CN104722839A - Amplitude modulation type security saw - Google Patents
Amplitude modulation type security saw Download PDFInfo
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- CN104722839A CN104722839A CN201310728546.4A CN201310728546A CN104722839A CN 104722839 A CN104722839 A CN 104722839A CN 201310728546 A CN201310728546 A CN 201310728546A CN 104722839 A CN104722839 A CN 104722839A
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- coverboard
- saw
- sliding axle
- screw
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Abstract
The invention discloses an amplitude modulation type security saw which is composed of a shell, a driving mechanism, an amplitude modulation mechanism, a saw blade clamping device and a telescopic saw bow. A motor in the driving mechanism drives an eccentric pin through synchronous belt drive and gear drive as crank motion; the eccentric pin, a slider A, a chute, a short slide shaft and a short slide shaft support form a crank double-slider mechanism, and the short slide shaft is driven to linearly reciprocate through the eccentric pin; the amplitude modulation mechanism is capable of amplifying or lessening motion amplitudes of the short slide shaft by adjusting an amplitude modulation shaft in position and transmitting the motion amplitudes to a long slide shaft; a saw blade is mounted at one end of the long slide shaft through the saw blade clamping device which drives the saw blade to linearly reciprocate. The telescopic saw bow can be adjusted in telescopic length according to application scenarios, and the saw blade is well guided and supported through a pulley.
Description
Technical field
The present invention relates to a kind of safety saw, especially for the amplitude modulation safety saw of rescue, belong to the emergency relief instrument of trapped personnel in the situations such as daily life contingency, traffic accident, earthquake.
Background technology
In the contingency such as machine operation error, traffic accident in daily life, the nipped situation of frequent generation human body, current rescue mode majority adopts the cutting tools such as cutting machine, cut off by the object such as metal, concrete clamping human body, nipped limbs are freed.General jammed human body has contrafluxion distortion, swelling, hard object and human contact tight, need gap can not be had to exist between the object of cutting and skin, this just determines in the process of cutting hard object, cutting tool inevitably will contact human body skin, but the tool motion speed of current cutting tool and amplitude are all very large, when damaging after tool contact to human body.Therefore, for preventing the instrument used in rescue operations from damaging human body, emergency crew operations's extreme care is careful, and job schedule is slow, and efficiency is low.
Most important in rescue is exactly the time as far as possible shortening rescue, also will ensure by the personal safety of rescuer.In the case, design a kind of safe cutting saw, both the cutting task to the object such as metal, concrete can have been completed rapidly, can ensure timely and effectively again to be rescued the personal safety of people, alleviate the misery of saved person and the rescue pressure of fire fighter simultaneously, the rescue work under this type of fortuitous event is had great importance.
The cutter tooth motion mode of conventional sawtooth class cutting tool has the modes such as dead axle circular-rotation, dead axle circle swing, horizontal rectilinear motion, but no matter be which kind of mode, their incision principle is all the same, namely by carrying out relative motion under a certain pressure between cutter tooth and cut object, material to be cut surface is cut, so repeatedly, until cut object is completely cut-off.
In the process of the material such as cutting metal, concrete, because material deformation is very little, negligible compared with the displacement of cutter tooth, under a certain pressure, body surface is directly cut by sawtooth with chip or clastic and peels off, at cutting soft objects (as human body, clothing etc.) in process, when cutter tooth touches soft objects surface, when cutter tooth motion amplitude is less, move with cutter tooth in soft objects surface, and before sawtooth, form less protuberance, Relative friction is not had because of between the body surface that cutter tooth contacts with it, body surface is not cut, along with cutter tooth continues motion, body surface also moves with cutter tooth, the distortion of body surface increases thereupon, when deforming more than its limit, can not continue to move with cutter tooth in soft objects surface, therebetween produce relative motion and cut.
Therefore, in working angles, if the motion amplitude of cutter tooth is less than the limit of skin deformation, between cutter tooth cutting edge and contact skin surface, relative cutting movement can not be there is.If the unidirectional small movements of simple cutter tooth, although can ensure can not injured skin, but effectively cannot cut objects such as metals, for addressing this problem, cutter tooth can be allowed to carry out faster reciprocal motion, thus realize skin surface in cutting process and be only out of shape and be not cut, but can cut objects such as metals in this process.
Although make cutter carry out cutting with less reciprocation amplitude can ensure human-body safety, but cutting efficiency is lower, if the motion amplitude of cutter is adjustable, selects the tool motion amplitude varied in size according to the distance of cutting position distance human body, just can take into account efficiency and the security of rescue.
Summary of the invention
Object of the present invention, is to provide a kind of amplitude modulation safety saw for emergency relief, adopts this safety saw can be sued and laboured fast when the personal safety of people rescues in guarantee, thus alleviates the misery of saved person and the rescue pressure of fire fighter.
The object of the present invention is achieved like this: a kind of amplitude modulation safety saw, comprises housing, transmission mechanism, amplitude regulating mechanism, saw blade fixture and scalable saw bow five part.
Described housing comprises left coverboard, right coverboard, upper coverboard, lower coverboard, front coverboard, rear coverboard and handle, and left coverboard and right coverboard have the chute of accommodation and fixed amplitude conciliation axle.
The electric machine support of described transmission mechanism, gear shaft support and the short sliding axle support of amplitude regulating mechanism, long sliding axle support are fixed on left coverboard and right coverboard by screw; In transmission mechanism, utilize synchronous pulley and Timing Belt that the rotation of electric machine main shaft is passed to pinion shaft, the gear parts of pinion shaft engages with gear wheel, and gear wheel is fixed with bearing pin axle bed, cam pin is assemblied in axis pin base, and cam pin is provided with slide block A.
In described amplitude regulating mechanism, short sliding axle is provided with chute, match with the circular hole of short sliding axle support in the two ends of short sliding axle, axis pin base, cam pin, slide block A, chute, short sliding axle and short sliding axle support define crank double-slider mechanism, and the short-and-medium sliding axle of electric machine rotation process carries out linear reciprocating motion; Straight pin and slide block B are installed, the column part at two ends and long sliding axle support assorted in the middle part of long sliding axle; Fork-shaped fork one end is connected with short sliding axle by straight pin, and the slotted section of the other end coordinates with slide block B; In the position of fork-shaped fork between short sliding axle and long sliding axle, amplitude adjusted axle is installed, amplitude adjusted axle is installed with fork-shaped fork U-lag to the slide block C coordinated, slide block C is located by sleeve, amplitude adjusted axle by briquetting and wing nut can be fixed on left coverboard and right coverboard open the optional position of chute; By the position of adjusting range regulating shaft, after fork-shaped fork can be utilized the straight-line displacement of short sliding axle to be zoomed in or out, be transmitted to long sliding axle, realize amplitude adjustment.
In described saw blade fixture, branch sleeve is connected with one end of long sliding axle, and by straight pin, right briquetting, left briquetting are installed in branch sleeve, saw blade is installed between right briquetting and left briquetting, and is strained right briquetting and left briquetting with fixing saw blade by screw.
Described scalable saw bow comprises saw bow pressing plate, saw bow slide bar, saw bow depression bar, pulley, screw, nut, and saw bow pressing plate is fixed on coverboard; Saw bow slide bar can slide in the groove of saw bow pressing plate, and is fixed on optional position by lock-screw; Saw bow depression bar is connected with saw bow slide bar by screw; The lower end of saw bow depression bar is provided with pulley by screw, nut, plays guiding and supporting role to saw blade.
Amplitude modulation safety saw of the present invention have employed above technical scheme, has the following advantages and feature:
1, by changing the straight reciprocating motion amplitude of position adjustable saw blade of adjustment axle, when cutting position is away from human body, adjustment axle is fixed on left coverboard, right coverboard open the upper end of chute, adopt larger motion amplitude to cut, to improve cutting efficiency; When cutting to the position of closely human body, adjustment axle is fixed on left coverboard, right coverboard open the lower end of chute, adopt little tool motion amplitude to cut, to ensure personal safety;
2, saw blade carries out straight reciprocating motion, can cut at small space;
3, telescopic saw bow according to the size adjustment extension elongation in rescue space, can form good support and guiding when applicable cleavable site operating space to saw blade.
Accompanying drawing explanation
Fig. 1 is the front appearance structure chart of amplitude modulation safety saw of the present invention.
Fig. 2 is the back appearance structure chart of amplitude modulation safety saw of the present invention.
Fig. 3 is handle installation structure figure.
Fig. 4 is the structure chart of the amplitude modulation safety saw of the present invention without housing.
Fig. 5 is the Facad structure figure of transmission mechanism.
Fig. 6 is the structure figure of transmission mechanism.
Fig. 7 is the mounting structure figure of gear wheel.
Fig. 8 is the structure chart of amplitude regulating mechanism.
Fig. 9 is the structure chart of saw blade fixture.
Figure 10 is the sectional view of saw blade fixture.
Figure 11 is the structure chart of scalable saw bow.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention is a kind of amplitude modulation safety saw for emergency relief, is made up of housing, transmission mechanism, amplitude regulating mechanism, saw blade fixture and scalable saw bow five part.
Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the housing of safety saw comprises a coverboard left side 101, right coverboard 102, upper coverboard 103, lower coverboard 104, front coverboard 105 and rear coverboard 106 and forms, and wherein goes up coverboard 103, lower coverboard 104, front coverboard 105 be connected with left coverboard 101 and right coverboard 102 by screw with rear coverboard 106.Rear coverboard 106 is provided with handle 107, rear coverboard 106 and handle 107 have circular hole, for the power line through motor 201.The short sliding axle support A303 of the electric machine support 202 of transmission mechanism, gear shaft support 209 and amplitude regulating mechanism, short sliding axle support B304, long sliding axle support A308 and long sliding axle support B309 are all fixed on left coverboard 101 and right coverboard 102 by screw.Left coverboard 101 and right coverboard 102 have the chute holding amplitude adjusted axle 313 and briquetting 316.
Refer to Fig. 5, Fig. 6 and Fig. 7, motor 201 is fixed on electric machine support 202 by screw, and motor shaft is provided with synchronous pulley A203, fixes back-up ring 204 at motor shaft ends by screw, for the axial location of synchronous pulley A203.Pinion shaft 208 is provided with synchronous pulley B206, in pinion shaft 208 end, the back-up ring B207 for synchronous pulley B206 axial location is also installed, Timing Belt 205 is installed between synchronous pulley A203 and synchronous pulley B206.Be connected by bearing 219 between pinion shaft 208 with gear shaft support 209, catch A210 and catch B211 is used for the axial location of bearing 219, and Large Gear Shaft 218 is connected with gear wheel 212 by bearing 220.Gear wheel 212 is provided with balancing weight 216, for the short-and-medium sliding axle of balanced magnitude governor motion 301 and the reciprocating inertia force of long sliding sliding axle 307, in addition, gear wheel 212 is provided with axis pin base 213 by screw, for setting-up eccentricity pin 214, eccentric distance between cam pin 214 and gear wheel 212 axis is 2.5 millimeters, and balancing weight 216 and axis pin base 213 acting in conjunction realize the axial location of gear wheel 212.Cam pin is provided with slide block A215.
Refer to Fig. 8, short sliding axle 301 is installed the chute 302 coordinated with slide block A215 by screw, the column part at short sliding axle 301 two ends coordinates with the circular hole of short sliding axle support A303 and short sliding axle support B304 respectively.Short sliding axle 301 is connected with fork-shaped fork 306 by straight pin A305.Tension block 312 is installed by screw in the end of fork-shaped fork 306.The middle part of long sliding axle 307 is provided with straight pin B310, and straight pin B310 installs slide block B 311, and the U-lag of fork-shaped fork 306 coordinates with slide block B 311.The column part at long sliding axle 307 two ends coordinates with the circular hole of long sliding axle support A308 and long sliding axle support B309 respectively.Between short sliding axle 301 and long sliding axle 307, install amplitude adjusted axle 313, amplitude adjusted axle 313 is provided with slide block C314, slide block C314 matches with the U-lag of fork-shaped fork 306.Installing sleeve 315 on amplitude adjusted axle 313, for the axial location of slide block C314, amplitude adjusted axle 313 is also provided with briquetting 316 and wing nut 317, tighten wing nut 317, the squared ends of amplitude adjusted axle 313 and briquetting 316 are compressed with the chute of left coverboard 101 and right coverboard 102 respectively, amplitude adjusted axle 313 can be fixed on the optional position in the chute of left coverboard 101, right coverboard 102.Saw blade fixture is installed in one end of long sliding axle 307.
Refer to Fig. 9 and Figure 10, saw blade fixture comprises saw blade 401, branch sleeve 402, right briquetting 403, left briquetting 404, screw 405, straight pin 406 and holding screw 407.Branch sleeve 402 is connected with long sliding axle 307 by screw thread, and it is inner that right briquetting 403 and left briquetting 404 are installed on branch sleeve 402 by straight pin 406.When clamping saw blade 401, saw blade 401 is inserted between right briquetting 403 and left briquetting 404, and the hole circular hole on saw blade 401 aimed on right briquetting 403 and left briquetting 404, then screw in screw 405 and tighten, utilizing the pulling force of screw 405 that saw blade 401 is clamped by right briquetting 403 and left briquetting 404.
Refer to Fig. 1 and Figure 11, described scalable saw bow comprises saw bow pressing plate 501, lock-screw 502, saw bow slide bar 503, saw bow depression bar 504, pulley 505, screw 506 and nut 507.Saw bow pressing plate 501 is fixed on coverboard 103, saw bow slide bar 503 is arranged in the groove of saw bow pressing plate 501, one end of saw bow slide bar 503 is connected with saw bow depression bar 504 by screw, is provided with pulley 505, pulley 505 has groove in the lower end of saw bow depression bar 504 by screw 506 and nut 507.After unclamping nut 507, the adjustment position of screw 506 in chute, can ensure that the groove of pulley 505 suitably contacts with saw blade 401, realize the good guiding of pulley 505 pairs of saw blades 401 and supporting role.Saw bow pressing plate 501 is provided with lock-screw 502, after unclamping lock-screw 502, saw bow slide bar 503 can stretch in groove, can tighten lock-screw 502 and be fixed after moving saw bow slide bar 503 to required appropriate location.
Amplitude modulation safety saw of the present invention, after turning on the power switch, the synchronous pulley A203 being arranged on motor 201 output shaft drives pinion shaft 208 to rotate by Timing Belt 205 and synchronous pulley B206, pinion shaft 208 drives gear wheel 212 to rotate, gear wheel 212 drives cam pin 214 to move as bent axle by axis pin base 213, under the guide effect of the circular hole of short sliding axle support A303 and short sliding axle support B304, cam pin 214 drives short sliding axle 301 to move back and forth vertically by slide block A215 and chute 302.In short sliding axle 301 reciprocatory movement, fork-shaped fork 306 is driven to swing around amplitude adjusted axle 313 by straight pin A305, fork-shaped fork 306 drives long sliding axle 307 to move by slide block B 311 and straight pin B310 simultaneously, under the guide effect of the circular hole of long sliding axle support A308 and long sliding axle support B309, long sliding axle 307 is also move back and forth along axis, thus long sliding axle 307 drives saw blade 401 linear reciprocating motion by saw blade fixture and cuts.
In the present invention, according to the chute on the left coverboard 101 of design and right coverboard 102, the size of each correlated parts such as length of U-lag on fork-shaped fork 306, the position of adjusting range regulating shaft 313 in chute, can make saw blade 501 reciprocation amplitude continuously adjustabe between 1 ~ 25 millimeter.Record through actual cutting experiment, as reciprocating frequency about 20 ~ 30Hz and amplitude is less than 2.5 millimeters time, generally can not damage human body when saw blade 401 contacts skin.The reciprocating motion margin of safety of corresponding 2.5 millimeters, the saw blade of groove is engraved at the chute edge of left coverboard 101 and right coverboard 102, groove above position correspondence by a relatively large margin, scale with the corresponding less margin of safety of upper/lower positions so that carry out the setting of saw blade motion amplitude in rescue operations according to cutting position.When adjusting the motion amplitude of saw blade 401, first unclamping wing nut 317, then promoting amplitude adjusted axle 313 to desired location along chute, again tighten wing nut 317 and amplitude adjusted axle 313 is fixed, namely complete the adjustment of saw blade 401 motion amplitude.
Amplitude modulation safety saw of the present invention, can be made into tandem product, and with the demand of satisfied difference rescue occasion, such as, development small-sized safety saw, can be used for the rescue when positions such as finger, arm are clamped by objects such as thinner reinforcing bars; For the rescue in serious accident, earthquake disaster, can be made into high-power safety saw, and customize special saw blade, to meet the demand of rescue site.
Claims (4)
1. for an amplitude modulation safety saw for emergency relief, it is characterized in that: be made up of housing, transmission mechanism, amplitude regulating mechanism, saw blade fixture and scalable saw bow;
Described housing comprises left coverboard, right coverboard, upper coverboard, lower coverboard, front coverboard, rear coverboard and handle, upper coverboard, lower coverboard, front coverboard, rear coverboard are connected with left coverboard and right coverboard by screw, handle is screwed in rear coverboard, and left coverboard and right coverboard have the chute of accommodation and fixed amplitude conciliation axle;
Electric machine support, the gear shaft support of described transmission mechanism are fixed on left coverboard and right coverboard by screw; Motor utilizes screw to be installed on electric machine support, and the output shaft of motor installs synchronous pulley, and utilizes back-up ring A axial location, and pinion shaft is provided with synchronous pulley, and utilizes back-up ring B axial location, installs Timing Belt between synchronous pulley A and synchronous pulley B; Pinion shaft and Large Gear Shaft are installed on gear shaft support, are provided with bearing between pinion shaft and gear shaft support, and gear shaft support installing has the catch A and catch B that locate for bearing, and Large Gear Shaft end is provided with back-up ring C; Large Gear Shaft is connected with gear wheel by bearing, by screw steady pin axle bed and balancing weight on gear wheel, axis pin base is provided with cam pin, and cam pin and balancing weight opposite are installed, and cam pin are installed slide block A;
The short sliding axle of described amplitude regulating mechanism is provided with the chute coordinated with slide block A, the two ends column part of short sliding axle coordinates with the circular hole of short sliding axle support A, short sliding axle support B, short sliding axle support A and short sliding axle support B is fixed on left coverboard and right coverboard by screw, is connected in the middle part of short sliding axle by straight pin A with fork-shaped fork; The column part at long sliding axle two ends coordinates with the circular hole of long sliding axle support A and long sliding axle support B, and long sliding axle support A and long sliding axle support B is fixed on left coverboard and right coverboard by screw; Be provided with straight pin B in the middle part of long sliding axle, straight pin B install the slide block B matched with the U-lag of fork-shaped fork, tension block is installed by screw in the U-lag end of fork-shaped fork; Amplitude adjusted axle is installed in the middle part of fork-shaped fork, amplitude adjusted axle is installed the slide block C matched with the U-lag of fork-shaped fork, amplitude adjusted axle is provided with the sleeve for positioning sliding block C, sleeve 315 is outer installs briquetting and wing nut, and the squared ends of amplitude adjusted axle and briquetting coordinate with the chute of left coverboard, right coverboard respectively;
Described saw blade fixture is connected by branch sleeve one end with long sliding axle, and branch sleeve utilizes holding screw locking; Right briquetting and left briquetting are arranged in branch sleeve by straight pin, and saw blade inserts between right briquetting and left briquetting, and screw screws in the screwed hole of left briquetting through the circular hole of right briquetting and saw blade, tightens screw and gets final product clamping saw blade;
The saw bow pressing plate of described scalable saw bow is fixed on upper coverboard by screw, saw bow pressing plate is provided with lock-screw, saw bow slide bar is arranged in the groove of saw bow pressing plate, and is connected with saw bow depression bar by screw, and the lower end of saw bow depression bar is by screw and nut fixed block.
2. amplitude modulation safety saw according to claim 1, it is characterized in that: adopt fork-shaped fork, utilize lever principle, long sliding axle is passed to after straight reciprocating motion constant for short sliding axle amplitude being zoomed in or out, finally drive saw blade motion by the saw blade clamping apparatus being installed on long sliding axle one end, the amplitude achieving saw blade linear reciprocating motion is adjustable.
3. amplitude modulation safety saw according to claim 1, it is characterized in that: amplitude adjusted axle by briquetting and wing nut can be fixed on left coverboard and right coverboard open the optional position of chute, by the position of adjusting range regulating shaft, saw blade linear reciprocating motion amplitude continuously adjustabe within the scope of 1 ~ 25mm can be realized.
4. amplitude modulation safety saw according to claim 1, it is characterized in that: have employed scalable saw bow, saw bow slide bar can slide in the groove of saw bow pressing plate, and be fixed on desired location by lock-screw, the pulley utilizing saw bow depression bar lower end to install plays good guiding and supporting role to saw blade, to adapt to the needs of different rescue occasion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310728546.4A CN104722839B (en) | 2013-12-20 | 2013-12-20 | Amplitude modulation safety saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310728546.4A CN104722839B (en) | 2013-12-20 | 2013-12-20 | Amplitude modulation safety saw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104722839A true CN104722839A (en) | 2015-06-24 |
| CN104722839B CN104722839B (en) | 2017-03-29 |
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ID=53447581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310728546.4A Expired - Fee Related CN104722839B (en) | 2013-12-20 | 2013-12-20 | Amplitude modulation safety saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104722839B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497528A (en) * | 2020-11-27 | 2021-03-16 | 山东天智信息科技有限公司 | Arc-shaped cutting machine for road pavement marble slabs |
| CN113478002A (en) * | 2021-07-13 | 2021-10-08 | 章双凤 | Cutting equipment capable of realizing fixed-length cutting of workpiece |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2749875C2 (en) * | 1977-11-08 | 1986-07-10 | Storz, Karl, 7200 Tuttlingen | Surgical jigsaw |
| EP1232817A2 (en) * | 2001-02-16 | 2002-08-21 | Makita Corporation | Reciprocating power tools |
| CN1532016A (en) * | 2002-12-23 | 2004-09-29 | �ܶ��ֻ��綯���߹�˾ | Driving mechanism and power tool |
| CN102615348A (en) * | 2012-04-11 | 2012-08-01 | 宁波黑松工具有限公司 | Reciprocating saw |
| CN202824851U (en) * | 2012-09-05 | 2013-03-27 | 宁波黑松工具有限公司 | Electric reciprocating saw |
-
2013
- 2013-12-20 CN CN201310728546.4A patent/CN104722839B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2749875C2 (en) * | 1977-11-08 | 1986-07-10 | Storz, Karl, 7200 Tuttlingen | Surgical jigsaw |
| EP1232817A2 (en) * | 2001-02-16 | 2002-08-21 | Makita Corporation | Reciprocating power tools |
| CN1532016A (en) * | 2002-12-23 | 2004-09-29 | �ܶ��ֻ��綯���߹�˾ | Driving mechanism and power tool |
| CN102615348A (en) * | 2012-04-11 | 2012-08-01 | 宁波黑松工具有限公司 | Reciprocating saw |
| CN202824851U (en) * | 2012-09-05 | 2013-03-27 | 宁波黑松工具有限公司 | Electric reciprocating saw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497528A (en) * | 2020-11-27 | 2021-03-16 | 山东天智信息科技有限公司 | Arc-shaped cutting machine for road pavement marble slabs |
| CN113478002A (en) * | 2021-07-13 | 2021-10-08 | 章双凤 | Cutting equipment capable of realizing fixed-length cutting of workpiece |
| CN113478002B (en) * | 2021-07-13 | 2022-09-06 | 深圳市宏展科技有限公司 | Cutting equipment capable of realizing fixed-length cutting of workpiece |
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| Publication number | Publication date |
|---|---|
| CN104722839B (en) | 2017-03-29 |
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Granted publication date: 20170329 Termination date: 20211220 |