JP2017179749A - Work machine and work machine series - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine and a work machine series that enable sharing of a layout structure at a right front part of a revolving superstructure with a lifting magnet machine, shovel, and other work machines, at the same time allowing worker to readily ascend to/descend from a top part of a house.SOLUTION: A work machine includes: a support member having a fixing plate that includes an inverter mounted on a right front part of a revolving superstructure while being stored in a first housing, a converter mounted on the right front part of the revolving superstructure while being stored in a second housing different from the first housing, a first fixing part fixed on a revolving frame at the right front part of the revolving superstructure and having the first housing fixed thereon, and a second fixing part having the second housing fixed thereon; an ascent/descent step provided on the right front part of the revolving superstructure and covering a power storage device, the first housing, the second housing, and the support member. The fixing plate has the first housing and the second housing laid out thereon next to each other, and is provided further with a third fixing part for laying out and fixing a third housing different from the first housing and the second housing.SELECTED DRAWING: Figure 8

Description

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

  2. Description of the Related Art Conventionally, a hybrid work machine including an electric motor (assist motor) that assists an engine that is a driving force source of a hydraulic pump and an electric motor (swing motor) that drives a turning body to turn is known (for example, Patent Documents). 1).

  Patent Document 1 discloses a working machine (hereinafter referred to as a “lift magnet”) including a lifting magnet (hereinafter referred to as a “lift magnet”). Specifically, a power storage device (capacitor), a converter, a first drive component (inverter) that drives an electric motor, and a second drive component (inverter) that drives a riff mug are integrated as a module, and the right front of the swivel body It is arranged in the part.

JP 2011-21432 A

  However, in the configuration of Patent Document 1, the converter, the first and second driving components, and the like are integrally mounted as a module. Therefore, the arrangement structure cannot be diverted to a working machine other than the riff mag machine such as a hybrid excavator, and there is a possibility that the cost of parts increases.

  Further, in the configuration of Patent Document 1, a module in which a converter, first and second driving components and the like are stacked is mounted on a power storage device arranged on a swing frame of a swing body. Therefore, the front and rear dimensions and the vertical dimension of the part occupied by the power storage device and the module are very large, and the front and rear dimensions of the lifting step provided in a manner covering the power storage device and the module are shortened. May be difficult to remove.

  Therefore, in view of the above problems, the arrangement structure at the right front part of the swivel body can be shared between the riffmag machine and other work machines such as an excavator, and the operator can easily move up and down to the upper part of the house. The object is to provide a work machine and a series of work machines.

In order to achieve the above object, in one embodiment,
A swivel,
An electric motor,
A power storage device mounted on the right front of the revolving structure;
An inverter mounted on the right front of the swivel body in a state of being accommodated in the first housing, and disposed on a power path between the power storage device and the motor;
A converter mounted on the 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 that is fixed to a revolving frame on a right front portion of the revolving structure and includes 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 swivel body in a manner to cover the power storage device, the first housing, the second housing, and the support member,
The first casing and the second casing are arranged side by side on the fixing plate, and a third casing different from the first casing and the second casing can be further arranged and fixed. A fixing part is provided,
A work machine is provided.

Moreover, it is a series of work machines having an excavator and a riffmag machine,
The excavator and the riffmag machine are
An electric motor, a power storage device mounted on the right front portion of the revolving structure, and a power storage device mounted on the right front portion of the revolving structure in a state of being accommodated in the first housing, on a power path between the power storage device and the motor Mounted on the right front part of the swivel body in a state of being 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 converter, a first fixing part fixed to the turning frame at the right front part of the turning body, the first casing being fixed, and a second fixing part fixing the second casing. A support member having a fixing plate, and an elevating step provided at the right front portion of the swivel body in a manner to cover the power storage device, the first housing, the second housing, and the support member. Prepared,
In the fixed plate, the first housing and the second housing are arranged side by side in common with the excavator and the riffmag machine, and a third different from the first housing and the second housing. A third fixing part is provided, which can be further arranged and fixed;
In the riffmag machine, a riffmag 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-mentioned embodiment, the arrangement structure in the right front part of the swivel body can be shared between the riff mag machine and another work machine such as an excavator, and the operator can easily move up and down to the upper part of the house. Work machines and series of work machines can be provided.

It is a side view of an excavator It is a figure which shows an example of a structure of the drive system of an shovel. It is a figure which shows an example of a structure of the electrical storage system of an excavator. It is a side view of a riff mug machine. It is a figure which shows an example of a structure of the drive system of a riffmag machine. It is a figure which shows an example of a structure of a riff mug driver. It is a figure which shows the structure of the exhaust-gas processing apparatus mounted in the working machine which concerns on this embodiment. It is a top view which shows an example of the arrangement structure of the various components in the upper turning body of the working machine which concerns on this embodiment. It is a right view which shows an example of the arrangement structure of the various components in the right front part of the upper turning body of the working machine which concerns on this embodiment. It is a front view which shows an example of the arrangement structure of the various components in the right front part of the upper turning body of the working machine which concerns on this embodiment. It is a perspective view showing the right front part of the upper revolving unit of the working machine according to the present embodiment. It is a front view which shows the right front part of the upper turning body of the working machine which concerns on 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 supporting member which fixes an inverter, a buck-boost converter, a riff mug driver, and a work lamp. It is a figure which shows an example of the cooling system of an electric drive component.

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

  First, a basic configuration of an excavator will be described as an example of a hybrid work machine according to the present embodiment with reference to FIGS.

  FIG. 1 is a side view showing an excavator that is an example of a work 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 an excavator 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 hydraulically driven by a boom cylinder 7, an arm cylinder 8 and a bucket cylinder 9 as hydraulic actuators, respectively. Further, the upper swing body 3 is provided with a cabin 10 on which an operator is boarded, and a diesel engine 11 (see FIG. 2) as a power source is mounted.

  FIG. 2 is a block diagram illustrating a configuration of a drive system of an excavator that 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.

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

  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, and can control the discharge flow rate by adjusting the stroke length of the piston by controlling the angle (tilt angle) of the swash plate.

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

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

  The operating 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 the hydraulic line 27 and the 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 motorized, and the turning electric motor 21 that drives the turning mechanism 2 is provided. The turning electric motor 21 is connected to the power storage system 120 via the inverter 18B. A resolver 22, a mechanical brake 23, and a turning speed reducer 24 are connected to the rotating shaft 21 </ b> A 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 includes, 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 the signal supplied from the pressure sensor 29 (pilot pressure corresponding to the turning operation of the upper swing body 3 in the operating device 26) into a speed command, and controls the drive of the turning electric motor 21.

  Further, the controller 30 performs operation control of the motor generator 12 (switching between electric operation (assist operation) or power generation operation) and also drives and controls the step-up / down converter 100 (see FIG. 3) (see FIG. 3). Charge / discharge control). The controller 30 is a step-up / down converter based on the charge state of the capacitor 19, the operation state of the motor generator 12 (electric operation (assist operation) or power generation operation), and the operation state (power running operation or regenerative operation) of the turning motor 21. By performing switching control between 100 step-up and step-down operations, 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 an excavator that is an example of the work machine according to the present embodiment. The power storage system 120 includes a capacitor 19, a buck-boost converter 100, a DC bus 110, and the like. The DC bus 110 controls transmission and reception of electric power among the capacitor 19, the motor generator 12, and the turning electric motor 21. The capacitor 19 is provided with a capacitor voltage detector 112 that detects the voltage value and current value of the capacitor 19 and a capacitor current detector 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 / down converter 100 switches between the step-up operation and the step-down operation so that the DC bus voltage value falls within a certain range according to the operating state of the motor generator 12 and the turning electric motor 21. The DC bus 110 is disposed between the inverters 18 </ b> A and 18 </ b> B and the buck-boost converter 100, and the capacitor 19, the motor generator 12, and the turning electric motor 21 exchange power via the DC bus 110.

  Switching control between the step-up / 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 FIG. 4 to FIG. 6, a basic configuration of a riffmag machine will be described as another example of the hybrid work machine according to the present embodiment. Hereinafter, the same components as those of the excavator described above are denoted by the same reference numerals, and different portions will be mainly described.

  The configuration of the power storage system 120 of the riff mag machine is represented in FIG. 3 as in the case of the excavator described above.

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

  As shown in FIG. 4, in the riff mag machine according to the present embodiment, a lifting magnet 6 </ b> A (hereinafter referred to as “a 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 riffmag machine that is another example of the work machine according to the present embodiment. As in FIG. 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 riff mug driver 48 is arranged in a power path between the power storage system 120 and the inverter 18A for driving and controlling the motor generator 12, and the riff mug 6A, and excites and drives the electromagnetic coil 6M (see FIG. 6) included in the riff mug 6A. Drive circuit. The riff mug driver 48 has a configuration capable of switching the polarity and applying the voltage Vdc of the DC bus 110 to the riff mug 6A. With this configuration, the riff mug 6A is attracted and released (that is, the electromagnetic coil 6M is excited). (Demagnetization) can be switched. Hereinafter, the configuration of the riff mug driver 48 will be described with reference to FIG.

  FIG. 6 is a diagram illustrating an example of the configuration of the riff mug driver 48. The riff magnet driver 48 is configured by a known H bridge circuit including switching elements 48Ta to 48Td and commutation diodes 48Da to 48Dd. Specifically, the switching elements 48Ta and 48Tb and the switching elements 48Tc and 48Td are connected in series, and the switching elements 48Ta and 48Tb and the switching elements 48Tc and 48Td connected in series are connected in parallel. Further, the terminal MP and the terminal MN of the electromagnetic coil 6M of the riff magnet 6A are connected to the intermediate points of the switching elements 48Ta and 48Tb and the switching elements 48Tc and 48Td connected in series, respectively. Further, commutation diodes 48Da to 48Dd are connected in parallel to the switching elements 48Ta to 48Td, respectively.

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

  On the other hand, when demagnetizing the electromagnetic coil 6M of the riff magnet 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 riff magnet 6A. From the electromagnetic coil 6M to the electromagnetic coil 6M via the commutation diode 48Dc, the DC bus 110, and the commutation diode 48Db. Returning demagnetizing current flows. Therefore, the electromagnetic coil 6M of the riff mug 6A is demagnetized, and the steel material or the like adsorbed on the riff mug 6A can be released. At this time, the inverter 18 </ b> A supplies the motor generator 12 with regenerative power released from the electromagnetic coil 6 </ b> M to the DC bus 110 as a degaussing current.

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

  In the following description, the inverter 18 (inverters 18A and 18B), the step-up / down converter 100, the riff magnet 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 an excavator that is an example of the work machine according to the present embodiment and a riff mag machine that is another example (hereinafter referred to as a work machine series) is common to each work machine. A configuration and a configuration specific to each work machine. The following description will focus on the configuration common to each work machine included in the work machine series including the excavator and the riffmag machine.

  Next, the configuration of the exhaust gas processing device 150 that purifies the 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 the 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 to the exhaust pipe 62 through the turbocharger 61. Then, the exhaust gas flows into the exhaust gas processing device 150 from the exhaust pipe 62, and after being purified by the exhaust gas processing device 150, is exhausted 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 unit and a second exhaust processing unit in series. The first exhaust treatment unit in the present embodiment is a diesel particulate filter (DPF: Diesel Particulate Filter) 66 that collects particulate matter in the exhaust gas. The second exhaust treatment unit is a selective reduction catalyst 67 that reduces and removes NOx in the exhaust gas.

  Note that the first exhaust treatment unit may be a diesel oxidation catalyst (DOC: Diesel Oxidation Catalyst).

  The selective reduction catalyst 67 receives the supply of the liquid reducing agent and removes NOx by 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, other treatment agents other than urea water may be used as long as they 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 the urea water tank 200 via a urea water supply pipe 69 (hereinafter simply referred to as “pipe 69”).

  The pipe 69 is provided with a urea water supply pump 70. 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 into the exhaust pipe 62 from the urea water injection valve 68 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 produced ammonia reduces NOx contained in the exhaust gas within the selective reduction catalyst 67. Thereby, the exhaust gas discharged from the diesel engine 11 is purified.

  The first NOx sensor 72 is disposed on the upstream side of the urea water injection valve 68. The second NOx sensor 73 is disposed on the downstream side 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 arrangement positions.

  A urea water remaining amount sensor 74 is disposed in the urea water tank 200. 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 the exhaust gas controller 75. The exhaust gas controller 75 is configured to inject an appropriate amount of urea water by the urea water injection valve 68 and the urea water supply pump 70 based on the NOx concentrations detected by the first NOx sensor 72 and the second NOx sensor 73, respectively. Take 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 the urea water remaining ratio. For example, the urea water remaining ratio of 50% indicates that urea water 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 an ECM 60 that controls the diesel engine 11 via communication means (for example, a LAN that conforms to the CAN protocol). The ECM 60 is connected to the excavator controller 76 via communication means (for example, a LAN that conforms to the CAN protocol).

  Various types of information of the exhaust gas processing device 150 included in the exhaust gas controller 75 can be shared by the excavator controller 76. Each of the ECM 60, the exhaust gas controller 75, and the excavator 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 processing device 150 has a freeze prevention mechanism that prevents the urea water tank 200 and the pipe 69 from freezing. In the present embodiment, the freeze prevention mechanism uses engine coolant of the diesel engine 11 that passes through the pipe 80. Specifically, the engine coolant 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 80 b is a part of the pipe 80 that contacts the outer surface of the urea water tank 200. The engine cooling water supplies heat to the urea water tank 200 and the urea water in the inside when flowing through the second portion 80b. Thereafter, the engine coolant supplies heat to the pipe 69 and urea water in the pipe 69 when flowing through the third portion 80 c of the pipe 80 installed adjacent to the pipe 69. Thereafter, the engine cooling water that has released heat and 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 manner, 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 in the upper swing body 3 of the work machine (excavator and riff mag machine) according to the present embodiment, that is, each work machine of the work machine series according to the present embodiment ( An arrangement structure common to excavators and riffmag machines will be described.

  FIG. 8 is a plan view illustrating 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 illustrating an example of an arrangement structure of various components in the 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 in the 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 the right front part of the upper swing body 3 of the working machine according to the present embodiment, and FIG. 11 (a) is a perspective view seen from the upper right front, and FIG. ) Represents a perspective view seen from the upper left front. FIG. 12 is a front view showing the 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 swivel frame 140 is centered on a pair of center frames 141 and side frames 142 extending in a longitudinal direction in the longitudinal direction of the upper swivel body 3, and is a cross member that connects other reinforcing frames and each frame in the left-right direction. Etc. are configured.

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

  The side frame 142 includes 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 in the center of the rear part of the upper swing body 3. The diesel engine 11 is assembled to the center frame 141 via an anti-vibration mount (not shown).

  A speed reducer 13 located on the right side of the diesel engine 11 is connected to be able to transmit power, and a motor generator is connected to the side of the speed reducer 13 opposite to the side to which the diesel engine 11 is connected (that is, the right side). 12 is connected so that power transmission is possible. 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 part.

  An exhaust gas processing device 150 is disposed 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 disposed at the left rear portion of the upper swing body 3 (that is, 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 hybrid, a water pump 193, and the like.

  A cabin 10 is disposed on the 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) in a manner 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 It is rotatably supported.

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

  A fuel tank 160 is provided at the center 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 processing device 150). The 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 supported on the front right side of the upper swing body 3 (that is, on the front side and the front center of the fuel tank 160 disposed at the right side central part). On the right side).

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

  As illustrated 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, the filler 202 is lifted and installed at a relatively high position, so that the operator can easily replenish urea water in a state where the filler 202 is lifted up and down as described later. That is, for example, when the filler 202 is installed in the vicinity of the upper end position of the urea water tank 200, the urea is in a state where it goes up to the first step 221 (described later) or the second step 222 (described later) of the ascending / descending step 220. It is necessary to bend down greatly when replenishing water. On the other hand, by lifting the filler 202 to a relatively high position, the operator can reduce the amount of bending when the urea water is replenished, so that it is easy to replenish urea water.

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

  As shown in FIG. 9, the capacitor 19 is disposed on the turning frame 140 (the floor surface 143 thereof) adjacent to the front of the urea water tank 200. Hereinafter, an example of the 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 accommodated in a housing 19 </ b> H having a substantially rectangular parallelepiped outer shape (hereinafter referred to as “capacitor housing”). And the capacitor | condenser housing | casing 19H has the flat-shaped attachment leg 19b extended in the front and back in the four corners, and this attachment leg 19b is attached to the turning frame 140 (the floor surface 143) via the support part 19M. Fixed. Specifically, as shown in FIG. 13, the support portion 19M includes damping rubbers 19Ma and 19Mb, washers 19Mc and 19Md, bolts 19Me, and nuts 19Mf. The laminated body in which the swivel frame 140 (the floor surface 143 thereof), the damping rubber 19Mb, the washer 19Md, the mounting leg 19b, the washer 19Mc, and the damping rubber 19Ma are stacked in this order has through holes in the vertical direction. The bolts 19Me are inserted through the through-holes from the bottom up and the nuts 19Mf fastened to the tips of the bolts 19Me are fastened in the vertical direction.

  In addition, the capacitor | condenser housing | casing 19H has the same physique with the shovel and riff mag machine which are included in the working machine series which concerns on this embodiment. That is, the capacitor housing 19H is shared between the excavator and the riff mag machine. However, the configuration of the capacitor 19 (for example, the number of built-in capacitor cells and the specification of each capacitor cell) may be the same or different between the shovel and the riff mag machine.

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

  Further, as shown in FIG. 8, a work lamp 210 is disposed at the left front end portion of the upper surface 205 </ b> A of the support member 205. The work lamp 210 can visually recognize the irradiating part (light irradiating part) from the outside through a slit part 221F provided in the cover part 221C described later.

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

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

  As shown in FIGS. 8 and 10, the inverter casing 18H and the converter casing 100H are arranged close to the left end of the upper surface 205A of the support member 205. Specifically, the converter housing 100H is disposed at the center in the left-right direction of the upper surface 205A of the support member 205, and the inverter housing 18H is disposed on the left side of the converter housing 100H on the upper surface 205A of the support member 205 (ie, , At the left end of the upper surface 205A). In addition, an area 208a (see FIG. 14) in which other parts having the same physique in plan view as the inverter casing 18H and the converter casing 100H can be arranged at the left end portion of the upper surface 205A of the support member 205. Parts specific to each work machine of the work machine series according to the present embodiment can be arranged in the region 208a of the upper surface 205A adjacent to the right side of the converter housing 100H. For example, in the region 208a, a housing (hereinafter referred to as “a riff mug driver housing”) 48H that houses a riff mug driver 48 (refer to a dotted line frame in FIGS. 8 and 10) that is a part peculiar to the riff mug machine. Can be arranged.

  8 and 9, the inverter casing 18H, the converter casing 100H, and the riff mag driver casing 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 end portions of the inverter casing 18H, the converter casing 100H, and the riff mug driver casing 48H and the urea water tank 200, so that the wire harness connected to the rear end portion It becomes easy to handle the cooling pipe and the like. However, since the work lamp 210 is fixed to the left front end portion of the upper surface 205A of the support member 205 as described above, the front end position of the inverter casing 18H is the front end position of the converter casing 100H or the riffmag driver casing 48H. Be behind. Hereinafter, the configuration of the support member 205 that fixes the inverter casing 18H, the converter casing 100H, and the riffmag driver casing 48H will be described with reference to FIG.

The inverter housing 18H is arranged on the right side of the converter housing 100H on the upper surface 205A of the support member 205, and the parts (life magnet driver housing 48H) peculiar to each working machine in the working machine series according to the present embodiment are on the left side. May be arranged. Further, the left and right positions of the inverter casing 18H and the converter casing 100H may be reversed. Further, the inverter casing 18H and the converter casing 100H are arranged at the left end portion or the right end portion of the upper surface 205A of the support member 205, and the parts (life magnet driver casing 48H unique to each work machine in the work machine series according to the present embodiment are arranged. ) May be arranged at the center of the upper surface 205A in the left-right direction. Further, 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 that fixes the work lamp 210 is provided at the left front end portion of the upper surface 205 </ b> A of the support member 205. The fixing portion 209 includes a region 209a in which the work lamp 210 is disposed, and two fastening holes 209b at the front and rear. A fixing portion 206 for fixing the inverter casing 18H is provided behind the fixing portion 209 at the left end portion 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 a total of four fastening holes 206b, two front and two rear.

  In addition, a fixing portion 207 for fixing the converter casing 100H is provided at the center in the left-right direction of the upper surface 205A of the support member 205. Fixing portion 207 includes a region 207a in which converter housing 100H is disposed, and a total of four fastening holes 207b, two front and two rear.

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

As described above, in order to arrange the inverter casing 18H, the converter casing 100H, and the riffmag driver casing 48H as close as possible to each other, the fixing portions 207 and 208 are fixed to the fixing portion 206.
It is provided near the front.

  Thus, the inverter casing 18H and the converter casing 100H are arranged side by side on the upper surface 205A of the support member 205. The upper surface 205A of the support member 205 is provided with a fixing portion 208 that can further arrange and fix a part (a riff mug driver casing 48H) peculiar to each work machine of the work machine series according to the present embodiment. Thereby, the arrangement structure of the right front part of the upper swing body 3 can be shared between the excavator and the riff mag machine included in the work machine series according to the present embodiment. Further, since the support member 205 has the same physique (at least in the left-right direction and the front-rear direction) between the excavator and the riffmag machine included in the work machine series according to this embodiment, the components of the support member 205 are the same. Can be shared. The support member 205 is provided separately from a frame (house frame) (not shown) that constitutes the main house portion of the upper swing body 3. Therefore, the house frame can be shared between the excavator and the riffmag machine.

  The converter casing 100H may be disposed at a place other than the upper surface 205A of the support member 205. That is, the fixing portion 207 on the upper surface 205A is omitted, and in the excavator, the inverter casing 18H is fixed to the fixing portion 206. In the riff mag machine, the inverter casing 18H and the riff mag driver casing are respectively connected to the fixing portion 206 and the fixing portion 208. The aspect to which the body 48H is fixed may be sufficient. In this case, for example, in common with the work machine series according to the present embodiment, a small capacitor is employed instead of the capacitor 19, and the small capacitor (housing housing) is provided on the floor surface 143 below the upper surface 205 </ b> A. 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 through the step-up / 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 for the wire harnesses 31 and 32 in the inverter casing 18H (connectors to the wire harnesses 31 and 32) are arranged in the longitudinal direction of the substantially rectangular parallelepiped outer shape of the inverter casing 18H (hereinafter simply referred to as “the length of the inverter casing 18H”). It is provided on the side surface (that is, the rear end surface) of the rear end.

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

  As shown in FIG. 8, the wire harness 31 extending rearward from the inverter 18 is bent rightward in order 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. It is arranged in an extended manner. As shown in FIGS. 9 and 10, the wire harness 31 is bent downward at a position on the right side of the right end of the urea water tank 200, and is below the floor surface 143 through a hole (not shown) provided in the floor surface 143. To penetrate. The wire harness 31 penetrating under the floor surface 143 is bent rearward and routed along the inside of the side frame 142R in such a manner as to vertically traverse the bottom of the fuel tank 160 from front to back. The wire harness 31 passes through the hole (not shown) provided in the floor surface 143 at a position behind the rear end of the fuel tank 160 and is bent to the right to be bent to the right side. Is connected to the motor generator 12 arranged on the right rear side.

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

  Cooling water is supplied from the radiator 192 to the electric drive parts. Such cooling water circulates through a cooling water passage (water jacket) provided in the inverter casing 18H, the converter casing 100H, and the capacitor casing 19H. Further, in the riffmag machine equipped with the riffmag driver 48, the cooling water further circulates through a water jacket provided in the riffmag driver casing 48H. Thereby, the inverter 18, the buck-boost converter 100, the capacitor 19, and the riff magnet driver 48 can be cooled. Hereinafter, with reference to FIG. 15, a cooling system for the electric drive component will be described.

  FIG. 15 is a diagram showing an example of a cooling system that cools the motor generator 12, the turning electric 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 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 constituted by the cooling pipe 194. Specifically, as shown in FIG. 14, the water pump 193 sucks the cooling water cooled by the radiator 192 through the cooling pipe 194a and discharges it to the cooling pipe 194b.

  The cooling water discharged by the water pump 193 is a cooling pipe disposed adjacent to the capacitor 19, the inverters 18 </ b> A and 18 </ b> B, the step-up / down converter 100, the turning electric motor 21, the motor generator 12, and the speed reducer 13. After passing 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 connecting portion 196 (for example, a fluid coupling or the like) capable of diverting the cooling water, and the cooling water of the cooling pipe 194c can be supplied to a plurality of devices in parallel. In this example, the connecting portion 196 is configured to be able to divert the cooling water of the cooling pipe 194c into three cooling pipes 194d to 194f, of which the cooling pipe 194d is connected to the inverters 18A and 18B (that is, in the inverter casing 18H). The cooling pipe 194e is connected to the step-up / down converter 100 (that is, the water jacket in the converter housing 100H). In the riff mag machine, the cooling pipe 194f is connected to the riff mag driver 48 (that is, the water jacket in the riff mag driver casing 48H). The cooling water that has passed through the inverter casing 18H and the converter casing 100H (in the riff mag machine, the cooling water that has passed through the inverter casing 18H, the converter casing 100H, and the riff mag driver casing 48H) is rejoined at the connection portion 197. Thereafter, the motor 21 for rotation, the motor generator 12, and the speed reducer 13 are circulated through the cooling pipe 194 in this order, and then returned to the radiator 192.

  Note that the configuration of the cooling circuit shown in FIG. 15 is an example, and any connection method may be employed. For example, in FIG. 15, the water pump 193 may suck in the cooling water before being cooled by the radiator 192 and discharge it to the radiator 192. The cooling pipes 194 are arranged in parallel at portions adjacent to the inverters 18A and 18B and the step-up / down converter 100 (in the riff mag machine, the inverters 18A and 18B, the step-up / down converter 100 and the riff mag driver 48). In this part, they 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, the cooling pipe 194 b extending from the water pump 193 disposed adjacent to the left side of the radiator 192 is vertically bent under the radiator 192 in the front-rear direction, then bent rightward, and the radiator 191. Or the diesel engine 11 is routed in such a manner as to traverse the front from left to right. The cooling pipe 194b is bent forward in front of the fuel tank 160, and is routed along the fuel tank 160 and the urea water tank 200 in a longitudinal direction from the rear to the front. Connected. A connection portion 196 to which a cooling pipe 194c (not shown) extending from the rear end surface of the capacitor housing 19H is connected is disposed at a front-rear position between the urea water tank 200, the inverter housing 18H, and the converter housing 100H. The The connection portion 196 and each of the inverter housing 18H and the converter housing 100H are connected by cooling pipes 194d and 194e. Further, in the riffmag machine, the connection portion 196 and the riffmag driver casing 48H are connected by a cooling pipe 194f (dotted line in FIG. 8).

  In FIG. 8, although illustration of the connecting portion 197 is omitted, the arrangement of the connecting portion 197, the connecting portion 197, the inverter casing 18H, and the converter casing 100H (in the riff mag machine, the inverter casing 18H, the converter casing 197) are omitted. The connection mode with the body 100H and the riff mug driver housing 48H) is the same as that of the connection portion 196.

  As described above, the circulation path of the cooling system for the electric drive component 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. . And it has the connection part 196 which can be connected with the cooling pipe 194f arrange | positioned in parallel with the cooling pipe 194d and the cooling pipe 194e, and is connected to the riff mug driver housing | casing 48H. Thereby, it is possible to share the cooling system of the electric drive parts between the excavator and the riffmag machine included in the work machine series according to the present embodiment.

  As shown in FIGS. 9, 11, and 12, there are various parts groups (a urea water tank 200, an inverter 18, a capacitor 19, a step-up / down converter 100, a riff mug driver 48, a work) An elevating step 220 is provided so as to cover the lamp 210 and the like. The ascending / descending step 220 is provided rearwardly, and the operator can ascend from the front of the upper swing body 3 to the upper part of the house, and perform an inspection of the engine room or the like. The lifting 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, and the operator goes up to the lifting step 220 and enters the urea water tank 200 into the urea water tank 200. Can be replenished. The raising / lowering step 220 includes a first step 221, a second step 222, and a third step 223 from the bottom.

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

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

  The opening 221 </ b> B is provided for the operator to maintain the electric drive parts and the work lamp 210 accommodated in the first step 221. For example, as shown in FIG. 10, the capacitor casing 19H is provided with a safety switch cover 19s. Since the capacitor 19 can output a very high voltage, when the maintenance of the electric drive system including the capacitor 19 is performed, it is necessary to remove the safety switch cover 19s and cut off the power path by the safety switch. In addition, the work lamp 210 needs to be replaced when the light bulb stops lighting due to a lifetime or the like. At that time, the operator can access both the safety switch cover 19s and the work light through the opening 221B (dotted line frame in FIG. 10). Therefore, an increase in cost can be suppressed as compared with a case in which a maintenance cover for the electric drive parts and a maintenance cover for the work lamp 210 are provided separately.

  In addition, as shown in FIG. 7, the opening 221B is provided in such a manner that the maintenance target part (safety switch cover 19s) of the capacitor 19 and the maintenance target part (irradiation part) of the work lamp can be viewed from the front. It is done. Therefore, the worker can easily perform maintenance of both the electric drive component and the work lamp 210.

  The opening 221 </ b> B only needs to be accessible to the maintenance target part (safety switch cover 19 s) of the capacitor 19 and the maintenance target part (irradiation part) of the work lamp 210, and each maintenance target part cannot be visually recognized from the front. Also good. That is, the opening 221 </ b> B may be provided in such a manner that any one of the maintenance target portions can be visually recognized from the front, or may be provided in an invisible manner.

  The first step 221 includes a cover part 221C that covers the opening 221B from the front. The cover portion 221C is configured to be removable from the first step 221 (see the white arrow in FIG. 9), and in addition to the front end surface of the first step step body 221A provided with the opening 221B, an opening 221B is provided. It is provided in such a manner as to cover the upper surface that is not possible. That is, the cover portion 221C overlaps the upper surface (the portion on which the operator puts his / her foot) of the first step 221 (specifically, the first step step main body 221A). Accordingly, since the load from above can be supported by the upper surface of the first step step main body 221A and the upper surface of the cover portion 221C, the plate thickness of the first step step main body 221A and the plate thickness of the cover portion 221C can be reduced. Can be thinned. Therefore, the weight of the first stage step body 221A can be reduced, and the burden on the operator in the assembly process can be reduced. In addition, the weight of the cover portion 221C can be reduced, the burden on the worker in the assembly process can be reduced, and the burden on the worker in the maintenance work can be reduced. The weight of the cover portion 221C has a mass not more than a predetermined value that can be carried by the operator, for example, a mass not more than 15 kg.

  Further, as described above, the inverter 18 and the buck-boost converter 100 are housed in different inverter casings 18H and converter casings 100H, respectively, and are arranged side by side. Further, as described above, in the riff mag machine, the inverter 18, the buck-boost converter 100, and the riff mag driver 48 are accommodated in different inverter casings 18H, converter casings 100H, and riff mag driver casings 48H. Are arranged side by side. Thereby, since it becomes possible to suppress the height as the whole electric drive component comparatively low, the height of the part which covers an electric drive component among the raising / lowering steps 220 can be suppressed low. Therefore, for example, the step of the portion covering the electric drive component is increased, and there is no need to add a step with a short front and rear dimension to the front portion of the step, and the portion covering the electric drive component is used as the first step 221. can do. That is, the lifting step 220 can be easily lifted and lowered. Further, by adopting a configuration in which the inverter casing 18H, the converter casing 100H, and the riff mug driver casing 48H can be arranged side by side on the upper surface 205A of the support member 205, both the excavator and the riff mug machine have the same good house upper portion. The ability to get on and off can be realized.

  In addition, although the cover part 221C is provided in the aspect which can be removed, for example, like the cover part 222C and 223C mentioned later, you may provide in the aspect which can be rotated centering | focusing on a rear-end part.

  Moreover, as shown in FIG.11 and FIG.12, the cover part 221C is provided with the slit part 221F. As shown in FIG. 12, the slit portion 221 </ b> F is provided in the same vertical and horizontal positions as the work lamp 210 with the cover portion 221 </ b> C attached to the first step step main body 221 </ b> A. That is, the irradiation part of the work lamp 210 is visible from the front through the slit part 221F in a state where the cover part 221C is attached to the first stage step body 221A.

  The slit portion 221F that allows light from the irradiation portion of the work lamp 210 to pass forward is provided at the upper end portion of the front end surface of the first step 221 (specifically, the cover portion 221C). That is, the work lamp 210 is provided on the upper surface 205A of the support member 205 raised from the floor surface 143 on which the capacitor housing 19H is disposed. Therefore, it becomes possible to make it difficult for the light irradiated forward from the slit part 221F to be blocked by the step 145 provided at the front end of the turning frame 140, and the work lamp 210 can reliably irradiate the ground in front of the excavator. it can. Further, since the work lamp 210 is provided at the left front end portion of the upper surface 205A of the support member 205, it is possible to 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.

  Moreover, the slit part 221F is comprised so that an operator can hold | grip, for example by attaching a protective material to an edge part. Thereby, there is no need to provide a dedicated gripping part on the cover part 221C, and an increase in cost, an increase in mass, etc. can be suppressed.

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

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

  As shown in FIG. 9, the second stage step 222 includes a work box 222A disposed at the rear of the upper surface of the first stage step 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 accommodating, for example, an automatic greasing device or tool including a grease pail can, an electric pump, and a grease gun.

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

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

  As shown in FIG. 9, the third stage step 223 includes a third stage step body 223A that covers the urea water tank 200, the filler pipe 201, and the filler 202 from the front and the upper side. The third step step 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 step 222), and also includes a cover portion 223C that covers the opening 223B. As shown in FIG. 9, the cover portion 223 </ b> C is provided so as to be rotatable about the rear end portion.

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

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

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

  Further, as described above, since the filler 202 is shifted in the left-right direction from the fuel gauge 161, as shown in FIG. 11, the third step 223 (specifically, at the same height as the fuel gauge 161). The right end of the third step step body 223 </ b> A) is on the left side of the left / right position of the fuel gauge 161. That is, the third stage step 223 (third stage step main body 223A) is arranged closer to the left side than the fuel gauge 161, and the fuel gauge 161 is inserted through the space between the third stage step 223 and the exterior cover 230. Visible 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 step 223 is provided at the right end of the third step step body 223A. The scaffold member 224 is provided so as to cover the space between the third step step body 223A and the exterior cover 230 from above. Therefore, by providing a space between the third step step main body 223A and the exterior cover 230, it is possible to prevent inconveniences such as a narrow width on which an operator's feet are placed. That is, by providing the scaffold member 224, it is possible to prevent a decrease in convenience when the operator uses the lifting step 220.

  Further, as shown in FIG. 11 (b), the scaffold member 224 is provided with a slit portion in the front-rear direction, and the lower portion can be visually recognized from above the scaffold member 224 through the slit portion. . Therefore, the operator can visually recognize the fuel gauge 161 from above obliquely through the slit portion and the space between the third step step main body 223A and the exterior 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 step body 223A. That is, the scaffold member 224 is fixed to the upper end of the right side surface of the third step step body 223A. Therefore, it is possible to prevent a situation in which the fixing structure of the scaffold member 224 blocks the front of the fuel gauge 161, and to ensure visibility of the fuel gauge 161 (specifically, visibility from the front).

  Also, as shown in FIG. 12, in order to ensure the strength of the joint between the scaffold member 224 and the right side surface of the third step step body 223A, the thickness (dimension in the vertical direction) of the scaffold member 224 is third. It is set to increase as it approaches the stepped step body 223A. That is, the thickness of the scaffold member at the joint portion with the third step step body 223A is set to be 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 from obliquely above, instead of the slit portion.

  As mentioned above, although the form for implementing this invention was explained in full detail, this invention is not limited to this specific embodiment, In the range of the summary of this invention described in the claim, various Can be modified or changed.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 1A, 1B Hydraulic motor 2 Turning mechanism 3 Upper turning body (rotating 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 Reduction gear 14 Main pump 15 Pilot pump 16 High pressure hydraulic line 17 Control valve 18, 18A, 18B Inverter 18H Housing (first housing)
19 Capacitor 19b Mounting leg 19H Housing 19M Supporting part 19s Safety switch cover 21 Turning electric motor (electric motor)
DESCRIPTION OF SYMBOLS 22 Resolver 23 Mechanical brake 24 Turning reduction gear 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 Adsorption switch 44 Release switch 48 Riffmag driver 48H Housing ( (3rd housing)
69 Urea water supply piping 100 Buck-boost 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 power storage system 140 turning frame 141 center frame 141L left side frame 141R right side frame 142, 142L, 142R side frame 143 floor surface 145 step 150 exhaust gas processing Device 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 channel)
194e Cooling pipe (second cooling water channel)
194f Cooling pipe (third cooling water channel)
195 Reserve tank 196, 197 Connection portion 200 Urea water tank 201 Filler pipe 202 Filler 205 Support member 205A Upper surface (fixing plate)
206 fixing part (first fixing part)
206a region 206b fastening hole 207 fixing part (second fixing part)
207a area 207b fastening hole 208 fixing part (third fixing part)
208a area 208b fastening hole 209 fixing part 209a area 209b fastening hole 210 work lamp 220 elevating step 221 first step step 221A first step step body 221B opening 221C cover part 221D foot rest part 221F slit part 222 second step step 222A work Box 222B Opening 222C Cover 222D Foot rest 223 Third step step 223A Third step main body 223B Opening 223C Cover 223D Foot rest 224 Scaffolding member 230 Exterior cover 240 Inner cover

Claims (5)

A swivel,
An electric motor,
A power storage device mounted on the right front of the revolving structure;
An inverter mounted on the right front of the swivel body in a state of being accommodated in the first housing, and disposed on a power path between the power storage device and the motor;
A converter mounted on the 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 that is fixed to a revolving frame on a right front portion of the revolving structure and includes 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 swivel body in a manner to cover the power storage device, the first housing, the second housing, and the support member,
The first casing and the second casing are arranged side by side on the fixing plate, and a third casing different from the first casing and the second casing can be further arranged and fixed. A fixing part is provided,
Work machine. Lifting magnet,
A lift magnet driver provided in a power path between the power storage device and the lifting magnet,
The riff mug driver is housed in the third casing and fixed to the third fixing portion.
The work machine according to claim 1. A circulation path for supplying cooling water to the first casing and the second casing;
The circulation path includes a first cooling water path connected to the first casing, a second cooling water path arranged in parallel with the first cooling water path and connected to the second casing, The first cooling water channel and the second cooling water channel are arranged in parallel, and has a connection part capable of connecting a third cooling water channel connected to the third housing,
The work machine according to claim 1 or 2. The support member is provided separately from the house frame of the swivel body,
The work machine according to any one of claims 1 to 3. A series of work machines with excavators and riff mag machines,
The excavator and the riffmag machine are
An electric motor, a power storage device mounted on the right front portion of the revolving structure, and a power storage device mounted on the right front portion of the revolving structure in a state of being accommodated in the first housing, on a power path between the power storage device and the motor Mounted on the right front part of the swivel body in a state of being 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 converter, a first fixing part fixed to the turning frame at the right front part of the turning body, the first casing being fixed, and a second fixing part fixing the second casing. A support member having a fixing plate, and an elevating step provided at the right front portion of the swivel body in a manner to cover the power storage device, the first housing, the second housing, and the support member. Prepared,
In the fixed plate, the first housing and the second housing are arranged side by side in common with the excavator and the riffmag machine, and a third different from the first housing and the second housing. A third fixing part is provided, which can be further arranged and fixed;
In the riffmag machine, a riffmag 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.
Series of work machines.

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