CN102139444A - Device and method for mounting and detecting elevator rope wheel and wheel shaft - Google Patents

Device and method for mounting and detecting elevator rope wheel and wheel shaft Download PDF

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Publication number
CN102139444A
CN102139444A CN2011100075964A CN201110007596A CN102139444A CN 102139444 A CN102139444 A CN 102139444A CN 2011100075964 A CN2011100075964 A CN 2011100075964A CN 201110007596 A CN201110007596 A CN 201110007596A CN 102139444 A CN102139444 A CN 102139444A
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CN
China
Prior art keywords
rope sheave
workbench
oil hydraulic
hydraulic cylinder
elevator rope
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.)
Pending
Application number
CN2011100075964A
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Chinese (zh)
Inventor
王应才
王燕春
戎世文
金桂勇
孔祥军
秦锦华
朱小飞
施晖
金锋
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NANTONG TONGYANG MECHANICAL AND ELECTRICAL MANUFACTURE CO Ltd
Original Assignee
NANTONG TONGYANG MECHANICAL AND ELECTRICAL MANUFACTURE CO Ltd
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 NANTONG TONGYANG MECHANICAL AND ELECTRICAL MANUFACTURE CO Ltd filed Critical NANTONG TONGYANG MECHANICAL AND ELECTRICAL MANUFACTURE CO Ltd
Priority to CN2011100075964A priority Critical patent/CN102139444A/en
Publication of CN102139444A publication Critical patent/CN102139444A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a device and a method for mounting and detecting an elevator rope wheel and a wheel shaft. The device comprises a workbench 1, a radial runout detection device, a bearing mounting device, a shaft mounting device and an axial runout detection device. The method comprises the following steps of: performing rope wheel radial runout detection; pressing and mounting a bearing; pressing and mounting a shaft; and performing rope wheel axial runout detection. By the device and the method, elevator rope wheel radial runout is detected and the bearing and the shaft are mounted in a short time, and the rope wheel axial runout of elevator with the mounted bearing and the shaft is detected at last, so that mounting precision of the bearing and the shaft is improved; and line production is realized, so that working efficiency is greatly improved and production cost is reduced.

Description

Elevator rope sheave wheel shaft installation and measuring device and method
Technical field
The present invention relates to elevator and make the field, is elevator rope sheave wheel shaft erecting device concretely.
Background technology
The high process complexity of elevator rope sheave wheel shaft installation requirement precision at first needs to detect the rope sheave circular runout, then at the rope sheave endoporus bearing is installed, and is installation shaft then, also will detect the rope sheave axial runout at last.At present, the wheel shaft of elevator rope sheave is installed whole complex procedures length consuming time, the installation accuracy of bearing and axle, and the qualification rate of rope sheave axial runout is low, causes using artificial height like this, production efficiency is low.
Summary of the invention
Technical problem to be solved by this invention is, can Fast Installation elevator rope sheave wheel shaft, improve the installation accuracy of bearing and axle, and save the set-up time, and installation cost, a kind of elevator rope sheave wheel shaft installation and measuring device and method is provided.
The inventive system comprises workbench, circular runout checkout gear, bearing erecting device, shaft mounting device and axial runout checkout gear.Circular runout checkout gear, bearing erecting device, shaft mounting device and axial runout checkout gear are arranged from left to right successively along workbench.The circular runout checkout gear comprises that circular runout detects frock axle, hoistable platform A, support A, cylinder A, cylinder A floor push and dial gauge A, cylinder A is located under the table surface, workbench is offered hole, hoistable platform A is located in this hole, cylinder A drives hoistable platform A elevating movement, cylinder A floor push is located at below the workbench, control platform A lifting; Circular runout detects the frock axle and is fixed on the workbench by support A, and circular runout detects the axially parallel with table surface of frock axle, and circular runout detects the radius of the distance of frock axle and workbench greater than the elevator rope sheave; Dial gauge A is set on the support A.The bearing erecting device comprises bearing installation V-arrangement frock, support B, oil hydraulic cylinder A, oil hydraulic cylinder A floor push, gag lever post B and bearing installation limit switch, bearing is installed the V-arrangement frock and is fixed on the workbench by screw, the pressure head of oil hydraulic cylinder A is installed on the workbench by support B, the ram shaft of oil hydraulic cylinder A is to vertical with workbench, when the elevator rope sheave is placed on the workbench, that two limits of V-arrangement frock are installed is tangent fixedly the time with bearing, the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder A is on same straight line; Oil hydraulic cylinder A floor push is located at below the workbench, the pressure head lifting of control oil hydraulic cylinder A; The pressure head periphery of oil hydraulic cylinder A is provided with gag lever post A, gag lever post A moves up and down with the pressure head of oil hydraulic cylinder A, bearing is installed limit switch and is fixed on the workbench, and the contact of limit switch is on the path that gag lever post moves up and down, and bearing is installed limit switch and connected oil hydraulic cylinder A.Shaft mounting device comprises axle installation V-arrangement frock, support C, oil hydraulic cylinder B, oil hydraulic cylinder B floor push, gag lever post B and axle installation limit switch, axle is installed the V-arrangement frock and is fixed on the workbench by screw, the pressure head of oil hydraulic cylinder B is installed on the workbench by support C, the ram shaft of oil hydraulic cylinder B is to vertical with workbench, when the elevator rope sheave is placed on the workbench, that two limits of V-arrangement frock are installed is tangent fixedly the time with axle, the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder B is on same straight line; Oil hydraulic cylinder B floor push is located at below the workbench, the pressure head lifting of control oil hydraulic cylinder B; The pressure head periphery of oil hydraulic cylinder B is provided with gag lever post B, gag lever post B moves up and down with the pressure head of oil hydraulic cylinder B, axle installation limit switch is fixed on the workbench, and the contact of axle installation limit switch is on the path that gag lever post B moves up and down, and an axle installation limit switch connects oil hydraulic cylinder B.The axial runout checkout gear comprises that axial runout detects support, hoistable platform B, dial gauge B, cylinder B and cylinder B floor push, cylinder B is located under the table surface, workbench is offered hole, hoistable platform B is located in this hole, cylinder B drives hoistable platform B elevating movement, cylinder B floor push is located at below the workbench, hoistable platform B lifting; Axial runout detects support and is fixed on the workbench, it is the steel plate that semi arch dress breach is offered in two upper ends that axial runout detects support, the spacing of two block plates is greater than the thickness of elevator rope sheave, the diameter of semi arch is identical with the shaft diameter of elevator rope sheave, two block plate semi arches axially parallel with table surface is provided with dial gauge B on the axial runout detection support.
The precision of dial gauge A and dial gauge B is 0.01mm.
Method of the present invention is:
1) the rope sheave circular runout detects.The elevator rope sheave places on the hoistable platform A, steps on dynamic air cylinder A floor push hoistable platform A is risen, directly the rope sheave endoporus is aimed at frock axle, advance, the probe of dial gauge A is adjacent to the periphery of elevator rope sheave, manually rotate rope sheave, observe the amplitude of fluctuation of pointer; After test is finished, rope sheave is withdrawed from gently, step on dynamic air cylinder A floor push and make cylinder A drive hoistable platform A that the elevator rope sheave is brought back to workbench.
2) pressing bearing.Select for use with the bearing of rope sheave external diameter coupling the V-arrangement frock be installed, promptly when the elevator rope sheave be placed on the workbench, tangent fixedly the time with two limits of bearing installation V-arrangement frock, the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder A is on same straight line.Bearing is installed the V-arrangement frock to be fixed on the workbench by screw, elevator rope sheave endoporus installs jump ring with clasp forceps earlier, after rope sheave is lain in workbench, bearing on the table top is installed have good positioning the automatically pressure head of its endoporus and top oil hydraulic cylinder of V-arrangement frock, and adjusting gag lever post A highly makes the stroke of pressure head satisfy the bearing depression distance.Bearing is placed on the notch of elevator rope sheave.Step on oil hydraulic cylinder A floor push, the pressure head of oil hydraulic cylinder A is slowly depressed, and when gag lever post A reached the contact of bearing installation limit switch, the pressure head of oil hydraulic cylinder A stopped to press down.Unclamp the reset pressure head of oil hydraulic cylinder A of oil hydraulic cylinder A floor push, change an other pressing bearing, the course of work is identical with this step said process.
3) press-fit axle.Select for use with the axle of rope sheave external diameter coupling the V-arrangement frock be installed, promptly when the elevator rope sheave be placed on the workbench, tangent fixedly the time with two limits of axle installation V-arrangement frock, the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder B is on same straight line.Axle is installed the V-arrangement frock to be fixed on the workbench by screw, elevator rope sheave endoporus installs jump ring with clasp forceps earlier, after rope sheave is lain in workbench, have good positioning the automatically pressure head of its endoporus and top oil hydraulic cylinder of V-arrangement frock on the table top is regulated the stroke that gag lever post B highly makes pressure head and is satisfied an axle depression distance.Axle is placed on the bearing mouth.Step on oil hydraulic cylinder B floor push, the pressure head of oil hydraulic cylinder B is slowly depressed, and when gag lever post B reached the contact of an installation limit switch, the pressure head of oil hydraulic cylinder B stopped to press down.Unclamp the reset pressure head of oil hydraulic cylinder B of oil hydraulic cylinder B floor push.
4) sheave shaft is to glitch detection.Will install on the elevator rope sheave hoistable platform B of bearing and axle, step on dynamic air cylinder B floor push hoistable platform B is risen, the elevator rope sheave is placed on axial runout detects on the support, the probe of dial gauge B is adjacent to the side flanges of elevator rope sheave, detect axial runout.After test is finished, rope sheave is put on the hoistable platform B gently, steps on dynamic air cylinder B floor push and make cylinder B drive hoistable platform B that the elevator rope sheave is brought back to workbench.
The invention has the beneficial effects as follows, detect the elevator ropes wheel radial in the short period of time and beat, install bearing, installation shaft, detection at last installs the elevator ropes wheel shaft of bearing and axle to beating, improved the installation accuracy of bearing and axle, continuous productive process, improve operating efficiency greatly, reduced production cost.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the front view of structural representation of the present invention.
Fig. 2 is the vertical view of structural representation of the present invention.
Among the figure, 1, workbench; 2, rope sheave; 3, circular runout detects the frock axle; 4, hoistable platform A; 5, bearing is installed the V-arrangement frock; 6, rope sheave; 7, axle is installed the V-arrangement frock; 8 rope sheaves; 9, axial runout detects support; 10, hoistable platform B; 11, bearing is installed limit switch; 12, bearing; 13, oil hydraulic cylinder A floor push; 14, axle installation limit switch; 15, axle; 16, oil hydraulic cylinder B floor push.
The specific embodiment
In conjunction with the accompanying drawings, below specific embodiments of the invention are elaborated.
The present invention includes workbench 1, circular runout detects frock axle 3, hoistable platform A4, support A, cylinder A, cylinder A floor push, dial gauge A, bearing is installed V-arrangement frock 5, support B, oil hydraulic cylinder A, oil hydraulic cylinder A floor push 13, gag lever post B, bearing is installed limit switch 11, axle is installed V-arrangement frock 7, support C, oil hydraulic cylinder B, oil hydraulic cylinder B floor push 16, gag lever post B, axle installation limit switch 14, axial runout detects support 9, hoistable platform B10, dial gauge B, cylinder B and cylinder B floor push.
Introduce the process of specific embodiments of the invention below.
The elevator rope sheave is placed on the hoistable platform A4, stepping on dynamic air cylinder A floor push rises hoistable platform A4, directly the rope sheave endoporus is aimed at axle, the propelling of frock, the probe of dial gauge A is adjacent to the periphery of elevator rope sheave, manually rotate rope sheave, observe the amplitude of fluctuation of pointer, amplitude of fluctuation is qualified within 10 lattice; After test is finished, rope sheave is withdrawed from gently, step on dynamic air cylinder A floor push and make cylinder A drive hoistable platform A4 that the elevator rope sheave is brought back to workbench 1.
The stroke of limit switch 11 controlled pressure machines is installed with bearing, and mix up pressure, pressure is 1.5MPa, the rope sheave of putting back-up ring well is moved on the workbench 1, make rope sheave endoporus and forcing press oil cylinder center on a line, then ball bearing is placed on the rope sheave notch, guarantee parallel with the notch face, step on oil hydraulic cylinder A floor push 13 until bearing is pressed onto the position, unclamp the pedal pressure head that automatically resets.
Earlier with a stroke of installation limit switch 14 controlled pressure machines, and mix up pressure, pressure is 1MPa, the rope sheave that presses bearing is moved on the workbench 1 of forcing press, axle is put in the bearing mouth, guarantees that axle is vertical with bearing, axle is installed 7 controls of V-arrangement frock makes a center and forcing press oil cylinder center on a line, step on oil hydraulic cylinder B floor push 16 until with axial compression to the position, unclamp oil hydraulic cylinder B floor push 16 and automatically reset.
To install on the elevator rope sheave hoistable platform B10 of bearing and axle, stepping on dynamic air cylinder B floor push rises hoistable platform B10, the elevator rope sheave is placed on axial runout to be detected on the support 9, the probe of dial gauge B is adjacent to the side flanges of elevator rope sheave, detect axial runout, amplitude of fluctuation is qualified within 10 lattice.After test is finished, rope sheave is put on the hoistable platform B10 gently, steps on dynamic air cylinder B floor push and make cylinder B drive hoistable platform B10 that the elevator rope sheave is brought back to workbench 1.

Claims (8)

1. elevator rope sheave wheel shaft installation and measuring device, it is characterized in that, comprise that workbench (1), circular runout checkout gear, bearing erecting device, shaft mounting device and axial runout checkout gear, circular runout checkout gear, bearing erecting device, shaft mounting device and axial runout checkout gear arrange from left to right successively along workbench.
2. elevator rope sheave wheel shaft installation and measuring device according to claim 1, it is characterized in that, described circular runout checkout gear comprises that circular runout detects frock axle (3), hoistable platform A (4), support A, cylinder A, cylinder A floor push and dial gauge A, cylinder A is located under workbench (1) table top, workbench (1) is offered hole, hoistable platform A (4) is located in this hole, cylinder A drives hoistable platform A (4) elevating movement, cylinder A floor push is located at below the workbench (1), control platform A (4) lifting; Circular runout detects frock axle (3) and is fixed on the workbench (1) by support A, and circular runout detects the axially parallel with workbench (1) table top of frock axle (3), and circular runout detects the radius of the distance of frock axle (3) and workbench (1) greater than the elevator rope sheave; Dial gauge A is set on the support A.
3. elevator rope sheave wheel shaft installation and measuring device according to claim 1, it is characterized in that, described bearing erecting device comprises bearing installation V-arrangement frock (5), support B, oil hydraulic cylinder A, oil hydraulic cylinder A floor push (13), gag lever post B and bearing are installed limit switch (11), bearing is installed V-arrangement frock (5) and is fixed on the workbench (1) by screw, the pressure head of oil hydraulic cylinder A is installed on the workbench (1) by support B, the ram shaft of oil hydraulic cylinder A is to vertical with workbench (1), when the elevator rope sheave is placed on the workbench (1), that two limits of V-arrangement frock (5) are installed is tangent fixedly the time with bearing, and the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder A is on same straight line; Oil hydraulic cylinder A floor push (13) is located at below the workbench (1), the pressure head lifting of control oil hydraulic cylinder A; The pressure head periphery of oil hydraulic cylinder A is provided with gag lever post A, gag lever post A moves up and down with the pressure head of oil hydraulic cylinder A, bearing is installed limit switch (11) and is fixed on the workbench (1), and the contact of limit switch is on the path that gag lever post moves up and down, and bearing is installed limit switch (11) and connected oil hydraulic cylinder A.
4. elevator rope sheave wheel shaft installation and measuring device according to claim 1, it is characterized in that, described shaft mounting device comprises axle installation V-arrangement frock (7), support C, oil hydraulic cylinder B, oil hydraulic cylinder B floor push (16), gag lever post B and axle installation limit switch (14), axle is installed V-arrangement frock (7) and is fixed on the workbench (1) by screw, the pressure head of oil hydraulic cylinder B is installed on the workbench (1) by support C, the ram shaft of oil hydraulic cylinder B is to vertical with workbench (1), when the elevator rope sheave is placed on the workbench (1), that two limits of V-arrangement frock (7) are installed is tangent fixedly the time with axle, and the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder B is on same straight line; Oil hydraulic cylinder B floor push (16) is located at below the workbench (1), the pressure head lifting of control oil hydraulic cylinder B; The pressure head periphery of oil hydraulic cylinder B is provided with gag lever post B, gag lever post B moves up and down with the pressure head of oil hydraulic cylinder B, axle installation limit switch (14) is fixed on the workbench (1), the contact of axle installation limit switch (14) is on the path that gag lever post B moves up and down, and an axle installation limit switch (14) connects oil hydraulic cylinder B.
5. elevator rope sheave wheel shaft installation and measuring device according to claim 1, it is characterized in that, described axial runout checkout gear comprises that axial runout detects support (9), hoistable platform B (10), dial gauge B, cylinder B and cylinder B floor push, cylinder B is located under workbench (1) table top, workbench (1) is offered hole, hoistable platform B (10) is located in this hole, cylinder B drives hoistable platform B (10) elevating movement, cylinder B floor push is located at below the workbench (1), hoistable platform B (10) lifting; Axial runout detects support (9) and is fixed on the workbench (1), it is the steel plate that semi arch dress breach is offered in two upper ends that axial runout detects support (9), the spacing of two block plates is greater than the thickness of elevator rope sheave, the diameter of semi arch is identical with the shaft diameter of elevator rope sheave, two block plate semi arches axially parallel with workbench (1) table top is provided with dial gauge B on the axial runout detection support (9).
6. elevator rope sheave wheel shaft installation and measuring device according to claim 2 is characterized in that the precision of described dial gauge A is 0.01mm.
7. elevator rope sheave wheel shaft installation and measuring device according to claim 5 is characterized in that the precision of described dial gauge B is 0.01mm.
8. elevator rope sheave wheel shaft installation and measuring method is characterized in that, concrete steps are:
A) the rope sheave circular runout detects; The elevator rope sheave places on the hoistable platform A (4), step on dynamic air cylinder A floor push hoistable platform A (4) is risen, directly the rope sheave endoporus is aimed at axle, the propelling of frock, the probe of dial gauge A is adjacent to the periphery of elevator rope sheave, manually rotate rope sheave, the amplitude of fluctuation of observing pointer; After test is finished, rope sheave is withdrawed from gently, step on dynamic air cylinder A floor push and make cylinder A drive hoistable platform A (4) that the elevator rope sheave is brought back to workbench (1);
B) pressing bearing; Select for use with the bearing of rope sheave external diameter coupling V-arrangement frock (5) is installed, promptly go up when the elevator rope sheave is placed on workbench (1), that two limits of V-arrangement frock (5) are installed is tangent fixedly the time with bearing, the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder A is on same straight line; Bearing is installed V-arrangement frock (5) to be fixed on the workbench (1) by screw, elevator rope sheave endoporus installs jump ring with clasp forceps earlier, after rope sheave is lain in workbench (1), bearing on the table top is installed have good positioning the automatically pressure head of its endoporus and top oil hydraulic cylinder of V-arrangement frock (5), and adjusting gag lever post A highly makes the stroke of pressure head satisfy the bearing depression distance; Bearing is placed on the notch of elevator rope sheave; Step on oil hydraulic cylinder A floor push (13), the pressure head of oil hydraulic cylinder A is slowly depressed, and when gag lever post A reached the contact of bearing installation limit switch (11), the pressure head of oil hydraulic cylinder A stopped to press down; Unclamp the reset pressure head of oil hydraulic cylinder A of oil hydraulic cylinder A floor push (13), change an other pressing bearing, the course of work is identical with this step said process;
C) press-fit axle; Select for use with the axle of rope sheave external diameter coupling V-arrangement frock (7) is installed, promptly go up when the elevator rope sheave is placed on workbench (1), tangent fixedly the time with two limits of axle installation V-arrangement frock (7), the pressure head axis of the axis of elevator rope sheave and oil hydraulic cylinder B is on same straight line; Axle is installed V-arrangement frock (7) to be fixed on the workbench (1) by screw, elevator rope sheave endoporus installs jump ring with clasp forceps earlier, after rope sheave is lain in workbench, have good positioning the automatically pressure head of its endoporus and top oil hydraulic cylinder of V-arrangement frock on the table top is regulated the stroke that gag lever post B highly makes pressure head and is satisfied an axle depression distance; Axle is placed on the bearing mouth; Step on oil hydraulic cylinder B floor push (16), the pressure head of oil hydraulic cylinder B is slowly depressed, and when gag lever post B reached the contact of an installation limit switch (14), the pressure head of oil hydraulic cylinder B stopped to press down; Unclamp the reset pressure head of oil hydraulic cylinder B of oil hydraulic cylinder B floor push (16);
D) sheave shaft is to glitch detection; To install on the elevator rope sheave hoistable platform B (10) of bearing and axle, stepping on dynamic air cylinder B floor push rises hoistable platform B (10), the elevator rope sheave is placed on axial runout detects on the support (9), the probe of dial gauge B is adjacent to the side flanges of elevator rope sheave, detect axial runout; After test is finished, rope sheave is put on the hoistable platform B (10) gently, steps on dynamic air cylinder B floor push and make cylinder B drive hoistable platform B (10) that the elevator rope sheave is brought back to workbench (1).
CN2011100075964A 2011-01-14 2011-01-14 Device and method for mounting and detecting elevator rope wheel and wheel shaft Pending CN102139444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100075964A CN102139444A (en) 2011-01-14 2011-01-14 Device and method for mounting and detecting elevator rope wheel and wheel shaft

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Application Number Priority Date Filing Date Title
CN2011100075964A CN102139444A (en) 2011-01-14 2011-01-14 Device and method for mounting and detecting elevator rope wheel and wheel shaft

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CN102139444A true CN102139444A (en) 2011-08-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708306A (en) * 2015-03-19 2015-06-17 苏州市吴中区木渎华利模具加工店 Engine belt tightening pulley press fitting machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10332305A (en) * 1997-05-27 1998-12-18 Toshiba Corp Automatic measuring device for turbine gap
CN1891396A (en) * 2005-03-25 2007-01-10 三菱重工业株式会社 System for assembly of a rotating machine
CN101281015A (en) * 2008-04-23 2008-10-08 合肥工业大学 Method for detecting roller completed product
CN101726230A (en) * 2009-11-17 2010-06-09 三一重型装备有限公司 Hydraulic bracket, and device and method for detecting supporting height thereof
CN201707003U (en) * 2010-06-22 2011-01-12 上海依赛工业有限公司 Assembly detecting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10332305A (en) * 1997-05-27 1998-12-18 Toshiba Corp Automatic measuring device for turbine gap
CN1891396A (en) * 2005-03-25 2007-01-10 三菱重工业株式会社 System for assembly of a rotating machine
CN101281015A (en) * 2008-04-23 2008-10-08 合肥工业大学 Method for detecting roller completed product
CN101726230A (en) * 2009-11-17 2010-06-09 三一重型装备有限公司 Hydraulic bracket, and device and method for detecting supporting height thereof
CN201707003U (en) * 2010-06-22 2011-01-12 上海依赛工业有限公司 Assembly detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708306A (en) * 2015-03-19 2015-06-17 苏州市吴中区木渎华利模具加工店 Engine belt tightening pulley press fitting machine

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Application publication date: 20110803