JP2017071246A - Shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shovel that can relatively easily be attached or detached in a case where an electric drive component and a liquid reductant tank storing a processing agent to be supplied to the exhaust gas processing device of a diesel engine are integrally arranged in the right front part of the upper revolving body.SOLUTION: A shovel comprises: an upper revolving body; a cabin provided in the left front part of the upper revolving body; a diesel engine mounted in the rear part of the upper revolving body; an electric motor mounted in the rear part of the upper revolving body adjacent to the diesel engine; an electric drive component mounted in the right front part of the upper revolving body and configured to drive the electric motor; an exhaust gas processing device that processes exhaust gas from the diesel engine by using a processing agent; and a storage tank mounted in the right front part of the upper revolving body adjacent to the electric drive component, and storing a processing agent. The electric drive component and the storage tank compose an integrally detachable sub-module via a support member 240 mounted on the frame 3a of the upper revolving body.SELECTED DRAWING: Figure 15

Description

  The present invention relates to an excavator including an exhaust gas processing device that processes engine exhaust gas using a processing agent (urea aqueous solution).

  2. Description of the Related Art Conventionally, a hybrid excavator including an electric motor (assist motor) that assists an engine that is a driving force source of a hydraulic pump and an electric motor (rotation motor) that drives an upper swing body to rotate is known.

  In addition to the configuration of the excavator that uses only the engine as a power source, the hybrid type excavator drives the electric motor using the above-described electric motor, an electric storage device that supplies electric power to the electric motor, and electric power supplied from the electric storage device A drive device (for example, an inverter or a converter) is included. Here, the hybrid type excavator usually has a relatively large volume, since it often follows the structure of the excavator that uses only the engine as a power source and adds an electric motor, a power storage device, a driving device, and the like. It is necessary to secure a place for additionally mounting a power storage device and a driving device (hereinafter referred to as an electric driving component) in the upper swing body.

  In response to such a demand, for example, an electric drive component additionally mounted on the right front portion of the upper swing body (opposite side of the cabin at the front portion of the upper swing body) has been proposed (for example, Patent Document 1). reference).

  In addition, the excavator is often equipped with a diesel engine as a power source. In recent years, diesel engines are required to comply with higher-order exhaust gas regulations, and therefore, an exhaust gas processing device that complies with such higher-order exhaust gas regulations is installed.

  As such an exhaust gas processing apparatus, a urea selective reduction type NOx processing apparatus using a urea aqueous solution (liquid reducing agent) as a processing agent is often used. An aqueous urea solution (hereinafter simply referred to as “urea water”) is stored in a liquid reducing agent tank, and the liquid reducing agent tank is connected to an exhaust pipe by a liquid reducing agent supply pipe. The urea water in the liquid reducing agent tank is supplied to the exhaust pipe of the diesel engine by the liquid reducing agent supply pump (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 2014-84643 JP 2013-160005 A

  By the way, when mounting an exhaust gas treatment device on a hybrid type excavator, in addition to the place where electric drive parts necessary for hybridization are mounted, following the structure of the excavator that uses only a diesel engine as a power source, It is necessary to secure a place for additionally mounting an exhaust gas treatment device, in particular, an accompanying relatively large volume liquid reducing agent tank in the upper swing body.

  Usually, from the center part to the rear part of the upper revolving structure, main components such as a fuel tank, a hydraulic oil tank, a diesel engine, and a cooling unit that are also mounted on a shovel that uses only the engine as a power source are arranged. Therefore, the electric drive parts necessary for hybridization and the liquid reductant tank necessary for mounting the exhaust gas treatment device are located at the right front part of the upper swing body as in the electric drive parts described in Patent Document 1. It is possible to arrange.

  However, when an electric drive part and a liquid reducing agent tank are arranged in the right front part of the upper swing body, the time required for the assembly process of the right front part of the upper swing body becomes longer, and it may not be possible to fit within the predefined assembly time. There is sex. In addition, when performing maintenance of the electric drive parts and the liquid reducing agent tank, depending on the arrangement of these parts, it may take a very long work time to remove the electric drive parts and the liquid reducing agent tank.

  Accordingly, in view of the above problems, an electric drive component such as a power storage device or a drive device and a liquid reducing agent tank for storing a treatment agent to be supplied to an exhaust gas treatment device for treating exhaust gas of a diesel engine are provided on the right side of the upper swing body. It is an object of the present invention to provide an excavator in which an electric drive component and a liquid reducing agent tank can be attached and detached relatively easily when they are arranged in a unit.

In order to achieve the above object, in one embodiment, the excavator is:
An upper swing body,
A cabin provided at a left front portion of the upper swing body,
A diesel engine mounted at the rear of the upper swing body,
An electric motor mounted on the rear of the upper rotating body adjacent to the diesel engine and assisting the diesel engine;
An electric drive part mounted on the right front part of the upper swing body and driving the electric motor;
An exhaust gas treatment device for treating the exhaust gas of the diesel engine using a treatment agent;
Mounted on the right front of the upper rotating body adjacent to the electric drive component, and having a storage tank for storing the processing agent,
The electric drive component and the storage tank constitute a sub-module that can be attached and detached as a unit through a support member attached to the frame of the upper swing body.

  According to the above-described embodiment, the liquid reductant tank that stores the electric drive components such as the power storage device and the drive device, and the treatment agent supplied to the exhaust gas treatment device that treats the exhaust gas of the diesel engine is provided on the right side of the upper swing body. In the case where the electric drive parts and the liquid reducing agent tank are arranged in a concentrated manner at the front part, it is possible to provide an excavator in which the electric drive component and the liquid reducing agent tank can be attached and detached relatively easily.

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 figure which shows the structure of an exhaust-gas processing apparatus. It is the perspective view which looked at the urea water tank from diagonally upper right front. It is the disassembled perspective view which looked at the urea water tank from the diagonally upper left front. It is the perspective view which looked at the urea water tank from the diagonally lower left front. It is a top view of the upper turning body which shows the 1st example of arrangement | positioning of the electric drive component and urea water tank which concern on this embodiment. It is a right view of the upper turning body which shows the 1st example of arrangement | positioning of the electric drive components and urea water tank which concern on this embodiment. It is a top view explaining an example of the attachment or detachment structure of the electric drive components and urea water tank shown in FIG. 8, FIG. FIG. 10 is a side view for explaining an example of a structure for attaching and detaching the electric drive component and the urea water tank shown in FIGS. It is a top view of the upper turning body which shows the 2nd example of arrangement | positioning of the electric drive components and urea water tank which concern on this embodiment. It is a right view of the upper turning body which shows the 2nd example of arrangement | positioning of the electric drive components and urea water tank which concern on this embodiment. It is a top view explaining an example of the attachment or detachment structure of the electric drive component and urea water tank shown in FIG. 12, FIG. It is a side view explaining an example of the attachment or detachment structure of the electric drive components and urea water tank shown in FIG. It is sectional drawing which shows an example of the structure of the support part which fixes an electrical storage apparatus to a flame | frame. It is a top view of the upper revolving structure which shows the 3rd example of arrangement of the electric drive parts and urea water tank concerning this embodiment. It is a right view of the upper turning body which shows the 3rd example of arrangement | positioning of the electric drive components and urea water tank which concern on this embodiment. It is a top view explaining an example of the attachment or detachment structure of the electric drive components and urea water tank shown in FIG. It is a top view of the upper revolving structure which shows the 4th example of arrangement of the electric drive parts and urea water tank concerning this embodiment. It is a right view of the upper turning body which shows the 4th example of arrangement | positioning of the electric drive component and urea water tank which concerns on this embodiment. It is a top view explaining an example of the attachment or detachment structure of the electric drive components and urea water tank shown in FIG. 20, FIG. It is a top view of the upper revolving body which shows the modification of arrangement of the electric drive parts and urea water tank concerning this embodiment. It is a right view of the upper revolving structure which shows the modification of arrangement | positioning of the electric drive components and urea water tank which concern on this embodiment.

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

  First, the basic configuration of the hybrid excavator according to the present embodiment will be described with reference to FIGS.

  FIG. 1 is a side view showing an excavator 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 boardes, and a diesel engine 11 (see FIG. 8 and the like) described later and the like are mounted.

  In the present specification, the “front portion” of the upper swing body 3 means a portion on the side where the boom 4 is attached as viewed from the center of the upper swing body 3. Further, “front” means a direction in which the boom 4 extends as viewed from the center of the upper swing body. Further, “left side” means a portion that becomes the left when facing the front (the direction in which the boom 4 extends) in the upper swing body 3. Further, the “right side” means a portion that is on the right when facing the front (the direction in which the boom 4 extends) in the upper swing body 3.

  FIG. 2 is a block diagram showing the configuration of the excavator drive system. 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 hybrid excavator according to this 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. A control valve 17 is connected to the main pump 14 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 control valve 17 is a control device that controls the hydraulic system in accordance with an operation on the operation device 26. The hydraulic motors 1A (for right) and 1B (for left), the boom cylinder 7, the arm cylinder 8, and the bucket cylinder 9 for the lower traveling body 1 are connected to the control valve 17 via a high-pressure hydraulic line.

  The motor generator 12 is connected to a power storage system 120 including a power storage device 19 (see FIG. 3) via an inverter 18A. An operation device 26 is connected to the pilot pump 15 through a pilot line 25. 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.

  The power storage device 19 is, for example, a capacitor. The power storage device 19 may be any secondary battery (for example, a lithium ion battery).

  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 casing. 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 in the hybrid excavator. The controller 30 is composed of 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 into a speed command, and performs drive control of the turning electric motor 21. Note that the signal supplied from the pressure sensor 29 is a signal representing an operation amount in the operating device 26 for turning the turning mechanism 2.

  In addition, the controller 30 performs operation control of the motor generator 12 (switching between electric (assist) operation or power generation operation) and also drives the buck-boost converter 100 (see FIG. 3) to store the power storage device 19 (FIG. 3). Charge / discharge control). The controller 30 is a step-up / down converter based on the state of charge of the power storage device 19, the operation state of the motor generator 12 (electric (assist) operation or power generation operation), and the operation state of the turning motor 21 (power running operation or regenerative operation). Switching control of the step-up operation and step-down operation of 100 is performed, and thereby charge / discharge control of the power storage device 19 is performed.

  FIG. 3 is a circuit diagram of the power storage system 120. The power storage system 120 includes a power storage device 19, a step-up / down converter 100, a DC bus 110, and the like. The DC bus 110 controls transmission and reception of electric power among the power storage device 19, the motor generator 12, and the turning electric motor 21. The power storage device 19 is provided with a voltage detection unit 112 and a current detection unit 113 for detecting the voltage value and current value of the power storage device 19. The voltage value and current value of the power storage device 19 detected by the voltage detection unit 112 and the 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 voltage value of the DC bus 110 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 step-up / down converter 100, and the power storage device 19, the motor generator 12, and the turning electric motor 21 exchange power via the DC bus 110. .

  The switching control between the step-up / step-down operation of the step-up / down converter 100 is performed by detecting the voltage value of the DC bus 110 detected by the DC bus voltage detection unit 111, the voltage value of the power storage device 19 detected by the voltage detection unit 112, and current detection. This is performed based on the current value of power storage device 19 detected by unit 113.

  Hereinafter, the inverter 18 (inverters 18A and 18B), the buck-boost converter 100, and the power storage device 19 may be collectively or individually referred to as “electrically driven components”.

  Next, with reference to FIG. 4, the structure of the exhaust-gas processing apparatus 150 which processes the exhaust gas discharged | emitted from the diesel engine 11 is demonstrated.

  FIG. 4 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 intercooler 65 included in the turbocharger 61 and the cooling unit 190 (see FIG. 8 and the like) 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 excavator controller 76 may be the same as the controller 30.

  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 has reached a relatively low temperature passes through the fourth portion 80d of the pipe 80 and reaches the cooling unit 190A (a radiator or the like). 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, details of the urea water tank 200 will be described with reference to FIGS. 5-7 is a figure which shows an example of the specific structure of the urea water tank 200. FIG. FIG. 5 is a perspective view of the urea water tank 200 as viewed from the upper right and front, and FIG. 6 is an exploded perspective view of the urea water tank 200 with the filler 230 removed from the upper left and the front. FIG. 7 is a perspective view of the urea water tank 200 as viewed from the lower left front side.

  In the following description, the front side (the arrow X2 direction side in the figure) close to the worker side during the urea water replenishment operation of the urea water tank 200 is the front, and the back side (arrow X1 direction side in the figure) is the rear. . In addition, the direction indicated by the arrow Y1 in the figure orthogonal to the front-rear direction is the left, and the direction indicated by the arrow Y2 is the right.

  The urea water tank 200 is made of resin and has a tank body 200a having a substantially rectangular cross section and a substantially box shape as a whole. An inclined surface 200b is formed in the upper front portion of the tank body 200a. The inclined surface 200b is inclined so as to approach the rear side as it goes upward.

  The inclined surface 200b is provided with a liquid supply port 200d (see FIG. 6). A filler 230 is detachably attached to the liquid supply port 200d. The urea water is supplied into the tank body 200a from the liquid supply port 200d through the filler 230 at the time of supply.

  Further, a level gauge 228 is provided on the inclined surface 200b. The level gauge 228 displays the level (liquid level height) of urea water in the tank body 200a. The operator can prevent the urea water from overflowing by replenishing the urea water while looking at the level gauge 228 during the urea water replenishment process.

  A concave portion 200c is formed on the right side of the inclined surface 200b. The concave portion 200c functions as a grip portion (handle) when the urea water tank 200 is attached to and detached from the tank reinforcing member 215.

  A drain plug 211 is provided at the bottom of the urea water tank 200 (see FIG. 7). The drain plug 211 is a plug that is removed when the urea water remaining in the urea water tank 200 is drained.

  A filler 230 is attached to the urea water tank 200. The filler 230 guides urea water to the liquid supply port 200d of the urea water tank 200 during replenishment. The filler 230 includes a filler body 230a, a filler tube 233, a filler cap 235, and the like.

  The filler body 230a is a cylindrical member, and is formed of metal or other material (for example, resin). The filler main body 230a is attached to the filler bracket 231 by welding or adhesion. Specifically, the cylindrical filler main body 230 a is fixed to the filler bracket 231 at a substantially central position. Therefore, in a fixed state, one end of the filler body 230a protrudes outside the filler bracket 231 to form an outer protrusion, and the other end protrudes inward to form an inner protrusion.

  A screw is formed on the outer periphery of the outer protrusion of the filler body 230a. The filler cap 235 is detachably attached to the outer protrusion of the filler body 230a.

  One end of a filler tube 233 is attached to the inner protrusion of the filler body 230a. The other end of the filler tube 233 is attached to the liquid supply port 200 d of the urea water tank 200.

  Thus, the filler 230 is attached to the urea water tank 200 using the filler bracket 231. The filler bracket 231 is a plate-like member and is formed of metal or other material (for example, resin).

  Further, the urea water tank 200 is formed with an upper attachment portion 200e and a lower attachment portion 200f. The upper mounting portion 200e is formed on the upper surface portion of the tank body 200a. The lower attachment portion 200f is formed below the liquid supply port 200d on the inclined surface 200b.

  A screw hole 200h is formed in the upper attachment portion 200e and the lower attachment portion 200f. The position of each screw hole 200h is configured to correspond to the position of the filler mounting bolt 232 when the filler bracket 231 is attached to the urea water tank 200.

  The filler bracket 231 is fixed to the urea water tank 200 by screwing the filler mounting bolts 232 into the screw holes 200h of the mounting portions 200e and 200f, whereby the filler 230 is also attached to the urea water tank 200.

  The urea water is replenished in a state where the filler 230 is attached to the urea water tank 200. In order to replenish urea water, the filler cap 235 is removed from the filler main body 230a, and urea water is injected from the outer end of the filler main body 230a. Thereby, urea water is replenished to the urea water tank 200 through the filler tube 233.

  The resin-made urea water tank 200 configured as described above is stored in the tank storage container 212. The tank storage container 212 includes a tank reinforcing member 215 and a tank bracket 226.

  As shown in FIGS. 5 to 7, the tank reinforcing member 215 includes a side reinforcing plate 215 </ b> A, an upper reinforcing plate 215 </ b> B, a tank mounting plate 215 </ b> C, and the like. The side reinforcing plate 215A, the upper reinforcing plate 215B, and the tank mounting plate 215C are formed of, for example, a metal material such as iron or another material (a material having higher strength than the material of the urea water tank 200).

  The side reinforcing plate 215A extends in the vertical direction (Z1 and Z2 directions in the figure) and has an L shape in plan view. The side reinforcing plates 215 </ b> A are disposed at positions facing the four corners of the urea water tank 200 and hold the four corner positions of the urea water tank 200.

  The upper reinforcing plate 215B connects the upper portions of the adjacent side reinforcing plates 215A. Thereby, the upper part of the side reinforcing plate 215A is fixed by the upper reinforcing plate 215B.

  The tank mounting plate 215C is a base on which the urea water tank 200 is mounted. Further, the lower end of the side reinforcing plate 215A is fixed to the tank mounting plate 215C.

  A plug opening 215E is formed in the tank mounting plate 215C. When the urea water tank 200 is attached to the tank reinforcing member 215, the drain plug 211 is inserted into the plug opening 215E and protrudes downward from the lower surface of the tank mounting plate 215C.

  A lower reinforcing plate 215D is disposed on the lower surface of the tank mounting plate 215C. The lower reinforcing plate 215D is provided so as to extend in the longitudinal direction of the tank mounting plate 215C (in the directions of arrows Y1 and Y2 in FIG. 5). The lower reinforcing plate 215D is fixed to a fixed member (a protective cover 240 to be described later) of the upper swing body 3 by using a fixing bolt 215Db, whereby the tank reinforcing member 215 is attached to the upper swing body 3 (the protective cover 240). Fixed.

  The plates 215 </ b> A to 215 </ b> D constituting the tank reinforcing member 215 can be joined using, for example, welding.

  The tank bracket 226 is attached to the upper part of the urea water tank 200 attached to the tank reinforcing member 215. The tank bracket 226 is fixed to the tank reinforcing member 215 using a tank fixing bolt 227.

  Specifically, a bolt fastening block 227a is attached to the side reinforcing plate 215A and the upper reinforcing plate 215B located on the front side by welding or the like. The bolt fastening block 227a is formed with a screw hole that engages with the tank fixing bolt 227. Further, the front end portion of the tank bracket 226 is provided with a hook-shaped portion 226d having an insertion hole (not shown in the figure) through which the tank fixing bolt 227 is inserted.

  Therefore, the tank bracket 226 is fixed to the tank reinforcing member 215 by inserting the tank fixing bolt 227 through the insertion hole formed in the bowl-shaped portion 226d and fastening it to the bolt fastening block 227a. In this way, the urea water tank 200 is stored in the tank storage container 212 with the tank bracket 226 fixed to the tank reinforcing member 215.

  The tank bracket 226 includes an upper portion 226 a extending in the horizontal direction and an inclined surface 226 b along the inclined surface 200 b of the urea water tank 200. The inclined surface 226b is held by pressing the inclined surface 200b of the urea water tank 200 from above in a state where the urea water tank 200 is stored in the tank storage container 212.

  Therefore, the urea water tank 200 is held in a state of being accommodated in the tank reinforcing member 215 by the tank bracket 226 even if it is not fixed to the tank reinforcing member 215 using bolts or the like. In this way, the urea water tank 200 is securely held and reinforced by the tank storage container 212 (tank reinforcing member 215, tank bracket 226).

  Next, the arrangement of the electric drive parts (inverter 18, step-up / down converter 100, power storage device 19) and the urea water tank 200 and the electric drive parts and the upper swing body 3 of the urea water tank 200 in the hybrid excavator according to this embodiment. A detachable structure will be described.

  8 and 9 are schematic plan views of the upper-part turning body 3 showing a first example of the arrangement of the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 according to the present embodiment. It is a figure and a right view.

  As shown in FIG. 8, a diesel engine 11 is disposed in the center of the rear part of the upper swing body 3. A speed reducer 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 12 is connected to the opposite side (right side) of the speed reducer 13 to which the diesel engine 11 is connected. Connected to allow power transmission. That is, the diesel engine 11, the speed reducer 13, and the motor generator 12 are disposed as a unit from the rear center of the upper swing body 3 to the right rear part.

  An exhaust gas processing device 150 is disposed on the motor generator 12 and the speed reducer 13. The exhaust gas processing device 150 and the diesel engine 11 (turbocharger 61) are connected by an exhaust pipe 62.

  A cooling unit 190 is disposed at the left rear portion of the upper swing body 3 (left side of the diesel engine 11). The cooling unit 190 includes a cooling unit 190B including a radiator for the diesel engine 11 and the intercooler 65, and a cooling unit 190B including the motor generator 12, the turning electric motor 21, and a radiator for electric drive parts.

  A cabin 10 is disposed on the left front portion of the upper swing body 3.

  A boom support frame 180 that supports the boom 4 is firmly attached to the front center of the upper swing body 3 (to the right of the cabin 10). The boom 4 is supported by the boom pin 4p passing through the right frame 180R, the boom 4, and the left frame 180L while being sandwiched between the right frame 180R and the left frame 180L of the boom support frame 180.

  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 (the front side 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).

  A hydraulic oil tank 170 that stores hydraulic oil used in the hydraulic drive system of the hybrid excavator is disposed at the left central portion of the upper swing body 3 (rear of the cabin 10).

  The electric drive component and the urea water tank 200 are disposed at the right front portion of the upper swing body 3 (to the right of the boom support frame 180 held in front of the fuel tank 160 disposed at the right center portion and at the front center). The

  As shown in FIG. 9, a flat mounting member 300 is fixed on the swivel frame 3a at the right front portion of the upper swing body 3 (a region in front of the fuel tank 160). Is fixed directly or indirectly to the mounting member 300.

  As shown in FIG. 9, the urea water tank 200 is disposed and fixed on the attachment member 300 adjacent to the front of the fuel tank 160.

  The power storage device 19 is disposed on the attachment member 300 adjacent to the front of the urea water tank 200. Specifically, the power storage device 19 is housed inside a housing 19a having a substantially rectangular parallelepiped outer shape, and the housing 19a has flat mounting legs 19b extending forward or backward at its four corners. However, the mounting foot 19b is fixed on the mounting member 300 via the support portion 19M.

  A protective cover 240 having an upper surface 243 fixed to the attachment member 300 and raised (separated) from the upper surface of the turning frame 3 a is provided on the power storage device 19. The inverter 18 and the buck-boost converter 100 are disposed on the power storage device 19 by being fixed to the upper surface 243 of the protective cover 240.

  On the upper surface 243 of the protective cover 240, the inverter 18 and the step-up / down converter 100 are arranged side by side (from the left to the step-up / down converter 100, the inverter 18) via the support unit 18 </ b> M and the support unit 100 </ b> M including vibration damping rubber, respectively. To the upper surface 243 of the protective cover 240. More specifically, each of the inverter 18 and the step-up / down converter 100 has a substantially rectangular parallelepiped outer shape having substantially the same physique. The inverter 18 and the step-up / down converter 100 are arranged and fixed side by side in such a manner that the longitudinal direction of the outer shape of each substantially rectangular parallelepiped is aligned with the front-rear direction.

  The inverter 18 drives the motor generator 12 and the turning electric motor 21 using electric power supplied from the power storage device 19 via 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 of the wire harnesses 31, 32 in the inverter 18 (connectors for connection to the wire harnesses 31, 32) are arranged in the longitudinal direction (hereinafter simply referred to as “longitudinal length of the inverter 18”). (Referred to as “direction”).

  In addition, the inverter 18 has the connection connector which connects the wire harness (not shown) between the buck-boost converters 100 on the side surface of the rear end of a longitudinal direction similarly to the connection connector which connects the wire harnesses 31 and 32. Further, the step-up / down converter 100 has a connecting connector for connecting such a wire harness as a rear side surface, that is, a longitudinal direction in a substantially rectangular parallelepiped outer shape of the step-up / down converter 100 (hereinafter simply referred to as “longitudinal direction of the step-up / down converter 100”). On the side of the rear end. Further, the buck-boost converter 100 has a connection connector for connecting a wire harness (not shown) between the power storage device 19 and the rear end side surface in the longitudinal direction. Moreover, the electrical storage apparatus 19 has a connection connector which connects this wire harness in a back side surface.

  As shown in FIG. 8, the wire harness 31 extending rearward from the inverter 18 is bent leftward to avoid interference with the rear urea water tank 200, and the front of the urea water tank 200 is directed from right to left. It is arranged in an extended manner. The wire harness 31 is bent backward on the left side from the left end of the urea water tank 200, and is routed in a longitudinally extending manner from the front to the rear on the left side of the urea water tank 200 and the fuel tank 160. The wire harness 31 is bent to the right side behind the rear end of the fuel tank 160 and is connected to the motor generator 12 disposed at the right rear part of the upper swing body 3.

  Further, the wire harness 32 extending rearward from the inverter 18 is bent in the left direction like the wire harness 31 and is routed in such a manner that the front of the urea water tank 200 extends from right to left. Similar to the wire harness 31, the wire harness 32 is bent backward from the left end of the urea water tank 200 and extends from the front to the rear between the urea water tank 200 and the fuel tank 160 and the right frame 180R. It is arranged in a manner to do. The wire harness 32 is bent leftward behind the rear end of the right frame 180R and is connected to the turning electric motor 21 disposed near the center of the upper turning body 3.

  Cooling water is supplied to the electric drive component from a radiator included in the cooling unit 190B. Such cooling water circulates through a water jacket provided in the inverter 18, the step-up / down converter 100, and the power storage device 19. Thereby, inverter 18, buck-boost converter 100, and power storage device 19 can be cooled. As shown in FIG. 8, a cooling water hose 191 for supplying cooling water is connected between the cooling unit 190 and an electric drive component (for example, the inverter 18).

  The inverter 18 has a connection portion with the cooling water hose 191 on the side surface at the rear end in the longitudinal direction, similarly to the connection connector with the wire harnesses 31 and 32. The cooling water hose 191 extending backward from the inverter 18 is bent leftward in order to avoid interference with the urea water tank 200, as with the wire harnesses 31 and 32, and the front of the urea water tank 200 is directed from right to left. It is arranged in an extended manner. As with the wire harnesses 31 and 32, the cooling water hose 191 is bent backward from the left end of the urea water tank 200 to the left, and vertically cuts from the front to the rear at the left of the urea water tank 200 and the fuel tank 160. Arranged in a manner. Then, the cooling water hose 191 is bent in the left direction in front of the diesel engine 11 and routed so as to cross from the right to the left, and is connected to the cooling unit 190B.

  Although omitted in FIG. 8, a cooling water hose for returning the cooling water that has cooled the electric drive parts to the cooling unit 190B is also provided. For example, when the cooling water introduced from the inverter 18 is circulated in the order of the inverter 18, the buck-boost converter 100, and the power storage device 19, the return cooling water hose is between the cooling unit 190 </ b> B and the power storage device 19. Connect.

  As shown in FIG. 8, the pipe 69 extending from the urea water tank 200 is routed in a manner that runs vertically from the front to the rear on the left side of the urea water tank 200 and the fuel tank 160, as with the wire harness 31. The exhaust gas treatment device 150 is connected to the right rear portion of the upper swing body 3.

  The wire harnesses 31 and 32 are preferably routed so as to be positioned above the pipe 69 and the cooling water hose 191 in a portion adjacent to the pipe 69 and the cooling water hose 191. Thereby, even if urea water or cooling water leaks from the pipe 69 or the cooling water hose 191, it is possible to prevent urea water or cooling water from being applied to the wire harnesses 31 and 32.

  Here, with reference to FIG. 10, FIG. 11, the attachment or detachment structure with respect to the upper revolving body 3 of the electric drive component shown in FIG. 8, FIG. 9 and the urea water tank 200 is demonstrated.

  FIG. 10 is a plan view for explaining an example of an attachment / detachment structure of the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 shown in FIGS. FIG. 11 is a side view for explaining an example of the attachment / detachment structure of the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 shown in FIGS. 8 and 9.

  In FIG. 10, the part that cannot be seen is represented by a dotted line.

  As shown in FIG. 10, the attachment member 300 has a substantially square outer shape in plan view. The attachment member 300 has four boss seats 301 at the four corners of the upper surface, and each boss seat 301 is provided with a boss 301a. As shown in FIG. 11, a thread groove is formed on the inner surface of the boss 301a, and a lifting jig T1 can be screwed.

  As shown in FIG. 10, the boss 301a (boss seat 301) is provided with electric drive parts (inverter 18, step-up / down converter 100, power storage device 19), urea water tank 200, protective cover 240, and the like in a plan view. Removed from the position. That is, the boss 301 a is not hidden by the inverter 18, the step-up / down converter 100, the power storage device 19, the urea water tank 200, the protective cover 240, and the like that are fixed directly or indirectly to the mounting member 300 in plan view. Therefore, the jig T1 can be screwed onto the boss 301a in a state where the inverter 18, the step-up / down converter 100, the power storage device 19, the urea water tank 200, the protective cover 240, and the like are fixed on the mounting member 300. Then, it is fixed to the power storage device 19 fixed on the attachment member 300, the urea water tank 200, the protective cover 240, and the upper surface 243 of the protective cover 240 by lifting the jig T <b> 1 by hanging a suspension cable or the like. The inverter 18 and the buck-boost converter 100 can be removed as a batch submodule.

  In addition, when the electric drive component and the urea water tank 200 are attached to the upper swing body 3, the work can be performed in the reverse process. That is, the electric drive parts similar to the arrangement modes shown in FIGS. 8 to 11 and the sub-module of the urea water tank 200 are configured on the attachment member 300, and then the jig T1 is screwed to the boss 301a. Then, the electric drive component and the urea water tank 200 can be mounted on the upper swing body 3 (the swing frame 3a) as a collective sub-module by hanging the suspension cable on the jig T1.

  Thus, in this example, the electric drive parts (inverter 18, buck-boost converter 100, power storage device 19) and urea water tank 200 are attachment members that are support members attached to the upper swing body 3 (the swing frame 3a). Through 300, a sub-module which can be attached and detached as a unit is configured. Therefore, the electric drive component and the urea water tank 200 can be attached or removed in a lump. That is, the electric drive component and the urea water tank 200 can be attached and detached relatively easily. Therefore, it is easy to shorten the time required for the assembly process of the right front portion of the upper swing body 3 to be within a predetermined assembly time. Further, when it is necessary to perform maintenance by removing the electric drive parts, the urea water tank 200, and the like from the upper swing body 3, the working time can be shortened.

  Subsequently, FIGS. 12 and 13 show the upper swing body 3 showing a second example of the arrangement of the electric drive parts (inverter 18, step-up / down converter 100, and power storage device 19) and the urea water tank 200 according to the present embodiment. It is a schematic plan view and a right side view.

  In the description of this example, a description of a configuration in which the same arrangement as that of the first example described above is omitted, and a description will be given focusing on portions different from the first example.

  Similar to the first example, the electric drive component and the urea water tank 200 are provided on the right front portion of the upper swing body 3 (the front side of the fuel tank 160 disposed at the right center portion and the boom support frame 180 firmly held at the front center. (Right).

  As shown in FIG. 13, the power storage device 19 is fixed on the revolving frame 3 a via a support portion 19 </ b> M including a damping rubber and the like, adjacent to the front of the fuel tank 160. Specifically, the power storage device 19 is housed inside a housing 19a having a substantially rectangular parallelepiped outer shape, and the housing 19a has flat mounting legs 19b extending forward or backward at its four corners. However, the mounting foot 19b is fixed on the turning frame 3a via the support portion 19M (see FIG. 14).

  A protective cover 240 having an upper surface 243 fixed to the revolving frame 3 a and raised (separated) from the upper surface of the revolving frame 3 a is provided on the power storage device 19. The inverter 18, the step-up / down converter 100, and the urea water tank 200 are arranged on the power storage device 19 by being fixed to the upper surface 243 of the protective cover 240 side by side.

  On the upper surface 243 of the protective cover 240, the urea water tank 200 is disposed adjacent to the front of the fuel tank 160, and the inverter 18 and the step-up / down converter 100 are disposed adjacent to the front of the urea water tank 200. In front of the urea water tank 200, the inverter 18 and the step-up / down converter 100 are arranged side by side through the support unit 18M and the support unit 100M including vibration damping rubber, respectively (from the left to the step-up / down converter 100 and the inverter 18). (In order) secured to the upper surface 243 of the protective cover 240. More specifically, each of the inverter 18 and the step-up / down converter 100 has a substantially rectangular parallelepiped outer shape having substantially the same physique. The inverter 18 and the step-up / down converter 100 are arranged and fixed side by side in such a manner that the longitudinal direction of the outer shape of each substantially rectangular parallelepiped is aligned with the front-rear direction.

  As shown in FIG. 13, the power storage device 19 is disposed at a forward position with a certain distance from the fuel tank 160. On the other hand, the urea water tank 200 disposed on the upper surface 243 of the protective cover 240 is disposed at a front position that secures a minimum distance from the fuel tank 160. Therefore, the rear end position of the power storage device 19 is near the center in the front-rear direction of the urea water tank 200 (the front-rear position where the drain plug 211 is disposed). Further, a drain hole 241 is provided at a location where the urea water tank 200 is disposed in the protective cover 240, and the drain from the back side of the protective cover 240 with the urea water tank 200 fixed to the upper surface 243 of the protective cover 240. The plug 211 is exposed. Thus, a work space 244 between the protective cover 240 and the swivel frame 3 a is provided below the urea water tank 200, and an operator accesses the drain plug 211 using the work space 244 and the drain hole 241. can do. Further, by providing the work space 244, it can be effectively used as a wiring space for a wire harness (not shown) or a cooling water hose (not shown) connected to the side surface of the rear end of the power storage device 19. That is, since the wire harness and the cooling water hose are difficult to bend, the work space 244 is provided between the power storage device 19 and the fuel tank 160, so that the wire harness and the cooling water hose can be routed relatively easily. It becomes possible.

  Moreover, as shown in FIG. 13, the urea water tank 200 is disposed so as to wrap around the front and rear positions at which the boom pins 4p are provided, but the upper end position of the urea water tank 200 is lower than the height at which the boom pins 4p are inserted. When the boom 4 is assembled at the final stage of the mass production process, the boom pin 4p can be inserted from the right side.

  The outlets for the wire harnesses 31 and 32 in the inverter 18 (connectors to the wire harnesses 31 and 32) are provided on the rear side surface, that is, the side surface at the rear end in the longitudinal direction.

  In addition, the inverter 18 has the connection connector which connects the wire harness (not shown) between the buck-boost converters 100 on the side surface of the rear end of a longitudinal direction similarly to the connection connector which connects the wire harnesses 31 and 32. Moreover, the step-up / down converter 100 has a connection connector for connecting the wire harness on the rear side surface, that is, the side surface of the rear end in the longitudinal direction. Further, the buck-boost converter 100 has a connection connector for connecting a wire harness (not shown) between the power storage device 19 and the rear end side surface in the longitudinal direction. The power storage device 19 has a connection connector for connecting the wire harness on the side surface at the rear end.

  As shown in FIG. 13, since the inverter 18 is disposed on the upper surface 243 of the protective cover 240, the wire harnesses 31 and 32 extending rearward from the inverter 18 are arranged on the left side of the urea water tank 200 from the front to the rear. It is routed in a manner that gradually lowers the height. The wire harnesses 31 and 32 are arranged and fixed on the turning frame 3a on the left side of the fuel tank 160.

  As shown in FIG. 12, the inverter 18 has a connection portion with the cooling water hose 191 on the side surface at the rear end in the longitudinal direction, similarly to the connection connector with the wire harnesses 31 and 32.

  Further, as shown in FIG. 13, since the inverter 18 is disposed on the upper surface 243 of the protective cover 240, the cooling water hose 191 extending rearward from the inverter 18 has a urea water tank as in the wire harnesses 31 and 32. On the left side of 200, it is routed in such a manner that the height gradually decreases from the front to the rear. The cooling water hose 191 is arranged and fixed on the turning frame 3 a on the left side of the fuel tank 160.

  Further, as shown in FIG. 13, on the inverter 18 and the step-up / down converter 100, for example, a storage box 250 for storing a grease pail can, an electric pump, an automatic greasing device including a grease gun, a tool, and the like is disposed. Is done.

  Further, as shown in FIG. 13, the electric drive component and the urea water tank 200 in the right front portion of the upper swing body 3 are arranged in such a manner that the height decreases toward the front, and is covered with an exterior cover 260. Thereby, when the operator who boarded the cabin 10 sees the right front, the electric drive parts and the urea water tank 200 do not block the field of view, and an appropriate visual field in the right front of the cabin 10 can be secured. .

  Here, with reference to FIGS. 14-16, the attachment or detachment structure with respect to the upper revolving body 3 of the electric drive component shown in FIG. 12, FIG. 13 and the urea water tank 200 is demonstrated.

  FIG. 14 is a plan view illustrating an example of a structure for attaching and detaching the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 shown in FIGS. 12 and 13. 15 (FIGS. 15A and 15B) illustrates an example of a structure for attaching and detaching the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 shown in FIGS. FIG. FIG. 16 is a cross-sectional view illustrating an example of the structure of the support portion 19 </ b> M of the power storage device 19.

  In FIG. 14, a portion that cannot be visually observed is represented by a dotted line.

  As shown in FIGS. 14 and 15A, the housing 19 a that houses the power storage device 19 has four bosses 19 c on the upper surface. A thread groove is formed on the inner surface of the boss 19c, and a lifting jig T2 can be screwed.

  As shown in FIG. 14, the protective cover 240 has an insertion hole 242 at substantially the same position as the boss 19 c of the housing 19 a that houses the power storage device 19 in plan view. The insertion hole 242 is removed from the position where the inverter 18, the step-up / down converter 100, the urea water tank 200, and the like are disposed on the upper surface 243 of the protective cover 240. That is, the insertion hole 242 and the boss 19c visible through the insertion hole 242 are not hidden by the inverter 18, the step-up / down converter 100, the urea water tank 200, and the like fixed to the upper surface 243 of the protective cover 240 in plan view. Therefore, as shown in FIG. 15B, the jig T2 can be screwed onto the boss 19c through the insertion hole 242 from above the protective cover 240. Then, the power storage device 19 (housing 19a) is lifted by hanging a hanging cable on the jig T2 in a state where the fixing of the power storage device 19 (housing 19a) and the protective cover 240 to the turning frame 3a is released. The inverter 18 fixed to the upper surface 243 of the protective cover 240, the step-up / down converter 100, and the urea water tank 200 can be removed as a batch submodule.

  15A and 15B, an elastic pad 19d is attached to a portion of the upper surface of the housing 19a where the boss 19c is provided, and the housing 19a for housing the power storage device 19 is provided. Consideration is made so that the back surface of the protective cover 240 does not come into direct contact.

  In addition, when the electric drive component and the urea water tank 200 are attached to the upper swing body 3, the work can be performed in the reverse process. That is, after the electric drive parts similar to the arrangement modes shown in FIGS. 12 to 14 and the sub-module of the urea water tank 200 are configured, as shown in FIG. 15B, the protective cover 240 is passed through the insertion hole 242 as shown in FIG. The jig T2 is screwed to the boss 19c. Then, the electric drive component and the urea water tank 200 can be mounted on the upper swing body 3 (the swing frame 3a) as a collective sub-module by hanging the suspension cable on the jig T2.

  As shown in FIG. 16, the support portion 19M includes vibration damping rubbers 19Ma and 19Mb, washers 19Mc and 19Md, bolts 19Me, and nuts 19Mf as an example. The laminated body in which the swivel frame 3a, 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 through holes in the vertical direction. It is fastened in the up-down direction by a bolt 19Me inserted above and a nut 19Mf fastened to the tip of the bolt 19Me. In the case of this example, by removing the nut 19Mf from the bolt 19Me, the power storage device 19 can be released from being fixed to the turning frame 3a.

  Thus, in this example, the electric drive parts (inverter 18, buck-boost converter 100, power storage device 19) and urea water tank 200 are protective covers that are support members attached to the upper swing body 3 (the swing frame 3a). Through 240, a sub-module that can be attached and detached as a unit is configured. Therefore, as in the first example, the electric drive component and the urea water tank 200 can be attached or detached in a lump. That is, the electric drive component and the urea water tank 200 can be attached and detached relatively easily. Therefore, it is easy to shorten the time required for the assembly process of the right front portion of the upper swing body 3 to be within a predetermined assembly time. Further, when it is necessary to perform maintenance by removing the electric drive parts, the urea water tank 200, and the like from the upper swing body 3, the working time can be shortened.

  Four bosses 19c are provided on the upper surface of the housing 19a that houses the power storage device 19. However, it is possible to attach the jig T2 and lift the electric drive component and the urea water tank 200 in a balanced manner. For example, the number of the bosses 19c may be three, or may be five or more. The same applies to the insertion hole 242 of the protective cover 240 through which the jig T2 is inserted when the jig T2 is attached to the boss 19c.

  Next, FIGS. 17 and 18 are views of an upper swing body 3 showing a third example of the arrangement of the electric drive parts (the inverter 18, the step-up / down converter 100, and the power storage device 19) and the urea water tank 200 according to the present embodiment. It is a schematic plan view and a right side view.

  In the description of this example, a description of a configuration in which the same arrangement as that of the first example and the second example described above is omitted, and a description will be given focusing on portions different from the first example and the second example.

  As in the first and second examples, the electric drive component and the urea water tank 200 are fixed to the front right side of the upper swing body 3 (front of the fuel tank 160 disposed at the right center and the center of the front). It is arranged on the right side of the support frame 180.

  As illustrated in FIGS. 17 and 18, the power storage device 19 and the urea water tank 200 are arranged in the same manner as in the second example. That is, the power storage device 19 is fixed to the turning frame 3a at a forward position that secures a certain distance from the fuel tank 160, and the urea water tank 200 secures a minimum distance from the fuel tank 160. It is fixed to the upper surface 243 of the protective cover 240 at the front position.

  On the other hand, the inverter 18 and the step-up / down converter 100 are arranged in a manner different from that of the second example. The inverter 18 and the step-up / down converter 100 are each arranged in a mode in which the rear end side in the longitudinal direction faces diagonally left rearward (a mode in which the front end side faces diagonally forward right) in plan view.

  The inverter 18 has a connector for connection with the wire harnesses 31 and 32 on the side surface at the rear end in the longitudinal direction, as in the second example. As in the second example, the wire harnesses 31 and 32 extending obliquely leftward and rearward from the inverter 18 are bent leftward in order to avoid interference with the fuel tank 160. However, since the wire harnesses 31 and 32 extend from the inverter 18 diagonally to the left, the bending angles of the wire harnesses 31 and 32 are smaller than in the second example. Therefore, the space in the front-rear direction necessary for changing the wiring direction of the wire harnesses 31 and 32 extending from the side surface at the rear end in the longitudinal direction of the inverter 18 can be reduced.

  Moreover, the inverter 18 has the connection part with the cooling water hose 191 in the side surface of the rear end of the longitudinal direction similarly to the 2nd example. Like the wire harnesses 31 and 32, the cooling water hose 191 extending diagonally to the left rearward from the inverter 18 is bent leftward to avoid interference with the fuel tank 160. However, since the cooling water hose 191 extends from the inverter 18 diagonally to the left, the bending angle of the cooling water hose 191 is smaller than that in the second example. Therefore, the space in the front-rear direction necessary for changing the wiring direction of the cooling water hose 191 extending from the side surface at the rear end in the longitudinal direction of the inverter 18 can be reduced.

  Thus, in this example, the space in the front-rear direction required for the wiring harnesses 31 and 32 and the cooling water hose 191 extending from the rear end in the longitudinal direction of the inverter 18 can be reduced. As shown in FIG. 18, the inverter 18 and the step-up / step-down converter 100 can be arranged further rearward. Thereby, the visual field in the right front of the cabin 10 can be ensured more appropriately.

  In particular, since the wire harnesses 31 and 32 need to supply relatively high voltage and large current power to the motor generator 12 and the turning motor 21, the wire harnesses 31 and 32 are relatively thick and difficult to bend. There is a tendency that the bendable radius R is relatively large. Also, the cooling water hose 191 is often employed which is relatively difficult to bend from the viewpoint of resistance. Therefore, the effect of improving the space efficiency in the front-rear direction by the arrangement of this example is great.

  Here, with reference to FIG. 19, the attachment / detachment structure with respect to the upper revolving body 3 of the electric drive component and urea water tank 200 shown in FIG. 17, FIG. 18 is demonstrated.

  FIG. 19 is a plan view for explaining an example of an attachment / detachment structure of the electric drive components (inverter 18, step-up / down converter 100, power storage device 19) and urea water tank 200 shown in FIGS. 17 and 18.

  Note that, in FIG. 19, a portion that cannot be seen is represented by a dotted line.

  The configurations of the electric drive component and the urea water tank 200 in this example are the same as those in the second example except that the arrangement direction (arrangement in a plan view) of the inverter 18 and the step-up / down converter 100 on the protective cover 240 is different.

  That is, the housing 19 a that houses the power storage device 19 has four bosses 19 c on the upper surface, and the four bosses 19 c are inserted through the jig T <b> 2 through the four insertion holes 242 provided in the upper surface 243 of the protective cover 240. Provided in a possible manner. The insertion hole 242 is removed from the position where the inverter 18, the step-up / down converter 100, the urea water tank 200, and the like are disposed on the upper surface 243 of the protective cover 240. That is, the insertion hole 242 and the boss 19c visible through the insertion hole 242 are not hidden by the inverter 18, the step-up / down converter 100, the urea water tank 200, and the like fixed to the upper surface 243 of the protective cover 240 in plan view. Therefore, as shown in FIG. 15B of the second example, the jig T2 can be screwed onto the boss 19c from the top of the protective cover 240 through the insertion hole 242. Then, in the state where the storage device 19 (housing 19a) and the protective cover 240 are fixed to the revolving frame 3a, the suspension is lifted by hanging a hanging cable on the jig T2, as in the case of the second example. The inverter 18 fixed to the power storage device 19 (housing 19a) and the upper surface 243 of the protective cover 240, the step-up / down converter 100, and the urea water tank 200 can be removed as a collective submodule.

  Similarly to the case of the second example, when the electric drive component and the urea water tank 200 are attached to the upper swing body 3, the work can be performed in the reverse process. That is, after configuring the electric drive parts similar to the arrangement modes shown in FIGS. 17 to 19 and the sub-module of the urea water tank 200, as shown in FIG. 15B of the second example, The jig T2 is screwed onto the boss 19c through the insertion hole 242. Then, the electric drive component and the urea water tank 200 can be mounted on the upper swing body 3 (the swing frame 3a) as a collective sub-module by hanging the suspension cable on the jig T2.

  Thus, also in this example, the electric drive parts (inverter 18, buck-boost converter 100, power storage device 19) and urea water tank 200 are protection members that are support members attached to the upper swing body 3 (the swing frame 3a). A sub-module that can be attached and detached as a unit is configured through the cover 240. Therefore, it is possible to obtain the same operation and effect as the second example described above.

  Next, FIG. 20 and FIG. 21 show the fourth example of the arrangement of the electric drive parts (the inverter 18, the step-up / down converter 100, and the power storage device 19) and the urea water tank 200 according to the present embodiment of the upper swing body 3. It is a schematic plan view and a right side view.

  In the description of this example, a description of a configuration in which the same arrangement as in the first to third examples described above is omitted, and a description will be given focusing on parts different from the first to third examples.

  As in the first to third examples, the electric drive component and the urea water tank 200 are a right front part of the upper swing body 3 (a boom which is firmly fixed to the front and front center of the fuel tank 160 disposed at the right center part). It is arranged on the right side of the support frame 180.

  As shown in FIGS. 20 and 21, in this example, the inverter 18, the step-up / down converter 100, and the power storage device 19, which are electric drive components, are substantially the same size as the case 19 a in the second and third examples. The body is housed and configured as an electric drive module 270. In the casing of the electric drive module 270, the inverter 18 is disposed at the rearmost position, the step-up / down converter 100 is disposed at the front, and the power storage device 19 is disposed at the frontmost position.

  The arrangement mode of the electric drive module 270 is the same as that of the power storage device 19 in the second example and the third example. The arrangement of the urea water tank 200 is the same as in the second example and the third example.

  That is, as shown in FIG. 21, the electric drive module 270 is fixed on the revolving frame 3 a in front of the fuel tank 160 via a support portion 270 </ b> M including a damping rubber and the like. Specifically, the electric drive module 270 having a substantially rectangular parallelepiped outer shape has flat plate-like mounting feet 270a extending forward or backward (see FIG. 22), and the mounting feet 270a are the support portions. It is fixed on the turning frame 3a via 270M. In addition, the urea water tank 200 is disposed adjacent to the front of the fuel tank 160 on the upper surface 243 of the protective cover 240.

  In addition, as shown in FIG. 21, the electric drive module 270 is disposed at a front position with a certain distance from the fuel tank 160. On the other hand, the urea water tank 200 disposed on the upper surface 243 of the protective cover 240 is disposed at a front position that secures a minimum interval with respect to the fuel tank 160, as in the second and third examples. ing. Therefore, the rear end position of the electric drive module 270 is in front of the center of the urea water tank 200 in the front-rear direction (front-rear position where the drain plug 211 is disposed). Thus, as in the second and third examples, a working space 244 between the protective cover 240 and the swivel frame 3a is provided below the urea water tank 200.

  The electric drive module 270 has a connector for connection with the wire harnesses 31 and 32 on the side surface at the rear end. The wire harnesses 31 and 32 extending rearward from the electric drive module 270 are bent leftward to avoid interference with the fuel tank 160, and are arranged in such a manner that the front of the fuel tank 160 extends from right to left. Searched for. The wire harnesses 31 and 32 are bent rearwardly to the left of the left end of the fuel tank 160.

  Moreover, the electric drive module 270 has the connection part with the cooling water hose 191 in the side surface of a rear end similarly to the connection connector of the wire harnesses 31 and 32. FIG. The cooling water hose 191 extending rearward from the electric drive module 270 is bent to the left in order to avoid interference with the fuel tank 160, like the wire harnesses 31 and 32, and the front of the fuel tank 160 is directed from right to left. It is arranged in an extended manner. Then, the cooling water hose 191 is bent rearwardly to the left of the left end of the fuel tank 160, similarly to the wire harnesses 31 and 32.

  As described above, the wire harnesses 31 and 32 and the cooling water hose 191 tend to be difficult to bend. However, in this example, since there is a work space 244 behind the electric drive module 270, the wire harnesses 31 and 32 and the cooling water hose 191 can be routed with a gentle curvature by effectively using the work space 244. Is possible.

  Further, in this example, unlike the second example and the third example, the inverter 18 and the step-up / down converter 100 are not mounted on the upper surface 243 of the protective cover 240. Therefore, as shown in FIG. The size of the storage box 250 can be increased while ensuring an appropriate field of view.

  Here, with reference to FIG. 22, the attachment / detachment structure of the electric drive component (electric drive module 270) and the urea water tank 200 shown in FIGS. 20 and 21 will be described.

  FIG. 22 is a plan view for explaining an example of a detachable structure of the electric drive component (electric drive module 270) and the urea water tank 200 shown in FIGS.

  In addition, in the figure, the part which cannot be visually observed is represented by a dotted line.

  As shown in FIG. 22, the electric drive module 270 has four bosses 270 b on the upper surface, like the housing 19 a that houses the power storage device 19 in the second and third examples, and the four bosses 270 b The jig T2 can be inserted through the four insertion holes 242 provided in the upper surface 243 of the protective cover 240. The insertion hole 242 is removed from the position where the urea water tank 200 and the like are disposed on the upper surface 243 of the protective cover 240. That is, the insertion hole 242 and the boss 270 b that can be visually recognized through the insertion hole 242 are not hidden by the urea water tank 200 or the like fixed to the upper surface 243 of the protective cover 240 in plan view. Therefore, similarly to the power storage device 19 (housing 19a) shown in FIG. 15B of the second example, the jig T2 can be screwed onto the boss 270b from the top of the protective cover 240 through the insertion hole 242. Then, in a state where the electric drive module 270 and the protective cover 240 are fixed to the revolving frame 3a, the inverter 18, the step-up / down converter 100, and the power storage device 19 are lifted by hanging a hanging cable on the jig T2 or the like. The contained electric drive module 270 and the urea water tank 200 fixed to the upper surface of the protective cover 240 can be removed as a batch submodule.

  Further, as in the case of the second example and the third example, when the electric drive component and the urea water tank 200 are attached to the upper swing body 3, the work can be performed in the reverse process. That is, after configuring the electric drive module 270 and the sub-module of the urea water tank 200 similar to the arrangement modes shown in FIGS. 20 to 22, the power storage device 19 (housing 19a shown in FIG. 15B of the second example). ), The jig T2 is screwed onto the boss 270b through the insertion hole 242 from above the protective cover 240. Then, the electric drive module 270 and the urea water tank 200 can be mounted on the upper swing body 3 (the swivel frame 3a) as a collective submodule by lifting the jig T2 by hanging a suspension cable or the like.

  Thus, also in this example, the electric drive component (electric drive module 270) and the urea water tank 200 are integrated through the protective cover 240 that is a support member attached to the upper swing body 3 (the swing frame 3a). As shown in FIG. Therefore, the same operation and effect as the second example and the third example can be obtained.

  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.

  For example, in the arrangement modes of the electric drive component and the urea water tank 200 shown in the second to fourth examples described above, the electric drive component and the urea water tank 200 are collectively arranged by adopting the mounting member 300 shown in the first example. It is good also as a structure which can be attached or detached. That is, in the second to fourth examples, the power storage device 19 or the electric drive module 270 and the protective cover 240 are fixed on the flat mounting member 300, and the mounting member 300 is fixed on the revolving frame 3a. It may be. Thereby, in a state where the fixing of the mounting member 300 and the turning frame 3a is released, the jig T1 fixed to the mounting member 300 is lifted by hanging a hanging cable or the like, whereby the electric drive component and the urea water tank 200 are collectively moved. It can be attached and detached as a submodule.

  In the above-described embodiment, the inverter 18 and the buck-boost converter 100 are arranged in such a manner that the longitudinal direction thereof is along the front-rear direction or the rear end side of the longitudinal direction is directed diagonally to the left. The embodiment is not limited. For example, the inverter 18 and the step-up / down converter 100 may be arranged such that the longitudinal direction thereof is along the left-right direction (see FIGS. 23 and 24).

  Further, in the above-described embodiment, the urea water tank 200 is disposed adjacent to the front of the fuel tank 160 (arranged at a rear position with respect to the electric drive component), but is disposed at a front position with respect to the electric drive component. May be. For example, as shown in FIGS. 23 and 24, when the inverter 18, the step-up / down converter 100, and the urea water tank 200 are arranged on the upper surface of the protective cover 240, as in the second and third examples, the inverter 18 and the step-up / down converter 100 may be disposed adjacent to the front of the fuel tank 160, and the urea water tank 200 may be disposed in front of the inverter 18 and the step-up / down converter 100. In this case, the front end of the urea water tank 200 is offset to some extent ahead of the front end of the power storage device 19, thereby providing a work space 244 for accessing the drain plug 211 in front of the power storage device 19. it can.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 1A, 1B Hydraulic motor 2 Turning mechanism 3 Upper turning body 3a Turning frame 4 Boom 4p Boom pin 5 Arm 6 Bucket 7 Boom cylinder 8 Arm cylinder 9 Bucket cylinder 10 Cabin 11 Diesel engine 12 Motor generator (motor)
13 Reducer 14 Main pump 15 Pilot pump 16 High pressure hydraulic line 17 Control valve 18, 18A, 18B Inverter (drive device)
18M Supporting part 19 Power storage device 19a Housing 19b Mounting foot 19c Boss (hanging part)
19M support portion 21 electric motor for turning 22 resolver 23 mechanical brake 24 turning speed reducer 25 pilot line 26 operation device 26A, 26B lever 26C pedal 27, 28 hydraulic line 29 pressure sensor 30 controller 31 wire harness 32 wire harness 69 urea water supply piping 100 Buck-boost converter (drive device)
100M support section 150 exhaust gas processing device 160 fuel tank 170 hydraulic oil tank 180 boom support frame 180L left frame 180R right frame 190, 190A, 190B cooling unit 191 cooling water hose 200 urea water tank (storage tank)
211 Drain plug 240 Protective cover (supporting member)
241 Drain hole 242 Insertion hole 243 Upper surface (mounting surface)
244 Working space 250 Storage box 260 Exterior cover 270 Electric drive module 300 Mounting member (supporting member)
301 Boss seat 301a Boss T1, T2 Jig (lifting jig)

Claims (6)

An upper swing body,
A cabin provided at a left front portion of the upper swing body,
A diesel engine mounted at the rear of the upper swing body,
An electric motor mounted on the rear of the upper rotating body adjacent to the diesel engine and assisting the diesel engine;
An electric drive part mounted on the right front part of the upper swing body and driving the electric motor;
An exhaust gas treatment device for treating the exhaust gas of the diesel engine using a treatment agent;
It is mounted on the right front part of the upper swing body, and has a storage tank for storing the processing agent,
The electric drive component and the storage tank constitute a sub-module that can be attached and detached as a unit through a support member attached to the frame of the upper swing body.
Excavator. The electric drive component includes a power storage device, and a drive device that drives the electric motor with electric power supplied from the power storage device,
The drive device and the storage tank are disposed on the power storage device,
The excavator according to claim 1. The support member has an upper surface spaced above the frame;
The driving device and the storage tank are attached to the upper surface of the support member,
The power storage device has three or more suspension portions to which lifting jigs are attached, and is attached to the frame below the upper surface of the support member,
The support member is disposed at substantially the same position as the suspension part in a plan view, and has three or more insertion holes through which the lifting jig can be inserted, and is formed in the drive device and the storage tank in a plan view. With a non-hidden insertion hole,
The shovel according to claim 2. The storage tank is disposed adjacent to the rear of the drive device;
The power storage device is arranged in such a manner that the rear end is ahead of the rear end of the storage tank.
The shovel according to claim 2 or 3. The storage tank has a drain plug for discharging the processing material at the lower end,
The power storage device is arranged in such a manner that the rear end is in front of the drain plug.
The excavator according to claim 4. The power storage device
Having at least one of the connection part with the wire harness and the connection part with the piping for circulating the cooling water at the rear end part,
The excavator according to claim 4 or 5.

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