Hydromechanical transmission

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

 

The invention relates to a transport machine-building, namely the gear boxes of vehicles, tracked transport and traction machine, two tracked vehicles, tracked chassis of woodworking machines and other

Of scientific and technical literature known scheme hydro-mechanical transmission of a vehicle truck having six speeds forward and one back, containing the input and output shafts, three differential mechanism, each of which has led, satellites, solar and epicycle gear, and six friction controls in the form of clutches and brakes. Two differential mechanism form the main epicyclic gear: pinion carrier of the second differential mechanism and epicycle gear of the first connected with each other and with the output shaft, the carrier of the first differential mechanism associated with the brake, a sun gear of the first and second differential mechanisms connected and the brake. The third differential mechanism is slowing divider at the input, epicycle gear which is connected with the input shaft, a sun gear connected with the brake and through the clutch with the input shaft, and drove through the clutch is connected with a sun gear of the first and second differential mechanisms and, in addition, through another mu is that with epicycle gear of the second differential mechanism (see Design of vehicle drive trains: a Handbook / edited amended Aigrettes. - M.: Mashinostroenie, 1984, - 272 S. p. 205, PL. 8.4).

However, the drawback schemes such hydromechanical transmission is the complexity of the connection carrier of the second differential mechanism with epicycle gear of the first differential mechanism, coaxial shaft arrangement sun gears of the first and second differential mechanisms, as well as the receipt of each transmission occurs with the simultaneous inclusion of three friction elements.

Installed at the entrance to slow the divisor increases torque at the entrance to the main transmission compared with the engine torque, which causes the increasing load on the teeth and friction elements, in addition, hydromechanical transmission can only be used on those vehicles that require direct top gear.

Closest to the proposed and adopted for the prototype scheme hydromechanical transmission Allison CLBT 5860, with six speeds forward and one back, containing the input and output shafts, four differential mechanism, each of which has led, satellites, solar and epicycle gear, and six friction controls in the form of clutches and brakes. Three differential mechanism form the bases of the second epicyclic gear: pinion carrier of the first differential mechanism connected with the output shaft and the planet carrier of the second differential mechanism, epicycle gear is connected with the brake, a sun gear connected with epicycles and second planet carrier of the third differential gears; a sun gear of the second and third differential mechanisms are interconnected and coupled with epicycle gear of the third differential mechanism. The fourth differential mechanism is accelerating divider at the input, the led which is connected with the input shaft, a sun gear connected with the brake and through the clutch with the input shaft, and the epicycle gear with a sun gear of the second and third differential mechanisms (see Narbut A.N., Narbut NI New generation of GMP firm Allison // Tractors and agricultural machines. - 1995, No. 4, s-29, risb).

However, the lack of constructive schemes such hydromechanical transmission is the complexity of the connections between the differential mechanisms, these include compounds were taken of the first and second differential mechanisms, the compounds of the sun gear of the first epicycle gear second and took third differential mechanisms, which determines the location of the second differential mechanism inside of the connecting links, the complexity of the design of the supports and the increase in size.

Installed at the entrance of the accelerating divider increases the rotational speed of the input is in the main gearbox compared to the engine speed and, as a result, the rotational speed of the links of the differential mechanisms and friction elements, which leads to an increase in losses on idle rotation and the dynamic loads on the teeth, in addition, hydromechanical transmission can only be used on those vehicles that require higher accelerating the transfer.

The technical problem of the invention consists in simplifying the structure, reducing the frequency of rotation of the links of the differential mechanisms and friction elements in achieving the universality of the hydromechanical transmission.

This object is achieved due to the fact that hydro-mechanical transmission includes input and output shafts, four differential mechanism, each of which has led, satellites, solar and epicycle gear, and six friction controls in the form of clutches and brakes, and three differential mechanism, a sun gear mounted on the input shaft, form the basic planetary gearbox, epicycle gear of the first and second differential mechanisms connected with the planet carrier of the second carrier connected to the first brake and through the friction clutch with the input shaft, the carrier of the third differential mechanism connected with the output shaft through fourth differential mechanism used CA is reversible divider at the output.

When installing a divider on the output speed at the entrance to the main transmission is equal to the engine speed and, as a consequence, the rotational speed of the links of the differential mechanisms and friction elements will be less than when installing a divider at the input.

The divisor by reference parts of the differential mechanism enables to obtain direct or accelerating the highest transmission and thereby to achieve the universality of the transmission.

The receipt of each transmission occurs with the simultaneous inclusion of two friction elements.

The invention is illustrated in the drawing, where figure 1 shows the kinematic diagram of a hydromechanical transmission (no torque Converter) with accelerating divider output, figure 2 presents the scheme of the hydromechanical transmission (without Converter) slow-wave divider at the output.

Hydromechanical transmission contains the input 1 and output 2 shafts, differential mechanisms 3, 4, 5 and 6, the brake 7, 8, 9 and 10, the clutch 11 and 12. Differential mechanisms 3, 4 and 5 brakes 7, 8 and 9, the clutch 11 form the basic three-stage epicyclic gear 13, and the differential mechanism 6, the brake 10 and the sleeve 11 are reversible divider, which can be 14 accelerating or decelerating 15.

The differential mechanism 6 consists of the epicycle is esterni 16, drove 17 with satellites 18 and sun gear 19. The sun gear 19 is connected to the brake 10 and through the sleeve 12 with epicycle gear 16. Epicycle gear 16 is connected to the output shaft 2, and is formed accelerating the divider 14.

When contacting parts of the differential mechanism 6, when the carrier 17 is connected with the output shaft 2, the divisor becomes slow 15.

The differential mechanism 5 consists of the epicycle gear 20, drove 21 with satellites 22 and sun gear 23. Epicycle gear 20 is connected to the brake 9. The sun gear 23 is connected with the input shaft 1.

The differential mechanism 4 consists of the epicycle gear 24, pinion carrier 25 with satellites 26 and the sun gear 27. Drove 25 is connected with epicycle gear 20 of the differential mechanism 5. Epicycle gear 24 is connected to the brake 8. The sun gear 27 is connected with the input shaft 1.

The differential mechanism 3 consists of the epicycle gear 28, the carrier 29 with satellites 30 and sun gear 31. Epicycle gear 28 is connected to the planet carrier 25 of the differential mechanism 4. Led 29 is connected to the brake 7 and through the sleeve 11 with the input shaft 1. The sun gear 31 is connected with the input shaft 1.

Hydromechanical transmission has six speeds forward and two reverse gears.

Control E. the elements hydromechanical transmission: brake 9, the first and second gears, the brake 8 of the third and fourth gear clutch 11 of the fifth and sixth gear, the brake 7 reverse gears, the clutch 12 lower secondary and brake 10 highest stage for accelerating divider 14 or sleeve 12 high-speed and brake 10 lower level to slow down divider 15.

Hydromechanical transmission works as follows.

The first, third and fifth forward gears and the first reverse gear are formed when switching clutch 12 lower level accelerating divider 14.

The second, fourth and sixth forward gears and a second reverse gear are formed when the brake is being applied 10 highest stage of accelerating divider 14.

The first, third and fifth forward gears and the first reverse gear are formed when the brake is being applied 10 the lower stage of the slowing down of the divider 15.

The second, fourth and sixth forward gears and a second reverse gear are formed when switching clutch 12 high-speed slowing down of the divider 15.

The first and the second transmission are formed when the brake is being applied 9 main gear box 13. Power from the input shaft 1 is transmitted through the sun gear 23, the led 21 and the divider to the output shaft 2.

The third and fourth transmission are formed when turning on the brake 8. This differential mechanisms 4 and 5 is formed of a two-line transmission, working in the eime branching power. Power from the input shaft 1 is transmitted to the cage 21 and through the divider to the output shaft 2 in two streams: the first is through the sun gear 23, the second is through the sun gear 27, drove 25 and epicycle gear 20.

The fifth and sixth transmission are formed by the inclusion of the coupling 11. Coupling 11 locks the two elements of the differential mechanism 3: the sun gear 31 and the carrier 29 and formed a direct transfer.

Reverse gears are formed when turning on the brake 7. This differential mechanisms 3 and 5 is formed dual stream transmission mode of the circulation of power. Power from the input shaft 1 is transmitted through a two-stream transmission to the cage 21 and through the divider to the output shaft 2.

The parameters of the differential mechanisms 3, 4 and 6 are identical and are selected in such a way that ensures that the number of gear ratios by geometric progression.

The use of the proposed scheme hydromechanical transmission as compared with the prototype allows to simplify the design, reduce the speed differential links mechanisms and friction elements and to achieve the universality of transmission through the use of reversible divider to produce a straight or higher accelerating the transfer.

Hydromechanical transmission containing the input and output shafts, four differential IU is anima, each of which has led, satellites, solar and epicycle gear, and six friction controls in the form of clutches and brakes, characterized in that the three differential mechanism, a sun gear mounted on the input shaft, form the basic planetary gearbox, epicycle gear of the first and second differential mechanisms connected with the planet carrier of the second carrier connected to the first brake and through the friction clutch with the input shaft, the carrier of the third differential mechanism connected with the output shaft through fourth differential mechanism is used as the divider output, which is due to the treatment of parts of the differential mechanism can be performed slowing down or accelerating.



 

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FIELD: transport engineering.

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FIELD: transport engineering.

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FIELD: transport engineering.

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4 dwg

FIELD: mechanical engineering.

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2 dwg

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