Automobile stepless mechanical transmission

FIELD: transport engineering.

SUBSTANCE: invention relates to stepless mechanical transmission on base of inertia impulse transmission. Proposed transmission consists of input shaft 1 rigidly connected with housing of impulse mechanism 2 mechanically coupling with intermediate shaft 3 in which two overrunning mechanisms are installed, main mechanism 4 and output mechanism 5. Outer race 6 of main overrunning mechanism is connected with transmission case by means of cam clutch 7. Inner clutch member 8 of one of cam clutches is rigidly connected with housing of impulse mechanism. Clutch member 9 of second clutch is rigidly connected with flywheel 10 of output shaft. Outer race 11 of one of cam clutches is arranged on intermediate shaft between housing of impulse mechanism and main overrunning mechanism. Outer clutch member 12 of second cam clutch is installed on intermediate shaft between flywheel of output shaft and main overrunning mechanism. Outer clutch member 12 is rigidly connected with cam clutch 7 of main overrunning mechanism.

EFFECT: provision of transmission of torque from flywheel of output shaft to input shaft and vice versa.

3 dwg

 

The invention relates to the field of engineering, in particular to mechanical continuously variable transmissions based on inertial impulse transmission, and may find application in transportation, for example in the automotive continuously variable transmissions.

Known continuously variable automotive mechanical transmission based on inertial impulse transmission (see Maltsev SCI Mechanical impulse transmission. M.: Mashinostroenie, 1978). The main purpose of such transmission - automatic change of speed of rotation of the output shaft when the resistance to movement of the vehicle regardless of the speed of rotation of the input shaft.

The scheme of continuous mechanical automotive gearbox (automatic) includes a switching mechanism, an intermediate shaft with two mechanisms of free running (USDA): pressurized and weekends. Outer ring corps USDA rigidly connected to the housing of the kPa. Outer ring of the output of the free-wheeling mechanism is simultaneously the flywheel output shaft.

In mechanical stepless automatic transmission there are three possible operating modes: stop mode, clock mode and live mode. In all three modes, the transmission of torque is in the direction from the input shaft to the flywheel output shaft through the transmission of impulses arising from pulse IU is anima, on the shaft with two MOA, where Cabinet USDA cuts off a negative pulse, and the output of the USDA passes to the output shaft of the positive pulse.

The torque transmission is performed from the input shaft to the flywheel output shaft and later on the leading axle of the vehicle.

In conditions of road transport in boxes speeds in some modes, it is necessary to transfer torque in the opposite direction from the leading axis of the vehicle to the engine, that is, from the output shaft to the input.

In this continuously variable mechanical gearbox rigid connection between the engine and the flywheel output shaft is provided only in the direction from the input shaft to the output. Reverse the direction of torque transmission is not possible, this prevents the output of the USDA engaged in the transmission of torque in one direction only.

The closest in technical essence of the present invention is an inertial mechanical transfer (A.S. No. 153817, UK, 1967), consisting of a pulse mechanism rigidly connected to the engine shaft with two mechanisms of free running and flywheel output shaft.

The disadvantage of this solution is the ability to transmit torque in only one direction from the input shaft to the flywheel output shaft.

The objective of the proposed image the shadow is to eliminate this drawback, i.e. ensuring the transmission of torque from the flywheel output shaft to input and Vice versa.

This object is achieved in that the continuously variable automatic transmission consisting of a pulse mechanism, intermediate shaft, shell and weekends MOA and flywheel output shaft, the intermediate shaft twin Cam clutch installed so that the inner ferrule of one of the coupling is rigidly fixed to the housing of the pulse mechanism, and the inner ferrule of the second clutch - flywheel output shaft, the outer casing of both couplings are installed on the intermediate shaft with the possibility of axial movement, while the outer ring of one of the couplings when connecting with the inner yoke on the output flywheel at the same time separates the outer race corps MOA with the case of the ACP.

This design allows you to simultaneously turn on the Cam coupling, which creates a rigid connection of the flywheel output shaft with the input shaft, which allows for a direct transmission of torque from the input shaft to the flywheel output shaft and Vice versa, as well as the possibility of engine braking and run it through a "roll forward". At the same time the outer ferrule corps USDA disconnected with the case of the ACP, which reduces mechanical losses from the Ministry of agriculture.

Figure 1 shows a continuously variable automatic transmission (General view), figure 2 - stepless gearbox in the gesture of the CSOs connection of the input and output shafts, figure 3 - cross section a-a ACP corps of the Ministry of agriculture.

Continuously variable automatic transmission comprises an input shaft 1 is rigidly connected with the housing of the pulse mechanism 2, kinematically connected with the intermediate shaft 3, which is equipped with two freewheel mechanism - Cabinet 4 and outlet 5. Outer ring 6 corps MOA with the corps ACP connected by means of a clutch 7. With the case of the impulse mechanism is rigidly connected to the inner coupling half 8 one of the Cam couplings, such as coupling the second clutch 9 are rigidly connected to the flywheel 10 of the output shaft. On the intermediate shaft between the housing of the pulse mechanism and housing of the Ministry of agriculture is the outer ferrule 11 one clutch on the intermediate shaft between the flywheel output shaft and housing USDA - outer coupling half 12 of the second clutch. The outer coupling half 12 is rigidly connected with the Cam sleeve 7 corps of the Ministry of agriculture.

The device operates as follows. If you move the clip 11 to the connection with the coupling 8 housing pulse mechanism is rigidly connected with the intermediate shaft 3. If you move the clip 12 to the connection coupling 9 of the flywheel output shaft is rigidly connected intermediate shaft with the flywheel output shaft, and the yoke 12 separates the outer body 6 corps MOA with the case of the ACP.

Stepless mechanism is ical automotive transmission, consisting of a pulse mechanism, intermediate shaft, shell and output mechanisms of free running and flywheel output shaft, characterized in that it is mounted on the intermediate shaft Cam clutch, with the inner ferrule of one of the Cam clutch is rigidly fixed to the housing of the pulse mechanism, and the inner ferrule of the second clutch - flywheel output shaft, the outer shroud both Cam clutches are installed on the splined section of the intermediate shaft with the possibility of axial movement, the outer ferrule structure-borne free-wheeling mechanism connected with the body of an automotive transmission of the third Cam clutch, outer ring of the second clutch is rigidly connected with the third Cam clutch when this outer ring of the body freewheel mechanism kinematically connected with the outer race of the output mechanism of a free turn.



 

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FIELD: mechanical engineering.

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FIELD: mechanical engineering.

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1 dwg

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FIELD: mechanical engineering.

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2 dwg

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3 cl, 6 dwg

FIELD: transport engineering; vehicle transmissions.

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2 dwg

FIELD: transport engineering; vehicle transmissions.

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2 dwg

FIELD: transport engineering; transmissions.

SUBSTANCE: invention can be used in automobiles, tractors, road building machines. Gear 11 of transmission is coupled with primary shaft 2. Additional simple three-members planetary mechanism has two gear rims, gear rim 22 of partition of housing of set 1 and shifter sleeve 23. Main planetary mechanism has gear rims 31, 32 of carrier 25 and housing of epicyclic gear 26 opposite to gear rim of set housing. Gear rims 28, 29, 30 of tubular shaft 27 of housing of epicyclic gear 26, output shaft of carrier 25 and output shaft of set are arranged close to each other. Shifter sleeve D is connected by fork 39 and slider 40 with gear rim 41 with internal and external meshing teeth arranged on gear rim 33 of set housing.

EFFECT: enlarged operating capabilities of vehicle.

2 dwg

FIELD: transport engineering; vehicle transmissions.

SUBSTANCE: gear 11 and cluster of gears 9 and 10 are freely fitted on transmission secondary shaft 3. Shifter sleeve 24 (B) is arranged on hub of secondary shaft 3 between gear 11 and cluster of gears 9 and 10. Two gears 7 and 8 on primary shaft 2 are united into cluster and are arranged opposite to shifter sleeve of secondary shaft 3. Gear rim 18 of output shaft 4 of carrier 14 is two-position one. Gear rim 19 of output shaft 5 of set 1 is three-position one. Shifter sleeve 25 (C) on said rim has three internal gear rims. Gear rim 28 with internal and external meshing teeth is rigidly secured on slider 27 of shifter sleeve 25(C), external meshing teeth of gear rim being engaged with three-position gear rim of set housing.

EFFECT: improved operating capabilities of vehicle owing to optimum distribution of gears over range, improved gearshift mechanism and reduced metal usage of set.

2 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to gearbox of automobiles, crawler vehicles, two-member crawlers, crawler chassis of loggers, etc. proposed hydromechanical transmission has input shaft 1 and output shaft 2, four differential mechanisms, each including carrier, planet pinions, sun and epicyclic gears and six friction control members in form of clutches 11, 12 and brakes 7-10. Three differentials, whose sun gears 31, 27, 23 are installed on input shaft 1, form main planetary gear transmission. Epicyclic gears 28, 20 of first and third differentials are connected with carrier 25 of second differential. Carrier 29 of first differential is connected with brake 7 and, through friction clutch 11, with input shaft 1. Carrier 21 of third differential is connected with output shaft 2 through fourth differential used as divider at output.

EFFECT: simplified design, reduced speed of rotation of differential members and friction members, multipurposeness of transmission.

2 dwg

FIELD: transport engineering; tractors.

SUBSTANCE: invention relates to hydraulically operated friction clutches. Proposed friction clutch contains hub secured on shaft of gearbox, hydraulic cylinder with radial projections made on hub, piston with pressure disk, thrust disk, inner drum made integral with driven gear and connected by gear joint with driving disks, driven disks connected with outer drum, ring groove made on inner surface of outer drum, and lockring. Novelty is that outer drum and thrust disk are made in form of common part, outer drum is provided with longitudinal projections, with outer projections of driven disks fitted in slots between longitudinal projections. Ends of projections of outer drum are installed between radial projections of hydraulic cylinder, and lockring is arranged in ring channel formed by ring grooves made on inner surface of outer drum and on outer surface of hydraulic cylinder.

EFFECT: reduced wear of disks, increased transmitted power and improved repairability of clutch.

2 dwg

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