JPS6039568Y2 - Transmission case breather device - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a breather device for a transmission case in a family motorcycle or other two-wheeled motor vehicle.

Conventionally, this type of device has a breather hole on the lower edge of the transmission case that extends between the front engine and the rear wheels, which communicates the inside of the case with the outside air, and which performs water drainage and other functions. However, in this case, the hole is generally simply a through hole in the vertical direction of the lower wall of the case, and in such cases, especially when the car is running underwater, the hole is For example, if the transmission mechanism is a belt type, water may enter the inside of the transmission mechanism, causing problems such as slipping of the belt.

The purpose of the present invention is to obtain a device that does not have the above disadvantages.
A breather hole 2 at the lower edge of the case 1 that communicates the inside of the case 1 with outside air.
In this case, a rib 3 projecting downward is formed on the lower edge of the case 1, and the breather hole 2 is provided near the root of the rib 3 so as to open rearward.

In the illustrated case, the case 1 extends from the engine at the front to the side of the wheels 4 at the rear, and its interior is divided into a bellcon case 1a at the front and a transmission case 1b at the rear. The rib 3 integrally projects downward from its lower edge, and the breather hole 2 is provided in the upper part of the rib 3 so as to open toward the rear so as to communicate the inside of the bellcon case 1a with the outside air.

More specifically, the breather hole 2 consists of a groove in the front-rear direction on the side surface of the case body constituting the case 1, and the mission cover is inserted into the side surface through a backing 5, as shown in FIG. 6 and the bellcon cover 8 via the backing 7 are sequentially superposed and connected to each other at the lateral ports 9, so that the outer surface of the groove is closed by the backing 5 and the above-mentioned Breather hole 2 is now created.

As clearly shown in FIG. 2, the hole 2 is constructed to gradually narrow toward the rear to prevent water from entering as much as possible.

To explain its operation, the hole 2 communicates the inside of the case 1 with the outside air and functions for draining water and other functions.This point is not particularly different from conventional ones, but it is used when a car runs underwater. Considering, the aforementioned ribs 3 deflect water downward, thus preventing water from being introduced into the hole 2, in other words, allowing water to enter into the case 1. Prevented.

In this way, according to the present invention, the breather hole 2 is provided with a rearward opening at the root side of the rib 3 that projects downward, and when traveling underwater, the rib 3 acts to deflect water downward, In this way, ice does not enter through the holes 2, and the structure is simple and has the advantage of being inexpensive.

[Brief explanation of drawings]

Figure 1 is a rear perspective view of one example of the proposed device, Figure 2 is a front view of the main body of the transmission case, Figure 3 is a partially cutaway rear view, and Figure 4 is an enlarged view of the main parts. FIG. 1... Transmission case, 2... Breather hole, 3... Rib.

Claims (1)

[Scope of utility model registration request] In a transmission case or other transmission case 1 having a breather hole 2 on the lower edge thereof to communicate the inside of the case 1 with the outside air, a rib 3 projecting downward is formed on the lower edge of the case 1 and A breather device for a transmission case in which a breather hole 2 is provided near the root of a rib 3 so as to open rearward.