JP6656979B2 - Work machines and series of work machines - Google Patents

Description

  The present invention relates to a hybrid working machine and a series of working machines.

  2. Description of the Related Art Conventionally, a hybrid working machine including an electric motor (assist motor) for assisting an engine, which is a driving force source of a hydraulic pump, and an electric motor (slewing motor) for swiveling a revolving body, is known (for example, Patent Document 1). 1 etc.).

  Patent Literature 1 discloses a working machine (hereinafter, referred to as a “rif mag machine”) including a lifting magnet (hereinafter, referred to as a “rif mag machine”). Specifically, a power storage device (capacitor), a converter, a first drive component (inverter) for driving the electric motor, and a second drive component (inverter) for driving the rif mag are integrated into a single module, and Located in the department.

JP 2011-21432A

  However, in the configuration of Patent Document 1, the converter, the first and second drive components, and the like are integrally mounted as a module. For this reason, the arrangement structure cannot be used for a working machine other than a reflex mag machine such as a hybrid shovel, and the cost of parts and the like may increase.

  Further, in the configuration of Patent Document 1, a module in which a converter, first and second drive components, and the like are stacked is mounted on a power storage device arranged on a revolving frame of a revolving body. For this reason, the vertical dimension and the vertical dimension of the portion occupied by the power storage device and the module become extremely large, and the vertical dimension of the elevating step provided to cover the power storage device and the module and the like becomes short, such that the vertical direction to the upper part of the house is reduced. May be difficult to remove.

  Therefore, in view of the above problem, the arrangement structure at the right front portion of the revolving unit can be shared between the reflex mag machine and another work machine such as a shovel, and the operator can easily go up and down to the upper part of the house. It is an object to provide a working machine and a series of working machines.

To achieve the above object, in one embodiment,
Revolving structure,
Electric motor,
A power storage device mounted on the right front portion of the revolving superstructure,
An inverter mounted on a right front portion of the revolving structure in a state housed in the first housing and arranged on a power path between the power storage device and the electric motor;
A converter mounted on a right front portion of the revolving structure in a state housed in a second housing different from the first housing, and disposed on a power path between the power storage device and the inverter;
A fixing plate fixed to a revolving frame at a front right portion of the revolving structure and including a first fixing portion to which the first housing is fixed, and a second fixing portion to which the second housing is fixed; A support member;
An elevating step provided at a right front portion of the revolving body in a manner to cover the power storage device, the first housing, the second housing, and the support member;
On the fixing plate, the first housing and the second housing are arranged side by side, and a third housing different from the first housing and the second housing is further arranged and fixed. A fixing part is provided,
A work machine is provided.

Also, a series of working machines having a shovel and a rif mag machine,
The shovel and the rif mag machine are:
An electric motor, a power storage device mounted on a right front portion of the revolving structure, and a power storage device mounted on the right front portion of the revolving structure housed in the first housing, on a power path between the power storage device and the motor. And a second housing different from the first housing and mounted on a right front portion of the revolving structure, and disposed on a power path between the power storage device and the inverter. Converter, a first fixed portion fixed to the revolving frame at the right front portion of the revolving structure, and the first case is fixed, and a second fixed portion to which the second case is fixed. A supporting member having a fixed plate, and an elevating step provided on the right front portion of the revolving structure in a manner to cover the power storage device, the first housing, the second housing, and the supporting member are commonly used. Prepared,
The first casing and the second casing are arranged side by side on the fixing plate in common with the shovel and the rif mag machine, and a third casing different from the first casing and the second casing. A third fixing portion that can further arrange and fix the housing is provided,
In the lift mag machine, a lift mag driver provided in a power path between the power storage device and a lifting magnet is housed in the third housing and fixed to the third fixing portion.
A series of work machines is provided.

  According to the above-described embodiment, the arrangement structure at the right front portion of the revolving superstructure can be shared between the lift mag machine and another work machine such as the shovel, and the operator can easily move up and down to the upper part of the house. Working machines and a series of working machines can be provided.

It is a side view of a shovel. It is a figure showing an example of composition of a drive system of a shovel. It is a figure showing an example of composition of an electric storage system of a shovel. It is a side view of a rif mag machine. It is a figure showing an example of composition of a drive system of a rif mag machine. It is a figure showing an example of composition of a rif mag driver. FIG. 2 is a diagram illustrating a configuration of an exhaust gas treatment device mounted on a work machine according to the present embodiment. It is a top view showing an example of arrangement structure of various parts in an upper revolving super structure of a work machine concerning this embodiment. It is a right view which shows an example of the arrangement | positioning structure of various components in the right front part of the upper revolving structure of the work machine which concerns on this embodiment. It is a front view showing an example of arrangement structure of various parts in the right front part of the upper revolving super structure of the work machine concerning this embodiment. It is a perspective view showing the right front part of the upper revolving super structure of the work machine concerning this embodiment. It is a front view showing the right front part of the upper revolving super structure of the work machine concerning this embodiment. It is sectional drawing which shows an example of the fixing structure of an electric drive component. It is a perspective view which shows an example of the support member which fixes an inverter, a step-up / down converter, a rif mag driver, and a work light. It is a figure showing an example of a cooling system of an electric drive part.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

  First, a basic configuration of a shovel will be described as an example of a hybrid type working machine according to the present embodiment with reference to FIGS. 1 to 3.

  FIG. 1 is a side view showing a shovel which is an example of a working machine according to the present embodiment.

  As shown in FIG. 1, an upper swing body 3 is mounted on a lower traveling body 1 of a shovel via a swing mechanism 2. A boom 4 is attached to the upper swing body 3. An arm 5 is attached to the tip of the boom 4, and a bucket 6 is attached to the tip of the arm 5. The boom 4, the arm 5, and the bucket 6 as attachments are each hydraulically driven by a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9 as hydraulic actuators. The upper revolving unit 3 is provided with a cabin 10 on which an operator is mounted, and a diesel engine 11 (see FIG. 2) serving as a power source.

  FIG. 2 is a block diagram illustrating a configuration of a drive system of the shovel, which is an example of the work machine according to the present embodiment. In the figure, the mechanical power system is indicated by a double line, the high-pressure hydraulic line is indicated by a thick solid line, the pilot line is indicated by a broken line, and the electric drive / control system is indicated by a thin solid line.

  In the shovel according to the present embodiment, a diesel engine 11 as a main drive unit and a motor generator 12 as an assist drive unit are connected to two input shafts of a speed reducer 13, respectively. A main pump 14 and a pilot pump 15 are connected to an output shaft of the speed reducer 13. That is, the diesel engine 11 drives the main pump 14 and the pilot pump 15 via the speed reducer 13, and the motor generator 12 assists the diesel engine 11 via the speed reducer 13, and the main pump 14 and the pilot pump 15 is driven. The motor generator 12 is connected via an inverter 18A to a power storage system 120 including a capacitor 19 (see FIG. 3) as an example of a power storage device.

  The main pump 14 is connected to a control valve 17 via a high-pressure hydraulic line 16. The main pump 14 is, for example, a variable displacement hydraulic pump. By controlling the angle (tilt angle) of the swash plate, the stroke length of the piston can be adjusted, and the discharge flow rate can be controlled.

  The pilot pump 15 is, for example, a fixed displacement hydraulic pump. The pilot pump 15 is connected to an operation device 26 via a pilot line 25.

  The control valve 17 is a control device that controls the hydraulic system in accordance with an operation on the operation device 26 (a secondary pilot pressure input via the hydraulic line 27). The hydraulic motors 1A (for right) and 1B (for left) that drive the undercarriage 1, the boom cylinder 7, the arm cylinder 8, and the bucket cylinder 9 are connected to a control valve 17 via a high-pressure hydraulic line.

  The operation device 26 includes levers 26A and 26B and a pedal 26C. The levers 26A and 26B and the pedal 26C are connected to the control valve 17 and the pressure sensor 29 via a hydraulic line 27 and a hydraulic line 28, respectively. The pressure sensor 29 is connected to the controller 30.

  In the shovel according to the present embodiment, the turning mechanism 2 is electrified, and a turning electric motor 21 that drives the turning mechanism 2 is provided. Turning electric motor 21 is connected to power storage system 120 via inverter 18B. A resolver 22, a mechanical brake 23, and a turning speed reducer 24 are connected to a rotating shaft 21A of the turning electric motor 21.

  In the present embodiment, the inverters 18A and 18B are housed in the same housing (hereinafter referred to as “inverter housing”) 18H (see FIG. 8 and the like). Hereinafter, a component in which the inverters 18A and 18B are integrated is referred to as an inverter 18.

  The controller 30 is a main control device that performs drive control of the shovel according to the present embodiment. The controller 30 is configured by, for example, an arithmetic processing unit including a CPU and a ROM, and various drive controls are realized by executing a drive control program stored in the ROM on the CPU.

  The controller 30 converts a signal supplied from the pressure sensor 29 (a pilot pressure corresponding to the turning operation of the upper turning body 3 in the operating device 26) into a speed command, and controls the driving of the turning electric motor 21.

  In addition, the controller 30 controls the operation of the motor generator 12 (switching between electric operation (assist operation) and power generation operation), and also controls the drive of the buck-boost converter 100 (see FIG. 3) by the capacitor 19 (FIG. 3). (See Reference). The controller 30 controls the step-up / step-down converter based on the state of charge of the capacitor 19, the operation state of the motor generator 12 (electric operation (assist operation) or power generation operation), and the operation state of the turning motor 21 (powering operation or regenerative operation). By controlling the switching between the step-up operation and the step-down operation of 100, the charge / discharge control of the capacitor 19 is performed.

  FIG. 3 is a circuit diagram illustrating an example of a configuration of a power storage system 120 of the shovel, which is an example of the work machine according to the present embodiment. Power storage system 120 includes capacitor 19, step-up / step-down converter 100, DC bus 110, and the like. The DC bus 110 controls transfer of electric power among the capacitor 19, the motor generator 12, and the turning motor 21. The capacitor 19 is provided with a capacitor voltage detecting unit 112 for detecting a voltage value and a current value of the capacitor 19, and a capacitor current detecting unit 113. The capacitor voltage value and the capacitor current value detected by the capacitor voltage detection unit 112 and the capacitor current detection unit 113 are supplied to the controller 30.

  The step-up / step-down converter 100 switches between a step-up operation and a step-down operation so that the DC bus voltage value falls within a certain range according to the operation states of the motor generator 12 and the turning motor 21. The DC bus 110 is provided between the inverters 18A and 18B and the step-up / step-down converter 100, and the capacitor 19, the motor generator 12, and the turning motor 21 exchange power via the DC bus 110.

  The switching control between the step-up operation and the step-down operation of the buck-boost converter 100 is performed by the DC bus voltage value detected by the DC bus voltage detection unit 111, the capacitor voltage value detected by the capacitor voltage detection unit 112, and the capacitor current detection unit 113. This is performed based on the detected capacitor current value.

  Next, with reference to FIGS. 4 to 6, a basic configuration of a rif mag machine will be described as another example of the hybrid type working machine according to the present embodiment. Hereinafter, the same components as those of the above-described shovel are denoted by the same reference numerals, and different portions will be mainly described.

  The configuration of the power storage system 120 of the rif mag machine is shown in FIG. 3, similarly to the above-described shovel.

  FIG. 4 is a side view showing a rif mag machine as another example of the work machine according to the present embodiment.

  As shown in FIG. 4, in the rif mag machine according to the present embodiment, a lifting magnet 6A (hereinafter, referred to as “riff mag”) is attached to the tip of the arm 5 instead of the above-described shovel bucket 6.

  FIG. 5 is a block diagram illustrating a configuration of a drive system of a reflex mag machine, which is another example of the work machine according to the present embodiment. 2, the mechanical power system is indicated by a double line, the high-pressure hydraulic line is indicated by a thick solid line, the pilot line is indicated by a broken line, and the electric drive / control system is indicated by a thin solid line.

  The rif mag driver 48 is disposed in a power path between the inverter 18A for driving and controlling the power storage system 120 and the motor generator 12, and the rif mag 6A, and excites the electromagnetic coil 6M (see FIG. 6) included in the rif mag 6A. Drive circuit. The rif mag driver 48 has a configuration capable of switching the polarity and applying the voltage Vdc of the DC bus 110 to the rif mag 6A. With such a configuration, the rif mag driver 48 attracts and releases the rif mag 6A (that is, excites and excites the electromagnetic coil 6M. Demagnetization) can be switched. Hereinafter, the configuration of the lift mag driver 48 will be described with reference to FIG.

  FIG. 6 is a diagram showing an example of the configuration of the rif mag driver 48. The rif mag driver 48 is configured by a known H-bridge circuit including switching elements 48Ta to 48Td and commutation diodes 48Da to 48Dd. Specifically, each of the switching elements 48Ta and 48Tb and each of the switching elements 48Tc and 48Td are connected in series, and the serially connected switching elements 48Ta and 48Tb and the switching elements 48Tc and 48Td are connected in parallel. The terminals MP and MN of the electromagnetic coil 6M of the rif mag 6A are connected to intermediate points between the switching elements 48Ta and 48Tb and the switching elements 48Tc and 48Td connected in series, respectively. Also, commutation diodes 48Da to 48Dd are connected in parallel to the switching elements 48Ta to 48Td, respectively.

  When the electromagnetic coil 6M of the rifmag 6A is excited (when the suction switch 42 is turned on), the switching elements 48Ta and 48Td are turned on, and the switching elements 48Tb and 38Tc are turned off. Thus, the voltage Vdc of the DC bus 110 is applied to the electromagnetic coil 6M of the rif mag 6A via the switching elements 48Ta and 48Td, and an exciting current flows from the terminal MP of the electromagnetic coil 6M to the terminal MN. Therefore, the electromagnetic coil 6M is excited, and the rif mag 6A can adsorb a steel material or the like.

  On the other hand, when demagnetizing the electromagnetic coil 6M of the rif mag 6A (that is, when the release switch 44 is turned on), the switching elements 48Tb and 48Tc are turned on, and the switching elements 48Ta and 48Td are turned off. As a result, the voltage Vdc of the DC bus 110 is applied in the reverse direction to the electromagnetic coil 6M of the rif mag 6A, and from the electromagnetic coil 6M to the electromagnetic coil 6M via the commutation diode 48Dc, the DC bus 110, and the commutation diode 48Db. Return degaussing current flows. Therefore, the electromagnetic coil 6M of the rif mag 6A is demagnetized, and the steel material or the like adsorbed on the rif mag 6A can be released. At this time, the inverter 18A supplies the motor generator 12 with regenerative electric power released from the electromagnetic coil 6M to the DC bus 110 as a demagnetizing current.

  The controller 30 outputs a control command to the rif mag driver 48 in accordance with the operation input from the suction switch 42 and the release switch 44, and controls the driving of the rif mag 6A (specifically, the electromagnetic coil 6M). That is, when the suction switch 42 is turned on, the controller 30 outputs a control command to turn on the switching elements 48Ta and 48Td and to turn off the switching elements 48Tb and 48Tc to the lift mag driver 48. At this time, the controller 30 can adjust the voltage applied to the electromagnetic coil 6M by performing PWM (Pulse Width Modulation) control on the switching elements 48Ta and 48Td. Further, when the suction switch 42 is turned on, the controller 30 outputs a control command to turn on the switching elements 48Tb and 48Tc and to turn off the switching elements 48Ta and 48Td to the lift mag driver. At this time, the controller 30 can adjust the voltage applied to the electromagnetic coil 6M by performing PWM control on the switching elements 48Tb and 48Tc.

  In the following description, the inverter 18 (the inverters 18A and 18B), the step-up / step-down converter 100, the rif mag driver 48, and the capacitor 19 may be collectively or individually referred to as "electrically driven components".

  As described above, a series of work machines including a shovel, which is an example of the work machine according to the embodiment, and a riff mag machine, which is another example (hereinafter, referred to as a work machine series), are common to each work machine as described above. It has a configuration and a configuration unique to each work machine. Hereinafter, the description will be given focusing on the configuration common to each work machine included in the work machine series including the shovel and the rif mag machine.

  Next, a configuration of an exhaust gas processing device 150 that purifies exhaust gas discharged from the diesel engine 11 will be described with reference to FIG.

  FIG. 7 is a diagram illustrating a configuration example of the exhaust gas processing device 150. In the present embodiment, the exhaust gas processing device 150 purifies exhaust gas discharged from the diesel engine 11. The diesel engine 11 is controlled by an engine control module (hereinafter, referred to as “ECM”) 60.

  Exhaust gas discharged from the diesel engine 11 flows through a turbocharger 61 to an exhaust pipe 62. Then, the exhaust gas flows into the exhaust gas processing device 150 from the exhaust pipe 62, and is purified by the exhaust gas processing device 150 and then discharged to the atmosphere.

  On the other hand, the intake air introduced into the intake pipe 64 through the air cleaner 63 passes through the turbocharger 61 and the intercooler 65 and is supplied to the diesel engine 11.

  The exhaust pipe 62 is provided with a first exhaust processing section and a second exhaust processing section in series. The first exhaust processing unit in the present embodiment is a diesel particulate filter (DPF) 66 that collects particulate matter in exhaust gas. The second exhaust processing section is a selective reduction catalyst 67 for reducing and removing NOx in exhaust gas.

  The first exhaust processing unit may be a diesel oxidation catalyst (DOC: Diesel Oxidation Catalyst).

  The selective reduction catalyst 67 removes NOx by receiving the supply of the liquid reducing agent and continuously reducing NOx in the exhaust gas. In the present embodiment, urea water is used as the liquid reducing agent from the viewpoint of handleability.

  As a matter of course, any other treating agent other than urea water may be used as long as the treating agent can continuously reduce NOx.

  A urea water injection valve 68 for supplying urea water to the selective reduction catalyst 67 is provided upstream of the selective reduction catalyst 67 in the exhaust pipe 62. The urea water injection valve 68 is connected to a urea water tank 200 via a urea water supply pipe 69 (hereinafter, simply referred to as “pipe 69”).

  A urea water supply pump 70 is provided in the pipe 69. A filter 71 is provided between the urea water tank 200 and the urea water supply pump 70. The urea water stored in the urea water tank 200 is supplied to the urea water injection valve 68 by the urea water supply pump 70. The urea water is injected from the urea water injection valve 68 into the exhaust pipe 62 at a position upstream of the selective reduction catalyst 67 in the exhaust pipe 62.

  The urea water injected from the urea water injection valve 68 is supplied to the selective reduction catalyst 67. The supplied urea water is hydrolyzed in the selective reduction catalyst 67 to generate ammonia. The generated ammonia reduces NOx contained in the exhaust gas in the selective reduction catalyst 67. As a result, the exhaust gas discharged from the diesel engine 11 is purified.

  The first NOx sensor 72 is disposed upstream of the urea water injection valve 68. The second NOx sensor 73 is disposed downstream of the selective reduction catalyst 67. The first NOx sensor 72 and the second NOx sensor 73 detect the concentration of NOx contained in the exhaust gas at the respective positions.

  The urea water tank 200 is provided with a urea water remaining amount sensor 74. The urea water remaining amount sensor 74 detects the remaining amount of urea water in the urea water tank 200.

  The first NOx sensor 72, the second NOx sensor 73, the urea water remaining amount sensor 74, the urea water injection valve 68, and the urea water supply pump 70 are connected to an exhaust gas controller 75. The exhaust gas controller 75 controls the injection amount such that an appropriate amount of urea water is injected by the urea water injection valve 68 and the urea water supply pump 70 based on the NOx concentration detected by each of the first NOx sensor 72 and the second NOx sensor 73. Perform control.

  The exhaust gas controller 75 calculates the ratio of the remaining amount of urea water to the total volume of the urea water tank 200 based on the remaining amount of urea water output from the urea water remaining amount sensor 74. In the present embodiment, the ratio of the remaining amount of urea water to the total volume of the urea water tank 200 is defined as a remaining urea water ratio. For example, a urea water remaining amount ratio of 50% indicates that urea water of half the capacity of the urea water tank 200 remains in the urea water tank 200.

  The exhaust gas controller 75 is communicably connected to the ECM 60 that controls the diesel engine 11 via communication means (for example, a LAN that conforms to the CAN protocol). Further, the ECM 60 is connected to the shovel controller 76 via communication means (for example, a LAN conforming to the CAN protocol).

  The shovel controller 76 can share various information of the exhaust gas processing device 150 included in the exhaust gas controller 75. Each of the ECM 60, the exhaust gas controller 75, and the shovel controller 76 includes a CPU, a RAM, a ROM, an input / output port, a storage device, and the like.

  A monitor 77 (display device) is connected to the shovel controller 76. The monitor 77 displays information and data such as warnings and operating conditions.

  The exhaust gas treatment device 150 has a freezing prevention mechanism for preventing the urea water tank 200 and the pipe 69 from freezing. In the present embodiment, the freeze prevention mechanism uses engine cooling water of the diesel engine 11 passing through the pipe 80. Specifically, the engine cooling water immediately after cooling the diesel engine 11 reaches the second portion 80b through the first portion 80a of the pipe 80 while maintaining a relatively high temperature. The second portion 80b is a part of the pipe 80 that is in contact with the outer surface of the urea water tank 200. When the engine coolant flows through the second portion 80b, it supplies heat to the urea water tank 200 and the urea water in the tank. After that, when the engine cooling water flows through the third portion 80c of the pipe 80 installed adjacent to the pipe 69, it supplies heat to the pipe 69 and the urea water therein. Thereafter, the engine cooling water that has released heat and has reached a relatively low temperature passes through the fourth portion 80d of the pipe 80 and reaches the radiator 191 (see FIG. 8). In this way, the freeze prevention mechanism supplies heat to the urea water tank 200 and the pipe 69 using the engine cooling water, and prevents the urea water tank 200 and the pipe 69 from freezing.

  Next, with reference to FIG. 8 to FIG. 12, the arrangement structure of the working machine (the shovel and the rif mag machine) according to the present embodiment in the upper revolving unit 3, that is, each working machine ( The arrangement structure common to the excavator and the rif mag machine will be described.

  FIG. 8 is a plan view showing an example of an arrangement structure of various components in the upper swing body 3 of the work machine according to the present embodiment. FIG. 9 is a right side view showing an example of an arrangement structure of various components at a right front portion of the upper swing body 3 of the work machine according to the present embodiment. FIG. 10 is a front view showing an example of an arrangement structure of various components at a right front portion of the upper swing body 3 of the work machine according to the present embodiment. FIG. 11 is a perspective view showing a right front portion of the upper swing body 3 of the work machine according to the present embodiment, and FIG. 11A is a perspective view as viewed obliquely from the upper right front, and FIG. ) Shows a perspective view as viewed from diagonally upper left. FIG. 12 is a front view showing a right front portion of the upper swing body 3 of the work machine according to the present embodiment.

  As shown in FIG. 8, the upper swing body 3 includes a swing frame 140, and various components mounted on the upper swing body 3 are fixed on the swing frame 140.

  The revolving frame 140 is a cross member that connects a pair of center frames 141 and side frames 142 extending in a longitudinal direction in the front-rear direction of the upper revolving unit 3 and connects other reinforcing frames and the respective frames in the left-right direction. And so on.

  The center frame 141 includes a pair of left and right frames 180L and 180R that support the boom 4 in a manner sandwiching the boom 4 from the left and right at the front part of the upper swing body 3.

  The side frames 142 include a side frame 142L provided at the left end of the upper swing body 3 and a side frame 142R provided at the right end of the upper swing body 3.

  As shown in FIG. 8, a diesel engine 11 is disposed at the center of the rear part of the upper-part turning body 3. The diesel engine 11 is mounted on the center frame 141 via a vibration isolation mount (not shown).

  A reduction gear 13 located on the right side of the diesel engine 11 is connected so as to be able to transmit power, and a motor generator is provided on the opposite side (ie, right side) of the reduction gear 13 to the side where the diesel engine 11 is connected. 12 is connected so as to be able to transmit power. That is, the diesel engine 11, the speed reducer 13, and the motor generator 12 are integrally disposed from the rear center of the upper swing body 3 to the right rear.

  An exhaust gas treatment device 150 is arranged above the motor generator 12 and the speed reducer 13. The exhaust gas processing device 150 and the diesel engine 11 (specifically, the turbocharger 61 shown in FIG. 7) are connected by an exhaust pipe 62.

  A cooling unit 190 is arranged on the left rear portion of the upper revolving unit 3 (that is, on the left side of the diesel engine 11). The cooling unit 190 includes a radiator 191 for the diesel engine 11, a radiator 192 for the hybrid, a water pump 193, and the like.

  A cabin 10 is arranged at a left front portion of the upper swing body 3.

  A boom 4 (not shown) is supported at the front center of the upper swing body 3 (to the right of the cabin 10) so as to be sandwiched between the left frame 141L and the right frame 141R from the left and right. Specifically, the boom 4 is sandwiched between the left frame 141L and the right frame 141R, and a boom pin (not shown) penetrates the left frame 141L, the boom 4, and the right frame 141R, so that the boom 4 is vertically moved. It is rotatably supported.

  A turning electric motor 21 is arranged near the center of the upper swing body 3, that is, near the swing center of the upper swing body 3.

  A fuel tank 160 is provided at a central portion on the right side of the upper swing body 3 (in front of the speed reducer 13, the motor generator 12, and the exhaust gas treatment device 150). Fuel (light oil) of the diesel engine 11 stored in the fuel tank 160 is supplied to the diesel engine 11 via a fuel pipe (not shown).

  As shown in FIG. 8, the electric drive component and the urea water tank 200 are connected to a boom 4 supported at the front right side of the upper revolving unit 3 (that is, at the front and center of the fuel tank 160 disposed at the right center part). To the right).

  As shown in FIG. 9, the urea water tank 200 is fixed on (the floor surface 143 of) the revolving frame 140 adjacent to the front of the fuel tank 160.

  As shown in FIGS. 8 to 10, a filler pipe 201 extending upward is attached to the urea water tank 200, and a filler 202 is provided at the tip of the filler pipe 201. As described above, by lifting and installing the filler 202 at a relatively high position, it becomes easier for the operator to replenish the urea water in a state where the filler 202 has reached a lifting step 220 described later. That is, for example, when the filler 202 is installed near the upper end position of the urea water tank 200, the urea is moved to the first step 221 (described later) or the second step 222 (described later) of the elevating step 220. You need to bend your hips when refilling water. On the other hand, by lifting the filler 202 to a relatively high position, the worker can reduce the amount of bending down when replenishing the urea water, and thus easily replenish the urea water.

  As shown in FIG. 10, the position of the filler 202 is shifted from the fuel gauge 161 provided at the upper left end of the front end surface of the fuel tank 160 in the left-right direction. As a result, as described later, it is possible to provide the elevating step 220 in which the fuel gauge 161 can be visually recognized from the front and diagonally above.

  As shown in FIG. 9, the capacitor 19 is disposed on (the floor surface 143 of) the revolving frame 140 adjacent to the front of the urea water tank 200. Hereinafter, an example of a fixing structure of the capacitor 19 will be described with reference to FIG.

  FIG. 13 is a diagram illustrating an example of a fixing structure of the capacitor 19.

  As shown in FIGS. 8 to 10 and 13, the capacitor 19 is housed in a housing (hereinafter, referred to as “capacitor housing”) 19H having a substantially rectangular parallelepiped outer shape. The capacitor housing 19H has flat mounting feet 19b extending forward and rearward at its four corners, and the mounting feet 19b are attached to (the floor surface 143 of) the revolving frame 140 via the support 19M. Fixed. Specifically, as shown in FIG. 13, the support portion 19M includes damping rubbers 19Ma, 19Mb, washers 19Mc, 19Md, bolts 19Me, and nuts 19Mf. The laminated body in which the revolving frame 140 (the floor surface 143 thereof), the damping rubber 19Mb, the washer 19Md, the mounting foot 19b, the washer 19Mc, and the damping rubber 19Ma are stacked in this order has a vertical through hole, The bolt 19Me is inserted vertically through the through hole from above and the nut 19Mf fastened to the tip of the bolt 19Me is fastened in the vertical direction.

  Note that the capacitor housing 19H has the same physical size of the shovel and the rif mag machine included in the working machine series according to the present embodiment. That is, the capacitor housing 19H is shared between the shovel and the rif mag machine. However, the configuration of the capacitor 19 (for example, the number of built-in capacitor cells, the specifications of each capacitor cell, etc.) may be the same between the shovel and the rifmag machine, or may be different.

  As shown in FIGS. 9 and 10, on the capacitor 19 (ie, the capacitor housing 19H), an upper surface 205A raised (ie, separated) from the floor surface 143 of the revolving frame 140, and legs 205B. Is provided. The inverter 18 and the step-up / step-down converter 100 are arranged on the upper surface 205A of the support member 205. That is, the inverter 18 and the buck-boost converter 100 are arranged on the capacitor 19.

  As shown in FIG. 8, a work lamp 210 is disposed at the left front end of the upper surface 205A of the support member 205. The work lamp 210 can visually recognize an irradiation part (a part that irradiates light) from outside through a slit part 221F provided in a cover part 221C described later.

  As shown in FIGS. 8 and 10, the inverter 18 is housed in the inverter housing 18H and fixed to the upper surface 205A of the support member 205. The buck-boost converter 100 is housed in a housing (hereinafter, referred to as a “converter housing”) 100H, and is fixed to the upper surface 205A of the support member 205. Specifically, each of the inverter housing 18H and the converter housing 100H has a substantially rectangular parallelepiped outer shape having substantially the same size. Then, the inverter housing 18H and the converter housing 100H are arranged left and right from the left in the order of the inverter housing 18H and the converter housing 100H so that the longitudinal direction of each outer shape is aligned with the front-rear direction. 205A.

  The fixing structure of the inverter housing 18H and the converter housing 100H to (the upper surface 205A of) the support member 205 may be the same as the fixing structure of the capacitor 19 shown in FIG. 10, or may be another structure.

  8 and 10, the inverter housing 18H and the converter housing 100H are arranged close to the left end of the upper surface 205A of the support member 205. Specifically, converter housing 100H is disposed at the center in the left-right direction of upper surface 205A of support member 205, and inverter housing 18H is located on the left side of converter housing 100H on upper surface 205A of support member 205 (ie, , The left end of the upper surface 205A). At the left end of the upper surface 205A of the support member 205, there is provided a region 208a (see FIG. 14) in which another component having the same size as the inverter housing 18H and the converter housing 100H in plan view can be arranged. In the area 208a of the upper surface 205A adjacent to the right side of the converter housing 100H, components specific to each work machine of the work machine series according to the present embodiment can be arranged. For example, in the area 208a, a housing (hereinafter, referred to as a “rif mag driver housing”) 48H accommodating a rif mag driver 48 (see a dotted frame in FIGS. 8 and 10), which is a component unique to the rif mag machine, is provided. Can be arranged.

  8 and 9, the inverter housing 18H, the converter housing 100H, and the rif mag driver housing 48H are arranged as close to the front end of the upper surface 205A of the support member 205 as possible. As a result, it is possible to secure a certain distance between the rear ends of the inverter housing 18H, the converter housing 100H, and the rif mag driver housing 48H and the urea water tank 200, so that a wire harness connected to the rear end can be provided. It becomes easy to manage the cooling pipe and the like. However, as described above, since the work light 210 is fixed to the left front end of the upper surface 205A of the support member 205, the front end of the inverter housing 18H is located at the front end of the converter housing 100H and the rif mag driver housing 48H. More backwards. Hereinafter, the configuration of the support member 205 that fixes the inverter housing 18H, the converter housing 100H, and the rif mag driver housing 48H will be described with reference to FIG.

The inverter housing 18H is disposed on the right side of the converter housing 100H on the upper surface 205A of the support member 205, and a component (rif mag driver housing 48H) unique to each work machine of the work machine series according to the present embodiment is on the left side. May be arranged. Further, the left and right positions of the inverter housing 18H and the converter housing 100H may be reversed. In addition, the inverter housing 18H and the converter housing 100H are arranged at the left end or the right end on the upper surface 205A of the support member 205, and a component (a rif-mag driver housing 48H) unique to each work machine of the work machine series according to the present embodiment. ) May be a structure that can be arranged at the center of the upper surface 205A in the left-right direction. Also, on the upper surface 205A of the support member 205,
FIG. 14 is a perspective view illustrating an example of the support member 205.

  As shown in FIG. 14, a fixing portion 209 for fixing the work light 210 is provided at the left front end of the upper surface 205 </ b> A of the support member 205. The fixing portion 209 includes an area 209a where the work light 210 is arranged, and two front and rear fastening holes 209b. A fixing portion 206 for fixing the inverter housing 18H is provided behind the fixing portion 209 at the left end of the upper surface 205A of the support member 205. The fixing portion 206 includes a region 206a in which the inverter housing 18H is arranged, and four fastening holes 206b, two in front and two in back.

  Further, a fixing portion 207 for fixing the converter housing 100H is provided at a central portion of the upper surface 205A of the support member 205 in the left-right direction. The fixing portion 207 includes a region 207a in which the converter housing 100H is arranged, and a total of four fastening holes 207b, two at the front and two at the rear.

  At the right end of the upper surface 205A of the support member 205, a fixing portion 208 for fixing a component (rif mag driver housing 48H) unique to each work machine of the work machine series according to the present embodiment is provided. The fixing portion 208 includes a region 208a in which the component is arranged, and a total of four fastening holes 208b, two at the front and two at the rear.

As described above, in order to arrange the inverter housing 18H, the converter housing 100H, and the rif-mag driver housing 48H as close to the front as possible, the fixing portions 207 and 208 are
It is provided closer to the front.

  Thus, the inverter housing 18H and the converter housing 100H are arranged side by side on the upper surface 205A of the support member 205. And, on the upper surface 205A of the support member 205, there is provided a fixing portion 208 which can further arrange and fix a component (a rif mag driver housing 48H) specific to each work machine of the work machine series according to the present embodiment. Thereby, the arrangement structure of the right front portion of the upper swing body 3 can be shared between the shovel and the rif mag machine included in the working machine series according to the present embodiment. Further, since the support member 205 has the same physical size (at least in the left-right direction and the front-back direction) between the shovel and the rif mag machine included in the working machine series according to the present embodiment, the components of the support member 205 Can be shared. In addition, the support member 205 is provided separately from a frame (house frame) (not shown) constituting the main house portion of the upper swing body 3. Therefore, the house frame can be shared between the shovel and the rif mag machine.

  Note that converter housing 100H may be arranged at a place other than upper surface 205A of support member 205. That is, the fixing portion 207 of the upper surface 205A is omitted, the inverter casing 18H is fixed to the fixing portion 206 in the shovel, and the inverter casing 18H and the rif mag driver casing are fixed to the fixing portion 206 and the fixing portion 208 in the rif mag machine. The body 48H may be fixed. In this case, for example, a small capacitor is used instead of the capacitor 19 in common with the work machine series according to the present embodiment, and a small capacitor (a housing for housing) is provided on the floor surface 143 below the upper surface 205A. Converter housing 100H may be arranged.

  Returning to FIG. 8, the inverter 18 drives the motor generator 12 and the turning electric motor 21 using the electric power supplied from the capacitor 19 via the step-up / step-down converter 100. Therefore, the inverter 18 is connected to the motor generator 12 and the turning electric motor 21 via the wire harness 31 and the wire harness 32, respectively. The outlets of the wire harnesses 31 and 32 (connectors to the wire harnesses 31 and 32) in the inverter housing 18H are disposed in the longitudinal direction of the substantially rectangular parallelepiped outer shape of the inverter housing 18H (hereinafter simply referred to as “the longitudinal length of the inverter housing 18H”). Direction) is provided on the side surface of the rear end (that is, the rear end surface).

  The inverter housing 18H has a connection connector for connecting a wire harness (not shown) to the step-up / step-down converter 100 on the rear end face in the longitudinal direction, similarly to the connection connector for connecting the wire harnesses 31 and 32. Further, the step-up / step-down converter 100 has a connection connector for connecting the wire harness on a rear end face in a longitudinal direction (hereinafter, simply referred to as “longitudinal direction of the converter housing 100H”) in an outer shape of a substantially rectangular parallelepiped. The step-up / step-down converter 100 has a connection connector for connecting a wire harness (not shown) to the capacitor 19 on the rear end face in the longitudinal direction. In addition, the capacitor housing 19H has a connector on the rear end face for connecting the wire harness.

  As shown in FIG. 8, the wire harness 31 extending rearward from the inverter 18 is bent rightward so as to avoid interference with the rear urea water tank 200, and the front of the urea water tank 200 is directed from left to right. Are arranged in a manner to extend. As shown in FIGS. 9 and 10, the wire harness 31 is bent downward at a position to the right of the right end of the urea water tank 200 and passes through a hole (not shown) provided in the floor surface 143. Penetrate into. The wire harness 31 that penetrates below the floor surface 143 is bent rearward, and is routed along the inside of the side frame 142R so as to extend longitudinally from under the fuel tank 160 from front to back. Then, the wire harness 31 penetrates over the floor surface 143 through a hole (not shown) provided in the floor surface 143 at a position rearward of the rear end of the fuel tank 160, is bent to the right, and is bent to the right. Is connected to the motor generator 12 arranged on the right rear of the vehicle.

  The wire harness 32 extending rearward from the inverter 18 is bent leftward, straddling (or penetrating) the right frame 141 </ b> R located on the left side of the urea water tank 200, and near the center of the upper rotating body 3. It is connected to the turning electric motor 21 arranged.

  Cooling water is supplied from the radiator 192 to the electric drive components. The cooling water circulates through a cooling water passage (water jacket) provided in the inverter housing 18H, the converter housing 100H, and the capacitor housing 19H. In the riff mag machine equipped with the rif mag driver 48, the cooling water further circulates through the water jacket provided in the rif mag driver housing 48H. Thus, the inverter 18, the step-up / step-down converter 100, the capacitor 19, and the rif mag driver 48 can be cooled. Hereinafter, the cooling system of the electric drive component will be described with reference to FIG.

  FIG. 15 is a diagram illustrating an example of a cooling system that cools the motor generator 12, the turning motor 21, and the electric drive components.

  The cooling system includes a radiator 192, a water pump 193, a cooling pipe 194, a reserve tank 195, and the like.

  The water pump 193 sucks in and discharges the cooling water in the cooling system, that is, the cooling water in the cooling pipe 194 and the reserve tank 195, and circulates the cooling water in the cooling circuit including the cooling pipe 194. Specifically, as shown in FIG. 14, the water pump 193 draws in the cooling water cooled by the radiator 192 through the cooling pipe 194a, and discharges the cooling water to the cooling pipe 194b.

  The cooling water discharged by the water pump 193 is cooled by a cooling pipe disposed adjacent to each of the capacitor 19, the inverters 18A and 18B, the step-up / step-down converter 100, the turning motor 21, the motor generator 12, and the speed reducer 13. After passing through 194, the process returns to the radiator 192. Specifically, the cooling water discharged to the cooling pipe 194b by the water pump 193 is first supplied to the capacitor 19 (water jacket in the capacitor housing 19H) and then discharged to the cooling pipe 194c. The cooling pipe 194c is connected to a connection portion 196 (for example, a fluid coupling or the like) capable of shunting the cooling water, and can supply the cooling water of the cooling pipe 194c to a plurality of devices in parallel. In this example, the connection part 196 is configured to be able to divide the cooling water of the cooling pipe 194c into three cooling pipes 194d to 194f, and the cooling pipe 194d is connected to the inverters 18A and 18B (that is, in the inverter housing 18H). The cooling pipe 194e is connected to the buck-boost converter 100 (that is, the water jacket in the converter housing 100H). In the rif mag machine, the cooling pipe 194f is connected to the rif mag driver 48 (that is, the water jacket in the rif mag driver housing 48H). The cooling water that has passed through the inverter housing 18H and the converter housing 100H (in the case of a rif mag machine, the cooling water that has passed through the inverter housing 18H, the converter housing 100H, and the rif mag driver housing 48H) joins again at the connection portion 197. Then, the cooling motor circulates through the cooling pipe 194 in the order of the turning motor 21, the motor generator 12, and the speed reducer 13, and returns to the radiator 192.

  Note that the configuration of the cooling circuit shown in FIG. 15 is an example, and an arbitrary connection method may be adopted. For example, in FIG. 15, the water pump 193 may draw in cooling water before being cooled by the radiator 192 and discharge the cooling water to the radiator 192. The cooling pipes 194 are arranged in parallel at portions adjacent to the inverters 18A, 18B and the step-up / step-down converter 100 (inverters 18A, 18B, step-up / step-down converter 100, and the rif mag driver 48 in the case of a rif mag machine). Are arranged in series, but all may be arranged in series, or parallel connection may be adopted in some or all of the other parts.

  As shown in FIG. 8, a cooling pipe 194 b extending from a water pump 193 disposed adjacent to the left side of the radiator 192, longitudinally cuts under the radiator 192 in the front-rear direction, and then bent rightward. It is routed in such a manner as to cross the front of the diesel engine 11 from left to right. The cooling pipe 194 b is bent forward in front of the fuel tank 160, and is routed along the fuel tank 160 and the urea water tank 200 so as to extend longitudinally from the rear to the front. Connected. A connection portion 196 to which a cooling pipe 194c (not shown) extending from the rear end face of the capacitor housing 19H is connected is disposed at a front and rear position between the urea water tank 200, the inverter housing 18H, and the converter housing 100H. You. Cooling pipes 194d and 194e are connected between the connection portion 196 and each of the inverter housing 18H and the converter housing 100H. Further, in the rif mag machine, the connection portion 196 and the rif mag driver housing 48H are further connected by a cooling pipe 194f (dotted line in FIG. 8).

  In FIG. 8, the connection portion 197 is not shown, but the arrangement of the connection portion 197, the connection portion 197, the inverter housing 18H and the converter housing 100H (the inverter housing 18H and the converter housing The connection with the body 100H and the rif mag driver housing 48H) is the same as that of the connection portion 196.

  As described above, the circulation path of the cooling system of the electric drive components includes the cooling pipe 194d connected to the inverter casing 18H and the cooling pipe 194e arranged in parallel with the cooling pipe 194d and connected to the converter casing 100H. . The cooling pipe 194d and the cooling pipe 194e are arranged in parallel, and have a connection portion 196 to which a cooling pipe 194f connected to the rif mag driver housing 48H can be connected. This makes it possible to share the cooling system for the electric drive components between the shovel and the rif mag machine included in the working machine series according to the present embodiment.

  As shown in FIGS. 9, 11, and 12, various parts (a urea water tank 200, an inverter 18, a capacitor 19, a step-up / down converter 100, a rif mag driver 48, An elevating step 220 is provided so as to cover the lamp 210). The elevating step 220 is provided in a rear-up position, and the operator can ascend to the upper part of the house from the front of the upper revolving unit 3 and check the engine room. The elevating step 220 is also provided with an opening (opening 223B) for accessing a filler 202 of the urea water tank 200, which will be described later. Replenishment can be performed. The elevating step 220 includes a first step 221, a second step 222, and a third step 223 from below.

  As shown in FIGS. 11 and 12, a handrail 225 is provided at the right end of the elevating step 220. An outer cover 230 is attached to the outside (right end) of the elevating step 220. That is, the exterior cover 230 covers the various component groups at the right front part of the upper swing body 3 from the right side. An inner cover 240 is attached to the inside (left end) of the elevating step 220. That is, the inner cover 240 covers various component groups at the right front part of the upper swing body 3 from the left.

  As shown in FIG. 9, the first stage step 221 includes a first stage step main body 221A that covers the electric drive components (the inverter housing 18H, the capacitor housing 19H, the converter housing 100H, and the rif-mag driver housing 48H). The first step main body 221A has an opening 221B on the front end surface.

  The opening 221 </ b> B is provided for the operator to maintain the electric drive components and the work lamp 210 housed in the first step 221. For example, as shown in FIG. 10, a safety switch cover 19s is provided on the capacitor housing 19H. Since the capacitor 19 can output a very high voltage, when performing maintenance on the electric drive system including the capacitor 19, it is necessary to remove the safety switch cover 19s and cut off the power path by the safety switch. Further, the work lamp 210 needs to be replaced when the light bulb stops lighting due to the life or the like. At this time, the operator can access both the safety switch cover 19s and the work light through the opening 221B (dotted frame in FIG. 10). Therefore, it is possible to suppress an increase in cost as compared with a case where a cover for maintenance of the electric drive component and a cover for maintenance of the work light 210 are separately provided.

  Further, as shown in FIG. 7, the opening 221B is provided in such a manner that a maintenance target portion (safety switch cover 19s) of the capacitor 19 and a maintenance target portion (irradiation portion) of the work lamp are visible from the front. Can be Therefore, the operator can easily perform maintenance of both the electric drive component and the work light 210.

  The opening 221B only needs to be able to access the maintenance target part (the safety switch cover 19s) of the capacitor 19 and the maintenance target part (irradiation part) of the work light 210, and cannot visually recognize each maintenance target part from the front. May be. That is, the opening 221 </ b> B may be provided so that one of the maintenance target parts can be visually recognized from the front, or may be provided so as not to be visible.

  The first step 221 includes a cover 221C that covers the opening 221B from the front. The cover portion 221C is configured to be detachable from the first step 221 (see an outline arrow in FIG. 9), and an opening 221B is provided in addition to the front end surface of the first step main body 221A provided with the opening 221B. It is provided so as to cover the upper surface that is not available. That is, the cover portion 221C overlaps the upper surface (the portion on which the operator places his or her feet) of the first step 221 (specifically, the first step main body 221A). Accordingly, since the upper surface of the first step body 221A and the upper surface of the cover portion 221C can support a load from above, the thickness of the first step body 221A and the thickness of the cover portion 221C can be reduced. Can be thin. Therefore, the weight of the first step body 221A can be reduced, and the load on the operator in the assembling process can be reduced. Further, the weight of the cover portion 221C can be reduced, and the burden on the worker during the assembly process can be reduced, and the burden on the worker during the maintenance work can be reduced. The weight of the cover portion 221C has a mass equal to or less than a predetermined value that can be carried by an operator, for example, a mass equal to or less than 15 kg.

  Further, as described above, the inverter 18 and the step-up / step-down converter 100 are housed in the different inverter housing 18H and the converter housing 100H, respectively, and then arranged side by side. Further, as described above, in the rif mag machine, the inverter 18, the buck-boost converter 100, and the rif mag driver 48 are housed in different inverter housings 18H, converter housings 100H, and rif mag driver housings 48H, respectively. Are arranged side by side. This makes it possible to keep the height of the entire electric drive component relatively low, so that the height of the portion of the elevating step 220 that covers the electric drive component can be kept low. Therefore, for example, the step of the portion that covers the electric drive component becomes higher, and it is not necessary to add a step with a short front-rear dimension to the front of the step, and the portion that covers the electric drive component is used as the first step 221. can do. That is, the lifting and lowering of the lifting and lowering step 220 is facilitated. Also, by adopting a configuration in which the inverter housing 18H, the converter housing 100H, and the rif mag driver housing 48H can be arranged side by side on the upper surface 205A of the support member 205, the same good house top can be used for both the shovel and the rif mag machine. It is possible to realize getting on and off the vehicle.

  The cover 221C is provided in a detachable manner. For example, the cover 221C may be provided so as to be rotatable around a rear end as a rotation center, as in the case of covers 222C and 223C described later.

  Further, as shown in FIGS. 11 and 12, the cover portion 221C is provided with a slit portion 221F. As shown in FIG. 12, the slit portion 221F is provided at the same position in the up-down direction and the left-right direction as the work lamp 210 in a state where the cover portion 221C is attached to the first step main body 221A. That is, with the cover part 221C attached to the first step main body 221A, the irradiation part of the work light 210 is visible from the front through the slit part 221F.

  The slit portion 221F that allows the light from the irradiation unit of the work lamp 210 to pass forward is provided at the upper end of the front end surface of the first step 221 (specifically, the cover portion 221C). That is, the work light 210 is provided on the upper surface 205A of the support member 205 raised from the floor surface 143 where the capacitor housing 19H is arranged. Therefore, it is possible to make it difficult for the light emitted forward from the slit portion 221F to be blocked by the step 145 provided at the front end of the turning frame 140, and the work light 210 can reliably irradiate the ground in front of the shovel. it can. Further, since the work light 210 is provided at the left front end of the upper surface 205A of the support member 205, it can irradiate a portion near the boom 4 in front of the work machine. Therefore, it is possible to reliably irradiate the place where the work is actually performed.

  The slit portion 221F is configured to be grippable by an operator, for example, by attaching a protective material to an end portion. This eliminates the need to provide a dedicated grip on the cover 221C, and can suppress an increase in cost, an increase in mass, and the like.

  As shown in FIG. 11, the cover portion 221 </ b> C has a curved surface shape having substantially the same curvature as the curved surface shape of the outer cover 230 adjacent to the right side. Thereby, it is possible to produce a sense of unity in the design between the exterior cover 230 and the cover portion 221C.

  As shown in FIG. 11, a footrest 221D having an anti-slip function is provided on the upper surface of the cover 221C.

  As shown in FIG. 9, the second step 222 includes a work box 222A arranged at the rear of the upper surface of the first step main body 221A. That is, the elevating step 220 uses the work box 222A as the second step 222. The work box 222A is used, for example, to accommodate a grease pail can, an electric pump, an automatic greasing device including a grease gun, a tool, and the like.

  The work box 222A includes an opening 222B from the front end surface to the upper surface, and includes a cover 222C that covers the opening 222B. As shown in FIG. 9, the cover 222C is provided so as to be rotatable around a rear end. Thus, the operator can rotate the cover 222C upward to access the contents in the work box 222A from the opening 222B.

  As shown in FIG. 11, a footrest 222D having a non-slip function is provided on the upper surface of the cover 222C.

  As shown in FIG. 9, the third step 223 includes a third step main body 223A that covers the urea water tank 200, the filler pipe 201, and the filler 202 from the front and the upper. The third step main body 223A includes an opening 223B from the upper surface to the front surface (specifically, a portion of the front surface higher than the second step 222), and includes a cover 223C that covers the opening 223B. As shown in FIG. 9, the cover 223C is provided so as to be rotatable around a rear end.

  Note that a footrest 223D having an anti-slip function is provided on the upper surface of the third step 223 (cover 223C).

  As shown in FIG. 9, the opening 223 </ b> B is provided so as to overlap the position where the filler 202 is arranged in the front-back direction. Further, although not shown, the opening 223B is provided in a manner to overlap the position where the filler 202 is arranged in the left-right direction. Thus, the operator can rotate the cover portion 223C upward, access the filler 202 from the opening portion 223B, and replenish the urea water tank 200 with the urea water.

  As shown in FIG. 9, the filler 202 is provided so as to be higher than the upper surface of the second step 222 (work box 222A). Therefore, when supplying the urea water to the urea water tank 200 from the first step 221 or the second step 222, the operator does not need to bend down greatly and the urea water can be easily supplied.

  Further, as described above, since the position of the filler 202 is shifted from the fuel gauge 161 in the left-right direction, as shown in FIG. 11, the third step 223 (specifically, at the same height position as the fuel gauge 161). , The right end of the third step body 223A) is on the left side of the left and right positions of the fuel gauge 161. That is, the third step 223 (the third step main body 223A) is arranged closer to the left side than the fuel gauge 161, and the fuel gauge 161 is interposed between the third step 223 and the outer cover 230. It can be seen from the front.

  As shown in FIGS. 11 and 12, a scaffold member 224 having the same height as the upper surface of the third step 223 is provided at the right end of the third step body 223A. The scaffold member 224 is provided so as to cover the space between the third step body 223A and the exterior cover 230 from above. Therefore, by providing a space between the third step body 223A and the exterior cover 230, it is possible to prevent inconveniences such as a reduction in the width on which the feet of the operator are placed. That is, by providing the scaffolding member 224, it is possible to prevent a decrease in convenience when the worker uses the elevating step 220.

  Further, as shown in FIG. 11B, the scaffold member 224 is provided with a slit portion in the front-rear direction, so that the scaffold member 224 can be viewed from above and below through the slit portion. . Therefore, the operator can visually recognize the fuel gauge 161 from an obliquely upper position through the slit portion and the space between the third step body 223A and the outer cover 230.

  As shown in FIG. 12, the scaffold member 224 extends rightward from the upper end of the right side surface of the third step body 223A. That is, the scaffold member 224 is fixed to the upper end of the right side surface of the third step body 223A. Therefore, the situation where the fixing structure of the scaffold member 224 blocks the front of the fuel gauge 161 can be prevented, and visibility (specifically, visibility from the front) of the fuel gauge 161 can be secured.

  Further, as shown in FIG. 12, the thickness (vertical dimension) of the scaffold member 224 is set to be 3rd in order to secure the strength of the joint between the scaffold member 224 and the right side surface of the third step body 223A. It is set so as to become larger as it comes closer to the step body 223A. That is, the thickness of the scaffold member at the joint with the third step main body 223A is set relatively large in order to secure the joint strength.

  Note that the scaffold member 224 may be provided with a transparent portion that allows the fuel gauge 161 to be viewed obliquely from above, instead of the slit portion.

  As described above, the embodiments for carrying out the present invention have been described in detail. However, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention described in the appended claims. Can be modified and changed.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 1A, 1B Hydraulic motor 2 Slewing mechanism 3 Upper revolving body (revolving body)
4 Boom 5 Arm 6 Bucket 6A Lifting magnet 6M Electromagnetic coil 7 Boom cylinder 8 Arm cylinder 9 Bucket cylinder 10 Cabin 11 Diesel engine 12 Motor generator (motor)
13 speed reducer 14 main pump 15 pilot pump 16 high pressure hydraulic line 17 control valve 18, 18A, 18B inverter 18H case (first case)
Reference Signs List 19 capacitor 19b mounting foot 19H housing 19M support portion 19s safety switch cover 21 motor for turning (motor)
22 Resolver 23 Mechanical brake 24 Rotation reducer 25 Pilot line 26 Operating device 26A, 26B Lever 26C Pedal 27, 28 Hydraulic line 29 Pressure sensor 30 Controller 31 Wire harness 32 Wire harness 42 Suction switch 44 Release switch 48 Rif mag driver 48H Housing ( Third case)
69 Urea water supply piping 100 Step-up / step-down converter (converter)
100H case (second case)
110 DC bus 111 DC bus voltage detection unit 112 Capacitor voltage detection unit 113 Capacitor current detection unit 120 Energy storage system 140 Turning frame 141 Center frame 141L Left frame 141R Right frame 142, 142L, 142R Side frame 143 Floor surface 145 Step 150 Exhaust gas treatment Apparatus 160 Fuel tank 190 Cooling unit 191 Radiator 192 Radiator 193 Water pump 194 Cooling pipe (circulation path)
194a to 194c cooling pipe 194d cooling pipe (first cooling water passage)
194e cooling pipe (second cooling water channel)
194f cooling pipe (third cooling water channel)
195 Reserve tank 196, 197 Connection part 200 Urea water tank 201 Filler pipe 202 Filler 205 Support member 205A Upper surface (fixing plate)
206 fixing part (first fixing part)
206a area 206b fastening hole 207 fixing part (second fixing part)
207a region 207b fastening hole 208 fixing part (third fixing part)
208a region 208b fastening hole 209 fixing portion 209a region 209b fastening hole 210 work light 220 elevating step 221 first step 221A first step main body 221B opening 221C cover 221D footrest section 221F slit section 222 second step 222A work Box 222B Opening 222C Cover 222D Foot rest 223 Third step 223A Third step main body 223B Opening 223C Cover 223D Foot rest 224 Scaffolding member 230 Exterior cover 240 Inner cover

Claims (5)

Revolving structure,
Electric motor,
A power storage device mounted on the right front portion of the revolving superstructure,
An inverter mounted on a right front portion of the revolving body in a state housed in the first housing, and disposed on a power path between the power storage device and the electric motor;
A converter mounted on a right front portion of the revolving structure in a state housed in a second housing different from the first housing, and disposed on a power path between the power storage device and the inverter;
A fixing plate fixed to a revolving frame at a front right portion of the revolving structure and including a first fixing portion to which the first housing is fixed, and a second fixing portion to which the second housing is fixed; A support member;
An elevating step provided at a right front portion of the revolving body in a manner to cover the power storage device, the first housing, the second housing, and the support member;
On the fixing plate, the first housing and the second housing are arranged side by side, and a third housing different from the first housing and the second housing is further arranged and fixed. A fixing part is provided,
Work machine. Lifting magnet,
A rif mag driver provided in a power path between the power storage device and the lifting magnet,
The riff mag driver is housed in the third housing and fixed to the third fixing portion.
The work machine according to claim 1. A circulation path for supplying cooling water to the first housing and the second housing;
The circulation path includes a first cooling water path connected to the first housing, and a second cooling water path arranged in parallel with the first cooling water path and connected to the second housing. A connection portion that is arranged in parallel with the first cooling water passage and the second cooling water passage and that can connect a third cooling water passage connected to the third housing;
The work machine according to claim 1. The support member is provided separately from a house frame of the revolving body,
The working machine according to claim 1. A series of working machines having a shovel and a rif mag machine,
The shovel and the rif mag machine are:
An electric motor, a power storage device mounted on a right front portion of the revolving structure, and a power storage device mounted on the right front portion of the revolving structure housed in the first housing, on a power path between the power storage device and the motor. And an inverter disposed in a second housing different from the first housing, mounted on a right front portion of the revolving structure, and arranged on a power path between the power storage device and the inverter. Converter, a first fixed portion fixed to the revolving frame at the right front portion of the revolving structure, and the first case is fixed, and a second fixed portion to which the second case is fixed. A supporting member having a fixed plate, and an elevating step provided on the right front portion of the revolving structure in a manner to cover the power storage device, the first housing, the second housing, and the supporting member are commonly used. Prepared,
The first casing and the second casing are arranged side by side on the fixing plate in common with the shovel and the rif mag machine, and a third casing different from the first casing and the second casing. A third fixing portion that can further arrange and fix the housing is provided,
In the lift mag machine, a lift mag driver provided in a power path between the power storage device and a lifting magnet is housed in the third housing and fixed to the third fixing portion.
Working machine series.

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