CN221345723U - Excavator - Google Patents

Abstract

The utility model provides an excavator capable of reliably avoiding the interference of a pipe. The shovel (100) is provided with a lower traveling body (1) and an upper revolving body (3) provided rotatably with respect to the lower traveling body (1). The shovel (100) further comprises: a fan (17) which is provided on the upper revolving unit (3) and can control the air blowing direction based on the hydraulic pressure; a hydraulic pipe (20) connected to the fan (17) and capable of supplying hydraulic pressure; a cooling unit (70) capable of exchanging heat with air and cooling the internal structure of the upper revolving unit (3) with the air supply; and a guide member (80) provided in the cooling unit (70) and guiding the hydraulic piping (20).

Description

Excavator

Technical Field

The present application claims priority based on japanese patent application No. 2022-205816 filed on day 2022, 12 and 22. The entire contents of this japanese application are incorporated by reference into the present specification.

The present utility model relates to an excavator having a fan and a cooling unit.

Background

Patent document 1 discloses an excavator including an engine, a fan, and a cooling unit in an upper revolving structure. The shovel blows air (cooling air) having passed through a radiator of the cooling unit along with rotation of the fan into the shroud and toward the engine via the fan, thereby cooling the engine.

Patent document 1: japanese patent laid-open publication No. 2019-173389

However, since various facilities are disposed on the upper revolving structure, the arrangement of various pipes is limited according to the layout of the facilities. For this reason, for example, it is desirable to dispose a pipe between the radiator and the fan of the cooling unit.

However, since the air blown along with the rotation of the fan swings the pipe, the pipe may interfere with the fan or the radiator. In this way, if the pipe interferes with the fan or the radiator, the pipe is broken or the fan or the radiator is broken.

Disclosure of utility model

The utility model provides an excavator, which can easily arrange a pipe between a fan and a cooling unit.

According to one aspect of the present utility model, there is provided an excavator having: a lower traveling body; an upper revolving structure provided rotatably with respect to the lower traveling structure; a fan provided in the upper revolving unit, the fan being capable of controlling the air blowing direction based on hydraulic pressure; a hydraulic pipe connected to the fan and capable of supplying hydraulic pressure; a cooling unit configured to exchange heat with the air and cool the structure inside the upper revolving structure with the air blown; and a guide member provided in the cooling unit and guiding the hydraulic pipe.

Effects of the utility model

According to the shovel of one aspect, the pipe can be easily arranged between the fan and the cooling unit.

Drawings

Fig. 1 is a side view showing an excavator according to an embodiment of the present utility model.

Fig. 2 is a plan view showing a schematic structure of the upper revolving structure.

Fig. 3 is an enlarged side cross-sectional view showing an upper portion of the fan and the cooling unit.

Fig. 4 is a perspective view showing the hydraulic piping and the guide member.

Fig. 5 (a) is a side cross-sectional view showing a state of the hydraulic pipe when the blowing direction of air is the 1 st direction. Fig. 5 (B) is a side cross-sectional view showing a state of the hydraulic pipe when the blowing direction of the air is the 2 nd direction.

In the figure: 1-lower traveling body, 3-upper revolving body, 11-engine, 17-fan, 20-hydraulic piping, 34-engine room, 70-cooling unit, 71-shroud, 72-radiator, 80-guide member, 831-support plate, 832-holding portion, 833-bending portion.

Detailed Description

Hereinafter, modes for carrying out the present utility model will be described with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and overlapping description may be omitted.

First, an overall structure of an excavator 100 according to an embodiment of the present utility model will be described with reference to fig. 1. Fig. 1 is a side view showing an excavator 100 according to an embodiment of the present utility model.

In the following description, the X direction, the Y direction, and the Z direction shown in fig. 1 are directions perpendicular to each other, and typically, the X direction and the Y direction are horizontal directions, and the Z direction is a vertical direction. The X direction is the front-rear direction of the shovel 100, the front side is the X positive direction, and the rear side is the X negative direction. The Y direction is the left-right width direction of the shovel 100, the right side is the Y positive direction, and the left side is the Y negative direction. The Z direction is the height direction of the shovel 100, the upper side is the positive Z direction, and the lower side is the negative Z direction.

The shovel 100 includes a crawler-type lower traveling body 1 that can be self-propelled, and an upper revolving body 3 rotatably mounted on the lower traveling body 1 via a revolving mechanism 2.

A boom 4 is attached to the upper revolving unit 3. An arm 5 is attached to the tip end of the boom 4, and a bucket 6 as a termination attachment is attached to the tip end of the arm 5. The boom 4, the arm 5, and the bucket 6 constitute a work attachment.

The boom 4 is attached to the revolving frame 31 so as to be capable of tilting. The boom 5 is rotatably attached to the front end side of the boom 4. The bucket 6 is rotatably attached to the front end side of the arm 5.

The boom cylinder 7 is disposed between the swing frame 31 and the boom 4. By this boom cylinder 7, the boom 4 is tilted with respect to the revolving frame 31. The arm cylinder 8 is disposed between the boom 4 and the arm 5. By this arm cylinder 8, the arm 5 is rotated with respect to the boom 4. The bucket cylinder 9 is disposed between the bucket 6 and the arm 5. By this bucket cylinder 9, the bucket 6 rotates with respect to the arm 5.

The upper revolving structure 3 is rotatably provided on the lower traveling body 1 via a revolving mechanism 2. The upper revolving structure 3 is provided with a cockpit 10, an engine 11, a revolving frame 31, a counterweight (counter weight) 32, an outer cover 33, a cooling unit 70 (see fig. 2), and the like.

The cockpit 10 is provided on the revolving frame 31 and includes a driver's seat (not shown) therein. The operator sits on a cab in the cab 10, and performs a steering operation of the shovel 100.

The counterweight 32 is provided for weight balancing with the work attachment. The outer cover 33 and the hood 34a cover the engine 11, the cooling unit 70, and the like mounted in the engine compartment 34.

Fig. 2 is a plan view showing a schematic structure of upper revolving unit 3. Fig. 2 shows a state in which the hood 34a is removed to illustrate the interior of the engine room 34.

The upper revolving structure 3 includes a hydraulic oil tank 35, a fuel tank 36, and a urea water tank 37 on the front right side of the inside of the upper revolving structure 3. The hydraulic oil tank 35 stores hydraulic oil used in the hydraulic system. The fuel tank 36 is disposed in front of the working fuel tank 35 and stores diesel engine fuel such as light diesel oil. Diesel engine fuel stored in the fuel tank 36 is supplied to the engine 11 via a fuel supply pipe, not shown. The urea water tank 37 is disposed in front of the fuel tank 36, and stores a treatment agent (urea aqueous solution (liquid reducing agent)) used by the exhaust gas treatment device. The treatment agent stored in the urea water tank 37 is supplied to the exhaust gas treatment device through a treatment agent supply pipe, not shown. The urea aqueous solution (liquid reducing agent) is an example of the treating agent, and other treating agents may be used as the liquid reducing agent or other treating methods may be used.

As shown by a one-dot chain line in fig. 2, upper revolving unit 3 includes an engine room 34 at the rear portion thereof. The engine 11, the hydraulic pump 14, the cooling unit 70, and the like are provided inside the engine room 34. The engine 11 is fixed to a revolving frame 31 of the upper revolving unit 3. Although not shown in fig. 2, the engine room 34 may be provided with other devices such as an exhaust gas treatment device, an air cleaner, and a supercharger.

The engine room 34 is provided with a fan 17 that blows air between the cooling unit 70 and the engine 11. Specifically, the fan 17 is disposed on the negative Y direction side of the engine 11. The negative Y direction side of the engine is an upstream side of the air blowing direction (1 st direction DW 1) of the engine 11 in the normal state (when the engine 11 is cooled). That is, when the engine 11 is cooled during the operation of the shovel 100, air flows from the Y negative direction side to the Y positive direction side by the rotation of the fan 17.

The fan 17 has a boss portion 18 at the rotation center and a plurality of louver plates 19 radially extending from the boss portion 18. The rotation shaft 17X of the fan 17 is coupled to the boss 18.

The rotation shaft 17X of the fan 17 is coupled to the rotation shaft of the engine 11 via a rotation transmission mechanism, not shown. That is, the fan 17 is rotationally driven by the engine 11 as a drive source. The rotation transmission mechanism may be appropriately configured by gears, pulleys, belts, or the like. The fan 17 may be rotationally driven by another driving source such as a motor, not shown.

The fan 17 according to the present embodiment is configured to be able to control the air blowing direction based on the supply of the hydraulic pressure (so-called reversible fan). Specifically, a hydraulic pipe 20 is connected to the boss portion 18, and hydraulic pressure is supplied to the boss portion 18 at an appropriate timing via the hydraulic pipe 20 (see also fig. 3). The inclination angle of the plurality of louvers 19 with respect to the boss portion 18 changes according to the supply of the hydraulic pressure. Thus, the rotation direction of the fan 17 is a constant direction, and the blowing direction can be reversed. For example, in a state where hydraulic pressure is not applied from the hydraulic piping 20, each louver 19 is set to the 1 st inclination angle, and the air is directed in the 1 st direction DW1 in accordance with the rotation of the fan 17. On the other hand, when the hydraulic pressure is applied from the hydraulic pipe 20, each louver 19 is set to the 2 nd inclination angle, and the air is directed to the 2 nd direction DW2 opposite to the 1 st direction DW1 in accordance with the rotation of the fan 17. The 2 nd direction DW2 is a direction in which air is directed from the engine 11 toward the cooling unit 70 side.

Since the fan 17 described above switches the air blowing direction to the 1 st direction DW1 and the 2 nd direction DW2 by changing the inclination angle of each louver 19, the air blowing amount can be sufficiently ensured in both the 1 st direction DW1 and the 2 nd direction DW2 as compared with the method of reversing the rotation direction of the fan 17. Further, since the fan 17 can directly connect the rotation shaft 17X to the engine 11, it can be easily installed in a narrow place such as the engine room 34.

The hydraulic pipe 20 is connected to a hydraulic passage 21 provided in the upper revolving unit 3, and is connected to a solenoid valve 22 in the upper revolving unit 3, whereby hydraulic pressure can be supplied. The hydraulic pressure supply to the fan 17 is performed by switching the solenoid valve 22. The accumulator 23 and the hydraulic pump 14 are provided in this order on the primary side (the hydraulic pressure supply side) of the solenoid valve 22 in the hydraulic pressure path 21. Further, on the secondary side (hydraulic pressure discharge side) of the solenoid valve 22 in the hydraulic pressure path 21, the solenoid valve 22 is connected to the hydraulic oil tank 35.

On the other hand, the cooling unit 70 provided in the engine room 34 is configured to be capable of cooling the inside of the engine room 34 (the engine 11 and other devices) in cooperation with the fan 17. For example, cooling unit 70 is provided so as to face a vent (not shown) provided in the left side surface of upper revolving unit 3 on the left side (negative Y direction side) of engine 11.

The cooling unit 70 includes a shroud 71, a radiator 72, an air-conditioning condenser 78, a fuel cooler 79, and the like. The air conditioning condenser 78 and the fuel cooler 79 are mounted on the negative Y direction side (upstream side of the 1 st direction DW 1) of the radiator 72.

Fig. 3 is an enlarged side sectional view showing the upper portions of the fan 17 and the cooling unit 70. As shown in fig. 3, the heat sink 72 has a core 73 through which air passes and a frame 74 supporting the periphery of the core 73. The core 73 is a rectangular thick plate-like heat exchanger, and for example, 1 or more refrigerant pipes are arranged in a predetermined layout, and heat exchange is performed between the refrigerant circulating in the refrigerant circuit and the air passing around the refrigerant pipes. The core 73 may be provided with a dust filter (not shown) for preventing dust from entering the core surface in the Y negative direction. The frame 74 is fixed to the revolving frame 31 of the upper revolving unit 3, and supports the core 73 in a standing posture facing the fan 17.

The shroud 71 includes a1 st shroud 711 provided on the Y negative direction side (upstream side of the 1 st direction DW 1) of the heat sink 72 and a2 nd shroud 712 provided on the Y positive direction side (downstream side of the 1 st direction DW 1) of the heat sink 72. The 1 st and 2 nd shields 711 and 712 are fixed to the frame 74 of the heat sink 72, and sandwich the heat sink 72 in the Y direction (air flow direction).

The 1 st shroud 711 accommodates the air conditioning condenser 78 and the fuel cooler 79. A louver (not shown) or the like through which air can pass is provided on the Y negative side surface of the 1 st shroud 711.

The 2 nd shroud 712 circumferentially surrounds the space between the radiator 72 and the fan 17. The 2 nd shroud 712 is formed in a crank-like shape in a side sectional view. The 2 nd shroud 712 includes a 1 st plate portion 712a fixed to the frame 74, a 2 nd plate portion 712b extending in the Y negative direction from the 1 st plate portion 712a, and a 3 rd plate portion 712c protruding toward the fan 17 at an end (a position overlapping each louver 19) of the 2 nd plate portion 712b in the Y negative direction. The 2 nd plate portion 712b has a square tubular shape surrounding the periphery of the fan 17. The cooling unit 70 can blow air between the fan 17 and the radiator 72 by using the 2 nd shroud 712 without leaking air from the space to the outside. The shroud 71 may further include a mesh-shaped cover 713 partially covering the Y positive direction side of the fan 17 in the 2 nd shroud 712.

The hydraulic pipe 20 connected to the fan 17 is connected to the boss portion 18 of the fan 17 through the shroud 71 (the 2 nd shroud 712) of the cooling unit 70. In cooling unit 70, hydraulic pipe 20 extends in the space between fan 17 and radiator 72. That is, hydraulic piping 20 is located on the negative Y direction side of fan 17 and on the positive Y direction side of radiator 72.

The hydraulic pipe 20 is inserted through a2 nd plate portion 712b of the upper surface of the 2 nd shroud 712, and extends from the upper surface toward the boss portion 18 below. A connector 18c protruding obliquely upward in the vertical direction and in the negative Y direction is provided in advance in the boss portion 18, and one end of the hydraulic pipe 20 is connected to the connector 18 c. Connector 18c has rigidity (hardness) capable of maintaining its posture in the connected state of hydraulic pipe 20.

On the other hand, hydraulic piping 20 is formed of a flexible resin hose. Since the hydraulic piping 20 has flexibility, connection of the hydraulic piping 20 and the connector 18c of the fan 17, operation of the hydraulic piping 20 between the fan 17 and the radiator 72, and the like can be easily performed at the time of assembly.

The 2 nd plate portion 712b of the 2 nd shield 712 is provided with an opening portion of a long shape, not shown, in advance. A fixing portion 81 for supporting a guide member 80 of the hydraulic pipe 20 is attached so as to close the opening.

The hydraulic pipe 20 is exposed to the outside of the 2 nd shroud 712, and extends in a length shorter than the length inside the shroud 71. This shortens the total length of hydraulic pipe 20, and facilitates assembly of hydraulic pipe 20 and guide member 80 with respect to cooling unit 70. The other end of the hydraulic pipe 20 is connected to a hydraulic passage 21 above a2 nd shroud 712 via a connector 20c (see fig. 4). For example, the piping constituting the hydraulic passage 21 is made of a harder material than the hydraulic piping 20.

Since the hydraulic piping 20 has flexibility, it swings when air flowing through the shroud 71 contacts. If hydraulic pipe 20 interferes with fan 17 or radiator 72 with the swing of hydraulic pipe 20, breakage may occur in fan 17, radiator 72, or hydraulic pipe 20. Therefore, the shovel 100 according to the present embodiment includes the guide member 80 for guiding the hydraulic pipe 20 in the shroud 71.

Next, a guide member 80 according to the present embodiment will be described with reference to fig. 4. Fig. 4 is a perspective view showing hydraulic pipe 20 and guide member 80. In fig. 4, the cover 71 is omitted for the sake of easy understanding of the structure of the guide member 80.

The guide member 80 guides the hydraulic pipe 20 so as not to contact the fan 17 and the radiator 72 in the shroud 71 regardless of the blowing direction of the cooling air. The guide member 80 is fixed to the upper surface of the 2 nd plate portion 712b of the shroud 71 (2 nd shroud 712).

Specifically, the guide member 80 includes: a fixing portion 81 fixed to the cover 71; an external support portion 82 protruding upward from the upper surface of the fixing portion 81; and an inner support portion 83 protruding downward from the lower surface of the fixing portion 81. The fixing portion 81, the outer support portion 82, and the inner support portion 83 are each formed in a plate shape, and are connected to each other by a suitable fixing method such as welding, adhesion, screw fastening, or the like. The fixing portion 81, the outer support portion 82, and the inner support portion 83 are not limited to a plate shape, and may take various shapes (bar shape, block shape, etc.).

The fixing portion 81 is formed in a flat rectangular shape long in the X direction in plan view. The both ends of the fixing portion 81 in the longitudinal direction are fixed to the upper surface of the 2 nd plate portion 712b of the 2 nd shield 712 by fastening with bolts 811.

The fixing portion 81 has a hole 81h at a substantially central portion in the longitudinal direction. An elastic member 75 is attached to the hydraulic pipe 20 and the edge of the hole 81h of the fixing portion 81. The elastic member 75 is formed in an annular shape surrounding the edge of the hole portion 81h, and has a thickness thicker than the plate thickness of the fixing portion 81. The elastic member 75 is attached so as to vertically cross the fixing portion 81, and the hydraulic pipe 20 is inserted inside the elastic member. The hydraulic pipe 20 connects the inside and the outside of the 2 nd shroud 712 through the hole of the annular elastic member 75.

A support member 77 may be connected to the fixing portion 81, and the support member 77 may support a hose 76 (refrigerant circuit) for circulating the refrigerant to the radiator 72. For example, the support member 77 has: a plate 771 welded to the fixing portion 81; a bracket 772 protruding from the upper surface of the plate 771 to hold the hose 76 at a predetermined height position; and a plurality of bolts 773, a fastening plate 771 and a bracket 772. The hose 76 extends in the Y direction, is connected to a connector 76c supported by the bracket 772 via a fixing fitting 76d, and is inserted into the radiator 72 on the negative Y direction side.

The outer support portion 82 is connected to the upper surface of the fixing portion 81 on the X positive direction side, in which the hydraulic pipe 20 extends, outside the shroud 71. The outer support portion 82 has an upper inclined portion 821 protruding upward in the vertical direction and inclined from a bending point of a predetermined height. The upper inclined portion 821 is inclined toward the positive X direction side in the vertical direction.

A hydraulic pipe 20 is disposed on the upper surface of the upper inclined portion 821, and a holder 822 for fixing the hydraulic pipe 20 is provided. The holder 822 is fixed to the plate-shaped upper inclined portion 821 by tightening the bolt 823. That is, the hydraulic pipe 20 is held obliquely above the fixing portion 81 by the external support portion 82. This can prevent the hydraulic pipe 20 from being in an unreasonable posture such as bending.

The inner support portion 83 is connected to the lower surface of the fixing portion 81 on the Y positive direction side of the hole portion 81h of the fixing portion 81. The internal support portion 83 has: a support plate 831 fixed to the adjacent position of the hole 81 h; and a holding portion 832 provided at an extending end portion of the support plate 831 and holding the hydraulic piping 20.

The support plate 831 is capable of being brought into contact with the hydraulic pipe 20, and includes a lower inclined portion 831a, and the lower inclined portion 831a is inclined toward the negative Y side in the vertical direction after protruding from the fixing portion 81 to the lower side in the vertical direction (see also fig. 3). The Y negative direction side of the lower inclined portion 831a inclined with respect to the connection portion of the support plate 831 is a direction away from the fan 17.

The holding portion 832 has a function of restricting and holding the swing range of the hydraulic piping 20. The holding portion 832 is formed in an annular shape (annular body) having a holding hole 832h with an inner diameter larger than an outer diameter of the hydraulic pipe 20. That is, the hydraulic pipe 20 disposed so as to be inserted through the holding hole 832h can slightly swing through the gap between the hydraulic pipe 20 and the annular holding portion 832, and the swing range thereof is limited.

The hydraulic pipe 20 held by the holding portion 832 extends along the lower inclined portion 831a of the support plate 831. In other words, the hydraulic pipe 20 is guided by the internal support portion 83 so as to face the lower side in the vertical direction and the negative side in the Y direction in the hood 71. Thus, guide member 80 can reliably prevent hydraulic pipe 20 from contacting (interfering with) fan 17.

The inner support portion 83 has a bent portion 833 that bends an extension end portion (lowermost end) of the support plate 831 into an R shape. The hydraulic pipe 20 held by the holding portion 832 is in contact with the bent portion 833. As a result, the guide member 80 can stably support the hydraulic pipe 20 without damaging the hydraulic pipe 20 by coming into contact with the edge of the support plate 831.

When the fan 17, the hydraulic pipe 20, and the cooling unit 70 are assembled to the shovel 100, first, one end of the hydraulic pipe 20 is connected to the boss portion 18 of the fan 17. The operator sets the fan 17 and the radiator 72 to which the hydraulic piping 20 is connected, in the upper revolving unit 3.

Thereafter, the worker attaches the hood 71 to the radiator 72 while operating the hydraulic pipe 20 upward. Before the attachment of the hood 71, the guide member 80 is fixed to the 2 nd plate portion 712b of the 2 nd hood 712, and the elastic member 75 is attached to the 2 nd plate portion 712b and the fixing portion 81.

When the worker attaches the hood 71, the worker inserts the hydraulic pipe 20 through the hole of the elastic member 75 and the holding portion 832 of the guide member 80, and exposes the hydraulic pipe 20 to the outside of the 2 nd hood 712. Next, the worker fixes the exposed hydraulic pipe 20 to the external support portion 82, and further connects the other end of the hydraulic pipe 20 to the solenoid valve 22 (or the connector of the hydraulic passage 21). Thereby, the fan 17, the hydraulic pipe 20, and the cooling unit 70 can be assembled in such a manner that the hydraulic pipe 20 is supported by the guide member 80 inside the cooling unit 70.

The excavator 100 according to the present embodiment is basically configured as described above, and the operational effects thereof will be described below with reference to fig. 5 (a) and 5 (B). Fig. 5 (a) is a side cross-sectional view showing a state of the hydraulic pipe 20 when the blowing direction of air is the 1 st direction DW 1. Fig. 5 (B) is a side cross-sectional view showing a state of the hydraulic pipe 20 when the blowing direction of the air is the 2 nd direction DW 2.

When the engine 11 or the like is normally cooled, the excavator 100 rotates the fan 17 by setting each louver 19 to the 1 st inclination angle, and blows air in the 1 st direction DW1 (Y positive direction) as shown in fig. 5 a. The air taken in from the outside of the upper revolving unit 3 moves toward the radiator 72 with the rotation of the fan 17, and is cooled by the radiator 72, thereby becoming cooling air. After the cooling air passes through the inside of the 2 nd shroud 712 and the fan 17, the engine 11 is cooled toward the engine 11.

When cooling air (air) in the 1 st direction DW1 is blown, the extending direction of the hydraulic pipe 20 disposed in the shroud 71 is guided by the guide member 80. That is, the hydraulic pipe 20 is supported so as to be inclined to the lower side in the vertical direction and to the negative Y direction at a position where the hydraulic pipe enters the hood 71 from the upper portion of the hood 71. Thus, even if the air blown in the 1 st direction DW1 contacts the hydraulic pipe 20, contact between the hydraulic pipe 20 and the fan 17 can be avoided.

For example, when air is circulated in the 1 st direction DW1, each louver 19 is inclined at a position closer to the hydraulic piping 20 than the frame 19F of the fan 17 surrounding each louver 19. Then, by circulating air in the 1 st direction DW1, the distance D1 between the hydraulic pipe 20 and the radiator 72 is increased. However, the upper portion of hydraulic pipe 20 is supported by guide member 80, and the lower portion of hydraulic pipe 20 is supported by connector 18 c. Thus, the shovel 100 can maintain the distance D2 between the hydraulic pipe 20 and the frame 19F, the distance D3 between the hydraulic pipe 20 and each louver, and the distance D4 between the hydraulic pipe 20 and the frame 19F in the vicinity of the connection point with the connector 18c satisfactorily (in a state greater than zero).

Then, the shovel 100 blows air in the 2 nd direction DW2 for the purpose of removing dust and the like accumulated in the radiator 72 or the dust filter at the time of maintenance. For example, the shovel 100 has a switch for reversing the air flow from the fan 17 in the cabin 10, and hydraulic pressure is applied to the fan 17 from the hydraulic pipe 20 by operating the switch by an operator. Thus, each louver 19 becomes the 2 nd inclination angle.

Then, by rotating the fan 17, the shovel 100 moves the air in the 2 nd direction DW2 (negative Y direction) as shown in fig. 5B. That is, with the rotation of the fan 17, the air on the engine 11 side is blown to the fan 17, the inside of the 2 nd shroud 712, and the radiator 72 in this order. The air is blown to the heat sink 72 or the dust-proof filter, thereby discharging dust attached to them to the outside.

When blowing the air in the 2 nd direction DW2, the extending direction of the hydraulic pipe 20 disposed in the shroud 71 is also guided by the guide member 80. Due to the influence of the air in the 2 nd direction DW2, the hydraulic pipe 20 may move in the 2 nd direction. However, the hydraulic pipe 20 is held by the holding portion 832 while restricting the swing range, and therefore does not swing significantly. Therefore, even if the hydraulic pipe 20 is affected by the air in the 2 nd direction, the guide member 80 does not contact the radiator 72, and the extended state thereof can be maintained satisfactorily.

For example, when air is circulated in the 2 nd direction DW2, each louver 19 moves to a position farther from the hydraulic piping 20 than in the 1 st direction DW 1. By flowing air in the 2 nd direction DW2, the distance D1 between the hydraulic pipe 20 and the radiator 72 is smaller than the distance D2 between the hydraulic pipe 20 and the frame 19F and the distance D3 between the hydraulic pipe 20 and each louver, for example. However, since the upper portion of hydraulic pipe 20 is held by holding portion 832 of guide member 80, hydraulic pipe 20 can maintain a good (in a state greater than zero) distance D1 from radiator 72. The distance D4 between the hydraulic pipe 20 and the frame 19F in the vicinity of the connection point with the connector 18c can be maintained by supporting the hydraulic pipe 20 by the connector 18 c.

As described above, by providing the guide member 80, the shovel 100 can easily dispose the hydraulic pipe 20 between the fan 17 and the cooling unit 70. Then, the fan 17 of the shovel 100 selectively blows air in the 1 st direction DW1 and the 2 nd direction DW2, and thereby applies a force in the 1 st direction DW1 and the 2 nd direction DW2 to the hydraulic pipe 20. Even if the forces in the two directions are received, the guide member 80 can satisfactorily prevent the hydraulic pipe 20 from coming into contact (interfering) with the fan 17 or the radiator 72.

Further, by fixing the guide member 80 to the upper surface of the cover 71, the hydraulic pipe 20 can be easily assembled to the upper surface of the cover 71. Further, by providing the holding portion 832, the guide member 80 can hold the hydraulic pipe 20 while ensuring proper degree of freedom and assemblability of the hydraulic pipe 20.

The shovel 100 according to the present utility model is not limited to the above embodiment, and various modifications can be adopted. For example, in the above embodiment, the hydraulic pipe 20 is inserted from the upper surface of the cover 71, but the present utility model is not limited to this, and the hydraulic pipe 20 may be inserted from the side surface or the lower surface of the cover 71. In this case, the same effects as those described above can be obtained by applying the guide member 80.

The shovel 100 according to the embodiment of the present disclosure is illustrative in all respects and not restrictive. The embodiments can be modified and improved in various forms without departing from the scope of the appended claims and their gist. The matters described in the above embodiments can be combined in a non-contradictory range by adopting other configurations.

Claims (11)

1. An excavator, which is characterized in that,

The device comprises:

A lower traveling body;

an upper revolving structure provided rotatably with respect to the lower traveling structure;

A fan provided in the upper revolving unit, the fan being capable of controlling the air blowing direction based on hydraulic pressure;

a hydraulic pipe connected to the fan and capable of supplying hydraulic pressure;

A cooling unit configured to exchange heat with the air and cool the structure inside the upper revolving structure with the air blown; and

And a guide member provided in the cooling unit and guiding the hydraulic pipe.

2. The excavator of claim 1, wherein,

The cooling unit comprises a shield which is arranged on the inner side of the cooling unit,

The guide member is fixed to the shroud, and guides the hydraulic pipe inside the shroud.

3. The excavator of claim 2, wherein,

The guide member is fixed to an upper surface of the shield.

4. The excavator of claim 1, wherein,

The hydraulic piping has flexibility.

5. The excavator according to any one of claims 1 to 4, wherein,

The guide member guides the hydraulic pipe so as not to contact the fan regardless of the blowing direction of the air.

6. The excavator of claim 5, wherein,

The cooling unit has a radiator that exchanges heat with the air,

The hydraulic piping is disposed between the fan and the radiator.

7. The excavator of claim 6, wherein,

The guide member guides the hydraulic pipe so as not to contact the radiator regardless of the blowing direction of the air.

8. The excavator according to any one of claims 1 to 4, wherein,

The guide member includes a holding portion that restricts and holds a swing range of the hydraulic pipe.

9. The excavator of claim 8, wherein,

The holding portion is formed as an annular body having an inner diameter larger than an outer diameter of the hydraulic pipe.

10. The excavator according to any one of claims 1 to 4, wherein,

The guide member includes a support plate that is inclined in a direction away from the fan and is contactable with the hydraulic pipe.

11. The excavator of claim 10, wherein,

The guide member has a bending portion formed by bending an end portion of the support plate.