JP2006082661A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve work efficiency for covering a heat exchanging device with a building cover. <P>SOLUTION: The heat exchanging device cover 25 is directly mounted to a support frame body 13 of the heat exchanging device 12 built on a turning frame 5. As this composition makes it unnecessary to provide a cover-mounting framework for mounting the heat exchanging device cover 25 around the heat exchanging device 12, the mounting structure of the heat exchanging device cover 25 can be simplified and the number of components can be reduced. As the heat exchanging device 12 and the heat exchanging device cover 25 can be made into a unit, the workability for mounting/removing the heat exchanging device cover 25 to/from the heat exchanging device 12 can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a construction machine such as a hydraulic excavator or a hydraulic crane, and more particularly to a construction machine in which a heat exchange device is accommodated in a building cover.

  Generally, a hydraulic excavator as a construction machine is roughly constituted by a lower traveling body that can be self-propelled and an upper revolving body that is turnably mounted on the lower traveling body, and on the front side of the upper revolving body, A working device for excavation work is provided so as to be able to move up and down.

  The upper swing body that constitutes the body of the hydraulic excavator together with the lower traveling body has a swing frame that forms a strong support structure, on which the cab, engine, and heat exchange that define the cab are formed. Devices such as devices, building covers for accommodating these devices, and the like are provided. Further, a counterweight that balances the weight with the work device is provided on the rear end side of the revolving frame.

  Here, the above-described building cover is usually attached to a cover mounting frame assembled on a revolving frame, and the cover mounting frame includes a plurality of support columns standing on the revolving frame and each of these support columns. It has a frame structure consisting of a plurality of transverse beams that connect them. And it has composition which covers equipments, such as an engine and a heat exchanging device, with the building cover attached to the framework for cover attachment.

  On the other hand, the heat exchange device accommodated in the building cover is generally composed of a support frame body standing on the revolving frame and a heat exchanger supported by the support frame body. As this heat exchanger, There are a radiator for cooling engine cooling water, an oil cooler for cooling hydraulic oil supplied to a hydraulic actuator, a condenser for an air conditioner that harmonizes air in the cab, and the like. The heat exchange device cools the heat of the heated fluid (engine cooling water, hydraulic oil, refrigerant, etc.) flowing through the heat exchanger by the cooling air introduced into the building cover.

  Here, as a construction machine provided with a building cover according to the prior art, one that uses a support frame constituting a heat exchange device as a part of a cover mounting framework has been proposed. According to this prior art, by using the support frame of the heat exchange device as a part of the cover mounting framework, the number of columns constituting the cover mounting framework is reduced. The workability at the time of assembling can be improved (for example, refer patent document 1).

JP 2004-58796 A

  However, the construction machine according to the above-described prior art only substitutes a part of the plurality of columns constituting the cover mounting framework with the support frame of the heat exchange device, and uses the cover mounting framework. There is no change in the basic structure of installing the building cover.

  As described above, the structure for mounting the building cover using the cover mounting framework is complicated, and the workability when the heat exchange device or the like is covered with the building cover is reduced, and the manufacturing cost of the entire hydraulic excavator increases. There is a problem.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a construction machine capable of improving workability when a heat exchange device provided on a vehicle body frame is covered with a building cover. And

  In order to solve the above-described problems, the present invention provides a vehicle body frame that constitutes a vehicle body, a building cover that is provided on the vehicle body frame and accommodates equipment including an engine therein, and a vehicle body frame that is located within the building cover. It is applied to a construction machine provided with a heat exchange device provided in

  The feature of the configuration adopted by the invention of claim 1 is that the heat exchange device includes a support frame attached to the vehicle body frame, and a heat exchanger that exchanges heat between the fluid supported and heated by the support frame. And a part of the building cover is attached to the support frame.

  According to the second aspect of the present invention, a cover mounting bracket is detachably attached to the support frame of the heat exchange device, and a part of the building cover is attached to the support frame via the bracket.

  The invention of claim 3 is that a part of the building cover is directly attached to the support frame of the heat exchange device.

  The invention of claim 4 is that a plurality of heat exchange devices are provided on the body frame, and a part of the building cover is attached to the support frame of each of the heat exchange devices.

  In the invention of claim 5, the building cover is constituted by an engine cover that covers the engine and a heat exchange device cover that covers the heat exchange device, and the heat exchange device cover is attached to a support frame of the heat exchange device. It is in.

  According to invention of Claim 1, since it was set as the structure which attaches a part of building cover to the support frame body which comprises a heat exchange apparatus, the framework for cover attachment for attaching a building cover to the circumference | surroundings of a heat exchange apparatus There is no need to provide it. Thereby, the mounting structure of the building cover can be simplified, the number of parts can be reduced, and workability when the heat exchange device is covered with the building cover can be improved.

  According to the second aspect of the present invention, a part of the building cover is attached to the support frame body via the bracket that is detachably attached to the support frame body of the heat exchange device. Even when the height dimension of the frame changes, a part of the building cover can be securely attached to the support frame via the bracket by attaching the bracket to the support frame.

  According to the invention of claim 3, the number of parts can be significantly reduced by directly attaching a part of the building cover to the support frame of the heat exchange device.

  According to the invention of claim 4, even when a plurality of heat exchange devices are provided on the vehicle body frame, by attaching a part of the building cover to the support frame body of each of these heat exchange devices, the building cover mounting structure is provided. It can be simplified, and the number of parts can be reduced.

  According to the invention of claim 5, since the heat exchange device cover constituting a part of the building cover can be attached to the support frame of the heat exchange device without using the cover mounting framework, the heat exchange device cover The mounting structure can be simplified and the number of parts can be reduced. Moreover, since the heat exchange device and the heat exchange device cover can be unitized, workability when the heat exchange device cover is attached to and removed from the heat exchange device can be improved.

  Hereinafter, a case where an embodiment of the construction machine according to the present invention is applied to a hydraulic excavator will be described as an example, and will be described in detail with reference to FIGS. 1 to 10.

  First, FIG. 1 thru | or FIG. 6 shows the 1st Embodiment of this invention, In the figure, 1 has shown the hydraulic shovel used for excavation work, such as earth and sand. Here, the hydraulic excavator 1 includes a crawler-type lower traveling body 2 that can be self-propelled and an upper revolving body 3 that is turnably mounted on the lower traveling body 2. A working device 4 for excavation work is provided on the front side.

  Reference numeral 5 denotes a revolving frame as a vehicle body frame that forms the base of the upper revolving structure 3, and the revolving frame 5 is located at the center of the left and right directions, as shown in FIGS. A center frame 5A that extends, a left and right side frame 5B (only shown on the right side) that is disposed on both the left and right sides of the center frame 5A and that extends in the front and rear directions with a D-shaped cross-sectional shape, and a center frame The beam 5C connecting the 5A and the side frame 5B is roughly configured to form a strong frame structure. A mounting base 5D having a U-shaped cross-sectional shape and extending in the front and rear directions is disposed on the beam 5C, and a heat exchange device 12 to be described later is mounted on the mounting base 5D. Yes.

  The working device 4 is attached to the front side of the revolving frame 5 so as to be able to move up and down, and the counterweight 6 is attached to the rear end side of the revolving frame 5 to balance the weight with the working device 4. .

  7 is a cab located on the left side of the front part of the upper swing body 3 and provided on the swing frame 5. The cab 7 defines a driver's cab, in which a driver's seat on which an operator is seated, an operating lever Etc. (both not shown).

  A hydraulic oil tank 8 is provided on the left end side of the revolving frame 5 and is located on the rear side of the cab 7. The hydraulic oil tank 8 stores hydraulic oil supplied to a hydraulic actuator mounted on the excavator 1. To do. A fuel tank 9 is provided on the right end side of the revolving frame 5, and the fuel tank 9 stores fuel supplied to the engine 10 described later.

  Reference numeral 10 denotes an engine located on the front side of the counterweight 6 and provided on the rear side of the swivel frame 5. The engine 10 is arranged in a horizontally placed state extending leftward and rightward as shown in FIG. Has been. A hydraulic pump 11 is attached to the left side of the engine 10, and the hydraulic pump 11 is driven by the engine 10, so that the hydraulic oil in the hydraulic oil tank 9 is supplied to each hydraulic actuator mounted on the hydraulic excavator 1. It is to be pumped towards.

  Reference numeral 12 denotes a heat exchange device provided on the right side of the engine 10, and the heat exchange device 12 includes a support frame 13, which will be described later, a radiator 15, an oil cooler 16, and an intercooler, which will be described later. 17, a heat exchanger composed of an air conditioner capacitor 18 and a fuel cooler 19 is more generally configured.

  Reference numeral 13 denotes a support frame that forms the outer shell of the heat exchange device 12, and the support frame 13 is erected on the mounting base 5 </ b> D of the revolving frame 5 using bolts 14 as shown in FIGS. 5 and 6. The upper end side is formed in a rectangular frame shape. Here, the support frame 13 connects the front vertical frame 13A and the rear vertical frame 13B extending in the upward and downward directions while facing the front and rear directions, and the front and rear vertical frames 13A and 13B. , A plurality of horizontal frames 13C extending in the rear direction form a strong support structure.

  Further, between the upper end portions of the front vertical frame 13A and the rear vertical frame 13B, a flat screw seat 13D extending in the front and rear directions is integrally provided, and a bracket 21 described later is attached to the screw seat 13D. It has become. The front vertical frame 13A is integrally provided with a screw seat 13E extending upward and downward, and the rear vertical frame 13B is integrally provided with a screw seat 13F extending upward and downward. The screw seats 13E, 13F has a configuration in which a right cover 25B of a heat exchange device cover 25 described later is attached.

  Reference numeral 15 denotes a radiator disposed in the support frame 13, and the radiator 15 constitutes a heat exchanger supported by the support frame 13 together with an oil cooler 16, an intercooler 17, a condenser 18 and a fuel cooler 19 which will be described later. Is. And the radiator 15 has a heat radiating part through which the cooling water of the engine 10 circulates, and the cooling air from the cooling fan 20 described later passes through the heat radiating part to dissipate the heat of the engine cooling water into the cooling air. The engine cooling water is cooled.

  16 is an oil cooler disposed in the support frame 13 adjacent to the radiator 15, and the oil cooler 16 has a heat radiating portion through which return oil from each hydraulic actuator mounted on the hydraulic excavator 1 flows. The operating oil returning into the operating oil tank 8 is cooled by dissipating the heat of the returning oil from the hydraulic actuator into the cooling air.

  An intercooler 17 is attached to the support frame 13 so as to face the radiator 15 and the like in the left and right directions. The intercooler 17 cools the heat of the air sucked by the turbocharger (not shown). The intake air is cooled by dissipating heat.

  A condenser 18 is located below the intercooler 17 and is attached to the support frame 13. The condenser 18 cools a refrigerant of an air conditioner (not shown) that harmonizes the air in the cab 7. is there. Reference numeral 19 denotes a fuel cooler attached to the support frame 13 adjacent to the capacitor 18, and the fuel cooler 19 cools the fuel stored in the fuel tank 9.

  Reference numeral 20 denotes a cooling fan attached to the support frame 13 so as to face the radiator 15 and the oil cooler 16, and the cooling fan 20 is driven to rotate by a hydraulic motor 20 </ b> A so that outside air is discharged into a building cover 23 described later. The air is sucked and supplied to the radiator 15, oil cooler 16, intercooler 17, condenser 18, and fuel cooler 19 as cooling air.

  Reference numeral 21 denotes a cover mounting bracket that is detachably attached to the support frame 13 of the heat exchange device 12, and the bracket 21 has a U-shaped cross-sectional shape by bending a steel plate or the like. It is formed in a frame shape extending in the rear direction, and is attached to a screw seat 13 </ b> D provided on the upper end side of the support frame body 13 using a plurality of bolts 22. A flat screw seat 21 </ b> A for attaching an upper cover 25 </ b> A of the heat exchange device cover 25 described later is provided on the upper end side of the bracket 21.

  23 is a building cover provided on the revolving frame 5 in front of the counterweight 6, and the building cover 23 includes an engine 10 and a hydraulic pump 11 mounted on the revolving frame 5, as shown in FIG. Each device such as the heat exchange device 12 is accommodated. Here, the building cover 23 is roughly constituted by an engine cover 24 that covers the engine 10, the hydraulic pump 11, and the like, and a heat exchange device cover 25 described later.

  In this case, the engine cover 24 is attached to, for example, a cover attachment frame (not shown) assembled on the revolving frame 5, and the heat exchange device cover 25 is bracketed to the support frame 13 constituting the heat exchange device 12. It is the structure which can be attached via 21.

  A heat exchange device cover 25 covers the heat exchange device 12, and the heat exchange device cover 25 is disposed adjacent to the right side of the engine cover 24. Here, as shown in FIGS. 5 and 6, the heat exchange device cover 25 is formed separately from the upper cover 25 </ b> A that covers the heat exchange device 12 from above and the upper cover 25 </ b> A. And a right side cover 25B covering from the side. The right cover 25B is formed with a lattice-shaped vent 25C over substantially the entire surface thereof, so that outside air can be sucked into the building cover 23 through the vent 25C.

  Here, the upper cover 25 </ b> A is detachably attached to the screw seat 21 </ b> A of the bracket 21 attached to the support frame 13 of the heat exchange device 12 using bolts 26. As shown in FIGS. 3 and 6, the upper surface of the upper cover 25 </ b> A forms substantially the same plane as the upper surface of the engine cover 24.

  On the other hand, the right cover 25 </ b> B is detachably attached to the screw seats 13 </ b> E and 13 </ b> F provided on the support frame 13 of the heat exchange device 12 using bolts 27. When the cooling fan 20 rotates, outside air is sucked into the building cover 23 through the vent hole 25C of the right cover 25B, and this cooling air is supplied to the fuel cooler 19, the condenser 18, the intercooler 17, the oil cooler 16, and the radiator 15. It is the composition which becomes.

  In this way, the upper cover 25A and the right cover 25B that constitute the heat exchange device cover 25 are directly attached to the support frame 13 of the heat exchange device 12, respectively. As a result, the frame for attaching the cover for attaching the heat exchange device cover 25 can be made unnecessary, and accordingly, the attachment structure of the entire building cover 23 can be simplified.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 self-travels to the excavation site by, for example, the lower traveling body 2 and then rotates the upper swing body 3 while turning the working device 4. Use it to excavate earth and sand.

  When the hydraulic excavator 1 is operated, the cooling fan 20 is rotationally driven, so that outside air is sucked into the building cover 23 through the vent 25C of the heat exchanger cover 25, and this outside air becomes heat as cooling air. The fuel is supplied to the fuel cooler 19, condenser 18, intercooler 17, oil cooler 16, and radiator 15 of the exchange device 12.

  Here, in the present embodiment, the heat exchange device cover 25 that constitutes the building cover 23 together with the engine cover 24 is directly attached to the support frame 13 of the heat exchange device 12. The operation of attaching the device cover 25 will be described.

  First, as shown in FIG. 5, the heat exchange device 12 is fixed on the mounting base 5 </ b> D of the revolving frame 5 using the bolts 14. And the bracket 21 is attached to the screw seat 13D of the support frame 13 which comprises this heat exchange apparatus 12 using the volt | bolt 22. FIG.

  Next, a bolt 26 is inserted into the upper cover 25 </ b> A constituting the heat exchange device cover 25, and this bolt 26 is screwed to the screw seat 21 </ b> A of the bracket 21. Further, a bolt 27 is inserted into the right cover 25B, and this bolt 27 is screwed to each screw seat 13E, 13F provided on the support frame 13 of the heat exchange device 12.

  In this manner, the upper cover 25A of the heat exchange device cover 25 covers the heat exchange device 12 from above by being attached to the support frame 13 via the bracket 21, and the right cover 25B is directly attached to the support frame 13. As a result, the heat exchange device 12 can be covered from the right side (see FIGS. 4 and 6).

  Thus, according to the present embodiment, the heat exchange device cover 25 is attached to the support frame 13 of the heat exchange device 12 erected on the revolving frame 5. This eliminates the need to provide a cover mounting framework for mounting the heat exchange device cover 25 around the heat exchange device 12, thereby simplifying the mounting structure of the heat exchange device cover 25 and reducing the number of parts. Reduction can be achieved. Moreover, since the heat exchange apparatus 12 and the heat exchange apparatus cover 25 can be unitized, workability | operativity when attaching and removing the heat exchange apparatus cover 25 with respect to the heat exchange apparatus 12 can be improved.

  Further, the bracket 21 is detachably attached to the upper end side of the support frame 13 using bolts 22, and the upper cover 25 </ b> A of the heat exchange device cover 25 is attached to the support frame 13 via the bracket 21. . Accordingly, even when the height dimension of the support frame 13 is changed due to, for example, a change in the model of the heat exchange device 12, the upper cover 25A can be attached to the bracket by appropriately changing the shape of the bracket attached to the support frame 13. It can be reliably attached to the support frame 13 via

  Next, FIG. 7 to FIG. 10 show a second embodiment of the present invention. The feature of this embodiment is that a plurality of heat exchange devices are provided in a vehicle body frame, and a support frame body for each of these heat exchange devices. There is a part of the building cover installed. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 31 is a hydraulic excavator according to the present embodiment, and the hydraulic excavator 31 has a vehicle body constituted by a lower traveling body 2 and an upper swing body 3 in substantially the same manner as the hydraulic excavator 1 according to the first embodiment described above. The working device 4 is configured to be able to move up and down on the front side of the upper swing body 3. However, the hydraulic excavator 31 according to the present embodiment is different from the first embodiment in that two heat exchange devices 39 and 43 are provided on a swing frame 32 described later.

  Reference numeral 32 denotes a turning frame as a vehicle body frame. As shown in FIGS. 9 and 10, the turning frame 32 includes a center frame 32A and left and right side frames 32B having a D-shaped cross section (only the right side is shown). And a beam 32C connecting between the center frame 32A and the side frame 32B. On the beam 32C, a mounting base 32D having a U-shaped cross section and extending in the front and rear directions is disposed. On the mounting base 32D, two heat exchange devices 39 and 43, which will be described later, are disposed in front. , It is configured to be mounted side by side in the rear direction.

  The working device 4 is attached to the front side of the revolving frame 32 so as to be able to move up and down, and a counterweight 33 is attached to the rear end side of the revolving frame 32. Further, a cab 34 that defines a cab is provided on the left side of the front part of the swivel frame 32, a hydraulic oil tank 35 is provided on the left end side of the swivel frame 32, and a fuel tank is provided on the right end side of the swivel frame 32. 36 is provided.

  Reference numeral 37 denotes an engine located on the front side of the counterweight 33 and provided on the rear side of the turning frame 32. As shown in FIG. 8, the engine 37 is disposed in a horizontally placed state extending in the left and right directions. Has been. On the left side of the engine 37, a hydraulic pump 38 that pressure-feeds hydraulic oil in the hydraulic oil tank 35 toward each hydraulic actuator mounted on the hydraulic excavator 31 is attached.

  Reference numeral 39 denotes a rear heat exchange device provided on the right side of the engine 37. As shown in FIG. 9, the heat exchange device 39 is a heat composed of a support frame 40 described later, a radiator 41 described later, and an intercooler 42. It is roughly configured with an exchanger.

  Reference numeral 40 denotes a support frame that forms an outer shell of the heat exchanging device 39. The support frame 40 is erected on the mounting base 32D of the revolving frame 32, and is formed in a rectangular frame shape with an upper end opened. Here, the support frame 40 is connected to the front vertical frame 40A and the rear vertical frame 40B extending in the upward and downward directions while facing the front and rear directions, and the front and rear vertical frames 40A and 40B are connected to each other. , A plurality of horizontal frames 40C extending in the rear direction form a strong support structure.

  Further, flat screw seats 40D extending in the left and right directions are integrally provided on the upper end sides of the front vertical frame 40A and the rear vertical plate 40B, and the screw seat 40D is provided with a heat exchange device cover 50 described later. The upper surface portion 50A is attached. Further, the front vertical plate 40A is integrally provided with a pair of screw seats 40E spaced upward and downward, and the rear vertical plate 40B is integrally provided with a pair of screw seats 40F spaced apart upward and downward. These screw seats 40E and 40F are configured such that a side surface portion 50B of a heat exchange device cover 50 described later is attached.

  Reference numeral 41 denotes a radiator disposed in the support frame 40. The radiator 41, together with an intercooler 42 described later, constitutes a heat exchanger supported by the support frame 40. The radiator 41 cools the engine coolant by dissipating the heat of the coolant of the engine 37 into the cooling air.

  An intercooler 42 is attached to the support frame 40 so as to face the radiator 41 in the left and right directions. The intercooler 42 cools the heat of the air sucked by the turbocharger (not shown) into the cooling air. This intake air is cooled by dissipating heat.

  The support frame 40 of the heat exchanging device 39 is provided with a cooling fan (not shown) facing the radiator 41. By rotating the cooling fan, cooling air is supplied to the radiator 41 and the intercooler 42. It is a configuration to be supplied.

  43 is a front heat exchange device provided on the front side of the heat exchange device 39. As shown in FIG. 10, the heat exchange device 43 includes a support frame 44 described later, an oil cooler 45 described later, a condenser 46, and A heat exchanger composed of a fuel cooler 47 is more generally configured.

  Reference numeral 44 denotes a support frame that forms an outer shell of the heat exchange device 43. The support frame 44 is positioned on the front side of the heat exchange device 39 and is erected on the mounting base 32D of the revolving frame 32, and the upper end side is open. It is formed in a rectangular frame shape. Here, the support frame 44 connects the front vertical frame 44A and the rear vertical frame 44B extending in the upward and downward directions while facing the front and rear directions, and the front and rear vertical frames 40A and 40B. A plurality of horizontal frames 44C extending in the rear direction form a strong support structure.

  A flat screw seat 44D extending in the front and rear directions is integrally provided between the upper ends of the front vertical frame 44A and the rear vertical plate 44B. The screw seat 44D has a heat exchange device cover 53, which will be described later. The upper surface portion 53A is attached. The front vertical plate 44A is integrally provided with a pair of screw seats 44E spaced upward and downward, and the rear vertical plate 44B is integrally provided with a pair of screw seats 44F spaced apart upward and downward. Each of the screw seats 44E and 44F has a configuration in which a side surface portion 53B of a heat exchange device cover 53 described later is attached.

  Reference numeral 45 denotes an oil cooler disposed in the support frame 44, and the oil cooler 45 constitutes a heat exchanger supported by the support frame 44 together with a condenser 46 and a fuel cooler 47 described later. The oil cooler 45 cools the hydraulic oil that returns to the hydraulic oil tank 35 by radiating the heat of the return oil from each hydraulic actuator mounted on the hydraulic excavator 31 into the cooling air.

  A condenser 46 is attached to the support frame 44 so as to face the oil cooler 45 in the left and right directions. The condenser 46 cools the refrigerant of an air conditioner (not shown) that harmonizes the air in the cab 34. To do. A fuel cooler 47 is attached to the support frame 44 adjacent to the condenser 46, and the fuel cooler 47 cools the fuel stored in the fuel tank 36.

  The support frame 44 of the heat exchange device 43 is provided with a cooling fan (not shown) facing the oil cooler 45. By rotating the cooling fan, the oil cooler 45, the condenser 46, the fuel The cooling air is supplied to the cooler 47.

  48 is a building cover provided on the revolving frame 32 in front of the counterweight 33. The building cover 48 includes an engine 37 and a hydraulic pump 38 mounted on the revolving frame 32 as shown in FIG. Each device such as the heat exchange devices 39 and 43 is accommodated. Here, the building cover 48 is roughly constituted by an engine cover 49 that covers the engine 37, the hydraulic pump 38, and the like, and heat exchange device covers 50 and 53 described later.

  In this case, the engine cover 49 is attached to, for example, a cover attachment frame (not shown) assembled on the revolving frame 32, and the heat exchange device cover 50 is attached to the support frame 40 of the heat exchange device 39, The heat exchange device cover 53 is configured to be attached to the support frame body 44 of the heat exchange device 43.

  Reference numeral 50 denotes a rear heat exchange device cover that covers the heat exchange device 39, and the heat exchange device cover 50 is disposed adjacent to the right side of the engine cover 49. Here, as shown in FIG. 9, the heat exchange device cover 50 is integrally formed by an upper surface portion 50A that covers the heat exchange device 39 from above and a side surface portion 50B that covers the heat exchange device 39 from the right side. The side surface portion 50B is formed with a lattice-like vent 50C over substantially the entire surface thereof, so that outside air can be sucked into the building cover 48 through the vent 50C.

  Here, the upper surface portion 50 </ b> A of the heat exchange device cover 50 is detachably attached to the screw seat 40 </ b> D provided on the support frame body 40 of the heat exchange device 39 using bolts 51, and is almost the same as the upper surface of the engine cover 49. A plane is formed.

  On the other hand, the side surface portion 50 </ b> B of the heat exchange device cover 50 is detachably attached to the screw seats 40 </ b> E and 40 </ b> F provided on the support frame body 40 of the heat exchange device 39 using bolts 52. Then, outside air is sucked into the building cover 48 through the vent 50C of the side surface portion 50B, and this outside air is supplied as cooling air to the intercooler 42 and the radiator 41.

  Reference numeral 53 denotes a front heat exchange device cover that covers the heat exchange device 43. The heat exchange device cover 53 is disposed adjacent to the right side of the engine cover 49 and adjacent to the front side of the heat exchange device cover 50. Here, as shown in FIG. 10, the heat exchange device cover 53 is integrally formed by an upper surface portion 53A that covers the heat exchange device 43 from above and a side surface portion 53B that covers the heat exchange device 43 from the right side. The side wall 53B is formed with a lattice-shaped vent 53C over substantially the entire surface thereof, so that outside air can be sucked into the building cover 48 through the vent 53C.

  Here, the upper surface portion 53A of the heat exchange device cover 53 is detachably attached to the screw seat 44D provided on the support frame body 44 of the heat exchange device 43 using bolts 54, and the upper surface of the engine cover 49 and the heat The upper surface portion 50 </ b> A of the exchange device cover 50 is formed substantially on the same plane.

  On the other hand, the side surface portion 53 </ b> B of the heat exchange device cover 53 is detachably attached to the screw seats 44 </ b> E and 44 </ b> F provided on the support frame body 44 of the heat exchange device 43 using bolts 55. It forms substantially the same plane as the side surface portion 50B. Then, outside air is sucked into the building cover 48 through the vent 53C of the side portion 53B, and this outside air is supplied as cooling air to the fuel cooler 47, the condenser 46, and the oil cooler 45 of the heat exchange device 43. ing.

  The hydraulic excavator 31 according to the present embodiment has the above-described configuration, and two heat exchange devices 39 and 43 are provided on the revolving frame 32, and the heat exchange device cover 50 is provided on the support frame 40 of the heat exchange device 39. And the heat exchange device cover 53 is attached to the support frame 44 of the heat exchange device 43.

  As a result, there is no need to provide a frame for attaching the cover for attaching the heat exchange device covers 50 and 53 around the heat exchange devices 39 and 43, so that the attachment structure of the heat exchange device covers 50 and 53 is simplified. Therefore, the number of parts can be reduced. Moreover, since the heat exchange device 39 and the heat exchange device cover 50 can be unitized, workability when the heat exchange device cover 50 is attached to and removed from the heat exchange device 39 can be improved. Similarly, since the heat exchange device 43 and the heat exchange device cover 53 can be unitized, workability when the heat exchange device cover 53 is attached to and removed from the heat exchange device 43 can be improved.

  In the second embodiment described above, two heat exchange devices 39, 43 are provided on the revolving frame 32, and heat is applied to the support frame bodies 40, 44 constituting the heat exchange devices 39, 43, respectively. The case where the exchange device covers 50 and 53 are attached is illustrated. However, the present invention is not limited to this. For example, three or more heat exchange devices may be provided, and a heat exchange device cover may be attached to the support frame of each of the heat exchange devices.

  Further, in each of the above-described embodiments, a hydraulic excavator is exemplified as a construction machine. However, the present invention is not limited to this, and other construction machines including a heat exchanging device such as a hydraulic crane, a wheel loader, a bulldozer, and the like. It can also be widely applied to.

It is a front view which shows the hydraulic shovel applied to the 1st Embodiment of this invention. 1 is a plan view showing a hydraulic excavator according to a first embodiment. It is a perspective view which shows the upper turning body of the hydraulic shovel which removed the working device. It is a perspective view of the principal part expansion which expands and shows the turning frame, heat exchange apparatus, heat exchange apparatus cover, etc. in FIG. It is a disassembled perspective view which decomposes | disassembles and shows the turning frame in FIG. 4, a heat exchange apparatus, a heat exchange apparatus cover, etc. FIG. It is sectional drawing which looked at the turning frame, the heat exchange apparatus, the heat exchange apparatus cover, etc. from the arrow VI-VI direction in FIG. It is a front view which shows the hydraulic shovel applied to the 2nd Embodiment of this invention. It is a top view which shows the hydraulic excavator by 2nd Embodiment. It is a disassembled perspective view which expands and shows a turning frame, a rear heat exchange device, a rear heat exchange device cover, and the like. It is a disassembled perspective view which expands and shows a revolving frame, a front heat exchange device, a front heat exchange device cover, and the like.

Explanation of symbols

1,31 Excavator 2 Lower traveling body (car body)
3 Upper swing body (car body)
5,32 Swivel frame (body frame)
10, 37 Engine 12, 39, 43 Heat exchange device 13, 40, 44 Support frame 15, 41 Radiator (heat exchanger)
16, 45 Oil cooler (heat exchanger)
17, 42 Intercooler (Heat exchanger)
18,46 condenser (heat exchanger)
19, 47 Fuel cooler (heat exchanger)
21 Bracket 23, 48 Building cover 24, 49 Engine cover 25, 50, 53 Heat exchange device cover

Claims (5)

A vehicle body frame constituting the vehicle body, a building cover provided on the vehicle body frame and containing equipment including an engine therein, and a heat exchange device provided in the vehicle body frame located in the building cover. In the construction machine
The heat exchange device includes a support frame attached to the vehicle body frame, and a heat exchanger that exchanges heat of the fluid supported and heated by the support frame, and the building cover covers the support frame A construction machine characterized in that it is configured to attach a part of it.   The construction machine according to claim 1, wherein a bracket for attaching a cover is detachably attached to a support frame of the heat exchange device, and a part of the building cover is attached to the support frame via the bracket. .   The construction machine according to claim 1, wherein a part of the building cover is directly attached to a support frame of the heat exchange device.   The construction machine according to claim 1, 2 or 3, wherein a plurality of the heat exchange devices are provided on the body frame, and a part of the building cover is attached to a support frame of each of the heat exchange devices.   The said building cover comprises an engine cover that covers the engine and a heat exchange device cover that covers the heat exchange device, and the heat exchange device cover is attached to a support frame of the heat exchange device. , 2, 3 or 4.

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