CN109139851B - Double-flow steering variable-speed transmission device of tracked vehicle - Google Patents

Double-flow steering variable-speed transmission device of tracked vehicle Download PDF

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Publication number
CN109139851B
CN109139851B CN201811036198.3A CN201811036198A CN109139851B CN 109139851 B CN109139851 B CN 109139851B CN 201811036198 A CN201811036198 A CN 201811036198A CN 109139851 B CN109139851 B CN 109139851B
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China
Prior art keywords
gear
driving
shaft
steering
shifting fork
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CN201811036198.3A
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Chinese (zh)
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CN109139851A (en
Inventor
孙松林
肖名涛
夏慧
陈斌
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Hunan Agricultural University
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Hunan Agricultural University
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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
    • F16H37/0806—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 with a plurality of driving or driven shafts
    • F16H37/0813—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 with a plurality of driving or driven shafts with only one input shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/10—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
    • B62D11/14—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
    • B62D11/18—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
    • F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
    • F16H3/32—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial and an additional shaft
    • 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
    • F16H37/04—Combinations of toothed gearings only
    • F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
    • F16H37/043—Combinations of toothed gearings only change gear transmissions in group arrangement without gears having orbital motion
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means

Abstract

A double-flow steering tracked vehicle variable-speed transmission device comprises a variable-speed transmission assembly, a differential steering assembly, a double-flow driving assembly, a left driving assembly, a reversing operation assembly and a right driving assembly which are arranged in a box body assembly, wherein the variable-speed transmission assembly is connected with the differential steering assembly, the differential steering assembly is connected with the double-flow driving assembly, the double-flow driving assembly is connected with the left driving assembly and the right driving assembly, the left driving assembly and the right driving assembly are connected with the reversing operation assembly, and power double-flow input is formed by adopting HST (high speed steering) stepless steering and mechanical multi-gear driving so as to realize differential steering on two sides of a track, the steering radius can be continuously changed, and the steering accuracy is high; differential power steering input under the coaxial condition ensures that the left and right steering input power has the same rotating speed and opposite steering, and has compact structure and reliable work; and the left and right shifting fork shafts of the reversing operation assembly are symmetrically arranged around the supporting seat, so that the operation switching of advancing and retreating one rod is realized, and the operation is simple and convenient.

Description

Double-flow steering variable-speed transmission device of tracked vehicle
Technical Field
The invention relates to the technical field of variable-speed transmission, in particular to a double-flow steering variable-speed transmission device for a tracked vehicle.
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 includes electric transmission, hydraulic transmission, mechanical transmission and other modes, and the mechanical transmission has high efficiency and wide application. In the double-flow transmission scheme, 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 is moved forwards and backwards), taking the left operation steering mechanism as an example, when the steering mechanism is operated leftwards, after power confluence, the left track is decelerated, the right track is accelerated, the crawler vehicle is steered leftwards, when the steering mechanism is operated leftwards, the steering mechanism is also operated leftwards, because the speed change input power is reversed when the crawler vehicle is reversed, the direction of the steering input power is unchanged, although the crawler vehicle is driven backwards, the change rule of the left track and the right track is unchanged because the deflection direction of the steering mechanism: 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 for reversing, the right crawler belt decelerates for reversing), and the crawler vehicle drives towards the right for reversing; when the steering mechanism deflects to the left side, the steering mechanism turns to the left when moving forwards and turns to the right when moving backwards, thereby causing difficult operation and even safety accidents.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a variable speed transmission for a two-flow steered tracked vehicle, which solves 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 tracked vehicle variable speed transmission that double current turned to, is including installing the variable speed drive subassembly in the box subassembly, the differential turns to the subassembly, double current drive assembly, left drive assembly, switching-over operation subassembly and right drive assembly, wherein, the variable speed drive subassembly turns to the subassembly with the differential and is connected, the differential turns to the subassembly and is connected with double current drive assembly, double current drive assembly and left drive assembly, right drive assembly are connected, left drive assembly, right drive assembly are connected with switching-over operation subassembly, concrete structure is as follows:
the box body component comprises a main box body, a right auxiliary box body and a left 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, a driving bevel gear is arranged at one end of the steering shaft, and a right steering 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, one end of the connecting shaft is provided with a driven bevel gear meshed with the driving bevel gear, and the other end of the connecting shaft is provided with a left steering gear; 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-flow driving assembly, a driving input shaft is arranged on a right auxiliary box body and a left auxiliary box body, a left driving gear and a right driving gear are arranged on a driving input shaft extending out of a main box body, an input gear which is normally meshed with a three-gear driven gear is arranged in the middle of the driving input shaft, a left sun gear is arranged on or directly processed on the driving input shaft positioned on one side of the input gear, a right sun gear is arranged on or directly processed on the driving input shaft positioned on the other side of the input gear, a left driving gear is arranged on a left planetary gear carrier, a plurality of left planetary gears are uniformly distributed around the left sun gear through the left planetary gear carrier, a left gear carrier is arranged on the input gear and the left planetary gear carrier, a left gear ring is arranged on the inner side of the left gear carrier, and a left steering driven gear which is normally meshed with a; the right driving gear is arranged on a right planet gear carrier, a plurality of right planet gears are uniformly distributed around the right sun gear through the right planet gear carrier, a right ring gear is arranged on the input gear and the right planet gear carrier, a right gear ring is arranged on the inner side of the right ring gear, and a right steering driven gear which is normally meshed with the right steering gear is arranged on the outer side of the right ring gear;
in the left driving assembly, a left idle wheel is sleeved on a left idle wheel shaft in an empty mode, one end of the left idle wheel shaft is installed on the left auxiliary box body, and the other end of the left idle wheel shaft is installed on the main box body; the left reverse gear input gear and the left reverse gear output gear are arranged on a left reverse gear shaft, one end of the left reverse gear shaft is arranged on the left auxiliary box body, and the other end of the left reverse gear shaft is arranged on the main box body; one end of the left driving output shaft is arranged on the left auxiliary box body, and the other end of the left driving output shaft is arranged on the main box body; meanwhile, a left driving output gear, a left driving reverse gear output gear and a left driving spline hub are mounted on the left driving output shaft, a left driving combination sleeve into which a left driving shifting fork is inserted is arranged on the left driving spline hub, the left driving spline hub and the left driving combination sleeve are in matched transmission through internal and external splines, a shifting groove is circumferentially arranged outside the left driving combination sleeve, and the left driving shifting fork is inserted into the shifting groove of the left driving combination sleeve to limit the axial position of the left driving combination sleeve; the left idle wheel is normally meshed with the left driving gear, the left reverse gear input gear and the left driving output gear simultaneously;
in the right driving assembly, a right idler wheel is sleeved on a right idler wheel shaft in an empty way, one end of the right idler wheel shaft is arranged on the right auxiliary box body, and the other end of the right idler wheel shaft is arranged on the main box body; the right reverse gear output gear and the right reverse gear input gear are arranged on a right reverse gear shaft, one end of the right reverse gear shaft is arranged on the right auxiliary box body, and the other end of the right reverse gear shaft is arranged on the main box body; one end of a right driving output shaft is arranged on the right auxiliary box body, and the other end of the right driving output shaft is arranged on the main box body; meanwhile, a right driving reverse gear output gear, a right driving output gear and a right driving spline hub are mounted on the right driving output shaft, a right driving combination sleeve into which a right driving shifting fork is inserted is arranged on the right driving spline hub, the right driving spline hub and the right driving combination sleeve are in matched transmission through internal and external splines, a shifting groove is circumferentially arranged outside the right driving combination sleeve, and the right driving shifting fork is inserted into the shifting groove of the right driving combination sleeve to limit the axial position of the right driving combination sleeve; the right idler wheel is normally meshed with the right driving gear, the right reverse gear output gear and the driving output gear simultaneously;
in the reversing assembly, a left driving shifting fork is arranged on a left driving shifting fork shaft, a right driving shifting fork is arranged on a right driving shifting fork shaft, one ends of the left driving shifting fork shaft and the right driving shifting fork shaft are arranged on a main box body, the other ends of the left driving shifting fork shaft and the right driving shifting fork shaft are arranged on a left auxiliary box body, the left driving shifting fork shaft and the right driving shifting fork shaft are connected through a reversing rod, and the reversing rod is arranged on the left auxiliary box body.
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, an input gear normally engaged with a three-speed driven gear is installed in the middle of a drive input shaft through internal gear engagement.
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 present invention, the left drive spline 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 drive 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 left driving shifting fork shaft and the right driving shifting fork shaft are arranged on the left auxiliary box body through the self-locking mechanism.
In the invention, the reversing rod is arranged on the left auxiliary box body through the supporting seat.
In the present invention, forward straight running
The reversing rod is shifted to the inner side of the box body and is arranged in a forward gear so as to drive the left driving shifting fork shaft to move left and the right driving shifting fork shaft to move right;
the left driving shifting fork shaft moves left to drive the left driving shifting fork to move left, and then the left driving combination sleeve is driven to move left to be combined with the left driving output gear;
the right driving shifting fork shaft moves rightwards to drive the right driving shifting fork to move rightwards, and further drive the right driving combination sleeve to move rightwards to be combined with the right driving output gear;
the HST output shaft does not rotate, all gears arranged on the steering shaft do not rotate, the left steering gear is meshed with the left steering driven gear, the right steering gear is meshed with the right steering driven gear, so that the left steering driven gear and the right steering driven gear do not rotate, and the left gear ring and the right gear ring do not rotate; the power is transmitted to the input gear through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to the left driving component, and the other path is transmitted to the right driving component;
the power of the left driving assembly is transmitted to a left driving output shaft from a left sun gear to a left planetary gear through a left planetary gear carrier, a left driving gear, a left idle gear, a left driving output gear, a left driving combination sleeve and a left driving spline hub to drive a left crawler;
the power of the right driving component is transmitted to a right driving output shaft from a right sun gear to a right planetary gear through a right planetary gear carrier, a right driving gear, a right idle gear, a right driving output gear, a right driving combination sleeve and a right driving spline hub to drive a right crawler;
because the left steering gear and the right steering gear have the same rotating speed and opposite directions, the forces acting on the steering shaft through the left steering gear and the right steering gear have the same magnitude and opposite directions, the steering shaft is self-locked, and the tracked vehicle moves forwards and linearly;
forward steering driving
The reversing rod is shifted to the inner side of the box body and is arranged in a forward gear to drive the left driving shifting fork shaft to move left and the right driving shifting fork shaft to move right;
the left driving shifting fork shaft moves left to drive the left driving shifting fork to move left, and then the left driving combination sleeve is driven to move left to be combined with the left driving output gear;
the right driving shifting fork shaft moves rightwards to drive the right driving shifting fork to move rightwards, and further drive the right driving combination sleeve to move rightwards to be combined with the right driving 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 steering gear and the right steering gear are the same, and the directions are opposite; after the power is converged by double flows, the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased one by one, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased one by one, so that the rotating speed difference is generated between the left crawler and the right crawler, and the crawler moves forwards and turns to run;
backward straight running
The reversing rod is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft to move right and the right driving shifting fork shaft to move left;
the left driving shifting fork shaft moves rightwards to drive the left driving shifting fork to move rightwards, and then the left driving combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right driving shifting fork shaft moves leftwards to drive the right driving shifting fork to move leftwards, and further drive the right driving combination sleeve to move leftwards to be combined with the right driving reverse gear output gear;
the HST output shaft does not rotate, all gears arranged on the steering shaft do not rotate, the left steering gear is meshed with the left steering driven gear, the right steering gear is meshed with the right steering driven gear, so that the left steering driven gear and the right steering driven gear do not rotate, and the left gear ring and the right gear ring do not rotate; the power is transmitted to the input gear through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to the left driving component, and the other path is transmitted to the right driving component;
the power of the left driving assembly is transmitted to a left driving output shaft from a left sun gear to a left planetary gear through 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 combination sleeve and a left driving spline hub to drive a left crawler;
the power of the right driving assembly is transmitted to a right driving output shaft from a right sun gear to a right planetary gear through 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 combination sleeve and a right driving spline hub to drive a right crawler;
because the left steering gear and the right steering gear have the same rotating speed and opposite directions, the forces acting on the steering shaft through the left steering gear and the right steering gear have the same magnitude and opposite directions, the steering shaft is self-locked, and the tracked vehicle moves in a backward straight line;
backward steering driving
The reversing rod is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft to move right and the right driving shifting fork shaft to move left;
the left driving shifting fork shaft moves rightwards to drive the left driving shifting fork to move rightwards, and then the left driving combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right driving shifting fork shaft moves leftwards to drive the right driving shifting fork to move leftwards, and further drive the right driving combination sleeve to move leftwards 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 steering gear and the right steering gear are the same, and the directions are opposite, because the left steering gear is meshed with the left steering driven gear, the right steering gear is meshed with the right steering driven gear, the rotating speeds of the left steering driven gear and the right steering driven gear are the same, and the directions are opposite, the rotating speeds of the left gear ring and the right gear ring are the same, and the directions are opposite, after power is converged by double flows, the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased, the rotating speeds of the left driving output shaft and the right driving output shaft are decreased, finally, the rotating speeds of the left crawler belt and the right crawler belt are increased, the rotating speeds of the left crawler belt and the right crawler belt are.
Has the advantages that:
1) according to the invention, the power double-flow input is formed by HST stepless steering and mechanical multi-gear driving, so that differential steering on two sides of the crawler belt is realized, the steering radius can be continuously changed, and the steering accuracy is high;
2) the invention adopts differential steering power input, realizes the same rotating speed and opposite steering of left and right steering input power under the coaxial condition, and has compact structure and reliable work;
3) the left shifting fork shaft and the right shifting fork shaft are symmetrically arranged around the supporting seat, so that the operation switching of forward and backward one-rod operation is realized, and the operation is simple and convenient;
4) the reversing operation assembly is arranged at the rear end of the double-current output, so that the motion law of the steering system is ensured to be unchanged under the same steering condition, and reversing variable-speed transmission is realized.
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 left driving assembly in a preferred embodiment of the invention.
FIG. 6 is a schematic structural diagram of a right driving assembly in a preferred embodiment of the invention.
Fig. 7 is a schematic structural diagram of a reversing operation assembly in a preferred embodiment of the invention.
Fig. 8 is a schematic structural view of a self-locking mechanism in a 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 8, the dual-flow steering tracked vehicle variable speed transmission device comprises a variable speed transmission assembly P1, a differential steering assembly P2, a dual-flow driving assembly P3, a left driving assembly P4, a reversing operation assembly P5 and a right driving assembly P6 which are arranged in a box assembly B, wherein the variable speed transmission assembly P1 is connected with the differential steering assembly P2, the differential steering assembly P2 is connected with the dual-flow driving assembly P3, the dual-flow driving assembly P3 is connected with the left driving assembly P4 and the right driving assembly P6, and the left driving assembly P4 and the right driving assembly P6 are connected with the reversing operation assembly P5, and the specific structure is as follows:
the box body assembly B comprises a main box body B1, a right auxiliary box body B2 and a left auxiliary box body B3;
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 steering gear G33, a right steering gear G33, a steering driven gear G33, a planetary gear shaft P33, a connecting shaft P33, a thrust bearing X33, a needle bearing X33, a porous end cover X33, a non-porous end cover X33, a fastening screw X33, a sealing gasket X33 and a snap ring X33, wherein one end of the steering shaft S33 is mounted on the non-porous end cover X33 through the thrust bearing X33, the non-porous end cover X33 is mounted on a main box B33 through the fastening screw X33, the driving bevel gear G33 is arranged at the end, the other end of the steering shaft S33 is mounted on the main box B33 through the thrust bearing X33, and the right steering driven gear G33 and the steering driven gear G33; a connecting shaft P22 is arranged on a steering shaft S3 through a needle bearing X24 and a thrust bearing X23, a driven bevel gear G33 meshed with a driving bevel gear G31 is arranged at one end of the connecting shaft P22, and a left steering gear G34 is arranged at the other end of the connecting shaft P22; 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 G36 is arranged on the HST output shaft S13 through a spline and a snap ring X8;
the HST input shaft S12 is connected with a shaft S11, the HST output shaft S13 drives a steering driving gear G25, further drives a steering driven gear G36, the steering driven gear G36 drives a steering shaft S3, further drives a right steering gear G35 and a driving bevel gear G31, and due to the fact that the right steering gear G35 is constantly meshed with the right steering driven gear G432, the right steering gear G35 rotates to drive the right steering driven gear G432 to rotate, and therefore the right ring carrier 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 steering gear G34, 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 steering gear G34 and the rotating speed of the right steering gear G35 have the same rotating speed and opposite directions;
since the left steering gear G34 is constantly meshed with the left steering driven gear G431, the left steering gear G34 rotates to drive the left steering driven gear G431 to rotate, so that the left ring gear P32 rotates;
because the rotating speed of the left steering gear G34 is the same as the rotating speed of the right steering gear G35, and the direction is opposite, the rotating speed of the left gear ring frame P32 is the same as the rotating speed 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 G411 and the right driving gear G412, and differential steering is realized;
the dual-flow driving assembly P3 includes a driving input shaft S4, an input gear G46, a left driving gear G411, a right driving gear G412, a left planetary gear G421, a right planetary gear G422, a left steering driven gear G431, a right steering driven gear G432, a left sun gear G441, a right sun gear G442, a left ring gear G451, a right ring gear G452, a left planetary carrier P31, a left ring gear carrier P32, a right planetary carrier P33, a right ring gear carrier P34, a deep groove ball bearing X21, a flange bearing X22, a needle bearing X24, a non-porous end cap X32, a fastening screw X4, a sealing pad X5 and a snap ring X8, the driving input shaft S4 is mounted on the non-porous end cap X32 through the deep groove ball bearing X21, the non-porous end cap X32 is mounted on a right sub-housing B4 and a left sub-housing B4 through the fastening screw X sealing pad, the non-porous sealing pad 4, the driving shaft S4 is mounted on the driving gear G4, the driving gear G is mounted on the left sub-housing B4, the driving gear G and the driving gear G72, the driving gear G is mounted on the driving gear G72, and the A left sun gear G441 mounted or directly machined on a drive input shaft S4 on one side of an input gear G46, a right sun gear G442 mounted or directly machined on a drive input shaft S4 on the other side of the input gear G46, a left drive gear G411 mounted on a left carrier P31 through splines or snap rings X8, left planetary gears G421 evenly distributed around the left sun gear G441 through a left carrier P31, the number of the left planetary gears G421 being n (n being any one of 2, 3, 4), a left carrier P32 mounted on the input gear G46 and the left carrier P31 through a deep groove X21, a left ring gear G451 provided on the inner side of the left carrier P32, and a left steering driven gear G431 provided on the outer side of the left carrier P32 and constantly meshed with the left steering gear G34; the right driving gear G412 is mounted on a right planet carrier P33 through a spline and a snap ring X8, right planet gears G422 are uniformly distributed around a right sun gear G442 through a right planet carrier P33, the number of the right planet gears G422 is n (n is any one of 2, 3 and 4), a right ring carrier P34 is mounted on an input gear G46 and a right planet carrier P33 through a deep groove ball bearing X21, a right ring gear G452 is arranged on the inner side of the right ring carrier P34, and a right steering driven gear G432 which is normally meshed with a right steering gear G35 is arranged on the outer side of the right ring carrier P34;
the left driving assembly P4 comprises a driving input shaft S4, a left driving gear G411, a left idler shaft S51, a left idler gear G51, a left reverse gear shaft S61, a left reverse gear input gear G61, a left reverse gear output gear G62, a left driving output shaft S71, a left driving output gear G71, a left driving reverse gear output gear G72, a left driving spline hub H13, a left driving combination sleeve H23, a left driving shift fork H33, an oil seal X1, a deep groove ball bearing X21, a flange bearing X22, a perforated end cover X31, a non-perforated end cover X32, a fastening screw X4, a sealing gasket X5, a retainer ring X6, a shaft sleeve X7 and a snap ring X8, the left idler wheel G51 is sleeved on a left idler wheel shaft S51 in an empty mode through a shaft sleeve X7, one end of the left idler wheel shaft S51 is mounted on a non-porous end cover X32 through a deep groove ball bearing X21, a non-porous end cover X32 is mounted on a left auxiliary box body B3 through a fastening screw X4 and a sealing gasket X5, and the other end of the left idler wheel shaft S51 is mounted on a main box body B1 through a deep groove ball bearing X21 and a clamping ring X8; the left reverse gear input gear G61 and the left reverse gear output gear G62 are mounted on a left drive reversing shaft S61 through a shaft sleeve X7, one end of the left reverse gear shaft S61 is mounted on a non-porous end cover X32 through a deep groove ball bearing X21, the non-porous end cover X32 is mounted on a left auxiliary box body B3 through a fastening screw X4 and a sealing gasket X5, and the other end of the left reverse gear shaft S61 is mounted on a main box body B1 through a flange bearing X22; one end of a left driving output shaft S71 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 left auxiliary box B3 through a fastening screw X4 and a sealing gasket X5, and the other end of the left driving output shaft S71 is installed on a main box B1 through a flange bearing X22; meanwhile, a left driving output gear G71 and a left driving reverse gear output gear G72 are mounted on a left driving output shaft S71 in an empty sleeve mode through a shaft sleeve X6, a left driving spline hub H13 is mounted on a left driving output shaft S71 located between the left driving output gear G71 and the left driving reverse gear output gear G72 in a spline fit mode, a left driving combination sleeve H23 used for inserting a left driving shifting fork H33 is arranged on the left driving spline hub H13, the left driving spline hub H13 and the left driving combination sleeve H23 are in internal and external spline fit transmission, a shifting groove is formed in the outer circumferential direction of the left driving combination sleeve H23, and the left driving shifting fork H33 is inserted into the shifting groove of the left driving combination sleeve H23 to limit the axial position of the left driving combination sleeve H23; the left idler gear G51 is in constant mesh with the left drive gear G411, the left reverse input gear G61 and the left drive output gear G71, and the left drive reverse output gear G72 is in constant mesh with the left reverse output gear G62;
the right driving assembly P6 comprises a driving input shaft S4, a right driving gear G412, a right idler shaft S52, a right idler gear G52, a right reverse gear shaft S62, a right reverse gear output gear G63, a right reverse gear input gear G64, a right driving output shaft S72, a right driving reverse gear output gear G73, a right driving output gear G74, a right driving spline hub H14, a right driving combination sleeve H24, a right driving shift fork H34, an oil seal X1, a deep groove ball bearing X21, a flange bearing X22, a perforated end cover X31, a non-perforated end cover X32, a fastening screw X4, a sealing gasket X5, a retainer ring X6, a shaft sleeve X7 and a snap ring X8, the right idler wheel G52 is sleeved on a right idler wheel shaft S52 in an empty mode through a shaft sleeve X7, one end of the right idler wheel shaft S52 is mounted on a non-porous end cover X32 through a deep groove ball bearing X21, the non-porous end cover X32 is mounted on a right auxiliary box body B2 through a fastening screw X4 and a sealing gasket X5, and the other end of the right idler wheel shaft S52 is mounted on a main box body B1 through a deep groove ball bearing X21 clamping ring X8; the right reverse gear output gear G63 and the right reverse gear input gear G64 are mounted on a right reverse gear shaft S62 through a shaft sleeve X7, one end of the right reverse gear shaft S62 is mounted on a non-porous end cover X32 through a deep groove ball bearing X21, the non-porous end cover X32 is mounted on a right auxiliary box body B2 through a fastening screw X4 and a sealing gasket X5, and the other end of the right reverse gear shaft S62 is mounted on a main box body B1 through a flange bearing X22; one end of a right driving output shaft S72 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 right auxiliary box B2 through a fastening screw X4 and a sealing gasket X5, and the other end of the right driving output shaft S72 is installed on a main box B1 through a flange bearing X22; meanwhile, a right driving reverse gear output gear G73 and a right driving output gear G74 are mounted on a right driving output shaft S72 in an empty way through a shaft sleeve X6, a right driving spline hub H14 is mounted on a right driving output shaft S72 located between the right driving reverse gear output gear G73 and the right driving output gear G74 in a spline fit mode, a right driving combination sleeve H24 used for inserting a right driving shifting fork H34 is arranged on the right driving spline hub H14, the right driving spline hub H14 and the right driving combination sleeve H24 are in internal and external spline fit transmission, a shifting groove is formed in the outer circumferential direction of the right driving combination sleeve H24, and the right driving shifting fork H34 is inserted into the shifting groove of the right driving combination sleeve H24 to limit the axial position of the right driving combination sleeve H24; the right idler gear G52 is in constant mesh with the right drive driving gear G412, the right reverse input gear G64 and the right drive output gear G74, and the right drive reverse output gear G73 is in constant mesh with the right reverse output gear G63;
the reversing assembly P5 comprises a left driving spline hub H13, a right driving spline hub H14, a left driving combination sleeve H23, a right driving combination sleeve H24, a left driving shifting fork H33, a right driving shifting fork H34, a left driving shifting fork H41, a support seat H42, a reversing rod H43, a right driving shifting fork H44, a self-locking mechanism Z and a sealing ring X9, wherein the left driving shifting fork H33 is installed on the left driving shifting fork H41, the right driving shifting fork H34 is installed on the right driving shifting fork H44, the left driving shifting fork H41 and the right driving shifting fork H44 are installed on a main box B1 and a left auxiliary box B3 through the self-locking mechanism Z and the sealing ring X9, the left driving shifting fork H41 and the right driving shifting fork H44 are connected through the reversing rod H43, and the reversing rod H43 is installed on a left auxiliary box B3 through the support seat H42.
The self-locking mechanism Z comprises a self-locking bolt Z1, a self-locking force adjusting bolt Z2, a self-locking spring Z3, a self-locking steel ball Z4 and a self-locking seat Z5, the self-locking seat Z5 is installed on a box body B1 through the self-locking bolt Z1, the self-locking force adjusting bolt Z2, the self-locking spring Z3 and the self-locking steel ball Z4 are installed on the self-locking seat Z5, the self-locking force adjusting bolt Z2 is rotated to adjust self-locking pressure, when the left driving shifting fork shaft H41 and the right driving shifting fork shaft H44 are in neutral gear, forward gear and reverse gear, the self-locking steel ball Z4 falls into annular grooves of the left driving shifting fork shaft H41 and the right driving shifting fork shaft H44 to realize self-locking and prevent automatic gear jumping.
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 rod H43 is shifted towards the inner side of the box body and is placed in a forward gear to drive the left driving shifting fork shaft H41 to move left and the right driving shifting fork shaft H44 to move right;
the left driving shifting fork shaft H41 moves leftwards to drive the left driving shifting fork H33 to move leftwards, and further drive the left driving combination sleeve H23 to move leftwards to be combined with the left driving output gear G71;
the right driving shifting fork shaft H44 moves rightwards to drive the right driving shifting fork H34 to move rightwards, and further drive the right driving combination sleeve H24 to move rightwards to be combined with the right driving output gear G74;
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, while the left steering gear G34 meshes with the left steering driven gear G431, and the right steering gear G35 meshes with the right steering driven gear G432, so that the left steering driven gear G431 and the right steering driven gear G432 do not rotate, and the left ring gear G451 and the right ring gear G452 do not rotate; the power is transmitted to an input gear G46 through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to a left driving assembly P4, and the other path is transmitted to a right driving assembly P6;
the power of the left driving assembly P4 is transmitted to a left driving output shaft S71 from a left sun gear G441 to a left planetary gear G421 through a left planetary gear carrier P31, a left driving gear G411, a left idle gear G51, a left driving output gear G71, a left driving combination sleeve H23 and a left driving spline hub H13 to drive a left crawler;
the power of the right driving assembly P6 is transmitted from the right sun gear G442 to the right planetary gear G422 through the right planetary gear carrier P33, the right driving gear G412, the right idle gear G52, the right driving output gear G74, the right driving combination sleeve H24 and the right driving spline hub H14 to the right driving output shaft S72 to drive the right crawler;
because the left steering gear G34 and the right steering gear G35 have the same rotating speed and opposite directions, the forces acting on the steering shaft S3 through the left steering gear G34 and the right steering gear G35 have the same magnitude and opposite directions, the steering shaft S3 is self-locked, and the tracked vehicle runs forwards and linearly;
3) forward steering driving
The reversing rod H43 is shifted towards the inner side of the box body and is placed in a forward gear to drive the left driving shifting fork shaft H41 to move left and the right driving shifting fork shaft H44 to move right;
the left driving shifting fork shaft H41 moves leftwards to drive the left driving shifting fork H33 to move leftwards, and further drive the left driving combination sleeve H23 to move leftwards to be combined with the left driving output gear G71;
the right driving shifting fork shaft H44 moves rightwards to drive the right driving shifting fork H34 to move rightwards, and further drive the right driving combination sleeve H24 to move rightwards to be combined with the right driving output gear G74;
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 steering gear G34 is the same as that of the right steering gear G35, and the rotating speed is opposite to that of the right steering gear G35, the left steering gear G34 is meshed with the left steering driven gear G431, the right steering gear G35 is meshed with the right steering driven gear G432, the rotating speed of the left steering driven gear G431 is the same as that of the right steering driven gear G432, and the rotating speed is opposite to that of the left gear ring G451 and the right gear ring G452; after the power is converged by two flows, the rotating speeds of the left planetary gear carrier P31 and the right planetary gear carrier P33 are increased and decreased, and finally the rotating speeds transmitted to the left driving output shaft S71 and the right driving output shaft S72 are increased and decreased, so that the rotating speed difference occurs between the left crawler belt and the right crawler belt, and the crawler vehicle runs in a forward steering mode;
4) backward straight running
The reversing rod H43 is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft H41 to move right and the right driving shifting fork shaft H44 to move left;
the left driving shifting fork shaft H41 moves rightwards to drive the left driving shifting fork H33 to move rightwards, and further drive the left driving combination sleeve H23 to move rightwards to be combined with the left driving reverse gear output gear G72;
the right driving shifting fork shaft H44 moves leftwards to drive the right driving shifting fork H34 to move leftwards, and further drive the right driving combination sleeve H24 to move leftwards to be combined with the right driving reverse gear 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, while the left steering gear G34 meshes with the left steering driven gear G431, and the right steering gear G35 meshes with the right steering driven gear G432, so that the left steering driven gear G431 and the right steering driven gear G432 do not rotate, and the left ring gear G451 and the right ring gear G452 do not rotate; the power is transmitted to an input gear G46 through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to a left driving assembly P4, and the other path is transmitted to a right driving assembly P6;
the power of the left driving assembly P4 is transmitted to the left driving output shaft S71 from the left sun gear G441 to the left planetary gear G421 through the left planetary gear carrier P31, the left driving gear G411, the left idle gear G51, the left reverse gear input gear G61, the left reverse gear output gear G62, the left driving reverse gear output gear G72, the left driving coupling sleeve H23 and the left driving spline hub H13 to drive the left crawler;
the power of the right driving assembly P6 is transmitted to the right driving output shaft S72 from the right sun gear G442 to the right planetary gear G422 through the right planetary gear carrier P33, the right driving gear G412, the right idle gear G52, the right reverse gear input gear G64, the right reverse gear output gear G63, the right driving reverse gear output gear G73, the right driving combination sleeve H24 and the right driving spline hub H14 to drive the right crawler;
because the left steering gear G34 and the right steering gear G35 have the same rotating speed and opposite directions, the forces acting on the steering shaft S3 through the left steering gear G34 and the right steering gear G35 have the same magnitude and opposite directions, the steering shaft S3 is self-locked, and the tracked vehicle moves in a backward straight line;
5) backward steering driving
The reversing rod H43 is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft H41 to move right and the right driving shifting fork shaft H44 to move left;
the left driving shifting fork shaft H41 moves rightwards to drive the left driving shifting fork H33 to move rightwards, and further drive the left driving combination sleeve H23 to move rightwards to be combined with the left driving reverse gear output gear G72;
the right driving shifting fork shaft H44 moves leftwards to drive the right driving shifting fork H34 to move leftwards, and further drive the right driving combination sleeve H24 to move leftwards to be combined with the right driving reverse gear output gear G73;
when steering is required, the HST output shaft S13 is rotated hydraulically, the HST output shaft S13 drives all gears mounted on the steering shaft S3 to rotate, and the left steering gear G34 rotates at the same speed and in the opposite direction as the right steering gear G35, since the left steering gear G34 is engaged with the left steering driven gear G431, the right steering gear G35 is engaged with the right steering driven gear G432, and the left steering driven gear G431 and the right steering driven gear G432 have the same rotating speed and opposite directions, so that the left gear ring G451 and the right gear ring G452 have the same rotating speed and opposite directions, power is subjected to double-flow combination, the rotating speeds of the left planetary gear carrier P31 and the right planetary gear carrier P33 are increased and decreased, finally, the rotating speeds transmitted to the left driving output shaft S71 and the right driving output shaft S72 are increased and decreased, so that the rotating speed difference between the left side crawler belt and the right side crawler belt occurs, and the crawler belt 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 (5)

1. The utility model provides a tracked vehicle variable speed transmission that double current turned to, including installing the variable speed drive subassembly in the box subassembly, the differential turns to the subassembly, double current drive assembly, left drive assembly, switching-over operation subassembly and right drive assembly, a serial communication port, the variable speed drive subassembly turns to the subassembly with the differential and is connected, the differential turns to the subassembly and is connected with double current drive assembly, double current drive assembly and left drive assembly, right drive assembly are connected, left drive assembly, right drive assembly are connected with switching-over operation subassembly, concrete structure is as follows:
the box body component comprises a main box body, a right auxiliary box body and a left auxiliary box body;
in the variable-speed transmission assembly, a first shaft and a second shaft are installed 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 installed on the first shaft in a free sleeve mode, a second-gear spline hub and a third-fourth-gear spline hub are installed on the first shaft between the first-gear driving gear and the second-gear driving gear, a second-gear combination sleeve used for inserting a second-gear shifting fork is arranged on the second-gear spline hub, the third-fourth-gear spline hub is installed on the first shaft between the third-gear driving gear and the fourth-gear driving gear, a third-fourth-gear combination sleeve used for inserting a third-fourth-gear shifting fork is arranged on the third-fourth-gear spline hub in the circumferential direction, a shifting groove used for inserting the second-gear shifting fork is arranged on the outer circumference of the second; 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, a driving bevel gear is arranged at one end of the steering shaft, and a right steering 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, one end of the connecting shaft is provided with a driven bevel gear meshed with the driving bevel gear, and the other end of the connecting shaft is provided with a left steering gear; 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-flow driving assembly, a driving input shaft is arranged on a right auxiliary box body and a left auxiliary box body, a left driving gear and a right driving gear are arranged on the driving input shaft extending out of a main box body, and an input gear normally meshed with a three-gear driven gear is arranged in the middle of the driving input shaft through internal gear meshing; the left sun gear is mounted or directly processed on a drive input shaft positioned on one side of the input gear, the right sun gear is mounted or directly processed on the drive input shaft positioned on the other side of the input gear, the left drive driving gear is mounted on a left planetary gear carrier, a plurality of left planetary gears are uniformly distributed around the left sun gear through the left planetary gear carrier, a left gear ring carrier is mounted on the input gear and the left planetary gear carrier, a left gear ring is arranged on the inner side of the left gear ring carrier, and a left steering driven gear which is normally meshed with the left steering gear is arranged on the outer side of the left gear ring carrier; the right driving gear is arranged on a right planet gear carrier, a plurality of right planet gears are uniformly distributed around the right sun gear through the right planet gear carrier, a right ring gear is arranged on the input gear and the right planet gear carrier, a right gear ring is arranged on the inner side of the right ring gear, and a right steering driven gear which is normally meshed with the right steering gear is arranged on the outer side of the right ring gear;
in the left driving assembly, a left idle wheel is sleeved on a left idle wheel shaft in an empty mode, one end of the left idle wheel shaft is installed on the left auxiliary box body, and the other end of the left idle wheel shaft is installed on the main box body; the left reverse gear input gear and the left reverse gear output gear are arranged on a left reverse gear shaft, one end of the left reverse gear shaft is arranged on the left auxiliary box body, and the other end of the left reverse gear shaft is arranged on the main box body; one end of the left driving output shaft is arranged on the left auxiliary box body, and the other end of the left driving output shaft is arranged on the main box body; meanwhile, a left driving output gear, a left driving reverse gear output gear and a left driving spline hub are mounted on the left driving output shaft, the left driving spline hub is mounted on the left driving output shaft between the left driving output gear and the left driving reverse gear output gear, a left driving combination sleeve for inserting a left driving shifting fork is arranged on the left driving spline hub, and a shifting groove for inserting the left driving shifting fork is circumferentially arranged outside the left driving combination sleeve; the left idle wheel is normally meshed with the left driving gear, the left reverse gear input gear and the left driving output gear simultaneously;
in the right driving assembly, a right idler wheel is sleeved on a right idler wheel shaft in an empty way, one end of the right idler wheel shaft is arranged on the right auxiliary box body, and the other end of the right idler wheel shaft is arranged on the main box body; the right reverse gear output gear and the right reverse gear input gear are arranged on a right reverse gear shaft, one end of the right reverse gear shaft is arranged on the right auxiliary box body, and the other end of the right reverse gear shaft is arranged on the main box body; one end of the right driving output shaft is arranged on the right auxiliary box body, and the other end of the right driving output shaft is arranged on the main box body; meanwhile, a right driving reverse gear output gear, a right driving output gear and a right driving spline hub are mounted on the right driving output shaft, the right driving spline hub is mounted on the right driving output shaft between the right driving output gear and the right driving reverse gear output gear, a right driving combination sleeve for inserting a right driving shifting fork is arranged on the right driving spline hub, and a shifting groove for inserting the right driving shifting fork is circumferentially arranged outside the right driving combination sleeve; the right idler wheel is normally meshed with the right driving gear, the right reverse gear output gear and the driving output gear simultaneously;
in the reversing assembly, a left driving shifting fork is arranged on a left driving shifting fork shaft, a right driving shifting fork is arranged on a right driving shifting fork shaft, one ends of the left driving shifting fork shaft and the right driving shifting fork shaft are arranged on a main box body, the other ends of the left driving shifting fork shaft and the right driving shifting fork shaft are arranged on a left auxiliary box body, the left driving shifting fork shaft and the right driving shifting fork shaft are connected through a reversing rod, and the reversing rod is arranged on the left auxiliary box body.
2. A dual flow steering tracked vehicle variable speed transmission according to claim 1 wherein the number of left planet gears is any one of 2, 3 and 4.
3. A dual flow steering tracked vehicle variable speed transmission according to claim 1, wherein the number of right planet gears is any one of 2, 3 and 4.
4. The dual flow steered tracked vehicle variable speed transmission of claim 1, wherein the left drive fork shaft and the right drive fork shaft are mounted on the left sub-case by a self-locking mechanism.
5. A dual flow steering tracked vehicle variable speed drive according to any one of claims 1 to 4, wherein the tracked vehicle variable speed drive is driven by the steps of:
1) the reversing rod is shifted to the inner side of the box body and is arranged in a forward gear so as to drive the left driving shifting fork shaft to move left and the right driving shifting fork shaft to move right;
the left driving shifting fork shaft moves left to drive the left driving shifting fork to move left, and then the left driving combination sleeve is driven to move left to be combined with the left driving output gear;
the right driving shifting fork shaft moves rightwards to drive the right driving shifting fork to move rightwards, and further drive the right driving combination sleeve to move rightwards to be combined with the right driving output gear;
the HST output shaft does not rotate, all gears arranged on the steering shaft do not rotate, the left steering gear is meshed with the left steering driven gear, the right steering gear is meshed with the right steering driven gear, so that the left steering driven gear and the right steering driven gear do not rotate, and the left gear ring and the right gear ring do not rotate; the power is transmitted to the input gear through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to the left driving component, and the other path is transmitted to the right driving component;
the power of the left driving assembly is transmitted to a left driving output shaft from a left sun gear to a left planetary gear through a left planetary gear carrier, a left driving gear, a left idle gear, a left driving output gear, a left driving combination sleeve and a left driving spline hub to drive a left crawler;
the power of the right driving component is transmitted to a right driving output shaft from a right sun gear to a right planetary gear through a right planetary gear carrier, a right driving gear, a right idle gear, a right driving output gear, a right driving combination sleeve and a right driving spline hub to drive a right crawler;
because the left steering gear and the right steering gear have the same rotating speed and opposite directions, the forces acting on the steering shaft through the left steering gear and the right steering gear have the same magnitude and opposite directions, the steering shaft is self-locked, and the tracked vehicle moves forwards and linearly;
2) the reversing rod is shifted to the inner side of the box body and is arranged in a forward gear to drive the left driving shifting fork shaft to move left and the right driving shifting fork shaft to move right;
the left driving shifting fork shaft moves left to drive the left driving shifting fork to move left, and then the left driving combination sleeve is driven to move left to be combined with the left driving output gear;
the right driving shifting fork shaft moves rightwards to drive the right driving shifting fork to move rightwards, and further drive the right driving combination sleeve to move rightwards to be combined with the right driving 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 steering gear and the right steering gear are the same, and the directions are opposite; after the power is converged by double flows, the rotating speeds of the left planetary gear carrier and the right planetary gear carrier are increased and decreased one by one, and finally the rotating speeds transmitted to the left driving output shaft and the right driving output shaft are increased and decreased one by one, so that the rotating speed difference is generated between the left crawler and the right crawler, and the crawler moves forwards and turns to run;
3) the reversing rod is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft to move right and the right driving shifting fork shaft to move left;
the left driving shifting fork shaft moves rightwards to drive the left driving shifting fork to move rightwards, and then the left driving combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right driving shifting fork shaft moves leftwards to drive the right driving shifting fork to move leftwards, and further drive the right driving combination sleeve to move leftwards to be combined with the right driving reverse gear output gear;
the HST output shaft does not rotate, all gears arranged on the steering shaft do not rotate, the left steering gear is meshed with the left steering driven gear, the right steering gear is meshed with the right steering driven gear, so that the left steering driven gear and the right steering driven gear do not rotate, and the left gear ring and the right gear ring do not rotate; the power is transmitted to the input gear through variable speed transmission, and then is divided into two paths, wherein one path is transmitted to the left driving component, and the other path is transmitted to the right driving component;
the power of the left driving assembly is transmitted to a left driving output shaft from a left sun gear to a left planetary gear through 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 combination sleeve and a left driving spline hub to drive a left crawler;
the power of the right driving assembly is transmitted to a right driving output shaft from a right sun gear to a right planetary gear through 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 combination sleeve and a right driving spline hub to drive a right crawler;
because the left steering gear and the right steering gear have the same rotating speed and opposite directions, the forces acting on the steering shaft through the left steering gear and the right steering gear have the same magnitude and opposite directions, the steering shaft is self-locked, and the tracked vehicle moves in a backward straight line;
4) the reversing rod is shifted to the outer side of the box body and is arranged in a backward gear to drive the left driving shifting fork shaft to move right and the right driving shifting fork shaft to move left;
the left driving shifting fork shaft moves rightwards to drive the left driving shifting fork to move rightwards, and then the left driving combination sleeve is driven to move rightwards to be combined with the left driving reverse gear output gear;
the right driving shifting fork shaft moves leftwards to drive the right driving shifting fork to move leftwards, and further drive the right driving combination sleeve to move leftwards to be combined with the right driving reverse gear 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 steering gear and the right steering gear are the same, and the directions of the left steering gear and the right steering gear are opposite.
CN201811036198.3A 2018-09-06 2018-09-06 Double-flow steering variable-speed transmission device of tracked vehicle Active CN109139851B (en)

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JPH11334643A (en) * 1998-05-26 1999-12-07 Iseki & Co Ltd Differential driving unit in crawler type working vehicle
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CN203413073U (en) * 2013-08-29 2014-01-29 湖南农业大学 Integrated speed-change drive axle
CN104088989B (en) * 2014-07-25 2015-05-20 湖南农业大学 Continuously variable transmission for direct control mode crawler
CN105042049B (en) * 2015-09-16 2016-06-29 湖南农业大学 A kind of endless-track vehicle variator of the built-in brake unit of double dynamical input type
CN106080772B (en) * 2016-06-24 2018-11-20 湖南农业大学 Self-lock differential formula crawler belt driving and steering system
CN106763563B (en) * 2017-02-15 2017-10-10 湖南农业大学 A kind of ratio steering-type speed changer for crawler equipment
CN106741170B (en) * 2017-02-15 2017-10-27 湖南农业大学 A kind of crawler-type harvester speed changer
CN208831631U (en) * 2018-09-06 2019-05-07 湖南农业大学 A kind of variable speed drive for the driving of endless-track vehicle double fluid

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