JPS6138248A - Lubricating device of rotary support section of automatic speed changer - Google Patents

Abstract

PURPOSE:To lubricate a portion between a rotary member and a rotary support section utilizing the lubricating oil discharged into a speed changer case by forming on the rotary member an oil passage communicating the side wall of the outer periphery on the speed changer case side and the otuer periphery position of the rotary support section. CONSTITUTION:An oil passage 4 communicating the side wall of the outer periphery on the speed changer case 3 side and the outer periphery position of a rotary support section 2A is formed on a rotary member 2. Thereby, the lubricating oil discharged to the inner periphery wall of the speed changer case 3 flows out between the rotary member 2 and rotary support section 2A via the oil passage 4, and a portion between the rotary member 2 and rotary support section 2A can be lubricated by utilizing the lubricating oil discharged into the speed changer case 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to lubrication of a support portion of a rotating member that rotates in response to power transmission within an automatic transmission.

[Prior art] Friction caused by rotation of the rotating member is reduced between a rotating member that rotates in response to power transmission and a rotating support section that is supported within the transmission case and supports the rotating member from the inner periphery. Conventionally, lubricating oil has been supplied by providing an oil passage that communicates with the fixed member and the rotating support part from a lubricating oil supply oil passage, a hydraulic oil supply oil passage, etc.

[Problems to be Solved by the Invention] In the conventional technology shown above, the oil pressure in the 1Iyl lubricant supply oil passage and the hydraulic oil supply oil passage is set high; Since it is necessary to form a thin oil passage communicating between the rotating member and the rotation support part, it is difficult to process, and there is a problem that the oil pressure in the lubricating oil supply passage or the hydraulic oil supply passage decreases. was.

An object of the present invention is to provide an oil passage in the fixed member in which the outer periphery of the transmission case side communicates with the outer periphery of the rotation support part, so that the lubricating oil released to the inner periphery of the transmission case rotates through the oil passage. An object of the present invention is to provide a lubrication mechanism for a rotary support part of an automatic transmission, which does not reduce the oil pressure in a lubricating oil supply path or a hydraulic oil supply path because the oil is leaked between the body and the rotary support part.

[Means for Solving the Problem] In order to solve the above problem, a lubrication mechanism for a rotating support portion of an automatic transmission according to the present invention provides a lubrication mechanism for a rotating support portion of an automatic transmission.
and a fixed member 2 disposed inside the transmission case 3 and having a rotation support portion 2A that supports the rotation member 1 from the inner periphery, the rotation member 2 is connected to the transmission case 3. 3° [Function] From the members disposed inside the transmission case 3 The released lubricating oil is released onto the inner circumferential wall of the transmission case 3, and is led to the inner circumferential wall of the transmission case 3 and drained. Of the lubricating oil released onto the inner circumferential wall of the transmission case 3, the lubricating oil released onto the outer circumferential side of the fixed member 2 flows through the oil passage 4 provided in the fixed member 2.
The lubricating oil that has flowed into the oil passage 4 flows out to the outer periphery of the rotation support portion 2A on the inner periphery side of the oil passage 4, and the lubricating oil flows into the rotation member 1.
Lubricating between the rotary support portion 2A and the rotary support portion 2A.

[Effects of the Invention 1] The lubrication mechanism for the rotational support portion of the automatic transmission of the present invention having the above-described configuration has the following effects.

b) By providing an oil passage in the fixed member that communicates between the outer peripheral side wall and the outer peripheral position of the rotation support part, 1Illll lubricant oil released to the inner peripheral wall of the transmission case can rotate with the rotating member via the oil passage. The lubricating oil discharged into the transmission case can be used to lubricate the space between the rotating member and the rotating support because it flows out between the rotating member and the support.

By providing the fixed member with an oil passage that communicates the outer circumferential side wall with the outer circumferential position of the rotation support portion, the weight of the fixed member can be reduced, and the weight of the automatic transmission to which it is applied can be reduced.

(Effects of Example) C) The oil passage that communicates the outer side wall formed on the fixed member and the outer circumference position of the rotating part support part is connected to the internal oil passage provided on the inner circumference side from the outer circumference of the rotating member. , consisting of a supply oil passage that communicates the content oil passage with the inner peripheral surface of the transmission case, and a discharge oil passage that communicates the content oil passage with the outer circumferential position of the rotation support part, and the supply oil passage is connected to a fixed member. Due to the mold used to cast the fixed member, and because the discharge oil passage was formed by casting when the fixing member was cast, the inner oil passage is only machined after the fixing member is formed, which reduces the need for machining equipment and reduces production costs. Can be held low.

[Embodiment] Next, a lubrication mechanism for a rotation support portion of an automatic transmission according to the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a sectional view showing a lubrication mechanism for a rotational support portion of an i-dynamic transmission according to the present invention, and FIG. 2 is a cross-sectional view of a vehicle automatic transmission to which the lubrication mechanism for a rotational support portion of an automatic transmission according to the present invention is applied. Show the diagram.

Automatic transmission m 100 is hydraulic torque converter 200
, transmission 300 , and hydraulic control device 400
It consists of

The transmission 300 includes a first planetary gear device UO1
One multi-disc clutch C01 operated by hydraulic servo
An overdrive transmission 300A including one multi-disc brake BO1 and one one-way latch FO, a second planetary gear system U1, a third planetary gear system U2, two multi-disc clutches C1 operated by a hydraulic servo, C2,1
Two belt brakes B1. Two multi-disc brakes B2.8
3, and an underdrive transmission 300B with three forward speeds and one reverse speed, which includes two one-way latches F1 and F2.

The automatic transmission 1 ioo transmission case 3 includes a torque converter housing 12 that accommodates a torque converter 200.
0. Transmission case 130 integrally formed with chambers accommodating overdrive transmission 300A and underdrive transmission 300B, automatic transmission 1
Extension housing 1 that covers the back side of ioo
40, these torque converter housings 1
20, 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 1 to a cover 201 that rotate under the drive of an engine (not shown), and a circle 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 launch 204 disposed opposite to the pump impeller 203, and a turbine holding the turbine launch 204. A stator 208 is supported by a fixed shaft 207 connected to the transmission case 3 via 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 15 having a cylindrical portion 151 protruding forward on the inner periphery.
2 is fastened to the front part of the transmission case 130, and the extension member 2 is connected to the inner peripheral end of the rear cover 202.
10 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 rearward projecting wall that partitions an overdrive mechanism chamber 130A in which a 4-bar drive transmission 300A is formed and an underdrive m1ll chamber 130B in which an underdrive transmission 300B is formed. A fixing member 2 having a cylindrical rotation support portion 2A 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-way clutch 2 that supports the stator 208 of the torque converter 200.
A fixed shaft 207 of No. 06 is fitted, and a transmission 3000 Å power shaft 10, 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 power 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 power transmission shaft 11 slides into a hole 102 of the input shaft 10. The intermediate transmission shaft 11 has a flange portion 111 at its rear end, and a rearward-facing hole 112 is formed in the center of which the tip of an output shaft 12 that transmits power to the driving wheels slides. Output shaft 1
2 fixes a sensor rotor 121 for rotation speed detection and a speedometer drive gear 122 within the extension housing 14, and the rear end has a spline groove 12 on the outer periphery to fit a sleeve yoke that transmits power to the drive wheels.
3 is formed, and is rotatably supported by the extension housing 140 via a sleeve yoke, and its front end is rotatably supported within the hole 112 of the intermediate transmission shaft 11.

The overdrive transmission 300A has the input shaft 10
A first planetary gear unit MUO is provided behind the MUO, its ring gear RO is coupled to the intermediate transmission shaft 11 via a seven-flange plate 113, the planetary carrier 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, there is a first
A hydraulic press drum 14 is fixed to the inner race shaft 13, and an annular piston 15 is fitted between the outer circumferential wall 14A and the inner circumferential wall 14B of the first hydraulic servo drum 14 to engage the carrier PO and the first hydraulic servo drum 14. and a return spring 16 that forms the hydraulic servo C-0 of the clutch CO that releases and presses the annular piston 15 toward the hydraulic servo C-0 toward the inner race shaft 13, and the outer peripheral wall 1.
A clutch CO is installed inside 4A, and the clutch CO
The first hydraulic servo drum 14 and the inner race shaft 13 are connected to the carrier PO. 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 an outer race 17 and a transmission case 1 are provided on the outer periphery of the unidirectional latch FO.
A clutch CO and a brake BO are provided between the brake BO and the brake B in front of the fixed member 2 behind the brake BO.
A piston 18 that presses O is fitted, and a hydraulic servo B-0 of the brake BO is formed between the piston 18 and the fixed member 2. A return spring 19 is fitted to push it to the side.

In the underdrive transmission 300B, first, at the front, a rotary body 1, which is a rearward-opening second hydraulic servo according to the present invention, is rotatably fitted around the outer periphery of the rotation support portion 2A of the fixed member 2, and the outer peripheral wall thereof An annular piston 21 that presses the clutch C2 is fitted between the annular piston 20A and the inner circumferential wall 20B, and a hydraulic servo C-2 of the clutch C2 is formed between the annular piston 21 and the rotating body 1. A return spring 22 that presses the hydraulic servo C-2 toward the hydraulic servo C-2 side, and a clutch C2 are installed inside the outer peripheral wall 20A. At the rear of the rotating body 1, a third hydraulic servo drum 24 which is open to the rear and has an annular protrusion 23 at the front is fixed to the outer periphery of the clutch portion 111 at the rear of the intermediate transmission shaft 11. An annular piston 25 that presses the clutch C1 between the rear end, the outer peripheral wall 24^ of the third hydraulic servo drum 24, and the outer periphery of the clutch portion 111.
is fitted to form the hydraulic servo C-1 of the clutch C1 between the annular piston 25 and the third hydraulic servo drum 24, and a return that suppresses the annular piston 25 toward the hydraulic servo C-1 side on the inner peripheral side of the clutch C1. spring 26,
Furthermore, a clutch C2 is attached to the outer periphery of the annular projection 23,
The second and third hydraulic servo drums 20.
24 are connected. A second planetary gear device U1 is provided behind the third hydraulic servo drum 24, and its ring gear R1 is located in front of a rotary support portion 27 that rotatably supports the ring gear R1 on the outer periphery of the output shaft 12. The third
The carrier P1 is connected to the hydraulic servo drum 24, the carrier P1 is fitted on the front outer periphery of the output shaft 12, and the sun gear S
1 is integrally formed at the tip of a sun gear shaft 29 rotatably provided on the outer periphery of the output shaft 12. Also, Section 2.3
Hydraulic servo drum 20.24 and second planetary gear unit U
Connecting drum 3 molded to cover 1 in a minimum space
0 is fixed to the outer periphery of the rotating body 1 at its front end, and its rear end is connected to the sun gear shaft 29 behind the second planetary gear unit @U1, and a belt that fixes and releases the connecting drum 30 on the outer periphery side. A brake B1 is provided.

The fixed member 2 includes an inland oil passage 4A provided on the inner periphery side from above the outer periphery, and a collection oil passage 4B that communicates the inland oil passage 4A with the inner peripheral wall surface of the transmission case 130 of the transmission case 3. , a discharge oil passage 4C that communicates the inner sea oil passage 4A and the outer peripheral position of the rotation support part 2A, and the transmission case 3
An oil passage 4 is formed in which the rear side wall on the outer periphery of the transmission case 130 side communicates with the outer periphery position of the rotation support part 2A, and the collection oil passage 4B is formed by a mold for casting the fixed member 2, and a discharge oil passage. 4C is formed by casting when the fixing member 2 is cast, and the inland oil passage 4A is drilled after the fixing member 2 is formed so that the collecting oil passage 2B and the discharge oil passage 2C communicate with each other. Also, inside the fixed member 2, as shown in FIG.
C-2 hydraulic oil supply oil passage 5B that communicates with hydraulic servo C-2 of clutch C2 and supplies and discharges hydraulic oil, and lubricating oil supply that supplies lubricating oil from the outer circumference of the intermediate transmission shaft 11 to the inner circumference. An oil passage 5C and a B=o hydraulic oil supply oil passage 5D that communicates with the hydraulic servo B-0 of the brake BO and supplies and discharges hydraulic oil are provided.

The inner circumferential wall 20B of the rotating member 1 provided on the outer periphery of the rotation support portion 2A of the fixed member 2 has a
An oil groove 6A corresponding to the hole 1A and communicating with the C=2 hydraulic oil supply passage 5B is provided between the support part 2, and an oil groove 6A communicating with the C=2 hydraulic oil supply passage 5B. The sleeve 6 has seal ring grooves 6B and 6C on its outer periphery on both sides of the rotary support part 2A, and a thin cylindrical part 6E is formed at the rear via a step 6D.
It is fixedly attached to the outer periphery of the A front seal ring 7A and a rear seal ring 7B made of Teflon are disposed in the seal ring grooves 6B and 6G of the sleeve 6 to prevent leakage of the hydraulic oil supplied to the hole 1A via the oil groove 8A. Further, a ring-shaped pusher 18 having an oil groove 8A communicating with the inner circumference and the outer circumference on the front side is disposed between the rear surface of the fixed member 2 and the fixed member 1, and includes the rotating member 1, the fixed member 2,
There is a gap A between the bushing 8 and the front seal ring 7A.
is formed, and a discharge oil passage 4C of the oil passage 4 is opened in the gap Δ. In the above operation, the lubricating oil released from the underdrive transmission 300B on the rear side of the fixed member 2 is diffused and released to the inner peripheral wall of the transmission case 130 of the transmission 3, and the lubricant released to the inner peripheral wall of the transmission case 130 is released. Of the oil, the lubricating oil released to the opening of the collection oil passage 4B located above the fixed member 2 passes through the inner sea oil passage 4A and the discharge oil passage 4C to the gap formed at the outer peripheral position of the rotation support part 2A. A, and the lubricating oil in the gap A is supplied to the front seal ring 7A disposed between the rotating member 1 and the rotation support part, and lubricates the front seal ring 7A. Further, the lubricating oil excessively supplied into the gap A is drained through the oil groove 8A of the bushing 8 on the outer peripheral side of the gap A.

A brake plate b2 of the brake B2 at the front and a brake plate b3 of the brake B3 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 328 of the fourth hydraulic servo drum 32 and the annular projection 31, and a hydraulic servo B of the brake B2 is fitted between the annular piston 33 and the fourth hydraulic servo drum 32. -2
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 are 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 sun gear s2 is integrally formed with a sun gear shaft 29, a carrier P2 is connected to an outer race 4o 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, when the shift lever of the automatic transmission is selected to the parking (P) position, the parking pawl 43 moves to the parking gear 4.
1 to fix the output shaft 12.

The transmission 300 adjusts the transmission case 1 depending on 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 achieved gear (RANGE)
) - 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 it is engaged in the state, this engagement is not necessarily required (locked) because power transmission is guaranteed by a clutch or brake installed in parallel. (L
) indicates that the corresponding one-way clutch is engaged only in the engine drive state and not in the engine brake state. Roughly f indicates that the corresponding one-way clutch is free.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a lubrication mechanism for a rotational support portion of an automatic transmission according to the present invention, and FIG. 2 is a sectional view of a vehicle automatic transmission to which the lubrication mechanism for a rotational support portion of an automatic transmission according to the present invention is applied. , 3rd
The figure is a sectional view of the fixing member.

Claims (1)

[Scope of Claims] 1) A rotating member that rotates in response to power transmission, and a fixed member that has a rotating support portion that supports the rotating member from the inner periphery and is disposed within a transmission case. In the automatic transmission, the rotating member is characterized in that an oil passage is formed in which an outer circumferential side wall of the transmission case side communicates with an outer circumferential position of the rotational support portion. 2) The oil passage includes an inner oil passage provided on the inner peripheral side of the outer periphery of the rotating member, a supply oil passage that communicates the inner oil passage with the inner circumferential surface of the transmission case, and Claim 1, comprising a discharge oil passage communicating an inner oil passage and an outer circumferential position of the rotary support part, the discharge oil passage being formed by casting during molding of the fixed member. A lubrication mechanism for a rotating support portion of an automatic transmission according to item 1. 3) The outer circumferential position of the support part is located between the rotating member, the rotating support part, a seal ring disposed between the rotating member and the rotating support part, and a side wall of the rotating member and the fixed member. 2. The lubrication mechanism for a rotary support portion of an automatic transmission according to claim 1, wherein the lubrication mechanism is a chamber formed between a ring-shaped bush disposed between the lubrication mechanism and the ring-shaped bushing.