vehicle body, and does not flow around to the back side, so by reducing the amount by which the rear end of the second inclined surface portion 324B protrudes from the intake cylinder 323A, it is possible to position the shielding member 324 in the vicinity of the heat exchanger unit 321 at the rear of the vehicle body, and it is possible to make effective use of the installation space within the engine compartment 13.

[0047] Furthermore, in the wheel loader 100 according to this embodiment, the inclination angle of the first inclined surface portion 324A, which is located forward of the apex 324C of the shielding member 324, is set to an angle between horizontal and vertical so as to be less likely to cause resistance to the flow of cooling air and to prevent water droplets from flowing around to the back side.

[0048] Furthermore, in the wheel loader 100 according to this embodiment, an opening 131A is provided in the ceiling cover 131 of the engine compartment 13 for inserting a pipe 327 connectable to the intake cylinder 323A of the air cleaner 323, and a lid 325 is provided to close the opening 131A, and a shielding member 324 is detachably attached to this lid 325 with bolts 326, so that the air cleaner 323 can be easily switched between an internal air intake type for winter environments and an external air intake type for summer environments. Moreover, because the pipe 327 cannot be connected to the intake cylinder 323A of the air cleaner 323 unless the shielding member 324 is removed from the lid 325, it is possible to prevent the shielding member 324 from being left behind when switching from an internal air intake type to an external air intake type.

[0049] Furthermore, in the wheel loader 100 according to this embodiment, the upper wall of the engine compartment 13 has an upper wall inclined surface portion 13A that slopes downward from the cab 12 towards the outside of the vehicle body, ensuring visibility from the cab 12 and allowing rainwater, melted snow, etc. to easily flow along the upper wall inclined surface portion 13A to the rear of the vehicle body, thereby preventing water droplets from falling onto the shielding member 324.

[0050] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention. The present invention covers all technical matters included in the technical ideas described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, combinations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims.

[0051] For example, in the above embodiment, a wheel loader has been described as an example of one aspect of the working machine of the present invention, but the present invention is not limited to this and may also be a hydraulic excavator or the like. [Explanation of symbols]

[0052] 1A Front frame (body) 1B Rear frame (body) 2. Work equipment 12 Driver's cab 13 Engine Room 13A Upper wall slope section 100 Wheel loader (work machine) 130 Bulkhead 131 Ceiling Cover 131A Aperture 132 Side cover 132A Ventilation hole 133 Rear cover 311 Engine 312 Post-processing device 313 Air cleaner 321 Heat Exchanger Unit (Heat Exchanger) 322 Cooling fan (fan) 323A intake cylinder 323B Air Intake 324 Shielding material 324A 1st slope section 324B 2nd slope section 324C Top 324D Connector 325 Lid 325A Volts 326 volts 327 Pipe 327A Cap

Claims

1. The car body and an engine compartment provided on the vehicle body and accommodating an engine therein; an air cleaner provided in the engine compartment and having an air intake port; In a work machine equipped with a shielding member that is provided in the engine compartment and covers the intake port, which opens upward, from above and is provided at a position higher than the intake port; A vent hole communicating the inside and outside of the engine compartment is provided on a side surface of the engine compartment, The intake port of the air cleaner is provided inside the engine compartment and at a higher position than the vent hole, The shielding member is formed by being bent around the top portion. A work machine characterized by:

2. 2. The work machine according to claim 1, A heat exchanger and a fan that guides cooling air to the heat exchanger are further accommodated inside the engine compartment, the fan generates the cooling air flowing in the front-rear direction of the vehicle body, The shielding member is inclined downward from the top in the front-rear direction along the flow of the cooling air. A work machine characterized by:

3. 3. The work machine according to claim 2, the fan generates the cooling airflow that flows from the front side to the rear side of the vehicle body, the shielding member and the air intake are disposed forward of the fan, The distance between the front end of the shielding member and the air intake port is greater than the distance between the rear end of the shielding member and the air intake port. A work machine characterized by:

4. 2. The work machine according to claim 1, an opening for inserting a pipe connectable to the intake port is provided in the upper wall of the engine compartment, and a lid for closing the opening is provided; The shielding member is detachably attached to the lid. A work machine characterized by:

5. 2. The work machine according to claim 1, a driver's cab provided on the vehicle body, the upper wall of the engine compartment has an upper wall inclined surface portion that slopes downward from the driver's cab side of the vehicle body toward the outside of the vehicle body, A work machine characterized in that the shielding member and the air intake port are disposed below the upper wall inclined surface portion.

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