JPS6145155A - Valve body of hydraulic controller of vehicle's speed changing gear - Google Patents

Abstract

PURPOSE:To reduce quantity of oil which remains inside a hydraulic valve body by forming a hole which communicates a recess on the upper face of the valve body or a oil discharge passage inside the valve body with the lower face thereof. CONSTITUTION:There is provided a hole 3 communicating a recess on the upper face with the lower face of a valve body 1 which is mounted inside an oil pan disposed in the lower position inside the case of an automatic transmission 100 and which has an oil pressure controller. Or there is provided a hole 5 which communicates the lower face of said valve body with a drain oil passage 4 formed inside said valve body 1. When drain oil falls on the upper face of the valve body from a transmission of a high position, the oil will not be stagnated on the upper face thereof or inside and flows down into an oil pan of a lower position, hence reducing quantity of stagnated value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a valve body for an automatic transmission mounted on a vehicle.

[Prior art] Automatic transmissions for vehicles include fluid transmission devices such as torque converters and fluid couplings, transmission devices such as planetary gear types, constant mesh types, and stepless types, and automatic transmissions that house these devices. It is arranged in an oil sump (oil pan) attached to the lower surface of the transmission case (transmission case) below the transmission case, and is fastened to the lower surface of the transmission case, and is used to change the speed of the transmission. It has a valve body equipped with a hydraulic control [I device] for controlling the valve body. Also, inside and outside of the valve body, a large number of spool valves, accumulators, solenoid valve communication oil passages, drain oil passages, etc., which are components of the hydraulic control device, are provided. There are irregularities.

[Problem to be solved] As mentioned above, since the valve body is installed below the transmission, used lubricating oil, drained hydraulic oil, etc. constantly fall from the transmission during operation. Conventional valve bodies have no measures for returning the accumulated oil that remains in the recess on the top surface or in the drain oil passage of the valve body to the oil pan.

An object of the present invention is to be able to reliably reduce the amount of accumulated oil that remains in the recess on the upper surface of the valve body and the internal drain oil passage, and to prevent the occurrence of a shortage of hydraulic oil even when the hydraulic oil level of an automatic transmission is reduced. The present invention provides a valve body for a hydraulic control device for a vehicle automatic transmission.

[Means for Solving the Problems] The present invention provides a valve body and a recess 2 on the upper surface of a valve body 1 which is installed in an oil pan at the bottom of an automatic transmission case and in which a hydraulic control device for an automatic transmission is provided. A hole 3 communicating with the lower surface or a hole 5 communicating between the drain oil passage 4 in the valve body 1 and the lower surface of the valve body are provided. 1 [Operations and Effects of the Invention] The valve body of the hydraulic control device for a vehicle automatic transmission of the present invention has a hole 3 or a drain oil passage in the valve body that communicates the recess on the upper surface of the valve body with the lower surface of the valve body. Hole 5 is provided to connect the valve body and the lower surface of the valve body.
The amount of oil remaining on the top surface of the valve body or inside the valve body can be reduced.

[Example code] Next, the present invention will be explained based on embodiments shown in the drawings.

The automatic transmission 11100 is a hydraulic torque converter 200
, transmission 300 , and hydraulic control device 400
It consists of

The transmission 300 includes an overdrive planetary gear transmission 10 comprising a first planetary gear set p1, one multi-disc clutch C01 operated by a hydraulic servo, one multi-disc brake BO1 and one one-way latch FO, and a second planetary gear set p1. Gear set p2, third planetary gear set p3, two multi-disc clutches C1 and C2 operated by hydraulic servo, one belt brake B1
．． It is comprised of an underdrive planetary gear transmission 40 with three forward speeds and one reverse speed, which includes two multi-disc brakes B2 and B3 and two one-way latches F1 and F2.

Case 110 of automatic transmission 100 includes a torque converter housing 120 that accommodates torque converter 200;
A transmission case 1301 that houses an overdrive planetary gear transmission 10 and an underdrive planetary gear transmission 40 in series includes an extension housing 140 that covers the rear side of the automatic transmission @ 100, and these torque converter housings 120 and the transmission. The case 130 and the extension housing 140 are each fastened with a large number of bolts so as to have coaxial centers.

The torque converter 200 is housed in a torque converter chamber 121 that is open at the front (engine side) of the torque converter housing 120, and includes a front cover 111, which is an input member connected to the output shaft of the engine, and is welded to the front cover 111 at the outer periphery. Annular plate-shaped rear cover 1
12. A pump impeller 205 disposed around the inner peripheral wall of the rear cover 112, a turbine runner 206 disposed opposite to the pump impeller 205, a turbine shell 207 holding the turbine runner 206, one direction. A stator 201 supported by a fixed shaft 203 via a clutch 202, and an annular plate-shaped clutch whose inner periphery is connected to a friction surface 20 provided on the inner surface of the front cover 111 and a turbine hub 208 which is an output member. A direct-coupling clutch (lock-up clutch) 80, which is made up of a disk 50 and directly couples the front cover 111 and the turbine hub 208, is provided. Between the torque converter chamber 121 and the cylindrical transmission chamber 132 of the transmission case 130 which is continuous to the rear thereof, a gear type oil pump 150 is provided inside and a cylindrical portion protrudes forward in the center. An annular oil pump body 151 having a diameter of 152 is connected to the transmission case 130.
The front part is fitted with a spigot on the spring end face and fastened.
Further, on the rear side of the oil pump body 151, an oil pump cover 154 has a cylindrical front support 153 that is coaxial with the cylindrical portion 152 and projects rearward.
is fastened. The oil pump body 151 and the oil pump cover 154 are the oil pump housing 1.
55, which serves as a partition wall between the torque converter chamber 121 and the transmission chamber 132, and also serves as a front supporting wall of the transmission 300. Further, an overdrive mechanism chamber 133 and an underdrive mechanism chamber 1 are located between the transmission chamber 132 of the transmission case 130.
An intermediate support wall 159 having a cylindrical center support 158 that separates the center support 34 and projects rearward is separately cast and fitted. At the rear of the transmission case 130, a rear support wall 157 having a cylindrical rear support 156 projecting forward is provided by being integrally cast with the transmission case 130. The space between the oil pump housing (front support wall or partition wall) 155 and the rear support wall 157 forms a transmission chamber 132 that houses the transmission 300, and the space between the rear support wall 157 and the extension housing 140 forms the output shaft of the transmission. In the output shaft chamber 141, an electronically controlled sensor rotor 143 and a speedometer drive gear 144 are fixed to the output shaft. A sleeve yoke (not shown) is inserted through the center, and is connected to a propeller shaft (not shown).

The fixed shaft 20 is located inside the front support 153.
The input shaft 11 of the transmission, which is the output shaft of the torque converter 200, is rotatably supported inside the shaft 3. The input shaft 11 has a large-diameter rear end portion 12 with a flange portion 12a provided on the outer periphery behind the front support 153, and a rearward-facing central hole 13 is formed in the axis of the rear end portion 12. . Behind the input shaft 11, an intermediate transmission shaft 14 having a coaxial center with the input shaft 11 and arranged in series is rotatably provided.

The intermediate transmission shaft 14 has its tip inserted into the center hole 13 and comes into rotatable sliding contact with the inner circumferential wall of the center hole 13 via a metal bearing. A rearwardly facing central hole 16 is formed in the. An output shaft 36 is rotatably provided behind the intermediate transmission shaft 14 and is coaxial with the intermediate transmission shaft 14 and arranged in series. The output shaft 36 has its tip aligned with the center hole 1 of the intermediate transmission shaft 14.
6 and is in sliding contact with the inner wall of the center hole 16 via a metal bearing. The output shaft 36 has an intermediate portion 37
It is spline-fitted with a flange plate 82 provided with a rearwardly protruding shaft support 81 that meshes with the ring gear R2 of the third planetary gear set p3, and is spline-fitted with the sleeve yoke at the rear part 38.

In the overdrive mechanism chamber 133, the input! lol
! ! @1 planetary gear set p1 is provided on the rear side of 11, its ring gear RO is coupled to the intermediate transmission shaft 14 via a flange plate 22, the planetary carrier PO is coupled to the flange portion 12a of the input shaft 11, and the sun gear S
O is formed on the inner race shaft 23. On the front side of the first planetary gear set p1, a first hydraulic servo drum 24 that opens rearward is fixed to an inner race shaft 23.
An annular piston 2 between its outer peripheral wall and the inner race shaft 23
5 is fitted to form a hydraulic servo C-0 of the clutch CO, a return spring 26 is attached to the inner race shaft 23 side, and a clutch CO is attached to the inside of the outer peripheral wall, and is connected to the planetary carrier PO via the clutch CO. ing. A one-way latch FO with the inner race shaft 23 as an inner race is provided on the inner periphery of the first hydraulic servo drum 24, and a clutch CO and a brake 8 are provided on the outer periphery between the outer race 27 and the transmission case 130.
0 is provided, and the outer cylinder part 31 of the intermediate support wall 159 on the rear side
A piston 29 is fitted into the front side of the brake BO to form a hydraulic servo 8-0 of the brake BO, and a return spring 32 is provided at the tip of the outer cylinder 31.

Inside the underdrive mechanism chamber 134, at the front, a second hydraulic servo drum 41 that opens rearward is rotatably fitted onto the center support 158, and an annular piston 42 is fitted between its inner and outer circumferential walls to operate the clutch C2. In addition to forming a hydraulic servo C-2, a return spring 44 is attached to the inner circumferential wall, and a clutch C2 is attached to the inner side of the outer circumferential wall. On the rear side of the second hydraulic servo drum 41, a third hydraulic servo drum 46, which opens rearward and has a cylindrical clutch hub 35 welded to the front, is fixed to the rear end 15 of the intermediate transmission shaft 14. An annular piston 47 is fitted between the rear end portion 15 and the outer circumferential wall to form a hydraulic servo C-1 of the clutch C1, and a return spring 49 is attached to the inner circumferential side, and a clutch C2 is attached to the outer circumference of the clutch hub 35. , a second hydraulic servo drum 41, and a third hydraulic servo drum 46 are connected via a clutch C2. A second planetary gear set p2 is provided on the rear side of the third hydraulic servo drum 46, and its ring gear R1
is connected to the third hydraulic servo drum 46 via the clutch hub 48 and clutch C1, and the planetary carrier P
1 is spline-fitted to the tip of the output shaft 36, and the sun gear S1 is integrally formed with the sun gear shaft 45. In addition, the connecting drum 60, which is formed to cover the second hydraulic servo drum, the third hydraulic servo drum 41, 46, and the second planetary gear set p2 in a minimum space, is fixed to the outer periphery of the second hydraulic servo drum 41 at its tip. is,
The rear end is connected to the sun gear shaft 45 behind the second planetary gear set p2, and a belt brake B1 is provided on the outer circumferential side.

Transmission case 1 on the rear side of the brake B2
30, the brake disc b2 of the brake B2, the outer spline 76 of the fourth hydraulic servo drum 72, and the brake disc b3 of the brake B3 are spline-fitted from the front to the spline 75 formed inside the rear support wall 157 on the rear side. A piston 77 is fitted into an annular hole between the outer peripheral side of the rear support 156 and the transmission case 130 to form a hydraulic servo B-3 of the brake B3,
Further, the return spring 79 of the hydraulic servo B-3 is supported by a flange plate 82 attached to the tip of the rear support 156. A one-way latch F1 with the sun gear shaft 45 as an inner race is provided inside the brake B2, an outer race 39 is connected to the brake B2, and an inner race 83 is connected to a fourth hydraulic pressure on the rear side of the one-way clutch F1. A one-sided clutch F2 that is spline-fitted to the servo drum 72 on its outer and inner diameter is attached. Third
In the planetary gear set p3, a sun gear S2 is formed integrally with a sun gear shaft 45, a planetary carrier P2 is connected to an outer race 86 of a one-way clutch F2 on the front side, and is also connected to a brake B3, and a parking gear 85 is provided around the outer periphery. A ring gear R2 is connected to an intermediate portion 37 of the output shaft 36. When the shift lever of the automatic transmission is selected to the parking (P) position, the parking claw 84 engages with the parking gear 85 to fix the output shaft 36.

An annular fourth hydraulic servo drum 72 that is open to the front is provided in the surplus space 61 on the rear side of the connecting drum 60 outside the second planetary gear set p2. An intermediate cylinder 71 is press-molded, which protrudes from a predetermined position within the fourth hydraulic servo drum 72, is connected to the fourth hydraulic servo drum 72 through a welded portion 71A, and prevents oil pressure leakage from the hydraulic servo. An annular piston 73 is fitted between the fourth hydraulic servo drum 72 and the intermediate cylinder 71 to form a hydraulic servo B-2 of the brake B2, and the inner peripheral wall of the fourth hydraulic servo drum 72 and the intermediate cylinder 71 are connected to each other. A return spring 74 is installed in between, and a brake B2 is installed inside the outer peripheral wall. The intermediate cylinder 71 has a diameter that is optimal for the area of the piston 73.

The transmission 300 changes the transmission case 1 according to vehicle driving conditions such as vehicle speed and throttle opening.
Hydraulic control device 4 in valve body 1 built in oil pan 401 fastened to the lower part of valve body 30 by bolts 402
The hydraulic pressure selectively output from 00 to the hydraulic servo of each lfm engagement device engages or disengages each clutch and brake, resulting in four forward gear shifts or one reverse gear shift. . Table 1 shows an example of the operation of each clutch, brake, and one-way clutch and the achieved gear position (RANGE).

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

(L) indicates that the corresponding one-way clutch is engaged only in the engine drive state and is not engaged in the engine brake state. Furthermore, L is engaged in the corresponding one-way ludge engine drive state,
This indicates that the engagement is not necessarily required (lock) since power transmission is guaranteed by a clutch or brake installed in parallel. Zarani f
indicates that the corresponding one-way clutch is free.

A rough X indicates that the corresponding clutch and brake are released.

The valve body 1 is made by sandwiching an iron plate 1C between an upper valve body 1A and an upper valve body 1B, which are formed by casting aluminum alloy and then subjected to prescribed machining. device 400
Various spool valves, accumulators, check valves, throttles, connecting oil passages, etc. are provided, and multiple bolts 1
0 to the lower part of the transmission case 130 below the transmission 300. 2
is a recess in the upper surface 1D of the valve body, and in this embodiment, the hydraulic servo C- of the clutch C2 is provided in the manual shaft hole 2E and the center support 159.
It is formed around the communication oil passage 6A that connects the hydraulic oil to the oil supply/drainage passage 6 to the oil supply/drainage passage 6. 3 is upper valve body IA1 plate 1C
and the lower valve body 1B are provided to communicate with the recess 2 and the lower surface of the valve body 1, and the recess 2
This is a hole through which the oil that has entered inside flows down into the oil pan 401.

4 is a drain oil passage in the upper valve body 1A;
5 is provided to penetrate the upper valve body IA, the plate 1C, and the lower valve body 1B, and communicates the drain oil passage 4 with the lower surface of the valve body 1 to direct the oil in the drain oil passage into the oil pan 401. This is a hole for water to flow down. Drained oil that has fallen or flowed down from the upper transmission to the upper surface 1D of the valve body through these holes 3 and 5 does not stay on the upper surface of the valve body 1 or within the valve body 1, but flows down to the oil pan 401 below.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an automatic transmission for a vehicle using the valve body of the present invention, and FIG. 2 is an enlarged view of the main parts thereof. In the diagram 1...Valve body 1A...Upper valve body 1B...Lower valve body 1C...
Separator plate 10...Top surface of valve body 3
．． 5...hole.

Claims (1)

[Claims] 1) In a valve body that is installed in the oil pan at the bottom of the automatic transmission case and has a hydraulic control device for the automatic transmission installed inside, there is a recess on the top surface or an oil drain path inside the valve body. A valve body for a hydraulic control device for an automatic transmission for a vehicle, characterized by having a hole communicating with the lower surface of the valve body.