JPS61167771A - Transmission for vehicle - Google Patents

Abstract

PURPOSE:To prevent a spline fitted part from deteriorating its durability by providing an oil seal between projecting parts on the first rotational member of a transmission mechanism and a case, and also a lubricating oil generating mechanism, and oil paths formed on a hollow transmission shaft. CONSTITUTION:Projecting parts are formed axially on both the shaft ends of the first rotational member 56 of a transmission mechanism 53, and provided with a lubricating oil generating mechanism 70 and lubricating oil paths 72a-72d. Oil paths 74a-74c are formed on a hollow transmission shaft 51 to communicate the lubricating oil paths to the spline fitted part 77 of the first rotational member 56. The lubricating oil can be therefore fed to the spline fitted part between the hollow transmission shaft 51 and the first rotational member 56 to improve the durability of the spline fitted part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a vehicle transmission, and mainly relates to a transmission of a lubricating oil supply device! It is related to the JI mechanism f1 sliding device.

[Prior Art] As a vehicle transmission equipped with a transmission mechanism that drives and connects two shafts arranged in parallel, for example, an input shaft, a first output shaft that is one output shaft of the transmission mechanism, and an input shaft and a first output shaft are connected to each other. A transmission mechanism arranged behind the first output shaft, and the other transmission mechanism connected to the first output shaft via a two-wheel/four-wheel switching mechanism or a differential gear mechanism and fitted externally to the first output shaft. A hollow power transmission shaft which is an output shaft, and a second shaft connected to the hollow power transmission shaft through a transmission mechanism.
There is a four-wheel drive transmission consisting of an output shaft and a transmission mechanism case housing a transmission mechanism, and the transmission mechanism includes a first sprocket spline-fitted to a hollow transmission shaft, and a second sprocket connected to a second output shaft. A gear consisting of two sprockets and a chain driven by the first sprocket and the 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. Matataden! A large amount of lubricating oil accumulates in the transmission mechanism chamber partitioned into the J mechanism case, causing the transmission mechanism to agitate unnecessary oil, reducing transmission efficiency, and increasing oil temperature due to oil agitation, causing oil deterioration. An oil seal was placed between the transmission mechanism case and the hollow transmission shaft to separate it from the chamber. For this reason, an oil passage is formed on the first output shaft to supply lubricating oil to the rear of the sub-transmission, and the oil that drains to the rear of the sub-transmission bypasses the transmission mechanism chamber so that it can smoothly return to the oil reservoir. (Utility Model Application No. 55-173758).

[Problems to be Solved by the Invention] In the conventional four-wheel drive sub-transmission having the above configuration, the first sprocket and the hollow power transmission shaft are connected by spline fitting. In order to supply lubricating oil to the spline fitting part, holes are formed in the hollow transmission shaft and the first output shaft to communicate the oil passage of the first output shaft with the spline fitting part. Oil leaked into the transmission mechanism chamber, making it impossible to maintain an appropriate amount of lubricating oil in the transmission mechanism. For this reason, lubricating oil could not be supplied to the spline fitting portion, so fretting wear may occur in the spline fitting portion, which may reduce durability. The 1st Sub D gets rattled! There is a possibility that the durability of the III structure will be reduced.

The present invention provides a vehicle in which a transmission mechanism case is separated from other cases, and lubricating oil is supplied to a spline fitting part of a hollow transmission shaft and a first rotating member to prevent a decrease in durability of the spline fitting part. The purpose is to provide transmissions for

Means for Solving Problem E] The vehicle transmission of 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 on the outer periphery of the output shaft of the transmission mechanism. a first rotating member that is fitted together and has projecting portions in both axial directions; a second rotating member that is connected to the first rotating member via a transmission member; an output shaft parallel to the output shaft of the transmission mechanism; a transmission mechanism case that houses the first rotating member, the second rotating member, and the transmission member; the transmission mechanism case and the first transmission mechanism;
An oil seal disposed between an overhang of the rotating member and separating the inside of the transmission mechanism case from the inside of another case, a lubricating oil generating mechanism, and a lubricating oil path communicating with the lubricating oil generating mechanism. , an oil passage formed in the output shaft of the transmission mechanism so as to communicate the 11 oil passage with the spline fitting portion of the first rotating member.

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

forming an overhang in both axial directions on the first rotating member of the transmission mechanism;
An oil seal is disposed between the projecting portion and the transmission mechanism case to separate the inside of the transmission mechanism case from the inside of the case, and a lubricating oil generating mechanism and a lubricating oil passage communicating with the lubricating oil generating mechanism. and an oil passage formed in the hollow transmission shaft so as to communicate the lubricating oil passage with the spline fitting part of the first rotating part, thereby preventing lubricating oil from leaking into the transmission mechanism case. At the same time, it is possible to supply lubricating oil to the spline fitting part between the hollow transmission shaft and the first rotating member, and it is possible to maintain the amount of lubricant in the transmission mechanism case and prevent fretting wear on the spline fitting part. The durability of the fitting part can be improved.

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

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

Shift I for 4 wheel drive! 11 is a 4-speed automatic transmission with overdrive 10 which is a first transmission, and the 4-speed automatic transmission 11
The automatic transmission case 2 includes a four-wheel drive transfer 40, which is a second transmission connected to the output shaft 32 of a planetary gear transmission, a lubricating oil supply mechanism 70, and an automatic transmission case 2.

The automatic transmission case 2 includes a torque converter housing 2A that houses a hydraulic torque converter T, a transmission case 2B, an extension case 3a,
The transfer case 2C includes a front transmission mechanism case 3b, a rear transmission mechanism case 3C, and an extension housing 3d.

The 4-speed automatic transmission 1io includes a hydraulic torque converter ■, an overdrive mechanism OD, and an underdrive mechanism UD with three forward speeds and one reverse speed.

The torque converter T is provided in a torque converter chamber 4a, and is connected to a pump 11 connected to an output shaft of an engine (not shown), a turbine 13 connected to an output shaft 12 of the torque converter T, and a one-way clutch 14. It consists of a stator 15 connected to a fixed part and a direct coupling clutch 16, and the output shaft 12 of the torque converter T serves as the input shaft of the overdrive mechanism OD.
, the overdrive mechanism OD is housed in the overdrive mechanism v4b, and is configured by a multi-disc clutch Go, a multi-disc brake BO, and a one-way latch FO, which are frictional engagement elements, and selective engagement of these frictional engagement elements. It consists of a planetary gear set Po whose elements are fixed to a fixed member such as a transmission case, or connected to an input shaft, an output shaft, or other components, or these fixings or connections are released.

The planetary gear set PO 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 the input @12.
The clutch Co
and a one-way latch FO parallel to the clutch CO.
a sun gear 23 connected to the carrier 21 via;
and a planetary pinion 24 rotatably supported by the Kirelia 21 and meshed with the sun gear 23 and ring gear 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.

The underdrive mechanism LJD is housed in the underdrive mechanism chamber 4C, and includes a multi-disc clutch C that is a frictional engagement element.
1 and C2, belt brake B1, multi-disc brake B
2 and B3, 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,
A carrier 33 connected to the output shaft 32 of the underdrive mechanism tJD and the input shaft (2
5) and is fixed to the transmission case 2B via a belt brake B1, a brake B2 parallel to the belt brake B1, and a one-way latch F1 connected in series with the brake B2;
It is rotatably supported by the carrier 33 and includes a sun gear 34 and a planetary pinion 35 meshed with the ring gear 31.

The rear planetary gear set P2 is integrated with the sun gear shaft 30 together with a carrier 36 fixed to the transmission case 2B via a brake B3 and a one-sided clutch F2 arranged in parallel with the brake B3, and a sun gear 34 of the front planetary gear set P1. a sun gear 37 formed as shown in FIG.
Rotatably supported by carrier 36 and sun gear 3
7 and a planetary pinion 39 meshed with a ring gear 38.

The 4-speed automatic transmission 8110 is configured to change the oil pan 10b fastened to the lower part of the transmission case 2B by bolts 10a depending on the driving conditions of the vehicle such as vehicle speed and throttle opening.
From the hydraulic control device 10A having an oil strainer 10d in the valve body 10c built into the hydraulic servo B-o of each frictional engagement device, (B-1 not shown), B-2,
The hydraulic pressure selectively output to B-3, C-0, C-1, and C-2 engages or disengages each clutch C01C1, C2 and brakes BO1B1.82, B3,
It is designed to perform four forward gear shifts or one reverse gear shift. Each clutch C01C1, C2, brake BO1
Table 1 shows examples of the gear positions (ranges) achieved by the operation of B1, B2, B3, one-way clutches FO1, F1, F2.

Table 1 In Table 1, E indicates that the corresponding clutch, brake, or one-way clutch is engaged.

(L) indicates that the corresponding one-sided clutch is engaged only in the engine drive state and is not engaged in the engine brake state. Furthermore, although the corresponding one-sided clutch of L is engaged in the engine drive state, this engagement is not necessarily required because the power transmission is guaranteed by the clutch or brake built in parallel. (lock). Roughly f indicates that the corresponding one-sided clutch is free. Further, an x indicates that the corresponding clutch and brake are released.

The transfer case 2C that houses the transfer 40 has a front chamber 4d that houses the 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 aforementioned components. A planetary gear set P arranged between the input shaft (32) and the first output shaft 42
A transmission mechanism chamber 4e that houses a transmission mechanism UD1 consisting of three wheels, a two-wheel/four-wheel switching mechanism chamber 4f that houses a clutch C4 that is a two-wheel/four-wheel switching mechanism, and a planetary gear set P.
2, the output shaft 32 of P3 is used as the input shaft, and the input shaft (32
) The first output shaft 42 of the transfer 40, which is one output shaft of the transmission mechanism tJD1 arranged in series in the A sleeve 51 is drive-coupled with the first output shaft 42 and serves as an output shaft for use of the transmission mechanism tJD1, as well as a hollow transmission shaft. A transmission mechanism chamber 4g housing a second output shaft 52 mounted in the opposite direction, a transmission mechanism 53 between the sleeve 51 and the second output shaft 52, and a rear gear 4h housing a speedometer drive gear 68. have

The planetary gear set P3 includes a sun gear 44 spline-fitted to the end of the input shaft (32), a planetary binion 45 that meshes with the sun gear 44, a ring gear 46 that meshes with the planetary binion 45, and a planetary gear 46 that meshes with the planetary binion 45. A carrier 4 rotatably holds the binion 45 and is connected to the tip of the first output shaft 42 of the transfer 40.
Consists of 7.

The brake B4 is a multi-plate friction brake for engaging the ring gear 46 with the extension case 3a, and is a cylinder 49 formed inside the extension case 3a.
It is operated by a low speed stage hydraulic servo B-4 (hereinafter referred to as hydraulic servo B-4), which is composed of a piston 49P mounted in the cylinder 49.

Clutch C3 is disposed on the 4-speed automatic transmission @10 side of planetary gear set P3, and connects and disconnects sun gear 44 and carrier 47. Clutch C3 connects and connects sun gear 44 and carrier 47 to cylinder 50, which is connected to carrier 47, and which is installed in cylinder 50. It is actuated by a high-speed stage hydraulic servo C-3 (hereinafter referred to as hydraulic servo C-3) comprising a piston 50P.

Clutch C4 is the first output connected to carrier 47
.

It is a multi-plate friction clutch for connecting and disconnecting the shaft 42 and a sleeve 51 connected to one sprocket 56 of a transmission mechanism 53 for driving the second output shaft 52 of the transfer 40, and is spline-fitted to the first output shaft 42. The combined cylinder 58 and the piston 58P installed in the cylinder 58
It is operated by a hydraulic servo C-4 consisting of.

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

A parking gear 59 is provided around the outer circumferential side of the cylinder 50 of the hydraulic servo C-3, and when the shift lever of the 4-speed automatic transmission 10 is selected to the parking position, the pawl 5
9a meshes with the parking gear 59 and fixes the first output shaft 42.

61 is a valve body of a hydraulic control device 63 that supplies and discharges hydraulic pressure to the hydraulic servos C-3, C-4 and B-4 of the clutches C3 and C4 of the transfer 40 and the brake B4; 62
is an oil pan of the hydraulic control device 63. clutch C3
, C4 and brake B4 hydraulic servo C-3, C-4
The hydraulic pressure supplied to B-4 is guided from the oil pan 10b through the hydraulic control device 63 via oil passages 63a and 63b formed in the transmission case 2B and the extension case 3a.

In addition, the lubricating oil supply mechanism 70 that supplies lubricating oil to the transfer 40 is pumped up from the oil pan 10b of the 4-speed automatic transmission 10 by an oil pump 71, which is a lubricating oil pressure generating mechanism, and the oil is adjusted to a constant pressure and flows through the oil passage 72a. The oil is supplied to the first output shaft 42 through an oil passage 72b formed in the input shaft (32) connected to the oil passage 72b. The oil passages 73a, 73b, 73c are supplied to the oil passage 72d formed in the oil passages 72c and 72d.

73d, 73e, 731.73g, 73h
Through 173i and 73j, each thrust bearing S1,
S2, S3, S4, each bush b1, b2, b3 and planetary gear set P3 and clutches C3, C4,
Oil passages 74a, 74b, 74c are supplied to the brake B4 for lubrication, and are provided in the sleeve 51.
through the ball bearing 74, the bearing 75, and the oil passage 16 provided in the sleeve 51 to the sleeve 51.
The lubricant is supplied to each spline fitting portion 77 of the sprocket 56 for lubrication.

Table 2 shows the setting range of the manual shift 1- of the transfer 40, the engagement and disengagement of the brake B4, the clutches C3 and C4, and the running state of the vehicle.

Table 2 In Table 3, O indicates the engaged state of the friction engagement element, and X indicates the released state. For the reduction ratio (3.0 in the example), the ratio of the number of teeth between the sun gear 44 and the ring gear 46 of the planetary gear mechanism is λ,
Reduction ratio -(1+λ)/λ when tooth ratio λ is 0,5
= 3.0.

[Brief explanation 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 the main parts of FIG. 1. In the figure 1... Four-wheel drive gear shift 8132... Input shaft 42... First output shaft 52... Second output j-axis 51
...Hollow transmission shaft (sleeve) 10...4-speed automatic transmission (first transmission) 40...Transfer (second transmission) 70...Lubricating oil supply device

Claims (1)

[Scope of Claims] 1) A transmission mechanism, an input shaft of the transmission mechanism, an output shaft of the transmission mechanism, and a spline-fitted portion on the outer periphery of the output shaft of the transmission mechanism, and a portion projecting in both axial directions. a second rotating member connected to the first rotating member via a transmission member; and an output shaft connected to the second rotating member and parallel to the output shaft of the transmission mechanism. and the first rotating member,
A transmission mechanism case that accommodates a second rotating member and a transmission member, and a transmission mechanism case that is disposed between the transmission mechanism case and the overhang of the first rotation member, and separates the inside of the transmission mechanism case from the inside of another case. a lubricating oil generating mechanism; a lubricating oil passage communicating with the lubricating oil generating mechanism; and an output shaft of the transmission mechanism connecting the lubricating oil passage and the spline fitting portion of the first rotating member. A vehicle transmission consisting of an oil passage formed in the. 2) The first rotating member and the second rotating member are sprockets that drive the chain that is the transmission member, and the chain and sprocket constitute a transmission mechanism, according to claim 1. transmission for vehicles. 3) The output shaft of the transmission mechanism includes a first output shaft of the transmission and a hollow transmission shaft that is fitted onto the first output shaft and is drivingly connected to the first output shaft, and the output shaft is 2. The vehicle transmission according to claim 1, wherein the first rotating member is a second output shaft of the transmission and is spline-fitted on the outer periphery of the hollow transmission shaft. 4) The vehicle transmission according to claim 3, wherein the hollow transmission shaft is drivingly connected to the first output shaft via a clutch.