JP2545033Y2 - Open end member of vacuum switching valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum switching valve (hereinafter abbreviated as VSV) used for switching between a four-wheel drive and a two-wheel drive of an automobile.

[0002]

2. Description of the Related Art For example, in a VSV used for switching between a four-wheel drive and a two-wheel drive of an automobile, a VSV hose is connected to an air opening thereof, and a hose tip is pulled up to an upper part in an engine room. As shown in FIG.
Atmospherically open end member 32 having an air suction passage 33 is attached to the end of hose 31, and this air open end member 32 is mounted in a mounting hole 35 provided in fender apron 34, and the open end of air suction passage 32 is connected to fender apron 34. And open in the space 36 surrounded by the fender liner so that water and the like are not sucked into the VSV air opening port together with the suctioned air.

The means for mounting the open-end member 32 to the fender apron 34 is elastically deformed and
A plurality of elastic members in the circumferential direction are formed, which project radially outward toward the rear end side so as to penetrate through the mounting hole 35 and which is formed near the front end thereof and engages with the opening edge of the mounting hole 35. It is composed of an engaging portion 37 and a receiving portion 39 which comes into contact with the periphery of the mounting hole 35 without penetrating the mounting hole 35, and is configured to be easily mounted by being pushed into the mounting hole 35 from inside the engine room 40. ing.

[0004]

However, in the configuration shown in FIG. 4, the water that has entered the engine room 40 flows along the fender apron 34 as indicated by the arrow, and As a result, the air may flow out to the outer surface of the elastic engaging portion 37 and reach the open end of the air suction passage 33. In this state, when the air is sucked from the air opening of the VSV, water is sucked together with the air. there were.

In view of such a conventional problem, the present invention provides a VSV air-open end member which does not have a risk of inhaling water even when water flows along a mounting plate having a mounting hole. The purpose is to provide.

[0006]

According to the present invention, there is provided a cylinder having an atmosphere suction passage and a base end of which is connected to an atmosphere opening port of a vacuum switching valve via a hose, and an intermediate portion of the cylinder. A receiving portion that contacts the periphery of the mounting hole formed in the mounting plate and an elastic engaging portion that elastically deforms through the mounting hole and engages with the mounting plate. And a flange for draining water is provided on the outer periphery at the position.

[0007]

According to the air opening end member of the present invention, when the mounting plate is inserted into the mounting hole of the mounting plate from the distal end portion, the mounting plate is easily clamped between the receiving portion and the elastic engaging portion. And the water draining flange is provided at an appropriate distance from the distal end of the cylindrical body, so that the water flowing down the mounting plate flows from the elastic engaging portion toward the distal end of the cylindrical body. Even in such a case, the flange can reliably prevent the end of the cylindrical body from reaching, and the air is opened together with the air when the air is opened from the air suction passage by opening the VSV air opening. Can be reliably prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a VSV used in a switching device for switching between four-wheel drive and two-wheel drive will be described below with reference to FIGS.

As shown in FIG. 3, a drive system of an automobile which can switch between four-wheel drive and two-wheel drive inputs an output of an engine 1 to a transfer 3 via a transmission 2 and transfers the output from the transfer 3 to the front and rear. It is configured to transmit power to the wheel differentials 4,5. Transfer 3 has 4 wheels and 2
A fork shaft 6 for switching the drive of the wheels and a diaphragm type actuator 7 for switching the position are provided. The chambers 8a and 8b on both sides of the diaphragm in the actuator 7 are respectively VSV9 (9
a, 9b). Each VSV 9 (9a, 9
In (b), a negative pressure is introduced from an intake pipe 10 of the engine 1 and an atmosphere opening port 11 is provided at each of the chambers. The chambers 8a and 8b of the actuator 7 corresponding to the switching signals from the changeover switch 12 respectively. Is reciprocally suctioned to the negative pressure or opened to the atmosphere, and the position of the fork shaft 6 is switched.
It is configured to switch between four-wheel drive and two-wheel drive. Reference numeral 13 denotes a switching signal power supply.

A VSV hose 14 is connected to an atmosphere opening port 11 of the VSV 9, and an atmosphere opening end member 15 is connected to a tip of the VSV hose 14 as shown in FIG.
The VSV hose 14 has its distal end pulled up to the upper part in the engine room 16, and the open end member 15 at the distal end is mounted in a mounting hole provided in the fender apron 17. The front end of the open-to-atmosphere end member 15 faces the space 19 surrounded by the fender apron 17 and the fender liner 18 so that water and the like are not sucked into the open-to-atmosphere port 11 of the VSV 9 together with the suctioned air. Have been. In FIG. 2, reference numeral 20 denotes a hood hood that covers the upper surface of the engine room 16.

The open-to-atmosphere member 15 is, as shown in FIG. 1, composed of a cylindrical body 21 having an air intake passage 22 formed at an axial center position, and a VSV hose 14 connected to a base end thereof. In the middle part of the cylindrical body 21, a plate-shaped receiving portion 24 abutting around the mounting hole 23 formed in the fender apron 17, and the mounting hole 23 passing through the mounting hole 23 after being elastically deformed.
And an elastic engaging portion 25 that engages with the opening edge of the opening. The elastic engagement portion 25 is formed from a plurality of circumferentially extending elastic pieces that extend obliquely outward toward the base end side of the cylindrical body 21 so as to be elastically deformed and penetrate the mounting hole 23. The engaging projection 26 engages with the opening edge of the mounting hole 23 at the front end thereof.
Is formed. At the tip of the elastic engaging portion 25,
A packing 27 interposed between the receiving portion 24 and the fender apron 17 is provided integrally. A flange 28 for draining water is provided on the outer periphery at a position at an appropriate distance from the tip of the cylindrical body 21.

In the above configuration, the open-to-atmosphere end member 15
When mounting the fender apron 17, the distal end of the cylindrical body 21 is inserted into the mounting hole 23 formed in the fender apron 17 from within the engine room 16 until the receiving portion 24 is pressed against the fender apron 17 via the packing 27. Press firmly. Then, the elastic engaging portion 25 passes through the mounting hole 23 while being elastically deformed. When the engaging projection 26 passes through the mounting hole 23, the elastic engaging portion 25 is elastically restored, and the receiving portion 24 and the elastic engaging portion The fender apron 17 is sandwiched between 25 and the open-to-atmosphere end member 15 is attached.

In this mounted state, the packing 27 is interposed between the fender apron 17 and the receiving portion 24 in a compressed state on the engine room 16 side, so that the water that has entered the engine room 16 is removed by the fender apron 17.
Does not flow out through the mounting hole 23 into the space 19 surrounded by the fender apron 17 and the fender liner 18. Further, even if water flows out through the mounting hole 23 for some reason and water flows along the surface of the elastic engaging portion 25, a flange 28 for draining is provided at a position at an appropriate distance from the tip of the cylindrical body 21. So the cylinder 2
Before reaching the front end, the flange 28 prevents water from flowing further to the front end side. Thus, even if the atmosphere opening port 11 of the VSV 9 is opened and the atmosphere is sucked from the atmosphere suction passage 22 of the atmosphere opening end member 15 via the VSV hose 14, water is not sucked together with the atmosphere.

A space 19 surrounded by the fender apron 17 and the fender liner 18 has a fender apron 1
Although it is closed to the inside of the interior of the car 7, water may enter this space in some cases. Even if water does not flow out of the engine room 16 due to the packing 27, the water flows along the fender apron 17. Water may flow. Also in this case, the provision of the flange 28 of the cylindrical body 21 can prevent water from being sucked in with the atmosphere in the same manner as described above.

[0015]

According to the present invention, according to the present invention, the VSV can be easily mounted simply by inserting the VSV into the mounting hole of the mounting plate from the distal end of the cylindrical body. Since a flange for draining water is provided at an appropriate distance from the flange, even if water flowing down the mounting plate may flow from the elastic engagement portion toward the tip of the cylindrical body, VSV can be reliably prevented from reaching the tip of the cylinder.
When the atmosphere opening port is opened and the atmosphere is sucked from the atmosphere suction passage, water can be reliably prevented from being sucked together with the atmosphere.

[Brief description of the drawings]

FIG. 1 is a half sectional front view showing a lower half of a VSV open end member according to an embodiment of the present invention;

FIG. 2 is a sectional view showing an arrangement state of an open-to-atmosphere member of the embodiment.

FIG. 3 shows a four-wheel drive and a two-wheel drive using a VSV in the embodiment.
It is a schematic structure figure of a switching device of a wheel drive.

FIG. 4 is a half cross-sectional front view showing a lower half of a VSV open-to-atmosphere member in a conventional example.

[Explanation of symbols]

 9 VSV (Vacuum Switching Valve) 11 Atmosphere Opening Port 14 VSV Hose 15 Atmospheric Opening End Member 17 Fender Apron 21 Cylindrical Body 22 Atmospheric Intake Passage 23 Mounting Hole 24 Receiving Portion 25 Elastic Engaging Portion 28 Flange

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylinder having an atmosphere suction passage and a base end of which is connected to an atmosphere opening port of a vacuum switching valve via a hose, and formed on a mounting plate at an intermediate portion of the cylinder. A receiving portion that contacts the periphery of the mounting hole and an elastic engaging portion that elastically deforms through the mounting hole and engages with the mounting plate are provided. An air opening end member of a vacuum switching valve, wherein a flange is provided.