JPS6361207B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention applies to transverse engine FF (front engine
(Front drive) relates to an automobile drive device suitable for use in cars. [Prior art] Conventionally, in transmissions for front-wheel drive vehicles with horizontal engines, the output shafts of the transmission and differential were arranged parallel to each other due to the space on which the transmission was installed, and these two shafts were connected using gears, etc. Then, the output power of the transmission is finally reduced by the gear and transmitted to the input shaft of the differential gear. [Problems to be Solved by the Invention] However, if the power transmission between the two parallel axes is carried out using a chain, the ease of assembly will be improved compared to using gears, but in order to achieve large deceleration using the chain,
It becomes necessary to increase the rigidity of the chain, which increases the width of the chain and increases the axial dimension of the transmission, which is undesirable in terms of space. Therefore, in order to solve the above problems, the present invention has the following features:
The output shaft of the transmission, which is installed parallel to each other, and the input shaft of the final reduction gear, which is installed coaxially with the output shaft of the differential, are connected by a chain. An object of the present invention is to provide a drive device for an automobile in which the tension can be set near the center of the vehicle. [Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems. a hydraulic torque converter; a transmission having a plurality of forward speeds and a plurality of reverse speeds, the transmission having at least one planetary gear mechanism and a plurality of frictional engagement elements coaxially connected to the hydraulic torque converter; , a final reduction gear consisting of a planetary gear transmission mechanism provided parallel to the axial direction of the transmission, a first sprocket provided on the output shaft of the transmission, and an input shaft of the final reduction gear. a second sprocket provided in the second sprocket, a chain provided between the two sprockets, and a differential device that transmits power from the output shaft of the final reduction gear to the left and right axle shafts,
The transmission is disposed on the opposite side of the engine with respect to the chain and the hydraulic torque converter, and the final reduction gear and the differential are disposed on the same side of the chain as the engine and on the opposite side of the engine. A reduction gear is disposed between the chain and the differential device. [Operations and Effects] The present invention connects the output shaft of a transmission and the input shaft of a final reduction gear arranged parallel to the output shaft with a chain, and the final reduction is performed between the chain and the differential gear. Since this is carried out by a final reduction gear disposed coaxially with the differential gear, there is no need to particularly increase the rigidity of the chain, and a compact automobile drive device with good assemblability can be obtained. Furthermore, since the chain is provided on the same side of the transmission as the hydraulic torque converter, the differential can be placed near the center of the vehicle. [Embodiment] Fig. 1 shows an embodiment suitable for a FF vehicle, in which the crankshaft 2 of the engine 1 is connected to a hydraulic torque converter 3.
It is connected to the. The hydraulic torque converter 3 is well known and comprises a pump impeller 4 connected to the crankshaft 2, a stator 7 connected to a stationary part 6 via a one-way clutch 5, and a turbine runner 8. The transmission 10 is provided coaxially with the crankshaft 2, and in this embodiment constitutes an underdrive device with three forward speeds and one reverse speed. An input shaft 11 of the transmission 10 is disposed coaxially with the crankshaft 2 and connected to the turbine runner 8. A multi-disc clutch 13 is provided between the input shaft 11 and the sun gear shaft 12, and a multi-disc brake 1 is provided between the sun gear shaft 12 and the transmission case 14.
5 is provided. The sun gear 16 provided on the sun gear shaft 12 is connected to a carrier 17,
a planetary pinion 18 supported by a ring gear 19 meshing with the planetary pinion 18; another carrier 20;
Together with the planetary pinion 21 supported by the planetary pinion 21 and the ring gear 22 meshing with the planetary pinion 21, a two-row planetary gear system is constructed.
A multi-plate clutch 23 is provided between the ring gear 19 and the input shaft 11 in one of the planetary gears. Further, the carrier 17 in this planetary gear device is connected to the ring gear 2 in the other planetary gear device.
2, and these carriers and ring gears are connected to an output shaft 24. Further, a multi-disc brake 2 is provided between the carrier 20 and the transmission case 14 in the other planetary gear device.
5 and a one-way clutch 26 are provided. A sprocket 27 is provided on the output shaft 24. The final reduction gear 30 is provided parallel to the crankshaft 2, and in this embodiment is composed of a sun gear 31, a planetary pinion 32, a ring gear 33, and a carrier 34 that rotatably supports the planetary pinion. A sprocket 36 is provided on the input shaft 35 of the final reduction gear 30, and a chain 37 is provided between the sprocket 27 and the sprocket 36. Further, the input shaft 35 is connected to the ring gear 33. Sun gear 31 is transmission case 14
The carrier 34 is connected to the shaft 4 of the differential 40.
1. According to this configuration, the reduction ratio of the final reduction gear 30 is the sun gear 31 and the ring gear 33.
It can be set in the range of 1 to 2 depending on the ratio of the number of teeth. The differential device 40 is of a well-known type, and left and right axle shafts 42 and 43 are coupled to left and right front wheels (not shown). Pinion 4 meshing with side gears 44 and 45
A shaft 71 that rotatably supports 6 and 47 is connected to the carrier 34. Next, Table 1 shows the gear shifting conditions and the operating conditions of the clutch and brake.

[Table] In Table 1, the ○ mark indicates that each clutch and brake are in the engaged state, the x mark indicates that they are in the released state, the △ mark indicates that the one-way clutch is in the locked state, and the ▽ mark indicates that the one-way clutch is in the locked state. indicates that it is in the state of Engagement and release of each clutch and brake is controlled by hydraulic pressure from a hydraulic control system (not shown) to a corresponding hydraulic servo (not shown). Next, the operation of each gear will be explained. [First forward speed] The clutch 23, brake 25 and one-way clutch 26 are operating. Power from the crankshaft 2 is transmitted to the input shaft 11 via the torque converter 3, and then to the ring gear 19 via the clutch 23. At this time, the carrier 20 is transmitted with rotation in the opposite direction to the input shaft 11, but the one-way clutch 2
6, the ring gear 22 rotates in the same direction as the input shaft 11, causing a sprocket 27 connected to the ring gear 22 to rotate. At the same time, the carrier 17 also rotates in the same direction, rotating the sprocket 27, and the combined rotational force is transmitted to the sprocket 27. Sprocket 27 connects to sprocket 36 via chain 37.
, and the input shaft 35 of the final reduction gear 30 is rotated. Then, the ring gear 33 connected to the input shaft 35 rotates, and since the sun gear 31 is fixed, the rotation is transmitted to the carrier 34, and the rotational force is transmitted to the left and right axle shafts 42, 43 via the differential device 40. It will be done. Note that when it is desired to apply engine braking, such as when traveling downhill, the one-way clutch alone will allow the carrier 20 to rotate, so the brake 25 is activated to restrain the rotation of the carrier 20. [Second forward speed] The clutch 23 and brake 15 are operating.
Power from the crankshaft 2 is transmitted to the ring gear 19 of the transmission 10 in the same manner as in the case of the first forward speed. At this time, rotation in the opposite direction to the ring gear 19 is transmitted to the sun gear 16, but its rotation is restrained by the operation of the brake 15, so the planetary pinion 18 comes to rotate in the same direction as the ring gear 19, and as a result, the carrier It rotates in the same direction and is transmitted to the output shaft 24, and thereafter to the left and right axle shafts 42, 43 in the same manner as in the case of the first forward speed. [Third forward speed] Clutches 13 and 23 are operating. Power from the crankshaft 2 is transmitted to the input shaft 11 via the torque converter 3. Rotation of input shaft 11 is transmitted to sun gear 16 and ring gear 19 via clutches 13 and 23. Therefore, in the planetary gear mechanism, when the ring gear 19 and the sun gear 16 rotate in the same direction, the planetary pinion 18 rotates integrally with the ring gear 19 and the sun gear 16 without relative movement, and the rotation is transmitted to the carrier 17, and the output shaft 24 is rotated. The left and right axle shafts 42,
43 will be informed. [Reverse] Clutch 13 and brake 25 are operating.
Power from the crankshaft 2 is transmitted to the input shaft 11 via the torque converter 3, and then to the sun gear 16 via the clutch 13. At this time, since the carrier 20 is fixed by the operation of the brake 25, the ring gear 22 is rotated by the sun gear 16 via the planetary pinion 21 in the opposite direction to the rotation of the input shaft 11, and the output shaft 24 is rotated. It is transmitted to the left and right axle shafts 42 and 43 in the same manner as in the case of each forward gear. FIG. 2 shows another embodiment of the present invention, in which the same reference numerals as in FIG. 1 indicate the same functional parts. In this example, the input shaft 35 of the final reduction gear 30 is connected to the sun gear 31, and the ring gear 33 is fixed to the transmission case 14. According to this configuration, the reduction ratio of the final reduction gear 30 can be set in a range greater than 2 depending on the tooth number ratio of the sun gear 31 and the ring gear 33. As described above, according to the present invention, the output shaft of the transmission and the input shaft of the final reduction gear arranged parallel to the output shaft are connected by a chain, and the final reduction is performed between the chain and the differential gear. Since the final reduction gear is installed coaxially with the differential gear, there is no need to particularly increase the rigidity of the chain, and a compact and easy-to-assemble automobile drive system can be obtained. Furthermore, since the chain is provided on the same side of the transmission as the hydraulic torque converter, the differential can be placed near the center of the vehicle.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a motor vehicle drive system showing an embodiment of the present invention, and FIG. 2 is a schematic diagram of a motor vehicle drive system showing another embodiment of the invention. (In the diagram), 1... Engine, 2... Crankshaft, 3
...Hydraulic torque converter, 4...Pump impeller, 5...One-way clutch, 6...Fixed part,
7... Stator, 8... Turbine runner, 10...
...Transmission device, 11...Input shaft of transmission device, 12...
...Sun gear shaft, 13...Multi-plate clutch, 14...
Transmission case, 15...Multi-plate brake, 16...Sun gear, 17...Carrier, 18
...Planetary pinion, 19...Ring gear 1
9, 20...Carrier, 21...Planetary pinion, 27...First sprocket, 30...Final reduction gear, 36...Second sprocket, 37...
...Chain, 40...Differential device, 42...Axle shaft, 43...Axle shaft.

Claims (1)

[Scope of Claims] 1. A hydraulic torque converter disposed coaxially with respect to the output shaft of an engine placed laterally with respect to the vehicle body; and a hydraulic torque converter coaxially connected to the hydraulic torque converter. A transmission including at least one planetary gear mechanism and a plurality of frictional engagement elements and having a plurality of forward speeds and reverse speeds, and a planetary gear transmission mechanism provided parallel to the axial direction of the transmission. a first sprocket provided on the output shaft of the transmission; and a second sprocket provided on the input shaft of the final reduction gear.
sprocket, a chain provided between the two sprockets, and a differential device that transmits power from the output shaft of the final reduction gear to left and right axle shafts, and the transmission device includes the chain and the fluid type The torque converter is disposed on the opposite side of the engine, the final reduction gear and the differential are disposed on the same side of the chain as the engine, and the final reduction gear is located on the opposite side of the chain and the differential. An automobile drive device characterized in that it is disposed between. 2. The final reduction gear includes a sun gear, a carrier,
It is composed of a planetary gear mechanism consisting of a planetary pinion supported by the carrier and a ring gear, the ring gear being connected to the input shaft of the final reduction gear, the sun gear being fixed, and the carrier being connected to the input shaft of the differential gear. 2. A drive device for an automobile according to claim 1, wherein the drive device is connected to a drive device. 3. The final reduction gear includes a sun gear, a carrier,
It is composed of a planetary gear mechanism consisting of a planetary pinion supported by the carrier and a ring gear, the sun gear is connected to the input shaft of the final reduction gear, the ring gear is fixed, and the carrier is connected to the input shaft of the differential gear. 2. A drive device for an automobile according to claim 1, wherein the drive device is connected to a drive device.