JP2008273236A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the workability when performing a changing work, a cleaning work or the like of a heat exchanger. <P>SOLUTION: A right engine unit 9 provided on a right side of a turning frame 5 comprises a base member 10 mounted on the turning frame 5, an engine assembly part 11 and a heat exchanger assembly part 17 which are mounted on the base member 10 in a dividing manner from each other. Similarly, a left engine unit provided on the left side of the turning frame 5 comprises a base member 25, an engine assembly part 26, and a heat exchanger assembly part 30. Thus, in the right engine unit 9, only the heat exchanger assembly part 17 can be singly detached while the engine assembly part 11 is left behind on the base member 10. In the left engine unit 24, only the heat exchanger assembly part 30 can be singly detached while the engine assembly part 26 is left behind on the base member 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction machine including an engine such as a hydraulic excavator or a hydraulic crane and a heat exchanger.

  In general, a hydraulic excavator as a typical example of a construction machine includes a self-propelled crawler-type lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front side of the upper revolving body And a work device provided so as to be movable up and down. The work device is used for excavating earth and sand.

  Further, the upper swing body usually includes a swing frame forming a support structure, a cab provided on the left side of the front portion of the swing frame, a counterweight attached to a rear end portion of the swing frame, and the counterweight. It is mainly constituted by a mounted device such as an engine and a heat exchanger arranged on the front side, a building that covers the mounted device, a fuel tank, and a hydraulic oil tank.

  Here, when a large excavator excavating a large amount of earth and sand is transported to the work site, the excavator is usually divided into a lower traveling body, an upper turning body, and a working device, and these lower traveling body and upper turning After the body and work device are loaded on different transportation means and transported to the work site, a hydraulic excavator is assembled at the work site.

  Further, for example, an ultra-large hydraulic excavator used for an open-pit digging work in a mine or the like has a very large outer diameter and weight of the lower traveling body, the upper swing body, and the working device. The upper swing body and the work device can be further divided into a plurality of parts (see, for example, Patent Document 1).

JP 2004-58796 A

  Here, the upper swing body constituting the ultra-large hydraulic excavator includes, for example, a swing frame, a counterweight attached to the rear end portion of the swing frame, a right engine unit attached to the right side of the swing frame, and a left side of the swing frame. The left engine unit is divided into a left engine unit, and the upper frame is assembled at the work site after the swivel frame, counterweight, left and right engine units are transported to the work site by separate transportation means. Yes.

  Here, the left and right engine units according to the prior art usually include a base member that is attached to the revolving frame by using bolts and the like, and an engine, a hydraulic pump, a heat exchanger, and the like mounted on the base member. The building is generally constituted by a building provided on the base member to cover these mounted devices.

  Thus, the left and right engine units constituting the upper swing body are each configured as a single unit in which the base member, the mounted device such as the engine, and the building are assembled together, and when the upper swing body is assembled, At the time of disassembly, the unit is attached to and detached from the swivel frame.

  However, the above-described engine unit according to the prior art is configured to be attached to the swivel frame in a state in which mounted devices such as an engine, a hydraulic pump, and a heat exchanger are accommodated in a building provided in the base member.

  For this reason, for example, when performing heat exchanger replacement work and careful cleaning work on the heat exchanger, it is necessary to remove the heat exchanger from the base member in a state in which a part of the building constituting the engine unit is disassembled. Yes, it is necessary to reassemble the disassembled building after the new heat exchanger has been attached to the base member.

  As described above, the engine unit according to the prior art must perform a complicated operation such as disassembling or reassembling a part of the building in which the heat exchanger is accommodated when performing a heat exchanger replacement operation or the like. However, there is a problem that the workability is lowered.

  In addition, when performing inspection work, cleaning work, etc. on the heat exchanger, the operator must get on and off between the upper revolving unit with a high ground level and the ground with heavy tools and replacement parts. There is a problem that the 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 provide a construction machine that can improve workability when performing exchange work, cleaning work, and the like for a heat exchanger. .

  In order to solve the above-described problems, the present invention is applied to a construction machine including a frame that forms a support structure and an engine unit that includes an engine and a heat exchanger and is detachably attached to the frame. .

  The invention of claim 1 is characterized in that the engine unit includes a base member attached to the frame, the engine mounted on the base member, and an engine building that covers the engine. The heat exchanger mounted on the base member and a heat exchanger assembly that covers the heat exchanger, and a heat exchanger assembly that can be divided independently of the engine assembly. There is.

  The invention of claim 2 is configured such that the heat exchanger includes a mounting frame body that is detachably attached to the base member using a fastening member, and a heat exchanger body that is held by the mounting frame body, The heat exchanger building is configured to be attached to the mounting frame.

  The invention of claim 3 comprises a self-propelled lower traveling body and an upper revolving body that is rotatably mounted on the lower traveling body, the upper revolving body comprising a revolving frame that forms a support structure; A right engine unit that includes an engine and a heat exchanger and is detachably attached to the right side of the swivel frame, and a left engine unit that includes the engine and a heat exchanger and is detachably attached to the left side of the swivel frame The right engine unit and the left engine unit each include a base member attached to the turning frame, the engine mounted on the base member, and an engine building that covers the engine. An engine assembly unit, the heat exchanger mounted on the base member, and a heat exchanger building covering the heat exchanger. Independently it lies in the structure by the dividable heat exchanger assembly portion with respect to emissions assembly unit.

  According to the first aspect of the present invention, the engine unit includes a base member attached to the frame, an engine assembly portion mounted on the base member, and heat mounted on the base member so as to be divided with respect to the engine assembly portion. Since it is configured by the exchanger assembly portion, only the heat exchanger assembly portion can be detached independently from the engine unit attached to the frame while leaving the engine assembly portion. For this reason, for example, when performing exchange work, cleaning work, etc. on the heat exchanger, the engine building etc. of the engine assembly part is disassembled and the heat exchanger assembly part is removed, or the disassembled engine building is reassembled. Therefore, workability such as replacement work and cleaning work for the heat exchanger can be improved.

  According to the invention of claim 2, by removing the mounting frame constituting the heat exchanger from the base member, the heat exchanger assembly composed of the heat exchanger and the heat exchanger building is integrated with the engine unit. Can be removed. Therefore, even when the engine unit is disposed at a high position from the ground, the heat exchanger assembly can be easily lowered to the ground using a crane or the like. Cleaning work and the like can be performed in a wide work space on the ground, and the workability can be improved.

  According to the invention of claim 3, the left and right engine units attached to the revolving frame are respectively connected to the base member attached to the revolving frame, the engine assembly portion mounted on the base member, and the engine assembly portion. Since the heat exchanger assembly is mounted on the base member so that it can be divided, only the heat exchanger assembly is left alone with the engine assembly remaining in both the left and right engine units. Can be removed, and workability such as replacement work and cleaning work for the heat exchanger can be improved.

  Hereinafter, an embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 12 by taking as an example a case where the construction machine is applied to a large hydraulic excavator.

  Reference numeral 1 denotes a large-sized hydraulic excavator as a typical example of a construction machine. The hydraulic excavator 1 is suitably used for, for example, an open pit operation in a mine. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and a front side of the upper revolving body 3. The operation apparatus 4 is configured to be movable.

  Here, as shown in FIG. 3 and FIG. 4, the upper swing body 3 forms a strong support structure and extends in the front and rear directions, and is attached to the rear end of the swing frame 5. A counterweight 6 that balances the weight with the apparatus 4, a right engine unit 9 that will be described later and attached to the right side of the swivel frame 5, and a rear engine that will be described later. The left engine unit 24 is generally configured.

  The revolving frame 5, the counterweight 6, the right engine unit 9, and the left engine unit 24 are individually transported to the work site by, for example, a transportation means such as a trailer or a cargo ship, and then used as the upper revolving unit 3 at the work site. It is a structure that can be assembled.

  Here, as shown in FIGS. 4 and 9, etc., the revolving frame 5 comprises a bottom plate 5A made of a thick steel plate and extending in the front and rear directions, and standing on the bottom plate 5A so as to face in the left and right directions. However, it is generally constituted by left and right vertical plates 5B and 5C extending in the front and rear directions. And the base end side of the working device 4 is rotatably attached to the front end side of the left and right vertical plates 5B and 5C, and the counterweight 6 is attached to the rear end side of the left and right vertical plates 5B and 5C. Is configured to be detachably attached. Further, a hydraulic oil tank 7 and a fuel tank 8 are arranged side by side in the front and rear directions at a portion of the revolving frame 5 that is in front of the counterweight 6.

  A right engine unit 9 is detachably attached to the right side of the turning frame 5, and the right engine unit 9 includes a single unit extending in the front and rear directions along the turning frame 5. The right engine unit 9 is roughly constituted by a base member 10, an engine assembly part 11, and a heat exchanger assembly part 17, which will be described later, as shown in FIGS.

  Reference numeral 10 denotes a base member serving as a base of the right engine unit 9, and the base member 10 is formed in a rectangular frame shape extending in the front and rear directions as a whole and forms a strong support structure. The base member 10 is detachably attached to the bottom plate 5A and the right vertical plate 5C of the revolving frame 5 using bolts or the like, and an engine assembly portion 11 and a heat exchanger assembly portion 17 which will be described later are mounted. Is.

  Reference numeral 11 denotes an engine assembly (engine assembly) mounted on the base member 10, and the engine assembly 11 includes an engine 12, a hydraulic pump 14, an oil cooler 15, an engine building 16, and the like which will be described later. .

  Reference numeral 12 denotes a right engine mounted on the rear side of the base member 10. The engine 12 is arranged in a vertically extending state extending in the front and rear directions, and is supported on the base member 10 via a plurality of mounting members 13. (See FIG. 5). A plurality of hydraulic pumps 14 are attached to the front end side of the engine 12, and each hydraulic pump 14 is driven by the engine 12, so that the hydraulic oil stored in the hydraulic oil tank 7 is transferred to the hydraulic excavator 1. It is pumped toward various mounted hydraulic actuators.

  Reference numeral 15 denotes a plurality of oil coolers mounted on the front side of the base member 10, and each oil cooler 15 cools return oil that returns to the hydraulic oil tank 7 from various hydraulic actuators mounted on the hydraulic excavator 1. It is. Each oil cooler 15 is accommodated in an engine building 16 described later together with the engine 12, the hydraulic pump 14, and the like.

  Reference numeral 16 denotes an engine building provided on the base member 10. The engine building 16 covers the engine 12, the hydraulic pump 14, the oil cooler 15 and the like mounted on the base member 10. And the engine building 16 comprises the engine assembly part 11 with the engine 12, the hydraulic pump 14, the oil cooler 15, etc. FIG.

  Here, the engine building 16 includes a frame-like building support frame 16A (see FIG. 5) provided on the base member 10, and an engine 12, a hydraulic pump 14, an oil cooler 15 and the like supported by the building support frame 16A. A rectangular parallelepiped box extending in the front and rear directions is formed by the covering building cover 16B (see FIGS. 4 and 9). In this case, the rear end portion 16C of the engine building 16 is an open end, and a heat exchanger assembly 17 described later is disposed so as to close the rear end portion 16C of the engine building 16. It has become.

  Reference numeral 17 denotes a heat exchanger assembly part (heat exchanger assembly) that constitutes the right engine unit 9 together with the engine assembly part 11, and the heat exchanger assembly part 17 is an engine as shown in FIGS. The assembly part 11 is configured to be divided independently. And the heat exchanger assembly part 17 is comprised roughly by the below-mentioned heat exchanger 18 and the heat exchanger building 22, and as shown in FIG. 3 etc., the position which obstruct | occludes the rear-end part 16C of the engine building 16 It is arranged.

  Reference numeral 18 denotes a heat exchanger that constitutes the heat exchanger assembly 17, and the heat exchanger 18 includes a mounting frame 19 that will be described later that is attached to the base member 10, and a heat that will be described later that is held by the mounting frame 19. It is generally constituted by the exchanger body 21.

  Reference numeral 19 denotes an attachment frame that serves as a base of the heat exchanger 18. The attachment frame 19 is detachably attached to the rear end portion of the base member 10 and holds a heat exchanger main body 21 described later. Here, as shown in FIGS. 5 to 7, the attachment frame 19 is formed in a rectangular frame extending in the left and right directions, and forms a strong support structure.

  And the lower end part of the attachment frame 19 is detachably attached to the rear end part of the base member 10 using a plurality of bolts 20 as fastening members, and a heat exchanger body 21 to be described later is attached to the attachment frame 19. Is held, and a heat exchanger building 22 to be described later is attached.

  Reference numeral 21 denotes a heat exchanger main body held by the mounting frame 19, and the heat exchanger main body 21 includes a radiator 21A, an intercooler 21B, and a cooling fan 21C, which will be described later, as shown in FIGS. It is roughly structured.

  Here, the radiator 21A has a heat radiating portion through which the cooling water of the engine 12 circulates, and the cooling air generated by the cooling fan 21C passes through the heat radiating portion, so that the heat of the engine cooling water is radiated into the cooling air. The engine cooling water is then cooled. The intercooler 21B is disposed on the front side of the radiator 21A, and cools the intake air by radiating heat of the air sucked by the turbocharger (not shown) into the cooling air.

  The cooling fan 21C is a fan motor using, for example, a hydraulic motor, and a plurality of (for example, four) cooling fans 21C are arranged on the front side of the intercooler 21B. Each cooling fan 21C cools engine cooling water and intake air by sucking outside air and supplying it as cooling air to the radiator 21A and the intercooler 21B.

  Reference numeral 22 denotes a heat exchanger building attached to the mounting frame 19 of the heat exchanger 18, and the heat exchanger building 22 surrounds the heat exchanger main body 21 as shown in FIGS. The building support frame 22 </ b> A is erected on the mounting frame 19, and the exterior cover 22 </ b> B is provided outside the building support frame 22 </ b> A. A cooling air inlet 22C that guides the cooling air from each cooling fan 21C to the radiator 21A and the intercooler 21B is provided in a portion of the exterior cover 22B that faces the radiator 21A of the heat exchanger main body 21 (FIG. 9).

  Thus, the heat exchanger 18 constituting the heat exchanger assembly part 17 includes a mounting frame 19 that is detachably attached to the base member 10 of the right engine unit 9 using the bolts 20, and the mounting frame 19. The heat exchanger building 22 is attached to the mounting frame 19 together with the heat exchanger main body 21.

  Therefore, by removing the mounting frame 19 from the base member 10, the heat exchanger assembly 17 can be divided independently from the engine assembly 11, for example, as shown in FIG. By lifting the heat exchanger assembly 17 by itself, it is possible to install and remove only the heat exchanger assembly 17 from the right engine unit 9 while leaving the engine assembly 11 alone. It can be configured.

  Reference numeral 24 denotes a left engine unit that is detachably attached to the left side of the turning frame 5, and the left engine unit 24 includes a single unit that extends forward and rearward along the turning frame 5. The left engine unit 24 is also roughly constituted by a base member 25 (described later), an engine assembly portion 26, and a heat exchanger assembly portion 30 in substantially the same manner as the right engine unit 9 described above (FIG. 4). FIG. 10).

  Reference numeral 25 denotes a base member serving as a base of the left engine unit 24. The base member 25 is formed in a rectangular frame shape extending in the front and rear directions as a whole, and forms a strong support structure. The base member 25 is detachably attached to the bottom plate 5A and the left vertical plate 5B of the revolving frame 5 using bolts or the like, and an engine assembly portion 26, a heat exchanger assembly portion 30 and the like which will be described later are mounted. Is.

  Reference numeral 26 denotes an engine assembly portion (engine assembly) mounted on the base member 25. The engine assembly portion 26 is roughly constituted by an engine 27, a hydraulic pump 28, an engine building 29 and the like which will be described later.

  Reference numeral 27 denotes a left engine mounted on the rear side of the base member 25. As shown in FIG. 4 and the like, the engine 27 is supported on the base member 25 in a vertically placed state extending in the front and rear directions. A plurality of hydraulic pumps 28 that supply pressure oil to various hydraulic actuators mounted on the hydraulic excavator 1 are attached to the front end side of the engine 27.

  Reference numeral 29 denotes an engine building provided on the base member 25. The engine building 29 covers the engine 27, the hydraulic pump 28 and the like mounted on the base member 25. And the engine building 29 comprises the engine assembly part 26 with the engine 27, the hydraulic pump 28, etc. FIG.

  Here, the engine building 29 includes a frame-shaped building support frame (not shown) provided on the base member 25, and a building cover 29A supported by the building support frame and covering the engine 27, the hydraulic pump 28, and the like. It is formed in a rectangular parallelepiped box extending in the front and rear directions (see FIGS. 4 and 10). Further, the rear end portion 29B of the engine building 29 is an open end, and a heat exchanger assembly portion 30 described later is disposed so as to close the rear end portion 29B of the engine building 29. ing.

  Reference numeral 30 denotes a heat exchanger assembly portion (heat exchanger assembly) that constitutes the left engine unit 24 together with the engine assembly portion 26. The heat exchanger assembly portion 30 includes an engine assembly portion as shown in FIG. 26 can be divided independently. The heat exchanger assembly 30 is roughly constituted by a heat exchanger 31 and a heat exchanger building 34, which will be described later, and is disposed at a position where the rear end 29B of the engine building 29 is closed.

  31 is a heat exchanger that constitutes the heat exchanger assembly 30, and the heat exchanger 31 is similar to the heat exchanger 18 that constitutes the heat exchanger assembly 17 of the right engine unit 9. An attachment frame body 32 attached to the attachment frame body and a heat exchanger main body 33 held by the attachment frame body 32 are roughly configured. And the heat exchanger main body 33 is the same as the heat exchanger main body 21 of the heat exchanger 18 mentioned above, The radiator 33A which cools the engine cooling water of the engine 27, The intercooler 33B which cools the intake air of the engine 27, A plurality of cooling fans 33C are included.

  Reference numeral 34 denotes a heat exchanger building attached to the attachment frame 32 of the heat exchanger 31, and the heat exchanger building 34 is a framework standing on the attachment frame 32 so as to surround the heat exchanger main body 33. It is comprised by 34-shaped building support frame 34A and the exterior cover 34B provided in the outer side of this building support frame 34A. The exterior cover 34B is provided with a cooling air inlet 34C that guides the cooling air to the heat exchanger body 33 shown in FIG. 4 (see FIG. 10).

  As described above, the heat exchanger 31 constituting the heat exchanger assembly portion 30 includes the mounting frame 32 that is detachably attached to the base member 25 of the left engine unit 24, and the heat that is held by the mounting frame 32. The heat exchanger building 34 is attached to the attachment frame 32 together with the heat exchanger main body 33.

  Therefore, by removing the mounting frame 32 from the base member 25, the heat exchanger assembly part 30 can be divided independently from the engine assembly part 26, and a heat exchanger assembly part can be obtained using a crane or the like. By suspending 30 alone, only the heat exchanger assembly 30 can be attached and removed from the left engine unit 24 while the engine assembly 26 remains.

  Reference numeral 35 denotes a cab bed provided on the front side of the base member 25 constituting the left engine unit 24. The cab bed 35 is formed of a rectangular tubular box and supports a cab 36 described later.

  Reference numeral 36 denotes a cab disposed on the left side of the front portion of the upper swing body 3, and the cab 36 is mounted on a cab bed 35 provided in the left engine unit 24. In the cab 36, a driver's seat where an operator is seated, operating devices such as an operating lever and a traveling lever (all not shown) are arranged.

  Reference numeral 37 denotes a right passage member attached to the base member 10 of the right engine unit 9. The passage member 37 extends forward and rearward along the right engine unit 9 and performs an inspection operation on the engine 12 and the like. The passage is formed. Reference numeral 38 denotes a left side passage member attached to the base member 25 of the left engine unit 24. The passage member 38 extends forward and rearward along the left engine unit 24, and is an operator who performs inspection work on the engine 27 and the like. The passage is formed.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, a procedure for assembling the upper swing body 3 of the hydraulic excavator 1 will be described with reference to FIGS. 9 to 12. The assembly work of the upper swing body 3 is normally performed with the swing frame 5 mounted on the lower traveling body, but FIGS. 9 to 11 show the lower traveling body in a state where the lower traveling body is omitted for simplification. .

  First, as shown in FIG. 9, the right engine unit 9 is disposed on the right side of the turning frame 5 using a crane or the like (not shown). Then, the base member 10 of the right engine unit 9 is attached to the right vertical plate 5C of the revolving frame 5 using bolts. In this case, the right engine unit 9 includes a base member 10 and an engine assembly portion 11 and a heat exchanger assembly portion 17 that are attached to the base member 10 so as to be separated from each other.

  For this reason, for example, after attaching the base member 10 to the revolving frame 5 with the engine assembly portion 11 attached to the base member 10, only the heat exchanger assembly portion 17 is provided alone on the rear side of the base member 10. Can be installed.

  Next, as shown in FIG. 10, the left engine unit 24 is arranged on the left side of the turning frame 5 using a crane or the like. Then, the base member 25 of the left engine unit 24 is attached to the left vertical plate 5B of the revolving frame 5 using bolts. In this case, the left engine unit 24 includes a base member 25, and an engine assembly portion 26 and a heat exchanger assembly portion 30 that are attached to the base member 25 so as to be separable from each other.

  For this reason, for example, after attaching the base member 25 to the revolving frame 5 with the engine assembly portion 26 attached to the base member 25, only the heat exchanger assembly portion 30 is provided alone on the rear side of the base member 25. Can be installed.

  11, with the right engine unit 9 attached to the right side of the turning frame 5 and the left engine unit 24 attached to the left side of the turning frame 5, the rear of the turning frame 5 as shown in FIG. The counterweight 6 is attached to the end, and the cab 36 is attached on the cab bed 35 arranged on the front side of the left engine unit 24. Further, for example, by attaching the passage member 37 to the base member 10 of the right engine unit 9 and attaching the passage member 38 to the base member 25 of the left engine unit 24, the upper swing body 3 can be assembled.

  Next, when the upper revolving unit 3 is assembled, for example, when performing replacement work and cleaning work for the radiator 21A and the intercooler 21B (heat exchanger body 21) constituting the heat exchanger 18 of the right engine unit 9 7 and 8, the bolts 20 for fixing the mounting frame 19 of the heat exchanger 18 to the base member 10 of the right engine unit 9 are removed, so that the heat exchanger assembly 17 is mounted on the engine assembly. The solid part 11 is divided.

  In this way, it is possible to remove only the heat exchanger assembly 17 from the right engine unit 9 arranged at a high position from the ground, and to lower the heat exchanger assembly 17 to the ground using the crane 23 alone. it can. Thereby, in a state where the heat exchanger assembly 17 is lowered to the ground, replacement work and cleaning work for the radiator 21A and the intercooler 21B of the heat exchanger 18 can be performed in a wide work space. Can be increased.

  Then, after the replacement work, cleaning work, and the like for the radiator 21A and the intercooler 21B of the heat exchanger 18 are completed, the heat exchanger assembly 17 is lifted using the crane 23 as shown in FIG. 9 on the base member 10. Then, as shown in FIG. 7, the mounting frame 19 of the heat exchanger 18 is fastened to the base member 10 using bolts 20 so that the heat exchanger assembly 17 is disposed at a predetermined position of the right engine unit 9. Can be set.

  In this way, when performing exchange work, cleaning work, etc. on the radiator 21A and the intercooler 21B constituting the heat exchanger 18, the heat exchanger assembly part 17 is divided from the engine assembly part 11, and this heat exchanger assembly Only the three-dimensional part 17 can be detached from the right engine unit 9 alone. Therefore, in order to remove the radiator 21A and the intercooler 21B of the heat exchanger 18 from the right engine unit 9, the troublesome work of disassembling the engine building 16 and the like of the engine assembly portion 11 can be eliminated, and replacement work and cleaning work can be performed. Workability can be improved.

  Thus, according to the present embodiment, the right engine unit 9 provided on the right side of the revolving frame 5 is mounted on the revolving frame 5, and the engine assembly is mounted on the base member 10 so as to be separated from each other. Since the heat exchanger assembly part 17 and the heat exchanger assembly part 17 are configured, it is possible to remove only the heat exchanger assembly part 17 from the right engine unit 9 alone while leaving the engine assembly part 11 on the base member 10. it can.

  As a result, the engine building 16 and the like of the engine assembly part 11 are disassembled in order to remove the heat exchanger 18 from the right engine unit 9 when performing replacement work, cleaning work, and the like for the radiator 21A and the intercooler 21B of the heat exchanger 18. Or a complicated operation such as reassembling the disassembled engine building 16 or the like can be eliminated, so that the workability of the replacement work and the cleaning work can be improved.

  In addition, the heat exchanger 18 is detachably attached to the base member 10 of the right engine unit 9 using bolts 20, and the heat exchanger main body 21 (radiator 21 </ b> A) held by the attachment frame 19. , The intercooler 21B) and the heat exchanger building 22 attached to the attachment frame body 19, so that the heat exchanger 18 and the heat exchanger building 22 can be removed by removing the attachment frame body 19 from the base member 10. The heat exchanger assembly 17 can be integrally removed from the right engine unit 9.

  Therefore, even when the right engine unit 9 is disposed at a high position from the ground, the entire heat exchanger assembly 17 can be easily lowered to the ground using the crane 23 or the like. Accordingly, replacement work, cleaning work, and the like for the radiator 21A and the intercooler 21B can be performed in a wide work space on the ground, and the workability can be improved.

  On the other hand, a left engine unit 24 provided on the left side of the revolving frame 5 is provided with a base member 25 attached to the revolving frame 5, an engine assembly portion 26 and a heat exchanger assembly mounted on the base member 25 so as to be separated from each other. Therefore, only the heat exchanger assembly 30 can be detached from the left engine unit 24 while leaving the engine assembly 26 on the base member 25. Therefore, for the same reason as described above, it is possible to improve workability when performing exchange work, cleaning work, etc. for the radiator 33A and the intercooler 33B of the heat exchanger 31.

  In the above-described embodiment, the case where the heat exchanger 18 including the radiator 21A and the intercooler 21B is used as the heat exchanger assembly 17 of the right engine unit 9 is illustrated. However, the present invention is not limited to this, and for example, a heat exchanger constituted by a single radiator or a heat exchanger constituted by an oil cooler alone may be used. Furthermore, you may use the heat exchanger comprised by three members, a radiator, an intercooler, and an oil cooler. The same applies to the heat exchanger 31 constituting the left engine unit 24.

  In the above-described embodiment, the right engine unit 9 is constituted by the engine assembly portion 11 and the heat exchanger assembly portion 17, and the left engine unit 24 is constituted by the engine assembly portion 26 and the heat exchanger assembly portion 30. The case where it comprises by is illustrated. However, the present invention is not limited to this. For example, one of the left and right engine units may be constituted by an engine assembly portion and a heat exchanger assembly portion.

  Further, in the above-described embodiment, the right engine unit 9 is arranged to extend forward and rearward on the right side of the revolving frame 5 constituting the ultra-large hydraulic excavator 1 so that the engine 12 is in a vertically placed state, An example is shown in which the left engine unit 24 is disposed on the left side of the revolving frame 5 so as to extend in the front and rear directions so that the engine 27 is in a vertically placed state. However, the present invention is not limited to this, and the engine 12 of the right engine unit 9 is disposed in a horizontally extending state extending left and right, and the engine 27 of the left engine unit 24 is horizontally disposed extending left and right. It is good also as a structure arrange | positioned.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a rear view which shows a hydraulic shovel. FIG. 3 is a transverse cross-sectional view of the arrangement of a revolving frame, left and right engine units, counterweights, and the like constituting the upper revolving structure as seen from the direction of arrows III-III in FIG. 1. FIG. 4 is an exploded view showing the turning frame, the left and right engine units, and the counterweight in FIG. 3 in an exploded manner. It is an enlarged view which shows the engine assembly part and heat exchanger assembly part which comprise a right engine unit. It is sectional drawing which looked at the heat exchanger of the right engine unit from the arrow VI-VI direction in FIG. It is the principal part enlarged view to which the attachment part of the base member of a right engine unit and the attachment frame body of a heat exchanger was expanded. It is an enlarged view which shows the state which removes a heat exchanger assembly part from a right engine unit. It is a disassembled perspective view which shows the state which attaches a right engine unit to a turning frame. It is a disassembled perspective view which shows the state which attaches a left engine unit to a turning frame. It is a perspective view which shows the state which attached the left and right engine unit to the turning frame. It is a perspective view which shows the state which assembled the upper revolving body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Upper turning body 5 Turning frame (frame)
9 Right engine unit 10, 25 Base member 11, 26 Engine assembly part 12, 27 Engine 16, 29 Engine building 17, 30 Heat exchanger assembly part 18, 31 Heat exchanger 19, 32 Mounting frame 20 Bolt (fastening) Element)
21, 33 Heat exchanger body 22, 34 Heat exchanger building 24 Left engine unit

Claims (3)

In a construction machine comprising a frame that forms a support structure, and an engine unit that includes an engine and a heat exchanger and is detachably attached to the frame.
The engine unit includes a base member attached to the frame, an engine assembly having an engine mounted on the base member and an engine building covering the engine, and the heat exchanger mounted on the base member. And a heat exchanger assembly that covers the heat exchanger and has a heat exchanger assembly that can be divided independently of the engine assembly.   The heat exchanger includes a mounting frame that is detachably attached to the base member using a fastening member, and a heat exchanger body that is held by the mounting frame, and the heat exchanger building is the mounting The construction machine according to claim 1, wherein the construction machine is configured to be attached to a frame. It comprises a lower traveling body capable of self-propelling and an upper revolving body mounted on the lower traveling body so as to be able to swivel, and the upper revolving body includes a revolving frame forming a support structure, an engine, and a heat exchanger. A right engine unit that is detachably attached to the right side of the swivel frame and a left engine unit that includes an engine and a heat exchanger and is detachably attached to the left side of the swivel frame In
The right engine unit and the left engine unit respectively include a base member attached to the revolving frame, an engine assembly portion including the engine mounted on the base member and an engine building covering the engine, and the base member The heat exchanger mounted on the heat exchanger and the heat exchanger building that covers the heat exchanger, and the heat exchanger assembly that can be divided independently of the engine assembly. And construction machinery.

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