JP7085582B2 - Vehicle breather structure - Google Patents

Description

The present invention relates to a breather structure for suppressing a pressure rise in a vehicle case.

For example, various gears are housed in the case of the transmission mounted on the vehicle, but when the temperature inside the case rises due to the rotation of these gears, the internal pressure of the case rises and the oil inside the case goes out of the case. Problems such as leaking out occur.

Therefore, the vehicle is provided with a breather device as a ventilation device that allows the inside of the case to communicate with the atmosphere and suppresses a pressure increase in the case (see, for example, Patent Document 1). This breather device communicates the inside of the case with the atmosphere by opening the tip opening of the breather pipe extending from the breather hole opening at the top of the case into the atmosphere through the breather cap attached to the breather cap. It functions to suppress the rise in internal pressure due to the rise in internal temperature.

Japanese Unexamined Patent Publication No. 2019-108933

By the way, the breather pipe of the breather device needs to be opened in a place where the possibility of being flooded is low. For this reason, the breather pipe is configured to have a tip opening at a location surrounded by various devices such as an engine, a radiator, an air cleaner, and an engine mount arranged in the engine room. And the tip opening of this breather pipe should be installed as high as possible above the ground to prevent the suction of water splashed by the wheels. For that purpose, it is necessary to raise the tip of the breather pipe upward.

However, if the tip of the breather pipe is raised to a high position above, the length of the pipe will be lengthened accordingly. Further, if the length of the breather pipe is increased, the breather pipe tends to vibrate while the vehicle is running, and the breather pipe and the mounting portion (insertion portion) of the case may be easily worn.

The present invention has been made in view of the above problems, and an object of the present invention is to securely fix the tip of the breather pipe to eliminate a problem caused by vibration, and to eliminate water damage to the tip opening of the breather pipe. The purpose is to provide a breather structure for vehicles that can prevent the problem.

In order to achieve the above object, the present invention has the case (2A) by opening the tip opening of the breather pipe (8) extending from the breather hole (2a) formed in the upper part of the case (2A) into the atmosphere. It is a breather structure of a vehicle that suppresses an increase in pressure inside, and is a tip side including the tip opening of the breather pipe (8) in an assembly member (10) erected on the upper part of the case (2A). The tip portion (8A), which is a part of the above, is locked in a state of being raised upward, and at least one of the openings (10a to 10c) formed in the assembly member (10) is the breather pipe ( It is characterized in that the tip portion (8A) of the breather pipe (8) is arranged so as to be located above the tip opening portion of 8).

According to the present invention, the tip of the breather pipe is raised upward along the existing assembly member erected on the upper part of the case, and the tip is attached to the highly rigid assembly member. Vibration at the tip of the pipe is suppressed, and the problem of oil inside the case flowing out of the case from the opening at the tip of the breather pipe is prevented. Since the tip opening of the preza pipe opens at a relatively high position from the ground, the suction of the water splashed by the wheel to the breather pipe is suppressed.

Further, the water contact at the tip opening of the breather pipe is prevented by the assembly member, and the suction of water into the breather pipe is more effectively prevented. After attaching the tip of the breather pipe to the assembling member, the assembling member can be attached to the case together with the breather pipe, and these assembling properties are enhanced.

Here, the tip portion (8A) of the breather pipe (8) may be arranged between the mount portion (5) for attaching the case (2A) to the vehicle body and the assembly member (10). ..

According to the above configuration, since the tip of the breather pipe is arranged at a position surrounded by the assembly member and the mount portion, the water coverage of the tip opening of the breather pipe is further effective by both the assembly member and the mount portion. Can be prevented.

Further, another opening (10c) is formed at a position lower than the tip opening of the breather pipe (8) in the assembly member (10), and the other opening (10c) is the same. It may be arranged at the rear of the vehicle with respect to the tip end portion (8A) of the breather pipe (8) and on the opposite side of the mount portion (5).

According to the above configuration, the water contact of the tip opening of the presser pipe is more reliably prevented by the other openings of the assembly member.

Further, the assembly member (10) includes a bracket portion (11) for attaching the breather pipe (8), and the breather pipe (8) has the tip portion (8A) and the tip portion (8A). In the breather pipe (8), a portion substantially parallel to the surface of the bracket portion (11) in the tip portion (8A) and the horizontal portion (8B) is the bracket portion. It may be attached to (11). Further, in this case, the tip portion (8A) of the breather pipe (8) is attached to the bracket by the fixing tool (12) inserted into and fixed to the insertion holes (11a, 11b) formed in the bracket portion (11). The insertion holes (11a, 11b) may be attached to the portion (11) and may be provided in the front of the vehicle.

According to the above configuration, the tip of the breather pipe can be easily attached to the bracket portion by using a fixative with the tip of the breather pipe raised upward. In this case, since the bracket portion is provided on the highly rigid assembly member, the vibration of the tip portion of the breather pipe attached to the bracket portion can be suppressed.

Further, the bracket portion (11) is located below the opening (10c) formed in the assembly member (10) of the bracket portion (11) along the breather pipe (8). The extending portion (11C) is formed, and the horizontal portion (8B) of the breather pipe (8) is positioned above the extending portion (11C) and adjacent to the extending portion (11C). You may try to do it.

According to the above configuration, the extension portion of the bracket portion prevents the assembly hook from wrapping around to the lower side of the horizontal portion connected to the tip end portion of the breather pipe. Therefore, when the assembly hook lifts the breather pipe, it is possible to prevent the breather pipe from coming off or the like.
The reference numerals in the parentheses above refer to the drawing reference numbers of the corresponding components in the embodiments described later for reference.

According to the present invention, it is possible to securely fix the tip end portion of the breather pipe to eliminate the problem caused by vibration, and it is possible to prevent water from being applied to the tip opening portion of the breather pipe.

It is a partial plan view in the engine room of the vehicle provided with the breather structure which concerns on this invention. It is an enlarged detailed view of part A of FIG. FIG. 1 is a view in the direction of arrow B in FIG. It is an enlarged detailed view of the part C of FIG. It is a perspective view of the hanger plate for assembly and the pipe bracket.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a partial plan view of a vehicle having a breather structure according to the present invention in the engine room, FIG. 2 is an enlarged detailed view of part A in FIG. 1, FIG. 3 is a view in the direction of arrow B in FIG. 1, and FIG. 4 is a view. 3 is an enlarged detailed view of part C, and FIG. 5 is a perspective view of an assembly hanger plate and a pipe bracket.

As shown in FIG. 1, an engine 1 as a drive source is arranged in an engine room at the front of the vehicle, and a transmission 2 is arranged on the left side of the engine 1. Further, a radiator 3 is arranged in front of the engine 1 and the transmission 2 (the upper part of FIG. 1 is the front of the vehicle), and an air cleaner 4 is arranged above the engine 1.

Here, the left and right sides of the engine 1 and the transmission 2 are attached to the vehicle body by the mount portions (mount brackets are anti-vibration rubber, etc.) 5, but the left mount portion 5 shown in FIG. 1 is the case of the transmission 2 (transmission case). ) It is attached to the left end of 2A. Further, although only the left side portion of the engine room is shown in FIG. 1, the left front wheel 7 supported by the front suspension (hydraulic shock absorber) 6 so as to be vertically movable by the front suspension (hydraulic shock absorber) 6 is located outside the left mount portion 5. Have been placed. Although not shown, the front wheel on the right side is also supported by the front suspension so that it can move up and down.

By the way, the transmission 2 is provided with a breather device as a ventilation device for suppressing an increase in internal pressure due to a temperature rise in the case (transmission case) 2A. This breather device is an upper portion of the case 2A. It is configured by opening the tip opening of the breather pipe 8 extending from the circular hole-shaped breather hole 2a (see FIG. 2) formed in the air into the atmosphere.

More specifically, as shown in FIG. 3, a columnar boss 2B is integrally projected on the upper surface of the case 2A of the transmission 2, and a breather hole 2a (see FIG. 2) is formed in the boss 2B. ing. One end of the breather pipe 8 in the longitudinal direction is inserted into the breather hole 2a and fixed to the case 2A. Then, as shown in FIGS. 2 and 3, the breather pipe 8 rises upward from the breather hole 2a, is bent at a substantially right angle, extends diagonally to the left front, and then extends at a substantially right angle. It is bent and extends almost horizontally toward the front diagonally to the right. After that, as shown in FIGS. 3 and 4, the breather pipe 8 is bent at a substantially right angle and extends vertically upward, and the tip (state) opening at the tip of the tip rising upward thereof has a tip (state) opening. A breather cap 9 for preventing suction of water from the tip opening (hereinafter, simply referred to as an opening) is attached.

By the way, as shown in FIGS. 2 to 4, an assembly hanger plate (assembly member) 10 is vertically erected on the upper surface of the case 2A of the transmission 2, and the breather pipe 8 is one on the tip side thereof. The tip portion 8A, which is a portion, extends toward the assembly hanger plate 10. The assembly hanger plate 10 is used in a vehicle assembly factory to hook an assembly hook 20 (for example, see FIG. 4) to suspend the engine 1 and the transmission 2. For example, FIG. 5 is made of steel. It is molded into the shape shown in. Further, the assembly hanger plate 10 is attached to the upper surface of the case 2A of the transmission 2 from the beginning (when the transmission 2 is manufactured), and remains attached to the case 2A even after the assembly is completed. be.

Here, the details of the configuration of the assembly hanger plate 10 will be described with reference to FIG. 5. The assembly hanger plate 10 includes, for example, a flange portion 10A formed by bending a steel plate at a right angle and the flange portion. It is provided with two high and low vertical portions 10B and 10C that stand up vertically from 10A. The flange portion 10A of the assembly hanger plate 10 is attached to the upper surface of the case 2A of the transmission 2, and the vertical portions 10B and 10C stand up substantially vertically in the attached state.

The vertically long vertical portions 10B and 10C of the assembly hanger plate 10 are provided with vertically long elongated openings (hook holes) 10a and 10b for hooking the assembly hook 20 (see, for example, FIG. 4). , 10c are formed, respectively. The two openings 10a and 10b formed in the higher vertical portion 10B are hooks for assembling when assembling the transmission 2, and the openings 10c formed in the lower vertical portion 10C are hooked. Is for hooking the assembly hook 20 (see FIG. 4) when assembling the engine 1.

Here, the upper part of the pipe bracket 11 formed by bending a steel plate, for example, is attached to the left side surface of the vehicle at the bottom of the assembly hanger plate 10 by welding. A rectangular mounting portion 11A that is bent at a substantially right angle toward the left side of the vehicle and stands up vertically is formed on the upper portion of the pipe bracket 11, and a rectangular insertion hole 11a is formed in the mounting portion 11A. Has been done. Further, a horizontal mounting portion 11B bent at a right angle toward the left side of the vehicle is formed at the lower end portion of the pipe bracket 11, and a rectangular insertion hole 11b is also formed in this mounting portion 11B. .. Then, from the mounting portion 11B, the extending portion 11C extends horizontally and integrally toward the rear of the vehicle.

Thus, one of the tip portion 8A of the presser pipe 8 extending along the upper surface of the case 2A from the breather hole 2a (see FIG. 2) formed in the upper portion of the case 2A of the transmission 2 and the horizontal portion 8B connected to the tip portion 8A. As shown in FIGS. 2 to 4, the portions are insertion holes 11a and 11b (see FIG. 5) that rise substantially vertically along the pipe bracket 11 and are formed in the mounting portions 11A and 11B of the pipe bracket 11, respectively. It is attached to the pipe bracket 11 by a fixing tool 12 such as a clip inserted into the pipe bracket 11.

By the way, as shown in FIG. 1, the assembly hanger plate 10 and the pipe bracket 11 attached to the assembly hanger plate 10 are arranged in a place where the surroundings are surrounded by the engine 1, the radiator 3, the mount portion 5, etc. and are not easily exposed to water. Therefore, the tip portion 8A of the breather pipe 8 attached to the pipe bracket 11 in an upright position is also arranged at a position where it is difficult to be flooded.

Here, when the tip portion 8A of the breather pipe 8 is attached to the pipe bracket 11 as described above, the opening 10a formed in the assembly hanger plate 10 is located above the tip opening of the breather pipe 8. is doing. The tip portion 8A of the breather pipe 8 is arranged between the mount portion 5 on the left side of the vehicle and the assembly hanger plate 10 and the pipe bracket 11.

As described above, in the present embodiment, the tip portion 8A of the breather pipe 8 is moved upward along the pipe bracket 11 fixed to the existing assembly hanger plate 10 erected on the upper portion of the case 2A of the transmission 2. Since the tip 8A was started up and attached to the pipe bracket 11 fixed to the highly rigid assembly hanger plate 10, the vibration of the tip 8A of the breather pipe 8 was suppressed, and the oil in the case 2A was the breather pipe. It is possible to prevent the occurrence of a problem that the outflow from the tip opening of No. 8 to the outside of the case 2A. Since the tip opening of the breather pipe 8 opens at a relatively high position from the ground, the suction of the water splashed by the front wheel 7 to the breather pipe 8 is suppressed.

Further, the water on the tip opening of the breather pipe 8 is prevented by the assembly hanger plate 10 and the pipe bracket 11, and the suction of water into the breather pipe 8 is more effectively prevented. If the tip portion 8A of the breather pipe 8 is attached to the pipe bracket 11 and then the assembly hanger plate 11 is attached to the case 2A together with the breather pipe 8, the assembling property thereof is enhanced.

Further, in the present embodiment, since the tip portion 8A of the breather pipe 8 is arranged between the mount portion 5 for attaching the case 2A to the vehicle body, the assembly hanger plate 10 and the pipe bracket 11 as described above, the breather pipe The tip portion 8A of 8 is surrounded by the assembly hanger plate 10, the pipe bracket 11, and the mount portion 5, and the water cover at the tip opening of the breather pipe 8 is further covered by the assembly hanger plate 10, the pipe bracket 11, and the mount portion 5. It can be effectively prevented.

Further, in the present embodiment, the opening 10c is formed at a position lower than the tip opening of the breather pipe 8 in the assembly hanger plate 10, and the opening 10c is relative to the tip 8A of the breather pipe 8. Since it is located at the rear of the vehicle and on the opposite side of the mount portion 5, water coverage at the tip opening of the presser pipe 8 can be more reliably prevented by the opening 10c of the assembly hanger plate 10. ..

Further, in the present embodiment, the pipe bracket 11 is attached to the assembly hanger plate 10, and a fixing tool such as a clip inserted into the insertion holes 10a and 10b formed in the attachment portions 10A and 10B of the pipe bracket 11 respectively. Since the tip portion 8A and the horizontal portion 8B of the breather pipe 8 are attached to the pipe bracket 11 by 12, the tip portion 8A of the breather pipe 8 can be easily attached to the pipe bracket 11 by using the fixture 12. In this case, since the pipe bracket 11 is provided on the highly rigid assembly hanger plate 10, vibration of the tip portion 8A of the breather pipe 8 attached to the pipe bracket 11 is suppressed.

Further, an extension portion 11C extending toward the rear of the vehicle along the breather pipe 8 is formed in a portion of the pipe bracket 11 below the opening 10c formed in the assembly hanger plate 10, and the extension portion 11C is formed. A horizontal portion 8B connected to the tip portion 8A of the breather pipe 8 is located behind the vehicle of the portion 11C (see FIG. 4), and the breather pipe 8 is horizontal so as to be above the extending portion 10C and adjacent to the extending portion 10C. Part 8B is arranged. Therefore, the following effects can be obtained. That is, as shown in FIG. 4, the assembly hook 20 is prevented from wrapping around to the lower side of the horizontal portion 8B connected to the tip portion 8A of the breather pipe 8 by the extending portion 11C of the pipe bracket 11. By lifting the breather pipe 8 by 20, it is possible to prevent the occurrence of problems such as the breather pipe 8 coming off.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of claims and the technical ideas described in the specification and drawings.

1 engine 2 transmission 2A transmission case (case)
2a Breather hole 3 Radiator 4 Air cleaner 5 Mount part 6 Front suspension 7 Front wheel 8 Breather pipe 8A Breather pipe tip 8B Breather pipe horizontal part 9 Breather cap 10 Assembly hanger plate (assembly member)
10a-10c Opening of hanger plate for assembly 11 Pipe bracket (bracket part)
11A, 11B Pipe bracket mounting part 11a, 11b Pipe bracket insertion hole 12 Fixture

Claims (4)

It is a vehicle breather structure that suppresses the pressure rise in the case by opening the tip opening of the breather pipe extending from the breather hole formed in the upper part of the case to the atmosphere.
One on the tip side of the breather pipe, including the tip opening, in an assembly member erected at the top of the case , which is formed with at least one opening into which the assembly hook of the vehicle assembly plant is hooked. The tip, which is a part, is locked in a state of being raised upward, and at the same time,
The tip of the breather pipe is arranged so that at least one of the openings formed in the assembly member is located above the tip opening of the breather pipe .
The tip portion of the breather pipe is arranged between the mount portion for attaching the case to the vehicle body and the assembly member.
Another opening is formed at a position lower than the tip opening of the breather pipe in the assembly member, and the other opening is behind the vehicle with respect to the tip of the breather pipe. And, it is arranged on the opposite side of the mount portion.
The breather structure of the vehicle is characterized by that. The assembly member includes a bracket portion for attaching the breather pipe.
The breather pipe includes the tip portion and a horizontal portion connected to the tip portion.
The vehicle breather structure according to claim 1 , wherein the breather pipe has a portion substantially parallel to the surface of the bracket portion in the tip portion and the horizontal portion attached to the bracket portion . 2. The breather structure of the described vehicle. The bracket portion forms an extension portion extending along the breather pipe at a portion of the bracket portion below the other opening formed in the assembly member.
The breather structure for a vehicle according to claim 2 or 3, wherein the horizontal portion of the breather pipe is located above the extension portion and adjacent to the extension portion .

Images