JPH0680345B2 - Vehicle transmission - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle transmission, and mainly to a transmission mechanism lubrication device of a lubricating oil supply device.

[Prior Art] As a vehicle transmission provided with a transmission mechanism for drivingly connecting two parallel shafts, for example, an input shaft, a first output shaft which is one output shaft of the transmission mechanism, the input shaft and the first output shaft. The transmission mechanism arranged between one output shaft and the other transmission mechanism connected to the first output shaft via the two-wheel / four-wheel switching mechanism or the differential gear mechanism and fitted on the first output shaft. A hollow transmission shaft that is an output shaft, and a second transmission shaft that is connected to the hollow transmission shaft through a transmission mechanism.
There is a four-wheel drive transmission including an output shaft and a transmission mechanism case accommodating a transmission mechanism. As a transmission mechanism, there is a first sprocket spline-fitted to a hollow transmission shaft, and a first transmission connected to a second output shaft. Two sprockets, a chain composed of a first sprocket and a chain driven by a second sprocket, or a first gear spline-fitted to a hollow transmission shaft, and a second gear connected to a second output shaft. And an intermediate gear that meshes with the first gear and the second gear. In addition, since a large amount of lubricating oil accumulates in the transmission mechanism chamber that is partitioned by the transmission mechanism case, the transmission mechanism agitates unnecessary oil, which reduces the transmission efficiency and deteriorates the oil due to an increase in the oil temperature due to the agitation of the oil. An oil seal was arranged between the transmission mechanism case and the hollow transmission shaft to separate it from the other chambers. Therefore, an oil passage is formed in the first output shaft to supply lubricating oil to the rear part of the auxiliary transmission, and the oil drained to the rear part of the auxiliary transmission bypasses the transmission mechanism chamber so as to smoothly return to the oil sump. There was an oil passage (Shokai Sho 55-173758).

[Problems to be Solved by the Invention] In the conventional four-wheel drive auxiliary transmission having the above-described configuration, since the connection between the first sprocket and the hollow transmission shaft is performed by spline fitting, the spline fitting portion is In order to supply the lubricating oil to the hollow transmission shaft and the first output shaft, a hole is formed to connect the first output shaft, the oil passage and the spline fitting portion to each other. Oil leaked into the transmission mechanism chamber and the amount of lubricating oil in the transmission mechanism could not be maintained properly. For this reason, since the lubricating oil could not be supplied to the spline fitting portion, fretting wear may occur in the spline fitting portion, resulting in a decrease in durability. Since the first sprocket rattles, the durability of the transmission mechanism may deteriorate.

According to the present invention, the transmission mechanism case is separated from other cases, and lubricating oil is supplied to the output shaft of the transmission mechanism and the spline fitting portion of the first rotating member to prevent deterioration of durability of the spline fitting portion. The purpose of the present invention is to provide a transmission for a vehicle.

[Means for Solving Problems] A vehicle transmission according to the present invention includes a transmission mechanism, an input shaft of the transmission mechanism, an output shaft of the transmission mechanism, and a spline fitting around the output shaft of the transmission mechanism. A first rotating member that is fitted together and has an overhanging portion in both axial directions; a second rotating member that is connected to the first rotating member via a transmission member; and a second rotating member that is connected to the second rotating member. An output shaft arranged in parallel with the output shaft of the speed change mechanism; a transmission mechanism case accommodating the first rotating member, the second rotating member, and a transmission member; and a transmission mechanism case and an overhanging portion of the first rotating member. An oil seal that is disposed between the case and the transmission mechanism case to separate the case from another case, a lubricating oil generating mechanism, and a lubricating oil passage that communicates with the lubricating oil generating mechanism,
The lubricating oil passage is formed of an oil passage formed in the output shaft of the speed change mechanism so as to connect the spline fitting portion of the first rotating member.

[Operations and Effects of the Invention] With the above-described configuration, the vehicle transmission of the present invention has the following operations and effects.

A lubricating oil generating mechanism, a lubricating oil passage communicating with the lubricating oil generating mechanism, and an oil passage formed on the output shaft of the speed change mechanism communicating the lubricating oil passage with the spline fitting portion of the first rotating member are provided. The lubricating oil is supplied from the lubricating oil generation mechanism to the spline fitting portion between the output shaft of the speed change mechanism and the first rotating member via the lubricating oil passage and the oil passage formed on the output shaft of the speed change mechanism. It is possible to lubricate the spline fitting portion between the output shaft of the transmission mechanism and the first rotating member. Further, since the overhanging portion is formed in both axial directions of the first rotating member and the oil seal between the overhanging portion and the transmission mechanism case is provided to separate the inside of the transmission mechanism case from the other case, the spline fitting is performed. It is possible to prevent the lubricating oil supplied to the joint portion from leaking into the transmission mechanism case. As a result, the amount of lubricating oil in the transmission mechanism case can be properly maintained and fretting wear of the spline fitting portion can be prevented, so that the durability of the spline fitting portion can be improved.

[Embodiment] A vehicle transmission of the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 shows a four-wheel drive transmission, and a vehicle transmission 1A of the present invention is applied to a four-wheel drive transfer 40.

The four-wheel drive transmission 1 includes a four-speed automatic transmission 10 with an overdrive which is a first transmission, and a second transmission connected to an output shaft 32 of a planetary gear transmission of the four-speed automatic transmission 10. The four-wheel drive transfer 40, the lubricating oil supply mechanism 70, and the automatic transmission case 2 are included.

The automatic transmission case 2 is a transfer case including a torque converter housing 2A accommodating a fluid torque converter T, a transmission case 2B, an extension case 3a, a front transmission mechanism case 3b, a rear transmission mechanism case 3c, and an extension housing 3d. With 2C.

The 4-speed automatic transmission 10 includes a fluid type torque converter T, an overdrive mechanism OD, and an underdrive mechanism UD having three forward gears and one reverse gear.

The torque converter T is a pump provided in the torque converter chamber 4a and connected to an output shaft of an engine (not shown).
11, a turbine 13 connected to the output shaft 12 of the torque converter T, a stator 15 connected to a fixed portion via a one-way clutch 14, and a direct connection clutch 16, and the output shaft 12 of the torque converter T is overdriven. It is the input shaft of the mechanism OD.

The overdrive mechanism OD is located in the overdrive mechanism chamber 4b.
The multi-plate clutch C0, the multi-plate brake B0, and the one-way clutch F0 that are friction engagement elements, and the components are fixed to a fixed member such as a transmission case by selective engagement of these friction engagement elements. Or a planetary gear set P0 which is connected to the input shaft, the output shaft, or other components or which is fixed or disconnected.

The planetary gear set P0 includes a carrier 21 connected to the input shaft (12), a ring gear 22 connected to the output shaft 25 of the overdrive mechanism OD, and a brake B0 rotatably fitted on the input shaft 12 via a brake B0. Transmission case 2B
Fixed to the sun gear 23 connected to the carrier 21 via a clutch C0 and a one-way clutch F0 parallel to the clutch C0, and rotatably supported by the carrier 21 and the sun gear 23 and the ring gear. It consists of a planetary carrier 24 meshed with 22.

The output shaft 25 of the overdrive mechanism OD also serves as the input shaft of the underdrive mechanism UD, which has three forward stages and one reverse stage.

Underdrive mechanism UD is underdrive mechanism room 4c
And a multi-disc clutch C1 which is a friction engagement element and
C2, belt brake B1, multi-disc brakes B2 and B3,
It consists of one-way clutches F1 and F2, a front planetary gear set P1, and a rear planetary gear set P2.

The front planetary gear set P1 includes a ring gear 31 connected to the input shaft (25) via a clutch C1, and a carrier 33 connected to an output shaft 32 of the underdrive mechanism UD.
It is connected to the input shaft (25) via a clutch C2 and fixed to the transmission case 2B via a belt brake B1, a brake B2 in parallel with the belt brake B1 and a one-way clutch F1 in series with the brake B2. And a planetary pinion 35 that is rotatably supported by the carrier 33 and meshes with the sun gear 34 and the ring gear 31.

The rear planetary gear set P2 is integrated with the sun gear shaft 30 together with the carrier 36 fixed to the transmission case 2B via the brake B3 and the one-way clutch F2 parallel to the brake B3, and the sun gear 34 of the front planetary gear set P1. Specifically formed sun gear 37, a ring gear 38 connected to the output shaft 32, and a planetary pinion 39 rotatably supported by the carrier 36 and meshed with the sun gear 37 and the ring gear 38.

The 4-speed automatic transmission 10 has an oil strainer 10d inside a valve body 10c built in an oil pan 10b fastened by a bolt 10a at the lower part of a transmission case 2B according to the vehicle running conditions such as vehicle speed and throttle opening. From the hydraulic control device 10A to the hydraulic servo B-0 of each friction engagement device,
(B-1 not shown), B-2, B-3, C-0, C-
1 and C-2 selectively output hydraulic pressure to each clutch
C0, C1, C2 and brakes B0, B1, B2, B3 are engaged or released to perform four forward gear shifts or one reverse gear shift. Table 1 shows an example of the operation of each of the clutches C0, C1, C2, the brakes B0, B1, B2, B3, the one-way clutches F0, F1, F2 and the achieved shift speed (range).

In Table 1, E indicates that the corresponding clutch, brake, and one-way clutch are engaged. (L) indicates that the corresponding one-way clutch is engaged only in the engine drive state and is not engaged in the engine brake state. Further, L has a corresponding one-way clutch engaged in the engine drive state, but the engagement is not necessarily required because the transmission of power is guaranteed by a clutch or a brake installed in parallel therewith ( Lock). Further, f indicates that the corresponding one-way clutch is free. Furthermore, an X indicates that the corresponding clutch and brake are released.

The transfer case 2C that houses the transfer 40 includes a front chamber 4d that houses a vehicle speed sensor 67, a clutch C3 that is a high-speed gear friction engagement device, a brake B4 that is a low-speed gear friction engagement device, and the input shaft. Transmission mechanism UD1 consisting of a planetary gear set P3 arranged between (32) and the first output shaft 42
, A two-wheel / four-wheel switching mechanism 4f, which houses a clutch C4, which is a two-wheel / four-wheel switching mechanism, and an output shaft 32 of the planetary gear set P2, P3, as input shafts. The first output shaft 42 of the transfer 40, which is one output shaft of the speed change mechanism UD1 arranged in series with the (32), is rotatably fitted onto the first output shaft 42, and in this embodiment, the clutch C4.
The sleeve 5 that is drivingly connected to the first output shaft 42 via the shaft 5 is the other output shaft of the speed change mechanism UD1 and the hollow transmission shaft.
1. A second output shaft 52 installed in parallel with the input shaft (32) and mounted in the opposite direction to the first output shaft 42, and a transmission mechanism 53 between the sleeve 52 and the second output shaft 52. And a rear chamber 4h accommodating a speedometer drive gear 68.

The planetary gear set P3 includes a sun gear 44 spline-fitted to the end of the input shaft (32), a planetary pinion 45 that meshes with the sun gear 44, a ring gear 46 that meshes with the planetary pinion 45, and the planetary pinion 45. And a first output shaft of the transfer 40.
It consists of a carrier 47 connected to the tip of 42.

Brake B4 has ring gear 46 extension case 3a
Is a multi-plate friction brake for engaging with a low speed gear hydraulic servo B-4 (hereinafter referred to as a hydraulic servo B-4 (hereinafter referred to as a low pressure stage hydraulic servo B-4, which includes a cylinder 49 formed in the extension case 3a and a piston 49P mounted in the cylinder 49 Hydraulic servo B-4)
Is operated by.

Clutch C3 is a planetary gear set P3 4-speed automatic transmission
A high speed stage hydraulic servo which is arranged on the 10 side and connects and disconnects the sun gear 44 and the carrier 47 and is composed of a cylinder 50 connected to the carrier 47 and a piston 50P mounted in the cylinder 50. C-3 (hereinafter hydraulic servo C-3
And)).

The clutch C4 is a transmission mechanism 53 for driving the first output shaft 42 connected to the carrier 47 and the second output shaft 52 of the transfer 40.
Is a multi-plate friction clutch for connecting and disconnecting a sleeve 51 connected to one sprocket 56, and is composed of a cylinder 58 spline-fitted to the first output shaft 42 and a piston 58P mounted in the cylinder 58. Hydraulic Servo C-4
Is operated by.

The transmission mechanism 53 is a first spline-fitted sleeve 51.
It comprises a sprocket 56 which is a rotating member, a sprocket 55 which is a second rotating member formed on the second output shaft 52, and a chain 57 which is a transmission member stretched between these sprockets.

A parking gear 59 is provided around the outer circumference of the cylinder 50 of the hydraulic servo C-3. When the shift lever of the 4-speed automatic transmission 10 is selected at the parking position, the pawl 59a meshes with the parking gear 59. The output shaft 42 is fixed.

61 is clutches C3, C4 and brake B4 of transfer 40
Valve body of a hydraulic control device 63 for supplying and discharging hydraulic pressure to and from the hydraulic servos C-3, C-4 and B-4, 62 is a hydraulic control device
63 oil pans. Clutch C3, C4 and brake
The hydraulic pressure supplied to the hydraulic servos C-3, C-4 and B-4 of B4 is the oil passage 63 formed in the transmission case 2B and the extension case 3a from the oil pan 10b.
Guided through the hydraulic control device 63 via a and 63b.

A lubricating oil supply mechanism that supplies lubricating oil to the transfer 40
The oil 70 is pumped from the oil pan 10b of the 4-speed automatic transmission 10 by an oil pump 71 which is a lubricating oil generation mechanism, adjusted to a constant pressure, and formed in the input shaft (25) through an oil passage 72a. Is supplied to the passage 72b and is supplied to the oil passage 72d formed in the first output shaft 42 via the oil passage 72c formed in the input shaft (32) connected to the oil passage 72b, 72c, 72d
Oil passages 73a, 73b, 73c, 73d, 73e, 73f, 73 connected to
g, 73h, 73i, 73j, thrust bearings S1, S2,
S3, S4, each bush b1, b2, b3 and planetary gear set P3 and clutches C3, C4, brake B4 is supplied and lubricated, further oil passages 74a, 7 provided in the sleeve 51
The oil is supplied to the spline fitting portion 77 between the sleeve 51 and the sprocket 56 via the ball bearing 74, the bearing 75, and the oil passage 76 provided in the sleeve 51 via 4b and 74c for lubrication. At this time, since the oil seal 78 is arranged between the overhanging portion of the sprocket 56 and the front transmission mechanism case 3b and the rear transmission mechanism case, the lubricating oil supplied to the spline fitting portion 77 is stored in the transmission mechanism chamber 4g. The amount of lubricating oil in the transmission mechanism chamber 4g can be properly maintained without leaking into the.

Table 2 shows the setting range of the manual shift of the transfer 40, the engagement and release of the brake B4, the clutches C3 and C4, and the running state of the vehicle.

In Table 3, ∘ indicates the engaged state of the friction engagement element, and × indicates the released state. The reduction ratio (3.0 in the example) was calculated by the reduction ratio = (1 + λ) /λ=3.0 when the tooth number ratio of the sun gear 44 and the ring gear 46 of the planetary gear mechanism is λ and the tooth number ratio λ is 0.5. It is a thing.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a four-wheel drive transmission to which the vehicle transmission of the present invention is applied, and FIG. 2 is an enlarged view of a main part of FIG. In the figure, 1 ... four-wheel drive transmission, UD1 ... transmission mechanism, 32 ... transmission mechanism input shaft (planetary gear set P2, P3 output shaft), 42 ... transmission mechanism output shaft (first output shaft), 52 ... Output shaft (second output shaft), 51 ... Output shaft of transmission mechanism (hollow transmission shaft, sleeve), 56 ... First rotating member (sprocket),
55 ... Second rotating member (sprocket), 57 ... Transmission member (chain), 78 ... Oil seal, 71 ... Lubricating oil generating mechanism (oil pump), 72a, 72b, 72c, 72d ... Lubricating oil passage, 76 ... Oil passage , 4g ... Transmission mechanism chamber, 10 ... 4-speed automatic transmission (first transmission), 40 ... Transfer (second transmission), 70 ... Lubricating oil supply device, 3b ... Transmission mechanism case (front transmission mechanism case) ,
3c… Transmission mechanism case (rear transmission mechanism case)

Front Page Continuation (72) Inventor Fukumura Kagenori, Toyota City, Toyota City, Aichi Prefecture 1 Toyota Motor Co., Ltd. (72) Inventor, Seiichi Nishikawa 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (56) References Japanese Unexamined Patent Publication No. Sho 57-66020 (JP, A) Actual exploitation No. Sho 50-113776 (JP, U)

Claims (4)

[Claims] 1. A speed change mechanism, an input shaft of the speed change mechanism, an output shaft of the speed change mechanism, and a spline fit around the output shaft of the speed change mechanism, and an overhang portion is formed in both axial directions. A first rotating member, a second rotating member connected to the first rotating member via a transmission member, an output shaft connected to the second rotating member and arranged in parallel with an output shaft of the speed change mechanism, A transmission mechanism case that accommodates the first rotating member, the second rotating member, and the transmission member, and the transmission mechanism case and the other case that are arranged between the transmission mechanism case and the overhanging portion of the first rotating member. An oil seal for partitioning the interior, a lubricating oil generating mechanism, a lubricating oil passage communicating with the lubricating oil generating mechanism, and a lubricating oil passage for communicating the lubricating oil passage with the spline fitting portion of the first rotating member. A vehicle transmission including an oil passage formed on an output shaft of a transmission mechanism. 2. The first rotating member and the second rotating member are sprockets for driving a chain which is the transmission member, and the transmission mechanism is constituted by these chains and sprockets. The vehicle transmission according to item 1. 3. The output shaft of the speed change mechanism includes a first output shaft of the transmission and a hollow transmission shaft that is externally fitted to the first output shaft and is drivingly connected to the first output shaft. The vehicle transmission according to claim 1, wherein the shaft is a second output shaft of the transmission, and the first rotating member is spline-fitted on the outer periphery of the hollow transmission shaft. 4. The transmission according to claim 3, wherein the hollow transmission shaft is drivingly connected to the first output shaft via a clutch.