JPS6216525Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a hydraulic system for an automatic transmission, specifically a housing that houses a torque converter, and a transmission case that houses a gear group and a clutch group. The present invention relates to a hydraulic system for an automatic transmission, in which an oil pump for supplying oil to an actuator is disposed at a connecting portion of the actuator.

Generally, in this type of hydraulic system for an automatic transmission, a mounting flange that protrudes radially outward from the transmission case is connected to the end of the transmission case that butts against the housing. While the pump body of the oil pump is assembled to the flange, a suction passage and a discharge passage communicating with a suction chamber and a discharge chamber of the pump provided in the pump body, and a supply/discharge passage to the actuator of the clutch group are provided. However, in the structure described above, the radial dimension of the transmission case increases due to the continuous installation of the mounting flanges, which not only increases the size of the automatic transmission, but also Even if it is desired to arrange the starter motor on the outer periphery of the engine case, the motor is far away from the engine crankshaft in the radial direction. There was a problem that interlocking connections were extremely difficult.

The present invention was devised in view of these circumstances, and its purpose is to effectively utilize the flange of the stator shaft that constitutes the torque converter, and to combine the transmission case and torque converter with an extremely simple structure. It is an object of the present invention to provide a hydraulic system for an automatic transmission that can shorten the radial and axial dimensions of a housing.

Therefore, the present invention includes a housing that houses a torque converter, and a transmission case that houses a gear group and a clutch group, and an oil pump that supplies oil to the actuator at a joint between the housing and the transmission case. In the hydraulic system for an automatic transmission, an inner wall protruding inward is integrally formed at an end of the housing connected to the transmission case, and a pump body of the oil pump is connected to an inner surface of the inner wall. and a flange of the stator shaft is disposed inside the inner circumferential surface of the inner wall, and a side surface of the flange is brought into contact with the pump body, and a suction passage is formed in the inner wall in the pump body and the transmission case. and a suction relay passage, a discharge relay passage, and a supply/discharge relay passage communicating with a discharge passage and a supply/discharge passage to the actuator, and a supply/discharge passage to the actuator, the one end of which is formed in the flange of the stator shaft and the pump body. The present invention is characterized in that a supply/discharge passage is provided, the other end of which connects to the actuator and communicates with the working chamber of the actuator.

The present invention will be described below based on embodiments shown in the drawings.

First, the automatic transmission schematically shown in FIG. 1 is a transverse engine type automatic transmission used in front-engine, front-drive automobiles. A hollow first transmission shaft 3 has a pump 11 coupled to an input shaft 10 from an engine via a pump housing 11a, and a turbine 12 of the torque converter 1 arranged on an extended axis of the input shaft 10. A one-way clutch 15 is connected to a stator shaft 14 spline-coupled to the first transmission shaft 3 and the stator 13 of the torque converter 1 disposed around the outer periphery of the first transmission shaft 3.
It is supported so that it can rotate in only one direction.

Reference numeral 30 denotes a second transmission shaft that is directly connected to the input shaft 10 via a lock-up clutch C ₃ and directly drives a planetary gear group 4b, which will be described later. A clutch housing 31 is provided that is loosely inserted into the hollow portion and extends in the radial direction of the torque converter 1 within the gap between the turbine 12 and the pump housing 11a at the end of the second transmission shaft 30 on the input shaft 10 side. The lock-up clutch _C3 is assembled between the outer peripheral edge of the clutch flange 31 and the pump housing 11a.

4a is the first clutch _C1 that operates during forward gear shifting.
Clutch group 4b is _a planetary gear group having a plurality of gears, and these clutch group 4a and planetary gear group 4b are the transmission gears assembled into the housing 2. It is housed in case 5.

The planetary gear group 4b is spline-coupled to the shaft end of the second transmission shaft 30 with a pair of large and small sun gears 41 and 42 rotatably supported near the shaft end of the second transmission shaft 30. A planetary carrier 43, and first and second planetary gears 44, 4 rotatably supported by the carrier 43 via a shaft rod.
5 and a ring gear 46, the small sun gear 42 is connected to the clutch group 4a.
The large sun gear 41 is connected to the first transmission shaft 3 by the operation of the first clutch C ₁ of the clutch group 4a, and the large sun gear 41 is connected to the first transmission shaft 3 by the operation of the second clutch C ₂ of the clutch group 4a. and the second
The clutch _C2 is fixed to the transmission case 5 by actuation of a first brake _B1 disposed on the outer periphery of the clutch C2.

Further, the planetary carrier 43 is a multi-plate type second carrier.
It is fixed to the transmission case 5 by actuation of brake _B2 , and rotation in one direction is prevented by actuation of sprag type one-way clutch F.

The second brake _B2 is operated during manual gear shifting, whereas the one-way clutch F is operated during automatic gear shifting, and the first to third clutches _C1 , _C2 , _C3 and the first, The operation of the second brakes B ₁ and B ₂ and the internal pressure of the hydraulic oil in the torque converter 1 are controlled by pressurized oil from the oil pump 6, respectively.

The oil pump 6 includes a pump body 60 and a drive gear 61 that is installed inside the pump body 60 and interlocks with the pump 11 of the torque converter 1.
and a driven gear 6 that meshes with the drive gear 61.
2, the driven gear 62 is rotated by the rotation of the drive gear 61 accompanying the drive of the pump 11 of the torque converter 1 to pressurize the oil and send it to the outside.

Further, 32 is a ring gear 46 of the planetary gear group 4b.
An output shaft 33 connected to the planetary gear group 4b is a connecting shaft disposed parallel to the output shaft 32 radially outward of the planetary gear group 4b, and one end of the connecting shaft 33 and the output shaft 32 are connected to the first , and second output gears 34a and 34b, and the other end of the connecting shaft 33 is interlocked and connected to a differential gear device 36 via first and second reduction gears 35a and 35b.

Therefore, the present invention provides the transmission case 5 of the housing 2 in which the torque converter 1 is housed.
an inner wall 2 projecting radially inwardly at the joining end to
0, a pump body 60 of the oil pump 6 is coupled to the inner surface of the inner wall 20, and the pump body 60 is coupled to the inner circumferential surface of the inner wall 20.
The flange 16 of the stator shaft 14 facing the
On the other hand, suction passages 71a, 71b, discharge passages 72a, 72b, and supply/discharge passages 73, 74, 7 to the actuator are provided in the inner wall 20, which are formed in the pump body 60 and the mission case 5.
5, 76, a suction relay passage 81, a discharge relay passage 82, and supply/discharge relay passages 83, 84,
85 and 86 were installed.

In the embodiment shown in the figure, the mission case 5
A suction passage 7 is provided in the wall portion and communicates with the strainer of the valve body 50 assembled to the transmission case 5.
1a, a discharge passage 72a connected to the switching valve of the valve body 50, and the first and second clutches C ₁ and C ₂ of the clutch group 4a and the lock-up clutch C ₃ connected to the switching valve of the valve body 50. First to fourth supply and discharge passages 73a, 74a, 75 for supplying and discharging oil to the torque converter 1, respectively
a, 76a are provided.

The pump body 60 also includes a suction passage 71b connected to the suction chamber _S1 of the pump and a discharge passage 72b connected to the discharge chamber _S2 of the pump,
The first and second clutches C ₁ of the clutch group 4a,
C ₂ , lock-up clutch C ₃ and torque converter 1 through first to fourth supply/discharge passages 73b, 74b, 75b, 76b for supplying and discharging oil, respectively.
At the same time, the flange 16 of the stator shaft 14 that is in contact with the pump body 60 also has first through fourth holes formed on the pump body 60 at one end.
It is connected to the supply and discharge passages 73b, 74b, 75b, and 76b, and the other end is connected to the first and second clutches C ₁ and C _{2 .}
First to fourth supply/discharge passages 73c, 74c, 75c, and 76c are provided which communicate with the lockup clutch _C3 and the working chamber of the torque converter 1, respectively.

In the inner wall 20 of the housing 2, there is a suction relay passage 8 that connects the suction passage 71a on the mission case side and the suction passage 71b on the pump body side.
1, a discharge relay passage 82 connecting the discharge passage 72a on the mission case side and the discharge passage 72b on the pump body side, and the first to fourth supply/discharge passages 73a, 74a, 75a, 76a on the mission case side and the pump body side. The first to fourth supply and discharge passages 73b, 74
b, 75b, 76b are provided.

In the figure, 63 indicates a pump body plate, and 51 indicates an oil pan.

Further, reference numeral 9 indicates a starter motor disposed around the outer periphery of the transmission case 5.

As described above, according to the present invention, an inwardly protruding inner wall is integrally formed at the end of the housing housing the torque converter that is connected to the transmission case, and the pump body of the oil pump is connected to the inner surface of the inner wall. , and a flange of the stator shaft is disposed inside the inner peripheral surface of the inner wall, and a side surface of the flange is brought into contact with the pump body, and a suction passage formed in the pump body and the transmission case is formed in the inner wall. A suction relay passage, a discharge relay passage, and a supply/discharge relay passage communicating with a discharge passage and a supply/discharge passage to the actuator are provided, and one end is formed in the flange of the stator shaft and the supply/discharge passage to the actuator is formed in the pump body. By providing a supply/discharge passage whose other end communicates with the working chamber of the actuator, the radial dimension of the transmission case and housing can be made smaller than before, and the starter motor can be connected to the outer periphery of the transmission case. It goes without saying that the motor can be easily interlocked and connected to the crankshaft of the engine, and by effectively utilizing the flange of the stator shaft, it is possible to connect the actuator with a supply/discharge passage formed in the pump body, for example. Compared to the case where a separate wall with a supply/discharge passage connecting the working chamber is provided, the axial dimension of the automatic transmission can be shortened with a simple configuration, and the automatic transmission can be made smaller overall. It's ivy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram thereof, FIGS. 2 to 4 are enlarged sectional views of main parts, and FIG. 5 is a partially omitted side view of the housing. DESCRIPTION OF SYMBOLS 1...Torque converter, 16...Stator shaft flange, 2...Housing, 20...Inner wall, 4a...Clutch group, 4b...Gear group, 5...
...Mission case, 6...Oil pump, 60
... Pump body, 81 ... Suction relay passage, 82
...Discharge relay passage, 83-86... Supply and discharge relay passage.

Claims (1)

[Scope of utility model registration request] An automatic transmission comprising a housing in which a torque converter is housed, and a transmission case in which a gear group and a clutch group are housed, and an oil pump for supplying oil to an actuator is disposed at a joint between the housing and the transmission case. In the hydraulic device, an inner wall protruding inward is integrally formed at an end of the housing connected to the transmission case, a pump body of the oil pump is connected to an inner surface of the inner wall, and a pump body of the oil pump is connected to an inner surface of the inner wall. A flange of the stator shaft is disposed inside the inner circumferential surface, and a side surface of the flange is brought into contact with the pump body, while a suction passage, a discharge passage, and the actuator formed in the pump body and the transmission case are formed on the inner wall. A suction relay passage, a discharge relay passage, and a supply/discharge passage are provided that communicate with the supply/discharge passage to the actuator, and one end is connected to the supply/discharge passage to the actuator formed in the pump body, and the other end is connected to the flange of the stator shaft. A hydraulic system for an automatic transmission, characterized in that the actuator is provided with a supply/discharge passage communicating with the working chamber of the actuator.