SU407756A1 - HYDROMECHANICAL TRANSMISSION - Google Patents

Description

one

The invention relates to mechanical engineering and can be used in the transmission of transport vehicles, for example, in automobiles.

Designs of hydromechanical gearboxes are known, consisting of a torque converter and a mechanical gearbox, containing its primary, intermediate and output shafts, multi-plate friction clutches for coupling the gears of the gearbox to the shafts, and a gear clutch in series with the friction clutches to enable the forward stages The reversing steps are via an intermediate gear engaged with the intermediate gear and the output shaft.

However, the known constructions of hydromechanical transmissions, during their operation, create a lot of noise, since the intermediate reverse gear rotates with revolutions exceeding in direct transmission the output shaft revolutions up to two or more times. In addition, there is a lot of wear and power loss due to the fact that the output shaft rotates in one direction on the forward gears and the reverse gear is mounted on it in the opposite direction.

The aim of the invention is to reduce noise during operation of a hydromechanical box.

gears, increasing its efficiency and durability of parts.

For this, the intermediate gear is axially mounted.

for disengaging it from the gear of the intermediate and output shafts, and when this gear is extended, the distance from the end of its teeth to the end of the teeth of the gear of the intermediate shaft is smaller,

than to the end of the gear teeth of the output shaft.

The invention is illustrated in the drawings. FIG. 1 shows a kinematic diagram of a hydromechanical transmission; in fig.

2 shows a variant of the arrangement of the shafts in the transverse plane of the hydromechanical gearbox; in fig. 3 - section bb (Fig. 2).

The hydromechanical transmission consists of a torque converter 1, a shaft 2 of a turbine wheel, an intermediate shaft 3, an output shaft 4, a friction clutch of the first gear 5, a clutch of the second gear 6, a clutch of third gear 7, gears of the first gear 8 and 9, gears of the second gear 10 and 11, gears of the permanent gearing of the forward gear 12 and 13, the gear 14 of the intermediate shaft reverse gear, the gear 15 of the reverse gear of the output shaft, the intermediate gear 16 of the reverse gear, freely mounted

on the axle 17, the gear clutch 18, the forks 19 for controlling the reverse intermediate gear and the gear clutch and the forks 20 of the forks.

On the forward gears, the hydraulic transmission works as follows. In the first gear, the friction clutch of the first gear 5 is turned on. The torque from the tidrotransformer 1 is transmitted to the output shaft 4, through the shaft 2 of the turbine wheel, the gears of the first gear 8 and 9, the clutch 5, the intermediate shaft 3, gears of the permanent gearing of the forward gear 12 and 13 and a gear coupling 18.

In the second gear, the friction clutch of the second gear 6 is engaged. The torque from the shaft 2 is transmitted to the output shaft 4, through the clutch 6 to the gears 10 and 11 and further on in the same way as in the first gear.

In third gear, the clutch 7 is engaged. The torque is transmitted from the shaft 2 directly to the output shaft 4.

In all forward gears of the camshaft, clutch 18 is in the right extreme position, while the intermediate reverse gear is disengaged from gears 14 and 15 and does not rotate. The gear 14 is rigidly fixed and rotates together with the shaft 3, and the gear 15, mounted loosely on the shaft 4, can rotate together with the shaft, due to the forces of friction.

In the reverse gear, the camshaft clutch 18, together with the gear 16, is moved to the far left position with the same yoke 19.

four

In this case, there will be a clear inclusion, since the distance from the end of the teeth of the intermediate gear to the end of the teeth of the gear of the intermediate shaft 1 is smaller than to the end of the teeth of the gear of the output shaft, i.e. the distances indicated in FIG. 1 by the letters C, D, D, are in the ratio C; G - D.

The subject of the invention

Hydromechanical gearbox consisting of a torque converter and a mechanical gearbox containing primary, intermediate and output shafts, multi-plate friction clutches for connecting the gears of the gearbox to the shafts sequentially installed with the friction clutches toothed clutch for activating the forward speed and reverse gear through the intermediate gear meshed with the gears of the intermediate and output shafts, characterized in that, in order to reduce noise during operation, to increase its efficiency and durability The intermediate gear is axially mounted for disengagement from the gear of the intermediate and output shafts, and when this gear is extended, the distance from the end of its teeth to the end of the gear teeth of the intermediate shaft is smaller than the end of the gear teeth of the output shaft.

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