CN102699355A - Main shaft connecting device and machine tool - Google Patents
Main shaft connecting device and machine tool Download PDFInfo
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- CN102699355A CN102699355A CN2012101698736A CN201210169873A CN102699355A CN 102699355 A CN102699355 A CN 102699355A CN 2012101698736 A CN2012101698736 A CN 2012101698736A CN 201210169873 A CN201210169873 A CN 201210169873A CN 102699355 A CN102699355 A CN 102699355A
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- main shaft
- mobile
- cutter holder
- connector
- jockey
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Abstract
The invention discloses a main shaft connecting device and a machine tool. The main shaft connecting device comprises a tool holder arranged at the tail end of a main shaft, a movable body sleeved on the main shaft, a first driving mechanism for driving the movable body to axially move, and a second driving mechanism for driving the movable body to rotate, wherein a first top is arranged on the tool holder; a second top is arranged on the movable body; and the first stop and the second stop are axially limited by rotating fit. When the main shaft connecting device provided by the embodiment of the invention is used for changing a tool, the movable body is driven to axially move out first and rotate by a certain angle; the tool holder is mounted at the tail end of the main shaft and then the movable body is driven to rotate by a corresponding angle, and thus axial limitation between the tool holder and the movable body is realized; and finally, the movable body is driven to axially move back, so that the tool holder is tightly fixed at the tail end of the main shaft. The stability of a tensioning force is effectively ensured, the positioning performance of the tool holder (cutter) is improved, the improvement on the processing efficiency is facilitated and the convenience in dismounting, mounting and maintenance is realized.
Description
Technical field
The present invention relates to the machine tool technology field, particularly relate to a kind of main shaft jockey and lathe.
Background technology
In recent years, the demand of complex milling machine tool increases day by day, and complex milling machine tool is fused into one with the function of lathe and milling machine, satisfies the requirement of user to workpiece working (machining) efficiency, process automation to greatest extent.But the operation principle difference of lathe and milling machine is bigger, and lathe generally adopts the workbench rotation, and the non-rotary mode of cutter realizes processing; Milling machine then adopts the cutter rotation, and the non-rotary mode of workbench is processed.For complex milling machine tool, by milling function when being converted into the car function, need milling cutter be unloaded, change lathe tool, and fix to clamp.Therefore, need one badly and be enclosed within the device that clamps lathe tool on the milling spindle.
At present, the cutter of on complex milling machine tool, changing trains, the general mode of directly straining through main shaft that adopts, this mode is simple in structure, but tightening force is not enough, and the cutter positioning is bad, the cutting force that when heavy cut, has the greatest impact, thus influence working (machining) efficiency.
Therefore, how improving to existing cutter clamping mode, need with further adaptation use, is the technical barrier that those skilled in the art need to be resolved hurrily.
Summary of the invention
In view of this, the present invention is intended to propose a kind of main shaft jockey and lathe, to solve the problem that existing cutter clamping mode tightening force is not enough, the cutter positioning is bad.
On the one hand; The invention provides a kind of main shaft jockey; Said main shaft jockey comprises the cutter holder of being located at the main shaft tail end, be sleeved on mobile on the said main shaft, drive axially movable first driving mechanism of this mobile and drive second driving mechanism that this mobile rotates, and wherein, said cutter holder is provided with first stop; Said mobile is provided with second stop, and said first stop and said second stop are through the realization axial limiting that is rotatably assorted.
Further, said first stop is an internal tooth of being located at said cutter holder head, and said second stop is an external tooth of being located at said mobile afterbody.
Further; Said main shaft jockey also comprises with said main shaft relative fixed and is sleeved on the connector in the said mobile, and said second driving mechanism comprises yoke, be located at stroke chamber and slip in the said connector is located at the trip chamber in and passes through the piston rod that said yoke links to each other with said mobile.
Further, the bearing of trend in said stroke chamber and said main shaft is axial vertical.
Further, said second driving mechanism also comprises and is used to detect the sensing device whether said mobile reaches the slewing area limit.
Further; Said connector offers the swing chamber on the sidewall of said mobile; Said sensing device comprises the fork be located in the said mobile and is located in the said swing chamber two on the said fork swaying direction at interval near switch, and said position near switch is corresponding to the slewing area limit of said mobile.
Further; Said main shaft jockey also comprises with said main shaft relative fixed and is sleeved on the connector in the said mobile, and said first driving mechanism comprises by being used to of forming between said connector and the said mobile and supplies first oil pocket that the hydraulic oil forward promotes said mobile and be used to supply reverse second oil pocket that promotes said mobile of hydraulic oil.
Further; The gland that said connector comprises the cutter holder connector and is fixed in this cutter holder connector afterbody; Wherein, form said first oil pocket between said cutter holder connector and the said mobile, form said second oil pocket between said cutter holder connector, said mobile and the said gland.
Further, the tail end face of said gland is provided with the first circumferential limiting tooth, and the head end of said cutter holder is provided with the second circumferential limiting tooth that can be meshed with this first circumferential limiting tooth.
On the other hand, the present invention also provides a kind of lathe, and said lathe is provided with above-mentioned each described main shaft jockey.
Main shaft jockey provided by the invention axially shifts out through the first drive mechanism mobile when being used for tool changing, and turns an angle through the second drive mechanism mobile; The cutter holder that cutter will be installed again is mounted to the tail end of main shaft, makes first stop and the second stop axial misorientation in the mobile on the cutter holder, then through second drive mechanism mobile revolution respective angles; Make first stop and second stop in the mobile on the cutter holder axially stacked, and then realize the axial limiting of cutter holder and mobile, axially retract through the first driving mechanisms control mobile at last; Cutter holder tightly is fixed on the tail end of main shaft; When needs unloaded cutter, reverse operating got final product, compared with prior art; Effectively guaranteed the stability of tightening force; Improved the positioning performance of cutter holder (cutter), help to improve working (machining) efficiency, and dismounting has been easy to maintenance.
Lathe provided by the invention is provided with above-mentioned main shaft jockey, because above-mentioned main shaft jockey has above-mentioned effect, therefore, the lathe that is provided with this main shaft jockey also has the corresponding techniques effect.
Description of drawings
The main shaft jockey that Fig. 1 provides for the embodiment of the invention is in the structural representation when stretching out state in mobile;
Fig. 2 be among Fig. 1 A-A to structural representation;
Fig. 3 be among Fig. 1 B-B to structural representation;
Structural representation when the main shaft jockey that Fig. 4 provides for the embodiment of the invention is in retracted state in mobile;
Fig. 5 be among Fig. 4 C-C to structural representation;
Fig. 6 be among Fig. 4 D-D to structural representation.
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.Should be pointed out that description and the description order to concrete structure only is the explanation to specific embodiment in this part, should not be regarded as that protection scope of the present invention is had any restriction.In addition, under the situation of not conflicting, embodiment and the characteristic among the embodiment in this part can make up each other.
Please be simultaneously referring to figs. 1 to Fig. 6.The main shaft jockey of this embodiment is located on the main shaft 2, mainly comprises ram 1, cutter holder connector 3, mobile 4, gland 5, fairlead 6, cutter holder 9, push rod 11, yoke 13, piston rod 14 and near switch 15 etc.
In conjunction with Fig. 1 and shown in Figure 4; Ram 1 fixed cover is located on the main shaft 2, and mobile 4 is sleeved on the afterbody of main shaft 2, and mobile 4 can rotate and moves axially with respect to main shaft 2; Mobile 4 is a ledge structure; Cutter holder connector 3 is sleeved in the mobile 4 with gland 5, and cutter holder connector 3 is positioned at the end of mobile 4 near ram 1, and gland 5 is positioned at the end of mobile 4 near main shaft 2 tail ends; Cutter holder connector 3 is fixedly connected with ram 1; Gland 5 is fixing with the tail end (be the lower end shown in the figure) of cutter holder connector 3, is formed for supplying hydraulic oil forward (Fig. 1 and shown in Figure 4 be downward direction) to promote first oil pocket of mobile 4 between cutter holder connector 3 and the mobile 4, is formed for supplying second oil pocket of hydraulic oil reverse (Fig. 1 and shown in Figure 4 be the direction that makes progress) promotion mobile 4 between cutter holder connector 3, mobile 4 and the gland 5.
The afterbody of mobile 4 is provided with external tooth 8, and the head of cutter holder 9 is provided with internal tooth 7, referring to Fig. 3 and shown in Figure 6; Internal tooth 7 on external tooth 8 in the mobile 4 and the cutter holder 9 can be through the realization axial limiting that is rotatably assorted, and promptly is in when stretching out state when mobile 4, through with external tooth 8 and internal tooth 7 axial misorientations; The top that can make mobile 4 insert cutter holder 9; Through rotating mobile 4, can make external tooth 8 and internal tooth 7 axially stacked, and then realize axial limiting.
The tail end face of gland 5 is provided with the first circumferential limiting tooth; The head end of cutter holder 9 is provided with the second axial limiting tooth; The first axial limiting tooth can be meshed with the second circumferential limiting tooth and form gear pair 10; Be used to provide the cutting force of cutter when work, prevent that cutter holder 9 from rotating with respect to gland 5 (perhaps the cutter holder connector 3).
In conjunction with Fig. 2 and shown in Figure 5; The sidewall of cutter holder connector 3 contiguous mobiles 4 is provided with stroke chamber 12, and the bearing of trend in stroke chamber 12 is axial vertical with main shaft 2 (perhaps mobile 4), the two ends plug-in mounting push rod 11 in stroke chamber 12; Piston rod 14 is slidingly arranged in two stroke chambeies between the push rod 11; Piston rod 14 links to each other with mobile 4 through yoke 13, makes when piston rod 14 moves in stroke chamber 12, can drive mobile 4 and come the back rotation certain limit.
Cutter holder connector 3 is provided with swing chamber 17 towards the sidewall of mobile 4; Two near switch 15 be located at the swing chamber 17 in; Fork 16 is fixed in the mobile 4, fork 16 can under the drive of mobile 4 said two near the swing chamber 17 between the switch 15 in swing, be located on the swaying direction of fork 16 at interval near switch 15 for two; Each is near the position of the switch 15 slewing area limit corresponding to mobile 4; When fork 16 arrives the position near switch 15, send the signal of telecommunication near switch 15, finally make piston rod 14 stop to move forward.Need to prove that in order to make external tooth 8 and internal tooth 7 from the extremely axial stacked state of axial dislocation state variation, mobile 4 needs to rotate respective angles; That is in order to satisfy above-mentioned requirements, mobile 4 has certain slewing area (corner), and when mobile 4 is in the initial position of this slewing area; Internal tooth 8 is in axial dislocation state with external tooth 7, and when mobile 4 was in the final position of this slewing area, internal tooth 8 was in axial stacked state with external tooth 7; Correspondingly; In order to satisfy above-mentioned needs, fork 16 also should move in this slewing area, is positioned on fork 16 swaying directions two and then is used for detecting when fork 16 reaches initial position or final position near switch 15; Send the signal of telecommunication to peripheral control unit; Executing agency stops to 12 air inlets of stroke chamber and return-air by peripheral control unit control, and then mobile 4 is stopped operating, two slewing area limit (being initial position and final position) that correspond respectively to mobile 4 near switch 15 residing positions.
The use of above-mentioned once main shaft jockey is described below:
When the needs tool changing, (1) is fixedly mounted on cutter on the cutter holder 9 earlier; (2) extremely shown in Figure 3 like Fig. 1; Again according to the direction of arrow X1 signal to the first oil pocket fuel feeding and according to the direction of arrow X2 signal from the second oil pocket oil return; Mobile 4 is moved down until being in the state of stretching out; And to the stroke chamber air inlet of piston rod 14 1 ends and according to the direction of arrow Y2 signal stroke chamber return-air, make mobile 4 turn to primary importance from piston rod 14 other ends according to the direction of arrow Y1 signal; (3) then cutter holder 9 is mounted to the tail end of main shaft 2,, makes cutter holder 9 outer being inserted in the mobile 4 through with external tooth 8 axial misorientations in the internal tooth on the cutter holder 97 and the mobile 4; (4) extremely shown in Figure 6 like Fig. 4; At last according to the direction of arrow Y3 signal from the stroke chamber return-air of piston rod 14 1 ends and according to the stroke chamber air inlet of the direction of arrow Y4 signal from piston rod 14 other ends; Make mobile 4 be turned back to the second place; Make internal tooth 7 and external tooth 8 axially stacked; And according to the direction of arrow X3 signal from the first oil pocket oil return and according to the direction of arrow X4 signal to the second oil pocket fuel feeding, make mobile 4 be moved upward to retracted state, and then realize cutter holder 9 is tightly held.
In the foregoing description,, can also on the end face of gland 5 afterbodys, fairlead 6 be set near the outside in order axially directed effect to be provided to cutter holder 9.
In the foregoing description,, be equipped with the seal member of corresponding size between cutter holder connector 3 and mobile 4, gland 5 and mobile 4 and cutter holder connector 3 and the gland 5 in order to satisfy the needs of sealing.
In the foregoing description, be provided with gear pair between gland 5 and the cutter holder 9, be used for circumferentially spacingly,, among other embodiment, also can adopt other spline part, rotate with respect to gland 5 as long as can prevent cutter holder 9 to strengthen the cutting force of cutter.
Among the above-mentioned various embodiment; Cutter holder connector 3 is fixedly linked to constitute with gland 5 and is sleeved on the connector in the mobile 5, and in other embodiments, cutter holder connector 3 also can be one-body molded with gland 5; Promptly be sleeved in the mobile 4 by single connector; And realize above-mentioned corresponding function, correspondingly, the top of the afterbody of this connector and cutter holder 9 can be provided with corresponding spline part.
Among the above-mentioned various embodiment; Employing is located at the internal tooth 7 of cutter holder 9 heads as first stop; And adopt the external tooth 8 of being located at mobile's 4 afterbodys as second stop; In other embodiments, first stop and second stop can also adopt other forms (for example adopting the form of limited block), as long as can realize axial limiting through being rotatably assorted.
Among the above-mentioned various embodiment; It is similar with the operation principle of conventional oil cylinder to drive movable block 4 axially movable first driving mechanisms, comprises first oil pocket and second oil pocket that are used for fuel feeding or oil return, can be referring to the scheme that has conventional oil cylinder now about the set-up mode of the turnover oil pipe of first oil pocket and second oil pocket; Now do not give unnecessary details; In other embodiments, first driving mechanism also can adopt other forms, is not limited to hydraulic way; For example can also be the frame for movement mode, movable block 4 front and back promoted respective as long as can realize.
Among the above-mentioned various embodiment, the bearing of trend in stroke chamber 12 cardinal principle is axial perpendicular to main shaft 2, and in other embodiments, the bearing of trend in stroke chamber 12 also can be with respect to the axial deflection certain angle of main shaft 2, as long as mobile 4 is turned an angle.
Among the above-mentioned various embodiment; Second driving mechanism that drives movable block 4 rotations is converted into rotatablely moving of mobile 4 through the rectilinear motion with cylinder; The piston rod 14 that comprises yoke 13, is located at stroke chamber 12 in the cutter holder connector 9, slides and be located in the trip chamber 12 and link to each other with mobile 4 through yoke 13; In other embodiments, second driving mechanism can also adopt other forms, rotates respective angles as long as can realize mobile 4.
Among the above-mentioned various embodiment, be used for sensing device that whether detected activity body 4 reach the slewing area limit and comprise the fork of being located in the mobile 4 16 and be located at two of swing 17 both sides, chamber near switch 15, wherein; Fork 16 under the drive of mobile 4 two near the swing chamber 17 between the switch 15 in the swing; And near the position of the switch 15 slewing area limit corresponding to mobile 4, i.e. when mobile 4 turns to primary importance afterbody external tooth and the top internal tooth axial misorientation of cutter holder 9 of mobile 4 (this moment), fork 16 reaches a position near switch 15 simultaneously; Send the signal of telecommunication near switch 15 this moment; This signal of telecommunication is issued peripheral control unit (scheming not shown), and executing agency stops to 12 air inlets of stroke chamber and return-air, when mobile 4 turns to the second place by peripheral control unit control; Situation and above-mentioned similar; In other embodiments, sensing device also can adopt other forms, as long as the rotary state of ability detected activity body 4.
Need explain that the main shaft jockey that above-mentioned various embodiment provide can be combined with existing clamping mode, promptly on the basis of existing tension mode, further improve the stable and positioning performance of cutter (cutter holder).In addition, when need not to use cutter (turning cutting tool), can mobile 4, cutter holder connector 3, gland 5 and cutter holder 9 etc. be taken off from ram 1.
To sum up, the main shaft jockey that above-mentioned various embodiment provide axially shifts out through the first drive mechanism mobile earlier when being used for tool changing; And turn an angle through the second drive mechanism mobile, the cutter holder that cutter will be installed again is mounted to the tail end of main shaft, makes first stop and the second stop axial misorientation in the mobile on the cutter holder; Through second drive mechanism mobile revolution respective angles, make first stop and second stop in the mobile on the cutter holder axially stacked then, and then realize the axial limiting of cutter holder and mobile; Axially retract through the first driving mechanisms control mobile at last, cutter holder tightly is fixed on the tail end of main shaft, when needs unload cutter; Reverse operating gets final product; Compared with prior art, effectively guarantee the stability of tightening force, improved the positioning performance of cutter holder (cutter); Help to improve working (machining) efficiency, and dismounting is easy to maintenance.
The embodiment of the invention also provides a kind of lathe; Complex milling machine tool for example, this lathe is provided with each above-mentioned described main shaft jockey, because above-mentioned main shaft jockey has above-mentioned technique effect; Therefore; The lathe that is provided with this main shaft jockey also should possess the corresponding techniques effect, and its practical implementation process is similar to the above embodiments, does not give unnecessary details now.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. main shaft jockey; It is characterized in that: said main shaft jockey comprises the cutter holder (9) of being located at main shaft (2) tail end, be sleeved on mobile (4) on the said main shaft (2), drive axially movable first driving mechanism of this mobile (4) and drive second driving mechanism that this mobile (4) rotates; Wherein, Said cutter holder (9) is provided with first stop; Said mobile (4) is provided with second stop, and said first stop and said second stop are through the realization axial limiting that is rotatably assorted.
2. main shaft jockey as claimed in claim 1 is characterized in that: said first stop is for being located at the internal tooth (7) of said cutter holder (9) head, and said second stop is for being located at the external tooth (8) of said mobile (4) afterbody.
3. according to claim 1 or claim 2 main shaft jockey; It is characterized in that: said main shaft jockey also comprises with said main shaft (2) relative fixed and is sleeved on the connector in the said mobile (4), the piston rod (14) that said second driving mechanism comprises yoke (13), be located at the stroke chamber (12) in the said connector and slide and be located in the trip chamber (12) and link to each other with said mobile (4) through said yoke (13).
4. main shaft jockey as claimed in claim 3 is characterized in that: the bearing of trend in said stroke chamber (12) is axial vertical with said main shaft (2).
5. main shaft jockey as claimed in claim 3 is characterized in that: said second driving mechanism also comprises and is used to detect the sensing device whether said mobile (4) reaches the slewing area limit.
6. main shaft jockey as claimed in claim 5; It is characterized in that: said connector offers swing chamber (17) on the sidewall of said mobile (4); Said sensing device comprises the fork (16) be located in the said mobile (4) and is located in the said swing chamber (17) two on said fork (16) swaying direction at interval near switch (15), and said position near switch (15) is corresponding to the slewing area limit of said mobile (4).
7. according to claim 1 or claim 2 main shaft jockey; It is characterized in that: said main shaft jockey also comprises with said main shaft (2) relative fixed and is sleeved on the connector in the said mobile (4), and said first driving mechanism comprises by being used to of forming between said connector and the said mobile (4) and supplies first oil pocket that the hydraulic oil forward promotes said mobile (4) and be used to supply reverse second oil pocket that promotes said mobile (4) of hydraulic oil.
8. main shaft jockey as claimed in claim 7; It is characterized in that: the gland (5) that said connector comprises cutter holder connector (3) and is fixed in this cutter holder connector (3) afterbody; Wherein, Form said first oil pocket between said cutter holder connector (3) and the said mobile (4), form said second oil pocket between said cutter holder connector (3), said mobile (4) and the said gland (5).
9. main shaft jockey as claimed in claim 8; It is characterized in that: the tail end face of said gland (5) is provided with the first circumferential limiting tooth, and the head end of said cutter holder (9) is provided with the second circumferential limiting tooth that can be meshed with this first circumferential limiting tooth.
10. lathe, it is characterized in that: said lathe is provided with each described main shaft jockey of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169873.6A CN102699355B (en) | 2012-05-28 | 2012-05-28 | Main shaft connecting device and machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169873.6A CN102699355B (en) | 2012-05-28 | 2012-05-28 | Main shaft connecting device and machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102699355A true CN102699355A (en) | 2012-10-03 |
| CN102699355B CN102699355B (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210169873.6A Expired - Fee Related CN102699355B (en) | 2012-05-28 | 2012-05-28 | Main shaft connecting device and machine tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN102699355B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909397A (en) * | 2012-10-19 | 2013-02-06 | 无锡京华重工装备制造有限公司 | Hand-operated four-station tool changing structure |
| CN109317993A (en) * | 2018-11-21 | 2019-02-12 | 无锡威孚奥特凯姆精密机械有限公司 | Lathe and its tool apron |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558938A (en) * | 1978-10-23 | 1980-05-02 | Mitsubishi Metal Corp | Quick change type tool holder |
| JPS63256328A (en) * | 1987-04-13 | 1988-10-24 | Kuroda Precision Ind Ltd | Tool holder |
| CN1370100A (en) * | 1999-07-09 | 2002-09-18 | 报国株式会社 | Spindle device and tool holder of machine tool |
| CN201244736Y (en) * | 2008-07-09 | 2009-05-27 | 新颖机械工业股份有限公司 | Automatic processing-head changing clamping device for mechanical processing machine tool |
-
2012
- 2012-05-28 CN CN201210169873.6A patent/CN102699355B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558938A (en) * | 1978-10-23 | 1980-05-02 | Mitsubishi Metal Corp | Quick change type tool holder |
| JPS63256328A (en) * | 1987-04-13 | 1988-10-24 | Kuroda Precision Ind Ltd | Tool holder |
| CN1370100A (en) * | 1999-07-09 | 2002-09-18 | 报国株式会社 | Spindle device and tool holder of machine tool |
| CN201244736Y (en) * | 2008-07-09 | 2009-05-27 | 新颖机械工业股份有限公司 | Automatic processing-head changing clamping device for mechanical processing machine tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909397A (en) * | 2012-10-19 | 2013-02-06 | 无锡京华重工装备制造有限公司 | Hand-operated four-station tool changing structure |
| CN109317993A (en) * | 2018-11-21 | 2019-02-12 | 无锡威孚奥特凯姆精密机械有限公司 | Lathe and its tool apron |
| CN109317993B (en) * | 2018-11-21 | 2024-04-02 | 无锡威孚奥特凯姆精密机械有限公司 | Machine tool and tool apron thereof |
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| Publication number | Publication date |
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| CN102699355B (en) | 2014-10-29 |
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Effective date of registration: 20151023 Address after: 201400, Shanghai, Fengxian District, 19 Lang Road, No. 3 Patentee after: SHANGHAI BRANCH OF SANY GROUP CO., LTD. Address before: 201413, No. two, 318 Avenue, Lingang Industrial Park, Shanghai, Fengxian District Patentee before: Seiki Co., Ltd. Shanghai Sany |
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Granted publication date: 20141029 Termination date: 20170528 |