JPH068085B2 - Vehicle transmission case - Google Patents

Description

The present invention relates to a vehicle transmission case.

(Prior Art) Conventionally, a transmission case 100 of a vehicle system (hereinafter, referred to as a "passenger vehicle system") designed on the assumption of traveling on a paved road has a cylindrical shape that houses a gear transmission mechanism as shown in FIG. In the above-mentioned gear speed change mechanism having the portion 101, the friction engagement element is operated by the hydraulic servo,
The components of the planetary gear set are fixed to a fixing member, or the input shaft, the output shaft or other components are connected.

On the lower surface of the cylindrical portion 101, an oil return oil passage 102 is integrally formed at the time of casting, and a control device chamber 103 for housing control devices such as a parking control device and a hydraulic control device is formed.

The transmission case 100 can be fitted with a compact extension housing in order to avoid interference with the floor and enable mounting on a large number of vehicle types.

(Problems to be Solved by the Invention) However, in the vehicle transmission case having the above-described configuration, when mounted in a vehicle system (hereinafter, referred to as “truck system”) designed to have rough land traveling capability, For example, if the four-wheel drive transfer is connected to the rear part, the strength of the joint between the transmission case 100 and the extension case, which is required due to the weight of the four-wheel drive transfer and the severe usage conditions during rough-land traveling, will be insufficient. .

Therefore, it is difficult to share the transmission case 100 between a passenger car system and a truck system.

An object of the present invention is to solve the problems of the conventional vehicle transmission case described above and to provide a vehicle transmission case that can be commonly used for transmissions of different specifications such as a passenger vehicle system and a truck system.

(Means for Solving the Problems) Therefore, in the vehicle transmission case of the present invention, a cylindrical portion for accommodating the gear speed change mechanism is provided, and a side wall and a bottom wall are provided below the rear end surface of the cylindrical portion. A substantially rectangular portion formed of is integrally formed with the cylindrical portion.

Further, an overhanging portion including an outer wall and a bottom wall is integrally formed with the cylindrical portion outside the substantially rectangular portion.

Fastening holes for other cases are formed at the rear end of the cylindrical portion, the substantially rectangular portion, and the projecting portion at a position corresponding to the specifications of the transmission.

(Operation and Effect of the Invention) According to the present invention, the cylindrical portion for accommodating the gear transmission is provided as described above, and the substantially rectangular portion including the side wall and the bottom wall is provided at the lower portion of the rear end surface of the cylindrical portion. Are integrally formed with the cylindrical portion. Further, an overhanging portion including an outer wall and a bottom wall is integrally formed with the cylindrical portion outside the substantially rectangular portion.

Then, on the rear end surface of the cylindrical portion, the substantially rectangular portion and the projecting portion, fastening holes with other cases are formed at positions corresponding to the specifications of the transmission.

Therefore, the design of the joint can be changed according to the type of case to be joined to the transmission case, and the transmission case can be shared for transmissions of different specifications with only slight processing. And productivity is improved.

(Example) Hereinafter, the Example of this invention is described in detail, referring drawings.

FIG. 1 is a front view of one end surface of a vehicle transmission case of the present invention, FIG. 2 is a side view of an automatic transmission case for four-wheel drive incorporating the vehicle transmission case of the present invention, and FIG. It is a front view of the other end surface of the extension case of the automatic transmission case for wheel drive.

The four-wheel drive automatic transmission case 1 includes an automatic transmission case 4, which includes a fluid transmission device case 2 and a vehicle transmission case 3 (hereinafter, referred to as “transmission case”) 3 in which an oil pan 30 is fastened to a lower surface, Extension case 5 with an oil pan 50 connected to the bottom surface,
A front transmission mechanism case 6, a rear transmission mechanism case 7 having a second output shaft 61, which is connected to the output shaft of the transmission at the time of four-wheel drive, protruded, and a first output shaft 81, which is always connected to the output shaft of the transmission. Transfer case 9 with extension housing 8 protruding
And each of these cases is connected by a number of bolts.

The fluid transmission device case 2 accommodates a well-known fluid transmission device such as a torque converter or a fluid coupling, a clutch, and an oil pump.

The transmission case 3 can be shared by two types of transmissions, a passenger car system and a truck system.

The transmission case 3 has a cylindrical portion 31 that accommodates the gear transmission mechanism. In the gear transmission mechanism, the friction engagement brake is operated by the hydraulic servo to operate the components of the planetary gear set. The components of the planetary gear set are fixed to the case 3 or the friction engagement clutch is operated to connect the components of the planetary gear set to the input shaft, the output shaft or other components.

On the lower surface of the cylindrical portion 31, there is formed a control device chamber for accommodating control devices such as a parking control device and a hydraulic control device.

The left and right side walls 331 and the bottom wall 32 are formed on the rear end surface of the cylindrical portion 31 that abuts the extension case 5.
A substantially rectangular portion 33 having is formed. The substantially rectangular portion 3
3 is integrally formed with the cylindrical portion 31 when the transmission case 3 is cast.

Further, skirt-shaped projecting portions 34 are integrally formed with the cylindrical portion 31 on the left and right outer sides of the substantially rectangular portion 33. The skirt-shaped projecting portion 34 is composed of an inclined wall 344 and a bottom wall 345 that form an outer wall, and the size thereof is gradually increased from the upper portion 341 to the lower portion 342.

In addition, the buildup portion 36 of the outer peripheral wall portion 35 of the cylindrical portion 31.
Bolt fastening holes 36A, 36B, 36C, 36 of bolts for fastening the transmission case 3 and the extension case 5 to the a, 36b, 36c, 36d, 36e.
D and 36E are formed. Then, the substantially rectangular portion 3
3, both side walls 331 of the bottom wall 322 of the passenger car system bolt fastening holes 37 are formed, the bottom wall 32 of the substantially rectangular portion 33.
In the built-up portion 323A of the second central portion 323, a bolt fastening hole 38A for a four-wheel drive transmission for a vehicle running on a rough land such as a truck system is formed. The four-wheel drive transmission bolt fastening hole 38A is not formed in the case of a passenger car system. Further, the built-up portion 343 of the lower portion 342 of the inclined wall 344 of the skirt-shaped projecting portion 34 has a bolt fastening hole 38B for a four-wheel drive transmission.
Is formed.

Then, the substantially rectangular portion 33 and the skirt-shaped protruding portion 3
On the lower surface of 4, there is provided an automatic transmission hydraulic control device internally provided with an automatic transmission hydraulic control device for selectively supplying / discharging hydraulic fluid to / from the friction engagement brake of the automatic transmission and the hydraulic servo of the clutch. The machine oil pan 30 is fastened. 39 is an oil return oil passage for passenger cars. Reference numeral 32 is an oil return oil passage for a four-wheel drive transmission that connects the extension case 5 and the transmission case 3 to each other.
Drilled after molding. Passenger car bolt fastening holes 37,
Bolt fastening holes 38A, 38B for 4-wheel drive transmission
May be integrally cast and molded at the time of manufacturing the transmission case 3, and after the transmission case 3 is molded, bolt fastening holes may be formed by a drill or the like. Further, the bolt fastening holes 37 for the passenger car system and the bolt fastening holes 38B for the four-wheel drive transmission may be selectively arranged according to the specifications.

As shown in FIG. 3, the extension case 5 has a cylindrical end portion 51 for accommodating a friction engagement brake and a clutch of a four-wheel drive transfer, and an upper surface 521 having a small diameter, and a lower surface for connection with the transmission case 3. 522 has a large diameter, and is integrally formed with the cylindrical portion 51 at the time of casting, and is composed of the inclined wall 52 and the bottom wall 53, and the outer peripheral wall portion 54 of the cylindrical portion 51 has a bolt fastening hole 36A of the transmission case 3, 3
Bolt fastening holes 55A, 55B, 55C, 55D, 55E formed at positions corresponding to 6B, 36C, 36D, 36E are formed, and the transmission case 3 is formed on the lower surface 552 of the inclined wall 52 and the central portion 531 of the bottom wall 53. The bolt fastening holes 56A, 56B and 56C for trucks are formed at positions corresponding to the bolt fastening holes 38A and 38B.
The transfer case 9 is firmly connected to the transmission case 3 by bolts through these bolt fastening holes, and a sufficient joint strength that can withstand rough road travel is obtained.
A transfer oil pan for accommodating a transfer valve body, in which a hydraulic control device of a transfer for selectively supplying / discharging hydraulic oil to / from a friction engagement brake of a transfer 9 and a hydraulic servo of a clutch is provided inside a lower surface of the extension case 5. 50 have been signed. Also, when mounting the extension housing for the truck system, the bolt fastening holes for the four-wheel drive transmission are also used.
Mount using A and 38B.

FIGS. 4 to 6 show an extension housing of an automatic transmission case for a passenger car system, which incorporates the vehicle transmission case of the present invention.

Also in the case of this embodiment, the rear end surface shape of the transmission case 3 is the same as that of FIG. 1, and the bolt fastening hole 38B may be formed.

The other end surface (joint surface with the transmission case 3) 8a of the extension housing 8A has a cylindrical portion 82 into which the first output shaft 81 is inserted, and the side wall 831 and the bottom wall 832 provided on the lower surface of the cylindrical portion 82. And a bolt fastening hole 85A, 85B, 85D formed at a position corresponding to the bolt fastening holes 36A, 36B, 36D, 36E of the transmission case 3 on the outer peripheral wall portion 84 of the cylindrical portion 82. , 85E,
In the bottom wall 832 of both side walls 831 of the substantially rectangular portion 83, a passenger vehicle system bolt fastening hole 86 is formed at a position corresponding to the passenger vehicle system bolt fastening hole 37 of the transmission case 3 at the time of manufacturing the extension housing 8A. Make bolt fastening holes with a drill. Further, the extension housing 8A has the other end surface 8a having a large diameter, the one end surface 8b having a small diameter, and accommodates a governor valve or an electronic sensor rotor fixed to the first output shaft 81, and a speedometer drive gear,
A bush 88 is provided on the small-diameter portion 87 on the one end face 8b side, and a sleeve portion 89 that protrudes from the small-diameter portion 87 to the left in the drawing (FIG. 6) is formed.

[Brief description of drawings]

FIG. 1 is a front view of one end surface of a vehicle transmission case of the present invention, FIG. 2 is a side view of an automatic transmission case for four-wheel drive incorporating the vehicle transmission case of the present invention, and FIG. Is a front view of the other end surface of the extension case of the automatic transmission case for four-wheel drive, FIG. 4 is a front view of the other end surface of the extension housing of the automatic transmission case for passenger car systems, and FIG. 5 is an automatic view of the passenger car system. A front view of the other end surface of the extension housing of the transmission case is shown in FIG. 6, FIG. 6 is a side sectional view of the extension case of the automatic transmission case for passenger car systems, and FIG. 7 is one end surface of the conventional transmission case for passenger car systems. It is a front view. In the figure, 1 ... 4-wheel drive automatic transmission case 3 ... Vehicle transmission case 5 ... Extension case
31 ... Cylindrical part 32, 39 ... Oil return oil passage 33 ... Substantially rectangular part 34 ... Skirt-like overhang part 37 ... Passenger car bolt fastening hole 8A ... Extension housing 38A
38B ... 4-wheel drive transmission bolt fastening hole

(72) Inventor Haruki Takemoto 10 Takane, Fujii-cho, Anjo-shi, Aichi Aisin Warner Co., Ltd. (72) Inventor Koji Sumiya, Takane Fujii-cho, Aichi-ken Aisin Warner, Inc. (72) Inventor Koji Kobayashi 10 Takane, Fujii-cho, Anjo-shi, Aichi Aisin Warner Co., Ltd. (72) Inventor Kazuaki Watanabe 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd. (72) Inventor Yoshiharu Harada 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Co., Ltd.

Claims (6)

[Claims] 1. A cylindrical portion for accommodating a gear speed change mechanism, a lower portion of a rear end portion of the cylindrical portion, which is integrally formed with the cylindrical portion and which is composed of a side wall and a bottom wall. The cylindrical portion, the substantially rectangular portion, and the protruding portion, which is integrally formed with the cylindrical portion outside the substantially rectangular portion and has an overhanging portion including an outer wall and a bottom wall. A vehicle transmission case characterized in that a fastening hole for connecting to another case is formed on a rear end surface of the rear case at a position corresponding to a transmission specification. 2. The transmission case for a vehicle according to claim 1, wherein the projecting portion is integrally formed on a side wall of the substantially rectangular portion. 3. The vehicle transmission case according to claim 2, wherein the outer wall is an inclined wall, and the projecting portion has a skirt shape. 4. A transmission case for a vehicle according to claim 3, wherein the rear end surfaces of the substantially rectangular portion and the projecting portion are flush with the rear end surface of the cylindrical portion. 5. The vehicle transmission according to claim 4, wherein the rear end surface of the cylindrical portion and the rear end surfaces of the substantially rectangular portion and the projecting portion are provided with a plurality of built-up portions. Case. 6. The vehicle transmission case according to claim 5, wherein the padding portion is provided with a bolt fastening hole.