CN204004226U - Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher - Google Patents
Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher Download PDFInfo
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- CN204004226U CN204004226U CN201420413379.4U CN201420413379U CN204004226U CN 204004226 U CN204004226 U CN 204004226U CN 201420413379 U CN201420413379 U CN 201420413379U CN 204004226 U CN204004226 U CN 204004226U
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Abstract
Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher, wherein, power is carried advance and retreat gear deceleration part by power input part, advance and retreat gears deceleration part through intermediate power transmitting portions by transmission of power to differential planetary transmission electrodeless variable-speed part, by differential planetary transmission electrodeless variable-speed part, power is exported respectively and driven transition gearing down part again, finally pass to left track drive part and right side track drive part, advance and retreat gear control section is for the gear switch of the gear deceleration part of advancing and retreat; In differential planetary transmission electrodeless variable-speed part, be provided with two self-locking type hydraulic motors, directly drive to realize machinery, hydraulic pressure stepless time adjustment and turn to control; In the time that two self-locking type hydraulic operation status of motors are identical, endless-track vehicle is realized machinery and is directly driven with hydraulic pressure stepless time adjustment and drive, in the time that two self-locking type hydraulic operation status of motors are different, there is speed discrepancy in left and right side crawler belt output wheel, realizing hydraulic control turns to, and by endless-track vehicle transmission with turn to integrated, easy and simple to handle, be easy to drive.
Description
Technical field
The utility model relates to farm machinery transmission technology field, relates in particular to a kind of machinery and directly drives hydraulic pressure double controlled endless-track vehicle buncher.
Background technique
System of Tracked Vehicle Transmission System comprises clutch, the large main structure of speed changer two conventionally, and wheeled vehicle transmission system mainly comprises the five large main structures such as clutch, speed changer, Universal drive, main reducing gear and differential mechanism.Due to endless-track vehicle and wheeled vehicle structure difference large, working principle also has very large difference, and the transmission system of endless-track vehicle has the function of wheeled vehicle steering system conventionally; Endless-track vehicle is mainly taking cat as main at present, conventionally adopt Purely mechanical power transmission system transferring power with cat, it has simple in structure, efficiency advantages of higher, but Purely mechanical power-transmitting unit, gear shift operation complexity, drive a car or the technical ability of tractor because agricultural machinery operator does not possess conventionally simultaneously, the cooperation of clutch, throttle, gearshift is difficult to control, and then has limited the development of tractor.At present, much crawler tractor manufacturer adopts oil hydraulic pump-motor integrated system to realize the electrodeless drive system of crawler tractor, because the crawler tractor driving operation that adopts electrodeless drive system is improved, agricultural machinery operator need not participate in professional technical training, only need simple exercise can grasp driving efficiency, thereby accepted by users, and obtained extraordinary effect, but add after hydraulic system, improved complexity and the manufacture cost of operation system.In daily production and application process, cat will articulate agricultural machinery and implement conventionally, and agricultural machinery and implement are in the time of farm work, motor is generally in large throttle state, close to constant engine operating mode, the speed of a motor vehicle changes little, power and the moment of torsion of machinery are all larger, and then have increased the consumption of cat energy.
Simultaneously, cat vehicle in the market adopts the scheme that turns to of steering linkages operation jaw clutch and multi-disc brake conventionally, its implementation procedure is: when cat vehicle turn left to time, driver's operation left steering pull bar separates and the braking of left side output shaft left side jaw clutch, because crawler tractor vehicle left side transfer motion power interrupts and brakes and stop the rotation, now, under the driving of tractor right side power, facility are realized and being turned to the left; In like manner can realize right hand steering, but this steering equipment adopts separation and in conjunction with jaw clutch and break realization, it turns to precision low, steering manipulation is poor.
Model utility content
The technical problem that the utility model solves is to provide a kind of machinery directly to drive hydraulic pressure double controlled endless-track vehicle buncher, to solve the shortcoming in above-mentioned background technology.
The technical problem that the utility model solves realizes by the following technical solutions:
Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher, comprises power input part, casing, advance and retreat gear deceleration part, advance and retreat gear control section, intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part, transition gearing down part, left track drive part and right side track drive part, wherein, power input part, advance and retreat gear deceleration part, advance and retreat gear control section, intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part, transition gearing down part, left track drive part and right side track drive part are installed on casing, casing is arranged on engine power outgoing position place, power is connected with advance and retreat gear deceleration part through power input, advance and retreat gear deceleration part is connected with differential planetary transmission electrodeless variable-speed part by intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part is connected with transition gearing down part, transition gearing down part is connected with left track drive part and right side track drive part respectively, advance and retreat gear control section is connected with advance and retreat gear deceleration part, power is delivered to advance and retreat gear deceleration part through power input part, advance and retreat gears deceleration part through intermediate power transmitting portions by transmission of power to differential planetary transmission electrodeless variable-speed part, output power and drive transition gearing down part by differential planetary transmission electrodeless variable-speed part again, finally pass to left track drive part and right side track drive part, advance and retreat gear control section is for the gear switch of the gear deceleration part of advancing and retreat.
The concrete linkage structure of each part mentioned above is as follows:
In power input part, power input shaft one end is installed on casing by end cap one is fastening, and the other end is provided with drive bevel gear, and power input shaft drives drive bevel gear rotation transferring power by spline;
In advance and retreat gear deceleration part, bevel gear back shaft two ends are arranged in casing by bearing, left side driven wheel of differential and right side driven wheel of differential empty set are slip idling conditions on bevel gear back shaft, splined hub is between left side driven wheel of differential and right side driven wheel of differential and be set on the spline of bevel gear back shaft, combined cover is set in splined hub, drive bevel gear engages with the bevel gear of left side driven wheel of differential and right side driven wheel of differential simultaneously, power input shaft by drive bevel gear by transmission of power to left side driven wheel of differential and right side driven wheel of differential, right side thrust metal is integrated on bevel gear back shaft, left side thrust metal is positioned at a side of left side driven wheel of differential by snap ring one,
In advance and retreat gear control section, sleeve interference is set in casing, spring seat is arranged on sleeve pipe one side, and gearshift spring and gearshift steel ball are installed in spring seat, shift shaft one end is arranged in sleeve pipe, and the other end is provided with the gearshift keyway for external control bar is installed, and selector fork is sleeved on shift shaft, during Intercalation overlaps simultaneously, and there are neutral gear lock ring, forward gears lock ring and the lock ring that reverses gear in the shift shaft outer installment of inserting sleeve end;
In intermediate power transmitting portions, jack shaft two ends are installed in casing by bearing, and counter shaft driven gear is set on jack shaft, and counter shaft driven gear engages with the outer gear of combined cover, give follow-up relevant apparatus for the transmission of power in connection with cover;
Differential planetary transmission electrodeless variable-speed part comprises four sliding bearings, it is respectively sliding bearing three, sliding bearing four, sliding bearing five and sliding bearing six, on differential main shaft, be provided with left differential planetary drive part and right differential planetary drive part that structure is identical, and these two planetary reduction gear control sections are about differential driving gear symmetry, differential driving gear is set in differential main shaft, sliding bearing three and sliding bearing five are equipped with in its both sides respectively spacer shell, left gear formula gear ring is sleeved on sliding bearing three and slides and dally, right gear formula gear ring is sleeved on sliding bearing five and slides and dally, left sun gear and right sun gear are set on the spline of differential main shaft outer installment, and sliding bearing four and sliding bearing six respectively spacer shell be loaded on differential main shaft, left gear formula planet carrier is set on sliding bearing four and slides and dally, right gear formula planet carrier is set on sliding bearing six and slides and dally, left lateral star-wheel sliding bearing interference is in left planetary pinion, left planetary pinion is arranged between left gear formula gear ring and left sun gear, and be set on left lateral star-wheel line shaft and slide and rotate by left lateral star-wheel sliding bearing, right lateral star-wheel sliding bearing interference is in right planetary pinion, right planetary pinion is arranged between right gear formula gear ring and right sun gear, and be set on right lateral star-wheel line shaft and slide and rotate by right lateral star-wheel sliding bearing, one end interference of left lateral star-wheel line shaft is installed in left gear formula planet carrier, and the other end interference has left lateral star-wheel back-up ring, and one end interference of right lateral star-wheel line shaft is installed in right gear formula planet carrier, and the other end interference has right lateral star-wheel back-up ring, left planetary pinion is circumferentially uniform along left gear formula planet carrier, engage with the internal gear of left gear formula gear ring, the external gear of left sun gear simultaneously, right planetary pinion is circumferentially uniform along right gear formula planet carrier, engages with the internal gear of right gear formula gear ring, the external gear of right sun gear simultaneously, in addition, on left gear formula gear ring, be provided with oil duct one, on left gear formula planet carrier, be provided with oil duct two, on right gear formula gear ring, be provided with oil duct three, on right gear formula planet carrier, be provided with oil duct four, be respectively used to lubricant oil and enter corresponding sliding bearing, lubricate ensureing, differential main shaft two ends are arranged in casing, symmetrical fastening being installed on casing of left oil hydraulic motor and right oil hydraulic motor, left hydraulic motor gear is set on the spline spindle of left oil hydraulic motor, spline spindle one end of left oil hydraulic motor is spacing by snap ring seven, left oil hydraulic motor drives left hydraulic motor gear rotation by spline spindle, and left hydraulic motor gear engages with the outer gear of left gear formula gear ring, right hydraulic motor gear is set on the spline spindle of right oil hydraulic motor, spline spindle one end of right oil hydraulic motor is spacing by snap ring nine, right oil hydraulic motor drives right hydraulic motor gear rotation by spline spindle, and right hydraulic motor gear engages with the outer gear of right gear formula gear ring,
Transition gearing down part comprises two sliding bearings, respectively sliding bearing seven and sliding bearing eight, on transition transmission shaft, be provided with left transition gearing down part and right transition gearing down part that structure is identical, and these two transition gearing down parts are about middle back-up ring symmetry, and transition transmission shaft two ends are arranged in casing, middle back-up ring both sides are respectively arranged with sliding bearing seven and sliding bearing eight, sliding bearing seven is installed on transition transmission shaft with sliding bearing eight transition simultaneously, left duplicate gear is set on transition transmission shaft and is dallied by sliding bearing seven, right duplicate gear is set on transition transmission shaft and is dallied by sliding bearing eight, in addition, the right side gear of left duplicate gear engages with left planetary outer gear, left planetary power passes to follow-up relevant apparatus by the left side gear of left duplicate gear, the left side gear of right duplicate gear engages with right planetary outer gear, and right planetary power passes to follow-up relevant apparatus by the right side gear of right duplicate gear,
Left track drive part comprises a bearing, an end cap and a back-up ring, respectively bearing ten, end cap ten and back-up ring eight, end cap ten is installed on casing, left driving shaft is installed in end cap ten by bearing ten, outside framework oil seal one is installed in end cap ten, and be set on left driving shaft, for the dynamic rotary sealing of left actuation gear, left actuation gear is installed on left driving shaft, and drive left driving shaft rotation by spline, to drive the outside wheel that travels, back-up ring eight is set on left driving shaft, for adjusting axial clearance;
Right side track drive part comprises a bearing, an end cap and a back-up ring, respectively bearing 11, end cap 11 and back-up ring nine, end cap 11 is installed on casing, right driving axle is installed in end cap 11 by bearing 11, outside framework oil seal two is installed in end cap 11, and be set on right driving axle, for the dynamic rotary sealing of right actuation gear, right actuation gear is installed on right driving axle, and drive right driving axle rotation by spline, to drive the outside wheel that travels, back-up ring nine is set on right driving axle, for adjusting axial clearance; And left driving shaft docks with right driving axle.
In the utility model, on casing, be also provided with box sealing lid one, box sealing lid two and oilhole plug screw, for realizing the sealing to casing.
In the utility model, the oil sealing one for the sealing of power input shaft dynamic rotary is installed in end cap one.
In the utility model, between splined hub and left side driven wheel of differential, be provided with back-up ring one, between splined hub and right side driven wheel of differential, be provided with back-up ring two, back-up ring one and back-up ring two are all for splined hub axially locating on bevel gear back shaft.
In the utility model, the side that left side driven wheel of differential is set in bevel gear back shaft is provided with needle bearing one, axial thrust load while being used for accepting left side driven wheel of differential dynamic rotary transferring power, the side that right side driven wheel of differential is set in bevel gear back shaft is provided with needle bearing two, the axial thrust load when accepting right side driven wheel of differential dynamic rotary transferring power.
In the utility model, left side driven wheel of differential is set in and on bevel gear back shaft, is slip idling conditions by left sliding bearing, and right side driven wheel of differential is set in and on bevel gear back shaft, is slip idling conditions by right sliding bearing.
In the utility model, on declutch shift shaft, be provided with for selector fork is carried out to spacing snap ring four.
In the utility model, needle bearing three is installed in right driving axle one end, left driving shaft docks with right driving axle by needle bearing three.
In the utility model, in the time that outside operating handle promotes shifting shaft, gearshift steel ball correspondence under the effect of gearshift spring falls in neutral gear lock ring, forward gears lock ring or reverse gear lock stop ring, in the time that gearshift steel ball correspondence falls into neutral gear lock ring, be set in combined cover in the splined hub center position in splined hub, now left side driven wheel of differential and right side driven wheel of differential are all in idling conditions, and vehicle stop travels; In the time that external control bar drives shift shaft left lateral, the selector fork being installed on shift shaft moves to left thereupon and drives combined cover to slide left, now left side driven wheel of differential passes to splined hub by power by combined cover, and splined hub band dynamic bevel gear back shaft is rotated in the forward, and vehicle advances and travels; In like manner, in the time that external control bar drives combined cover to move to right, right side driven wheel of differential passes to splined hub by power by combined cover, the counterrotating of splined hub band dynamic bevel gear back shaft, and vehicle falls back and travels.In use, operator only needs to handle external control bar and promotes shift shaft and can realize the change of gear, simple and convenient.
In the utility model, when the self-locking during without external hydraulic motivational drive of left oil hydraulic motor, the left hydraulic motor gear being installed on its spline spindle locks thereupon, now left gear formula gear ring is also in the lock state, differential driving gear drives the rotation of differential main shaft by spline, differential main shaft drives left sun gear rotation by spline, and drive is along the uniform left planetary pinion rotation of left gear formula planet carrier, thereby drive the rotation of left gear formula planet carrier, left gear formula planet carrier is given follow-up relevant apparatus by outer gear by transmission of power, directly drives to realize mechanical type; When the left oil hydraulic motor of external hydraulic positive direction actuation drives left hydraulic motor gear rotation, and then drive left gear formula gear ring to be rotated in the forward, accelerate the rotating speed of left gear formula planet carrier, otherwise reduce the rotating speed of left gear formula planet carrier, realize the electrodeless variable-speed to left oil hydraulic motor by the control to outside Hydrauservo System, and then realize the electrodeless variable-speed output to left gear formula planet carrier; Drive control left gear formula gear ring to realize acceleration or deceleration by left hydraulic motor gear; The mode that right fluid motor-driven control right gear formula gear ring is realized acceleration or deceleration is consistent with left oil hydraulic motor; In the time that left oil hydraulic motor is identical with right oil hydraulic motor working state, endless-track vehicle is realized machinery and is directly driven with hydraulic pressure stepless time adjustment and drive, in the time that left oil hydraulic motor is different from right oil hydraulic motor working state, between left track output wheel and right side crawler belt output wheel, produce speed poor, turn to thereby realize hydraulic control.
Beneficial effect: the utility model adopts that the planet carrier of two self-locking type hydraulic motor control planetary gear mechanisms directly drives to realize machinery, hydraulic pressure stepless time adjustment and turn to control; In the time that two self-locking type hydraulic operation status of motors are identical, endless-track vehicle is realized machinery and is directly driven with hydraulic pressure stepless time adjustment and drive, in the time that two self-locking type hydraulic operation status of motors are different, it is poor that left and right side crawler belt output wheel produces speed, turns to realize hydraulic control, efficiently solve the combination problem that mechanical type directly drives transmission and hydraulic pressure electrodeless variable-speed, and by endless-track vehicle transmission with turn to integratedly, turn to precision high, and steering manipulation is strong, easy and simple to handle, be easy to drive.
Brief description of the drawings
Fig. 1 is the structural representation of preferred embodiment of the present utility model.
Fig. 2 is A-A place sectional view in Fig. 1.
Fig. 3 is preferred embodiment medium power of the present utility model input part structural representation.
Fig. 4 is advance and retreat gear deceleration part structural representation in preferred embodiment of the present utility model.
Fig. 5 is advance and retreat gear control section and advance and retreat gear deceleration part structural representation in preferred embodiment of the present utility model.
Fig. 6 is intermediate power transmitting portions structural representation in preferred embodiment of the present utility model.
Fig. 7 is differential planetary transmission electrodeless variable-speed part-structure schematic diagram in preferred embodiment of the present utility model.
Fig. 8 is left differential planetary drive part structural representation in preferred embodiment of the present utility model.
Fig. 9 is right differential planetary drive part structural representation in preferred embodiment of the present utility model.
Figure 10 is transition gearing down part-structure schematic diagram in preferred embodiment of the present utility model.
Figure 11 is left track drive part and right side track drive part-structure schematic diagram in preferred embodiment of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Directly drive hydraulic pressure double controlled endless-track vehicle buncher referring to the machinery of Fig. 1～Fig. 2, comprise power input part X, casing W, box sealing lid one A, box sealing lid two B, oilhole plug screw C, advance and retreat gear deceleration part L, advance and retreat gear control section R, intermediate power transmitting portions M, differential planetary transmission electrodeless variable-speed part T, transition gearing down part S, left track drive part N1 and right side track drive part N2, wherein, power input part X, box sealing lid one A, box sealing lid two B, oilhole plug screw C, advance and retreat gear deceleration part L, advance and retreat gear control section R, intermediate power transmitting portions M, differential planetary transmission electrodeless variable-speed part T, transition gearing down part S, left track drive part N1 and right side track drive part N2 are installed on casing W, casing W is arranged on engine power outgoing position place, power is inputted through power input part X, flow to advance and retreat gear deceleration part L, advance and retreat gears deceleration part L through intermediate power transmitting portions M by transmission of power to differential planetary transmission electrodeless variable-speed part T, output power and drive transition gearing down part S by differential planetary transmission electrodeless variable-speed part T again, finally pass to left track drive part N1 and right side track drive part N2 by transition gearing down part S, differential planetary transmission electrodeless variable-speed part T comprises left differential planetary drive part T1 and right differential planetary drive part T2, advance and retreat gear control section R is for the forward gear of the gear deceleration part L that advances and retreat, reverse gear and the switching of neutral.
Shown in Figure 3, power input part X comprises power input shaft X1, end cap one X2, oil sealing one X3, drive bevel gear X4, bearing one X5, clamping bolt one X6; Wherein, power input shaft X1 one end is installed in end cap one X2 by bearing one X5, end cap one X2 is anchored on casing W through clamping bolt one X6, oil sealing one X3 is installed in end cap one X3, for the dynamic rotary sealing of power input shaft X1, the power input shaft X1 the other end is provided with drive bevel gear X4, and power input shaft X1 drives drive bevel gear X4 rotation transferring power by spline.
Shown in Fig. 4～Fig. 5, advance and retreat gear deceleration part L comprises clamping bolt two L1-1, end cap two L1-2, bearing two L1-3, left side driven wheel of differential L1-4, needle bearing one L1-5, left side thrust metal L1-6, snap ring one L1-7, left sliding bearing L1-8, back-up ring one L1-9; Clamping bolt three L2-1, end cap three L2-2, bearing three L2-3, right side driven wheel of differential L2-4, needle bearing two L2-5, right side thrust metal L2-6, snap ring two L2-7, right sliding bearing L2-8, back-up ring two L2-9, splined hub L3, combined cover L4, bevel gear back shaft L5, right side thrust metal L6; Advance and retreat gear control section R comprises neutral gear lock ring R1, sleeve pipe R2, forward gears lock ring R3, gearshift spring R4, gearshift steel ball R5, reverse gear lock stop ring R6, shifting shaft R7, selector fork R8, snap ring four R9, seal ring R10, gearshift keyway R11, spring seat R12.
Splined hub L3 is between left side driven wheel of differential L1-4 and right side driven wheel of differential L2-4 and be set on the spline of bevel gear back shaft L5, drive bevel gear X4 engages with the bevel gear of left side driven wheel of differential L1-4 and right side driven wheel of differential L2-4 simultaneously, power input shaft X1 by drive bevel gear X12 by transmission of power to left side driven wheel of differential L1-4 and right side driven wheel of differential L2-4, left side driven wheel of differential L1-4 is by left sliding bearing L1-8, right side driven wheel of differential L2-4 is set with on bevel gear back shaft L5 and is slip idling conditions by right sliding bearing L2-8, between splined hub L3 and left side driven wheel of differential L1-4, be provided with back-up ring one L1-9, between splined hub L3 and right side driven wheel of differential L2-4, be provided with back-up ring two L2-9, for splined hub L3 axially locating on bevel gear back shaft L5, the side that left side driven wheel of differential L1-4 is set in bevel gear back shaft L5 is provided with needle bearing one L1-5, axial thrust load while being used for accepting left side driven wheel of differential L1-4 dynamic rotary transferring power, equally, the side that L2-4 is set in bevel gear back shaft L5 is provided with needle bearing two L2-5, axial thrust load while being used for accepting right side driven wheel of differential L2-4 dynamic rotary transferring power, right side thrust metal L6 is integrated on bevel gear back shaft L5, left side thrust metal L1-6 is positioned at a side of left side driven wheel of differential L1-4 by snap ring one L1-7, bevel gear back shaft L5 one end is installed in end cap two L1-2 by bearing two L1-3, the other end is installed in end cap three L2-2 by bearing three L2-3, it is upper that end cap two L1-2 are installed on casing W by clamping bolt two L1-1, and end cap three L2-2 are installed on casing W by clamping bolt three L2-1.
Sleeve pipe R2 interference is in casing W, shifting shaft R7 one end is loaded in sleeve pipe R2, seal ring R10 is installed in casing W, to shifting shaft, R7 plays seal action, the shifting shaft R7 the other end is provided with gearshift keyway R11, for the installation of external control bar, and be provided with spring seat R12 in sleeve pipe R2 mono-side, gearshift spring R4, gearshift steel ball R5 is arranged in spring seat R12, selector fork R8 is set on shifting shaft R7, and spacing by being installed on snap ring four R9 on shifting shaft R7, simultaneously in the external slot of selector fork R8 Intercalation cover R3, and there is neutral gear lock ring R1 in the shifting shaft R7 outer installment of inserting sleeve pipe R2 end, forward gears lock ring R3 and reverse gear lock stop ring R6.
In the time that outside operating handle promotes shifting shaft R7, gearshift steel ball R5 correspondence under the effect of gearshift spring R4 falls in neutral gear lock ring R1, forward gears lock ring R3 and reverse gear lock stop ring R6, in the time that gearshift steel ball R5 correspondence falls into neutral gear lock ring R1, be set in combined cover L4 on the splined hub L3 center position in splined hub L3, now left side driven wheel of differential L1-4 and right side driven wheel of differential L2-4 are all in idling conditions, and vehicle stop travels; In the time that external control bar drives shift shaft R7 left lateral, the selector fork R8 being installed on shift shaft R7 moves to left thereupon and drives combined cover L4 to slide left, now left side driven wheel of differential L1-4 passes to splined hub L3 by power by combined cover L4, splined hub L3 band dynamic bevel gear back shaft L5 is rotated in the forward, and vehicle advances and travels; In like manner, in the time that external control bar drives combined cover R3 to move to right, right side driven wheel of differential L2-4 passes to splined hub L3 by power by combined cover L4, splined hub L3 band dynamic bevel gear back shaft L5 counterrotating, and vehicle falls back and travels.
Shown in Figure 6, intermediate power transmitting portions M comprises bearing four M1, end cap four M2, clamping bolt four M3, bearing five M4, end cap five M5, clamping bolt five M6, jack shaft M7, snap ring five M8, counter shaft driven gear M9; Wherein, jack shaft M7 one end is installed in end cap five M5 by bearing five M4, and the other end is installed in end cap four M2 by bearing four M1, and it is upper that end cap five M5 are installed on casing W by clamping bolt five M6, and end cap four M2 are installed on casing W by clamping bolt four M3; It is upper that counter shaft driven gear M9 is set in jack shaft M7, and counter shaft driven gear M9 is spacing by snap ring five M8, and counter shaft driven gear M9 engages with the outer gear of combined cover L4, gives follow-up relevant apparatus in connection with the transmission of power of cover L4.
Shown in Fig. 7～Fig. 9, differential planetary drive stepless speed changing part T comprises left differential planetary drive part T1, right differential planetary drive part T2, differential driving gear T3 and differential main shaft T4, wherein, left differential planetary drive part T1 comprises left gear formula gear ring T1-1, left lateral star-wheel back-up ring T1-2, left lateral star-wheel line shaft T1-3, oil duct one T1-4, sliding bearing three T1-5, back-up ring three T1-6, left sun gear T1-7, snap ring six T1-8, back-up ring four T1-9, left gear formula planet carrier T1-10, oil duct two T1-11, left lateral star-wheel sliding bearing T1-12, left planetary pinion T1-13, snap ring seven T1-14, left hydraulic motor gear T1-15, fastening screw trip bolt one T1-16, left oil hydraulic motor T1-17, clamping bolt six T1-18, bearing six T1-19, end cap six T1-20, sliding bearing four T1-21, right differential planetary drive part T2 comprises right gear formula gear ring T2-1, right lateral star-wheel back-up ring T2-2, right lateral star-wheel line shaft T2-3, oil duct three T2-4, sliding bearing five T2-5, back-up ring four T2-6, right sun gear T2-7, snap ring eight T2-8, back-up ring five T2-9, right gear formula planet carrier T2-10, oil duct four T2-11, right lateral star-wheel sliding bearing T2-12, right planetary pinion T2-13, snap ring nine T2-14, right hydraulic motor gear T2-15, fastening screw trip bolt two T2-16, right oil hydraulic motor T2-17, clamping bolt seven T2-18, bearing seven T2-19, end cap seven T2-20, sliding bearing six T2-21.
Left differential planetary drive part T1 and right differential planetary drive part T2 are symmetrical arranged about differential driving gear T3, and it is upper that differential driving gear T3 is set in differential main shaft T4, and carry out axial limiting by snap ring six T1-8 and snap ring eight T2-8 that are installed on differential main shaft T4.
In left differential planetary drive part T1, sliding bearing three T1-5 spacer shells are loaded on differential main shaft T4, the spline that left sun gear T1-7 is set in differential main shaft T4 outer installment is uploaded the power of successive difference speed main shaft T4, left gear formula gear ring T1-1 is set in the upper idle running of sliding of sliding bearing three T1-5, sliding bearing four T1-21 spacer shells are loaded on differential main shaft T4, left gear formula planet carrier T1-10 is set in the upper idle running of sliding of sliding bearing four T1-21, left lateral star-wheel line shaft T1-3 one end interference is installed in left gear formula planet carrier T1-10, left lateral star-wheel sliding bearing T1-12 interference is in left planetary pinion T1-13, left planetary pinion T1-13 is set in the upper rotation of sliding of left lateral star-wheel line shaft T1-3 by left lateral star-wheel sliding bearing T1-12, left lateral star-wheel line shaft T1-3 the other end interference has left lateral star-wheel back-up ring T1-2, to limit the axial float of left planetary pinion T1-13, and left planetary pinion T1-13 is circumferentially uniform along left gear formula planet carrier T1-10, uniform left planetary pinion T1-13 is installed between left gear formula gear ring T1-1 and left sun gear T1-7, engage with the internal gear of left gear formula gear ring T1-1 and the external gear of left sun gear T1-7 simultaneously, be installed on back-up ring three T1-6 between sliding bearing three T1-5 and left sun gear T1-7, be installed on the axial clearance that back-up ring four T1-9 between snap ring six T1-8 and sliding bearing four T1-21 are respectively used to adjust left differential planetary drive part T1, on left gear formula gear ring T1-1, be provided with oil duct one T1-4, on left gear formula planet carrier T1-10, be provided with oil duct two T1-11, be respectively used to lubricant oil and enter corresponding sliding bearing, ensure lubricated, bearing six T1-19 are set on differential main shaft T4, and be installed on by clamping bolt six T1-18 and be fastened in end cap six T1-20 on casing W, left oil hydraulic motor T1-17 is installed on casing W by fastening screw trip bolt one T1-16 is fastening, left hydraulic motor gear T1-15 is set on the spline spindle of left oil hydraulic motor T1-17, and spline spindle one end of left oil hydraulic motor T1-17 is spacing by snap ring seven T1-14, left oil hydraulic motor T1-17 drives left hydraulic motor gear T1-15 rotation by spline spindle, left hydraulic motor gear T1-15 engages with the outer gear of left gear formula gear ring T1-1.
When left oil hydraulic motor T1-17 self-locking during without external hydraulic motivational drive, the left hydraulic motor gear T1-15 being installed on its spline spindle locks thereupon, now left gear formula gear ring T1-1 is also in the lock state, differential driving gear T3 drives differential main shaft T4 rotation by spline, differential main shaft T4 drives left sun gear T1-7 rotation by spline, and drive is along the uniform left planetary pinion T1-13 rotation of left gear formula planet carrier T1-10, thereby drive left gear formula planet carrier T1-10 rotation, left gear formula planet carrier T1-10 gives follow-up relevant apparatus by outer gear by transmission of power, realizing mechanical type directly drives, when the left oil hydraulic motor T1-17 of external hydraulic positive direction actuation drives left hydraulic motor gear T1-15 rotation, and then drive left gear formula gear ring T1-1 to be rotated in the forward, can accelerate the rotating speed of left gear formula planet carrier T1-10, otherwise can reduce the rotating speed of left gear formula planet carrier T1-10, by realizing the electrodeless variable-speed to left oil hydraulic motor T1-17 to the control of outside Hydrauservo System, and then realize the electrodeless variable-speed output to left gear formula planet carrier T1-10, drive control left gear formula gear ring T1-1 to realize acceleration or deceleration by left hydraulic motor gear T1-15.
In right differential planetary drive part T2, sliding bearing five T2-5 spacer shells are loaded on differential main shaft T4, the spline that right sun gear T2-7 is set in differential main shaft T4 outer installment is uploaded the power of successive difference speed main shaft T4, right gear formula gear ring T2-1 is set in the upper idle running of sliding of sliding bearing five T2-5, sliding bearing six T2-21 spacer shells are loaded on differential main shaft T4, right gear formula planet carrier T2-10 is set in the upper idle running of sliding of sliding bearing six T2-21, right lateral star-wheel line shaft T2-3 one end interference is installed in right gear formula planet carrier T2-10, right lateral star-wheel sliding bearing T2-12 interference is in right planetary pinion T2-13, right planetary pinion T2-13 is set in the upper rotation of sliding of right lateral star-wheel line shaft T2-3 by right lateral star-wheel sliding bearing T2-12, right lateral star-wheel line shaft T2-3 the other end interference has right lateral star-wheel back-up ring T2-2, to limit the axial float of right planetary pinion T2-13, and right planetary pinion T2-13 is circumferentially uniform along right gear formula planet carrier T2-10, uniform right planetary pinion T2-13 is installed between right gear formula gear ring T2-1 and right sun gear T2-7, engage with the internal gear of right gear formula gear ring T2-1 and the external gear of right sun gear T2-7 simultaneously, be installed on back-up ring four T2-6 between sliding bearing five T2-5 and right sun gear T2-7, be installed on the axial clearance that back-up ring five T2-9 between snap ring eight T2-8 and sliding bearing six T2-21 are respectively used to adjust right differential planetary drive part T2, on right gear formula gear ring T2-1, be provided with oil duct three T2-4, on right gear formula planet carrier T2-10, be provided with oil duct four T2-11, be respectively used to lubricant oil and enter corresponding sliding bearing, ensure lubricated, bearing seven T2-19 are set on differential main shaft T4, and be installed on by clamping bolt seven T2-18 and be fastened in end cap seven T2-20 on casing W, right oil hydraulic motor T2-17 is installed on casing W by fastening screw trip bolt two T2-16 are fastening, right hydraulic motor gear T2-15 is set on the spline spindle of right oil hydraulic motor T2-17, spline spindle one end of right oil hydraulic motor T2-17 is spacing by snap ring nine T2-14, right oil hydraulic motor T2-17 drives right hydraulic motor gear T2-15 rotation by spline spindle, right hydraulic motor gear T2-15 engages with the outer gear of right gear formula gear ring T2-1.
When right oil hydraulic motor T2-17 self-locking during without external hydraulic motivational drive, the right hydraulic motor gear T2-15 being installed on its spline spindle locks thereupon, now right gear formula gear ring T2-1 is also in the lock state, differential driving gear T3 drives differential main shaft T4 rotation by spline, differential main shaft T4 drives right sun gear T2-7 rotation by spline, and drive is along the uniform right planetary pinion T2-13 rotation of right gear formula planet carrier T2-10, thereby drive right gear formula planet carrier T2-10 rotation, right gear formula planet carrier T2-10 gives follow-up relevant apparatus by outer gear by transmission of power, realizing mechanical type directly drives, when the right oil hydraulic motor T2-17 of external hydraulic positive direction actuation drives right hydraulic motor gear T2-15 rotation, and then drive right gear formula gear ring T2-1 to be rotated in the forward, can accelerate the rotating speed of right gear formula planet carrier T2-10, otherwise can reduce the rotating speed of right gear formula planet carrier T2-10, by realizing the electrodeless variable-speed to right oil hydraulic motor T2-17 to the control of outside Hydrauservo System, and then realize the electrodeless variable-speed output to right gear formula planet carrier T2-10, drive control right gear formula gear ring T2-1 to realize acceleration or deceleration by right hydraulic motor gear T2-15.
In the time that left oil hydraulic motor T1-17 is identical with right oil hydraulic motor T2-17 working state, endless-track vehicle is realized machinery and is directly driven with hydraulic pressure stepless time adjustment and drive, in the time that left oil hydraulic motor T1-17 is different from right oil hydraulic motor T2-17 working state, between left track output wheel and right side crawler belt output wheel, produce speed poor, thereby realizing hydraulic control turns to, turn to precision high, and steering manipulation is strong.
Shown in Figure 10, transition gearing down part S comprises left transition gearing down part S1, right transition gearing down part S2, middle back-up ring S3 and transition transmission shaft S4, wherein, left transition gearing down part S1 comprises end cap eight S1-1, bearing eight S1-2, clamping bolt eight S1-3, left duplicate gear S1-4, back-up ring six S1-5, sliding bearing seven S1-6; Right transition gearing down part S2 comprises end cap nine S2-1, bearing nine S2-2, clamping bolt nine S2-3, right duplicate gear S2-4, back-up ring seven S2-5, sliding bearing eight S2-6.
Left transition gearing down part S1 and right transition gearing down part S2 are symmetrical set about middle back-up ring S3, transition transmission shaft S4 one end is installed in end cap eight S1-1 by bearing eight S1-2, the other end is installed in end cap nine S2-1 by bearing nine S2-2, it is upper that end cap eight S1-1 are installed on casing W by clamping bolt eight S1-3, and end cap nine S2-1 are installed on casing W by clamping bolt nine S2-3, sliding bearing seven S1-6 and sliding bearing eight S2-6 respectively transition are installed on transition transmission shaft S4, left duplicate gear S1-4 is set in the upper idle running of transition transmission shaft S4 by sliding bearing seven S1-6, right duplicate gear S2-4 is set in the upper idle running of transition transmission shaft S4 by sliding bearing eight S2-6, centre separates by the middle back-up ring S3 being set on transition transmission shaft S4, back-up ring six S1-5 are passed through respectively at two ends and back-up ring seven S2-5 are spacing and adjust axial clearance, the right side gear of left duplicate gear S1-4 engages with the outer gear of left planetary pinion T1-13, and the power of left planetary pinion T1-13 is passed to follow-up relevant apparatus by the left side gear of left duplicate gear S1-4, the left side gear of right duplicate gear S2-4 engages with the outer gear of right planetary pinion T2-13, and the power of right planetary pinion T2-13 is passed to follow-up relevant apparatus by the right side gear of right duplicate gear S2-4.
Shown in Figure 11, left track drive part N1 comprises left actuation gear N1-1, back-up ring eight N1-2, clamping bolt ten N1-3, bearing ten N1-4, left driving shaft N1-5, outside framework oil seal one N1-6, end cap ten N1-7, right side track drive part N2 comprises right actuation gear N2-1, back-up ring nine N2-2, clamping bolt 11 N2-3, bearing 11 N2-4, right driving axle N2-5, outside framework oil seal two N2-6, end cap 11 N2-7, needle bearing three N2-8, wherein, end cap ten N1-7 are installed on casing W by clamping bolt ten N1-3, left driving shaft N1-5 is installed in end cap ten N1-7 by bearing ten N1-4, outside framework oil seal one N1-6 is installed in end cap ten N1-7, and be set on left driving shaft N1-5, for the dynamic rotary sealing of left actuation gear N1-1, left actuation gear N1-1 is installed on left driving shaft N1-5, and drive left driving shaft N1-5 rotation by spline, wheel travels in driving outside, it is upper that back-up ring eight N1-2 are set in left driving shaft N1-5, for adjusting axial clearance, end cap 11 N2-7 are installed on casing W by clamping bolt 11 N2-3, right driving axle N2-5 is installed in end cap 11 N2-7 by bearing 11 N2-4, outside framework oil seal two N2-6 are installed in end cap 11 N2-7, and be set on right driving axle N2-5, for the dynamic rotary sealing of right actuation gear N2-1, right actuation gear N2-1 is installed on right driving axle N2-5, and drive right driving axle N2-5 rotation by spline, wheel travels in driving outside, back-up ring nine N2-2 are set on right driving axle N2-5, for the inside, one end of adjusting axial clearance right driving axle N2-5, needle bearing three N2-8 are installed, dock with right driving axle N2-5 by needle bearing three N2-8 left driving shaft N1-5 one end.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (10)
1. machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher, comprises power input part, casing, advance and retreat gear deceleration part, advance and retreat gear control section, intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part, transition gearing down part, left track drive part and right side track drive part, it is characterized in that, power input part, advance and retreat gear deceleration part, advance and retreat gear control section, intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part, transition gearing down part, left track drive part and right side track drive part are installed on casing, casing is arranged on engine power outgoing position place, power is connected with advance and retreat gear deceleration part through power input, advance and retreat gear deceleration part is connected with differential planetary transmission electrodeless variable-speed part by intermediate power transmitting portions, differential planetary transmission electrodeless variable-speed part is connected with transition gearing down part, transition gearing down part is connected with left track drive part and right side track drive part respectively, advance and retreat gear control section is connected with advance and retreat gear deceleration part.
2. machinery according to claim 1 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, the concrete linkage structure of each part mentioned above is as follows:
In power input part, power input shaft one end is installed on casing by end cap one is fastening, and the other end is provided with drive bevel gear;
In advance and retreat gear deceleration part, bevel gear back shaft two ends are arranged in casing by bearing, left side driven wheel of differential and right side driven wheel of differential empty set are on bevel gear back shaft, splined hub is between left side driven wheel of differential and right side driven wheel of differential and be set on the spline of bevel gear back shaft, combined cover is set in splined hub, drive bevel gear engages with the bevel gear of left side driven wheel of differential and right side driven wheel of differential simultaneously, power input shaft by drive bevel gear by transmission of power to left side driven wheel of differential and right side driven wheel of differential, right side thrust metal is integrated on bevel gear back shaft, left side thrust metal is positioned at a side of left side driven wheel of differential by snap ring one,
In advance and retreat gear control section, sleeve interference is set in casing, spring seat is arranged on sleeve pipe one side, and gearshift spring and gearshift steel ball are installed in spring seat, shift shaft one end is arranged in sleeve pipe, and the other end is provided with the gearshift keyway for external control bar is installed, and selector fork is sleeved on shift shaft, during Intercalation overlaps simultaneously, and there are neutral gear lock ring, forward gears lock ring and the lock ring that reverses gear in the shift shaft outer installment of inserting sleeve end;
In intermediate power transmitting portions, jack shaft two ends are installed in casing by bearing, and counter shaft driven gear is set on jack shaft, and counter shaft driven gear engages with the outer gear of combined cover;
Differential planetary transmission electrodeless variable-speed part comprises four sliding bearings, it is respectively sliding bearing three, sliding bearing four, sliding bearing five and sliding bearing six, on differential main shaft, be provided with left differential planetary drive part and right differential planetary drive part that structure is identical, and these two planetary reduction gear control sections are about differential driving gear symmetry, differential driving gear is set in differential main shaft, sliding bearing three and sliding bearing five are equipped with in its both sides respectively spacer shell, left gear formula gear ring is sleeved on sliding bearing three, right gear formula gear ring is sleeved on sliding bearing five, left sun gear and right sun gear are set on the spline of differential main shaft outer installment, and sliding bearing four and sliding bearing six respectively spacer shell be loaded on differential main shaft, left gear formula planet carrier is set on sliding bearing four, right gear formula planet carrier is set on sliding bearing six, left lateral star-wheel sliding bearing interference is in left planetary pinion, left planetary pinion is arranged between left gear formula gear ring and left sun gear, and be set on left lateral star-wheel line shaft and slide and rotate by left lateral star-wheel sliding bearing, right lateral star-wheel sliding bearing interference is in right planetary pinion, right planetary pinion is arranged between right gear formula gear ring and right sun gear, and be set on right lateral star-wheel line shaft by right lateral star-wheel sliding bearing, one end interference of left lateral star-wheel line shaft is installed in left gear formula planet carrier, and the other end interference has left lateral star-wheel back-up ring, and one end interference of right lateral star-wheel line shaft is installed in right gear formula planet carrier, and the other end interference has right lateral star-wheel back-up ring, left planetary pinion is circumferentially uniform along left gear formula planet carrier, engage with the internal gear of left gear formula gear ring, the external gear of left sun gear simultaneously, right planetary pinion is circumferentially uniform along right gear formula planet carrier, engages with the internal gear of right gear formula gear ring, the external gear of right sun gear simultaneously, in addition, on left gear formula gear ring, be provided with oil duct one, on left gear formula planet carrier, be provided with oil duct two, on right gear formula gear ring, be provided with oil duct three, on right gear formula planet carrier, be provided with oil duct four, differential main shaft two ends are arranged in casing, symmetrical fastening being installed on casing of left oil hydraulic motor and right oil hydraulic motor, left hydraulic motor gear is set on the spline spindle of left oil hydraulic motor, and left hydraulic motor gear engages with the outer gear of left gear formula gear ring, right hydraulic motor gear is set on the spline spindle of right oil hydraulic motor, and right hydraulic motor gear engages with the outer gear of right gear formula gear ring,
Transition gearing down part comprises two sliding bearings, respectively sliding bearing seven and sliding bearing eight, on transition transmission shaft, be provided with left transition gearing down part and right transition gearing down part that structure is identical, and these two transition gearing down parts are about middle back-up ring symmetry, and transition transmission shaft two ends are arranged in casing, middle back-up ring both sides are respectively arranged with sliding bearing seven and sliding bearing eight, sliding bearing seven is installed on transition transmission shaft with sliding bearing eight transition simultaneously, left duplicate gear is set on transition transmission shaft by sliding bearing seven, right duplicate gear is set on transition transmission shaft by sliding bearing eight, in addition, the right side gear of left duplicate gear engages with left planetary outer gear, and the left side gear of right duplicate gear engages with right planetary outer gear,
Left track drive part comprises a bearing, an end cap and a back-up ring, respectively bearing ten, end cap ten and back-up ring eight, end cap ten is installed on casing, left driving shaft is installed in end cap ten by bearing ten, left actuation gear is installed on left driving shaft, and back-up ring eight is set on left driving shaft;
Right side track drive part comprises a bearing, an end cap and a back-up ring, respectively bearing 11, end cap 11 and back-up ring nine, end cap 11 is installed on casing, right driving axle is installed in end cap 11 by bearing 11, right actuation gear is installed on right driving axle, and back-up ring nine is set on right driving axle; And left driving shaft docks with right driving axle.
3. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, is also provided with box sealing lid one, box sealing lid two and oilhole plug screw on casing.
4. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, between splined hub and left side driven wheel of differential, is provided with back-up ring one, between splined hub and right side driven wheel of differential, is provided with back-up ring two.
5. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, the side that left side driven wheel of differential is set in bevel gear back shaft is provided with needle bearing one.
6. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, the side that right side driven wheel of differential is set in bevel gear back shaft is provided with needle bearing two.
7. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, left side driven wheel of differential is set on bevel gear back shaft by left sliding bearing.
8. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, right side driven wheel of differential is set on bevel gear back shaft by right sliding bearing.
9. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, is provided with for selector fork is carried out to spacing snap ring four on declutch shift shaft.
10. machinery according to claim 2 directly drives hydraulic pressure double controlled endless-track vehicle buncher, it is characterized in that, needle bearing three is installed in right driving axle one end, and left driving shaft docks with right driving axle by needle bearing three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420413379.4U CN204004226U (en) | 2014-07-25 | 2014-07-25 | Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420413379.4U CN204004226U (en) | 2014-07-25 | 2014-07-25 | Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher |
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| Publication Number | Publication Date |
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| CN204004226U true CN204004226U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420413379.4U Withdrawn - After Issue CN204004226U (en) | 2014-07-25 | 2014-07-25 | Machinery directly drives hydraulic pressure double controlled endless-track vehicle buncher |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141748A (en) * | 2014-07-25 | 2014-11-12 | 湖南农业大学 | Continuously-variable transmission for mechanical direct-drive hydraulic double-control tracked vehicle |
| CN108443455A (en) * | 2018-06-19 | 2018-08-24 | 张祝 | A kind of driving method for filter vibration |
| CN108854223A (en) * | 2018-06-19 | 2018-11-23 | 张祝 | A kind of vibration filtering output driving device |
-
2014
- 2014-07-25 CN CN201420413379.4U patent/CN204004226U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141748A (en) * | 2014-07-25 | 2014-11-12 | 湖南农业大学 | Continuously-variable transmission for mechanical direct-drive hydraulic double-control tracked vehicle |
| CN108443455A (en) * | 2018-06-19 | 2018-08-24 | 张祝 | A kind of driving method for filter vibration |
| CN108854223A (en) * | 2018-06-19 | 2018-11-23 | 张祝 | A kind of vibration filtering output driving device |
| CN108854223B (en) * | 2018-06-19 | 2020-07-31 | 张祝 | Vibration filtering output driving device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20150429 |