JP2592230Y2 - Plate valve support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped valve and, more particularly, to a plate-shaped valve supporting device provided in an outside air intake duct of an engine.

[0002]

2. Description of the Related Art In a vehicle engine, as shown in FIG. 4, a vacuum motor M is mounted on an outside air intake duct D of an air cleaner A connected to an intake pipe K of an engine E, and its upper chamber is connected to a hose member H and an air cleaner. Is connected to an intake pipe K via a temperature sensor S provided in the outside air intake duct D, a warm air guide duct D 'reaching the vicinity of the exhaust pipe L is connected in the middle of the outside air intake duct D, and a plate-shaped valve is provided in the outside air intake duct D. V is rotatably arranged and connected to the operating rod 4 of the vacuum motor M. In cold weather, the negative pressure in the intake pipe K is introduced into the upper chamber of the vacuum motor M via the temperature sensor S, and the valve V is opened. In order to take in the warm air near the exhaust pipe L through the warm air guide duct D 'together with the outside air, or to provide two outside air intake ducts D in the air cleaner A as shown in FIG. At the same time, a vacuum motor M communicating with the intake pipe K is attached to the engine, and a plate-shaped valve V is disposed inside the valve. At low load and low speed rotation, the valve V is rotated by the vacuum motor M to close one duct D and to take in outside air only from the other duct D.

The buck motor M is as shown in FIG. 6 and comprises an upper case 1 and a lower case 2 made of a synthetic resin dish, and the inside is vertically moved between the peripheral flanges of the upper and lower cases 1 and 2. The peripheral edge of the diaphragm 3 is sandwiched, and the upper case 1 has a pipe 1 for introducing a negative pressure.
a, a coil spring 5 for horizontally holding the diaphragm 3 is provided therein, and a valve operating rod 4 is suspended from the center of the diaphragm 3 via a retainer metal fitting. 2 has a leg piece 2a on one side and an elongated piece 2b on the other side of the bottom wall,
A window hole D ₅ provided by extending the extension piece 2b on the duct D
The bolt 6 is screwed into a nut member 7 in which the lower end of the leg piece 2a is embedded in the wall surface of the duct D, and is fixed.

On the other hand, in the duct D are made also of synthetic resin for outside air intake, half duct on the groove-shaped D ₁ and a lower half duct D ₂
Made, it is welded butt flange D ₃ provided around end of the upper half duct D ₁ and the lower half duct D _2,
Further, a plate-shaped valve V (which may open and close the warm air guide duct may be provided with a protruding body as shown by a dotted line in FIG. 6) provided in the duct has pin shafts on both sides of the center as shown in FIG. V
₁ which are the upper and lower ducts D ₁ , D ₂
Lugs V ₂ provided on the one end portion of the valve V while being halfway rotatable bearing portion D ₄ which is formed on the support flanges D ₃ is operating rod 4 penetrating the upper half duct D ₁ of the Hanged on the lower hook.

[0005]

In the above-described conventional valve support device, a pin shaft is provided on both sides of the center of the plate-shaped valve, and the pin shaft is formed in the middle of the butting flange of the upper half duct and the lower half duct. The upper half duct and lower half duct are axially displaced because the upper half duct and lower half duct are welded at the abutting part of the upper half duct and lower half duct. Bend at the position of
Further, the movement of the pin shaft, that is, the plate-shaped valve is hindered by the welding burrs, which may cause a malfunction in the operation.

Therefore, the present invention corrects the fit between the pin shaft and the bearing portion and eliminates the penetration of welding burrs.
An object of the present invention is to facilitate the operation of a plate-shaped valve.

[0007]

SUMMARY OF THE INVENTION With the above object, the present invention is provided in a duct for taking in outside air of an engine,
As a support device for a plate-shaped valve that is rotated by a vacuum motor provided on a duct, the duct is formed by integrally molding the upper and lower portions with a synthetic resin, and a pin that protrudes inward at a predetermined position on the inner surface of both side walls. A shaft is provided integrally, and a slit opening for fitting a pin shaft and a cylindrical bearing portion having this as an inlet are provided at both ends of a center shaft portion of the plate-shaped valve. It is characterized in that it is rotatably fitted to the.

[0008]

1 and 2 show an embodiment of the present invention. A buck motor M is composed of a synthetic resin dish-shaped upper case 1 and a lower case 2 as described above.
A peripheral edge of a diaphragm (3 in FIG. 3) that partitions the inside up and down is sandwiched between peripheral flanges of the lower cases 1 and 2, and an upper case 1 is provided with a pipe 1a for introducing a negative pressure and an inner portion. Is provided with a coil spring (5 in FIG. 3) for holding the diaphragm horizontally. An operating rod 4 of a valve is suspended from the center of the diaphragm 3 via a retainer fitting. the other side portion of the bottom wall provided with a leg 2a on the side provided with an extension piece 2b, window hole D ₅ of the extension piece 2b is provided on the duct D
On the other hand, the lower end flange of the leg piece 2a is screwed and fixed to a nut member 7 embedded in the wall of the duct D.

The duct D for taking in outside air made of synthetic resin according to the present invention is integral without being divided into upper and lower parts, and the pin shaft 11 is provided at a required height at the center height of the inner surface of both side walls. A rod-shaped shaft having a required diameter in a direction perpendicular to the axis of the duct is provided at a central portion of the plate-shaped valve V disposed in the duct D at right angles to the axis. A slit opening 12b having a length substantially equal to the length of the pin shaft 11 and having a width slightly smaller than the diameter thereof and a cylindrical bearing portion 12a having the slit as an inlet are formed at both ends thereof. ing.

[0010] The plate-shaped valve V is connected to the pin shafts 11 on both sides of the inner surface of the duct D from the respective slit openings 12b through the bearing portion 1.
2a, the lug 13 is rotatably mounted on the duct D as shown in FIG. 2, and the lug 13 provided on one end of the valve V is hooked on the lower end hook of the operating rod 4 of the buck motor M. .

Therefore, when a negative pressure is introduced into the upper chamber of the vacuum motor M, the operating rod 4 is raised, and the valve V rotates counterclockwise in FIG. Alternatively, the warm air guide duct connected to the duct D is opened to appropriately take in warm air near the exhaust pipe.

In the above-described example, the bucky motor M is provided with the leg pieces 2a and screwed to the duct D. However, the bucky motor M is engaged with the lower surface of the lower case 2 of the bucky motor M without using screw means. Protrusions may be provided, which may be fitted and mounted in an opening provided in the duct D in a one-touch manner, and the lower case 2 of the buck motor M may be integrally formed with the duct D as shown in FIG. You may do so.

[0013]

As described above, in the present invention, as a supporting device for a plate-shaped valve disposed in a duct for taking in outside air of an engine and rotated by a vacuum motor on the duct, the duct is made up and down by a synthetic resin. In addition, a pin shaft protruding inward is integrally provided at a predetermined position on the inner surface of both side walls, and a slit opening for fitting the pin shaft is formed at both ends of the central shaft portion of the plate-like valve, and an inlet is formed through the slit opening. Since cylindrical bearings are provided, and these bearings are rotatably fitted to the pin shafts on the inner surfaces of both side walls of the duct,
Since the position of the pin shaft is at a predetermined position, there is no displacement of the valve bearing attached to it,
Further, since it is not necessary to weld the duct in a divided structure for mounting the pin shaft, there is no welding burr between the pin shaft and the bearing portion of the valve, so that the operation of the valve is smooth, and Since the mounting of the valve on the pin shaft is only pushed in, the assembly is easy and the work can be simplified.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing an assembled state of the present invention.

FIG. 3 is a cross-sectional view of an example in which a lower case of a vacuum motor is integrally formed with a duct.

FIG. 4 is a side view showing an example of a use state of the bakyumu motor.

FIG. 5 is a side view showing another example of a use state.

FIG. 6 is a cross-sectional view showing the relationship between the arrangement of a conventional plate-shaped valve and a buck motor.

FIG. 7 is a partially cut front view along the line XX of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 2a Leg piece 3 Diaphragm 4 Operating rod 11 Pin shaft 12 Shaft part 12a Bearing part 12b Slit opening D Duct M Backum motor V Valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A supporting device for a plate-shaped valve which is disposed in a duct for taking in outside air of an engine and is rotated by a vacuum motor provided on the duct. A pin shaft projecting inward is integrally provided at a predetermined position on the inner surface of both side walls, and a slit opening for fitting the pin shaft and a cylinder having the same as an inlet at both ends of the center shaft portion of the plate-shaped valve. A plate-shaped valve support device comprising: a plurality of bearings; and the bearings are rotatably fitted to pin shafts on inner surfaces of both side walls of the duct.