JPS6141052A - Power transmission drum of automatic speed change gear - Google Patents

Abstract

PURPOSE:To prevent lubricating oil discharged from a planetary gear from being stirred in a power transmission drum and to prevent a rise in oil temperature by forming a lubricating oil discharge hole on the power transmission drum in the outer peripheral position for a lubricating oil flow position of a planetary gear. CONSTITUTION:A planetary gear 3 in a transmission comprises a sun gear S, a pinion gear G1 engaged with the gear S, a carrier P1 supporting the gear G1 and a ring gear R1. A power transmission drum 2 for transmitting power from a hydraulic servo drum 20 to a sun gear shaft 29 is coupled to the outer periphery of the hydraulic servo drum 20 and the sun gear shaft 29. The drum 2 comprises a front drum 2B fixed to the outer periphery of the above servo drum 20 and a rear drum 2C coupled to the sun gear shaft 29. In this case, a lubricating oil discharge hole 2A is formed on the power transmission drum 2 in the outer peripheral position for a lubricating oil discharge position 3A of the planetary gear 3 to achieve an expected object.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power transmission drum having an internal planetary gear unit in an automatic transmission.

[Prior art] The power transmission drum has a planetary gear system, a wet clutch,
A transmission mechanism necessary for shifting, such as a wet brake, is provided, and the transmission mechanism requires a constant supply of lubricating oil, so the transmission mechanism constantly releases the used lubricating oil into the surrounding area. For this reason, the power transmission drum requires a lubricant release hole to release the lubricant released from the transmission mechanism to the outside of the power transmission drum. It was installed in the middle part of the transmission drum, which was the large diameter part.

[Problems to be Solved by the Invention] In the conventional technology shown above, for example, the lubricating oil release position of the planetary gear device that releases a large amount of lubricating oil releases the lubricating oil in the power transmission drum to the outer periphery of the power transmission drum. If the lubricating oil release hole is formed axially apart from the lubricating oil releasing hole, the lubricating oil released from the lubricating oil releasing position of the planetary gear will first be transmitted to the dynamic saw at the outer peripheral position of the lubricating oil releasing position by centrifugal force. The lubricating oil released into the power transmission drum at the outer peripheral position of the lubricating oil release position flows along the inner peripheral wall of the power transmission drum to the lubricating oil release hole, It was being released from the hole to the outer circumference of the power transmission drum. For this reason, it takes a long time for the lubricating oil to flow from the outer circumferential position of the lubricating oil release position of the planetary gear device to the lubricating oil release hole, so the lubricating oil remains inside the power transmission drum for a longer period of time. The lubricating oil was agitated, causing problems such as foaming of the lubricating oil and an increase in oil temperature.

The object of the present invention is to provide a lubricant release hole in the power transmission drum at the outer periphery of the lubricant oil outflow position of the planetary gear unit, thereby eliminating the lubricant released from the lubricant outflow position of the planetary gear unit. II. To provide a power transmission drum for an automatic transmission capable of quickly releasing lubricating oil to the outer periphery of the power transmission drum through a release hole.

[Means for Solving the Problems] In order to solve the above problems, the power transmission drum of the automatic transmission according to the present invention transmits power from one side to the other side in the transmission case 1 as shown in FIG. In the automatic transmission, which has a power transmission drum 2 and a planetary gear unit 3 disposed on the inner periphery of the power transmission drum 2, the power transmission drum 2 absorbs the lubricant released from the planetary gear unit 3. The planetary gear device 3 is arranged so that the oil flows out to the outer periphery of the power transmission drum 2.
Lubricating oil release hole 2A is located on the outer periphery of the lubricating oil release position 3A.
It is assumed that the following is provided.

[Function] The function of the present invention having the above configuration is that the lubricant released from the lubricant oil outflow position 3A of the planetary gear device 3 is quickly released to the outer periphery of the power transmission drum 2 through the lubricant release hole 2A. .

[Effects of the Invention] The power transmission drum of the automatic transmission of the present invention having the above-mentioned configuration has a lubricating oil discharge hole in the power transmitting drum at the outer peripheral position of the lubricating oil outflow position of the planetary gear unit. The lubricating oil released from the lubricating oil spill position can be quickly released to the outer periphery of the power transmission drum through the lubricating oil release hole, and the lubricating oil released from the planetary gear system is agitated within the power transmission drum. It is possible to prevent the lubricating oil from foaming due to stirring and from deteriorating the performance of the lubricating oil due to a rise in oil temperature.

[Embodiment] Next, a power transmission drum of an automatic transmission according to the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a cross-sectional view showing a power transmission drum for an automatic transmission according to the present invention, and FIG. 2 is a cross-sectional view of a vehicle automatic transmission to which the power transmission drum for an automatic transmission according to the present invention is applied.

Automatic transmission 100 includes a hydraulic torque converter 200, a transmission 300, and a hydraulic control device 400.

The transmission 300 includes a first planetary gear device UO1
One multi-disc clutch C01 operated by hydraulic servo
An overdrive transmission 300A comprising one multi-disc brake BO1 and one one-way latch "0", and a second planetary gear system 3 and a second planetary gear system 32 disposed in such a power transmission drum according to the present invention. , two multi-disc clutches C1, C2 operated by hydraulic servos, one belt brake B1. Forward forward 3 with two multi-disc brakes B2, B3 and two one-way latches F1, F2.
It is comprised of an underdrive transmission 300B with one reverse gear.

The transmission case 1 of the automatic transmission 100 includes a torque converter housing 120 that accommodates a torque converter 200.
, a transmission case 130 integrally formed with a winter sky housing the overdrive transmission 300A and the underdrive transmission @ 3003, and an extension housing 14 that covers the rear side of the automatic transmission 100.
0, these torque converter housings 12
0, the transmission case 130, and the extension housing 140 are each fastened with a large number of bolts.

The torque converter 200 is housed in a torque converter housing 120 that is open at the front (engine side), and includes a front cover 201 that rotates under the drive of an engine (not shown), and a circular ring welded to the inner circumference of the front cover 201. An annular plate-shaped rear cover 202, a pump impeller 203 disposed around the inner peripheral wall of the rear cover 202, a turbine runner 204 disposed opposite to the pump impeller 203, and a turbine holding the turbine runner 204. A stator 208 is supported by a fixed shaft 207 connected to the transmission case 1 through a shell 205 and a one-way clutch 206, and increases the torque capacity when the input rotation speed is low.
, a direct coupling clutch (lock-up clutch) between the front cover 201 and the turbine shell 205 that rotates the front cover 201 and the turbine shell 205 at the same time.
It is equipped with 209. An internal gear oil pump 150 having an external gear 150a and an internal gear 150b is housed between the cylindrical transmission case 130 and the torque converter housing 120, which are continuous to the rear of the torque converter housing 120. An oil pump body 152 having a cylindrical portion 151 that protrudes forward on the inner periphery.
is fastened to the front of the transmission case 130,
Extension member 21 connected to the inner peripheral end of rear cover 202
0 is spline-fitted to the inner circumference of the external gear 150a via the inner circumference of the cylindrical portion 151. Further, an oil pump cover 154 having a cylindrical front support 153 that is coaxial with the cylindrical portion 151 and protrudes rearward is fastened to the rear side of the oil pump body 152 to connect the oil pump housing 152 and the oil pump. Cover 154 forms a partition between torque converter housing 120 and transmission case 130. Further, in the middle of the transmission case 130, there is a cylindrical wall projecting rearward that partitions an overdrive mechanism chamber 130A in which an overdrive transmission 300A is formed and an underdrive mechanism chamber 130B in which an underdrive transmission 300B is formed. An intermediate support wall 132 having a center the boat 131 is provided. A rear support wall 134 having a cylindrical rear support 133 projecting forward is provided at the rear (right side in the figure) of the transmission case 130.

Inside the front support 153 is a one-sided clutch 2 that supports the stator 208 of the torque converter 200.
A fixed shaft 207 of No. 06 is fitted, and the input shaft 10 of the transmission 300, which is the output shaft of the torque converter 200, is rotatably supported inside the fixed shaft 207. The input shaft 10 has a flange portion 101 at the rear end,
A rearward facing hole 102 is formed in the center of the rear end.

An intermediate transmission shaft 11 arranged in series with the input shaft 10 is rotatably mounted behind the input shaft 10, and the tip of the intermediate transmission shaft 11 is inserted into the hole 102 of the input shaft 10. The intermediate transmission shaft 11 has seven flange portions 111 at the rear end thereof, and a rearward hole 112 is formed in the center of which the tip of the output shaft 12 that transmits power to the driving wheels slides. The output shaft 12 has a sensor rotor 121 for detecting rotational speed and a speedometer drive gear 122 fixed in the extension housing 140, and the rear end is splined on the outer periphery to fit a sleeve yoke that transmits power to the drive wheels. Groove 1
23 is formed, and is rotatably supported by the extension housing 140 via the sleeve yoke, and its front end is rotatably supported by the hole 112 of the intermediate transmission shaft 11.

Overdrive transmission @ 300A is the input shaft 1
A first planetary gear unit UO is provided behind the sun gear SO, its ring gear RO is coupled to the intermediate transmission shaft 11 via a flange plate 113, the planetary gear rear PO is coupled to the flange portion 101 of the input shaft 10, and the sun gear SO is formed by the inner race shaft 13 of the one-way latch FO. On the front side of the first planetary gear unit UO, a first hydraulic servo drum 14 that opens rearward is fixed to an inner race shaft 13, and an annular piston 15 is installed between an outer circumferential wall 14A and an inner circumferential wall 14B of the first hydraulic servo drum 14. It is fitted to form the hydraulic servo C-0 of the clutch CO that engages and disengages the carrier PO and the first hydraulic servo drum 14, and also presses the annular piston 15 toward the inner race shaft 13 toward the hydraulic servo C-0. A clutch CO is installed inside the return spring 16 and the outer peripheral wall 14^, and the clutch C
The first hydraulic servo drum 14 and the inner race shaft 13 are connected to the carrier PO via O. A one-way latch FO with the inner race shaft 13 as an inner race is provided on the inner periphery of the first hydraulic servo drum 14, and a clutch CO and a brake BO are provided on the outer periphery between the outer race 17 and the transmission case 130. A piston 18 that presses the brake BO is fitted in front of the intermediate support wall 132 at the rear of the BO, and a hydraulic servo E3-0 for the brake BO is formed between the piston 18 and the intermediate support wall 132. A return spring 19 that presses the piston 18 toward the hydraulic servo B-0 is fitted into the inner peripheral portion 135 of the tip.

In the underdrive transmission 300B, the second hydraulic pressure υ-board drum 20 that opens rearward is connected to the intermediate receiver v13 at the front.
A clutch C is rotatably fitted on the outer periphery of the center support 131 of No. 2, and between the outer circumferential wall 20A and the inner circumferential wall 20B.
An annular piston 21 that presses the clutch C is fitted between the annular piston 21 and the second hydraulic servo drum 20.
A return spring 22 that presses the annular piston 21 toward the -2 side is formed on the inner peripheral wall 20B side, and a clutch C2 is installed inside the outer peripheral wall 20A. 2 Hydraulic servo drum 2
At the rear of 0, there is an annular protrusion 2 that opens at the rear and at the front.
A third hydraulic servo drum 24 having a
Clutch C is fixed to the outer periphery of the flange portion 111 at the rear portion of
An annular piston 25 that presses the clutch C is fitted between the annular piston 25 and the third hydraulic servo drum 24.
1 hydraulic servo C-1, an annular piston 25 on the inner circumferential side of the clutch C1, a return spring 26 that presses the hydraulic servo C-0 toward the hydraulic servo C-0, and a clutch C2 on the outer circumference of the annular protrusion 23. The second and third hydraulic servo drums 20.24 are connected via.

A second planetary gear device 3 is provided behind the third hydraulic servo drum 24 . The second planetary gear device 3 includes a sun gear S1 connected to the rear side of the descending power transmission drum 2, a pinion gear G1 meshing with the sun gear S1,
A ring gear R1 that meshes with the pinion gear G1, and a pinion shaft P that rotatably supports the pinion gear G1.
a1 and a gear carrier P1 consisting of a shaft support part pb that supports the pinion shaft Pa, and the carrier P
The shaft support part pb of 1 is connected to the power transmission drum 2 and the sun gear 31. The shaft pa is supported at the front opposite to the side of the connecting part, and the ring gear R1 is positioned at the front side of the shaft support part pb opposite to the side where the power transmission drum 2 and the lean gear S1 are connected. and is supported by a ring gear flange 27. Sun gear S of 2nd m star gear system 3
1. The lubricating oil supplied to the pinion gear G1, ring gear R1, etc. is released to the inner circumference of the ring gear R1, and since the ring gear flange 27 is disposed on the front side of the ring gear R1, the ring gear R1 The ring gear flange 27 rotatably supports the ring gear R1 on the outer periphery of the output shaft 12. The ring gear flange 27 is connected to the third hydraulic servo drum 24 through the annular protrusion 28 and the clutch C1, and is connected to the third hydraulic servo drum 24 through the clutch C1. P1 is spline-fitted to the front outer periphery of the output shaft 12, and sun gear S1 is integrally formed at the tip of a sun gear shaft 29 rotatably provided on the outer periphery of the output shaft 12. The lubricating oil release position 3A is where the lubricating oil supplied to the planetary gear device 3 from the rear end of the ring gear R1 is released to the outer periphery. 2.3 Hydraulic servo drum 20.2
4 and the second planetary gear set 3 in a minimum space, and transmits power from the servo drum 20 to the sun gear shaft 29. The power transmission drum 2 according to the present invention is shaped so as to cover the second hydraulic servo drum 20 at its front end. and the rear sun gear shaft 29 of the second planetary gear device 3.

The front end of the power transmission drum 2 is the second hydraulic servo drum 2
The front drum 2B is fixed to the outer periphery of the drum 0, and the rear end is the second drum 2B.
The power transmission drum 2 consists of a rear drum 2C connected to a sun gear shaft 29 at the rear of the star gear device 3, and the power transmission drum 2 is meshed with the front drum 2B and the rear drum 2C so as to form a gap 2D. The portion 2D releases lubricating oil within the power transmission drum 2 to the outside of the power transmission drum 2. In addition, the lubricating oil supplied to the second M star gear unit 3, which is released from the lubricating oil releasing position 3A, is distributed to the outer peripheral position of the lubricating oil releasing position 3A of the second planetary gear unit 3, which releases a large amount of lubricating oil. A sufficiently large lubricant release hole 2A is provided.
il',! The lubricating oil released from the lubricating oil releasing position 3A to the outer periphery by centrifugal force is quickly released to the outer periphery of the power transmission drum 2 via the lubricating oil releasing hole 2A. A belt brake B1 is provided on the outer peripheral side of the front drum 2 of the power transmission tram 2 for fixing and releasing the connecting drum 30.

A brake plate b2 of the brake B2 at the front and a brake plate b3 of the brake Bj at the rear are spline-fitted to a spline 136 formed on the inner periphery of the rear part of the transmission case 130. and an annular projection 31 on the front side.
A fourth hydraulic servo drum 32 is spline-fitted. An annular piston 33 that presses the brake B2 is fitted between the outer peripheral wall 32A of the fourth hydraulic servo drum 32 and the annular protrusion 31, and a hydraulic servo B-2 of the brake B2 is fitted between the annular piston 33 and the fourth hydraulic servo drum 32.
At the same time, an annular piston 33 is formed on the inner peripheral wall 32B side.
Return spring 3 that presses the servo toward the hydraulic servo B-2 side
4 is provided. Also, on the inner peripheral side of the brake B2, there is a one-way latch F that uses the sun gear shaft 29 as an inner race.
1 is provided, and a brake B is provided on the outer periphery of the outer race 35.
2 is installed. Rear support wall 1 on the rear side of brake B2
The brake B is inserted into the annular hole 36 formed between the outer circumferential side of the rear support 133 of 34 and the transmission case 130.
A plurality of pistons 371, 373 and reaction sleeve 372 are fitted to form a hydraulic servo B-3 of the brake B3, and a return spring 38 that presses the pistons 371, 373 toward the hydraulic servo B-3.
is supported by a return spring attachment 38A attached to the tip of the rear support 133. Brake B3
The inner race 39 of the one-way clutch F2 arranged on the inner circumference of the fourth hydraulic servo drum 3 is arranged on the outer circumference of the sun gear shaft 29.
2 and the outer race 4 of the one-way clutch F2
Brake B3 is attached to the outer circumference of 0. In the third planetary gear device U2, a ring gear S2 is formed integrally with a sun gear shaft 29, a carrier P2 is connected to an outer race 40 of a one-way clutch F2 on the front side, and a brake B3, and a parking gear 41 is arranged around the outer periphery. The provided ring gear R2 is connected to the output shaft 12 via a connecting member 42 whose inner circumference is spline-fitted. The parking gear 4
1 is provided so that when the shift 1 lever of the automatic transmission is selected to the parking (P) position, a parking pawl 43 engages with a parking gear 41 to fix the output shaft 12.

The transmission 300 changes the transmission case 1 according to vehicle driving conditions such as vehicle speed and throttle opening.
The engagement of each clutch and brake is controlled by hydraulic pressure selectively output to the hydraulic servo of each friction engagement device from a hydraulic control device 400 in a valve body 403 built in an oil pan 402 fastened to the lower part of the valve 30 by a bolt 401. The gears are engaged or released, resulting in four forward speeds or one reverse speed change. The operation of each clutch, brake, and one-way clutch and the gear position (RANGE) achieved
- Examples are shown in Table 1.

Table 1 In Table 1, E indicates that the corresponding clutch or brake is engaged, and × indicates that the corresponding clutch or brake is disengaged.

[Although the corresponding one-way clutch 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 with it ( lock). (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. Furthermore, f indicates that the corresponding one-way clutch is free.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a power transmission drum of an automatic transmission according to the present invention, and FIG. 2 is a cross-sectional view of a vehicle automatic transmission to which the power transmission drum of an automatic transmission according to the present invention is applied. In the diagram: 1...M-speed transmission case 2...Power transmission drum 2A...Lubricating oil release hole 2B...Front drum 2C...Rear drum 2D...Gap 3...(
2nd) Planetary gear device 3A...Lubricating oil release position 10
0... Automatic transmission

Claims (1)

[Claims] 1) An automatic transmission having a power transmission drum that transmits power from one side to the other within a transmission case, and a planetary gear device disposed on the inner periphery of the power transmission drum. In this, the power transmission drum is provided with a lubricating oil release hole at an outer circumferential position of a lubricating oil releasing position of the planetary gear apparatus so that the lubricating oil released from the planetary gear apparatus flows out to the outer circumference of the power transmission drum. A power transmission drum for an automatic transmission characterized by: 2) The planetary gear device rotatably supports a sun gear connected to one side of the power transmission drum, a pinion gear that meshes with the sun gear, a ring gear that meshes with the pinion gear, and the pinion gear. It consists of a pinion shaft and a carrier consisting of a shaft support part that supports the pinion shaft, the support part of the carrier supports the carrier on the opposite side of the connection part between the power transmission drum and the sun gear, and the ring gear The power transmission drum for an automatic transmission according to claim 1, wherein the power transmission drum is supported by a ring gear flange at a position opposite to a connection side of the power transmission drum and sun gear.