SU1698538A1 - Planetary gearbox - Google Patents

Abstract

The invention relates to mechanical engineering, namely to planetary boxes for wheeled and tracked vehicles. The aim of the invention is to increase the range of gear ratios and their values by changing the kinematic scheme of the box. The box contains input 1, intermediate 2 and output 3 shafts, four brakes 4-7, two couplings 8, 9, four planetary rows, each of which includes two central wheels - one with external, another with internal teeth, and a carrier with satellites. The simultaneous activation of two brake controls or clutches provides six gears forward and one back. 1 tab., 1 Il.

Description

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The invention relates to mechanical engineering, namely to planetary gearboxes for wheeled and tracked vehicles.

The purpose of the invention is to increase the range of gear ratios and their values by changing the kinematic scheme of the box.

The drawing shows a kinematic diagram of a planetary gearbox.

The box contains coaxial input 1, intermediate 2, and output 3 shafts, four brakes 4-7, two couplings 8-9, four planetary rows. The first row contains a central wheel 10 with external teeth, a central wheel 11 with internal teeth, and a carrier 12 with satellites. The second row contains a central wheel 13 with outer teeth, a central wheel 14 with internal teeth, and a carrier 15 with satellites. The third row contains a central wheel 16 with external teeth, a central wheel 17 with internal teeth, and a carrier 18 with satellites. The fourth row contains a central wheel 19 with external teeth, a central wheel 20 with internal teeth, and a carrier of 21c satellites.

The input shaft 1 is connected to the central wheel 11 of the first row and the central wheel 13 of the second row and via coupling 8 is connected with the intermediate shaft 2 and the central wheel 16. The intermediate shaft 2 is connected to the carrier 15 of the second row and through coupling 9 output shaft 3, carrier 18 and 21, the third and fourth row, respectively. Drove 12 first p yes connected to the central wheel 14 second p yes. The central wheel 19 of the fourth row is connected to the central wheel 17 of the third row, and the central wheels 10, 14, 17 and 20 are connected to the brakes 4-7, respectively.

The planetary box works as follows.

The box has three degrees of freedom and it is necessary to turn on two control elements from among the specified clutches and brakes in order to receive the gear.

The table shows the numbers of gears that are included in this control elements and the magnitudes of the gear ratios implemented on these programs.

In the first gear, rotation from the input shaft 1 is transmitted to the central wheel 13 of the second row, from the carrier 15 of the same row to the central wheel 16 of the third row and from the carrier 18 of the same row to the output shaft 3.

In the second gear, when the input shaft 1 rotates, the power flow separates

the power flow passing through the first row and the central wheel 11 and the carrier 12, and the second stream through the central wheel 13 of the second row, where the flows are summed and transmitted further through the carrier 15 of the second row to the central wheel 16 of the third row and 18 through the third pter through the output shaft 3.

In the third gear, rotation from the input shaft is transmitted to the central wheel 13 of the second row and to the carrier 15 of the same row and then through the coupling 9 to the output shaft 3.

In the fourth gear, rotation from the input shaft 1 is transmitted through the coupling 8 to the central wheel 16 of the third row and through the carrier 18 of this row to the output shaft 3.

In the fifth transmission, the power from the input shaft 1 is divided into two streams, one of them passes through the first row, the central wheel 11, the carrier 12, the second stream passes through the central wheel 13 of the second row, stacks on the driver 15 of this row and then, via coupling 9, is transmitted to output shaft 3.

Sixth gear - right is realized by turning on two clutches 8 and 9. Reverse gear is realized by turning on clutch 8; resulting in rotation from the output shaft of the central wheel 16 of the third row, then power is transmitted through the carrier 18 and the central wheel 17 of this row to the output shaft and the central wheel 19 of the fourth row and the carrier 21 of the same row.

Expanding the range of gear ratios in the boxes provides the possibility of using it in various transport vehicles.

Claims (1)

Formula of gain A planetary gearbox containing coaxial input, intermediate and output shafts, four brakes and two clutches, and four planetary rows, including each central wheel with outer wheels, a central wheel with internal teeth, drove with satellites, the input shaft through the first clutch is connected with the intermediate shaft, the latter is connected to the central wheel with the outer teeth of the third row, the output shaft is connected to the carrier of the third and fourth rows, the carrier of the first row is connected to the central wheel with the internal teeth of the second the last, the last and the central wheels with internal teeth, of the third and fourth rows are connected to the brakes, characterized in that, in order to increase the range of gear ratios and their values, the input shaft is connected to the central wheel with the internal teeth of the first p yes, the central wheel with the outer teeth of this row is connected to the brake, the carrier of the second row is connected to the intermediate shaft, the central wheel with the outer teeth of the third row and the second the coupling is connected with the output shaft, and the central wheel with internal teeth of the third row is connected with the central wheel with external teeth of the fourth row.