Work machine

Abstract

The present disclosure relates to a work machine. The work machine according to the present disclosure comprises: a machine body having a revolving substrate and an engine compartment formed on the revolving substrate; an engine housed in the engine compartment; a cooling fan for generating cooling air for cooling the engine; and a straightening body for straightening the cooling air flowing between the engine and the inside surface of a partition plate in the engine compartment. In the work machine, the revolving substrate is arranged at the lower part of the machine body. In the working machine, the straightening body is inserted into a space between the engine and the inside surface from below the machine body through an opening formed in the revolving substrate, and is fixed to the lower surface of the revolving substrate.

Description

Work equipment

[0001] The present invention relates to a work machine such as a backhoe. This application claims priority to Japanese Application No. 2023-142851, filed September 4, 2023, and incorporates by reference all of the contents of said Japanese application.

[0002] A known working machine is disclosed in Patent Document 1. The working machine disclosed in Patent Document 1 is a backhoe that includes a rotating base, a motor compartment formed on the rotating base, a motor housed in the motor compartment, and a cooling fan that generates cooling air to cool the motor within the motor compartment. The working machine cools the motor by circulating cooling air between the motor and a partition plate that divides the motor compartment.

[0003] Japanese Patent Application Laid-Open No. 2019-019574

[0004] A work machine according to one aspect of the present disclosure comprises a body having a base plate and a prime mover compartment formed on the base plate, a prime mover housed in the prime mover compartment, a cooling fan that generates cooling air to cool the prime mover, and a flow rectifier that rectifies the cooling air flowing between the inner wall of the prime mover compartment and the prime mover, wherein the base plate is disposed below the body, and the flow rectifier is inserted into the space between the prime mover and the inner wall from below the body through an opening formed in the base plate and is fixed to the underside of the base plate.

[0005] The present disclosure can ensure maintainability of a flow regulator in a work machine in which a flow regulator is provided below a prime mover in a prime mover compartment.

[0006] FIG. 1 is a perspective view showing an outline of a work machine according to an embodiment of the present disclosure. FIG. 2 is a right side view showing an outline of a work machine according to an embodiment of the present disclosure. FIG. 3 is a partial plan view showing an outline of a work machine according to an embodiment of the present disclosure. FIG. 4 is a perspective view showing a machine body. FIG. 5 is a perspective view showing a swivel frame. FIG. 6 is a cross-sectional schematic view showing the arrangement of a flow regulator in an engine compartment. FIG. 7 is a perspective view showing a flow regulator. FIG. 8 is a perspective view showing the state of attachment of the flow regulator to the swivel base plate (as viewed from above). FIG. 9 is a perspective view showing the swivel base plate (as viewed from above) with the flow regulator and inspection panel removed. FIG. 10 is a perspective view showing the state of attachment of the flow regulator to the swivel base plate (as viewed from below). FIG. 11 is a perspective view showing the state of attachment of a flow regulator to the swivel base plate (as viewed from below) according to another embodiment.

[0007] <Problem to be Solved by the Invention> A known working machine has a configuration in which a flow regulator is disposed in a motor compartment to ensure the cooling efficiency of the motor by cooling air. The flow regulator regulates the flow of cooling air in the motor compartment. Such a flow regulator may be disposed below the motor in the motor compartment. In this case, the flow regulator is located behind the motor, making it difficult for the user to access the flow regulator. For this reason, it is difficult to ensure ease of maintenance with a flow regulator disposed below the motor in the motor compartment.

[0008] The present disclosure aims to ensure ease of maintenance of a flow regulator in a work machine in which the flow regulator is provided below the prime mover in a prime mover compartment.

[0009] Effect of the Invention According to the work machine of the present disclosure, in a work machine in which a flow regulator is provided below the prime mover in the prime mover compartment, it is possible to ensure ease of maintenance of the flow regulator.

[0010] <Outline of Embodiments of the Present Disclosure> The following is a list and description of outlines of embodiments of the present disclosure. (1) A work machine of the present disclosure includes a body having a base plate and a prime mover compartment formed on the base plate, a prime mover housed in the prime mover compartment, a cooling fan that generates cooling air to cool the prime mover, and a flow rectifier that rectifies the cooling air flowing between an inner wall of the prime mover compartment and the prime mover, wherein the base plate is disposed below the body, and the flow rectifier is inserted into a space between the prime mover and the inner wall from below the body through an opening formed in the base plate and is fixed to the underside of the base plate.

[0011] In a work machine having the above configuration, the flow regulator can be extracted below the machine body. Therefore, with a work machine having the above configuration, it is possible to ensure the ease of maintenance of the flow regulator in a work machine in which the flow regulator is provided below the prime mover in the prime mover compartment.

[0012] (2) In the work machine according to the aspect (1), the flow rectifier preferably includes a main body having a shape that occupies at least a portion of the space when inserted into the space, and a flange that is located below the base plate and contacts the underside of the base plate around the opening when the main body is inserted into the space, and the flange is fixed to the underside of the base plate by a fixing member that is detachable from the underside of the base plate. In the work machine configured as described above, the flow rectifier can be extracted below the body by removing the fixing member from the underside of the body. Therefore, with the work machine configured as described above, it is possible to ensure the maintainability of the flow rectifier in a work machine in which the flow rectifier is provided below the prime mover in the prime mover compartment.

[0013] (3) In the working machine according to the above-described (1) or (2), it is preferable that a first rib and a second rib are provided on the base plate in the engine compartment, the first rib and the second rib being parallel to each other and perpendicular to the inner wall, and the flow straightener is inserted into a range of the space between the first rib and the second rib. With a working machine configured in this manner, the flow straightener can straighten the cooling air flowing around the first rib and the second rib.

[0014] (4) In the work machine according to the embodiment (3), the inner wall, the first rib, and the second rib preferably include sealing portions that seal gaps between them and the flow straightener. A work machine configured in this manner can suppress cooling air from flowing into gaps between the inner wall and the flow straightener and gaps between the first rib and the second rib and the flow straightener. According to a work machine configured in this manner, the flow straightener can reliably straighten the cooling air flowing around the first rib and the second rib.

[0015] (5) In the working machine according to any one of (1) to (4), it is preferable that the inner wall extends in the left-right direction of the machine body. According to a working machine having such a configuration, in a working machine having a horizontally mounted prime mover and a flow regulator provided below the prime mover in the prime mover compartment, it is possible to ensure the ease of maintenance of the flow regulator.

[0016] (6) In the working machine according to any one of (1) to (5), it is preferable that the cooling fan blows the cooling air in a direction substantially parallel to the inner wall. In a working machine equipped with a horizontally-mounted prime mover and a flow regulator provided below the prime mover in the prime mover compartment, the prime mover can be reliably cooled by the cooling air.

[0017] (7) In the work machine according to any one of (1) to (6), it is preferable that the work machine further includes an inspection hatch formed in the base plate for inspecting the prime mover, and an inspection panel installed on the underside of the base plate to cover the inspection hatch, and the flow regulator is configured integrally with the inspection panel. In a work machine configured in this manner, the flow regulator can be attached and detached at the same time as the inspection panel is attached and detached. With a work machine configured in this manner, the flow regulator can be easily maintained in a work machine in which the flow regulator is provided below the prime mover in the prime mover compartment.

[0018] (8) In the work machine according to the embodiment (7), it is preferable that the opening is included as part of the inspection hatch. In a work machine configured in this manner, the opening can also be used as an inspection hatch for the prime mover. According to a work machine configured in this manner, in a work machine in which a flow regulator is provided below the prime mover in the prime mover compartment, it is possible to improve the maintainability of the prime mover.

[0019] <Details of the embodiments of the present disclosure> Hereinafter, the details of the embodiments of the present disclosure will be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any manner.

[0020] [Overall Configuration of Work Machine] FIG. 1 is a perspective view showing an outline of a work machine 10 according to an embodiment of the present disclosure. FIG. 2 is a right side view showing an outline of the work machine 10 according to an embodiment of the present disclosure. FIG. 3 is a partial plan view showing an outline of the work machine 10 according to an embodiment of the present disclosure. FIGS. 1 to 3 show the work machine 10, which is an embodiment of the work machine of the present disclosure. The work machine 10 illustrated in this embodiment is a backhoe. As shown in FIG. 1, the work machine 10 includes a body 11, a traveling device 12, a work device 13, a cabin 14, and a driver's seat 15 located within the cabin 14. Note that the work machine 10 may be configured to include a canopy instead of the cabin 14.

[0021] In the following description, the direction toward the front of the operator seated in the driver's seat 15 will be referred to as the front of the work machine 10, and the direction toward the rear will be referred to as the rear, with the fore-and-aft direction of the work machine 10 indicated by arrow X. In addition, in the following description, the direction toward the left of the operator seated in the driver's seat 15 will be referred to as the left of the work machine 10, and the direction toward the right will be referred to as the right of the work machine 10, with the left-and-right direction of the work machine 10 indicated by arrow Y. The left-and-right direction of the work machine 10 will also be referred to as the width direction. In addition, in the following description, the up-and-down direction of the work machine 10 will be indicated by arrow Z. The up-and-down direction of the work machine 10 is perpendicular to the fore-and-aft direction and the left-and-right direction.

[0022] As shown in FIGS. 1 to 3 , the travelling device 12 is a crawler-type travelling device that supports the machine body 11 so that it can travel. The travelling device 12 includes a first travelling device 12L provided on the left side of the machine body 11 and a second travelling device 12R provided on the right side. The first travelling device 12L and the second travelling device 12R are driven by a hydraulic motor 12M. In this embodiment, a crawler-type travelling device 12 is used, but the configuration of the travelling device in the work machine disclosed herein is not limited to this, and a wheel-type travelling device or other type of travelling device may also be used. The work machine 10 further includes a dozer device 16. The dozer device 16 is provided in front of the travelling device 12. Note that the dozer device 16 may be provided at the front or rear of the work machine 10.

[0023] 2 , the machine body 11 is mounted on the traveling device 12 via a swivel bearing 17. The swivel bearing 17 supports the machine body 11 relative to the traveling device 12. The machine body 11 is configured to be rotatable around a swivel axis C of the swivel bearing 17.

[0024] As shown in Figures 1 and 2, the work machine 10 is provided with a support bracket 20 and a swing bracket 21 at the front of the machine body 11, which support the work device 13. The support bracket 20 is part of the revolving frame 30 and is provided to protrude forward of the machine body 11. The support bracket 20 is provided with a through hole extending in the vertical direction and a vertical shaft member inserted into the through hole. The swing bracket 21 is supported by the vertical shaft member of the support bracket 20 and is configured to be swingable around the vertical shaft member. The swing bracket 21 swings in accordance with the extension and contraction of the swing cylinder 25. The swing bracket 21 is provided with a first horizontal shaft member extending in a direction perpendicular to the vertical direction.

[0025] The working device 13 includes a boom 22, an arm 23, and a bucket 24. The base of the boom 22 is supported by the first horizontal shaft member of the swing bracket 21 and is rotatable about the first horizontal shaft member. The boom 22 swings in response to the extension and contraction of a boom cylinder 26. The boom 22 includes a second horizontal shaft member at its tip end that extends in a direction perpendicular to the up-down direction. The arm 23 is supported by the second horizontal shaft member of the boom 22 and is rotatable about the second horizontal shaft member. The arm 23 swings in response to the extension and contraction of an arm cylinder 27. The arm 23 includes a third horizontal shaft member at its tip end that extends in a direction perpendicular to the up-down direction. The bucket 24 is supported by the third horizontal shaft member of the arm 23 and is rotatable about the third horizontal shaft member. The bucket 24 swings in response to the extension and contraction of a bucket cylinder 28. The swing cylinder 25, the boom cylinder 26, the arm cylinder 27, and the bucket cylinder 28 are configured by hydraulic cylinders (hydraulic actuators). Note that the work implement 10 may be configured to be able to attach another work implement (hydraulic attachment) instead of the bucket 24.

[0026] [Regarding the Airframe] Figure 4 is a perspective view showing the airframe 11. As shown in Figures 2 to 4, the airframe 11 includes an engine (prime mover) E, a cooling fan F, a fuel tank T, a revolving frame 30, and a cover 40. The revolving frame 30 and the cover 40 form the outer shell of the airframe 11. The airframe 11 is equipped with the engine E, the cooling fan F, the fuel tank T, and various other devices inside the outer shell formed by the revolving frame 30 and the cover 40.

[0027] The engine E is a drive source that drives each part of the work machine 10. In this embodiment, the engine E is a diesel engine. However, the engine E may also be a gasoline engine. Furthermore, in this embodiment, an engine (internal combustion engine) is exemplified as the prime mover, but the prime mover that constitutes the work machine of the present disclosure may also be an electric motor, or may be a hybrid type having an engine and an electric motor. The engine E is mounted at the rear of the machine body 11 with the output shaft J oriented in the left-right direction.

[0028] The cooling fan F is rotated by the drive of the engine E and generates cooling air CW. The cooling fan F is fixed on the output shaft J of the engine E. In this embodiment, the cooling fan F is disposed on the right side of the engine E. The cooling fan F draws air from the right side of the aircraft body 11 and directs it toward the engine E, generating cooling air CW that flows from right to left.

[0029] The fuel tank T stores fuel (diesel) for the engine E. The fuel tank T is disposed in front of the engine E.

[0030] Although detailed description will be omitted in this description, the machine body 11 further includes various devices, not shown, such as a radiator, oil cooler, fuel cooler, swing motor, battery, hydraulic pump, exhaust gas purification device, air cleaner, hydraulic oil tank, and control valve. The radiator is a cooler that cools the coolant for the engine E. The oil cooler is a cooler that cools the hydraulic oil returning from hydraulic actuators such as hydraulic cylinders and hydraulic motors. The fuel cooler is a cooler that cools the fuel. These coolers are cooled by cooling air CW generated by a cooling fan F. The swing motor is a drive source that drives the machine body 11 around the swing axis C. The battery supplies power to electrical components mounted on the work machine 10. The hydraulic pump is driven by the power of the engine E and discharges hydraulic oil that drives the hydraulic motor, hydraulic cylinders, etc., as well as pilot pressure that operates hydraulic valves and hydraulic pressure for signals. The exhaust gas purification device is a device (DPF) that purifies exhaust gas emitted from the engine E. The air cleaner is a device that purifies the air supplied to the engine E. The hydraulic oil tank is a tank that stores hydraulic oil, and the hydraulic oil is sent from the hydraulic oil tank to the hydraulic pump. The control valve controls the flow rate of hydraulic oil that is supplied from the hydraulic pump to the hydraulic actuator.

[0031] 3 and 4, the cover 40, together with the revolving frame 30, constitutes the outer shell of the machine body 11. The cover 40 covers the front, rear, left, right, and top surfaces of the machine body 11. The cover 40 is configured to include a plurality of covers. The cover 40 of this embodiment includes a total of nine types of covers (first cover 40A to ninth cover 40I).

[0032] The first cover 40A is disposed at the front right side of the aircraft 11. The second cover 40B extends rearward and upward from the top of the first cover 40A and covers the top of the fuel tank T. The second cover 40B is configured to be openable and closable and is used for refueling the fuel tank T and for inspecting and maintaining the fuel tank T. The third cover 40C covers the right side of the fuel tank T. The third cover 40C is configured to be openable and closable and is used for inspecting and maintaining the fuel tank T. The fourth cover 40D is disposed at the rear right side of the aircraft 11. The fourth cover 40D has an outside air intake 41 formed therein for drawing outside air into the fourth cover 40D. Air (cooling air CW) drawn in by the cooling fan F is introduced through the outside air intake 41. The fifth cover 40E covers the right side of the engine E and above the cooling fan F. The sixth cover 40F and the seventh cover 40G cover the rear of the engine E. The sixth cover 40F is disposed in an opening 43 formed in the seventh cover 40G. The seventh cover 40G is supported on the sixth cover 40F via a hinge (not shown). The seventh cover 40G opens and closes the opening 43. The eighth cover 40H is disposed at the rear left side of the fuselage 11. The ninth cover 40I is disposed below the eighth cover 40H.

[0033] [Rotating Frame] Figure 5 is a perspective view showing the rotating frame 30. As shown in Figure 4, the rotating frame 30, together with the cover 40, constitutes the outer shell of the machine body 11. The rotating frame 30 constitutes the lower part of the machine body 11. As shown in Figure 5, the rotating frame 30 includes a rotating base plate (base plate) 31, reinforcing ribs 32, weights 33, and support brackets 20. Note that the rotating frame 30 also has brackets and stays (neither of which are shown) for attaching various devices and components mounted on the machine body 11, but these will not be shown or described here.

[0034] The swivel base plate 31 constitutes the lower part of the swivel frame 30. In other words, the swivel base plate 31 constitutes the lower part of the machine body 11. The swivel base plate 31 is made of a thick steel plate or the like, and has an upper surface 31a and a lower surface 31b. The swivel base plate 31 is used in an orientation in which the upper surface 31a faces upward and the lower surface 31b faces downward. As shown in FIG. 2 , the swivel base plate 31 is supported by the traveling device 12 via the swivel bearing 17. The swivel base plate 31 is configured to be rotatable around the rotation axis C of the swivel bearing 17.

[0035] As shown in Figure 5, the swivel frame 30 has reinforcing ribs 32. The reinforcing ribs 32 reinforce the swivel frame 30, ensuring a desired strength. The reinforcing ribs 32 are made of steel plate. The reinforcing ribs 32 are erected on the upper surface 31a of the swivel base plate 31, extending in the front-to-rear direction. The reinforcing ribs 32 include a first rib 32a provided on the upper surface 31a toward the left side, and a second rib 32b provided on the upper surface 31a toward the right side.

[0036] 1, 2, and 5, the support bracket 20 constitutes a part of the swivel frame 30. The support bracket 20 is fixed to the front part of the reinforcing rib 32 and supports the working device 13. The weight 33 is attached to the rear part of the swivel base plate 31 and constitutes the rear part of the machine body 11.

[0037] As shown in FIG. 5 , the rotating frame 30 further includes a partition plate 34. The partition plate 34 is made of a steel plate and is erected midway in the front-to-rear direction on the upper surface 31 a. The partition plate 34 extends in the left-to-right direction so as to be perpendicular to the first rib 32 a and the second rib 32 b. The partition plate 34 divides the interior space of the aircraft body 11, which is covered by the cover 40 (see FIG. 4 ), and forms an engine compartment (motor compartment) ER behind the partition plate 34. In the following description, the rear side surface of the partition plate 34 will be referred to as the inner surface 35. The flow direction of the cooling air CW generated by the cooling fan F is approximately parallel to the inner surface 35.

[0038] The swivel frame 30 further includes a sealing portion 36. The sealing portion 36 is configured by a plate-like member extending from each surface of the partition plate 34, the first rib 32a, and the second rib 32b in a direction perpendicular to the surfaces.

[0039] The rotating frame 30 further includes an opening 37 and an inspection hatch 38. The opening 37 and the inspection hatch 38 pass through the rotating base plate 31 in the vertical direction. The opening 37 and the inspection hatch 38 communicate between the outside (below) of the machine body 11 and the inside of the machine body 11 (the engine compartment ER, which will be described later).

[0040] The opening 37 is an opening for inserting a flow regulator 50 (see FIG. 7) described later into the interior of the body 11. The opening 37 is sealed when the flow regulator 50 is placed therein.

[0041] The inspection hatch 38 is an opening used when inspecting the engine E housed in the engine compartment ER. The inspection hatch 38 is sealed by the placement of an inspection panel 60 (see FIG. 10 ), which will be described later. The rotating frame 30 is also provided with an exhaust section 39 consisting of a number of holes for discharging the cooling air CW and exhaust from the exhaust gas purification device to the outside of the aircraft body 11. The inspection panel 60 is also provided with an exhaust section 61 consisting of a number of holes for discharging the cooling air CW and exhaust from the exhaust gas purification device to the outside of the aircraft body 11.

[0042] [Detailed Configuration of the Engine Compartment] Figure 6 is a cross-sectional schematic diagram showing the arrangement of the flow regulator 50 in the engine compartment ER. As shown in Figure 6, the partition plate 34 divides the space within the aircraft body 11 to form the engine compartment ER. The engine compartment ER is a space surrounded by the rotating base plate 31 located below, the partition plate 34 and front plate 45 located forward, the upper plate 46 located above, the covers 40 located on the left and right sides, and the weight 33 located rearward. The engine compartment ER houses the engine E.

[0043] The engine E is housed in the engine compartment ER with the output shaft J facing in the left-right direction. In other words, in the work machine 10 of this embodiment, the engine E is of a horizontally mounted type. In the work machine 10, the inner surface 35 of the partition plate 34 extends in the left-right direction of the machine body 11. The partition plate 34 faces the front side of the horizontally mounted engine E.

[0044] The aircraft body 11 has a space A in the engine compartment ER. The space A is located within the engine compartment ER between the partition plate 34 and the front plate 45 and the engine E. The space A is surrounded below by the swivel base plate 31 and above and on the left and right sides by the cover 40. The space A serves as a passage through which a portion of the cooling air CW generated by the cooling fan F passes. The front side of the engine E is cooled by the cooling air CW flowing through the space A from right to left.

[0045] [Regarding the Flow Rectifier] FIG. 7 is a perspective view showing the flow regulator 50. As shown in FIG. 7, the flow regulator 50 includes a main body 51 and a flange 52. The flow regulator 50 is made of steel plate. The main body 51 has a rectangular parallelepiped shape and includes a first side plate 51a, a second side plate 51b, a third side plate 51c, a fourth side plate 51d, a fifth side plate 51e, and a sixth side plate 51f. The main body 51 is used with the first side plate 51a facing upward, the second side plate facing forward, the third side plate facing downward, the fourth side plate 51d facing backward, the fifth side plate 51e facing left, and the sixth side plate 51f facing right. The main body 51 is inserted into space A within the body 11. In the following description, the space within space A occupied by the main body 51 when the main body 51 is inserted into space A will be referred to as space B.

[0046] The flange 52 is disposed at the bottom of the main body 51. The flange 52 is disposed around the third side plate 51c. When the flow rectifier 50 is viewed from a direction perpendicular to the first side plate 51a, the flange 52 has a shape that protrudes outward from the first side plate 51a. The outer shape of the flange 52 is larger than the outer shape of the opening 37 (see FIG. 6). Therefore, the flange 52 does not enter the interior of the machine body 11 through the opening 37. Note that although the flow rectifier 50 shown in this embodiment has a generally rectangular parallelepiped shape as a whole, the shape of the flow rectifier that constitutes the work machine 10 of the present disclosure is not limited to this.

[0047] [Regarding the Mounting State of the Flow Regulator in the Aircraft Body] Fig. 8 is a perspective view showing the mounting state of the flow regulator 50 on the swivel base plate 31 (as viewed from above). Fig. 9 is a perspective view showing the swivel base plate 31 (as viewed from above) with the flow regulator 50 and inspection panel 60 removed. Fig. 10 is a perspective view showing the mounting state of the flow regulator 50 on the swivel base plate 31 (as viewed from below). As shown in Figs. 6 and 8 to 10, the opening 37 is provided at a position that communicates between the outside (below) of the airframe 11 and the space A in the engine compartment ER. The flow regulator 50 is inserted into the opening 37 from below the airframe 11.

[0048] The flow regulator 50 has its main body 51 inserted into the interior (space A) of the body A through the opening 37. The main body 51 is inserted to a predetermined depth into space A. When inserted to the predetermined depth into space A, the main body 51 occupies space B, which is a portion of space A. When the main body 51 is inserted to the predetermined depth into space A, the flange 52 of the flow regulator 50 is positioned outside the body 11. At this time, the flange 52 contacts the lower surface 31b around the opening 37. The flange 52 is fastened to the lower surface 31b of the swivel base plate 31 by bolts (fixing members) 53. The flow regulator 50 is fixed to the lower surface 31b of the swivel base plate 31 by the bolts 53. The flow regulator 50 can be attached and detached from the opening 37 by attaching and detaching the bolts 53.

[0049] 10 , the flow rectifier 50 can be extracted from the opening 37 below the machine body 11 by releasing the fastening of the bolts 53. Therefore, even if the work machine 10 of this embodiment is configured so that the user cannot reach the flow rectifier 50 from the inside of the machine body 11 (above and to the left and right sides), the user can access the flow rectifier 50 from below the machine body 11 and remove the flow rectifier 50 from the machine body 11.

[0050] As shown in Figures 6 and 8 to 10, the inspection hatch 38 is provided directly below the engine E mounted in the engine compartment ER. The inspection hatch 38 is an opening used when inspecting the engine E, and is sealed by an inspection panel 60. The inspection panel 60 is fastened to the underside 31b of the swivel base plate 31 by bolts 62. The inspection hatch 38 can be opened and closed by attaching and detaching the bolts 62.

[0051] In the work machine 10 of this embodiment, the flow regulator 50 has a main body 51 inserted from below the machine body 11 into space A between the engine E and the partition plate 34 through the opening 37, and a flange 52 fixed to the underside 31b around the opening 37. When the main body 51 is inserted into space A, it occupies space B, which is a part of space A. When the main body 51 is inserted into space B, the flange 52 is located below the swivel base plate 31 and comes into contact with the underside 31b of the swivel base plate 31 around the opening 37. The flange 52 is fixed to the underside 31b of the swivel base plate 31 by bolts 53 that are detachable from the underside 31b of the swivel base plate 31.

[0052] For example, in a conventional work machine, if a flow regulator is located below the engine compartment, it is difficult for the user to access the flow regulator located behind the engine, even if the top and left and right covers of the machine are removed. Therefore, in a conventional work machine, a flow regulator located below the engine compartment is difficult to maintain. On the other hand, as shown in FIG. 6 , in the work machine 10 of this embodiment, the flow regulator 50 is located below the engine compartment ER, but can be extracted below the machine body 11. Furthermore, in the work machine 10 of this embodiment, the flow regulator 50 can be extracted below the machine body 11 by removing the bolts 53 fastened to the underside 31b of the machine body 11, without the need to remove fixing members such as bolts in the engine compartment ER. Therefore, the work machine 10 of this embodiment, which is equipped with the flow regulator 50, can ensure ease of maintenance of the flow regulator 50, even when the flow regulator 50 is located below the engine E in the engine compartment ER.

[0053] [Regarding the rectification effect of the cooling air by the flow straightener] The cooling efficiency of the engine E decreases as the wind speed of the cooling air CW blowing on the engine E decreases. Furthermore, the engine E is properly cooled by blowing the cooling air CW at a desired position on the engine E. The work machine 10 is provided with a flow straightener 50 to increase the wind speed of the cooling air CW blowing on the engine E and to blow the cooling air CW at a desired position on the engine E. By providing the flow straightener 50 inside the space A, the work machine 10 of the present disclosure reduces the cross-sectional area of ​​the space A in the flow direction of the cooling air CW, thereby ensuring the wind speed of the cooling air CW. Furthermore, by providing the flow straightener 50 inside the space A, the work machine 10 of the present disclosure rectifies the flow of the cooling air CW so that it blows at a desired position on the engine E.

[0054] The work machine 10 places the flow straightener 50 in space B, which is part of space A. Space B is part of the range of space A sandwiched between the first rib 32a and the second rib 32b. In the work machine 10, the flow straightener 50 occupies space B of space A. In this case, the cooling air CW flowing through space A does not flow through space B. Therefore, the cross-sectional area of ​​space A as a flow path for the cooling air CW is reduced by the area of ​​space B.

[0055] Furthermore, by filling the space B with the flow straightener 50, the work machine 10 can suppress collision between the cooling air CW and the reinforcing rib 32. When the cooling air CW collides with the reinforcing rib 32, the flow is disturbed and dispersed, reducing the amount of air that hits the desired position on the engine E. By occupying the space B between the first rib 32a and the second rib 32b with the flow straightener 50, the work machine 10 can suppress contact between the cooling air CW and the reinforcing rib 32. Therefore, the work machine 10 can ensure the amount of cooling air CW that hits the desired position on the engine E. This can suppress a decrease in the cooling efficiency of the engine E.

[0056] [Effect of Sealing Portion] Furthermore, in the work machine 10, the partition plate 34 (inner surface 35), the first rib 32a, and the second rib 32b include sealing portions 36. When the main body portion 51 is inserted into space B of space A, the sealing portions 36 seal gaps that exist between the main body portion 51 and the inner surface 35, the first rib 32a, and the second rib 32b.

[0057] For example, if there is a gap between the main body portion 51 and the inner surface 35, the first rib 32a, and the second rib 32b, the cooling air CW may flow in an unexpected direction through the gap, which may reduce the volume of the cooling air CW that contributes to cooling the engine E. By providing the sealing portion 36, the work machine 10 of this embodiment can prevent the cooling air CW flowing along the first side plate 51a and the second side plate 51b of the main body portion 51 from flowing between the main body portion 51 and the partition plate 34 (inner surface 35), the first rib 32a, and the second rib 32b. Therefore, by providing the sealing portion 36, the work machine 10 can prevent a reduction in the volume of the cooling air CW. According to the work machine 10 configured in this manner, the flow straightener 50 and the sealing portion 36 can reliably straighten the cooling air CW flowing along the main body portion 51, thereby ensuring the volume of the cooling air CW that contributes to cooling the engine E.

[0058] [Regarding another embodiment of the flow regulator] Fig. 11 is a perspective view showing a state in which a flow regulator 50 according to another embodiment is attached to a swivel base plate 31 (as viewed from below). Fig. 11 shows a flow regulator 50 according to another embodiment. As shown in Fig. 11, in the work machine 10 of the present disclosure, the flow regulator 50 may be configured as an integral part with an inspection panel 60. The inspection panel 60 shown in Fig. 11 is expanded forward to include a portion corresponding to the flange 52 (see Fig. 10). In the flow regulator 50 shown in Fig. 11, the portion corresponding to the flange 52 (see Fig. 10) and the inspection panel 60 are configured as an integral part. In the flow regulator 50 shown in Fig. 11, a main body 51 is provided on the inspection panel 60.

[0059] As shown in Figure 11 , when a flow regulator 50 according to another embodiment is employed, the opening 37 and the inspection hatch 38 may be formed as a single unit. In other words, in the work machine 10 of the present disclosure, the opening 37 may be provided as part of the inspection hatch 38. In the rotating frame 30 shown in Figure 11 , the inspection hatch 38 is enlarged forward so as to include a portion corresponding to the opening 37 (see Figure 10 ).

[0060] In a work machine 10 equipped with such a flow regulator 50 and inspection hatch 38 according to another embodiment, when inspecting the engine E, the flow regulator 50 can be removed simply by removing the inspection panel 60, thereby reducing the effort required to separately remove the flow regulator 50. Furthermore, in a work machine 10 configured in this manner, the number of bolts 62 fastening the inspection panel 60 to the underside 31b can be reduced, thereby reducing the effort required to remove the flow regulator 50 and the inspection panel 60. For this reason, a work machine 10 equipped with a flow regulator 50 and inspection hatch 38 configured as shown in FIG. 11 improves the maintainability of the flow regulator 50 compared to when the flow regulator 50 according to the embodiment described above is employed.

[0061] Furthermore, in the work machine 10 configured as described above, the area of ​​the inspection hatch 38 is increased by the combined amount of the elimination of the partition (see FIG. 10) between the opening 37 and the inspection hatch 38 and the area corresponding to the opening 37 (see FIG. 10), which provides more room for maneuvering tools when inspecting the engine compartment ER, enabling inspection work to be carried out efficiently. Therefore, the work machine 10 equipped with the flow regulator 50 and inspection hatch 38 configured as shown in FIG. 11 improves the maintainability of the engine E compared to when the flow regulator 50 according to the above-described embodiment is used.

[0062] The above-described embodiments are illustrative in all respects and are not limiting. The scope of the present invention is defined by the claims rather than the above-described embodiments, and includes all modifications within the scope equivalent to the configurations described in the claims.

[0063] REFERENCE SIGNS LIST 10 Work machine 31 Swivel base plate (base plate) 31b Underside 32 Reinforcement rib 32a First rib 32b Second rib 34 Partition plate 35 Inner surface 36 Sealing portion 37 Opening 38 Inspection hatch 50 Flow regulator 51 Main body 52 Flange 53 Bolt (fixing member) 60 Inspection panel E Engine (prime mover) ER Engine compartment (prime mover compartment) A Space B Space

Claims

1. A machine having a substrate and a prime mover chamber formed on the substrate, The prime mover housed in the aforementioned prime mover chamber, A cooling fan that generates cooling air to cool the prime mover, A rectifying fluid that straightens the cooling air flowing between the inner wall of the motor chamber and the motor, Equipped with, The circuit board is located at the bottom of the machine body. The aforementioned fluid is A work machine that is inserted from below the machine body into the space between the prime mover and the inner wall through an opening formed in the substrate, reducing the cross-sectional area of ​​the cross section that intersects the direction of the cooling airflow in the space, and is fixed to the lower surface of the substrate to seal the opening, and straightens the cooling airflow through the space so that it is directed towards the prime mover.

2. The aforementioned fluid is A main body having a form that occupies at least a part of the space when inserted into the space, With the main body inserted into the space, a flange portion is located below the substrate and in contact with the lower surface of the substrate around the opening, Equipped with, The aforementioned flange portion is The work machine according to claim 1, which is fixed to the lower surface of the substrate by a fixing member that is detachable from the lower surface of the substrate.

3. The first rib and the second rib, which are parallel to each other and perpendicular to the inner wall, are provided on the substrate inside the engine chamber. The aforementioned fluid is The work machine according to claim 1 or claim 2, which is inserted into the area of ​​the space sandwiched between the first rib and the second rib.

4. A machine having a substrate and a prime mover chamber formed on the substrate, The prime mover housed in the aforementioned prime mover chamber, A cooling fan that generates cooling air to cool the prime mover, A rectifying fluid that straightens the cooling air flowing between the inner wall of the motor chamber and the motor, Equipped with, The circuit board is located at the bottom of the machine body. The aforementioned fluid is It is inserted from below the machine body into the space between the prime mover and the inner wall through an opening formed in the substrate, and is fixed to the lower surface of the substrate. A work machine wherein the inner wall, the first rib, and the second rib are provided with sealing portions that seal the gap between them and the fluid.

5. The inner wall extends in the left-right direction of the machine body, according to any one of claims 1, 2, and 4.

6. The aforementioned cooling fan A work machine according to any one of claims 1, 2, and 4, wherein the cooling air is sent in a direction substantially parallel to the inner wall.

7. An inspection port is formed in the circuit board for the purpose of inspecting the prime mover, The system further comprises an inspection panel that covers the inspection opening and is installed on the lower surface of the substrate, The work machine according to any one of claims 1, 2, and 4, wherein the fluid regulator is integrally configured with the inspection panel.

8. The work machine according to claim 7, wherein the opening is included in part of the inspection opening.