JPS631081Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an automatic transmission system for an automobile, specifically, a housing housing a torque converter and a transmission case housing a hydraulically operated automatic transmission mechanism are formed separately, and these housings and a transmission case are formed separately. The present invention relates to an automatic transmission device for an automobile in which mating surfaces are provided on each transmission case and these mating surfaces are coupled in an abutting manner.

Conventionally, in this type of automatic transmission, a valve body containing a manual valve or a pressure regulator valve that controls hydraulic fluid for operating the transmission mechanism is attached to the lower surface of the outer wall of the transmission case. , and the body is covered with an oil pan. However, according to the automatic transmission of the above structure, it is necessary to separately manufacture the oil pan, and also to install the oil pan. Since the hole must be formed in the transmission case, there is a problem in that the process of cutting the mounting hole and the process of installing the oil pan are increased.

In addition to the above transmission, an automatic transmission has also been developed in which an oil passage is formed on the mating surface side of the housing and the valve body is attached to the housing. In order to guide the hydraulic oil flowing through the oil passage formed on the mating surface side of the housing to the automatic transmission mechanism in the transmission case, the oil passage is made a U-turn toward the transmission case side, and the transmission mechanism Therefore, there were problems such as the oil passage becoming longer than necessary and becoming structurally complicated.

The present invention was developed in view of the above circumstances, and aims to reduce the number of parts and improve ease of assembly, while also improving the oil passageway that connects the transmission mechanism and oil pump to the valve body. Our goal is to provide an automatic transmission that can shorten the time.

Therefore, in the present invention, the housing housing the torque converter and the transmission case housing the transmission mechanism are formed separately, and mating surfaces are provided on each of the housing and the transmission case, and these mating surfaces are butted. In an automatic transmission for an automobile, the oil pump is disposed near the mating surface of one of the housing and transmission case, and the oil pump is disposed near the mating surface of the case, and the oil pump is connected to the transmission mechanism on the mating surface side of the case. A valve body including an oil passage portion having an oil passage for supplying and discharging hydraulic oil from a pump and a first partition wall surrounding the oil passage portion, and having an oil passage that matches the oil passage of the oil passage portion. is attached to the oil passage portion, and a second partition portion is integrally formed on the mating surface side of the housing to be coupled to the first partition portion in an abutting manner, so that the housing is coupled to the transmission case. Accordingly, the oil storage chamber is characterized in that the first partition wall portion and the second partition wall portion define an oil storage chamber.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the drawings.

In the figure, 1 is a housing, and 2 is a transmission case. The housing 1 and the transmission case 2 are formed separately, and are provided with mating surfaces 1a and 2a, respectively, and these mating surfaces 1a and 2a are butted. This ties them together as one.

A torque converter 3 having an input shaft 3a interlockingly connected to the drive shaft of the engine is disposed inside the housing 1 on the extension axis of the drive shaft, and the torque converter 3 is connected to the drive shaft of the engine. The rotational power is transmitted to the transmission shaft 4 installed horizontally in the transmission case 2, while the transmission shaft 4 is provided adjacent to the torque converter 3 and near the mating surface 1a. An oil pump 5 is provided which is rotationally driven by the input shaft 3a of the torque converter 3.

Further, on the output shaft 11 that interlocks with the transmission shaft 4 within the transmission case 2, a reduction gear device A, which will be described later, is provided, while on the radially outer side of the output shaft 11, the transmission case 2 and the housing are connected. 1 is equipped with a differential gear device B having a drive axle 6 parallel to the output shaft 11, a large reduction gear 7, and other gear groups. The rotary power is reduced in speed by the reduction gear device A and then transmitted.

Furthermore, a planetary gear unit C is provided within the transmission case 2 around the transmission shaft.

This planetary gear device C has an input sun gear 9 fitted and fixed onto the transmission shaft 4, a low sun gear 10 on both left and right sides adjacent to the gear 9, and a hollow output shaft 11 on the right side of the shaft center. A long pinion 13 is loosely fitted with a planetary carrier 12 formed to extend in a shape, and meshes with the input sun gear 9 on the carrier 12;
A short pinion 14 that meshes with the long pinion 13 and meshes with the long pinion 13 is supported by shaft rods 15 and 16, and a reverse ring gear 17 that meshes with the short pinion 14 is provided around the outer periphery of these planetary gear groups. At a location facing the planetary carrier 12, a parking lock gear 18 is supported by the protruding ends of the shaft rods 15, 16.

A multi-stage friction plate type reverse clutch 19 is interposed between the outer periphery of the reverse ring gear 17 and the inner wall surface of the transmission case 2.

Further, a piston 20 is provided on the right side of the planetary carrier 12, and the piston 20 is moved forward and backward by pressure oil from the oil pump 5 to operate the reverse ring gear 17 on and off via the reverse clutch 19. It consists of

Furthermore, a clutch drum 21 is loosely fitted around the transmission shaft 4 on the left side of the planetary gear group, and an oil passage 22 formed through the transmission shaft 4 from the oil pump 5 is formed in this drum 21. A piston 23 that can move forward and backward by pressure oil supplied through the piston 23 is inserted, and on the right side of the piston 23, a piston 23 is inserted between the inner wall surface of the clutch drum 21 and the clutch hub 24 that is fitted and fixed to the transmission shaft 4. A multi-stage friction plate type clutch 25 is installed, and the clutch drum 2
A clutch flange 26 is provided at the right end of the clutch drum 21 and engages with the low sun gear 10, and a brake is provided on the outer periphery of the clutch drum 21 to fix or free the drum 21 using pressure oil. A band 27 is provided.

Also, between the output shaft 11 and the differential gear device B, the housing and the transmission case 1,
An idle shaft 28 is installed between the two walls, first and second reduction gears 29 and 30 are rotatably supported on this idle shaft 28, and the first reduction gear 29 is spline-fitted to the output shaft 11. and the second reduction gear 30 is meshed with the large reduction gear 7 of the differential gear device B,
The aforementioned reduction gear device A is constituted by a first reduction mechanism including the reduction gear 31 of the output shaft 11 and the first reduction gear 29, and a second reduction mechanism including the second reduction gear 30 and the large reduction gear 7. ing.

Therefore, the present invention provides a mating surface 2a of the transmission case 2 of the automatic transmission having the above structure.
An oil passage portion 40 flush with the mating surface 2a is located on the side and below the attachment portion of the reduction gear 31.
A first partition wall 42 surrounding the oil passage 40 is integrally formed, and the clutch 1 is connected to the oil passage 40.
Pistons 20, 23 for operating 9, 25
and an oil passage 41 that communicates with a piston (not shown) for actuating the brake band 27, and is connected to the first partition wall 42 on the mating surface 1a side of the housing 1 in an abutting manner. The second partition part 50 is integrally formed with the housing 1.
With the coupling to the transmission case 2, the first partition wall part 42 and the second partition wall part 50 define an oil storage chamber S.

In addition, one side 60a of the valve body 60, which incorporates a manual valve 61 operated by the operation of a control lever (not shown) in the vehicle interior, and a pressure regulator valve 62 for adjusting the oil pressure of the oil pump 5, is provided with the above-mentioned valve body 60. Oil passage 6 matching oil passage 41
3, and the valve body 60 is connected to the oil passage portion 40 of the transmission case 2 so that the oil passage 63 and the oil passage 41 of the oil passage portion 40 formed in the transmission case 2 communicate with each other. It is fixed via a plate 65, and the pressure oil supplied from the oil pump 5 is connected to both the valves 6.
1 and 62, the oil passage 41,
63, the clutches 19, 25 and band brake 27 are actuated at any time to effect a speed change.

In the figure, 66 is a strainer provided in the valve body 60, and the hydraulic oil stored in the oil storage chamber S is returned to the oil pump 5 via the strainer 66.

According to the automatic transmission device for an automobile having the above configuration, the oil passage section 40 includes the oil passage 41 for sending the pressure oil supplied from the oil pump 5 to each part of the transmission mechanism described above. is integrally formed on the mating surface 2a side of the transmission case 2, so that the oil passage portion 40 and the oil passage 41 can be formed at the same time when the transmission case 2 is molded, and therefore the oil passage 41 can be formed again. There is no need for a forming process.

Moreover, since the oil passage 41 is formed on the transmission case 2 side, the oil passage 41 and the various parts of the transmission mechanism installed inside the transmission case 2, that is, the clutches 19 and 25, can be operated. Not only can the connecting path connecting the pistons 20, 23 and the piston (not shown) for actuating the brake band 27 be the shortest distance, but there is no need to make a U-turn in the connecting path as in the conventional case. Moreover, since the oil pump 5 that supplies hydraulic oil to the valve body 60 is located near the mating surface 1a in the housing 1, there is no communication path connecting the oil pump 5 and the valve body 60. It can also be made shorter.

Further, with the assembly of the housing 1 to the transmission case 2, the first partition wall portion 42
and the second partition wall 50, the oil storage chamber S
Since the oil pan is defined, there is of course no need to separately form an oil pan as in the conventional case, and the process of assembling the oil pan is also unnecessary.

As described above, in the present invention, the housing housing the torque converter and the transmission case housing the transmission mechanism are formed separately, and mating surfaces are provided on each of the housing and the transmission case. In an automatic transmission device for an automobile that is coupled in a butt-like manner, an oil pump is disposed near the mating surface of one of the housing and the transmission case, and the transmission mechanism is connected to the transmission case on the mating surface side of the case. An oil passage section equipped with an oil passage for supplying and discharging hydraulic oil from an oil pump, and a first oil passage section surrounding the oil passage section.
A valve body having a partition wall portion and an oil passage that matches the oil passage of the oil passage portion is attached to the oil passage portion, and the first valve body is provided on the mating surface side of the housing.
A second partition wall portion is integrally formed with the partition wall portion in abutting manner, and an oil storage chamber is defined by the first partition wall portion and the second partition wall portion as the housing is coupled to the transmission case. By doing this, it is possible to shorten the oil passage connecting the transmission mechanism or oil pump to the valve body, and furthermore, by simply assembling the housing to the transmission case, the first
Since the partition wall portion and the second partition wall portion are combined to simultaneously define an oil storage chamber serving as an oil reservoir,
Of course, there is no need to prepare a separate oil pan as in the past, and there is no need to form an oil pan mounting hole in the transmission case.
Overall, the number of processing steps and assembly steps can be reduced, as well as the number of parts.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the automatic transmission of the present invention, Figure 2 is a sectional view of the main parts, Figure 3 is a right side view of the transmission case, Figure 4 is a left side view of the housing, and Figure 5 is a sectional view of the automatic transmission. is a left side view of the valve body. DESCRIPTION OF SYMBOLS 1...Housing, 2...Transmission case, 3...Torque converter, 40...Oil passage section, 41...Oil passage, 60...Valve body, 6
3...Oil road.

Claims (1)

[Scope of utility model registration request] A housing containing a torque converter and a transmission case containing a transmission mechanism are separately formed, mating surfaces are provided on each of the housing and the transmission case, and these mating surfaces are joined in abutting manner. In an automatic transmission for an automobile, an oil pump is disposed near the mating surface of one of the housing and the transmission case, and hydraulic oil from the oil pump is provided to the transmission mechanism on the mating surface side of the case. An oil passage portion having an oil passage for supplying and discharging oil and a first partition wall surrounding the oil passage portion are provided, and a valve body having an oil passage that matches the oil passage of the oil passage portion is provided in the oil passage portion. At the same time, a second partition part is integrally formed on the mating surface side of the housing and is coupled to the first partition part in an abutting manner, so that when the housing is coupled to the transmission case, the second partition part is integrally formed with the mating surface side of the housing. An automatic transmission device for an automobile, characterized in that an oil storage chamber is defined by the part and the second partition part.