JP4855491B2 - Construction machinery - Google Patents

Construction machinery Download PDF

Info

Publication number
JP4855491B2
JP4855491B2 JP2009083570A JP2009083570A JP4855491B2 JP 4855491 B2 JP4855491 B2 JP 4855491B2 JP 2009083570 A JP2009083570 A JP 2009083570A JP 2009083570 A JP2009083570 A JP 2009083570A JP 4855491 B2 JP4855491 B2 JP 4855491B2
Authority
JP
Japan
Prior art keywords
reducing agent
liquid reducing
agent tank
liquid
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2009083570A
Other languages
Japanese (ja)
Other versions
JP2010236209A (en
Inventor
信行 石井
Original Assignee
住友建機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友建機株式会社 filed Critical 住友建機株式会社
Priority to JP2009083570A priority Critical patent/JP4855491B2/en
Publication of JP2010236209A publication Critical patent/JP2010236209A/en
Application granted granted Critical
Publication of JP4855491B2 publication Critical patent/JP4855491B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Description

  The present invention relates to a construction machine, and more particularly, to a construction machine equipped with a liquid reducing agent tank storing a liquid reducing agent.

  In recent years, construction equipment such as hydraulic excavators equipped with diesel engines has been equipped with exhaust gas treatment devices in the exhaust system of diesel engines to meet higher exhaust gas regulations. Is released into the atmosphere through the NOx reduction catalyst provided in

  Conventionally, as this kind of exhaust gas treatment apparatus, a urea selective reduction type NOx treatment apparatus using a urea aqueous solution (liquid reducing agent) is often adopted, and the urea aqueous solution is stored in a metallic liquid reducing agent tank. Further, the liquid reducing agent tank is connected to an exhaust pipe by a liquid reducing agent supply pipe, and is configured so that an aqueous urea solution in the liquid reducing agent tank can be supplied to the exhaust pipe by a liquid reducing agent supply pump (for example, , See Patent Document 1).

JP 2003-20936 A

  The liquid reducing agent tank is installed in a narrow space of the upper swing body. Therefore, when the aqueous solution of urea is supplied to the liquid reducing agent tank or when maintenance work is performed on the liquid reducing agent tank, the operator is forced to take an unnatural work posture. There was a problem that workability and maintenance workability were not good.

  In addition, the urea aqueous solution stored in the metal liquid reducing agent tank is likely to be frozen when the temperature is below freezing, and when it is frozen, the urea aqueous solution cannot be used as the liquid reducing agent.

  In order to prevent the urea aqueous solution from freezing, for example, the liquid reductant tank may be heated with an electric heater to increase the heat retaining performance. However, with this configuration, the structure becomes complicated and the equipment cost increases. The consumption of electrical energy increases.

  Therefore, there is a technical problem to be solved in order to improve water supply, maintenance performance and heat retention of the liquid reducing agent tank without complicating the configuration, and the present invention solves this problem. With the goal.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a pair of left and right work implement mounting support brackets are erected on the front portion of the swivel frame, and the liquid reduction In a construction machine equipped with a liquid reducing agent tank storing an agent, the liquid reducing agent tank is installed beside a turning motor in a space between the pair of left and right support brackets. I will provide a.

According to this configuration, the liquid reducing agent tank is a space between the pair of left and right support brackets erected on the front portion of the swivel frame, and is disposed so as to be lateral to the swivel motor. ing. Therefore, when the liquid reducing agent tank is replenished or when the liquid reducing agent tank is maintained, the work can be easily performed from above the space portion of the support bracket.

  The invention according to claim 1 can be easily and quickly performed from above the support bracket when replenishing the liquid reducing agent tank or when performing maintenance of the liquid reducing agent tank. Water supply and maintainability of the liquid reducing agent tank can be improved.

  During operation of the construction machine, the liquid reducing agent tank is warmed by heat radiation from the turning motor. Accordingly, the heat retention of the liquid reducing agent tank can be improved without providing a heater, and the liquid reducing agent can be prevented from freezing while the configuration is simple.

The side view of the hydraulic excavator (construction machine) which shows one Example of this invention. The top view which shows the upper turning body of the hydraulic shovel which concerns on one Example. The perspective view explaining the installation location of the tank for liquid reducing agents which concerns on one Example.

  In the present invention, in order to achieve the purpose of improving the water supply, maintenance performance and heat retention of the liquid reducing agent tank, a pair of left and right work equipment mounting support brackets are erected on the front of the swivel frame, In addition, in a construction machine equipped with a liquid reducing agent tank that stores the liquid reducing agent, the liquid reducing agent tank is installed beside the swivel motor in the space between the pair of left and right support brackets. did.

  A preferred embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a hydraulic excavator as an example of a construction machine. As shown in the figure, an upper swing body 2 is mounted on the lower traveling body 1 so as to be capable of swinging, and a cab 3 is provided on one front side of the upper swing body 2. In addition, the boom 4 is pivotally attached to the front center portion of the upper swing body 2 so that the boom 4 can be raised and lowered, and an arm 5 is connected to the distal end portion of the boom 4 so as to be rotatable up and down. A bucket 6 is attached so as to be rotatable up and down.

  As shown in FIG. 2, an engine room 7 is formed at the rear of the upper swing body 2, and a diesel engine 8 is installed in the engine room 7. A cooling fan 12 is provided in front of the diesel engine 8 (front side in FIG. 2), and a heat exchanger unit 13 including a radiator and the like is installed in front of the cooling fan 12.

  Further, an exhaust pipe 9 is connected to the diesel engine 8, and an exhaust gas treatment device 10 is installed on the downstream side of the exhaust pipe 9 in order to comply with higher-order exhaust gas regulations. As the exhaust gas treatment apparatus 10 according to the present embodiment, a urea selective reduction type NOx treatment apparatus using a urea aqueous solution (liquid reducing agent) is adopted.

  As shown in FIG. 3, a pair of left and right boom mounting support brackets 17, 17 are erected on the front portion of the swing frame 14 of the upper swing body 2, and a swing motor is interposed between the support brackets 17, 17. 16 is provided. Further, a metal liquid reducing agent tank 11 is disposed laterally (in the left-right width direction of the body, that is, the LR direction in FIG. 3) of the turning motor 16 in the space in the pair of left and right support brackets 17 and 17. The liquid reducing agent tank 11 is formed in a flat box shape.

  Further, an aqueous urea solution is stored in the liquid reducing agent tank 11. The liquid reducing agent tank 11 is connected to the exhaust gas treatment device 10 via a liquid reducing agent supply pipe (not shown).

  The material of the liquid reducing agent tank 11 is not limited to a metal material such as iron but may be a synthetic resin material. For example, the liquid reducing agent tank 11 can be made of polyethylene resin having a required heat insulating property. The shape of the liquid reducing agent tank 11 is not limited to a box shape, and can be set to an arbitrary shape depending on conditions such as installation space.

  In this embodiment, a water supply port (not shown) is opened on the upper surface of the liquid reducing agent tank 11, and a cap 19 is attached to the water supply port. Reference numeral 18 denotes an inclined plate fixed to the inner surfaces of the front portions of the support brackets 17 and 17.

  As described above, according to the present invention, the liquid reducing agent tank 11 is installed in the space between the pair of left and right support brackets 17, 17 erected on the front part of the swivel frame 14. The space part (dead space) between 17 can be used effectively.

  Further, since the liquid reducing agent tank 11 is installed on the side of the turning motor 16, a large working space is secured above the liquid reducing agent tank 11. Therefore, when the urea aqueous solution is replenished to the water supply port of the liquid reducing agent tank 11, the urea aqueous solution can be replenished easily and quickly from above the liquid reducing agent tank 11.

  In addition, when the maintenance and inspection of the liquid reducing agent tank 11 is performed, it can be easily and quickly performed from above the liquid reducing agent tank 11 as described above. Thus, according to the present invention, not only the water supply of the liquid reducing agent tank 11 is improved, but also the maintainability of the liquid reducing agent tank 11 is improved.

  Further, when the liquid reducing agent tank 11 is made of metal, heat is released from the turning motor 16 during operation of the hydraulic excavator, and thus the liquid reducing agent tank 11 is warmed by this heat. As a result, the heat retention of the liquid reducing agent tank 11 is improved without providing a heating device such as a heater in the liquid reducing agent tank 11. Therefore, it is possible to prevent the urea aqueous solution in the liquid reducing agent tank 11 from being frozen even in a cold state, although the configuration is simple.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  The present invention can also be applied to a construction machine equipped with a liquid reducing agent tank in which a liquid reducing agent other than an aqueous urea solution is stored in the liquid reducing agent tank.

2 Upper swing body 7 Engine room 8 Diesel engine 10 Exhaust gas treatment device 11 Liquid reducing agent tank 14 Swing frame 16 Swing motor 17 Support bracket

Claims (1)

  1. In a construction machine in which a support bracket for mounting a pair of left and right work machines is erected on the front portion of the revolving frame, and a liquid reducing agent tank storing a liquid reducing agent is mounted, the liquid reducing agent tank is A construction machine characterized in that it is installed on a side of a turning motor in a space between a pair of left and right support brackets.
JP2009083570A 2009-03-30 2009-03-30 Construction machinery Active JP4855491B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009083570A JP4855491B2 (en) 2009-03-30 2009-03-30 Construction machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009083570A JP4855491B2 (en) 2009-03-30 2009-03-30 Construction machinery

Publications (2)

Publication Number Publication Date
JP2010236209A JP2010236209A (en) 2010-10-21
JP4855491B2 true JP4855491B2 (en) 2012-01-18

Family

ID=43090795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009083570A Active JP4855491B2 (en) 2009-03-30 2009-03-30 Construction machinery

Country Status (1)

Country Link
JP (1) JP4855491B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5949793B2 (en) * 2014-01-17 2016-07-13 コベルコ建機株式会社 Construction machinery

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4243772B2 (en) * 2000-03-22 2009-03-25 日立建機株式会社 Switching valve arrangement structure for construction machinery
JP2003020936A (en) * 2001-07-03 2003-01-24 Komatsu Ltd ARRANGEMENT STRUCTURE FOR LIQUID REDUCING AGENT TANK FOR NOx REDUCTION CATALYST
JP2008240676A (en) * 2007-03-28 2008-10-09 Komatsu Ltd Construction vehicle
JP5273933B2 (en) * 2007-03-28 2013-08-28 株式会社小松製作所 Construction vehicle
JP4966100B2 (en) * 2007-05-31 2012-07-04 日立建機株式会社 Construction machinery
KR20100033482A (en) * 2007-06-26 2010-03-30 히다치 겡키 가부시키 가이샤 Self-propelled construction machine

Also Published As

Publication number Publication date
JP2010236209A (en) 2010-10-21

Similar Documents

Publication Publication Date Title
JP5990257B2 (en) Construction machinery
EP2053167B1 (en) Hybrid working vehicle
EP2248695B1 (en) Construction machine
JP5460931B1 (en) Excavator
JP5101324B2 (en) Arrangement structure of NOx reduction device for construction machinery
CN103797192B (en) Reducing agent tank and working truck
US8544584B2 (en) Construction vehicle
WO2011033732A1 (en) Construction machine
JP5234693B2 (en) Construction machinery
EP2752327A1 (en) Construction vehicle equipped with exhaust-gas post-processing device
EP2896753B1 (en) Reducing agent tank arrangement in a construction machine
JPWO2009101935A1 (en) Construction machinery
US8857557B2 (en) Work vehicle
JP4679605B2 (en) Hydraulic hose routing device for hanging grapple
WO2011152223A1 (en) Operation machine
EP1489234A1 (en) Small swing type shovel
US9187877B2 (en) Machine body and machinery
JP4738305B2 (en) Inside structure of traveling vehicle bonnet
US9388725B2 (en) Reducing agent tank and work vehicle
JP6009063B2 (en) Work vehicle
JP5996449B2 (en) Construction machinery
US8985262B2 (en) Construction vehicle equipped with exhaust aftertreatment device
WO2014065023A1 (en) Cooling structure for urea aqueous solution conduit
EP2821613A1 (en) Ventilation structure for engine compartment
JP6175405B2 (en) Construction machinery

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20111019

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111025

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141104

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4855491

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111026