CN108825740B - Rear reverse gear tracked vehicle transmission - Google Patents
Rear reverse gear tracked vehicle transmission Download PDFInfo
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- CN108825740B CN108825740B CN201811036329.8A CN201811036329A CN108825740B CN 108825740 B CN108825740 B CN 108825740B CN 201811036329 A CN201811036329 A CN 201811036329A CN 108825740 B CN108825740 B CN 108825740B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
Abstract
A kind of postposition is the tracked vehicle speed change gear of the reverse gear, including installing the variable speed drive assembly in the assembly of the housing, the differential steering assembly, double-flow drive assembly, power transmission assembly and power output and switching operation assembly, wherein, the variable speed drive assembly is connected with differential steering assembly, double-flow drive assembly, the differential steering assembly is connected with double-flow drive assembly, and share the same steering shaft, the double-flow drive assembly is connected with power transmission assembly, the power transmission assembly is connected with power output and switching operation assembly, adopt HST stepless steering and mechanical type to go and make up the power double-flow to input, in order to realize the differential type steering of both sides of the track, the steering radius can change continuously, the turning characteristic is accurate; the power input by the sun gear is converged with the power input by the gear ring and then is output by the gear ring of the planetary gear mechanism, the double-flow input adopts the coaxial transmission of the planetary gear, the structure is compact, the work is reliable, the reverse gear is arranged at the rear end of the double-flow output, and the improvement of the steering operation convenience and the driving safety is facilitated.
Description
Technical Field
The invention relates to the technical field of variable speed transmission, in particular to a crawler vehicle speed changer with a rear reverse gear.
Background
When the left crawler belt and the right crawler belt have a rotation speed difference, the tracked vehicle can realize steering. The present common driving scheme has multiple modes of electric transmission, hydraulic transmission, mechanical transmission and the like, and has wide application because of high efficiency of mechanical transmission, in the mechanical transmission scheme, single-flow transmission and double-flow transmission are mainly adopted, a tracked vehicle speed changer with double-flow (double-power flow) input power is adopted, two sets of planetary gear mechanisms are usually adopted to ensure that the power input by a speed change mechanism and the power input by a steering mechanism are merged after being connected in parallel, the power input by the speed change mechanism is input by a gear ring or a sun gear of the planetary gear mechanism, the power input by the steering mechanism is input by the sun gear or the gear ring of the planetary gear mechanism, and the merged power is output by a planet carrier; in double-flow transmission, if the steering input power is input in a stepless speed change mode, the steering is flexible, the steering radius can be continuously changed, the steering angular speed and the rotating speed input by the steering mechanism form a certain proportional relation, the steering is accurate, and the performance is excellent; in the double-flow transmission scheme adopting the planetary gear mechanism, the steering operation direction of a steering operation mechanism (a steering wheel or a steering pull rod) is unchanged (for example, for the steering operation mechanism of the steering wheel type, the steering wheel is deviated to the left side or the right side when the steering wheel moves forwards and backwards), taking the left operation steering mechanism as an example, when the steering mechanism is operated leftwards, after power confluence, the left side crawler belt is decelerated, the right side crawler belt is accelerated, the crawler vehicle turns leftwards, when the steering mechanism is operated backwards, the speed change input power is reversed, the direction of the steering input power is unchanged, although the crawler vehicle runs backwards, the change rule of the left side crawler belt and the right side crawler belt is unchanged because the deflection direction of the steering mechanism is unchanged, namely: the left crawler belt decelerates relative to the advancing direction, the right crawler belt accelerates relative to the advancing direction (namely, the left crawler belt accelerates and backs up, and the right crawler belt decelerates and backs up), the crawler vehicle backs up to the right, the steering mechanism deflects to the left, and turns to the left when advancing and turns to the right when backing up, so that the operation is difficult, and even safety accidents occur; particularly for a crawler tractor, a crawler rotary cultivator or a crawler transport vehicle for agricultural production, the gear change is less under the condition of non-road operation, and the forward and reverse switching is very frequent, so that the potential safety hazard exists.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a rear reverse tracked vehicle transmission to solve the above drawbacks of the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the utility model provides a crawler vehicle derailleur of rearmounted reverse gear, including installing the variable speed drive subassembly in the box subassembly, differential steering subassembly, double-flow drive assembly, power transmission subassembly and power take off and conversion operation subassembly, wherein, variable speed drive subassembly and differential steering subassembly, double-flow drive assembly is connected, differential steering subassembly is connected with double-flow drive assembly, and differential steering subassembly and double-flow drive assembly share same steering shaft, double-flow drive assembly is connected with power transmission subassembly, power transmission subassembly and power take off and conversion operation subassembly are connected, concrete structure is as follows:
the box body component comprises a main box body and an auxiliary box body;
in the variable-speed transmission assembly, a first shaft and a second shaft are arranged on a main box body, a first gear driving gear, a second gear driving gear, a third gear driving gear and a fourth gear driving gear are sequentially arranged on the first shaft in an empty sleeve manner, a second gear spline hub and a third and fourth gear spline hub are arranged on the first shaft in a spline fit manner, the first shaft is fixedly connected with a first gear spline hub, a second gear spline hub and a third and fourth gear spline hub for transmission, a first gear and second gear combination sleeve for inserting a first gear shifting fork and a second gear shifting fork is arranged on the first gear spline hub, a third gear and fourth gear spline hub is arranged on the second gear spline hub, a third gear and fourth gear spline combination sleeve is arranged on the third and fourth gear spline hub for insertion, a third and fourth gear combination sleeve is arranged on the third gear spline hub in a spline fit manner, shifting grooves are arranged on the outer circumference of the first gear and second gear spline sleeve, a shifting groove is circumferentially formed in the outer part of the third-fourth gear combination sleeve, and a third-fourth gear shifting fork is inserted into the shifting groove of the third-fourth gear combination sleeve so as to limit the axial position of the third-fourth gear combination sleeve; the second shaft is sequentially provided with a first-gear driven gear meshed with the first-gear driving gear, a second-gear driven gear meshed with the second-gear driving gear, a third-gear driven gear meshed with the third-gear driving gear and a fourth-gear driven gear meshed with the fourth-gear driving gear, and power is output from the third-gear driven gear of the second shaft;
in the differential steering assembly, a steering shaft is arranged on a main box body and a differential steering end cover, a driving bevel gear is arranged at one end of the steering shaft, and a right sun gear and a steering driven gear are arranged at the other end of the steering shaft; the connecting shaft is arranged on the steering shaft, a driven bevel gear meshed with the driving bevel gear is arranged at one end of the connecting shaft, and a left sun gear is arranged at the other end of the connecting shaft; the planetary gear shaft is fixed on the differential steering end cover, and the planetary gear is arranged on the planetary gear shaft;
an HST input shaft of the hydrostatic stepless speed change device is connected with a shaft, and a steering driving gear which is normally meshed with a steering driven gear is installed on an HST output shaft of the hydrostatic stepless speed change device;
in the double-current driving assembly, a right planetary gear carrier is arranged on a steering shaft, a left planetary gear carrier is arranged on a connecting shaft, a left driving gear and a left planetary gear are arranged on the left planetary gear carrier, and a plurality of left planetary gears are uniformly distributed around a left sun gear; the right planetary gear carrier is provided with a right driving gear and a right planetary gear, and a plurality of right planetary gears are uniformly distributed around the right sun gear;
the gear ring frame is arranged in the middle of the steering shaft, an input gear normally meshed with the three-gear driven gear is arranged on the outer side of the gear ring frame, a left gear ring and a right gear ring are arranged on the inner side of the gear ring frame, the left gear ring is normally meshed with the left planetary gear, the right gear ring is normally meshed with the right planetary gear, the left planetary gear is normally meshed with the left sun gear, and the right planetary gear is normally meshed with the right sun gear;
in the power transmission assembly, an idler shaft and a reverse gear shaft are arranged on a main box body, a left idler and a right idler are arranged on the idler shaft, the left idler is normally meshed with a left driving gear, and the right idler is normally meshed with a right driving gear; the left end of the reverse gear shaft is provided with a left reverse gear input gear and a left reverse gear output gear, the right end of the reverse gear shaft is provided with a right reverse gear input gear and a right reverse gear output gear, the left reverse gear input gear is normally meshed with a left idle gear, and the right reverse gear input gear is normally meshed with a right idle gear;
in the power output and conversion operation assembly, one end of a left driving output shaft is installed on a main box body, the other end of the left driving output shaft is installed in a right driving output shaft, a left driving reverse gear output gear, a left driving output gear and a left spline hub are installed on the left driving output shaft, a left combining sleeve for inserting a left shifting fork is installed on the left spline hub, the left spline hub and the left combining sleeve are in matched transmission through an internal spline and an external spline, a shifting groove for inserting the left shifting fork is formed in the peripheral direction of the outer portion of the left combining sleeve, and the left shifting fork is inserted into the shifting groove of the left combining sleeve to limit the axial position of the; the left driving output gear is normally meshed with the left idle gear, and the left driving reverse gear output gear is normally meshed with the left reverse gear output gear; the two ends of a right driving output shaft are respectively installed on the main box body, a right driving output gear, a right driving reverse gear output gear and a right spline hub are installed on the right driving output shaft, a right combination sleeve used for inserting a right shifting fork is installed on the right spline hub, the right spline hub and the right combination sleeve are in matched transmission through internal and external splines, a shifting groove used for inserting the right shifting fork is circumferentially arranged outside the right combination sleeve, the right shifting fork is inserted into the shifting groove of the right combination sleeve to limit the axial position of the right combination sleeve, the right driving output gear is normally meshed with a right idle gear, and the right driving reverse gear output gear is normally meshed with the right reverse gear output gear; the reversing shifting fork shaft is arranged on the main box body, and the left shifting fork and the right shifting fork are arranged on the reversing shifting fork shaft.
In the invention, a first-gear spline hub and a second-gear spline hub are arranged on a shaft between a first-gear driving gear and a second-gear driving gear.
In the present invention, the three-and-four-speed splined hub is mounted on a shaft located between the three-speed drive gear and the four-speed drive gear.
In the present invention, the number of the left planetary gears is any one of 2, 3, and 4.
In the present invention, the number of right planetary gears is any one of 2, 3, and 4.
In the invention, the left reverse gear input gear and the left reverse gear output gear are in spline fit connection.
In the invention, the right reverse gear input gear and the right reverse gear output gear are in spline fit connection.
In the present invention, the left splined hub is mounted on the left drive output shaft between the left drive output gear and the left drive reverse output gear.
In the present invention, the right splined hub is mounted on the right drive output shaft between the right drive output gear and the right drive reverse output gear.
In the invention, the reversing shifting fork shaft is arranged on the main box body through a spring steel ball self-locking mechanism.
In the present invention, forward straight running
The reversing shifting fork is shifted to the left side along the axial direction and is arranged in a forward gear to drive the left shifting fork shaft and the right shifting fork shaft to move left;
the left shifting fork shaft moves left to drive the left shifting fork to move left, so as to drive the left combination sleeve to move left to be combined with the left driving output gear;
the right shifting fork shaft moves left to drive the right shifting fork to move left, so as to drive the right combination sleeve to move left to be combined with the right driving output gear;
the HST output shaft irrotational installs all gears on the steering spindle and all irrotational, therefore left sun gear and right sun gear irrotational, and power is through variable speed transmission to input gear, and then divide two the tunnel, transmits to the left drive driving gear all the way, and another way transmits to the right drive driving gear:
the power transmitted to the left driving gear drives the left crawler belt from an input gear, a gear ring frame, a left gear ring, a left planetary gear carrier, a left driving gear, a left idle gear, a left driving output gear, a left combining sleeve and a left spline hub to a left driving output shaft;
the power transmitted to the right driving gear drives the right crawler belt from an input gear, a gear ring frame, a right gear ring, a right planetary gear carrier, a right driving gear, a right idle gear, a right driving output gear, a right combination sleeve and a right spline hub to a right driving output shaft;
because the rotating speed of the left sun wheel is the same as that of the right sun wheel and the direction is opposite, the forces acting on the steering shaft through the left planetary gear and the right planetary gear are the same in magnitude and opposite in direction, the steering shaft is self-locked, and the tracked vehicle runs in a straight line when going forward;
forward steering driving
When the bicycle runs forwards, the reversing shifting fork shaft is shifted to the left side and is arranged at a forward gear to drive the left shifting fork shaft and the right shifting fork shaft to move left;
the left shifting fork shaft moves left to drive the left shifting fork to move left, so as to drive the left combination sleeve to move left to be combined with the left driving output gear;
the right shifting fork shaft moves left to drive the right shifting fork to move left, so as to drive the right combination sleeve to move left to be combined with the right driving output gear;
when steering is needed, the HST output shaft is controlled to rotate under the action of hydraulic pressure, the HST output shaft drives all gears mounted on the steering shaft to rotate, the rotating speeds of the left sun gear and the right sun gear are the same and opposite in direction, power is converged by double flows, so that the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased, so that a rotating speed difference occurs between the left crawler belt and the right crawler belt, and the crawler belt vehicle moves forwards in a steering mode;
backward straight running
When the bicycle runs backwards, the reversing shifting fork is arranged on the backward gear in a shifting manner towards the right side to drive the left shifting fork shaft and the right shifting fork shaft to move rightwards;
the left shifting fork shaft moves rightwards to drive the left shifting fork to move rightwards, and then the left combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right shifting fork shaft moves rightwards to drive the right shifting fork to move rightwards, so as to drive the right combination sleeve to move rightwards to be combined with the right driving reverse gear output gear;
the HST output shaft irrotational installs all gears on the steering spindle and all irrotational, therefore left sun gear and right sun gear irrotational, and power is through variable speed transmission to input gear, and then divide two the tunnel, transmits to the left drive driving gear all the way, and another way transmits to the right drive driving gear:
the power transmitted to the left driving gear drives the left crawler belt from an input gear, a gear ring frame, a left gear ring, a left planetary gear carrier, a left driving gear, a left idle gear, a left reverse gear input gear, a left reverse gear output gear, a left driving reverse gear output gear, a left combination sleeve and a left spline hub to a left driving output shaft;
the power transmitted to the right driving gear drives the right crawler belt from an input gear, a gear ring frame, a right gear ring, a right planetary gear carrier, a right driving gear, a right idle gear, a right reverse gear input gear, a right reverse gear output gear, a right driving reverse gear output gear, a right combination sleeve and a right spline hub to a right driving output shaft;
because the rotating speed of the left sun wheel is the same as that of the right sun wheel and the direction is opposite, the forces acting on the steering shaft through the left planetary gear and the right planetary gear are the same in magnitude and opposite in direction, the steering shaft is self-locked, and the tracked vehicle moves in a backward straight line;
backward steering driving
When the bicycle runs backwards, the reversing shifting fork is arranged on the backward gear in a shifting manner towards the right side to drive the left shifting fork shaft and the right shifting fork shaft to move rightwards;
the left shifting fork shaft moves rightwards to drive the left shifting fork to move rightwards, and then the left combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right shifting fork shaft moves rightwards to drive the right shifting fork to move rightwards, so as to drive the right combination sleeve to move rightwards to be combined with the right driving reverse gear output gear;
when steering is needed, the HST output shaft rotates under the action of hydraulic pressure, the HST output shaft drives all gears mounted on the steering shaft to rotate, the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased respectively after power is converged through double-flow driving, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased respectively, so that the rotating speed difference of the left crawler belt and the right crawler belt occurs, and the crawler belt vehicle runs in a reverse steering mode.
Has the advantages that:
1) the invention adopts HST stepless steering and mechanical multi-gear running to form power double-flow input, realizes differential steering on two sides of the crawler belt, and has continuously variable steering radius and steering accuracy.
2) The steering power is input by the sun gear of the planetary gear mechanism, the driving power is input by the gear ring of the planetary gear mechanism, the power is output by the gear ring of the planetary gear mechanism after being converged, and the double-current input adopts the coaxial transmission of the planetary gear, so the structure is compact and the work is reliable.
3) The reverse gear is arranged at the rear end of the double-current output, so that the motion law of a steering system is ensured to be unchanged under the same steering condition, and the steering operation convenience and the driving safety are improved.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
FIG. 2 is a schematic structural view of a variable speed drive assembly in a preferred embodiment of the present invention.
FIG. 3 is a schematic structural view of a differential steering assembly in a preferred embodiment of the present invention.
FIG. 4 is a schematic structural diagram of a dual-flow driving assembly in a preferred embodiment of the present invention.
FIG. 5 is a schematic structural diagram of a power transmission assembly according to a preferred embodiment of the invention.
FIG. 6 is a schematic diagram of the power take-off and conversion operation assembly in the preferred embodiment of the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1 to 6, the crawler vehicle transmission with the rear reverse gear comprises a speed change transmission assembly P1, a differential steering assembly P2, a double-flow driving assembly P3, a power transmission assembly P4 and a power output and conversion operation assembly P5 which are arranged in a box assembly B, wherein the speed change transmission assembly P1 is connected with the differential steering assembly P2 and the double-flow driving assembly P3, the differential steering assembly P2 is connected with the double-flow driving assembly P3, the differential steering assembly P2 and the double-flow driving assembly P3 share the same steering shaft S3, the double-flow driving assembly P3 is connected with the power transmission assembly P4, and the power transmission assembly P4 is connected with the power output and conversion operation assembly P5, and the specific structure is as follows:
the box body component B comprises a main box body B1 and an auxiliary box body B2;
the speed change transmission assembly P1 comprises a first shaft S11, a second shaft S2, a first gear driving gear G11, a second gear driving gear G12, a third gear driving gear G13, a fourth gear driving gear G14, a first gear driven gear G21, a second gear driven gear G22, a third gear driven gear G23, a fourth gear driven gear G24, a second gear spline hub H11, a third and fourth gear spline hub H12, a second gear coupling sleeve H21, a third and fourth gear coupling sleeve H22, a second gear shift fork H31, a third and fourth gear shift fork H32, an oil seal X1, a deep groove X21, a perforated end cover X31, a non-perforated end cover X32, a fastening screw X4, a sealing gasket X5, a retaining ring X6, a shaft sleeve X7 and a snap ring X8, wherein two ends of the first shaft S11 are respectively installed on the perforated end cover X1 through the oil seal X1, the perforated end cover X1 is installed on a perforated end cover X1 through the fastening screw X1, a main shaft S1, a left side screw driving gear box is sequentially installed on a first, A second-gear driving gear G12, a third-gear driving gear G13 and a fourth-gear driving gear G14, wherein a second-gear spline hub H11 is arranged on a shaft S11 between the first-gear driving gear G11 and the second-gear driving gear G12 in a spline fit manner, a third-fourth-gear spline hub H12 is arranged on a shaft S11 between the third-gear driving gear G13 and the fourth-gear driving gear G14 in a spline fit manner, a shaft S11 is fixedly connected with a second-gear spline hub H11 and a third-fourth-gear spline hub H12 for transmission, a second-gear spline hub H11 is provided with a second-gear combining sleeve H21 for inserting the second-gear shifting fork H31, a third-fourth-gear spline hub H12 is provided with a third-fourth-gear combining sleeve H22 for inserting the third-fourth-gear shifting fork H32, a second-gear spline hub H11 and a second-gear combining sleeve H21 are in a fit transmission through internal and external splines, a third-fourth-gear spline hub H12 is in a fit transmission with a third, a second gear shifting fork H31 is inserted into a shifting groove of a second gear combination sleeve H21 to limit the axial position of a second gear combination sleeve H21, a shifting groove is circumferentially arranged outside a third-fourth gear combination sleeve H22, and a third-fourth gear shifting fork H32 is inserted into a shifting groove of a third-fourth gear combination sleeve H22 to limit the axial position of a third-fourth gear combination sleeve H22; two ends of a secondary shaft S2 are respectively installed on an imperforate end cover X32 through an oil seal X1 and a deep groove ball bearing X21, the imperforate end cover X32 is installed on a main box body B1 through a fastening screw X4 and a sealing gasket X4, the secondary shaft S2 is sequentially provided with a first-gear driven gear G21, a second-gear driven gear G22, a third-gear driven gear G23 and a fourth-gear driven gear G24, and power is output from a third-gear driven gear G23 of a secondary shaft S2; a retainer ring X6 and a shaft sleeve X7 are respectively arranged on the first shaft S11 and the second shaft S2;
the differential steering assembly P2 comprises an HST input shaft S12, an HST output shaft S13, a steering shaft S3, a driving bevel gear G31, a planetary gear G32, a driven bevel gear G33, a left sun gear G341, a right sun gear G342, a steering driven gear G26, a planetary gear shaft P21, a connecting shaft P22, a thrust bearing X23, a needle bearing X24, a holed end cover X31, a holed end cover X32, a fastening screw X4, a sealing gasket X5 and a snap ring X8, wherein one end of the steering shaft S3 is mounted on the holed end cover X32 through the thrust bearing X23, the holed end cover X32 is mounted on the main case B1 through the fastening screw X4, and the end is provided with the driving bevel gear G31, the other end of the steering shaft S3 is mounted on the right planetary gear carrier P23 through the needle bearing X24 and then mounted on the main case B1 through the thrust bearing X23, and the right sun gear G26 and the driven gear G46; a connecting shaft P22 is mounted on the steering shaft S3 through a needle bearing X24 and a thrust bearing X23, one end of the connecting shaft P22 is provided with a driven bevel gear G33 meshed with the drive bevel gear G31, and the other end of the connecting shaft P22 is provided with a left sun gear G341; the planet gear shaft P21 is fixed on the differential steering end cover, the planet gear G32 is arranged on the planet gear shaft P21, and the driving bevel gear G31, the planet gear shaft P21, the planet gear G32 and the driven bevel gear G33 form a reverse transmission mechanism; a steering driving gear G25 which is constantly meshed with the steering driven gear G26 is arranged on the HST output shaft S13 through a spline and a snap ring X8;
an HST input shaft S12 of the hydrostatic continuously variable transmission is connected with a shaft S11, steering power is input from an HST input shaft S12, an HST output shaft S13 drives a steering driving gear G25 and further drives a steering driven gear G26, a steering driven gear G26 drives a steering shaft S3 and further drives a right sun gear G342 and a driving bevel gear G31;
the double-flow driving assembly P3 comprises a steering shaft S3, a left driving gear G351, a right driving gear G352, a left planetary gear G361, a right planetary gear G362, a left gear ring G371, a right gear ring G372, an input gear G38, a connecting shaft P22, a left planetary gear carrier P23, a gear ring carrier P24, a right planetary gear carrier P25, a deep groove ball bearing X21, a flange bearing X22, a thrust bearing X23, a needle bearing X24, a perforated end cover X31, a non-perforated end cover X32, a fastening screw X4, a sealing gasket X5 and a clamping ring X8, a right planetary carrier P25 is mounted on the steering shaft S3 through a needle bearing X24, a left planetary carrier P23 is mounted on the connecting shaft P22 through a needle bearing X24, a left driving gear G351 and left planetary gears G361 are arranged on the left planetary carrier P23, the left planetary gears G361 are uniformly distributed around the left sun gear G341, and the number of the left planetary gears G361 is n (n is any one of 2, 3 and 4); the right planet carrier P25 is provided with a right driving gear G352 and right planet gears G362, the right planet gears G362 are uniformly distributed around the right sun gear G342, and the number of the right planet gears G362 is n (n can be any one of 2, 3 and 4);
the ring gear frame P24 is installed in the middle of a steering shaft S3 through a deep groove ball bearing X21, an input gear G38 which is normally meshed with a three-gear driven gear G23 is arranged on the outer side of the ring gear frame P24, a left ring gear G371 and a right ring gear G372 are arranged on the inner side of the ring gear frame P24, the left ring gear G371 is normally meshed with a left planetary gear G361, the right ring gear G372 is normally meshed with a right planetary gear G362, the left planetary gear G361 is normally meshed with a left sun gear G341, and the right planetary gear G362 is normally meshed with a right sun gear G342;
since the right sun gear G342 is constantly meshed with the right planetary gear G362, the right sun gear G342 rotates to drive the right planetary gear G362 to rotate, so that the right ring gear P34 rotates;
the driving bevel gear G31 rotates to drive the planetary gear G32 to rotate so as to drive the driven bevel gear G33 to rotate, the driven bevel gear G33 drives the connecting shaft P22 to rotate so as to drive the left sun gear G341, and the planetary gear shaft P21 is fixed on the differential steering end cover, so that the driven bevel gear G33 and the driving bevel gear G31 have the same rotating speed and opposite directions, namely the rotating speed of the left sun gear G341 is the same as and opposite to the rotating speed of the right sun gear G342;
since the left sun gear G341 is constantly meshed with the left planetary gear G361, the left sun gear G341 rotates to drive the left planetary gear G361 to rotate, so that the left ring gear P32 rotates;
because the rotating speed of the left sun gear G341 is the same as that of the right sun gear G342 and the direction is opposite, the rotating speed of the left gear ring frame P32 is the same as that of the right gear ring frame P34 and the direction is opposite, after power is converged through double-flow driving, a steering difference occurs between the left driving gear G351 and the right driving gear G352, and differential steering is realized;
the power transmission assembly P4 comprises an idler shaft S4, a left idler wheel G41, a right idler wheel G42, a reverse gear shaft S5, a left reverse gear input gear G511, a left reverse gear output gear G512, a right reverse gear input gear G521, a right reverse gear output gear G522, a deep groove ball bearing X21, a non-porous end cover X32, a fastening screw X4, a sealing gasket X5, a sealing ring X6, a shaft sleeve X7 and a clamping ring X8, wherein two ends of the idler shaft S4 are mounted on the non-porous end cover X32 through the deep groove ball bearing X21, the non-porous end cover X32 is mounted on a main box body B1 through the fastening screw X4 and the sealing gasket X5, the left idler wheel G41 and the right idler wheel G42 are mounted on the idler shaft S7 through the shaft sleeve X7 and the clamping ring X7, the left idler wheel G7 is normally meshed with a left driving gear G351; two ends of a reverse gear shaft S5 are mounted on an imperforate end cover X32 through a deep groove ball bearing X21, the imperforate end cover X32 is mounted on a main box body B1 through a fastening screw X4 and a sealing gasket X5, a left reverse gear input gear G511 is in spline fit connection with a left reverse gear output gear G512, the left reverse gear input gear G511 is mounted at the left end of the reverse gear shaft S5 through a shaft sleeve X7 and a clamping ring X8, a right reverse gear input gear G521 is in spline fit connection with a right reverse gear output gear G522, the right reverse gear input gear G521 is mounted at the right end of the reverse gear shaft S5 through a shaft sleeve X7 and a clamping ring X8, the left reverse gear input gear G511 is in constant mesh with a left idle gear G41, and the right;
the power output and conversion operation assembly P5 comprises a left drive output shaft S61, a left drive reverse gear output gear G61, a left drive output gear G62, a right drive output shaft S62, a right drive output gear G63, a right drive reverse gear output gear G64, a left spline hub H13, a left combination sleeve H23, a left shifting fork H33, a right spline hub H14, a right combination sleeve H24, a right shifting fork H34, a reversing shifting fork H4, a spring steel ball self-locking mechanism Z, an oil seal X1, a deep groove ball bearing X21, a flange bearing X22, a needle bearing X24, a perforated end cover X31, a fastening screw X4, a sealing gasket X5, a retaining ring X6, a shaft sleeve X7, a clamping ring X8 and a sealing ring X9, one end of a right driving output shaft S62 is installed on a perforated end cover X31 through an oil seal X1 and a deep groove ball bearing X21, the perforated end cover X31 is installed on a main box body B1 through a fastening screw X4 and a sealing gasket X5, and the other end of the right driving output shaft S62 is installed on the main box body B1 through a deep groove ball bearing X21; the right driving output gear G63 and the right driving reverse gear output gear G64 are mounted on a right driving output shaft S62 in an empty way through a shaft sleeve X6, a right spline hub H14 is mounted on a right driving output shaft S62 between the right driving output gear G63 and the right driving reverse gear output gear G64 in a spline fit mode, a right combining sleeve H24 used for inserting a right shifting fork H34 is mounted on the right spline hub H14, the right spline hub H14 and the right combining sleeve H24 are in internal and external spline fit transmission, a shifting groove is formed in the outer circumference of the right combining sleeve H24, the right shifting fork H34 is inserted into the shifting groove of the right combining sleeve H24 to limit the axial position of the right combining sleeve H24, the right driving output gear G63 is normally meshed with the right idle gear G42, and the right driving reverse gear output gear G64 is normally meshed with the right reverse gear output gear G522; one end of a left driving output shaft S61 is arranged on a perforated end cover X31 through an oil seal X1 and a deep groove ball bearing X21, the perforated end cover X31 is arranged on a main box body B1 through a fastening screw X4 and a sealing gasket X5, the other end of the left driving output shaft S61 is arranged in a right driving output shaft S62 through a clamping ring X8, a left driving reverse gear output gear G61 and a left driving output gear G62 are arranged on the left driving output shaft S61 in an empty mode through a shaft sleeve X6, a left spline hub H13 is arranged on a left driving output shaft S61 between the left driving reverse gear output gear G61 and the left driving output gear G62 in a spline fit mode, a left combining sleeve H23 for inserting a left shifting fork H33 is arranged on the left spline hub H13, the left spline hub H13 and the left combining sleeve H23 are in internal and external spline fit transmission, a shifting groove is formed in the outer circumferential direction of the left combining sleeve H23, and the left shifting fork H33 is inserted into the shifting groove of the left combining sleeve H23 to limit the axial position of the left combining sleeve H23; the left drive output gear G61 is in constant mesh with the left idler gear G41, and the left drive reverse output gear G62 is in constant mesh with the left reverse output gear G512;
the reversing shifting fork shaft H4 is mounted on a main box body B1 through a spring steel ball self-locking mechanism Z and a sealing ring X9, and a left shifting fork H33 and a right shifting fork H34 are mounted on the reversing shifting fork shaft H4.
1) A power transmission route:
first gear: a second gear shifting fork H31 drives a second gear combination sleeve H21 to move left, power is transmitted to the second gear combination sleeve H21, a first gear driving gear G11 and a first gear driven gear G21 from a first shaft S11 through a second gear spline hub H31 to a second shaft S2, and is output from a third gear driven gear G23;
and (2) second: a second gear shifting fork H31 drives a second gear combination sleeve H21 to move right, power is transmitted to the second gear combination sleeve H21, a second gear driving gear G12 and a second gear driven gear G24 from a first shaft S11 through a second gear spline hub H31 to a second shaft S2, and the power is output from a third gear driven gear G23;
and (3) third gear: the third-fourth gear shifting fork H32 drives the third-fourth gear combination sleeve H22 to move left, power is transmitted to the third-fourth gear combination sleeve H22 and the third-fourth gear driving gear G13 through a shaft S11 and a third-fourth gear spline hub H12, and is output by a third-fourth gear driven gear G23;
fourth gear: the third-fourth gear shifting fork H32 drives the third-fourth gear combination sleeve H22 to move right, power is transmitted to the third-fourth gear combination sleeve H22, the fourth-gear driving gear G14 and the fourth-gear driven gear G24 from a shaft S11 through the third-fourth gear spline hub H12 to a second shaft S2, and the power is output from the third-fourth gear driven gear G23;
2) straight ahead travel
When the bicycle runs forwards, the reversing shifting fork shaft H4 is shifted to the left side to be arranged in a forward gear, so that the left shifting fork shaft H41 is driven, and the right shifting fork shaft H44 moves leftwards;
the left shifting fork shaft H41 moves leftwards to drive the left shifting fork H33 to move leftwards, and further drive the left combination sleeve H23 to move leftwards to be combined with the left driving output gear G62;
the right shifting fork shaft H44 moves leftwards to drive the right shifting fork H34 to move leftwards, and further drive the right combination sleeve H24 to move leftwards to be combined with the right driving output gear G73;
the HST output shaft S13 does not rotate, and since the HST output shaft S13 does not rotate, all gears mounted on the steering shaft S3 do not rotate, so the left sun gear G34 and the right sun gear G35 do not rotate, power is transmitted to the input gear G38 through speed change, and then divided into two paths, one path is transmitted to the left driving gear G351, and the other path is transmitted to the right driving gear G352:
the power transmitted to the left driving gear G351 drives the left crawler by an input gear G38, a gear ring carrier P24, a left gear ring G371, a left planetary gear G361, a left planetary gear carrier P23, a left driving gear G351, a left idle gear G41, a left driving output gear G61, a left coupling sleeve H23, a left spline hub H13 to a left driving output shaft S61;
the power transmitted to the right driving gear G352 drives the right crawler by an input gear G38, a ring gear carrier P24, a right ring gear G372, a right planetary gear G362, a right planetary gear carrier P25, a right driving gear G352, a right idle gear G42, a right driving output gear G63, a right coupling sleeve H24, a right spline hub H14 to a right driving output shaft S62;
since the rotation speed of the left sun gear G341 is the same as the rotation speed of the right sun gear G342 and the direction is opposite, the forces acting on the steering shaft S3 through the left planetary gear G361 and the right planetary gear G362 are the same in magnitude and opposite in direction, the steering shaft S3 is self-locked, and the tracked vehicle travels straight forward;
3) forward steering driving
When the bicycle runs forwards, the reversing shifting fork shaft H4 is shifted to the left side to be arranged in a forward gear, so that the left shifting fork shaft H41 is driven, and the right shifting fork shaft H44 moves leftwards;
the left shifting fork shaft H41 moves leftwards to drive the left shifting fork H33 to move leftwards, and further drive the left combination sleeve H23 to move leftwards to be combined with the left driving output gear G62;
the right shifting fork shaft H44 moves leftwards to drive the right shifting fork H34 to move leftwards, and further drive the right combination sleeve H24 to move leftwards to be combined with the right driving output gear G73;
when steering is required, the HST output shaft S13 is controlled to rotate under the action of hydraulic pressure, the HST output shaft S13 drives all gears mounted on the steering shaft S3 to rotate, the rotating speeds of the left sun gear G341 and the right sun gear G342 are the same and opposite, power is converged by two flows, so that the rotating speeds of the left planetary gear carrier P23 and the right planetary gear carrier P25 are increased and decreased, finally, the rotating speeds transmitted to the left driving output shaft S61 and the right driving output shaft S62 are increased and decreased, so that the rotating speed difference of the left side crawler track and the right side crawler track occurs, and the crawler vehicle runs in forward steering;
4) backward straight running
When the vehicle runs backwards, the reversing shifting fork shaft H4 is shifted to the right side and is arranged in a backward gear, and the left shifting fork shaft H41 and the right shifting fork shaft H44 are driven to move rightwards;
the left shifting fork shaft H41 moves rightwards to drive the left shifting fork H33 to move rightwards, and further drive the left combination sleeve H23 to move rightwards to be combined with the left driving reverse gear output gear G61;
the right shifting fork shaft H44 moves rightwards to drive the right shifting fork H34 to move rightwards, and further drive the right combination sleeve H24 to move rightwards to be combined with the right driving reverse gear output gear G64;
the HST output shaft S13 does not rotate, and since the HST output shaft S13 does not rotate, all gears mounted on the steering shaft S3 do not rotate, so the left sun gear G341 and the right sun gear G342 do not rotate, power is transmitted to the input gear G38 through speed change, and then divided into two paths, one path is transmitted to the left driving gear G351, and the other path is transmitted to the right driving gear G352:
the power transmitted to the left driving gear G351 drives the left crawler belt from an input gear G38, a gear ring carrier P24, a left gear ring G371, a left planetary gear G361, a left planetary gear carrier P23, a left driving gear G351, a left idle gear G41, a left reverse gear input gear G511, a left reverse gear output gear G512, a left driving reverse gear output gear G61, a left coupling sleeve H23, a left spline hub H13 to a left driving output shaft S61;
the power transmitted to the right driving gear G352 drives the right crawler by an input gear G38, a ring gear carrier P24, a right ring gear G372, a right planetary gear G362, a right planetary gear carrier P25, a right driving gear G352, a right idle gear G42, a right reverse gear input gear G521, a right reverse gear output gear G522, a right driving output gear G63, a right coupling sleeve H24, a right spline hub H14 to a right driving output shaft S62;
since the rotation speed of the left sun gear G341 is the same as the rotation speed of the right sun gear G342 and the direction is opposite, the forces acting on the steering shaft S3 through the left planetary gear G361 and the right planetary gear G362 are the same in magnitude and opposite in direction, the steering shaft S3 is self-locked, and the tracked vehicle moves in a backward straight line;
5) backward steering driving
When the vehicle runs backwards, the reversing shifting fork shaft H4 is shifted to the right side and is arranged in a backward gear, and the left shifting fork shaft H41 and the right shifting fork shaft H44 are driven to move rightwards;
the left shifting fork shaft H41 moves rightwards to drive the left shifting fork H33 to move rightwards, and further drive the left combination sleeve H23 to move rightwards to be combined with the left driving reverse gear output gear G61;
the right shifting fork shaft H44 moves rightwards to drive the right shifting fork H34 to move rightwards, and further drive the right combination sleeve H24 to move rightwards to be combined with the right driving reverse gear output gear G64;
when steering is required, the HST output shaft S13 is controlled to rotate under the action of hydraulic pressure, the HST output shaft S13 drives all gears mounted on the steering shaft S3 to rotate, the rotating speed of the left sun gear G341 is the same as that of the right sun gear G342, the rotating speeds of the left planetary gear carrier P23 and the right planetary gear carrier P25 are increased and decreased after power is merged through double-flow driving, finally the rotating speeds transmitted to the left driving output shaft S61 and the right driving output shaft S62 are increased and decreased, so that the rotating speed difference of the left side crawler track and the right side crawler track occurs, and the crawler vehicle runs in a reverse steering mode.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a crawler vehicle derailleur of rearmounted reverse gear, including installing the variable speed drive subassembly in the box subassembly, differential steering subassembly, double-flow drive assembly, power transmission subassembly and power take off and conversion operation subassembly, a serial communication port, variable speed drive subassembly and differential steering subassembly, double-flow drive assembly is connected, differential steering subassembly and double-flow drive assembly are connected, and differential steering subassembly and the same steering shaft of double-flow drive assembly sharing, double-flow drive assembly is connected with power transmission subassembly, power transmission subassembly and power take off and conversion operation subassembly are connected, concrete structure is as follows:
the box body component comprises a main box body and an auxiliary box body;
in the variable-speed transmission assembly, a primary shaft and a secondary shaft are arranged on a main box body, a primary gear driving gear, a secondary gear driving gear, a third gear driving gear and a fourth gear driving gear are sequentially arranged on the primary shaft in an empty sleeve way, a first gear spline hub and a second gear spline hub and a third gear spline hub are arranged on a first shaft in a spline fit mode, the first shaft is fixedly connected with a first gear spline hub, a second gear spline hub and a third gear spline hub for transmission, the first gear spline hub and the second gear spline hub are arranged on the first shaft between a first gear driving gear and a second gear driving gear, the second gear spline hub is provided with a first gear combination sleeve for inserting a first gear shifting fork, the third gear spline hub and the fourth gear spline hub are arranged on the first shaft between a third gear driving gear and a fourth gear driving gear, the third gear spline hub and the fourth gear spline hub are provided with a third gear combination sleeve for inserting a third gear shifting fork and a fourth gear combination sleeve, the outer circumference of the first gear combination sleeve and the second gear combination sleeve is provided with a shifting groove for; a first-gear driven gear meshed with the first-gear driving gear, a second-gear driven gear meshed with the second-gear driving gear, a third-gear driven gear meshed with the third-gear driving gear and a fourth-gear driven gear meshed with the fourth-gear driving gear are sequentially arranged on the second shaft;
in the differential steering assembly, a steering shaft is arranged on a main box body and a differential steering end cover, a driving bevel gear is arranged at one end of the steering shaft, and a right sun gear and a steering driven gear are arranged at the other end of the steering shaft; the connecting shaft is arranged on the steering shaft, a driven bevel gear meshed with the driving bevel gear is arranged at one end of the connecting shaft, and a left sun gear is arranged at the other end of the connecting shaft; the planetary gear shaft is fixed on the differential steering end cover, and the planetary gear is arranged on the planetary gear shaft;
an HST input shaft of the hydrostatic stepless speed change device is connected with a shaft, and a steering driving gear which is normally meshed with a steering driven gear is installed on an HST output shaft of the hydrostatic stepless speed change device;
in the double-current driving assembly, a right planetary gear carrier is arranged on a steering shaft, a left planetary gear carrier is arranged on a connecting shaft, a left driving gear and a left planetary gear are arranged on the left planetary gear carrier, and a plurality of left planetary gears are uniformly distributed around a left sun gear; the right planetary gear carrier is provided with a right driving gear and a right planetary gear, and a plurality of right planetary gears are uniformly distributed around the right sun gear;
the gear ring frame is arranged in the middle of the steering shaft, an input gear normally meshed with the three-gear driven gear is arranged on the outer side of the gear ring frame, a left gear ring and a right gear ring are arranged on the inner side of the gear ring frame, the left gear ring is normally meshed with the left planetary gear, the right gear ring is normally meshed with the right planetary gear, the left planetary gear is normally meshed with the left sun gear, and the right planetary gear is normally meshed with the right sun gear;
in the power transmission assembly, an idler shaft and a reverse gear shaft are arranged on a main box body, a left idler and a right idler are arranged on the idler shaft, the left idler is normally meshed with a left driving gear, and the right idler is normally meshed with a right driving gear; the left reverse gear input gear and the left reverse gear output gear are mounted at the left end of the reverse gear shaft and are in spline fit connection with each other, the right reverse gear input gear and the right reverse gear output gear are mounted at the right end of the reverse gear shaft and are in spline fit connection with each other, the left reverse gear input gear is in constant mesh with the left idle gear, and the right reverse gear input gear is in constant mesh with the right idle gear;
in the power output and conversion operation assembly, one end of a left driving output shaft is installed on a main box body, the other end of the left driving output shaft is installed in a right driving output shaft, a left driving reverse gear output gear, a left driving output gear and a left spline hub are installed on the left driving output shaft, the left spline hub is installed on the left driving output shaft between the left driving output gear and the left driving reverse gear output gear, a left combination sleeve for inserting a left shifting fork is installed on the left spline hub, the left spline hub and the left combination sleeve are in matched transmission through internal and external splines, a shifting groove for inserting the left shifting fork is circumferentially arranged outside the left combination sleeve, and the left shifting fork is inserted into the shifting groove of the left combination sleeve to limit the axial position of the left combination sleeve; the left driving output gear is normally meshed with the left idle gear, and the left driving reverse gear output gear is normally meshed with the left reverse gear output gear; the right driving output shaft is installed on the main box body at two ends respectively, a right driving output gear, a right driving reverse gear output gear and a right spline hub are installed on the right driving output shaft, the right spline hub is installed on the right driving output shaft between the right driving output gear and the right driving reverse gear output gear, a right combination sleeve for inserting a right shifting fork is installed on the right spline hub, the right spline hub and the right combination sleeve are in matched transmission through internal and external splines, a shifting groove for inserting the right shifting fork is circumferentially arranged outside the right combination sleeve, the right shifting fork is inserted into the shifting groove of the right combination sleeve to limit the axial position of the right combination sleeve, the right driving output gear is normally meshed with a right idle gear, and the right driving reverse gear output gear is normally meshed with the right reverse gear output gear; the reversing shifting fork shaft is arranged on the main box body, and the left shifting fork and the right shifting fork are arranged on the reversing shifting fork shaft.
2. A rear reverse range tracked vehicle transmission as claimed in claim 1 wherein the number of left planet gears is any one of 2, 3 and 4.
3. A rear reverse range tracked vehicle transmission as claimed in claim 1 wherein the number of right planet gears is any one of 2, 3 and 4.
4. A rear reverse range tracked vehicle transmission as claimed in any one of claims 1 to 3 wherein the tracked vehicle speed change drive is operated by:
1) the reversing shifting fork is shifted to the left side along the axial direction and is arranged in a forward gear to drive the left shifting fork shaft and the right shifting fork shaft to move left;
the left shifting fork shaft moves left to drive the left shifting fork to move left, so as to drive the left combination sleeve to move left to be combined with the left driving output gear;
the right shifting fork shaft moves left to drive the right shifting fork to move left, so as to drive the right combination sleeve to move left to be combined with the right driving output gear;
the HST output shaft irrotational installs all gears on the steering spindle and all irrotational, therefore left sun gear and right sun gear irrotational, and power is through variable speed transmission to input gear, and then divide two the tunnel, transmits to the left drive driving gear all the way, and another way transmits to the right drive driving gear:
the power transmitted to the left driving gear drives the left crawler belt from an input gear, a gear ring frame, a left gear ring, a left planetary gear carrier, a left driving gear, a left idle gear, a left driving output gear, a left combining sleeve and a left spline hub to a left driving output shaft;
the power transmitted to the right driving gear drives the right crawler belt from an input gear, a gear ring frame, a right gear ring, a right planetary gear carrier, a right driving gear, a right idle gear, a right driving output gear, a right combination sleeve and a right spline hub to a right driving output shaft;
because the rotating speed of the left sun wheel is the same as that of the right sun wheel and the direction is opposite, the forces acting on the steering shaft through the left planetary gear and the right planetary gear are the same in magnitude and opposite in direction, the steering shaft is self-locked, and the tracked vehicle runs in a straight line when going forward;
2) the reversing shifting fork is shifted to the left side along the axial direction and is arranged in a forward gear to drive the left shifting fork shaft and the right shifting fork shaft to move left;
the left shifting fork shaft moves left to drive the left shifting fork to move left, so as to drive the left combination sleeve to move left to be combined with the left driving output gear;
the right shifting fork shaft moves left to drive the right shifting fork to move left, so as to drive the right combination sleeve to move left to be combined with the right driving output gear;
when steering is needed, the HST output shaft is controlled to rotate under the action of hydraulic pressure, the HST output shaft drives all gears mounted on the steering shaft to rotate, the rotating speeds of the left sun gear and the right sun gear are the same and opposite in direction, power is converged by double flows, so that the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased, so that a rotating speed difference occurs between the left crawler belt and the right crawler belt, and the crawler belt vehicle moves forwards in a steering mode;
3) the reversing shifting fork is arranged on a backward gear by shifting towards the right side to drive the left shifting fork shaft and the right shifting fork shaft to move right;
the left shifting fork shaft moves rightwards to drive the left shifting fork to move rightwards, and then the left combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right shifting fork shaft moves rightwards to drive the right shifting fork to move rightwards, so as to drive the right combination sleeve to move rightwards to be combined with the right driving reverse gear output gear;
the HST output shaft irrotational installs all gears on the steering spindle and all irrotational, therefore left sun gear and right sun gear irrotational, and power is through variable speed transmission to input gear, and then divide two the tunnel, transmits to the left drive driving gear all the way, and another way transmits to the right drive driving gear:
the power transmitted to the left driving gear drives the left crawler belt from an input gear, a gear ring frame, a left gear ring, a left planetary gear carrier, a left driving gear, a left idle gear, a left reverse gear input gear, a left reverse gear output gear, a left driving reverse gear output gear, a left combination sleeve and a left spline hub to a left driving output shaft;
the power transmitted to the right driving gear drives the right crawler belt from an input gear, a gear ring frame, a right gear ring, a right planetary gear carrier, a right driving gear, a right idle gear, a right reverse gear input gear, a right reverse gear output gear, a right driving reverse gear output gear, a right combination sleeve and a right spline hub to a right driving output shaft;
because the rotating speed of the left sun wheel is the same as that of the right sun wheel and the direction is opposite, the forces acting on the steering shaft through the left planetary gear and the right planetary gear are the same in magnitude and opposite in direction, the steering shaft is self-locked, and the tracked vehicle moves in a backward straight line;
4) the reversing shifting fork is arranged on a backward gear by shifting towards the right side to drive the left shifting fork shaft and the right shifting fork shaft to move right;
the left shifting fork shaft moves rightwards to drive the left shifting fork to move rightwards, and then the left combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right shifting fork shaft moves rightwards to drive the right shifting fork to move rightwards, so as to drive the right combination sleeve to move rightwards to be combined with the right driving reverse gear output gear;
when steering is needed, the HST output shaft rotates under the action of hydraulic pressure, the HST output shaft drives all gears mounted on the steering shaft to rotate, the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased respectively after power is converged through double-flow driving, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased respectively, so that the rotating speed difference of the left crawler belt and the right crawler belt occurs, and the crawler belt vehicle runs in a reverse steering mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811036329.8A CN108825740B (en) | 2018-09-06 | 2018-09-06 | Rear reverse gear tracked vehicle transmission |
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| CN201811036329.8A CN108825740B (en) | 2018-09-06 | 2018-09-06 | Rear reverse gear tracked vehicle transmission |
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| CN108825740A CN108825740A (en) | 2018-11-16 |
| CN108825740B true CN108825740B (en) | 2021-04-09 |
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| CN111271427B (en) * | 2020-04-01 | 2023-08-01 | 浙江四方集团有限公司 | Integrated double HST planetary differential steering gearbox |
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| CN208793533U (en) * | 2018-09-06 | 2019-04-26 | 湖南农业大学 | A kind of endless-track vehicle speed changer of power double fluid input |
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| US6601474B2 (en) * | 2000-09-05 | 2003-08-05 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Hydrostatic transmission and power train for vehicle |
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| JPH07223450A (en) * | 1994-02-14 | 1995-08-22 | Honda Motor Co Ltd | Transmission |
| KR20150026476A (en) * | 2013-09-03 | 2015-03-11 | 엘에스엠트론 주식회사 | Continuously variable transmission |
| CN105114606A (en) * | 2015-09-16 | 2015-12-02 | 湖南省农友机械集团有限公司 | Dual-power input type three-gear tracked vehicle transmission |
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| CN108825740A (en) | 2018-11-16 |
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