Hydro-mechanical transmission of a vehicle with two or more ranges

 

(57) Abstract:

The invention relates to transport machinery and can be used as a Central or side hydromechanical transmission with two or more ranges in the transmission of various tracked and wheeled vehicles. Hydro-mechanical transmission includes a housing, two hydraulic machines, one of which is adjustable, driving and driven shafts, two planetary differential, forming a planetary chetyrehzvennoj, box matching gear and driven gear couplings. The kinematic scheme of the hydro-mechanical transmission constructed in such a way that it becomes possible to drive the motor to install in a separate case, which can turn around the axis of the planetary differentials, to take in the space of different positions, creating a configuration of a hydrostatic transmission, an appropriate vehicle lineup. Increased compositional properties of the hydro-mechanical transmission, the quality of the switching process and reduced switching time. 2 Il.

The invention relates to transport machinery and can be used as a Central or side hydromechanical carton PE the technical literature known hydromechanical transmission with two or more ranges /1/, /2/, /3/.

Known hydromechanical transmission for vehicles, comprising a housing, two hydraulically interconnected hydraulic machines, at least one of which is made adjustable, driving and driven shafts, kinematically associated with hydraulic machines, planetary differential input link is associated with one of the hydraulic machines, and output - driven shaft through gears, and the driven coupling /1/. This design is selected by the authors for the prototype.

The disadvantages of the known hydromechanical transmission is imperfect transition from one mode to another. Installing transmission parallel to the hydrostatic transmission and the planetary differential leads to the necessity of switching modes (ranges) to change the angular velocity of the motor and its associated sun gear of the planetary differential of the maximum value at the end of the previous regime to a minimum in the beginning of the next, i.e., return the motor to its original position. This leads to increased time spent on switching, i.e. the reduction of the dynamic properties of the machine during acceleration. Consistent placement of the actuator gidroteh elements in one case lead to an increase in the axial size of the transmission and the difficulty in placing a hydromechanical transmission in vehicles, with a different lineup. The transition to direct (mechanical) transmission changes the way the regulation speed: instead of regulating hydraulic branch is regulated by the engine.

An object of the invention is to improve the quality management process improvement compositional properties when using hydromechanical transmission in various tracked and wheeled vehicles.

The technical problem is solved by the fact that in a hydraulic transmission, comprising a housing, two hydraulically interconnected hydraulic machines, at least one of which is adjustable, driving and driven shafts, kinematically associated with hydraulic machines, planetary differential box matching gear associated with the drive shaft and driven gear couplings, installed optional second planetary differential forms with existing planetary chetyrehzvennoj connected through a matching box transmission with drive shaft and drove through one and epicycle gear of the other planetary differentials with the driven shaft, and the casing is made of two parts, one of which has a u-turn.

time for the switching process, the reduction of the axial size of the transmission, the improvement of the layout properties when using hydromechanical transmission in various tracked and wheeled vehicles, due to the relative spread is divided into two housing parts, which are interconnected by means of a flange connection.

In Fig.1 shows a diagram of a hydromechanical transmission; Fig.2 - limit position of the drive chassis of the motor when you turn it relative to the gear.

Hydromechanical transmission contains two housings 1 and 2, the leading 3 and slave 4 shafts, two hydraulically interconnected hydraulic machines 5 and 6, one of which is adjustable. In case 1 posted by underlying mechanism 7, box matching gear 8, the gear 9, 10, 11 drive hydraulic pump 5. The underlying mechanism 7 includes two planetary differential 12 and 13. In case 2 set of gears 14, 15, 16 of the drive motor 6. The housing 2 is mounted on the body 1 by a cylindrical flange 17 with the centering collar. This connection allows you to expand the housing 2 around the axis of the planetary differentials relative to the housing 1.

Box matching transmission contains the pole is otwartego range, coupling 24 enable the second and fourth ranges, coupling 25 enable the first and third ranges, the fixed ring gear 26 of the first range and the gear 27 of the third range.

In the General case, the number of gears is equal to the number of double-flow ranges.

Driven shaft 4 is connected to the planet carrier 28 of the first planetary differential 12 and epicycle gear 29 of the second planetary differential gear 13. Epicycle gear 30 of the first planetary differential gear 12 is connected matching the transmission through the gears 20, 21, coupling 25 with a ring gear 27 of the driving shaft 3 in the third range, or with a fixed ring gear 26 on the first range.

Led 31 of the second planetary differential gear 13 has a coupling 24, by means of which engages with the gear 19 matching transmission of the second range and the gear 23 matching transmission of the fourth range. The gears 18 and 22 terminating transmission of the second and fourth ranges and gear 27 mounted on the control shaft 3.

Hydromechanical transmission works as follows.

On the first range when the connection coupling 25 and gear 26, sacrament drive shaft 3 is transmitted through the pinion 9, 10 and 11, the drive of the hydraulic pump to the hydraulic pump 5, the hydraulic motor 6 through the gears 14, 15 and 16 of the drive motor to the sun gear 32 of the first planetary differential 12 and drove 28 associated with the driven shaft 4. The first range is the full-flow and when reversing hydraulic pump is reverse gear.

In other ranges hydromechanical transmission works as a double-flow.

On the second band connected to the clutch 24 with the gear 19 and the power from the driving shaft is transmitted through gears 18 and 19 to the cage 31 of the second planetary differential gear 13. The second branch of the dual stream transmission is from the drive shaft 3 through gears 9, 10, 11 of the drive of the hydraulic pump, the hydraulic pump 5, the hydraulic motor 6, the gears 14, 15, 16 of the drive motor to the sun gear 33 of the second planetary differential gear 13. On the second range when the parameter regulation of the hydraulic pump in the range from (-1) to About two transmission works with the circulation of power, and in the range from About to 1 - transfer of power in two streams. Similarly, there is a transfer of power and the fourth range, only in this case, the clutch 24 is connected with the gear 23 of the matching transmission of the fourth range.

The third band LCLUC and the sleeve 25 to the gear 20, 21 matching transmission to the epicycle gear 30 of the first planetary differential gear 12. The second branch of the dual stream transmission is similar to the second branches of the second and fourth bands. On the third range when the parameter regulation of the hydraulic pump in the range from (-1) to 0 is the transmission power of the two streams, and in the range from 0 to 1 with a circulation of power.

To match the hydromechanical transmission of the line vehicle configuration transfer in the transverse plane can be changed. For this disconnect coupling bolts cylindrical flange 17 and deploy the housing 2 of the drive motor relative to the housing 1 transmission. The drawing shows the marginal position 2I, 2II, 2IIIthe housing 2 of the drive motor relative to the housing 1 transmission.

This design makes it possible to improve the quality management process to improve compositional properties when using hydromechanical transmission in various tracked and wheeled vehicles.

Sources of information

1. A. c. USSR N 1272040 A1, class F 16 H 47/00.

2. Application N 93035917, CL F 16 H 47/04.

3. Volume hydromechanical peredauscheie. 1987. - 256 S.

Hydro-mechanical transmission of a vehicle with two or more ranges, comprising a housing, two hydraulically interconnected hydraulic machines, at least one of which is adjustable, driving and driven shafts, kinematically associated with hydraulic machines, planetary differential box matching gear associated with the drive shaft, and driven toothed clutch, wherein the hydraulic transmission has advanced the second planetary differential forms with existing planetary chetyrehzvennoj connected through a matching box transmission with drive shaft and drove through one and epicycle gear of the other planetary differential - driven shaft, and the body is made of two parts, one of which has a u-turn.

 

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