CN106320420B - Hybrid excavator - Google Patents

Hybrid excavator Download PDF

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Publication number
CN106320420B
CN106320420B CN201610515497.XA CN201610515497A CN106320420B CN 106320420 B CN106320420 B CN 106320420B CN 201610515497 A CN201610515497 A CN 201610515497A CN 106320420 B CN106320420 B CN 106320420B
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CN
China
Prior art keywords
slewing body
upper slewing
storage tank
urea water
exhaust gas
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CN201610515497.XA
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Chinese (zh)
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CN106320420A (en
Inventor
曲木秀人
梅田节
山本正明
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Sumitomo SHI Construction Machinery Co Ltd
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Sumitomo SHI Construction Machinery Co Ltd
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Priority claimed from JP2016126039A external-priority patent/JP6776019B2/en
Application filed by Sumitomo SHI Construction Machinery Co Ltd filed Critical Sumitomo SHI Construction Machinery Co Ltd
Publication of CN106320420A publication Critical patent/CN106320420A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0883—Tanks, e.g. oil tank, urea tank, fuel tank
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The present invention addresses the problem of providing a hybrid shovel in which a liquid reducing agent tank that stores a treating agent supplied to an exhaust gas treatment device that treats exhaust gas from a diesel engine is efficiently disposed. The hybrid shovel of the present invention includes: an upper slewing body; a cab provided in a left front portion of the upper slewing body; a diesel engine mounted on the rear part of the upper slewing body; an electric motor mounted adjacent to the diesel engine on a rear portion of the upper slewing body and assisting the diesel engine; a power storage device mounted on a right front portion of the upper slewing body; a drive device mounted adjacent to the power storage device on a right front portion of the upper slewing body and driving the electric motor with electric power supplied from the power storage device; an exhaust gas treatment device which is mounted adjacent to the diesel engine on the rear portion of the upper slewing body and treats exhaust gas of the diesel engine with a treating agent; and a storage tank which is mounted on a right front portion of the upper revolving structure adjacent to the power storage device and the drive device and stores the treatment agent.

Description

Hybrid excavator
Technical Field
The present application claims priority based on japanese patent application No. 2015-133813, which was filed on 7/2/2015. The entire contents of this Japanese application are incorporated by reference into this specification.
The present invention relates to a hybrid shovel including an exhaust gas treatment device for treating engine exhaust gas with a treatment agent (urea aqueous solution).
Background
Conventionally, a hybrid shovel including an electric motor (assist motor) that assists an engine that is a driving force source of a hydraulic pump and an electric motor (slewing motor) that rotationally drives an upper slewing body has been known.
The hybrid shovel is configured as a shovel having only an engine as a power source, and includes, in addition to the electric motor, an electric storage device for supplying electric power to the electric motor, a drive device (for example, an inverter or a converter) for driving the electric motor with electric power supplied from the electric storage device, and the like. Here, since the hybrid shovel often adds an electric motor, an electric storage device, a drive device, and the like while following the structure of a shovel using only an engine as a power source, it is necessary to secure a position for additionally mounting an electric storage device and a drive device (hereinafter, referred to as an electric drive unit) having a relatively large volume, particularly on the upper revolving structure.
In response to this demand, for example, a device has been proposed in which an electric drive unit is additionally mounted on a right front portion of an upper revolving structure (on a side of the front portion of the upper revolving structure opposite to a cab) (see, for example, patent document 1).
In addition, a diesel engine is often mounted as a power source on the excavator. In recent years, diesel engines are required to meet high-level exhaust gas regulations, and therefore exhaust gas treatment devices that meet the high-level exhaust gas regulations are mounted.
As the exhaust gas treatment device, in many cases, NO of urea selective reduction type using an aqueous urea solution (liquid reducing agent) as a treatment agent is usedxAnd a processing device. An aqueous urea solution (hereinafter, simply referred to as "aqueous urea") is stored in a liquid reducing agent tank, and the liquid reducing agent tank is connected to an exhaust pipe via a liquid reducing agent supply pipe. The urea water in the liquid reducing agent tank is supplied to an exhaust pipe of the diesel engine by a liquid reducing agent supply pump (for example, refer to patent document 2).
Patent document 1: japanese patent laid-open publication No. 2014-84643
Patent document 2: japanese patent laid-open publication No. 2013-160005
However, when the exhaust gas treatment device is mounted on the hybrid shovel, it is necessary to secure a position for additionally mounting the exhaust gas treatment device, particularly a relatively large-volume liquid reducing agent tank attached thereto, in addition to a position for mounting the electric drive unit necessary for mixing, while following the configuration of the shovel using only the engine as a power source.
Disclosure of Invention
In view of the above-described problems, an object of the present invention is to provide a hybrid shovel in which a liquid reducing agent tank for storing a treating agent to be supplied to an exhaust gas treatment device for treating exhaust gas from a diesel engine is efficiently disposed.
In order to achieve the above object, in one embodiment, a hybrid shovel includes:
an upper slewing body;
a cab provided in a left front portion of the upper slewing body;
a diesel engine mounted on a rear portion of the upper slewing body;
an electric motor mounted adjacent to the diesel engine on a rear portion of the upper slewing body and assisting the diesel engine;
a power storage device mounted on a right front portion of the upper slewing body;
a drive device mounted adjacent to the power storage device on a right front portion of the upper slewing body and configured to drive the electric motor by electric power supplied from the power storage device;
an exhaust gas treatment device mounted adjacent to the diesel engine on a rear portion of the upper slewing body, the exhaust gas treatment device treating an exhaust gas of the diesel engine with a treatment agent; and
and a storage tank mounted on a right front portion of the upper slewing body adjacent to the power storage device and the drive device, and storing the treatment agent.
Effects of the invention
According to the above-described embodiment, it is possible to provide a hybrid shovel in which a liquid reducing agent tank for storing a treating agent to be supplied to an exhaust gas treatment device for treating exhaust gas of a diesel engine is efficiently disposed.
Drawings
FIG. 1 is a side view of a hybrid shovel.
Fig. 2 is a diagram showing an example of a configuration of a drive system of the hybrid shovel.
Fig. 3 is a diagram showing an example of the configuration of the power storage system of the hybrid shovel.
Fig. 4 is a diagram showing the structure of the exhaust gas treatment device.
Fig. 5 is a perspective view of the urea water tank as viewed from the upper right front.
Fig. 6 is an exploded perspective view of the urea water tank as viewed from the upper left to the front.
Fig. 7 is a perspective view of the urea water tank as viewed from the left obliquely downward front.
Fig. 8 is a plan view of an upper slewing body showing the arrangement of an electric drive unit and a urea water tank according to a comparative example.
Fig. 9 is a plan view of the upper slewing body of example 1 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 10 is a right side view of the upper slewing body of example 1 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 11 is a plan view of an upper slewing body according to example 2 showing the arrangement of an electric drive unit and a urea water tank according to the present embodiment.
Fig. 12 is a right side view of the upper slewing body according to example 2 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 13 is a plan view of the upper slewing body according to example 3 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 14 is a right side view of the upper slewing body according to example 3 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 15 is a plan view of the upper slewing body according to example 4 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 16 is a right side view of the upper slewing body according to example 4 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 17 is a plan view of the upper slewing body according to example 5 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 18 is a right side view of the upper slewing body according to example 5 showing the arrangement of the electric drive unit and the urea water tank according to the present embodiment.
Fig. 19 is a diagram showing an example of the configuration of the cooling system.
Fig. 20 is a bottom view of a portion of the upper slewing body on which the urea water tank is mounted.
In the figure: 1-lower traveling body, 1A, 1B-hydraulic motor, 2-slewing mechanism, 3-upper slewing body, 3 a-frame (slewing frame), 4-boom, 4 p-boom pin, 5-arm, 6-bucket, 7-boom cylinder, 8-arm cylinder, 9-bucket cylinder, 10-cab, 11-diesel engine, 12-motor generator (motor), 13-reducer, 14-main pump, 15-pilot pump, 16-high-pressure hydraulic line, 17-control valve, 18A, 18B-inverter (drive device), 18M-bearing member, 19-capacitor (electric storage device), 19M-bearing member, 21-electric motor for slewing, 22-resolver, 23-mechanical brake, 24-slewing gear, 25-pilot line, 26-operating device, 26A, 26B-joystick, 26C-pedal, 27, 28-hydraulic line, 29-pressure sensor, 30-controller, 31-harness, 31G-guide member, 32-harness, 33-cooling pipe, 33D-drain plug, 69-urea water supply pipe, 100-step-up/step-down converter (drive device), 100M-support member, 150-exhaust gas treatment device, 160-fuel tank, 170-working oil tank, 180-boom support frame, 181-outer frame, 182, 183-frame, 190A, 190B-cooling unit, 191B-radiator, 192B-water pump, 200-urea water tank (storage tank), 211-drain plug, 202-cover, 203-cover, 204-table, 205-storage box.
Detailed Description
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
First, a basic structure of the hybrid shovel according to the present embodiment will be described with reference to fig. 1 to 3.
Fig. 1 is a side view showing a hybrid shovel according to the present embodiment.
As shown in fig. 1, an upper turning body 3 is mounted on a lower traveling body 1 of the hybrid shovel via a turning mechanism 2. A boom 4 is attached to the upper slewing body 3. An arm 5 is attached to a tip of the boom 4, and a bucket 6 is attached to a tip of the arm 5. The boom 4, the arm 5, and the bucket 6 as the accessories are hydraulically driven by a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9 as hydraulic actuators, respectively. Further, an operator cab 10 on which an operator rides is provided in the upper revolving structure 3, and a diesel engine 11 (see fig. 9 and the like) and the like described later are mounted.
In the present description, the "front portion" of the upper revolving structure 3 indicates a portion on the side where the boom 4 is attached when viewed from the center of the upper revolving structure 3. Further, "front" indicates a direction in which the boom 4 extends when viewed from the center of the upper revolving unit 3. The "left side" indicates a portion that becomes left when the upper revolving structure 3 faces forward (a direction in which the boom 4 extends). The "right side" indicates a portion that is on the right when the upper revolving structure 3 faces forward (in the direction in which the boom 4 extends).
Fig. 2 is a block diagram showing a configuration of a drive system of the hybrid shovel. In the figure, the mechanical power system is indicated by a double line, the high-pressure hydraulic line is indicated by a thick line, the pilot line is indicated by a broken line, and the electric drive/control system is indicated by a thin line.
A diesel engine 11 as a main drive unit and a motor generator 12 as an auxiliary drive unit in the hybrid shovel according to the present embodiment are connected to 2 input shafts of a speed reducer 13, respectively. A main pump 14 and a pilot pump 15 are connected to an output shaft of the reduction gear 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 is capable of adjusting the stroke length of a piston by controlling the angle (tilt angle) of a swash plate, and controlling the discharge flow rate. 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 in the operation device 26. Hydraulic motors 1A (right-hand) and 1B (left-hand) for the lower traveling body 1, a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9 are connected to a control valve 17 via high-pressure hydraulic lines.
A power storage system 120 including a capacitor 19 (see fig. 3) as a power storage device is connected to the motor generator 12 via an inverter 18A. An operation device 26 is connected to the pilot pump 15 via a pilot line 25. The operation device 26 includes joysticks 26A, 26B and a pedal 26C. The levers 26A, 26B and the pedal 26C are connected to the control valve 17 and the pressure sensor 29 via a hydraulic line 27 and a hydraulic line 28, respectively. The pressure sensor 29 is connected to a controller 30.
In the hybrid shovel according to the present embodiment, the turning mechanism 2 is motorized, and a turning motor 21 for driving the turning mechanism 2 is provided. The turning motor 21 is connected to the power storage system 120 via an inverter 18B. A resolver 22, a mechanical brake 23, and a rotation reducer 24 are connected to a rotation shaft 21A of the rotation motor 21.
In the present embodiment, the inverters 18A and 18B are housed in the same housing. Hereinafter, the inverter 18 is a unit in which the inverters 18A and 18B are integrated.
The controller 30 is a main control device for performing drive control in the hybrid shovel. The controller 30 is configured by an arithmetic processing device including a CPU and a ROM, and various drive controls can be realized by executing a drive control program stored in the ROM in the CPU.
The controller 30 converts the signal supplied from the pressure sensor 29 into a speed command, and controls the driving of the turning motor 21. The signal supplied from the pressure sensor 29 is a signal indicating an operation amount in the operation device 26 for rotating the rotation mechanism 2.
The controller 30 controls the operation of the motor generator 12 (switching between the motor (assist) operation and the power generation operation), and controls the charging and discharging of the capacitor 19 (see fig. 3) based on the driving control of the step-up/step-down converter 100 (see fig. 3). The controller 30 controls the charging and discharging of the capacitor 19 by switching between the step-up operation and the step-down operation of the step-up/down converter 100 based on the state of charge of the capacitor 19, the operating state (the motoring (assist) operation or the generating operation) of the motor generator 12, and the operating state (the power operation or the regenerative operation) of the turning motor 21.
Fig. 3 is a circuit diagram of the power storage system 120. The power storage system 120 includes a capacitor 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 capacitor 19, the motor generator 12, and the turning motor 21. The capacitor 19 is provided with a capacitor voltage detection unit 112 and a capacitor current detection unit 113 that detect the voltage value and the current value of the capacitor 19. 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 the step-up operation and the step-down operation so as to limit the DC bus voltage value within a constant range according to the operating states of the motor generator 12 and the turning motor 21. The DC bus 110 is disposed between the inverters 18A and 18B and the step-up/step-down converter 100, and the capacitor 19, the motor generator 12, and the turning motor 21 receive and transmit electric power via the DC bus 110.
The switching control of the step-up operation and the step-down operation of the step-up/down converter 100 is performed based on 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 value detected by the capacitor current detection unit 113.
Hereinafter, the inverter 18 ( inverters 18A and 18B), the step-up/step-down converter 100, and the capacitor 19 may be collectively referred to as "power drive unit".
Next, referring to fig. 4, the structure of an exhaust gas treatment device 150 for treating exhaust gas discharged from the diesel engine 11 will be described.
Fig. 4 is a diagram showing a configuration example of the exhaust gas treatment device 150. In the present embodiment, the exhaust gas treatment device 150 purifies exhaust gas discharged from the diesel engine 11. The diesel engine 11 is controlled by an engine control module (hereinafter, referred to as "ECM") 60.
Exhaust gas discharged from the diesel engine 11 flows into the exhaust pipe 62 through the turbocharger 61. The exhaust gas flows from the exhaust pipe 62 into the exhaust gas treatment device 150, is purified by the exhaust gas treatment device 150, and is discharged into the atmosphere.
On the other hand, the intake air introduced into the intake pipe 64 by the air cleaner 63 is supplied to the diesel engine 11 through an intercooler 65 included in the turbocharger 61 and a cooling unit 190 (see fig. 9 and the like).
The exhaust pipe 62 is provided with a 1 st exhaust gas treatment unit and a 2 nd exhaust gas treatment unit in series. The 1 st exhaust gas treatment unit in the present embodiment is a Diesel Particulate Filter (DPF) 66 that traps Particulate matter in the exhaust gas. And the 2 nd exhaust gas treatment part is used for treating NO in the exhaust gasxThe removed selective reduction catalyst 67 is reduced. The 1 st exhaust gas treatment unit may be a Diesel Oxidation Catalyst (DOC).
The selective reduction catalyst 67 continuously reduces NO in the exhaust gas by receiving the supply of the liquid reducing agentxRemoval of NOx. In the present embodiment, urea water is used as the liquid reducing agent from the viewpoint of operability.
In addition, it is needless to say that NO can be continuously addedxFor the treatment agent for reduction, a treatment agent other than the urea aqueous solution may be used.
A urea solution injection valve 68 for supplying urea solution to the selective reduction catalyst 67 is provided in the exhaust pipe 62 on the upstream side of the selective reduction catalyst 67. The urea solution injection valve 68 is connected to the urea solution tank 200 via a urea solution supply pipe 69 (hereinafter simply referred to as "pipe 69").
The urea solution supply pipe 69 is provided with a urea solution supply pump 70. A filter 71 is provided between the urea water tank 200 and the urea water supply pump 70. The urea solution accumulated in the urea solution tank 200 is supplied to the urea solution injection valve 68 by the urea solution supply pump 70. The urea water is injected from the urea water injection valve 68 into the exhaust pipe 62 at a position upstream of the selective reduction catalyst 67 in the exhaust pipe 62.
The urea water injected from the urea water injection valve 68 is supplied to the selective reduction catalyst 67. The supplied urea water is hydrolyzed in the selective reduction catalyst 67 to generate ammonia. The ammonia thus produced reduces NO contained in the exhaust gas in the selective reduction catalyst 67x. Thereby, the exhaust gas discharged from the diesel engine 11 is purified.
No. 1NOxThe sensor 72 is disposed on the upstream side of the urea aqueous injection valve 68. No. 2NOxThe sensor 73 is disposed downstream of the selective reduction catalyst 67. No. 1NOxSensor 72 and 2 nd NOxThe sensors 73 detect NO contained in the exhaust gas at the respective arrangement positionsxThe concentration of (c).
The urea water tank 200 is provided with a remaining amount of urea water sensor 74. The remaining amount of urea water sensor 74 detects the remaining amount of urea water in the urea water tank 200.
No. 1NOxSensor 72, No. 2xThe sensor 73, the remaining amount of urea solution sensor 74, the urea solution injection valve 68, and the urea solution supply pump 70 are connected to an exhaust gas controller 75. Exhaust gas controller 75 according to No. 1x Sensor 72 and 2 nd NOxNO detected by each sensor 73xThe concentration is controlled by the injection amount by the urea solution injection valve 68 and the urea solution supply pump 70 so that an appropriate amount of urea solution is injected.
The exhaust gas controller 75 calculates a ratio of the remaining amount of the urea aqueous solution to the total volume of the urea aqueous solution tank 200 from the remaining amount of the urea aqueous solution output from the remaining amount of the urea aqueous solution sensor 74. In the present embodiment, the ratio of the remaining amount of urea solution to the total volume of the urea solution tank 200 is defined as a remaining amount ratio of urea solution. For example, the remaining urea solution ratio of 50% indicates that the urea solution of half the capacity of the urea solution tank 200 remains in the urea solution tank 200.
The exhaust gas controller 75 is communicably connected to the ECM60 that controls the diesel engine 11 via a communication means (for example, a LAN based on the CAN protocol). The ECM60 is connected to the shovel controller 76 via a communication mechanism (e.g., a LAN based on the CAN protocol, etc.).
The shovel controller 76 may share various information of the exhaust gas treatment device 150 included in the exhaust gas controller 75. The ECM60, the exhaust gas controller 75, and the shovel controller 76 each include a CPU, RAM, ROM, input/output ports, and a storage device.
A monitor 77 (display device) is connected to the shovel controller 76. Information or data such as warnings and operating conditions are displayed on the monitor 77.
Additionally, the shovel controller 76 may be the same device as the controller 30.
The exhaust gas treatment device 150 includes a freezing prevention mechanism for preventing freezing of the urea water tank 200 and the urea water supply pipe 69. In the present embodiment, the freeze prevention means uses the engine cooling water of the diesel engine 11 passing through the pipe 80. Specifically, the engine cooling water immediately after the diesel engine 11 is cooled passes through the 1 st section 80a of the pipe 80 and reaches the 2 nd section 80b while maintaining a relatively high temperature. The 2 nd section 80b 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 therein when flowing through the 2 nd section 80 b. Thereafter, when the engine cooling water flows through the 3 rd portion 80c of the pipe 80 provided adjacent to the urea water supply pipe 69, heat is supplied to the urea water supply pipe 69 and the urea water inside the pipe. After that, the engine cooling water that has released heat and has a relatively low temperature passes through the 4 th portion 80d of the pipe 80 and reaches the cooling unit 190A (radiator, etc.). In this way, the freeze prevention mechanism prevents freezing of urea water tank 200 and urea water supply pipe 69 by supplying heat to urea water tank 200 and urea water supply pipe 69 with the engine cooling water.
Next, details of the urea water tank 200 will be described with reference to fig. 5 to 7. Fig. 5 to 7 show an example of a specific configuration of the urea water tank 200. Fig. 5 is a perspective view of urea water tank 200 as viewed from the upper right front side, fig. 6 is an exploded perspective view of urea water tank 200 with filler 230 removed as viewed from the upper left front side, and fig. 7 is a perspective view of 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 drawing) on the side close to the operator during the urea water replenishment operation of the urea water tank 200 is referred to as the front side, and the inner side (the arrow X1 direction side in the drawing) is referred to as the rear side. The direction indicated by the arrow Y1 in the figure perpendicular to the front-rear direction is set to the left, and the direction indicated by the arrow Y2 in the figure is set to the right.
The urea water tank 200 is made of resin, and has a tank main body 200a having a substantially rectangular cross section and a substantially box shape as a whole. An inclined surface 200b is formed at the front upper portion of the tank main body 200 a. The inclined surface 200b is inclined so as to approach the rear side as it goes upward.
Further, a liquid feed port 200d (see fig. 6) is provided in the inclined surface 200 b. A filler 230 is detachably attached to the liquid feed port 200 d. The urea water is supplied from the liquid supply port 200d into the tank main body 200a via the filler 230 at the time of supply.
A liquid level gauge 228 is provided on the inclined surface 200 b. The liquid level meter 228 indicates the liquid level (liquid level height) of the urea water in the tank main body 200 a. The operator can prevent the urea solution from overflowing by supplying the urea solution while observing the level gauge 228 during the urea solution supplying process.
A recess 200c is formed in the right side of the inclined surface 200 b. The concave portion 200c functions as a grip (handle) when attaching and detaching the urea water tank 200 to and 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 discharged.
A filler 230 is attached to the urea water tank 200. The filler 230 guides the urea water to the feed port 200d of the urea water tank 200 at the time of replenishment. The packer 230 has a packer body 230a, a packer tube 233, and a packer cover 235.
The filler main body 230a is a cylindrical member and is formed of metal or another material (e.g., resin). The filler main body 230a is attached to the filler bracket 231 by welding, bonding, or the like. Specifically, the substantially central position of the cylindrical filler main body 230a is fixed to the filler holder 231. Therefore, in the fixed state, one end of the filler body 230a protrudes from the outside of the filler bracket 231 to form an outside protruding portion, and the other end protrudes inward to form an inside protruding portion.
The outer protrusion of the packer body 230a is threaded at the outer periphery. The packing cover 235 is detachably attached to an outer protruding portion of the packing main body 230 a.
One end of a filler tube 233 is attached to an inner protruding portion of the filler main body 230 a. The other end of filler pipe 233 is attached to liquid feed port 200d of urea water tank 200.
In this way, the filler 230 is attached to the urea water tank 200 by the filler bracket 231. The filler holder 231 is a plate-like member, and is formed of metal or other material (e.g., resin or the like).
Further, an upper attachment portion 200e and a lower attachment portion 200f are formed in the urea water tank 200. The upper attachment portion 200e is formed on the upper surface portion of the tank main body 200 a. The lower attachment portion 200f is formed below the liquid supply port 200d at the inclined surface 200 b.
Screw holes 200h are formed in the upper attachment portion 200e and the lower attachment portion 200 f. The positions of the screw holes 200h correspond to the positions of the filler attachment bolts 232 when the filler holder 231 is attached to the urea water tank 200.
Filler mounting bolts 232 are screwed into screw holes 200h of mounting portions 200e and 200f, whereby filler bracket 231 is fixed to urea water tank 200, and filler 230 is also mounted to urea water tank 200.
The urea solution is replenished in a state where the filler 230 is attached to the urea solution tank 200. When replenishing the urea water, the filler cap 235 is detached from the filler main body 230a, and the urea water is injected from the outer end of the filler main body 230 a. Thereby, the urea water is replenished to the urea water tank 200 via the filler pipe 233.
The urea water tank 200 made of resin configured as described above is stored in the tank storage container 212. The tank container 212 includes a tank reinforcing member 215 and a tank bracket 226.
As shown in fig. 5 to 7, the tank reinforcing member 215 includes a side reinforcing plate 215A, an upper reinforcing plate 215B, a tank mounting plate 215C, 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 a higher strength than the material of the urea water tank 200).
The side reinforcing plate 215A extends in the vertical direction (the Z1 and Z2 directions in the drawing) and has an L-shape in plan view. The side reinforcing plates 215A are disposed at positions facing the four corners of the urea water tank 200, and hold the four corners of the urea water tank 200.
The upper reinforcing plate 215B joins upper portions of the adjacent side reinforcing plates 215A. Thereby, the upper portion 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. The lower end of the side reinforcing plate 215A is fixed to the tank mounting plate 215C.
The can mounting plate 215C is formed with a plug opening 215E. 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 to extend in the longitudinal direction of the can mounting plate 215C (the direction of arrows Y1, Y2 in fig. 5). The lower reinforcing plate 215D is fixed to the revolving frame 2a by the fixing bolt 215Db, whereby the tank reinforcing member 215 is fixed to the revolving frame 2 a.
The plates 215A to 215D constituting the tank reinforcing member 215 can be joined by, for example, welding.
The tank bracket 226 is attached to the upper portion 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 by a tank fixing bolt 227.
Specifically, the bolt fastening block 227a is attached to the side reinforcing plate 215A and the upper reinforcing plate 215B located forward by welding or the like. A screw hole for screwing the tank fixing bolt 227 is formed in the bolt fastening block 227 a. A flange portion 226d is provided at a front end portion of the tank bracket 226, and an insertion hole (not shown) through which the tank fixing bolt 227 is inserted is formed in the flange portion 226 d.
Therefore, the tank fixing bolt 227 is inserted through the insertion hole formed in the flange portion 226d and fastened to the bolt fastening block 227a, whereby the tank bracket 226 is fixed to the tank reinforcing member 215. In this way, the urea water tank 200 is stored in the tank storage container 212 in a state where the tank bracket 226 is fixed to the tank reinforcing member 215.
The tank holder 226 includes an upper portion 226a extending in the horizontal direction and an inclined surface 226b extending along the inclined surface 200b of the urea water tank 200. In a state where the urea water tank 200 is stored in the tank storage container 212, the inclined surface 226b is held by pressing the inclined surface 200b of the urea water tank 200 from above.
Therefore, the urea water tank 200 can be held in a state of being housed in the tank reinforcing member 215 by the tank bracket 226, without being particularly fixed to the tank reinforcing member 215 by a bolt or the like. In this way, the urea water tank 200 is reliably held and reinforced by the tank storage container 212 (the tank reinforcing member 215, the tank bracket 226).
Next, the arrangement of the electric drive components (the inverter 18, the step-up/step-down converter 100, the capacitor 19) and the urea water tank 200 in the hybrid shovel according to the present embodiment will be described.
First, the arrangement of the electric drive unit and the urea water tank in the hybrid shovel according to the comparative example will be described with reference to fig. 8.
Fig. 8 is a schematic plan view of upper revolving unit 3C showing the arrangement of electric drive components (inverter 18C, step-up/step-down converter 100C, capacitor 19C) and urea water tank 200C in the hybrid shovel according to the comparative example.
Since the constituent elements other than the electric power drive unit (inverter 18C, step-up/step-down converter 100C, capacitor 19C), urea water tank 200C, harnesses 31C, 32C connected to these components, and pipe 69C are the same as those in the present embodiment, the same reference numerals are given to the components as in the present embodiment.
As shown in fig. 8, a diesel engine 11 is disposed at the rear center of the upper revolving structure 3C. The diesel engine 11 is connected to a reduction gear 13 on the right side thereof so as to be capable of transmitting power, and the motor generator 12 is connected to the reduction gear 13 so as to be capable of transmitting power on the side (right side) opposite to the side to which the diesel engine 11 is connected. That is, the diesel engine 11, the reduction gear 13, and the motor generator 12 are disposed across the right rear portion from the rear center of the upper revolving structure 3C as a whole.
An exhaust gas treatment device 150 is disposed on the motor generator 12 and the reduction gear 13. The exhaust gas treatment device 150 and the diesel engine 11 (turbocharger 61) are connected by an exhaust pipe 62.
Cooling unit 190 is disposed on the left rear portion (left side of diesel engine 11) of upper revolving unit 3C. The cooling unit 190 includes: a cooling unit 190A including a radiator for the diesel engine 11 and an intercooler 65; and a cooling unit 190B including the motor generator 12, the turning motor 21, a radiator 191B for an electric drive unit, and a water pump 192B (see fig. 19).
A cab 10 is disposed in a left front portion of the upper revolving structure 3C.
A boom support frame 180 for supporting the boom 4 is disposed at the front center of the upper revolving structure 3C (right side of the cab 10). The boom 4 is supported by the boom pin 4p penetrating the right side frame 180R, the boom 4, and the left side frame 180L in a state of being sandwiched between the right side frame 180R and the left side frame 180L of the boom support frame 180.
A turning motor 21 is disposed near the center of the upper turning body 3C, that is, near the turning center of the upper turning body 3C.
A fuel tank 160 is provided in a right central portion of the upper slewing body 3C (front side of the reduction gear 13, the motor generator 12, and the exhaust gas treatment device 150). The fuel (light oil) of the diesel engine 11 stored in the fuel tank 160 is supplied to the diesel engine 11 through a fuel pipe (not shown).
A hydraulic oil tank 170 is disposed in a left central portion (rear side of the cab 10) of the upper slewing body 3C, and the hydraulic oil tank 170 stores hydraulic oil used in a hydraulic drive system of the hybrid shovel.
The components mounted on the upper slewing body 3C described above with reference to fig. 8 are also arranged in the same manner in the hybrid shovel according to the present embodiment described below with reference to fig. 9 to 16, and therefore, the description of the hybrid shovel according to the present embodiment will be omitted.
The electric drive components (the inverter 18C, the step-up/step-down converter 100C, and the capacitor 19C) are arranged in a double-layer overlapping manner in the front of the fuel tank 160, that is, in the right front portion of the upper revolving structure 3C (the right side of the boom support frame 180). Specifically, the capacitor 19C having a large volume is disposed and fixed on the frame of the upper slewing body 3C, and the inverter 18C and the step-up/step-down converter 100C are disposed on the capacitor 19C in a left-right arrangement.
Further, inverter 18C and step-up/down converter 100C are disposed and fixed on a mounting table raised from the upper surface of the frame of upper revolving unit 3C, for example.
The inverter 18C drives the motor generator 12 and the turning motor 21 by the electric power supplied from the capacitor 19C via the step-up/step-down converter 100C. Therefore, the inverter 18C is connected to the motor generator 12 and the turning motor 21 via the harness 31C and the harness 32C, respectively. The extraction ports of the harnesses 31C, 32C in the inverter 18C, that is, the connectors to the harnesses 31C, 32C are provided on the rear side surface.
The wire harness 31C extending rearward from the inverter 18C is bent leftward and then is routed in a front-to-rear slit manner on the left side of the fuel tank 160 in order to avoid interference with the rearward fuel tank 160. The wire harness 31C is bent to the right side at a position rearward of the fuel tank 160, and then wired to be connected to the motor generator 12 disposed at the right rear portion of the upper slewing body 3C.
Similarly to the harness 31C, the harness 32C extending rearward from the inverter 18C is bent leftward and then routed between the fuel tank 160 and the right side frame 180R so as to extend forward and rearward. Further, the wiring is routed so as to be connected to the turning motor 21 disposed near the center of the upper turning body 3C after being bent leftward at a position further rearward than the rear end of the right side frame 180R.
In the figure, illustration of a wire harness connecting the capacitor 19C and the step-up/step-down converter 100C and a wire harness connecting the step-up/step-down converter 100C and the inverter 18C is omitted.
Urea water tank 200C is provided in the left central portion of upper revolving unit 3C. Specifically, the cooling unit is disposed between the hydraulic oil tank 170 and the cooling unit 190 (behind the hydraulic oil tank 170 and in front of the cooling unit 190). The urea water tank 200C and the exhaust gas treatment device 150 are connected by a pipe 69C, and urea water is supplied from the urea water tank 200C to the exhaust gas treatment device 150 through the pipe 69C.
The pipe 69C extending from the urea water tank 200C is routed in a left-to-right longitudinal direction in front of the diesel engine 11, and is connected to the exhaust gas treatment device 150 disposed on the right rear portion of the upper revolving structure 3C.
In this way, the electric drive unit (inverter 18C) and the urea water tank 200C need to be connected to the motor generator 12 and the exhaust gas treatment device 150 arranged adjacent to the rear portion (right rear portion) of the upper slewing body 3C by the harness 31C and the pipe 69C, respectively. Therefore, if the electric drive unit and the urea water tank 200 are separately disposed as in the present comparative example, the harness 31C and the pipe 69C are wired from different portions on the upper revolving structure 3C toward the rear (right rear). That is, the wire harness 31C and the pipe 69C are routed at completely different portions in the upper revolving structure 3C. In this way, it is necessary to dispose other components while avoiding both the harness 31C and the pipe 69C in a plan view, and there is a possibility that the harness 31C or the pipe 69C cannot be wired due to the disposition of the other components, and the layout efficiency is low.
In the present embodiment, the urea water tank 200 is disposed adjacent to the electric drive components (the inverter 18, the step-up/step-down converter 100, and the capacitor 19) at the right front portion of the upper slewing body 3. This allows the wiring harness 31 (see fig. 9 and the like) and the pipe 69 to be routed close to each other, thereby improving the layout efficiency. That is, efficient arrangement of the urea water tank 200 can be achieved. The following specifically describes the arrangement of the electric drive unit and the urea water tank 200 in the hybrid shovel according to the present embodiment, with reference to fig. 9 to 18.
In fig. 9 to 18, illustration of a wire harness connecting the capacitor 19 and the step-up/step-down converter 100, a wire harness connecting the step-up/step-down converter 100 and the inverter 18, the urea water supply pump 70, the filter 71, and the like is omitted.
First, fig. 9 and 10 are a plan view and a right side view of upper revolving unit 3 according to example 1 showing the arrangement of electric power drive components (inverter 18, step-up/step-down converter 100, and capacitor 19) and urea water tank 200 according to the present embodiment.
As shown in fig. 9 and 10, the electric drive unit and the urea water tank 200 are disposed in the right front portion of the upper revolving structure 3 (in front of the fuel tank 160 disposed in the right center portion). Specifically, the urea water tank 200 is disposed on the frame 3a adjacent to the front of the fuel tank 160, and the electric drive unit is disposed adjacent to the front of the urea water tank 200.
Further, the urea water tank 200 is disposed so as to include the front and rear positions at which the boom pin 4p is installed, but as shown in fig. 10, the height is lower than the height at which the boom pin 4p is inserted, and therefore, 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 electric drive components are configured in a double-layer overlapping manner. Specifically, as shown in fig. 10, the capacitor 19 having a relatively large volume is fixed to the frame 3a of the upper revolving structure 3 via a support member 19M including a vibration damping rubber. The capacitor 19 is provided with a mounting table 204 fixed to the frame 3a and elevated from the upper surface of the frame 3 a. The inverter 18 and the step-up/step-down converter 100 are fixed to the upper surface of the mounting table 204 in a left-right arrangement via a support member 18M and a support member 100M, respectively, each of which includes a damping rubber.
The inverter 18 drives the motor generator 12 and the turning motor 21 by the electric power supplied from the capacitor 19 via the step-up/step-down converter 100. Therefore, the inverter 18, the motor generator 12, and the turning motor 21 are connected by a harness 31 and a harness 32, respectively. The extraction ports of the harnesses 31, 32 in the inverter 18, that is, the connectors to the harnesses 31, 32, are provided on the rear side surface.
Connectors corresponding to other harnesses (a harness connecting the inverter 18 and the step-up/step-down converter 100, and a harness connecting the step-up/step-down converter 100 and the capacitor 19) not shown among the inverter 18, the step-up/step-down converter 100, and the capacitor 19 are also provided on the rear side surfaces thereof.
As shown in fig. 9, the harness 31 extending rearward from the inverter 18 is a urea water tank 200 that is rearward so as not to interfere with it, and is bent leftward, and then is routed so as to be cut longitudinally from front to rear on the left of the urea water tank 200 and the fuel tank 160. The wire harness 31 is bent to the right at a position rearward of the fuel tank 160, and then wired to be connected to the motor generator 12 disposed at the right rear portion of the upper revolving structure 3.
The harness 32 extending rearward from the inverter 18 is bent leftward similarly to the harness 31, and then routed so as to extend forward and rearward between the urea water tank 200, the fuel tank 160, and the right side frame 180R. Further, the wiring is bent leftward at a position rearward of the rear end of the right side frame 180R, and then connected to the turning motor 21 disposed near the center of the upper turning body 3.
As shown in fig. 9, the pipe 69 extending from the urea water tank 200 is wired to be longitudinally cut from front to rear on the left of the urea water tank 200 and the fuel tank 160, and connected to the exhaust gas treatment device 150 disposed on the right rear portion of the upper revolving structure 3, similarly to the harness 31. The wire harness 31 and the pipe 69 are wired so as to overlap in a plan view at a portion of the upper revolving structure 3 that is longitudinally cut from front to back. This can reduce the area occupied by the harness 31 and the pipe 69 in plan view, and thus can efficiently arrange the components mounted on the upper revolving structure 3. That is, efficient placement of the urea water tank 200 can be achieved.
The harness 31 and the pipe 69 may be integrally bound by being housed in the same bellows, for example, in a portion of the harness 31 and the pipe 69 that are wired so as to overlap each other in a plan view. This enables the pipe 69 to efficiently receive heat generated by the current passing through the wire harness 31. That is, the urea water can be made less likely to freeze.
The harnesses 31 and 32 are routed so as to be positioned above the pipe 69 at portions (including the portions integrally bound as described above) routed adjacent to the pipe 69. This prevents the urea water from being leaked from the pipe 69 to the harnesses 31, 32.
As shown in fig. 10, the electric drive unit and the urea water tank 200 are covered with a cover 202 so as to be accommodated in the same space. Thus, the urea water in the urea water tank 200 can be heated by the heat generation action of the electric drive unit. That is, the urea water can be made less likely to freeze.
Further, a cover 203 is provided on the cover 202, and an operator can access the filler 230 of the urea water tank 200.
Next, fig. 11 and 12 are a plan view and a right side view of upper revolving unit 3 of example 2 showing the arrangement of electric power drive components (inverter 18, step-up/step-down converter 100, and capacitor 19) and urea water tank 200 according to the present embodiment. Hereinafter, the description will be given centering on the differences from example 1.
As shown in fig. 11 and 12, the electric drive unit and the urea water tank 200 are disposed on the right front portion of the upper revolving structure 3 (in front of the fuel tank 160 disposed in the right center portion) in the same manner as in example 1. Specifically, the urea water tank 200 is disposed on the frame 3a adjacent to the front of the fuel tank 160, and the electric drive unit is disposed adjacent to the front of the urea water tank 200.
The electric drive components are configured in a double-layer overlapping manner. Specifically, as shown in fig. 12, a capacitor 19 having a large volume is fixed to a frame 3a of an upper slewing body 3 via a support member 19M including a vibration damping rubber, as in example 1. The capacitor 19 is provided with a mounting table 204 fixed to the frame 3a and elevated from the upper surface of the frame 3 a. The inverter 18 and the step-up/step-down converter 100 are fixed to the upper surface of the mounting table 204 in tandem via a support member 18M and a support member 100M, respectively, each of which includes a vibration damping rubber.
The extraction ports of the harnesses 31, 32 in the inverter 18, that is, the connectors to the harnesses 31, 32 are provided on the left side surface, unlike the case of example 1.
Connectors corresponding to other harnesses (a harness connecting the inverter 18 and the step-up/down converter 100, and a harness connecting the step-up/down converter 100 and the capacitor 19) not shown among the inverter 18, the step-up/down converter 100, and the capacitor 19 are similarly provided on the left side surfaces thereof.
As shown in fig. 11, the harness 31 extending leftward from the inverter 18 is bent at the rear side, and then routed longitudinally from the front to the rear on the left side of the urea water tank 200 and the fuel tank 160, as in example 1. The wire harness 31 is bent to the right at a position rearward of the fuel tank 160, and then wired to be connected to the motor generator 12 disposed at the right rear portion of the upper revolving structure 3.
Similarly to the harness 31, the harness 32 extending rearward from the inverter 18 is bent rearward, and then routed between the urea water tank 200, the fuel tank 160, and the right side frame 180R so as to extend forward and rearward, as in example 1. Further, the wiring is routed so as to be connected to the turning motor 21 disposed near the center of the upper turning body 3 after being bent leftward at a position further rearward than the rear end of the right side frame 180R.
In this way, by providing the connection portion (connector) of the wire harness in the electric drive unit on the left side surface, it is not necessary to provide a space for wiring the wire harness behind the electric drive unit. Therefore, the layout efficiency of the electric drive unit in the front-rear direction can be further improved, and the mounting position of the electric drive unit can be set further rearward. This reduces the possibility of the electric drive unit coming into contact with an obstacle during rotation of the hybrid shovel, thereby further improving the safety of the hybrid shovel. In particular, since the motor generator 12 and the turning motor 21 are driven, electric power having a high voltage and a large current needs to be supplied, and since the wire harnesses connected to the electric power drive unit are thick, they tend to be hard to bend (the bending R that can be set is relatively large). Therefore, the layout efficiency improvement effect by the hybrid shovel according to example 2 is very large.
Next, fig. 13 and 14 are a plan view and a right side view of upper revolving unit 3 of example 3 showing the arrangement of electric power drive components (inverter 18, step-up/step-down converter 100, and capacitor 19) and urea water tank 200 according to the present embodiment. Hereinafter, the description will be given mainly on the differences from examples 1 and 2.
As shown in fig. 13 and 14, the electric drive unit and the urea water tank 200 are disposed in the right front portion of the upper revolving structure 3 (in front of the fuel tank 160 disposed in the right center portion). Specifically, the electric drive unit is disposed adjacent to the front of the fuel tank 160, and the urea water tank 200 is disposed adjacent to the front of the electric drive unit. That is, the front-rear arrangement of the electric drive unit and the urea water tank 200 is reversed from that of example 2.
As shown in fig. 14, the upper end position of the urea water tank 200 disposed on the frame 3a of the upper slewing body 3 is higher than the upper end position of the electric drive unit disposed so as to be overlapped in two layers. Therefore, the cover 202 covering the electric drive assembly and the urea water tank 200 has a step lower in height as the portion covering the electric drive assembly than the portion covering the urea water tank 200.
A storage box 205 for storing an automatic grease feeder including a grease canister, an electric pump, and a grease gun, for example, is disposed in a portion of the cover 202 including the stepped portion, which covers the electric drive unit.
The work of attaching the storage box 205 is performed after the mass production process of inserting the boom pin 4 p.
By disposing the urea water tank 200 in front of the electric drive unit in the right front portion of the upper revolving structure 3 in this manner, the possibility of the electric drive unit coming into contact with an obstacle during the revolution of the hybrid shovel can be further reduced, and the safety of the hybrid shovel can be further improved.
Further, since the fuel tank 160 and the urea water tank 200 storing the liquid are separately disposed, the resistance against the rotation G of the hybrid shovel can be improved as compared with the case where they are disposed at adjacent positions.
Next, fig. 15 and 16 are a plan view and a right side view of upper revolving unit 3 of example 4 showing the arrangement of electric power drive components (inverter 18, step-up/step-down converter 100, and capacitor 19) and urea water tank 200 according to the present embodiment. Hereinafter, the following description will be focused on differences from examples 1 to 3.
As shown in fig. 15 and 16, the electric drive unit and the urea water tank 200 are disposed in the right front portion of the upper revolving structure 3 (in front of the fuel tank 160 disposed in the right center portion). Specifically, the capacitor 19 in the electric drive unit is disposed adjacent to the front of the fuel tank 160 and fixed to the frame 3 a. The capacitor 19 is provided with a mounting table 204 fixed to the frame 3a and elevated from the upper surface of the frame 3 a. The inverter 18 and the step-up/step-down converter 100 in the electric power drive unit, and the urea water tank 200 are arranged in tandem and fixed to the upper surface of the mounting table 204, and are disposed on the capacitor 19. On the mounting table 204, an electric drive unit (the inverter 18 and the step-up/step-down converter 100) is disposed adjacent to the front of the fuel tank 160, and the urea water tank 200 is disposed adjacent to the front of the electric drive unit.
As shown in fig. 16, the upper end position of the urea water tank 200 is higher than the position where the boom pin 4p is inserted, but the front-rear position of the urea water tank 200 is offset from the front-rear position where the boom pin 4p is provided. Therefore, even when the urea water tank 200 is disposed on the capacitor 19, the boom pin 4p can be inserted from the right side when the boom 4 is assembled at the final stage of the mass production process.
In this way, even when the volume of a part of the electric drive unit is large (when the size of the capacitor 19 is large), the urea water tank 200 can be efficiently disposed by disposing the urea water tank 200 on the electric drive unit. Further, by disposing the electric drive unit in a relationship in which the urea water tank 200 is in front and the remaining electric drive unit (the inverter 18 and the step-up/step-down converter 100) is in the rear, it is possible to avoid an influence on the insertion of the boom pin 4 p.
As shown in fig. 15 and 16, the front end position of urea water tank 200 is located forward of the front end position of capacitor 19. Thus, even when the urea water tank 200 is disposed in a part of the electric drive unit (the capacitor 19), the possibility of the electric drive unit contacting an obstacle during rotation of the hybrid shovel can be reduced, and the safety of the hybrid shovel can be improved.
In the present embodiment, the urea water tank 200 can receive heat from the electric drive unit (capacitor 19) from the lower surface in addition to the rear side surface, and therefore the effect of preventing the urea water in the urea water tank 200 from freezing can be further improved.
As shown in fig. 16, the upper end position of the urea water tank 200 disposed on the mounting table 204 is higher than the upper end position of the electric power drive unit (the inverter 18 and the step-up/step-down converter 100) as in example 3. Therefore, the cover 202 covering the electric drive unit and the urea water tank 200 has a step lower in height than the portion covering the urea water tank 200, such as the portion covering the electric drive unit (the inverter 18 and the step-up/step-down converter 100). A storage box 205 is disposed in a portion of the cover 202 covering the electric drive unit including the stepped portion, as in example 3.
Next, fig. 17 and 18 are a plan view and a right side view of upper revolving unit 3 of example 5 showing the arrangement of electric power drive components (inverter 18, step-up/step-down converter 100, and capacitor 19) and urea water tank 200 according to the present embodiment. Hereinafter, the following description will be focused on differences from examples 1 to 4.
As shown in fig. 17 and 18, the electric drive unit and the urea water tank 200 are disposed in the right front portion of the upper revolving structure 3 (in front of the fuel tank 160 disposed in the right center portion) in the same manner as in example 1. Specifically, the urea water tank 200 is disposed on the frame 3a adjacent to the front of the fuel tank 160, and the electric drive unit is disposed adjacent to the front of the urea water tank 200.
The configuration of the electric drive unit is the same as that of example 1. Specifically, as shown in fig. 18, the electric drive components are arranged in a double-layer overlapping. The capacitor 19 having a relatively large volume is fixed to the frame 3a of the upper revolving structure 3 via a support member 19M including a vibration damping rubber. The capacitor 19 is provided with a mounting table 204 fixed to the frame 3a and elevated from the upper surface of the frame 3 a. The inverter 18 and the step-up/step-down converter 100 are fixed to the upper surface of the mounting table 204 in a left-right arrangement via a support member 18M and a support member 100M, respectively, each of which includes a damping rubber.
The extraction ports of the harnesses 31, 32 in the inverter 18, that is, the connectors of the harnesses 31, 32 are provided on the rear side surface (rear end surface) in the same manner as in example 1.
As shown in fig. 17 and 18, since the rear end surface of the inverter 18 as a whole faces the urea water tank 200 in the front-rear direction, the harness 31 extending rearward from the rear end surface of the inverter 18 bypasses the urea water tank 200 and extends toward the rear of the upper revolving structure 3. Specifically, as shown in fig. 17, the harness 31 extending rearward from the rear end of the inverter 18 is bent rightward and then routed from the front to the rear so as to pass right of the urea water tank 200, unlike in example 1, in order to avoid interference with the urea water tank 200. The harness 31 is routed at a right portion passing through the urea water tank 200 at a left-right position between the urea water tank 200 and an outer frame 181 (a component of the frame 3a) longitudinally cutting the right end portion of the upper revolving structure 3. In this example, as shown in fig. 17 (and fig. 20 described later), a space in the left-right direction through which the harness 31 can pass is provided between the urea water tank 200 and the outer frame 181. As shown in fig. 18, 2 guide members 31G for guiding the wiring path of the harness 31 are provided on the right side surface of the urea water tank 200. The harness 31 is held by the guided member 31G at a portion passing through the right side of the urea water tank 200, and is routed to a route low on the rear side. The harness 31 is routed so as to be buried under the urea water tank 200 at a portion passing right of the urea water tank 200, gradually approaching the center side of the upper revolving structure 3 (frame 3a) from front to rear, and passing between the urea water tank 200 and the outer frame 181. The harness 31 extends rearward of the upper revolving structure 3 so as to pass below the urea water tank 200 and the fuel tank 160, and is connected to the motor generator 12.
As described above, the urea water tank 200 of the present embodiment includes the tank main body 200a and the tank storage container 212 (the tank reinforcing member 215 and the tank bracket 226) that stores (fixes) the tank main body 200a, and the guide member 31G is fixed to, for example, the tank storage container 213.
As shown in fig. 17 and 18, a cooling pipe 33 is connected to a rear end surface of the inverter 18, and the cooling pipe 33 circulates cooling water for cooling the inverter 18, the step-up/step-down converter 100, the capacitor 19, and the like. A cooling system for circulating cooling water will be described below with reference to fig. 19.
Fig. 19 is a diagram showing an example of the configuration of a cooling system for circulating cooling water of the inverter 18, the step-up/step-down converter 100, the capacitor 19, and the like.
As shown in fig. 19, the cooling system includes a radiator 191B, a water pump 192B, a capacitor 19, an inverter 18, the step-up/step-down converter 100, and other cooling objects.
Examples of other cooling targets include the motor generator 12, the turning motor 21, and the reduction gear 13. The cooling circuit shown in fig. 19 is an example, and any connection method can be adopted.
Water pump 192B sucks in the cooling water cooled by radiator 191B and discharges the cooling water. The cooling water discharged from the water pump 192B circulates through cooling pipes disposed adjacent to the capacitor 19, the inverter 18, the step-up/step-down converter 100, and another object to be cooled, and returns to the radiator 191B. This cools the capacitor 19, the inverter 18, the step-up/step-down converter 100, and the like.
As shown in fig. 17 and 18, since the rear end surface of the inverter 18 as a whole faces the urea water tank 200 in the front-rear direction as described above, the cooling pipe 33 extending rearward from the rear end surface of the inverter 18 extends toward the rear of the upper revolving structure 3 while bypassing the urea water tank 200. Specifically, as shown in fig. 18, the cooling pipe 33 extending rearward from the rear end surface of the inverter 18 is bent downward and then routed from the front to the rear so as to pass under the urea water tank 200 and the fuel tank 160 in order to avoid interference with the urea water tank 200.
Hereinafter, a portion of the cooling pipe 33 routed below the urea water tank 200 and the fuel tank 160 will be described with reference to fig. 20.
Fig. 20 is a bottom view of a portion of upper revolving unit 3 where urea water tank 200 is disposed.
Although the lower surface of the urea water tank 200 is visible in the drawing, a cover that covers the lower surface of the urea water tank 200 is usually attached to the frame 3 a.
As shown in fig. 20, the frame 3a includes frames 182 and 183 coupled to the outer frame 181 and extending in the left-right direction. The frames 182 and 183 are provided with a predetermined interval in the front-rear direction, and the urea water tank 200 can be observed through a space in the front-rear direction between the frame 182 and the frame 183 by detaching the cover from the frame 3 a.
The urea water tank 200 (specifically, the tank main body 200a) has an outlet (not shown) for discharging urea water therein on the lower surface thereof, and a drain plug 211 for blocking the outlet. Thus, by detaching the cover from the frame 3a, the drain plug 211 can be observed, and the worker can easily approach the drain plug 211 from below the upper slewing body 3 and perform maintenance work on the urea water tank 200.
A space is provided between the front end position of the urea water tank 200 and the rear end position of the frame 182 to some extent, and the cooling pipe 33 extending from the rear end surface of the inverter 18 is bent downward and then buried below the urea water tank 200 through the space (gap). The cooling pipe 33 passing through the lower portion of the urea water tank 200 is provided with a discharge port (not shown) for discharging the cooling water in the cooling pipe 33, and a drain plug 33D for blocking the discharge port. Thus, by detaching the cover from the frame 3a, the drain plug 33D can be observed, and the worker can easily access the drain plug 211 from below the upper slewing body 3 and perform maintenance of the cooling system. By detaching the cover from the frame 3a, the drain plug 211 of the urea water tank 200 and the drain plug 33D of the cooling pipe 33 can be observed at the same time. Therefore, maintenance of both the urea water tank 200 and the cooling system can be performed at the same time, and the maintenance work can be made efficient.
As described above, the harness 31 extending from the rear end of the inverter 18 is buried under the urea water tank 200 through the space (gap) between the outer frame 181 and (the right side surface of) the urea water tank 200.
The harness 31 and the cooling pipe 33 buried below the urea water tank 200 are inserted into a through hole (not shown) provided in the frame 183 and extend to the rear of the upper revolving structure 3.
The storage tank (urea water tank) is disposed in front of the fuel tank behind the power storage device and the drive device. According to this configuration, the storage tank is disposed behind the power storage device and the drive device, which are relatively lower in height than the storage tank, and in front of the fuel tank, which is relatively higher in height than the storage tank, and therefore, the layout of the step-up/down pedal configured at the right front can be easily configured.
A harness for supplying electric power to the motor and a cooling pipe for circulating cooling water of the drive device are connected to a rear end portion of the drive device. At least one of the wire harness and the cooling pipe is provided so as to extend around (bypass) the urea water tank toward the rear portion of the upper slewing body (for example, a position where the assist motor is disposed). Even if the urea water tank is disposed in front of the fuel tank and behind the drive device, the harness and the cooling pipe can be extended and disposed behind the upper revolving structure.
The cooling pipe may also be routed through the underside of the urea water tank. According to this configuration, it is possible to prevent the space in the area between the boom support and the fuel tank from being compressed by adding the urea water tank. The space below the urea water tank is utilized. The driving device is disposed above the power storage device. Therefore, the harness and the cooling pipe connected to the drive device face the urea water tank. Even with this configuration, it is possible to actively detour (bypass) the lower side and the upper side of the urea water tank.
The 1 st outlet of the storage tank and the 2 nd outlet of the cooling pipe are disposed at the same position and covered by 1 cover. By removing the 1 cover, any one of the outlets can be observed at the same time. Further, when the covers are covered with the different covers, it is necessary to remember the cover to be removed corresponding to the maintenance target, but the cover to be removed is determined regardless of the maintenance target, and therefore maintenance is relatively easy.
The harness of the drive device passes through a space for the harness to pass through, which is provided between the urea water tank and the outer frame, and the area between the boom support frame and the fuel tank is not consumed. The wire harness is guided to the lower side of the fuel tank. At this time, the urea water tank is guided so that the rear surface thereof becomes gradually lower by a guide member provided in the urea water tank. The harness is guided to the lower side of the fuel tank from a position above the power storage device, but with this configuration, even if the harness is hard, the harness can be gradually guided to the lower side, and no load is imposed on the harness.
The harness is guided to a lower side of the fuel tank through one side of the urea water tank, and then guided to approach the center side of the revolving frame to some extent. After bypassing (bypassing) the urea water tank, the urea water tank is disposed on the center side as much as possible so as to perform a countermeasure capable of avoiding disturbance applied from one side of the revolving frame.
While the embodiments for carrying out the present invention have been described above in detail, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

Claims (17)

1. A hybrid shovel, comprising:
an upper slewing body;
a cab provided in a left front portion of the upper slewing body;
a diesel engine mounted on a rear portion of the upper slewing body;
an electric motor mounted adjacent to the diesel engine on a rear portion of the upper slewing body and assisting the diesel engine;
a power storage device mounted on a right front portion of the upper slewing body;
a drive device mounted adjacent to the power storage device on a right front portion of the upper slewing body and configured to drive the electric motor by electric power supplied from the power storage device;
an exhaust gas treatment device mounted adjacent to the diesel engine on a rear portion of the upper slewing body, the exhaust gas treatment device treating an exhaust gas of the diesel engine with a treatment agent; and
and a storage tank mounted on a right front portion of the upper slewing body adjacent to the power storage device and the drive device, and storing the treatment agent.
2. The hybrid shovel of claim 1,
the pipe for supplying the treatment agent from the storage tank to the exhaust gas treatment device is locally integrated with a wire harness for supplying electric power from the drive device to the motor.
3. The hybrid shovel of claim 1 or 2,
the storage tank is disposed further forward than at least one of the power storage device and the driving device.
4. The hybrid shovel of claim 1 or 2,
one of the power storage device and the driving device is provided with the other of the power storage device and the driving device and the storage tank.
5. The hybrid shovel of claim 4,
the front end position of the storage tank is located further forward than the front end position of the one of the power storage device and the driving device.
6. The hybrid shovel of claim 1 or 2,
the power storage device and the driving device have a portion connected to a wire harness for supplying electric power to the motor on a left side surface.
7. The hybrid shovel of claim 1,
the storage tank is disposed behind the power storage device and the drive device.
8. The hybrid shovel of claim 7,
a wire harness for supplying power to the motor and a cooling pipe for circulating cooling water of the driving device are connected to a rear end portion of the driving device,
at least one of the wire harness and the cooling pipe bypasses the storage tank and extends from a rear end portion of the drive device toward a rear portion of the upper slewing body.
9. The hybrid shovel of claim 8,
the rear end portion of the drive device is entirely opposed to the storage tank in the front-rear direction,
the cooling pipe bypasses the storage tank in such a manner as to pass through the lower portion of the storage tank.
10. The hybrid shovel of claim 9,
the driving device is disposed above the power storage device.
11. The hybrid shovel of claim 9 or 10,
the storage tank has a 1 st discharge port for discharging the treating agent and a 1 st drain plug for blocking the 1 st discharge port on the lower surface,
the cooling pipe includes a 2 nd discharge port for discharging the cooling water and a 2 nd drain plug for blocking the 2 nd discharge port in a portion passing through the lower portion of the storage tank,
the 1 st drain plug and the 2 nd drain plug can be simultaneously viewed from below the upper slewing body.
12. The hybrid shovel of claim 11,
an opening and a cover covering the opening are provided below the storage tank on the lower surface of the upper revolving body,
by detaching the cover from the lower surface of the upper slewing body, the 1 st drain plug and the 2 nd drain plug can be simultaneously viewed from below the upper slewing body.
13. The hybrid shovel according to any one of claims 8 to 10,
an outer frame longitudinally cut in the front-rear direction is provided at the right end of a revolving frame constituting the lower part of the upper revolving body,
the rear end of the drive device is opposite to the storage tank in the front-rear direction,
the wire harness bypasses the storage tank in such a manner as to pass to the right of the storage tank and pass between the storage tank and the outer frame.
14. The hybrid shovel of claim 13,
a guide member for guiding a wiring path of the wire harness is provided on a right side surface of the storage tank,
the wire harness is guided by the guide member to the right of the storage tank in such a manner that the rear surface becomes lower.
15. The hybrid shovel of claim 13,
the wire harness extends toward the rear of the upper slewing body so as to be close to the center side of the slewing frame, pass between the storage tank and the frame, and pass below a fuel tank disposed rearward of the storage tank and the storage tank.
16. An excavator, having:
an upper slewing body;
a cab provided in a left front portion of the upper slewing body;
a diesel engine mounted on a rear portion of the upper slewing body;
an electric motor;
a power storage device mounted on a right front portion of the upper slewing body;
a drive device mounted on a right front portion of the upper slewing body adjacent to the power storage device and driving the electric motor;
an exhaust gas treatment device mounted adjacent to the engine on a rear portion of the upper slewing body, the exhaust gas treatment device treating an exhaust gas of the engine with a treatment agent; and
a storage tank mounted on a right front portion of the upper slewing body adjacent to the power storage device and the drive device and storing the treatment agent,
the storage tank is disposed further forward than at least one of the power storage device and the driving device.
17. An excavator, having:
an upper slewing body;
a cab provided in a left front portion of the upper slewing body;
a diesel engine mounted on a rear portion of the upper slewing body;
an electric motor;
a power storage device mounted on a right front portion of the upper slewing body;
a drive device mounted on a right front portion of the upper slewing body adjacent to the power storage device and driving the electric motor;
an exhaust gas treatment device mounted adjacent to the engine on a rear portion of the upper slewing body, the exhaust gas treatment device treating an exhaust gas of the engine with a treatment agent; and
a storage tank mounted on a right front portion of the upper slewing body adjacent to the power storage device and the drive device and storing the treatment agent,
the pipe for supplying the treatment agent from the storage tank to the exhaust gas treatment device is locally integrated with a wire harness for supplying electric power from the drive device to the motor.
CN201610515497.XA 2015-07-02 2016-07-01 Hybrid excavator Active CN106320420B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-133813 2015-07-02
JP2015133813 2015-07-02
JP2016-126039 2016-06-24
JP2016126039A JP6776019B2 (en) 2015-07-02 2016-06-24 Excavator

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CN106320420B true CN106320420B (en) 2021-05-25

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103547740A (en) * 2011-02-18 2014-01-29 神钢建设机械株式会社 Hybrid construction machine
CN104755713A (en) * 2013-09-27 2015-07-01 株式会社小松制作所 Work vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5615763B2 (en) * 2011-06-14 2014-10-29 日立建機株式会社 Construction machinery
DE112013000149B4 (en) * 2013-09-25 2018-02-15 Komatsu Ltd. working vehicle
JP5867485B2 (en) * 2013-11-20 2016-02-24 コベルコ建機株式会社 Construction machinery
JP5685679B1 (en) * 2014-02-26 2015-03-18 株式会社小松製作所 Work vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103547740A (en) * 2011-02-18 2014-01-29 神钢建设机械株式会社 Hybrid construction machine
CN104755713A (en) * 2013-09-27 2015-07-01 株式会社小松制作所 Work vehicle

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