JPH0384253A - Breather device for transmission - Google Patents

Abstract

PURPOSE:To improve rigidity of support of a transmission to a diff case by a method wherein reinforcing ribs for connecting the outside of a case are formed to the transmission case so as to improve support rigidity of the diff case. CONSTITUTION:A diff case 12 is mounted to a transmission case 10 of a transmission 2, and reinforcing ribs 14-1 and 14-2 for connecting the outside of a case are mounted to the transmission case 10 so as to improve support rigidity of the diff case 12. The reinforcing ribs 14-1 and 14-2 causes improvement of rigidity of support of the transmission case to the diff case 12, and air in the diff case 12 is bled through breather passages 16 in the reinforcing ribs 14-1 and 14-2.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a breather device for a transmission;
In particular, it relates to a transmission breather device that bleeds air inside the transmission and adjusts the pressure difference between the inside and outside of the transmission [Prior art] A transmission breather device generally includes a breather chamber formed in a transmission case and a breather It consists of a hole that communicates between the chamber and the outside of the transmission case, and a breather plug that can be opened and closed to close the hole, and vents air from inside the transmission to adjust the pressure difference between the inside and outside of the transmission.

As the breather device, there is one disclosed in Japanese Utility Model Publication No. 83-42218. The breather device for a transmission disclosed and shown in this publication is provided with a transmission rod that penetrates the transmission and whose outer end is connected to a transmission lever, and is controlled at the inner end of the transmission rod to enable rotational and axial movement. The rods are connected, and a passage is provided inside the control rod to communicate the axial space with the inside of the transmission case, and the space is opened to the outside of the transmission case at the top, and the inside of the control rod of the transmission mechanism is connected to the breather device. It is being used as part of the project to make effective use of the space.

[Problems to be Solved by the Invention] By the way, in conventional transmission breather devices, in order to prevent transmission oil from flowing out together with air when air is removed from the transmission case, an oil leakage prevention area is provided. must be formed on the inner peripheral surface of the transmission case.

In addition, there is also a transmission case in which a dedicated breather chamber is integrally formed within the transmission case, and air is removed from this breather chamber.

However, by integrally forming the weir and breather chamber inside the transmission case, the configuration of the transmission case becomes complicated, making it difficult to manufacture and increasing the manufacturing cost. There is a disadvantage that the space inside cannot be used effectively.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned disadvantages, the object of the present invention is to provide a differential case in the transmission case of the transmission, and to provide the transmission case with reinforcing ribs connecting the outside of the case in order to increase support rigidity of the differential case. By providing a breather passage within the rib, one end of which is closed and the other end communicates with the inside of the differential case, the reinforcing rib can improve the supporting rigidity of the differential case with respect to the transmission case. To provide a breather device for a transmission that can bleed air, has a simple structure, is easy to manufacture, and can be manufactured at low cost.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a breather device for a transmission that bleeds air in the transmission and adjusts the pressure difference between the inside and outside of the transmission. The case is provided with a differential case, and the transmission case is provided with a reinforcing rib that connects the outside of the case in order to increase supporting rigidity of the differential case, and within this reinforcing rib is provided a breather passage whose one end is closed and the other end communicates with the inside of the differential case. It is characterized by

[Operation] With the structure described above, the reinforcing ribs that connect the outside of the case to the transmission case improve the support rigidity of the differential case to the transmission case, and the breather passage in the reinforcing ribs improves the support rigidity inside the differential case. This method removes air from the air and keeps the cost low.

[Examples] Examples of the present invention will be described in detail below based on the drawings.

1 to 5 show embodiments of this invention. Third
In the figure, 2 is a vehicle transmission, and 4 is, for example, a reduction gear/front wheel differential.

The transmission 2 includes an input shaft 6 that inputs driving force from an internal combustion engine (not shown), and a counter shaft 8 that transmits the rotational force of the input shaft 6 to the differential 4. A transmission gear group and a sleeve group (not shown) are respectively fixed to the shaft 8.

Further, the differential case 12 of the differential 4 is provided on the transmission case 10 of the transmission 2, and the outside of the case is connected to the transmission case 10 by a reinforcing rib 14 in order to increase the supporting rigidity of the differential case 12.

As shown in FIG. 1, the reinforcing ribs 14 are provided at two locations, for example, at the upper and lower portions of the transmission case 10, and include a first reinforcing rib 14-1 at the upper portion and a second reinforcing rib 14-2 at the lower portion. It consists of two pieces.

A breather passage 1 has one end closed within the first reinforcing rib 14-1 and the other end communicates with the inside of the differential case 12.
6 will be provided. That is, one end of the breather passage 16 is connected to the transmission case 1 and is closed by the transmission case 10.

Further, a first reinforcing rib 14-1 has a first reinforcing rib 14-1.
As shown in the figure, the breather passage 16 and the first reinforcing rib 1
A hole 18 communicating with the outside of the transmission case 10 is bored, and a breather cap 20 for adjusting the pressure difference between the inside and outside of the transmission case 10 to a desired state is attached to the hole 18.

Next, the effect will be explained.

The breather cap 20 reliably exhausts only the air flowing into the breather passage 16 to the outside of the transmission case IO without causing the transmission oil in the transmission case 10 to flow out, and reduces the pressure difference between the inside and outside of the transmission case 10. Adjusted to desired state.

As a result, the first and second reinforcing lips 14-1.14-
2 can improve the supporting rigidity of the differential case 12 with respect to the transmission case 10, which is advantageous in practice.

In addition, the breather passage 18 in the first reinforcing lip 4-1
Differential case 1 by breather cap 20
By removing air from inside 2, there is no need to install a breather device separately from the transmission case 10 and differential case 12, the transmission case 10 does not become large, space in the engine room can be used effectively, and the structure It is economically advantageous because it is not complicated, easy to manufacture, and low cost.

[Effects of the Invention] As described in detail above, according to the present invention, the transmission case of the transmission is provided with a differential case, the transmission case is provided with a reinforcing rib that connects the outside of the case in order to increase supporting rigidity of the differential case, and the reinforcing rib is provided with a Since the breather passage is closed at one end and communicated with the inside of the differential case at the other end, the supporting rigidity of the differential case relative to the transmission case can be improved by the reinforcing ribs, which is advantageous in practice. Furthermore, by removing air from the differential case through the breather passage in the reinforcing rib, there is no need to provide a breather device separately from the transmission case or the differential case.
The transmission case does not become large, the space in the engine room can be effectively utilized, the structure is not complicated, manufacturing is easy, and the cost can be reduced, which is economically advantageous.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a left side view of the transmission, FIG. 2 is an enlarged sectional view of the breather cap, and FIG. 3 is a cutaway plan view of the main part of the transformer tip. FIG. 4 is a plan view of the transmission, and FIG. 5 is a plan view of the transmission case. In the figure, 2 is a vehicle transmission, 4 is a reduction gear/front wheel differential, 6 is an input shaft, 8 is a counter shaft, 10 is a transmission case, 12 is a differential case, 14 is a reinforcing rib, and 14-1 is a first reinforcing rib. , 14-2 is a second reinforcing rib, 18 is a breather passage, 18 is a hole, and 20 is a breather cap. Patent Applicant Suzuki Motor Co., Ltd. Representative Patent Attorney Yoshimi Saigo Figure 1 Figure 2 Figure 3 10 -2゜/

Claims (1)

[Claims] 1. In a transmission breather device that bleeds air inside the transmission and adjusts the pressure difference between the inside and outside of the transmission, a differential case is provided in the transmission case of the transmission, and the outside of the case is connected to the transmission case in order to increase support rigidity of the differential case. 1. A breather device for a transmission, characterized in that a reinforcing rib is provided, and a breather passage is provided within the reinforcing rib, one end of which is closed and the other end communicates with the inside of the differential case.