CS195135B1 - Multistage high-speed planet gearbox,particularly for the motor vehicles - Google Patents

Description

The subject of the invention is a four to five-speed reverse gear planetary gearbox suitable for use in conjunction with a hydrodynamic member, particularly for motor vehicles.

The known four-speed gearboxes, which can be extended to a five-speed gearbox by means of a superstructure on the base rear of the gearbox, are generally designed so that the highest gear ratio is 1.0. Also, the current four-speed overdrive gearbox at the highest stage has a power circulation at lower stages, which greatly reduces the load capacity of the transmission.

The above drawbacks are overcome by the multistage high-speed planetary watercraft according to the invention, consisting of a known combination of two brakes, two clutches and two planetary gears whose center wheels are rigidly connected to each other. The satellite carrier of the first planetary gearing can be connected with the second brake to the transmission chamber. The ring gear of the first planetary gear is rigidly connected to the satellite planetary gear of the second planetary gear and at the same time to the output shaft and the ring gear of the second planetary gear is the second clutch connectable to the input shaft. by the central wheels of the two planetary gears, the satellite carrier is inserted between the second clutch connecting it to the crown wheel of the second planetary gear. It is rigidly connected to the input shaft, and its ring gear is connectable by a third clutch to the output shaft. This creates a four-speed reverse gear. A further addition of the fourth planetary gear and the third brake creates a five-speed reverse gear. The fourth planetary gear is connected so that the sun gear is firmly connected to the input shaft. cannon and crown wheel can be connected by a third brake to the gearbox chamber.

By designing the multi-speed high-speed planetary gearbox according to the invention, it is achieved that the highest gear is an overdrive, but does not circulate any power at the lower stages. Both of these features provide a valuable advantage over the existing solutions in the lower torque load of the planetary gears and the shift members at the same input torque. This makes it possible to create gearboxes for greater input torque at the same dimensions and weight. A further advantage of the invention over some known solutions is the shifting of the individual steps, which is carried out only by switching off one and the other shifting member, while the other shifting member previously engaged remains engaged during shifting. This greatly simplifies the transmission control device, especially if it is designed to be automatic.

Two examples of the invention are shown in the accompanying drawings, in which: FIG. 1 is a diagram of a four-speed gearbox;

diagram of a five-speed gearbox;

Fig. 4 is a schematic diagram of a four-speed gearbox;

The transmission consists of a first planetary gear set P, a second planetary gear set Q and a third planetary gear set S1, a first clutch S2 and a third clutch S3, a first brake B1 and a second * The central wheels of the three planetary gears P, Q and R are rigidly connected to each other and can either be connected by the first «brake B1 to the transmission chamber 3 or the first clutch S1 with the input shaft». the third planetary gear R which may be the second clutch 21 connected with the ring gear of the second planetary gear set Q output shaft 2 J ^e is firmly connected to the planet carrier of the second planetary gear mechanism Q and to the crown gear of the first planetary soukolí.2> ^and is further connectable with the ring gear of the third planetary gear set R by means of the third clutch 22.

The gear shifting is shown in Fig. 3.

A diagram of a five-speed transmission according to the invention derived from a four-speed transmission is shown in FIG.

2,

SUBJECT V

Claims (2)

SUBJECT V Multistage high-speed planetary gearbox, in particular for motor vehicles, formed by combining two brakes, two clutches and two planetary gears, the central wheels of which are rigidly connected to each other and are connected either by the first clutch to the input shaft or the first planetary gears are provided with a second brake, the first planetary ring gear is rigidly connected to the second planetary gear carrier and simultaneously to the output shaft, and the second planetary gear ring gear is connected to the second clutch with an input shaft, characterized in that the sun gear the third planetary gear (R) is rigidly connected to the sun gears of the first planetary gear ('P.') and the second planetary gear; ^; : .2 The gearbox is formed by adding a fourth planetary gear train 2 to three planetary gears 2 R. Furthermore, by adding the third brake B3 to the two brakes B1 and B2. The first planetary gear set 2 »the second planetary gear set 2» the third planetary gear set R, the first clutch S1, the second clutch 22. »the third clutch S 3 and the first brake, B1 and second spring B2 are engaged, as in FIG. gearbox. The fourth planetary gearing S is connected to the existing gearbox so that it carries the satellites securely connected to the transmission and the sun gear 2 is fixed to the input shaft 2 ^{and the} ring gear. • connect the third planetary gear 2 ^ - ^{from the} third brake B3 to the transmission chamber 2 · The third brake B3 engages first gear. The magnitude of the transmission ratio of this transmission. The stiffness can easily be selected as desired only by determining the conversion between the crown and the central gear of the fourth planetary gear train. The schematic diagram of the individual gears of the five-speed gearboxes is shown in FIG. 4. A second clutch (S2) is inserted between a satellite carrier which is fixedly connected to an input shaft (1) and a second planet gear (Q) is engaged and a second planet gear (Q) is coupled to the third device / S3 / with output shaft 'lein / 2 /. ' Multistage high-speed planetary gearbox, in particular for motor vehicles according to claim 1, characterized in that a carrier is fixedly connected to the output shaft (2) and the ring gear of the first planetary gear (P) and the satellite carrier of the second planetary gear (Q). satellites of the fourth planetary gear (T) fixedly connected to the input shaft (1) and its ring gear is provided with a third brake (B3 ·). 2 sheets of drawings Severogrróa. n. sivod 7, Mo »t