CN204739174U - Automatic Transmission for Hybrid Vehicles - Google Patents

Abstract

The utility model discloses an automatic gearbox for hybrid vehicle, include: gearbox housing installs two shaftings, three spur gear group, three planetary gear set and a plurality of unit of shifting gears side by side in, wherein, a shafting lies in the power inlet side, and including the primary shaft, a torque converter is installed to the input tip of the primary shaft, and another shafting lies in the power take off side, and including the secondary shaft, the secondary shaft is connected with a differential mechanism drive gear through first, the secondary shaft stretches out gearbox housing, and gearbox housing's outside sets up a motor, and the rotor and the stretching out of secondary shaft of motor are equipped with the second to drive gear between the tip. The utility model discloses a single motor scheme, control is simple, saves the cost, and the direct output with automatic gearbox of motor is connected in addition, need not pass through the automatic gearbox inside gear and the component of shifting gears, has improved transmission efficiency greatly, is particularly suitable for using on leading prodromal hybrid vehicle.

Description

Automatic Transmission for Hybrid Vehicles

technical field

The utility model relates to the technical field of automatic transmissions, in particular to an automatic transmission suitable for hybrid vehicles.

Background technique

A hybrid vehicle refers to a hybrid electric vehicle (Hybrid Electric Vehicle), which uses a traditional internal combustion engine (diesel engine or gasoline engine) and an electric motor as a power source, and some engines have been modified to use other alternative fuels, such as compressed natural gas, propane and ethanol fuel etc. With the increasingly stringent environmental protection measures around the world, hybrid vehicles have become a focus of research and development in the automotive field due to their energy-saving and low-emission characteristics.

In order to adapt to this trend, the Chinese invention patent CN101275630B discloses an automatic transmission (AT), which includes two shaft systems, three spur gear sets, three planetary gear sets and five shift units installed side by side, Eight forward gears and one reverse gear can be realized, and the power is drawn out of the transmission housing from a spur gear set and connected to a motor for starting the engine, driving the car together with the engine, and pure electric driving. But when this motor is working, its transmission line needs to pass through the gears and shift elements inside the automatic transmission, thus reducing the transmission efficiency.

There is also a dual-motor solution, which can provide stronger power, but the control system of the dual-motor is too complicated and the cost is high.

Utility model content

The technical problem to be solved by the utility model is to provide an automatic transmission suitable for use on a hybrid vehicle, which not only has a compact structure, high transmission efficiency, but also is easy to control and low in cost.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: an automatic transmission, comprising: a transmission housing, in which two shaft systems, three spur gear sets, three planetary gear sets and Several shifting units, wherein one shaft system is located on the power input side, including a first shaft, and a hydraulic torque converter is installed on the input end of the first shaft, and the other shaft system is located on the power output side, including a second shaft, the second shaft is connected with a differential through the first pair of transmission gears; one end of the second shaft protrudes from the transmission housing, and a motor is arranged outside the transmission housing, and the motor A second pair of transmission gears is provided between the rotor and the protruding end of the second shaft.

After adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

1) Single motor is adopted, which is easy to control and saves cost.

2) The external motor is directly connected to the output end of the automatic transmission without passing through the gears and shifting elements inside the automatic transmission, which greatly improves the transmission efficiency.

3) It is especially suitable for use on front-drive hybrid vehicles.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the second embodiment of the utility model;

Fig. 3 is the structural representation of the utility model embodiment three;

Fig. 4 is a schematic structural view of Embodiment 4 of the present utility model;

Fig. 5 is a schematic structural view of Embodiment 5 of the utility model;

in:

0-transmission housing; 1-first shaft; 2-second shaft; 3-first pair of transmission gears; 4-second pair of transmission gears; 5-motor; 6-hydraulic torque converter; FD-differential device;

TG610-the first spur gear set; G47-the second spur gear set; TG58-the third spur gear set;

PG1-the first planetary gear set; PG2-the second planetary gear set; PG3-the third planetary gear set;

Ho1-the first ring gear; Pt1-the first planet carrier; So1-the first sun gear;

Ho2-second ring gear; Pt2-second planet carrier; So2-second sun gear;

Ho3-the third ring gear; Pt3-the third planet carrier; So3-the third sun gear;

B1-first brake; B2-second brake; C1-first clutch; C2-second clutch; C3-third clutch; C4-fourth clutch; C5-fifth clutch; C6-sixth clutch.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Embodiment one

As shown in FIG. 1 , an automatic transmission includes two shaft systems, three spur gear sets, three planetary gear sets and five shifting units arranged side by side in a common transmission housing 0 . Three spur gear sets, namely: the first spur gear set TG610, the second spur gear set G47 and the third spur gear set TG58. Three planetary gear sets, namely: the first planetary gear set PG1, the second planetary gear set PG2; the third planetary gear set PG3. Five shifting units, namely: first brake B1; second brake B2; first clutch C1; second clutch C2; third clutch C3; fourth clutch C4. In this technical field, shafts with the same axis and components arranged on these shafts form a shaft system, wherein one shaft system is located on the power input side and includes a first shaft 1 on which a hydraulic The torque converter 6 is used to connect the input power with the engine; the other shaft system is located on the power output side, including a second shaft 2, and the second shaft 2 is connected to a differential FD through the first pair of transmission gears 3 for output power. Through the drawings, combined with the basic knowledge of mechanical drawing, those of ordinary skill in the art can understand the connection relationship of each component, which will not be repeated here.

The second shaft 2 protrudes from the transmission housing 0 , the motor 5 is arranged outside the transmission housing 0 , and a second pair of transmission gears 4 is arranged between the rotor of the motor 5 and the protruding end of the second shaft 2 . For the first pair of transmission gears 3 and the second pair of transmission gears 4, cylindrical gears such as spur gears, helical gears and herringbone gears are preferably used.

The protruding end of the second shaft 2 is located on the same side of the transmission case 0 as the hydraulic torque converter 6 , such an arrangement makes the entire transmission more compact.

The transmission can realize at least eight forward gears and at least one reverse gear without considering the above-mentioned motor, that is to say, the transmission is an improvement of an eight-speed automatic transmission. It adopts a single motor, which is simple to control and saves costs. Moreover, the motor is directly connected to the output end of the automatic transmission without going through the gears and shifting elements inside the automatic transmission, which greatly improves the transmission efficiency. It is especially suitable for front-wheel-drive hybrids Use in car.

The transmission can realize the following functions:

1. Pure electric driving. At this time, the motor 5 is used as a motor, and the power route is:

Motor 5 → second pair of transmission gears 4 → second shaft 2 → first pair of transmission gears 3 → differential FD.

2. Combined work output of engine and motor. At this time, the motor 5 is used as a motor, and the power route is:

1) Engine→torque converter 6→first shaft 1→combination of a certain gear→second shaft 2→first pair of transmission gears 3→differential FD;

2) Motor 5 → second pair of transmission gears 4 → second shaft 2 → first pair of transmission gears 3 → differential FD.

3. Engine charging. It is basically the same as the above joint work output mode, the difference is that the motor 5 is used as a generator at this time.

4. Braking energy recovery. At this time, the motor 5 is used as a generator, and the power route is: when braking or braking, the wheel→the differential FD→the first pair of transmission gears 3→the second shaft 2→the second pair of transmission gears 4→the motor 5.

5. The engine works alone. At this time, the motor 5 does not work, and the power route is: engine → hydraulic torque converter 6 → first shaft 1 → certain gear combination → second shaft 2 → first pair of transmission gears 3 → differential FD.

Embodiment two

As shown in FIG. 2 , the structure is basically the same as that of Embodiment 1, except that the second brake B2 is added, and at least nine forward gears and at least one reverse gear can be realized without considering the motor 5 .

Embodiment three

As shown in Figure 3, the structure is basically the same as that of Embodiment 1, except that a fifth clutch C5 is added to control the third sun gear So3, the third ring gear Ho3 and the third planetary carrier Pt3. A rigid connection is established for each element, and at the same time, the connection relationship of some components is also adjusted. Regardless of the electric machine 5, at least eleven forward gears and at least one reverse gear can be realized.

Embodiment four

As shown in Figure 4, the structure is basically the same as that of Embodiment 1, except that a fifth clutch C5 is added to control the third sun gear So3, the third ring gear Ho3 and the third planetary carrier Pt3. The components are rigidly connected. Irrespective of the electric machine 5, at least twelve forward gears and at least one reverse gear can be realized.

Embodiment five

As shown in Figure 5, the structure is basically the same as that of Embodiment 1, except that a fifth clutch C5 is added to control the second sun gear So2, the second ring gear Ho2 and the second planetary carrier Pt2. The components are rigidly connected. Regardless of the electric machine 5, at least thirteen forward gears and at least one reverse gear can be realized.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (3)

1. an automatic transmission, comprising:

Case of transmission, two axle systems, three commutating tooth wheels, three planetary gear set and several gear shift units are installed in described case of transmission side by side, wherein, an axle system is positioned at power input side, comprise the first axle, the input end of described first axle is provided with a fluid torque converter, and another axle system is positioned at Power output side, comprise the second axle, described second axle is connected with a differential mechanism by first pair of driving gear; It is characterized in that,

Described case of transmission is stretched out in one end of described second axle, and outer installment motor of described case of transmission, is provided with second pair of driving gear between the rotor of described motor and the projecting end of described second axle.

2. automatic transmission as claimed in claim 1, it is characterized in that, the projecting end of described second axle and described fluid torque converter are positioned at the same side of described case of transmission.

3. automatic transmission as claimed in claim 1 or 2, it is characterized in that, described first pair of driving gear and second pair of driving gear are cylindrical gears.