JPS6138263A - Through hole of intermediate supporting wall in automatic speed changer - Google Patents

Abstract

PURPOSE:To decrease a polishing part and reduce production cost, by providing a turn stop inserted into a through hole provided in an intermediate supporting wall of a transmission. CONSTITUTION:An intermediate supporting wall 3 forms a through hole 3A, connecting one side speed change mechanism chamber 2C in the side of one side speed change mechanism 2A with a chamber 2D of the other side speed change mechanism 2B, in a part of the position where a washer 5 is arranged. The through hole 3A serves as a ventilation hole providing the internal pressure of air in the both chambers 2C and 2D to a fixed level while prevents the washer 5 from being dragged by a disc part 20C of a rotary member 4 and rotated by fitting a turn stop 5A protrusively provided in the front of the washer 5. In this way, the washer, being required to polish only its surface side adapting the rotary member, enables production cost to be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an intermediate support that partitions a transmission mechanism on one side and a transmission mechanism on the other side, such as an overdrive transmission and an underdrive transmission, in a transmission. Regarding walls.

[Prior Art] Conventionally, a transmission mechanism disposed in a transmission case has an intermediate support wall that separates one side transmission mechanism from the other side transmission mechanism, and an intermediate support wall that is disposed adjacent to the intermediate support wall to transmit power. An automatic transmission includes a rotating member that rotates in response to transmission, and a washer that is disposed between the intermediate supporting wall and the rotating member and prevents the intermediate supporting wall and the rotating member from coming into contact with each other. Since the washer is not processed to prevent rotation and will slide against the rotating member, it is necessary to reduce the sliding resistance on both the surface where the intermediate support wall of the washer contacts and the surface where the rotating member contacts. It had been processed. In addition, the outer circumference of the intermediate support wall is supported within the transmission case, and no special ventilation holes are provided between the transmission mechanism on one side and the transmission mechanism on the other side, and communication through oil only within the oil pump is established. It was only done.

[Problems to be Solved by the Invention] In the conventional technology described above, both sides of the washer, such as the surface on which the intermediate support wall comes into contact and the surface on which the rotating member comes into contact, are polished to reduce sliding resistance. This has the disadvantage of increasing production costs. In addition, conventional intermediate support walls were not provided with ventilation holes, and only communicated with the oil in the oil pan, so for example, if one transmission mechanism was an overdrive transmission and the other transmission was an underdrive transmission. Yes, if a breather that adjusts the air pressure inside the automatic transmission is installed on the overdrive transmission side, and if the overdrive transmission continues to drive in direct gear, the transmission mechanism only on the underdrive transmission side will be damaged. During use, the temperature inside the underdrive transmission increases, and the air pressure on the underdrive transmission side rises, causing the oil level on the underdrive transmission side to drop by the increase in air pressure. When the oil level on the underdrive transmission side drops, the oil level on the overdrive transmission side rises because oil is communicating in the oil pan, and the rising oil is agitated by the overdrive transmission, causing foaming. arise. If a pressure difference occurs between the transmission mechanism on one side and the transmission mechanism on the other side as described above, there is a risk that the height of the oil level will be displaced by the pressure and the oil level will be agitated.

An object of the present invention is to provide a through hole through which one transmission mechanism side and the other transmission mechanism side communicate with each other at the position where the washer of the intermediate support wall is disposed, and to provide a through hole for the washer to be inserted into the through hole. By installing a stopper and inserting a detent into the through hole of the intermediate support wall, the rotation between the intermediate support wall and the washer can be stopped, so only the side of the washer that is in contact with the rotating member It is only necessary to perform polishing to reduce sliding resistance, which can keep production costs low, and because the through hole is used as a ventilation hole between the one side transmission mechanism side and the other side transmission mechanism side, one side transmission mechanism To provide a through hole in an intermediate support wall of an automatic transmission, which can eliminate the difference in air pressure between one side and the other side of a transmission mechanism, eliminate the air pressure difference, and alleviate stirring action.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the through hole in the intermediate support wall of the automatic transmission of the present invention allows the transmission mechanism 2 disposed in the transmission case 1 to be connected to the one side transmission mechanism 2A. Other side transmission mechanism 2
an intermediate support wall 3 that partitions the intermediate support wall 3; a rotating member 4 that is arranged adjacent to the intermediate support wall 3 and rotates upon receiving power; and a rotating member 4 that is arranged between the intermediate support wall 3 and the rotating member 4. A washer 5 is provided to prevent the intermediate support wall 3 and the rotating member 4 from coming into contact with each other.
In the automatic transmission having the above-mentioned intermediate support wall 3, the one transmission mechanism 2 is located at a position where the washer 5 is disposed.
A through hole 3A is provided through which the forward side and the other side transmission mechanism 2B side communicate with each other, and the washer 5 is provided with a detent 5A that is inserted into the through hole 3A. The structure is such that a rotation stopper 5A is inserted and attached to the through hole 3^.

[Operations and Effects of the Invention] The through holes in the intermediate support wall of the automatic transmission of the present invention having the above-mentioned configuration are provided at positions where the washers of the intermediate support wall are disposed, on one side of the transmission mechanism and on the other side of the transmission mechanism. In addition to providing a through hole through which the washer communicates with the washer, a detent is inserted into the through hole, and the washer is installed by inserting the detent into the through hole of the intermediate support wall, thereby preventing rotation between the intermediate support wall and the washer. This allows only the side of the washer that comes into contact with the rotating member to be polished to reduce the sliding resistance, which helps keep production costs low and allows the through-hole to be used for one-sided transmission. Since the ventilation hole is provided between the mechanism side and the other transmission mechanism side, it is possible to eliminate the difference in air pressure between the one side transmission mechanism side and the other side transmission mechanism side, and prevent the stirring effect due to the air pressure difference.

[Example] Next, a through hole in an intermediate support wall of an automatic transmission according to the present invention will be described based on an example shown in the drawings.

FIG. 1 is a cross-sectional view showing a through hole in an intermediate support wall 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 through hole in an intermediate support wall of an automatic transmission according to the present invention is applied. shows.

The automatic transmission 100 includes a hydraulic torque converter 200, a transmission mechanism 2, and a hydraulic control device 400.

The transmission mechanism 2 includes a first planetary gear unit UO1, one multi-disc clutch C0 operated by a hydraulic servo, one multi-disc brake BO1, and one one-way latch FO, which is an overdrive transmission mechanism 2A. ,
A second planetary gear unit U1, a third planetary gear unit U2, two multi-plate clutches C1, C2 operated by hydraulic revo,
One belt brake B1. Two multi-disc brakes B2
, B3, and the other side transmission mechanism 2B, which is an underdrive transmission with three forward speeds and one reverse speed, and includes two one-way latches F1 and F2.

The transmission case 110 of the automatic transmission @ 100 is a transmission case that is integrally formed with a torque converter housing 120 that houses a torque converter 200, and chambers that house a transmission mechanism 28 on one side and a transmission mechanism 2B on the other side. 1, an extension housing 140 that covers the rear side of the automatic transmission mioo, and these torque converter housing 120, transmission case 1, and 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 an annular plate welded to the inner circumference of the front cover 201. A rear cover 202 having a shape, 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 shell 205 holding the turbine launch 204. , the stator 20 is supported by a fixed shaft 207 connected to the transmission case 110 via a one-way clutch 206, and increases the torque capacity when the input rotation speed is low.
8. The front cover 201 and the turbine shell 205
between the front cover 201 and the turbine shell 205
A direct coupling clutch (lock-up clutch) 209 is provided that rotates the same rotation. Between the cylindrical transmission case 1 and the torque converter housing 120, which are continuous to the rear of the torque converter housing 120,
An oil pump body 152 that houses an internal tooth width oil pump 150 having an external gear 150a and an internal gear 150b inside, and has a cylindrical part 151 protruding forward on the inner periphery is located at the front of the transmission case 1. An extension member 210 that is fastened and connected to the inner circumferential end of the rear cover 202 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 1 . Further, in the middle of the transmission case 1, there is a rearwardly projecting cylinder that partitions one side transmission mechanism chamber 2C in which the one side transmission mechanism 2A is formed and the other side transmission mechanism chamber 20 in which the other side transmission mechanism 2B is formed. The intermediate support wall 3 according to the present invention is provided with a support portion 3B having a shape. At the rear of the transmission case 1 (on the right side in the figure), there is a cylindrical rear port 13 that protrudes forward.
A rear support wall 134 having a diameter of 3 is provided.

Inside the front support 153 is a one-sided clutch 2 that supports the stator 208 of the torque converter 200.
06 fixed shaft 20? The input shaft 10 of the transmission mechanism 2, which is the output shaft of the torque converter 200, is rotatably supported inside the fixed shaft 207. The input shaft 10
has a 7-lung portion 101 at the rear end, and a rearward facing hole 102 formed in the center of the rear end. The input shaft 10
An intermediate power transmission shaft 11 arranged on the image side of the input shaft 10 is rotatably attached to the rear of the input shaft 10, and the tip of the intermediate power transmission shaft 11 slides into the hole 102 of the input shaft 10. axis 1
1 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. 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 to fit a sleeve yoke for transmitting power to the drive wheels on the outer periphery. A groove 123 is formed,
Extension housing 1 via sleeve yoke
40, and its front end is rotatably supported within the hole 112 of the intermediate shaft 11.

The one-side transmission mechanism 2A is provided with a first planetary gear device UO behind the input shaft 10, whose ring gear RO is connected to the intermediate transmission shaft 11 via a seven-lunge plate 113, and a planetary carrier PO is connected to the input shaft 10. 10, 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. A clutch CO that is fitted and engages and disengages the carrier PO and the first hydraulic servo drum 14
A return spring 16 forms the hydraulic servo C-0 and presses the annular piston 15 toward the hydraulic servo C-0 on the inner race shaft 13 side, and a clutch CO is installed inside the outer peripheral wall 14A. The first hydraulic servo drum 14 and the inner race shaft 13 are connected to the carrier PO. First hydraulic servo drum 1
A one-way latch FO with the inner race shaft 13 as the inner race is provided on the inner periphery of the transmission gear 4, and a clutch CO and a brake BO are provided on the outer periphery between the outer race 17 and the transmission coos 1. A piston 18 that presses the brake BO is fitted in the front of the intermediate support wall 3, and a hydraulic servo B-0 for the brake BO is formed between the piston 18 and the intermediate support wall 3. A return spring 19 is fitted into the portion 135 to press the piston 18 toward the hydraulic servo B=O side.

The other side transmission mechanism 2B consists of an outer circumferential wall 20A, an inner circumferential wall 20B, and a disk portion 20C at the front, and a rotating member 4, which is a second hydraulic servo drum opening at the rear, is connected to an intermediate support wall 3.
is rotatably fitted around the outer periphery of the support portion 3B of
A washer 5 is disposed between the rotary member 4 and the rotary member 4, which is made of a press molded product and has a detent 5A projecting forward to prevent the intermediate support wall 3 and the rotary member 4 from coming into contact with each other.
An annular piston 21 that presses the clutch C2 is fitted between the outer peripheral wall 208 and the inner peripheral wall 20B, and a hydraulic servo C- of the clutch C2 is fitted between the annular piston 21 and the rotating member 4.
2 and an annular piston 21 on the inner peripheral wall 20B side.
Return spring 2 that presses the C-2 side toward the hydraulic servo C-2.
2. A clutch C2 is installed inside the outer peripheral wall 20A.

As shown in FIG. 3, FIG. 4, and FIG. A through hole 3A that communicates with the other side transmission mechanism chamber 2D on the side transmission mechanism 2B side.
is formed, and the through hole 3^ serves as a ventilation hole to keep the internal pressure constant between the transmission mechanism chamber 2C on one side and the transmission mechanism chamber 20 on the other side, and is provided so as to protrude in front of the washer 5. By fitting the rotation stopper 5A, the washer 5 is prevented from being dragged by the disk portion 20C of the rotating member 4 and rotated.

At the rear of the rotating member 4, 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 flange portion 111 at the rear of the intermediate transmission shaft 11. An annular piston 25 that presses the clutch C1 is fitted between the rear end, the outer peripheral wall 24A of the third hydraulic servo drum 24, and the outer periphery of the flange portion 111, and the clutch is inserted between the annular piston 25 and the third hydraulic servo drum 24. A hydraulic servo C-1 of C1 is formed, and an annular piston 25 is installed on the inner peripheral side of the clutch C1.
A clutch C2 is attached to the outer periphery of the return spring 26 and the annular protrusion 23, which presses the -1 side.
A second and third hydraulic servo drum 20.24 is connected via 2. Behind the third hydraulic servo drum 24,
A second planetary gear unit U1 is provided, and its ring gear R1
is connected to the third hydraulic servo drum 24 via a clutch C1 and an annular protrusion 28 protruding in front of a rotation support member 27 that rotatably supports the ring gear R1 on the outer periphery of the output #A12, The carrier P1 is the output shaft 1
The sun gear S1 is spline-fitted to the front outer periphery of the output shaft 12, and is integrally formed at the tip of a sun gear shaft 29 rotatably provided on the outer periphery of the output shaft 12. Further, a connecting drum 30, which is molded to cover the second and third hydraulic servo drums 20, 24 and the second planetary gear unit U1 in a minimum space, is fixed to the outer circumference of the rotating member 4 at its front end, and its rear end is fixed to the outer periphery of the rotating member 4. A belt brake B1 is connected to the sun gear shaft 29 behind the second planetary gear unit U1, and is provided on the outer peripheral side 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 B3 at the rear are spline-fitted to a spline 136 formed on the inner periphery of the rear part of the transmission case 1.
A fourth hydraulic servo drum 32, which is open to the front and has an annular projection 31 on the front side, is spline-fitted between the four hydraulic servo drums 3 and 3. 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. A return spring 34 is provided on the inner peripheral wall 32B side to press the annular piston 33 toward the hydraulic servo B-2. Further, a one-way latch F1 with the sun gear shaft 29 as an inner race is provided on the inner circumference side of the brake B2, and the brake B2 is attached to the outer circumference of the outer race 35. Rear support wall 134 on the rear side of brake B2
A plurality of pistons 311, 373 and a reaction sleeve 372 that press the brake B3 are fitted into the annular hole 36 formed between the outer circumferential side of the rear support 133 and the transmission case 1, and the hydraulic servo B of the brake B3 is fitted.
A return spring 38 that forms the piston 371. The inner race 39 of the one-way latch F2 arranged on the inner periphery of the brake B3 is connected to the fourth hydraulic servo drum 32 on the outer periphery of the sun gear shaft 29, and the brake B3 is attached to the outer periphery of the outer race 40 of the one-way clutch F2. It has been.

In the third planetary gear device U2, the rotation gear s2 is connected to the sun gear shaft 2.
9, the carrier P2 is connected to the outer race 40 of the front one-sided clutch F2, and is also connected to the brake B3, and a ring gear R2 having a parking gear 41 around the outer periphery is connected to the output shaft 12 with the inner periphery. They are connected via a spline-fitted connecting member 42. The parking gear 41 is provided so that a parking pawl 43 engages with the parking gear 41 to fix the output shaft 12 when the shift lever of the automatic transmission is selected to the parking (P) position.

The transmission mechanism 2 controls various friction coefficients from a hydraulic control device 400 in a valve body 403 built in an oil pan 402 fastened to the lower part of the transmission case 1 with bolts 401, depending on vehicle running conditions such as vehicle speed and throttle opening. By selectively outputting hydraulic pressure to the hydraulic servo of the coupling device,
Each clutch and brake is engaged or released;
It is designed to perform four forward gear shifts or one reverse gear shift.

Table 1 does not show examples of the gear positions (RANGE) achieved by the operation of each clutch, brake, and one-way clutch.

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 since power transmission is guaranteed by a clutch or brake built in parallel with it ( lock). (L) indicates that the corresponding one-way latch engages only in the engine drive state and does not engage in the engine brake state. Roughly f indicates that the corresponding one-way latch is free. 1

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a through hole in an intermediate support wall of an automatic transmission according to the present invention, and FIG. 2 is a side view of a vehicle automatic transmission to which the through hole in an intermediate support wall of an automatic transmission according to the present invention is applied. Cross section, 3rd
The figure is a front view of the intermediate support wall, FIG. 4 is a sectional view taken along line A-A shown in FIG. 3, and FIG. 5 is a rear view of the intermediate support wall. In the diagram 1... Transmission case 2...
Transmission m '2A-・One side transmission mechanism 2B...Other side transmission mechanism 20...-・One side transmission mechanism chamber 2T・
Other side transmission mechanism chamber 3... Intermediate support wall 3A-・Through hole 4... Rotating member 5... Washer 5A River stopper 20C... Disk portion 100... Automatic transmission

Claims (1)

[Scope of Claims] 1) A transmission mechanism disposed in a transmission case includes an intermediate support wall that partitions one transmission mechanism from the other transmission mechanism, and an intermediate support wall disposed adjacent to the intermediate support wall, an automatic transmission comprising: a rotating member that rotates in response to transmission; and a washer disposed between the intermediate supporting wall and the rotating member to prevent the intermediate supporting wall and the rotating member from coming into contact with each other, A through hole through which the one transmission mechanism side and the other transmission mechanism side communicate with each other is provided at a position of the intermediate support wall where the washer is disposed, and a detent is inserted into the through hole in the washer. A through hole in an intermediate support wall of an automatic transmission, wherein the washer is attached by inserting a detent into the through hole in the intermediate support wall.