JP5461085B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator or a wheel loader, and more particularly to a construction machine provided with a heat exchanger such as a radiator or an oil cooler.

  In general, a hydraulic excavator as a construction machine is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front-rear side of the upper revolving body that can be raised and lowered. It is roughly constituted by a working device.

  Further, the upper swing body is a swing frame forming a support structure, a cab provided on the front side of the swing frame, on which an operator gets on, an engine mounted on the rear side of the swing frame and driving a hydraulic pump, A heat exchanger such as a radiator or an oil cooler provided so as to face the cooling fan that is rotationally driven by the engine, and a pair of side plates provided so as to face both sides in the width direction of the heat exchanger. It is configured.

  On the other hand, the revolving frame includes a bottom plate, left and right vertical plates erected on the bottom plate, a plurality of extending beams provided to project outward from the vertical plates to the left and right directions, This is roughly constituted by left and right side frames provided on the protruding end side of the overhanging beam. Of the overhanging beams, for example, two overhanging beams located on the rear side and adjacent in the front and rear directions serve as heat exchanger attachment portions for attaching the side plates supporting the heat exchanger. Yes.

  Here, there is a hydraulic excavator in which a single heat exchanger unit is configured by assembling the heat exchanger and each side plate in advance, and this heat exchanger unit is attached to each overhanging beam of the swivel frame. On the other hand, assembling workability is improved by attaching it as a single component (see, for example, Patent Document 1).

  When the heat exchanger unit is mounted on the swivel frame, the heat exchanger unit is lifted by a crane or the like and moved onto the swivel frame, and the lower portions of the pair of side plates are placed between the corresponding extended beams. It is inserted from the upper side and arranged at a predetermined height position. In this state, the heat exchanger unit is attached to the swivel frame by fastening bolts to the side plates and the overhanging beams from the horizontal direction.

JP 2007-153310 A

  By the way, in the hydraulic excavator according to Patent Document 1 described above, when the heat exchanger unit is mounted on the revolving frame, the lower portions of the pair of side plates must be accurately inserted between the overhanging beams of the revolving frame. Moreover, the bolt holes in the side plates and the bolt holes in each overhang beam must be accurately aligned. For this reason, there is a problem that the heat exchanger unit must be moved accurately in the horizontal and vertical directions, the crane is difficult to operate, and the assembly workability is poor.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to easily and accurately attach a pair of side plates to a vehicle body frame and to assemble a heat exchanger. It is to provide a construction machine that can improve the performance.

  A construction machine according to the present invention includes a vehicle body frame that forms a support structure, and a heat exchanger that is provided on the vehicle body frame and performs heat exchange of a fluid to be cooled.

In order to solve the above-described problem, the invention adopts the feature of the structure of the first aspect in that one of the heat exchanger mounting portions having a flat surface is provided in the vehicle body frame, and the one heat exchanger. A heat exchanger mounting portion having a rising surface rising at a position spaced apart from the mounting portion in the width direction of the heat exchanger, and facing the heat exchanger spaced apart on both sides in the width direction. a pair of side plates, on one of the side plates of the pair of side plates, bent the lower portion in the horizontal direction, on to the flat surface of the heat exchanger mounting portion of the one, in a downward direction A horizontal mounting portion that is fastened in a face-to-face manner is integrally formed. The other side plate of the pair of side plates is further extended at a lower portion thereof , and the rise of the other heat exchanger mounting portion is a configuration you integrally formed vertical mounting portion to be fastened in a state where the plane was facing the horizontal direction It lies in the fact.

According to a second aspect of the present invention, the pair of side plates are positioned on the front side of the heat exchanger and extend leftward and rightward, and the rear side of the heat exchanger so as to face the front side plate. The horizontal mounting portion is provided on the front side plate, and the vertical mounting portion is provided on the rear side plate .

According to the first aspect of the present invention, of the pair of side plates provided in the heat exchanger, the horizontal mounting portion is integrally formed below one side plate, and the vertical mounting portion is integrally formed on the other side plate. Therefore, each side plate can be obtained by having the horizontal mounting portion face the flat surface of one heat exchanger mounting portion from above and the vertical mounting portion face the rising surface of the other heat exchanger mounting portion in the horizontal direction. And each heat exchanger mounting portion can be accurately aligned in the upper, lower and horizontal directions. In this case, since the horizontal mounting portion can move in the horizontal direction on the flat surface of one heat exchanger mounting portion, the vertical mounting portion is brought into contact with the rising surface of the other heat exchanger mounting portion. Also, the horizontal mounting portion and the flat surface of one side plate can be accurately aligned in the lateral direction. In addition, since the horizontal mounting portion can move in the horizontal direction on the flat surface of one heat exchanger mounting portion, even if each side plate is displaced with respect to the heat exchanger mounting portion, this positional shift is easy. Each side plate can be easily fastened to each heat exchanger mounting portion. Thereby, for example, in a fastening operation using a bolt or the like, the corresponding bolt hole can be easily aligned.

  As a result, for example, when a heat exchanger and each side plate are attached to the vehicle body frame using a crane, a skilled operation technique is not required, and each side plate is simply arranged at an accurate position of the vehicle body frame by a simple crane operation. Therefore, the assembly workability of the heat exchanger can be improved.

According to invention of Claim 2, a horizontal attachment part is provided in the front side surface plate located in the front side of a heat exchanger, and the vertical attachment part is provided in the rear side surface plate provided in the rear side of the said heat exchanger . from when attaching the front side plate and the rear side plate to the vehicle body frame, on a horizontal mounting portion with respect to the flat face of one of the heat exchanger mounting part, by opposed from below, vertical mounting which is provided on the rear side plate The part and the rising surface can be accurately aligned in the upward and downward directions. Further, since the horizontal mounting portion can move in the horizontal direction on the flat surface, the horizontal mounting portion and the flat surface of the front side plate are also laterally moved by bringing the vertical mounting portion into contact with the rising surface. Accurate alignment is possible. Thereby, for example, in a fastening operation using a bolt or the like, the corresponding bolt hole can be easily aligned.

The hydraulic excavator according to the implementation of the embodiment of the present invention is a front view showing. It is an expanded sectional view of the upper turning body seen from the direction of arrows II-II in FIG. It is an external appearance perspective view which expands and shows a turning frame. It is an external appearance perspective view of the principal part expansion shown in the state which mounted the heat exchanger unit in the turning frame. It is an external appearance perspective view which expands and shows the heat exchanger unit in FIG. It is an external appearance perspective view which shows a heat exchanger assembly alone. It is a disassembled perspective view which shows the state which attaches the side plate of a heat exchanger unit to each left extension beam of a revolving frame. It is sectional drawing of the principal part expansion which looked at the state which attaches the side plate of a heat exchanger unit to each left extension beam of a revolving frame from the arrow VIII-VIII direction in FIG. It is an external appearance perspective view which shows the state which fastened the side plate of the heat exchanger unit to each left extension beam of a revolving frame. It is sectional drawing of the principal part expansion which looked at the state which fastened the side plate of the heat exchanger unit to each left extension beam of a turning frame from the arrow XX direction in FIG. It is a disassembled perspective view which shows the state which attaches the side plate of a heat exchanger unit to each left extension beam by the 1st reference example of this invention. It is sectional drawing of the principal part expansion which looked at the state which attaches the side plate of a heat exchanger unit to each left extension beam from the arrow XII-XII direction in FIG. It is sectional drawing of the principal part expansion which looked at each left overhang | projection beam and each side plate by the 2nd reference example of this invention from the same position as FIG.

  Hereinafter, as a typical example of a construction machine according to an embodiment of the present invention, a hydraulic excavator provided with a heat exchanger such as a radiator or an oil cooler will be described as an example, and will be described in detail with reference to the accompanying drawings.

  First, FIGS. 1 to 10 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a crawler-type hydraulic excavator as a construction machine. And a work device 4 that is provided on the front side of the upper swing body 3 so as to be able to move up and down and that performs excavation work of earth and sand.

  Reference numeral 5 denotes a turning frame as a vehicle body frame which forms the base of the upper turning body 3. As shown in FIGS. 2 and 3, the swivel frame 5 has a bottom plate 6 made of a thick steel plate extending in the front and rear directions and a left and right direction on the bottom plate 6 with a predetermined interval. A left vertical plate 7, a right vertical plate 8 extending in the rearward direction, a plurality of left extending beams 9 extending leftward from the left vertical plate 7, and extending rightward from the right vertical plate 8 are provided. A plurality of right extending beams 10, a left side frame 11 having a D-shaped cross section fixed to the protruding end side of each left extending beam 9 and extending in the front and rear directions, and a protruding end of each right extending beam 10. A right side frame 12 having a D-shaped cross section that is fixed to the side and extends in the front and rear directions; It is configured as a stronger support structure.

  A working device 4 is attached to the front positions of the left and right vertical plates 8 and 9, and an engine 15 described later is mounted on the rear position. A cab 14 described later is mounted on the cab support portion 13.

  Here, the left overhanging beam 9 is composed of four left overhanging beams 9A to 9D arranged at a desired interval from the front side to the rear side. Of these four left overhanging beams 9A to 9D, for example, the third left overhanging beam 9C from the front side constitutes a front heat exchanger mounting portion to which a front side plate 28 to be described later is mounted (hereinafter referred to as third The left overhanging beam 9C is referred to as “front heat exchanger mounting portion 9C”). As shown in FIGS. 7 and 8, the front heat exchanger mounting portion 9C extends in the left and right directions with an inverted U-shaped cross section, and the upper surface thereof is a flat surface 9C1. Further, the flat surface 9C1 is provided with a plurality of bolt fastening holes 9C2 for fastening the horizontal mounting portion 28C of the front side plate 28, for example, three at intervals in the left and right directions.

  Further, the fourth (last part) left extending beam 9D is disposed with a space for attaching a heat exchanger unit 19 to be described later on the rear side of the front heat exchanger attachment part 9C. The left overhanging beam 9D constitutes a rear heat exchanger mounting portion to which a rear side plate 29 described later is mounted (hereinafter, the fourth left overhanging beam 9D is referred to as “rear heat exchanger mounting portion 9D. "). The rear heat exchanger mounting portion 9D has an L-shaped cross section and extends in the left and right directions, and the rear end portion rises to form a rising surface 9D1. Further, the rising surface 9D1 is provided with a plurality of bolt fastening holes 9D2 for fastening the vertical mounting portion 29C of the rear side plate 29, for example, three at intervals in the left and right directions.

  On the other hand, a beam member 9E is provided between the front heat exchanger mounting portion 9C and the rear heat exchanger mounting portion 9D so as to extend in the front and rear directions. As shown in FIGS. 2 and 4, a lower portion of the heat exchanger assembly 20 described later is attached to the beam member 9E.

  Reference numeral 14 denotes a cab (see FIG. 1) which is located on the left front side of the revolving frame 5 and is mounted on the second left extension beam 9B and the cab support portion 13. The cab 14 is used by an operator. Inside the cab 14, a driver's seat on which an operator is seated, various operation levers, an indoor unit of an air conditioner, and the like (all not shown) are arranged.

  Reference numeral 15 denotes an engine provided on the rear side of the revolving frame 5 (see FIG. 2). The engine 15 is mounted in a horizontally placed state extending in the left and right directions, and includes, for example, a supercharger (not shown) that increases the flow rate of intake air. Here, the engine 15 has a water jacket (not shown) through which engine cooling water circulates, and the water jacket is connected to a radiator 21 described later that releases heat of the cooling water. In addition, the supercharger is connected to an intercooler 23 (to be described later) that releases heat of the compressed intake air, and the outflow side of the intercooler 23 is connected to the intake side of the engine 15.

  A cooling fan 15A that is rotationally driven by the engine 15 is provided on the left side of the engine 15, and the cooling fan 15A allows outside air to flow in as cooling air from an inlet 18E of a building cover 18 described later. .

  On the other hand, 16 is a hydraulic pump attached to the right side of the engine 15. The hydraulic pump 16 is driven by the engine 15 to discharge hydraulic oil as pressure oil toward the work device 4 and the like. Further, the hydraulic oil returned from the working device 4 or the like can be cooled by circulating an oil cooler 22 described later.

  Reference numeral 17 denotes a counterweight (see FIG. 1) attached to the rear end of the revolving frame 5. The counterweight 17 is in a weight balance with the work device 4 and is formed as a heavy object.

  Reference numeral 18 denotes a building cover (see FIGS. 1 and 2) provided on the revolving frame 5 between the cab 14 and the counterweight 17. This building cover 18 is positioned horizontally on the left and right sides of the revolving frame 5 and extends in the horizontal direction between the left and right side panels 18A and 18B extending in the front and rear directions and the upper ends of the side panels 18A and 18B. The upper surface panel 18C is generally constituted by an engine cover 18D that can be opened and closed. Further, the left side panel 18A of the building cover 18 is formed with an inlet 18E for allowing cooling air to be supplied to the radiator 21 and the like to flow in, and the right side panel 18B discharges the cooling air that has passed through the engine 15 and the like to the outside. An outlet 18F is formed.

  Next, heat exchange according to the first embodiment is provided to cool various fluids such as cooling water of the engine 15, hydraulic oil, intake air taken in by the engine 15, fuel, and refrigerant of the air conditioner with cooling air. The container unit will be described with reference to FIGS.

  Reference numeral 19 denotes a single heat exchanger unit provided in the building cover 18 located on the left side of the engine 15. This heat exchanger unit 19 combines a plurality of heat exchangers once with respect to the swivel frame 5 as shown in FIG. 4 by collecting the heat exchangers mounted on the upper swing body 3 of the excavator 1. It is configured as a single unit that can be attached to. For this reason, the assembly work of the heat exchanger unit 19 can be efficiently performed at a wide work site separate from the assembly line of the excavator 1.

  As shown in FIGS. 5 and 6, the heat exchanger unit 19 is roughly constituted by a heat exchanger assembly 20, a fuel cooler 26, a condenser 27, a front side plate 28, a rear side plate 29 and the like which will be described later.

  Reference numeral 20 denotes a heat exchanger assembly constituting a heat exchanger of the heat exchanger unit 19, and the heat exchanger assembly 20 is provided between a front side plate 28 and a rear side plate 29 described later. As shown in FIG. 6, the heat exchanger assembly 20 includes, for example, a radiator 21 and an oil cooler 22 which will be described later arranged in parallel with the flow direction of cooling air (left and right directions of the upper swing body 3). The intercooler 23 is connected by brackets 24 and 25.

  Reference numeral 21 denotes a radiator as a heat exchanger. The radiator 21 cools the cooling water whose temperature has been increased by cooling the engine 15. The radiator 21 is roughly constituted by an upper tank 21A, a lower tank 21B, and a heat radiating portion 21C, and each tank 21A, 21B is connected to a water jacket of the engine 15. On the other hand, the radiator 21 has an upper tank 21 </ b> A attached to an upper bracket 24 described later and a lower tank 21 </ b> B attached to a lower bracket 25.

  Reference numeral 22 denotes an oil cooler as a heat exchanger arranged in parallel with the radiator 21. The oil cooler 22 cools hydraulic oil so as to be flush with the front side (cab 14 side) position of the radiator 21. It is arranged. The oil cooler 22 is roughly constituted by an upper tank 22A, a lower tank 22B, and a heat radiating portion 22C, and hydraulic oil piping (not shown) is connected to each of the tanks 22A and 22B. On the other hand, the oil cooler 22 has an upper tank 22 </ b> A attached to an upper bracket 24, which will be described later, and a lower tank 22 </ b> B attached to a lower bracket 25 in the same manner as the radiator 21.

  Reference numeral 23 denotes an intercooler as a heat exchanger that is located on the rear side (counterweight 17 side) of the radiator 21 and is arranged in parallel with the radiator 21. The intercooler 23 cools the intake air supplied from the supercharger of the engine 15. The intercooler 23 is roughly configured by an upper tank 23A, a lower tank 23B, and a heat radiating portion 23C. The upper tank 23A is connected to the supercharger side, and the lower tank 23B is connected to the intake side of the engine 15. On the other hand, in the intercooler 23, the upper tank 23A is attached to the upper bracket 24 and the lower tank 23B is attached to the lower bracket 25 in substantially the same manner as the radiator 21.

  Here, the radiator 21, the oil cooler 22, and the intercooler 23 that constitute the heat exchanger assembly 20 are, for example, cooling air generated by the cooling fan 15 </ b> A of the engine 15 so that the cooling efficiency is improved and the cleaning work is facilitated. Are arranged side by side in the front and rear directions of the upper swing body 3 so as to be parallel to the flow direction of the upper revolving unit 3.

  Reference numeral 24 denotes an upper bracket provided on the radiator 21, the oil cooler 22, and the intercooler 23 so as to extend in the horizontal direction. The upper bracket 24 is bolted to the upper portions of the radiator 21, the oil cooler 22, and the intercooler 23. The upper bracket 24 is bolted to the upper portions of side plates 28 and 29 described later at both ends in the length direction.

  On the other hand, reference numeral 25 denotes a lower bracket provided extending horizontally in the lower part of the radiator 21, the oil cooler 22, and the intercooler 23. On the lower bracket 25, lower portions of the radiator 21, the oil cooler 22, and the intercooler 23 are attached. The lower bracket 25 is bolted at both ends in the length direction to the lower portions of the side plates 28 and 29, and is bolted to the beam member 9E of the left extending beam 9 constituting the revolving frame 5. (See FIGS. 2 and 4).

  A fuel cooler 26 is mounted between the side plates 28 and 29 together with the heat exchanger assembly 20. The fuel cooler 26 cools the fuel supplied to the engine 15 and constitutes one of the heat exchangers. ing. Reference numeral 27 denotes a condenser as a heat exchanger provided side by side on the rear side of the fuel cooler 26. The condenser 27 constitutes a part of the outdoor unit of the air conditioner and releases the heat of the refrigerant.

  Next, a pair of side plates 28 and 29 provided facing both sides in the width direction (front and rear directions) of the radiator 21, the oil cooler 22, the intercooler 23, and the connection connected to the side plates 28 and 29. The configurations of the member 30 and the inner surface plate 31 will be described with reference to FIGS.

A front side plate 28 is located on the front side of the oil cooler 22 and extends in the left and right directions. The front side plate 28 is formed, for example, by bending the periphery of a thin steel plate. That is, the front side plate 28, left, a generally planar main plate portion 28A erected while extending in the right direction, the bent portion 28B of the reinforcement which is formed substantially perpendicularly Te folded up around the main plate portion 28A And is roughly composed. Further, a horizontal attachment portion 28C for attaching the front side plate 28 to the flat surface 9C1 of the front heat exchanger attachment portion 9C is provided below the main plate portion 28A.

  Here, the horizontal attachment portion 28C of the front side plate 28 is integrally formed as a rectangular attachment plate extending in the horizontal direction by bending the lower portion of the main plate portion 28A toward the outside (front side) in the width direction at a substantially right angle. ing. The horizontal mounting portion 28C is provided with, for example, three bolt insertion holes 28D penetrating upward and downward.

  The horizontal mounting portion 28C is arranged so as to face upward and downward with respect to the flat surface 9C1 of the front heat exchanger mounting portion 9C provided on the revolving frame 5. At this time, since the horizontal mounting portion 28C can move freely in the horizontal direction on the flat surface 9C1, each bolt insertion hole 28D is displaced from each bolt fastening hole 9C2 of the front heat exchanger mounting portion 9C. Even so, each bolt insertion hole 28D can be aligned with each bolt fastening hole 9C2. When each bolt insertion hole 28D is aligned with each bolt fastening hole 9C2, a bolt 32 described later inserted into each bolt insertion hole 28D is fastened to each bolt fastening hole 9C2, whereby the front side plate 28 is moved to the front side. It can be attached to the heat exchanger attachment portion 9C.

29 is a rear side plate provided on the rear side of the intercooler 23 so as to face the front side plate 28. The rear side plate 29 is substantially the same as the front side plate 28, for example, by bending the periphery of a thin steel plate. It is formed extending in the left and right directions. That is, the rear side plate 29, left, a generally planar main plate portion 29A erected while extending in the right direction, the bent portion of the reinforcement which is formed around the main plate portion 29A substantially perpendicularly Te folded down 29B. A vertical mounting portion 29C for mounting the rear side plate 29 to the rising surface 9D1 of the rear heat exchanger mounting portion 9D is provided below the main plate portion 29A.

  Here, the vertical attachment portion 29C of the rear side surface plate 29 is integrally formed as a rectangular attachment plate extending in the vertical direction by extending the lower portion of the main plate portion 29A further downward. The vertical mounting portion 29C is provided with, for example, three bolt insertion holes 29D penetrating in the horizontal direction (front and rear directions).

  The vertical attachment portion 29C is disposed so as to face the rising surface 9D1 of the rear heat exchanger attachment portion 9D provided in the revolving frame 5 in the lateral direction (horizontal direction), and each bolt insertion hole 29D is provided for each of the bolt insertion holes 29D. Align with the bolt fastening hole 9D2. In this state, the rear side plate 29 can be attached to the rear heat exchanger attachment portion 9D by fastening the bolts 32 inserted into the respective bolt insertion holes 29D to the respective bolt fastening holes 9D2.

  Here, as shown in FIG. 5, the side plates 28 and 29 are separated from the left side panel 18A and the top panel 18C of the building cover 18 so as to partition the space and cooperate with the left side panel 18A and the top panel 18C. A space for accommodating the radiator 21, the oil cooler 22, the intercooler 23 and the like can be defined. This space distributes the cooling air flowing from the inlet 18E of the building cover 18 toward the radiator 21, the oil cooler 22, the intercooler 23, and the like.

  A connecting member 30 is provided so as to connect the front side plate 28 and the rear side plate 29 on the upper side. The connecting member 30 is a box extending forward and rearward on the upper side of the radiator 21, the oil cooler 22, and the intercooler 23. It is formed in a body shape. The front end side of the connecting member 30 is integrally attached to the upper portion of the front side plate 28, and the word end side is integrally attached to the upper portion of the rear side plate 29.

  Reference numeral 31 denotes an inner plate provided so as to close the space between the front side plate 28 and the rear side plate 29 on the engine 15 side. The inner plate 31 has a circular fan opening 31A in which the cooling fan 15A is disposed. Is formed.

  Reference numeral 32 denotes a plurality of bolts as fastening members provided for attaching the front side plate 28 and the rear side plate 29 to the revolving frame 5. The bolts 32 are inserted into the bolt insertion holes 28D and 29D and fastened to the bolt fastening holes 9C2 and 9D2, whereby the side plates 28 and 29 are attached to and removed from the heat exchanger attachment portions 9C and 9D. It is fixed as possible.

  When assembling the heat exchanger unit 19 configured as described above, the front side plate 28, the rear side plate 29, the connecting member 30, the inner plate 31 and the like are assembled. Further, the radiator 21, the oil cooler 22, and the intercooler 23 are arranged in parallel, and these are connected by the upper bracket 24 and the lower bracket 25 to form the heat exchanger assembly 20. A single heat exchanger unit 19 can be assembled by assembling the heat exchanger assembly 20, fuel cooler 26, condenser 27 and the like between the side plates 28 and 29.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, a heat exchanger provided in the upper swing body 3, that is, a radiator 21, an oil cooler 22, an intercooler 23, each side plate. A procedure for attaching the heat exchanger unit 19 composed of 28, 29 and the like to the revolving frame 5 will be described.

  First, the radiator 21 connected to the upper bracket 24 and the lower bracket 25 is assembled by assembling the front side plate 28, the rear side plate 29, the connecting member 30, and the inner surface plate 31 at a wide work site separate from the assembly line of the excavator 1. A single heat exchanger unit 19 is assembled as shown in FIG. 5 by attaching a heat exchanger assembly 20 comprising an oil cooler 22 and an intercooler 23, a fuel cooler 26, a condenser 27, and the like.

  When the heat exchanger unit 19 is assembled in this way, the heat exchanger unit 19 is transported to the assembly line of the lifting excavator 1 using a crane or the like, and the assembly work for the revolving frame 5 is started. Therefore, the assembly work of the heat exchanger unit 19 to the revolving frame 5 will be described with reference to FIGS. 7 to 10, in order to make it easy to see the mounting form of the heat exchanger unit 19 with respect to the revolving frame 5, the internal heat exchanger assembly 20 and the like are omitted, and the front side plate 28 and the rear side plate forming the frame body are omitted. 29, only the connecting member 30 and the inner surface plate 31 are shown.

  In the assembly operation of the heat exchanger unit 19, the heat exchanger unit 19 is lowered straight toward a predetermined position of the swivel frame 5 as shown in FIG. 7. At this time, the vertical mounting portion 29C of the rear side surface plate 29 does not need to be exactly along the rising surface 9D1 of the rear side heat exchanger mounting portion 9D, and as shown in FIG. 8, the rear side heat exchanger The heat exchanger unit 19 can be lowered with a gap formed between the attachment portion 9D and the rear side plate 29.

  Then, the heat exchanger unit 19 is lowered toward the revolving frame 5, and the horizontal mounting portion 28C of the front side plate 28 is opposed to the flat surface 9C1 of the front heat exchanger mounting portion 9C from the upper side. In this state, since the height position of the heat exchanger unit 19 is defined, the vertical mounting portion 29C of the rear side plate 29 is aligned upward and downward with respect to the rising surface 9D1 of the rear heat exchanger mounting portion 9D. can do. Next, the heat exchanger unit 19 is moved to the rear side until the vertical mounting portion 29C of the rear side surface plate 29 contacts the rising surface 9D1 of the rear side heat exchanger mounting portion 9D. Accordingly, the horizontal mounting portion 28C of the front side plate 28 can be aligned in the horizontal direction (front and rear directions) with respect to the flat surface 9C1 of the front heat exchanger mounting portion 9C.

  Therefore, as shown in FIGS. 9 and 10, the positions of the bolt insertion holes 28D and 29D of the mounting portions 28C and 29C and the bolt fastening holes 9C2 and 9D2 of the heat exchanger mounting portions 9C and 9D can be matched. The side plates 28 and 29 can be attached to the heat exchanger attachment portions 9C and 9D by fastening the bolts 32 inserted through the bolt insertion holes 28D and 29D into the bolt fastening holes 9C2 and 9D2. .

  Next, the operation of the hydraulic excavator 1 will be described. First, the operator gets on the cab 14 and sits on the driver's seat. By operating the operating lever in this state, the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. Further, the operator seated in the driver's seat can perform the excavation work of earth and sand, etc. by operating the operation lever for work to move the working device 4 up and down.

  When the excavator 1 is in operation, air is introduced from the inlet 18E of the building cover 18 by the cooling fan 15A of the engine 15, and this air is used as cooling air for the radiator 21 and the oil cooler of the heat exchanger assembly 20. 22, the fluid to be cooled can be cooled by supplying to the intercooler 23, the fuel cooler 26, and the condenser 27. Further, the cooling air that has passed through these flows through the periphery of the engine 15, the hydraulic pump 16, etc., and flows out from the outlet 18F.

  Thus, according to the first embodiment, the turning frame 5 is provided with the flat surface 9C1 at the front heat exchanger attachment portion 9C and the rising surface 9D1 at the rear heat exchanger attachment portion 9D. Further, the front side plate 28 constituting the heat exchanger unit 19 is provided with a horizontal mounting portion 28C fastened in a state of facing the flat surface 9C1 in the upward and downward directions, and the rear side plate 29 has a rising surface. The vertical mounting portion 29C is provided to be fastened in a state of facing the horizontal direction with respect to 9D1.

  Accordingly, in the operation of assembling the heat exchanger unit 19 to the revolving frame 5, the horizontal mounting portion 28C of the front side plate 28 is brought into contact with the flat surface 9C1 of the front heat exchanger mounting portion 9C from above, and in this state, heat exchange is performed. The appliance unit 19 is moved to the rear side, and the vertical attachment portion 29C of the rear side plate 29 is brought into contact with the rising surface 9D1 of the rear heat exchanger attachment portion 9D, whereby the bolt insertion holes 28D of the attachment portions 28C and 29C. , 29D and the bolt fastening holes 9C2, 9D2 of the heat exchanger mounting portions 9C, 9D can be easily and accurately aligned, and the fastening operation by the bolt 32 can be easily performed.

  As a result, when the heat exchanger unit 19 is attached to the revolving frame 5 using a crane or the like, a skilled crane operation technique is not required, and the side plates 28 and 29 are moved to the heat exchanger of the revolving frame 5 by a simple crane operation. Since it can arrange | position in the exact position of the attaching parts 9C and 9D, the assembly workability | operativity of the heat exchanger unit 19 can be improved.

  In addition, since the horizontal attachment portion 28C is integrally formed on the front side plate 28 and the vertical attachment portion 29C is integrally formed on the rear side plate 29, an increase in the number of parts can be suppressed, and assembly workability is improved. can do.

Next, FIG. 11 and FIG. 12 show a first reference example of the present invention. A feature of the first reference example is that a pair of flat surfaces are provided in the heat exchanger mounting portion of the vehicle body frame, and the pair of side plates are fastened in a state of facing the flat surfaces in the upward and downward directions. It is in the structure which provides an attaching part, respectively. In the first reference example are denoted by the same reference numerals to the same components as the form of implementation described above, and description thereof is omitted.

In FIGS. 11 and 12, reference numeral 41 denotes a left overhanging beam according to a reference example . The left overhanging beam 41 is composed of four left overhanging beams 41A to 41D (only two on the rear side are shown) arranged at a desired interval from the front side to the rear side. The third left overhanging beam 41C from the front side constitutes a heat exchanger mounting portion, and extends in the left and right directions with an inverted U-shaped cross-sectional shape (hereinafter referred to as the third left overhanging beam 41C). (Referred to as “front heat exchanger mounting portion 41C”). The upper surface of the front heat exchanger mounting portion 41C is a flat surface 41C1, and a plurality of bolt fastening holes 41C2 are provided on the flat surface 41C1.

  The fourth (last part) left-extending beam 41D constitutes a heat exchanger mounting portion, and has a reverse U-shaped cross-sectional shape in the left and right directions in substantially the same manner as the front heat exchanger mounting portion 41C. (Hereinafter, the fourth left extending beam 41D is referred to as “rear heat exchanger mounting portion 41D”). The upper surface of the rear heat exchanger mounting portion 41D is a flat surface 41D1, and the flat surface 41D1 is provided with a plurality of bolt fastening holes 41D2. Furthermore, a beam member 41E is provided between the front heat exchanger mounting portion 41C and the rear heat exchanger mounting portion 41D so as to extend in the front and rear directions.

Reference numeral 42 denotes a front side plate according to a reference example , and the front side plate 42 is roughly constituted by a main plate portion 42A, a bent portion 42B, and a front horizontal mounting portion 42C in substantially the same manner as the front side plate 28 according to the first embodiment. Yes. Here, the front horizontal mounting portion 42C is integrally formed as a rectangular mounting plate extending in the horizontal direction by bending the lower portion of the main plate portion 42A toward the outside in the width direction (front side) at a substantially right angle. Further, the front horizontal mounting portion 42C is provided with a bolt insertion hole 42D through which a later-described bolt 46 is inserted, penetrating upward and downward.

Reference numeral 43 denotes a rear side plate according to a reference example , and the rear side plate 43 includes a main plate portion 43A and a bent portion 43B in substantially the same manner as the front side plate 42 described above, and below the main plate portion 43A. A rear horizontal mounting portion 43C is provided. The rear horizontal mounting portion 43C extends in the horizontal direction by bending the lower portion of the main plate portion 43A to the outer side in the width direction (rear side) at a substantially right angle, similar to the front horizontal mounting portion 42C described above. It is integrally formed as a rectangular mounting plate. Further, the rear horizontal mounting portion 43C is provided with a bolt insertion hole 43D through which the bolt 46 is inserted, penetrating upward and downward.

  Further, 44 is a connecting member for connecting the front side plate 42 and the rear side plate 43, and 45 is an inner plate provided so as to close the space between the front side plate 42 and the rear side plate 43 on the engine 15 side. Yes. Reference numeral 45 denotes a bolt for fastening the horizontal mounting portions 42C and 43C of the side plates 42 and 43 to the heat exchanger mounting portions 41C and 41D.

Thus, also in the first reference example thus configured, it is possible to obtain substantially the same operational effect as in the implementation described above. In particular, according to the first reference example, since the horizontal mounting portions 42C and 42D are provided on both the front side surface plate 42 and the rear side surface plate 43, on the flat surfaces 41C1 and 41D1 of the heat exchanger mounting portions 41C and 41D. Can be moved greatly in any direction. As a result, the assembling work can be more easily performed.

Next, FIG. 13 shows a second reference example of the present invention. The feature of this reference example is that the horizontal mounting portion is formed as a separate member from the side plate and is attached to the side plate using a fixing means. In the second reference example are denoted by the same reference numerals to the same components as the form of implementation described above, and description thereof is omitted.

In FIG. 13, reference numeral 51 denotes a left overhanging beam according to the second reference example . The left overhanging beam 51 is composed of four left overhanging beams 51A to 51D (only two on the rear side are shown) arranged at a desired interval from the front side to the rear side. Also, the third left overhanging beam 51C from the front side constitutes one heat exchanger mounting portion and extends left and right with an inverted U-shaped cross-sectional shape (hereinafter referred to as the third left overhanging beam). The beam 51C is referred to as “front heat exchanger mounting portion 51C”). The upper surface of the front heat exchanger mounting portion 51C is a flat surface 51C1, and a plurality of bolt fastening holes 51C2 are provided on the flat surface 51C1.

Further, the fourth (last part) left extending beam 51D constitutes the other heat exchanger mounting part, and has a reverse U-shaped cross-sectional shape on the left, almost like the front heat exchanger mounting part 51C. It extends in the right direction (hereinafter, the fourth left extending beam 51D is referred to as “rear heat exchanger mounting portion 51D”). The upper surface of the rear heat exchanger mounting portion 51D is a flat surface 51D1, and a plurality of bolt fastening holes 51D2 are provided on the flat surface 51D1. Further, a beam member 51E is provided between the front heat exchanger mounting portion 51C and the rear heat exchanger mounting portion 51D so as to extend in the front and rear directions.

Reference numeral 52 denotes a front side plate according to the second reference example , and the front side plate 52 is roughly constituted by a main plate portion 52A and a bent portion (not shown) in substantially the same manner as the front side plate 28 according to the above embodiment. . However, the front side plate 52 according to the second reference example is different from the front side plate 28 according to the above-described embodiment in that a front horizontal mounting portion 54 described later, which is a separate member, is attached to the lower side plate.

53 is a rear side plate according to the second reference example , and the rear side plate 53 is substantially constituted by a main plate portion 53A and a bent portion (not shown) in substantially the same manner as the rear side plate 29 according to the above embodiment. Has been. However, the rear side surface plate 53 according to the second reference example is different from the rear side surface plate 29 according to the above-described embodiment in that a rear horizontal mounting portion 56 described later, which is a separate member, is attached to the lower side plate 53 of the second reference example. ing.

Reference numeral 54 denotes a front horizontal attachment portion according to the second reference example attached to the lower side of the front side plate 52. The front horizontal mounting portion 54 is formed as a separate member from the front side plate 52. The front horizontal mounting portion 54 is formed of a plate body bent in an L shape, and is formed on the lower side of the front side plate 52 so as to protrude from the lower portion of the front side plate 52 toward the outer side (front side) in the width direction. It is bolted. Further, the front horizontal mounting portion 54 is provided with a bolt insertion hole 54A through which the bolt 55 is inserted, penetrating upward and downward.

  Reference numeral 56 denotes a rear horizontal attachment portion attached to the lower side of the rear side plate 53. The rear horizontal mounting portion 56 is formed as a separate member from the rear side plate 53 in substantially the same manner as the front horizontal mounting portion 54 described above. Further, the rear horizontal mounting portion 56 is formed of a plate body bent in an L shape, and the rear side surface plate 53 protrudes from the lower portion of the rear side surface plate 53 toward the outer side (rear side) in the width direction. It is bolted to the underside. The rear horizontal mounting portion 56 is provided with a bolt insertion hole 56A through which the bolt 55 is inserted so as to penetrate upward and downward.

Thus, in the second reference example thus configured, it is possible to obtain substantially the same operational effect as in the implementation described above. In particular, according to the second reference example , since the horizontal mounting portions 54 and 56 are formed as separate members from the side plates 52 and 53, a plurality of types of the horizontal mounting portions 54 and 56 are prepared and different swivel frames 5 are provided. Accordingly, the side plates 52 and 53 can be attached as common parts to the plural types of swivel frames 5, and the manufacturing cost can be reduced.

  In the first embodiment, the case where the horizontal mounting portion 28C is configured to bend the lower portion of the front side plate 28 toward the outside (front side) in the width direction is described as an example. However, the present invention is not limited to this, and the horizontal mounting portion may be configured to bend the lower portion of the front side plate substantially at right angles toward the inner side (rear side) in the width direction. This configuration can be similarly applied to horizontal mounting portions according to other embodiments.

  Further, in the first embodiment, the case where the heat exchanger mounting portions 9C and 9D constituting the left extension beam 9 are formed as separate members spaced in the front and rear directions has been described as an example. However, the present invention is not limited to this. For example, a single overhanging beam may be formed wide in the front and rear directions, and heat exchanger mounting portions may be provided at both ends in the width direction. This configuration can be similarly applied to other embodiments.

On the other hand, in the second reference example , the case where the horizontal mounting portions 54 and 56 provided as separate members are bolted to the side plates 52 and 53 is illustrated. However, not limited to this, for example using other fixing means for welding, a horizontal mounting portion may be configured to be fixed to the side plate separately provided.

  Furthermore, in each embodiment, the crawler type hydraulic excavator 1 was described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body. Further, it can be widely applied to other construction machines such as a hydraulic crane, a wheel loader, and a tractor.

1 Excavator (construction machine)
2 Lower traveling body 3 Upper turning body 5 Turning frame (body frame)
9C, 41C, 51C Third left overhanging beam (heat exchanger mounting part)
9C1, 41C1, 41D1, 51C1, 51D1 Flat surface 9D, 41D, 51D Fourth left overhanging beam (heat exchanger mounting part)
9D1 Rising surface 19 Heat exchanger unit 21 Radiator (heat exchanger)
22 Oil cooler (heat exchanger)
23 Intercooler (heat exchanger)
26 Fuel cooler (heat exchanger)
27 Condenser (heat exchanger)
28, 42, 52 Front side plate 28A, 29A, 42A, 43A, 52A, 53A Main plate portion 28B, 29B, 42B, 43B Bending portion 28C Horizontal mounting portion 29, 43, 53 Rear side plate 29C Vertical mounting portion 32, 46, 55 Bolt 42C, 54 Front horizontal mounting part 43C, 56 Rear horizontal mounting part

Claims (2)

In a construction machine comprising a body frame that forms a support structure and a heat exchanger that is provided on the body frame and performs heat exchange of a fluid to be cooled,
The vehicle body frame has one heat exchanger mounting portion having a flat surface, and the other having a rising surface rising from the one heat exchanger mounting portion at a position spaced in the width direction of the heat exchanger. And a heat exchanger mounting part of
The heat exchanger is provided with a pair of side plates facing each other at both sides in the width direction,
On one side plate of the pair of side plates, bent the lower portion in the horizontal direction, on to the flat surface of the heat exchanger mounting portion of the one, is fastened in a state of facing downward integrally formed horizontal mounting portion that,
The vertical mounting attached to the other side plate of the pair of side plates is further tightened in a state where the lower portion extends further downward and faces the rising surface of the other heat exchanger mounting portion in the horizontal direction. construction machine is characterized in that a configuration you integrally formed parts.   The pair of side plates are located on the front side of the heat exchanger and extend leftward and rightward, and rear side plates provided on the rear side of the heat exchanger so as to face the front side plate The construction machine according to claim 1, wherein the horizontal mounting portion is provided on the front side plate, and the vertical mounting portion is provided on the rear side plate.

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