JP2012241327A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability when attaching loading equipment to a frame.SOLUTION: By attaching first electrical equipment 36 through a vibration-proof mount 38 to a floor board 35 configured attachably and detachably to/from a revolving frame 5, a loading equipment assembly 34 is assembled beforehand, and the floor board 35 of the loading equipment assembly 34 is attached to the revolving frame 5 at a position of a utility chamber 29. In such a manner, by forming the loading equipment assembly 34 by attaching the first electrical equipment 36 to the floor board 35 which is a component of the revolving frame 5, the loading equipment assembly 34 is miniaturized. As a result, when attaching and detaching the loading equipment assembly 34 to/from the revolving frame 5 at a position 5A of the utility chamber 29, a large work space is secured around the loading equipment assembly 34, and the workability is improved.

Description

  The present invention relates to a construction machine such as a hydraulic excavator or a wheel loader.

  In general, a hydraulic excavator as a typical example of a construction machine has a vehicle body constituted by a lower traveling body that can be self-propelled and an upper revolving body that is mounted on the lower traveling body through a swirling wheel so as to be capable of turning. A work device for performing excavation work or the like is provided on the front side of the revolving structure.

  Here, a turning device for turning the upper turning body is provided between the lower traveling body and the upper turning body, and an electric motor is used as a turning motor constituting the turning device, a so-called hybrid. A type of construction machine has been proposed. In this case, the electric motor used for the swing motor includes an electric device containing an electric component such as an inverter circuit that converts a driving current supplied to the electric motor into direct current and alternating current, and an electric motor for driving the electric motor. An electrical device that houses an electrical component such as a capacitor that stores electrical energy is connected via a cable.

  A hybrid hydraulic excavator needs to include the above-described electrical equipment in addition to the engine, the hydraulic equipment, and the like, and securing the installation location and the installation environment at the installation location are issues. As a solution to this problem, the one described in Patent Document 1 has been proposed. In this patent document 1, a frame-like gantry is provided to stand on a vehicle body frame, and the gantry is provided so as to avoid a hydraulic device, so that an electrical device is provided in an upper portion of a hydraulic device arrangement space. .

JP 2010-270555 A

  However, in the hydraulic excavator according to the related art described above, a base provided on the vehicle body frame is large in order to install electric devices such as a power storage device and a controller. Furthermore, the electrical equipment provided on the gantry has a complicated structure provided on the upper and lower surfaces of the top plate provided on the gantry. Since this gantry is provided at the top of the hydraulic equipment so as to avoid interference with the hydraulic equipment, a sufficient working space cannot be secured due to the positional relationship with the hydraulic equipment, and the installation work There is a problem that workability deteriorates.

  Further, since the number of parts for forming the gantry increases and a great deal of time is also spent on the assembling work of the gantry, the manufacturing cost of the entire assembly in which the electrical equipment is attached to the gantry increases. There is.

  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 capable of improving workability when mounting a mounted device on a frame.

  In order to solve the above-described problems, the present invention provides a frame that forms a support structure for a vehicle body, a cab that is provided on the front side of the frame and that defines a cab, and the vehicle body that is provided on the rear side of the frame. A machine room that houses a prime mover necessary for driving the building and is covered with a building cover, a housing space that is provided in the building cover together with the machine room and is closed by a floor plate, and can accommodate equipment or fixtures, and the housing space The present invention is applied to a construction machine constituted by a mounting device mounted on an inner floor board.

  A feature of the configuration adopted by the invention of claim 1 is that the floor plate of the housing space is configured to be detachable from the frame, and the floor plate and the mounted device are assembled in advance via a vibration isolating member. A single mounting device assembly is formed by the above-described method, and the floor board forming the mounting device assembly is attached to the frame at the position of the accommodation space.

  According to a second aspect of the present invention, the storage space is a utility chamber that is provided at a rear portion of the cab and is covered with a door cover that can be opened and closed and is closed by the floor plate.

  According to a third aspect of the present invention, the vibration isolating member includes a device side mounting portion that is mounted on the mounted device, a floor plate side mounting portion that is mounted on the floor plate, and a space between the device side mounting portion and the floor plate side mounting portion. The elastic member provided and a bolt provided in the floor plate side mounting portion and inserted through the floor plate, and mounting the device side mounting portion of the vibration isolation member on the lower surface of the mounted device, and the vibration isolation member The mounting device assembly is formed by fastening the bolts to the floor plate, and the floor plate of the mounting device assembly is attached to the frame using a fastening member in a state of being mounted on the frame. It is in.

  According to a fourth aspect of the present invention, the floor plate side mounting portion of the vibration isolation member is provided with a rotation stop member that prevents the vibration isolation member from rotating relative to the floor plate by engaging with the floor plate. It is to have done.

  According to a fifth aspect of the present invention, there is provided a configuration in which a rope latch for hooking a rope for lifting the mounted device assembly is attached to the floor plate of the mounted device assembly.

The invention of claim 6 is that an electric device is mounted on the frame, and the mounted device is constituted by an electric device connected to the electric device via a cable.

  According to the first aspect of the present invention, by mounting the mounted device on the floor plate configured to be detachable with respect to the frame via the vibration isolating member, the mounted device assembly is originally utilized using the floor plate which is a component member of the frame. Can be formed. For this reason, it is not necessary to use a stand or the like made of a member different from the frame. After forming the mounted device assembly, the floor plate constituting the mounted device assembly is simply attached to a position corresponding to the accommodation space in the frame. The mounted equipment can be quickly and easily arranged in the accommodation space.

  In addition, the mounted device assembly can be made as small as possible by attaching the mounted device to the floor plate which is a structural member of the frame to form the mounted device assembly. As a result, a large working space can be secured around the mounted device assembly when the mounted device assembly is attached to and removed from the frame at the position of the accommodation space. Workability when installing and removing can be improved.

  Furthermore, by mounting the mounting equipment on the floor plate, which is a component of the frame, the number of parts in the mounting equipment assembly can be reduced compared to the case where a stand made of a member other than the frame is used. The assembly workability of the device assembly can be improved, and the manufacturing cost of the mounted device assembly can be reduced.

  According to the second aspect of the present invention, since the accommodation space is a utility room that is provided at the rear portion of the cab and is covered by a door cover that can be opened and closed, maintenance of the mounted device can be performed by opening and closing the door cover. At the same time, since a space provided in advance for housing equipment and the like of the construction machine can be used effectively, it is possible to easily install additional equipment.

  According to the invention of claim 3, after the floor plate of the mounted equipment assembly is once placed on the frame, the mounted equipment assembly can be attached to the frame by attaching the floor board to the frame using the fastening member. . For this reason, since the mounting / dismounting operation of the mounted device assembly with respect to the frame can be performed from above and below, the workability can be further improved.

  According to the invention of claim 4, when the bolt projecting from the floor plate side mounting portion of the vibration isolating member is inserted into the floor plate and fastened, the locking member provided at the floor plate side mounting portion is engaged with the floor plate. Thereby, it can suppress that a vibration isolating member rotates with respect to a floor board. For this reason, even if the frame vibrates during the operation of the construction machine, it is possible to prevent the mounting portion between the vibration isolating member and the floor board from being loosened, and the floor vibration fixed to the frame is stable over the long term. The mounted equipment can be supported in a state.

  According to the fifth aspect of the present invention, it is possible to lift the mounted equipment assembly using the rope by hooking the rope on the rope hook attached to the floor board. Therefore, the mounted equipment assembly, which is a heavy object, can be easily attached to and detached from the frame by lifting it using a rope.

  According to the invention of claim 6, since the electric device can be attached to the floor plate attached to the frame via the vibration isolating member, it is possible to suppress the vibration of the frame from being transmitted to the electric device through the floor plate by the vibration isolating member. It is possible to protect the electric device from vibration.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a perspective view which shows an upper revolving body in the state which removed the front door and the rear door. It is a top view which shows the state which attached the engine, the turning apparatus, the 1st, 2nd electric equipment etc. on the turning frame. It is a perspective view which shows the state which attached the turning apparatus, the 1st, 2nd electric equipment, and the front partition plate on the turning frame. FIG. 5 is an exploded perspective view showing a state where a front partition plate in FIG. 4 is omitted and a cover is removed from a second electric device. It is a disassembled perspective view which shows a 1st electric equipment and a floor board. It is sectional drawing which looked at the attachment state of the 1st electric equipment with respect to a turning frame from the arrow VII-VII direction in FIG. It is sectional drawing which looked at the vibration isolator from the arrow VIII-VIII direction in FIG. It is a block diagram which shows the connection relation of the electric motor used for a turning apparatus, and the 1st, 2nd electric equipment. It is process drawing of the assembly work which shows the vibration proof mount attachment process which attaches the vibration proof mount to the 1st electric equipment. It is process drawing of the assembly work which shows the floor board attachment process which attaches a floor board to a vibration proof mount. It is process drawing of the assembly operation which shows the assembly lifting process which lifts a mounting apparatus assembly using a rope. It is process drawing of the assembly work which shows the assembly attachment process which attaches a mounting apparatus assembly to a turning frame.

  Hereinafter, the embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 13 by taking as an example a case where the construction machine is applied to a hydraulic excavator.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and an upper swing that is rotatably mounted on the lower traveling body 2. A vehicle body is constituted by the body 3. A working device 4 is provided on the front side of the upper swing body 3 so as to be able to move up and down, and the working device 4 performs excavation work of earth and sand.

  Reference numeral 5 denotes a revolving frame serving as a base of the upper revolving structure 3, and the revolving frame 5 is formed in a thick flat plate shape and extends in the front and rear directions as shown in FIG. The left vertical plate 7 and the right vertical plate 8 which are erected on the left and right and extend in the front and rear directions while facing the left and right sides, the left extension beam 9 provided to protrude from the left vertical plate 7 to the left side, A right overhanging beam 10 extending rightward from the vertical plate 8, a left side frame 11 which is fixed to the front end side of each left overhanging beam 9 and extends in the front and rear directions, and a front end side of each right overhanging beam 10 The right side frame 12 that is fixed to the front and extends in the front and rear directions is roughly configured to form a strong support structure.

  Further, a turning device 30 described later is provided between the left and right vertical plates 7 and 8 at an intermediate portion in the front and rear directions of the bottom plate 6. On the other hand, the working device 4 is attached to the front end sides of the left and right vertical plates 7 and 8, and the counterweight 20 described later is attached to the rear end sides of the left and right vertical plates 7 and 8. Yes.

  Here, as shown in FIGS. 7 and 12, a floor plate mounting seat 11A to which a left end side of a floor plate 35 to be described later is attached is fixed to the inner side surface of the left side frame 11 by means of welding or the like. On the upper surface, a floor plate mounting bracket 6A to which the right end side of the floor plate 35 is mounted is fixed using means such as welding. In the present embodiment, the position where the floor plate mounting seat 11 </ b> A and the floor plate mounting bracket 6 </ b> A are provided is a position 5 </ b> A of a utility chamber 29 (accommodating space) described later in the revolving frame 5.

  Reference numeral 13 denotes an engine as a prime mover located on the front side of the counterweight 20 and disposed on the rear side of the swing frame 5. The engine 13 is located on the left and right vertical plates 7 and 8 on the left side of the swing frame 5. It is arranged in a horizontal state extending in the right direction. A cooling fan 13A is attached to the left end side of the engine 13, and a hydraulic pump 14 for supplying pressure oil for operation to various hydraulic actuators mounted on the hydraulic excavator 1 is attached to the right end side of the engine 13. It has been.

  In this case, the hydraulic pump 14 and a heat exchanger 15 to be described later constitute elements provided in association with the engine 13, and the elements such as the hydraulic pump 14 and the heat exchanger 15 together with the engine 13 are a machine room to be described later. 28.

  A heat exchanger 15 is located on the left side of the engine 13 and mounted on the revolving frame 5. The heat exchanger 15 includes a support frame 16, a radiator 17 supported by the support frame 16, and an oil cooler 18. Etc., and is detachably attached to the revolving frame 5.

  Here, the support frame 16 of the heat exchanger 15 includes a front partition plate 16A facing the front partition cover 25 and the utility chamber 29, which will be described later, a rear partition plate 16B provided on the front side of the counterweight 20, The front partition plate 16A and the connection plate 16C for connecting the upper end sides of the rear partition plate 16B are roughly configured. The support frame 16 supports a radiator 17 that cools engine coolant, an oil cooler 18 that cools hydraulic oil, and the like.

  Reference numeral 19 denotes a cab provided on the left side of the front portion of the revolving frame 5, and the cab 19 defines a cab. Reference numeral 20 denotes a counterweight provided on the rear end side of the revolving frame 5, and the counterweight 20 balances the weight with the work device 4. A hydraulic oil tank 21 is provided on the right side of the front portion of the revolving frame 5. The hydraulic oil tank 21 stores hydraulic oil supplied to various hydraulic actuators.

  Next, reference numeral 22 denotes a building cover that is located on the front side of the counterweight 20 and is provided on the revolving frame 5. The building cover 22 includes the engine 13, the hydraulic pump 14, and the heat exchange mounted on the revolving frame 5. It covers the vessel 15 and the like. Here, the building cover 22 includes a top plate 23, a bonnet 24, a support frame 16 of the heat exchanger 15, a front partition cover 25, a left front door 26, a left rear door 27, and the like which will be described later. .

  The upper side of the building cover 22 is partitioned by the top plate 23 and the bonnet 24, the left side of the building cover 22 is partitioned by the left front door 26 and the left rear door 27, and the right side of the building cover 22 is the right side. It is partitioned by a door (not shown). Further, the front side of the building cover 22 is partitioned by the hydraulic oil tank 21 and the front partition cover, and the rear side of the building cover 22 is the rear partition plate 16B and the counterweight 20 constituting the support frame body 16 of the heat exchanger 15. It is configured to be partitioned by.

  Reference numeral 25 denotes a front partition cover provided between the cab 19 and the heat exchanger 15, and the front partition cover 25 constitutes a part of the building cover 22. Here, the front partition cover 25 faces the support frame 16 (front partition plate 16A) of the heat exchanger 15 with a space in the front and rear directions, and partitions the left front side of the building cover 22.

  Reference numeral 26 denotes a left front door which is attached to the front partition cover 25 so as to be openable and closable. The left front door 26 is rotatably supported by the front partition cover 25 via a hinge member. The left front door 26 opens and closes a utility chamber 29 (to be described later) by rotating forward and backward about the position of the front partition cover 25.

  Reference numeral 27 denotes a left rear door provided on the rear side of the left front door 26. The left rear door 27 is connected to the rear partition plate 16B constituting the support frame 16 of the heat exchanger 15 via a hinge member. It is supported movably. The left rear door 27 opens and closes a heat exchanger front chamber 28B, which will be described later, by rotating forward and backward about the position of the rear partition plate 16B.

  A machine room 28 is formed in the building cover 22, and the machine room 28 includes an upper plate 23, a bonnet 24, a left front door 26, a left rear door 27 and a right door (not shown) constituting the building cover 22. ), A counterweight 20, and a hydraulic oil tank 21. The machine room 28 includes an engine room 28A and a heat exchanger front room 28B which are adjacent to each other with the heat exchanger 15 interposed therebetween.

  That is, 28A is an engine room in which the engine 13, the hydraulic pump 14 and the like are accommodated. The engine room 28A includes the top plate 23 of the building cover 22, the bonnet 24, the right door (not shown), and the heat exchanger 15. The support frame 16, the counterweight 20, and the hydraulic oil tank 21 are defined.

  On the other hand, 28B shows a heat exchanger front chamber formed on the opposite side of the engine chamber 28A across the heat exchanger 15. This heat exchanger front chamber 28 </ b> B is defined by the top plate 23 and the left rear door 27 constituting the building cover 22, and the heat exchanger 15, and is configured to be opened and closed by the left rear door 27. ing. In addition, a second electrical device 42 described later is provided in the heat exchanger front chamber 28B.

  Reference numeral 29 denotes a utility room as a storage space formed in the building cover 22 together with the machine room 28, and the utility room 29 supports the top plate 23 and the left front door 26 constituting the building cover 22 and the heat exchanger 15. It is defined by a front partition plate 16A constituting the frame body 16. Here, the lower side of the utility chamber 29 is closed by a floor plate 35 described later, and a first electric device 36 described later is mounted on the floor plate 35.

  Next, reference numeral 30 denotes a turning device mounted on the turning frame 5. The swivel device 30 is positioned between the left and right vertical plates 7 and 8 constituting the swivel frame 5 and is erected at the center of the bottom plate 6. Here, the turning device 30 turns the upper turning body 3 supported on the lower traveling body 2, and is roughly constituted by a hydraulic motor 31, an electric motor 33, which will be described later, and a speed reducer 32. This is a so-called hybrid-type turning device in which the upper turning body 3 is driven to rotate in cooperation with the electric motor 33.

  Reference numeral 33 denotes an AC electric motor as an electric device. The electric motor 33 constitutes a rotation source of the turning device 30 together with the hydraulic motor 31. Here, as shown in FIGS. 4 and 5, the electric motor 33 is attached to the upper end portion of the speed reducer 32 that constitutes the turning device 30, and the speed reducer 32 is vibration-proof with respect to the bottom plate 6 of the turning frame 5. It is directly attached using bolts or the like without interposing a member or the like. A hydraulic motor 31 is attached to the upper end side of the electric motor 33.

  Next, the mounted device assembly 34 according to the present embodiment disposed in the utility chamber 29 will be described.

  That is, 34 indicates a mounted device assembly disposed in the utility chamber 29, and the mounted device assembly 34 includes a floor plate 35, a first electrical device 36, and a vibration isolation mount 38 which will be described later. Is. The mounted device assembly 34 is formed as a single assembly (subassembly) by pre-assembling the floor plate 35 and the first electric device 36 via the vibration-proof mount 38, and the utility device shown in FIG. It is attached to the revolving frame 5 at the position of the chamber 29.

  Reference numeral 35 denotes a floor plate that constitutes a part of the revolving frame 5 and closes the lower side of the utility chamber 29, and the floor plate 35 serves as a base of the mounted device assembly 34. As shown in FIGS. 6 and 7, the floor plate 35 is formed in a rectangular frame shape as a whole, and is detachably attached to the revolving frame 5, and a first electric device 36 to be described later is attached.

  Here, as shown in FIG. 6, the floor plate 35 includes a flat mounting surface portion 35A to which the first electrical device 36 is mounted, and an outer frame portion 35B bent upward from the outer peripheral edge of the mounting surface portion 35A. The mounting surface portion 35A is roughly constituted by a plurality of ribs 35C fixed to the upper surface of the mounting surface portion 35A and the outer frame portion 35B so as to partition the mounting surface portion 35A into a plurality of areas. Further, the mounting surface portion 35A is provided with a work hole 35D for attaching / detaching the floor plate 35 to / from the revolving frame 5, a large-diameter hole 35E used for visual confirmation during work and other related work, and the like. Yes.

  Furthermore, bolt insertion holes 35F are respectively provided at the four corners of the mounting surface portion 35A, and a bolt 35G as a fastening member is inserted into each of the bolt insertion holes 35F. Then, the bolts 35G inserted into the respective bolt insertion holes 35F are screwed to the floor plate mounting seat 11A of the left side frame 11 and the floor plate mounting bracket 6A of the bottom plate 6 shown in FIG. It is configured to be detachable.

  On the other hand, at the central portion of the mounting surface portion 35A, four mount mounting holes 35H are provided at intervals in the front, rear, left, and right directions, and each of the mount mounting holes 35H has a vibration-proof mount 38 to be described later. The bolt 38D is inserted. In addition, in the vicinity of each mount mounting hole 35H, a small square-shaped rotation stop hole 35J is provided, and each rotation stop hole 35J is engaged with a rotation stop projection 38E of an anti-vibration mount 38 to be described later. It is the composition to do. In addition, two suspension bolt mounting holes 35K are formed near the corners of the mounting surface portion 35A at a position sandwiching a first electric device 36 described later.

  Next, reference numeral 36 denotes a first electric device disposed in the utility chamber 29, and the first electric device 36 constitutes a mounted device according to the present embodiment.

  Here, the first electric device 36 as the mounted device is supported in a vibration-proof state on the floor plate 35 via a vibration-proof mount 38 described later, and is connected to the electric motor 33 using a first cable 46 described later. It is what is done. In this case, the first electric device 36 includes a box 37 described later, and an inverter circuit for converting a drive current supplied to the electric motor 33 from a direct current to an alternating current, in the box 37, In addition, electrical components (not shown) such as a chopper circuit for boosting and stepping down are accommodated.

  Reference numeral 37 denotes a box that forms the outer shell of the first electric device 36. The box 37 is formed by, as shown in FIG. 6 and the like, an upper surface 37A and a lower surface 37B that extend in the horizontal direction, and substantially perpendicular to the upper surface 37A. It is formed as a rectangular parallelepiped solid structure surrounded by the front surface 37C, the rear surface 37D, the left side surface 37E, and the right side surface 37F. Here, a cooling water passage (not shown) is provided inside the box body 37, and the heat generated from the electrical components accommodated in the box body 37 is cooled by the cooling water flowing through the cooling water passage. It has become. Further, a connector mounting protrusion 39 (described later) is integrally provided on the upper surface 37 </ b> A of the box body 37.

  Reference numeral 38 denotes a plurality of anti-vibration mounts as anti-vibration members provided between the box body 37 and the floor plate 35 constituting the first electric device 36. Each anti-vibration mount 38 is a first electric device. By supporting 36 in a vibration-proof state with respect to the revolving frame 5, large vibrations of the upper revolving structure 3 are prevented from being transmitted to the first electric device 36.

  Here, as shown in FIGS. 6 to 8, the anti-vibration mount 38 includes a flat device-side attachment portion 38 </ b> A attached to the lower surface 37 </ b> B of the box 37 constituting the first electrical device 36, and the floor plate 35. A disc-shaped floor plate side mounting portion 38B attached to the mounting surface portion 35A, and an elastic body 38C formed using a flexible material such as rubber and provided between the equipment side mounting portion 38A and the floor plate side mounting portion 38B. And a bolt 38D that protrudes from the center portion of the floor plate side mounting portion 38B and is inserted into the mount mounting hole 35H of the floor plate 35.

  Further, a rotation projection 38E as a rotation stop member bent at a right angle from the floor plate side mounting portion 38B along the bolt 38D is provided on the outer peripheral edge portion of the floor plate side mounting portion 38B. The locking projection 38E engages with a locking hole 35J provided in the floor plate 35 when the bolt 38D is inserted into the mount mounting hole 35H of the floor plate 35.

  Then, the device side mounting portion 38A of the vibration isolating mount 38 is attached to the lower surface 37B of the box body 37 using the bolt 38F, and the bolt 38D of the vibration isolating mount 38 is inserted into the mounting mounting hole 35H of the floor plate 35 and tightened with a nut. By mounting the first electric device 37 on the floor plate 35 via the vibration-proof mounts 38, the mounted device assembly 34 is formed. At this time, the rotation stop projection 38E provided on the floor plate side mounting portion 38B of the vibration isolating mount 38 is engaged with the rotation stop hole 35J provided on the floor plate 35. Accordingly, when a nut is fastened to the bolt 38D, a torsional force is prevented from acting on the elastic body 38C to prevent the elastic body 38C from being damaged, and the vibration-proof mount 38 is centered on the bolt 38D by vibration. The structure prevents rotation and prevents the vibration-proof mount 38 from loosening.

  Reference numeral 39 denotes a connector mounting protrusion protruding on the upper surface 37A of the box body 37. The connector mounting protrusion 39 has a rectangular parallelepiped three-dimensional structure having an outer shape whose front and rear length dimensions are smaller than those of the box body 37. It is formed as a body. In other words, the connector mounting protrusion 39 faces the upper surface 37A of the box 37 and extends in the horizontal direction, and the front surface 39B, the rear surface 39C, the left side surface 39D, and the right side surface 39E that are substantially perpendicular to the upper surface 39A. It is formed in a rectangular parallelepiped shape surrounded by. The connector mounting protrusion 39 has an opening on the lower surface side and communicates with the inside of the box 37, and the cable is inserted into the box 37 through this opening.

  Reference numerals 40 and 41 denote first and second device-side connectors provided side by side on the front surface 39 </ b> B of the connector mounting protrusion 39. These first and second device-side connectors 40 and 41 are accommodated in the box body 37. Connected to an electrical component such as an inverter circuit. The first device-side connector 40 is connected to a later-described cable-side connector 46A, and the second device-side connector 41 is connected to a later-described cable-side connector 47A.

  Next, reference numeral 42 denotes a second electric device arranged in the heat exchanger front chamber 28B. The second electric device 42 is connected to the first electric device 36 using a second cable 47 described later. Here, the second electrical device 42 stores a box body 43 and an electrical component (not shown) including a capacitor or a battery or the like in order to store electric energy stored in the box body 43 and driving the electric motor 33. ). The capacitor in the second electric device 42 charges the regenerative energy generated by the electric motor 33 during braking of the electric motor 33 as electric energy, and discharges the electric energy toward the electric motor 33. . The second electric device 42 is configured by connecting a plurality of capacitors.

  On the other hand, as shown in FIG. 5, the box 43 is formed as a rectangular parallelepiped three-dimensional structure extending in the front and rear directions surrounded by the upper surface 43A, the lower surface, the front surface 43B, the rear surface, the left side surface 43C, and the right side surface. The swing frame 5 is supported in a vibration-proof state via a vibration mount (not shown). In addition, a cooling water passage (not shown) is provided inside the box body 43, and heat generated from the electrical components accommodated in the box body 43 is cooled by cooling water flowing through the cooling water passage. ing.

  Reference numeral 44 denotes a connector mounting projection that protrudes on the upper surface 43A of the box body 43. The connector mounting projection 44 is surrounded by the upper surface 44A, the front surface 44B, the rear surface 44C, the left side surface 44D, and the right side surface. It is formed as a rectangular parallelepiped three-dimensional structure having an outer shape with a small length in the front and rear directions. The connector mounting projection 44 has an opening on the lower surface side and communicates with the inside of the box body 43, and a cable is inserted into the box body 43 through the opening.

  Reference numeral 45 denotes a third device-side connector provided on the front surface 44 </ b> B of the connector mounting protrusion 44, and the third device-side connector 45 is connected to an electrical component housed in the box body 43. A cable-side connector 47B described later is connected to the third device-side connector 45.

  Next, reference numeral 46 denotes a first cable that electrically connects the electric motor 33 and the first electric device 36. A cable-side connector 46A having a connection terminal (not shown) disposed therein is provided at the end of the first cable 46 on the first electrical device 36 side. The cable-side connector 46 </ b> A of the first cable 46 is configured to be connected to the first device-side connector 40 attached to the connector attachment protrusion 39 of the first electric device 36. In this case, the cable-side connector 46 </ b> A and the first cable 46 in the vicinity of the cable-side connector 46 </ b> A are housed in the upper surface 37 </ b> A of the box 37 constituting the first electrical device 36 as viewed from above.

  Reference numeral 47 denotes a second cable that electrically connects the first electric device 36 and the second electric device 42. At both ends of the second cable 47, cable-side connectors 47A and 47B having connection terminals (not shown) disposed therein are provided. The cable-side connector 47A on one end side is connected to the second device-side connector 41 attached to the connector attachment projection 39 of the first electric device 36, and the cable-side connector 47B on the other end side is connected to the second device-side connector 41B. It is configured to be connected to a third device-side connector 45 attached to the connector attachment protrusion 44 of the electrical device 42. In this case, the cable side connector 47A and the portion of the second cable 47 in the vicinity of the cable side connector 47A are accommodated in the upper surface 37A of the box 37 constituting the first electric device 36 when viewed from above, and the cable side connector 47B and a portion of the second cable 47 in the vicinity of the cable-side connector 47B are accommodated in an upper surface 43A of the box body 43 constituting the second electric device 42 as viewed from above.

  Therefore, as shown in FIG. 9, the electric motor 33 and the first electric device 36 are electrically connected via the first cable 46, and the first electric device 36 and the second electric device 42 are connected. Are electrically connected via a second cable 47. Thus, when the swivel device 30 is operated, the electric energy discharged from the second electric device 42 is supplied to the electric motor 33 as an alternating current through the first electric device 36, and the electric motor 33 is driven to rotate. To do. On the other hand, when the swing device 30 is braked, the regenerative energy generated by the inertial rotation of the electric motor 33 is stored in the second electric device 42.

  Reference numerals 48 and 49 denote two mounting seats provided on the box body 37 of the first electric device 36. The mounting seats 48 and 49 fix first and second clamp members 50 and 51, which will be described later. To do. Here, each mounting seat 48 and 49 is comprised, for example with a hexagon nut, and is being fixed on the upper surface 37A which comprises the box 37 using means, such as welding.

  Reference numeral 50 denotes a first clamp member provided in the box 37 of the first electrical device 36 located in the vicinity of the connector mounting protrusion 39. Here, the first clamp member 50 is provided on the upper surface 37A of the box body 37 in a state where the vicinity of the cable side connector 46A of the first cable 46, for example, the end portion where the cable side connector 46A is provided is clamped. The mounting seat 48 is fastened with bolts 50A.

  In this way, the cable side connector 46A is connected to the connector mounting protrusion 39 provided on the box 37 of the first electric device 36, and the end of the first cable 46 is further connected to the first electric device 36. The box 37 is fixed. Thereby, the vibration transmitted to the end portion of the first cable 46 and the vibration transmitted to the cable side connector 46A are matched, and an excessive external force is prevented from being transmitted to the connection terminal of the cable side connector 46A. Yes.

  Reference numeral 51 denotes a second clamp member provided in the box 37 of the first electric device 36 located in the vicinity of the connector mounting protrusion 39, and the second clamp member 51 is a cable of the second cable 47. A portion near the side connector 47A, for example, one end provided with the cable side connector 47A is clamped, and is fastened to a mounting seat 49 provided on the upper surface 37A of the box body 37 using a bolt 51A.

  Reference numeral 52 denotes a third clamp member provided in the box 43 of the second electric device 42 located in the vicinity of the connector mounting protrusion 44, and the third clamp member 52 is a cable of the second cable 47. A portion near the side connector 47B, for example, the other end provided with the cable side connector 47B is clamped, and is fastened to the upper surface 43A of the box 43 using bolts 52A.

  As described above, the cable-side connector 47A is connected to the connector mounting protrusion 39 provided on the box 37 of the first electric device 36, and one end of the second cable 47 is further connected to the first electric device 36. The box 37 is fixed. As a result, the vibration generated in the second cable 47 and the vibration transmitted to one end of the second cable 47 can be matched with the vibration transmitted to the cable-side connector 47A. On the other hand, after connecting the cable-side connector 47B to the connector mounting protrusion 44 provided on the box 43 of the second electric device 42, the other end of the second cable 47 is connected to the second electric device 42. Fix to the box 43. Thereby, the vibration generated in the second cable 47 and the vibration transmitted to the other end of the second cable 47 can be matched with the vibration transmitted to the cable-side connector 47B. Accordingly, even when the vibration transmitted to the first electrical device 36 and the vibration transmitted to the second electrical device 42 are different during machine operation, excessive external force is applied to the connection terminal of the cable side connector 47A and the connection terminal of the cable side connector 47B. It has a configuration that can suppress transmission.

  Reference numeral 53 denotes a cover attached to the box 43 of the second electric device 42. The cover 53 is formed of a plate body bent into an L-shaped cross section, and is fixed to the box body 43 and the connector mounting projection 44 constituting the second electric device 42 using a plurality of bolts 53A. The cover 53 covers the third device-side connector 45 attached to the connector attachment protrusion 44 and the cable-side connector 47B of the second cable 47 connected to the third device-side connector 45. .

  Thereby, when performing maintenance and inspection work on the heat exchanger 15, it is possible that an operator carelessly steps on the third device side connector 45 or the cable side connector 47B of the second cable 47. The cover 53 can be blocked.

  Reference numeral 54 denotes two suspension bolts as rope stoppers attached to the attachment surface portion 35A of the floor board 35. As shown in FIG. By being tightened with nuts in this state, they are fixed at two locations sandwiching the first electrical device 36 mounted on the floor plate 35. Here, each suspension bolt 54 is provided with a rope 55 for hanging work being hooked. By lifting the rope 55 with a crane 56, the floor plate 35, the first electric device 36, and the anti-vibration mount 38 are provided. It is the structure which can lift the mounting apparatus assembly 34 with which 1 was integrated. The suspension bolts 54 may be provided at three or more locations according to the weight balance of the mounted device assembly 34.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2, and the upper revolving body 3 is swung by the swiveling device 30 while working. Sediment excavation work is performed using the device 4.

  In this case, the swing frame 5 vibrates greatly when the hydraulic excavator 1 is operated. However, the first electric device 36 disposed in the utility chamber 29 is attached to the floor plate 35 fixed to the swing frame 5 via the vibration isolation mount 38. Installed. Thereby, the vibration transmitted to the first electrical device 36 can be reduced by the anti-vibration mount 38, and the electrical components accommodated in the box 37 of the first electrical device 36 can be protected.

  Here, in the present embodiment, a floor plate 35 that constitutes a part of the swivel frame 5 and closes the lower side of the utility chamber 29, a first electric device 36 that requires anti-vibration measures, an anti-vibration mount 38, By pre-assembling the mounting device assembly 34, the workability when placing the first electric device 36 in the utility chamber 29 can be improved.

  Therefore, an assembly process for assembling the mounted device assembly 34 and assembling it to the revolving frame 5 will be described with reference to FIGS. 10 to 13.

  First, FIG. 10 shows an anti-vibration mount attachment process. In this anti-vibration mount attachment process, four anti-vibration mounts (only two are shown) are provided on the lower surface 37B of the box 37 constituting the first electric device 36. 38 is installed. In this case, the bolt 38F is inserted into the device side mounting portion 38A of the vibration isolating mount 38, and the bolt 38F is screwed into the lower surface 37B of the box body 37, so that the floor plate side mounting portion 38B protrudes downward. A swing mount 38 can be attached.

  Next, FIG. 11 shows a floor plate mounting step. In this floor plate mounting step, the bolts 38D of the anti-vibration mounts 38 mounted on the box body 37 are inserted into the mount mounting holes 35H of the floor plate 35 and tightened with nuts. As a result, the floor plate 35 is attached to the floor plate-side mounting portion 38B of each anti-vibration mount 38. Accordingly, the first electric device 36 can be attached to the attachment surface portion 35A of the floor plate 35 via the four anti-vibration mounts 38 in an anti-vibration state, and the bottom plate 35, the first electric device 36, and the anti-vibration mount An on-board assembly 34 consisting of 38 can be formed.

  At this time, as shown in FIG. 8, the rotation projection 38 </ b> E provided on the floor plate side mounting portion 38 </ b> B of the vibration isolation mount 38 engages with the rotation stop hole 35 </ b> J provided on the floor plate 35. Accordingly, when a nut is fastened to the bolt 38D, a torsional force is prevented from acting on the elastic body 38C to prevent the elastic body 38C from being damaged, and the vibration-proof mount 38 is centered on the bolt 38D by vibration. Rotation can be prevented and the vibration-proof mount 38 can be prevented from loosening.

  Next, FIG. 12 shows an assembly lifting process, and in this assembly lifting process, the mounted equipment assembly 34 is lifted using the rope 55 and the crane 56. In this case, two suspension bolts 54 are fixed to the upper surface side of the mounting surface portion 35A of the floor board 35 at a position sandwiching the first electric device 36 from the left and right directions. Then, a hanging load rope 55 is hooked on each suspension bolt 54, and the rope 55 is lifted by a crane 56, thereby lifting the mounted device assembly 34. Further, the suspended mounting device assembly 34 is transported to the position 5A of the utility chamber 29 in the revolving frame 5, that is, above the position including the floor plate mounting seat 11A of the left side frame 11 and the floor plate mounting bracket 6A of the bottom plate 6. .

  Next, FIG. 13 shows an assembly attachment process. In this assembly attachment process, first, the floor plate 35 of the mounting device assembly 34 lifted by the rope 55 and the crane 56 is attached to the floor plate attachment seat 11 </ b> A of the left side frame 11. It is placed on the floor plate mounting bracket 6 </ b> A of the bottom plate 6. In this state, a bolt 35G is inserted into each bolt insertion hole 35F provided in the floor plate 35, and the bolt 35G is screwed into the floor plate mounting seat 11A of the left side frame 11 and the floor plate mounting bracket 6A of the bottom plate 6. Thereby, the floor board 35 is fixed to the revolving frame 5, and the mounted device assembly 34 can be attached to the revolving frame 5 at the position 5 </ b> A of the utility chamber 29.

  This assembly attaching step is performed before the upper surface cover for closing the upper surface of the utility chamber 29 is attached, or the upper surface cover is removed in advance before the execution of this step.

  Thus, according to the present embodiment, the first electrical device 36 is attached to the floor plate 35 that is configured to be detachable from the revolving frame 5 through the anti-vibration mount 38, so that the constituent members of the revolving frame 5 are originally provided. The mounted device assembly 34 can be formed using the floor plate 35. For this reason, it is not necessary to use a stand or the like made of a member different from the revolving frame 5, and after forming the mounted device assembly 34, the floor plate 35 serving as the base of the mounted device assembly 34 is used as a utility in the revolving frame 5. The first electric device 36 can be disposed in the utility chamber 29 in a vibration-proof state quickly and easily by simply attaching it to the position 5A of the chamber 29.

  In this case, the mounting device assembly 34 is formed by attaching the first electric device 36 to the floor plate 35 that is originally a constituent member of the revolving frame 5, thereby reducing the mounting device assembly 34 as much as possible. Can do. As a result, when the mounted device assembly 34 is attached to and removed from the revolving frame 5 at the position 5A of the utility chamber 29, a large work space can be secured around the mounted device assembly 34, and the mounted device assembly The workability when attaching and removing the solid body 34 can be improved.

  In addition, by attaching the first electric device 36 to the floor plate 35 that is a constituent member of the swivel frame 5, the components of the mounted device assembly 34 are compared with the case where a stand or the like made of a member different from the swivel frame 5 is used. Since the number of points can be reduced, the assembly workability of the mounted device assembly 34 can be improved, and the manufacturing cost of the mounted device assembly 34 can be reduced.

  Further, when the mounting device assembly 34 is attached to the revolving frame 5, the floor plate 35 of the mounting device assembly 34 is once placed on the floor plate mounting seat 11A of the left side frame 11 and the floor plate mounting bracket 6A of the bottom plate 6; The floor board 35 can be attached to the floor board mounting seat 11A and the floor board mounting bracket 6A using bolts 35G. For this reason, the mounting equipment assembly 34 can be attached to and removed from the revolving frame 5 from above and below with the rope 55 being used to lift the mounting equipment assembly 34, thereby further improving the workability. be able to.

  Further, when the bolt 38D projecting from the floor plate side mounting portion 38B of the vibration isolating mount 38 is inserted into the mount mounting hole 35H of the floor plate 35 and tightened with a nut, the rotation projection 38E provided on the floor plate side mounting portion 38B is provided. Can be prevented from rotating with respect to the floor plate 35 by engaging the rotation stop hole 35J of the floor plate 35. For this reason, it is possible to prevent the torsional force from acting on the elastic body 38C and prevent the elastic body 38C from being damaged. Further, even if the swing frame 5 vibrates during the operation of the hydraulic excavator 1, it is possible to prevent the mounting portion between the vibration isolating mount 38 and the floor plate 35 from being loosened, and for a long time with respect to the floor plate 35 fixed to the swing frame 5. The first electrical device 36 can be supported in a stable vibration-proof state.

  In the above-described embodiment, the first electric device 36 is exemplified as the mounted device attached to the floor plate 35 of the utility room 29. However, the present invention is not limited to this, and a configuration in which, for example, a hydraulic device such as a control valve may be attached.

  In the embodiment described above, the electric motor 33 used in the hybrid turning device 30 is described as an example of the electric device mounted on the vehicle body. However, the present invention is not limited to this, and can be applied to, for example, an electric hydraulic pump as a prime mover, or an electric motor for a hydraulic pump used in combination with the engine 13 as a hybrid prime mover.

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
5 Rotating frame 5A Utility room (accommodating space) position 13 Engine (motor)
14 Hydraulic pump (element)
15 Heat exchanger (element)
19 Cab 22 Building cover 28 Machine room 29 Utility room (accommodating space)
30 Rotating device 33 Electric motor (electric device)
34 Mounted device assembly 35 Floor board 36 First electrical device (mounted device)
38 Anti-vibration mount 38A Equipment side mounting part 38B Floor board side mounting part 38C Elastic body 38D Bolt 38E Non-rotating protrusion (rotating member)
54 Hanging bolt 55 Rope

Claims (6)

A frame that constitutes a support structure of the vehicle body, a cab that is provided on the front side of the frame and that defines a driver's cab, and a prime mover that is provided on the rear side of the frame and is necessary for driving the vehicle body, and a building A machine room covered by a cover,
A storage space that is provided in the building cover together with the machine room and is blocked by a floorboard, and can store equipment or fixtures;
In the construction machine constituted by the mounted equipment mounted on the floor board in this accommodating space,
The floor plate of the housing space is configured to be detachable from the frame,
A single mounting device assembly is formed by pre-assembling the floor plate and the mounting device via a vibration isolation member,
A construction machine characterized in that the floor board forming the mounted equipment assembly is attached to the frame at a position of the accommodation space.   The construction machine according to claim 1, wherein the housing space is a utility room that is provided at a rear portion of the cab and is covered by a door cover that can be opened and closed at a side portion and is closed by the floor plate. The vibration-proof member includes a device-side attachment portion attached to the mounted device, a floor-plate-side attachment portion attached to the floorboard, and an elastic body provided between the device-side attachment portion and the floorboard-side attachment portion, It is constituted by a bolt that is provided in the floor plate side mounting portion and is inserted into the floor plate,
Attaching the device side mounting portion of the vibration isolation member to the lower surface of the mounting device, and forming the mounting device assembly by fastening the bolt of the vibration isolation member to the floor plate,
The construction machine according to claim 1 or 2, wherein the floor plate of the mounted equipment assembly is configured to be attached to the frame using a fastening member in a state of being placed on the frame.   4. The structure according to claim 3, wherein the floor plate side mounting portion of the vibration isolation member is provided with a rotation stop member that prevents the vibration isolation member from rotating relative to the floor plate by engaging with the floor plate. 5. Construction machinery.   The construction machine according to any one of claims 1 to 4, wherein a rope hook for hooking a rope for lifting the mounted device assembly is attached to the floor plate of the mounted device assembly.   The construction machine according to claim 1, wherein an electric device is mounted on the frame, and the mounted device is configured by an electric device connected to the electric device via a cable.

Images