JPH0710666U - Temperature sensing valve - Google Patents

Abstract

(57) [Summary] [Purpose] A valve body pivotally supported by a holding plate of a temperature sensing valve is rotated by a coiled temperature sensing body so that opening and closing can be performed without trouble. [Structure] A cylindrical portion 2b in which a shaft portion 5 is erected is provided in the center of a holding plate 2c, an inflow port 2c is provided around the cylindrical portion 2b, and a cylindrical portion 6 in which a through hole 7 and a mounting wall 6a are formed outside thereof is provided. It is erected and forms the holding body 2. A valve body 3 having a cup-like shape and an insertion hole 9a formed in the center, a fitting portion 9 provided upright, and a valve opening 8 opened in a peripheral wall is rotatably supported by a shaft portion 5. The coil-shaped temperature sensing body 4 is supported by the mounting wall 6a and the fitting portion 9, and is fitted and attached to the fitting portion 9. The valve body 3 rotates due to the temperature rise,
The through hole 7 and the valve opening 8 are made to coincide with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a temperature sensing valve which is disposed in a feed passage of an internal combustion engine, for example, and opens when the liquid temperature becomes higher than a specified temperature to let a high temperature liquid escape to a bypass passage.

[0002]

[Prior art]

 Conventionally, the one shown in FIG. 2 has been widely used as this type of temperature sensing valve. That is, the temperature sensing valve 11 is disposed, for example, in the storage portion 22 provided at the branch point of the bypass flow passage 21 in the feed flow passage 20 connected to the main gallery of the engine. When the temperature of the liquid flowing through the passage 20 rises, the piston body 15 slides and displaces due to the operation of the temperature sensing body 14, and the end portion of the valve body 13 attached to the piston body 15 separates from the holding plate 12 and opens to open the high temperature. Operates to flow liquid to bypass 21. A cooler (not shown) is arranged in the bypass passage 21.

[0003]

[Problems to be solved by the device]

 In this conventional temperature sensing valve, the holding plate and the valve body are largely separated from each other when the valve is opened so as not to obstruct the flow of fluid. For this reason, when the piston body slides a lot, it may tilt due to the pressure of the fluid, and the movement of the piston body may lack smoothness, or if the gap between the valve body and the storage part is narrow, the valve body may move. It cannot contact the inner wall of the storage part and cannot slide, and the original function of the temperature sensing valve cannot be maintained.

[0004]

[Means for Solving the Problems]

 According to the present invention, a columnar portion is provided at the center of one surface of a flat plate-like holding plate, a cylindrical shaft portion is provided upright at the end of the columnar portion, and an inflow port is formed around the cylindrical portion of the holding plate. Further, on the outside of the inflow port on one surface of the holding plate, a cylindrical body having a cylindrical shape and having a through hole and a mounting wall protruding inward is provided upright, and the cup is attached to the holding body. A valve body having a cylindrical fitting portion in which a circumferential wall is inscribed in the cylindrical portion of the holding body, a circumferential wall has a valve opening, and a central insertion hole is formed in the center inner surface of the bottom wall. However, the shaft of the holder is inserted and rotatably supported, and a wire made of a temperature-sensitive deformable material such as bimetal or shape memory alloy is wound around the fitting portion of the valve body to form a coil. The formed temperature sensor is inserted into the fitting portion, one end is fixed to the fitting portion of the valve body, and the other end is fixed to the mounting wall of the holding body. In which the valve port of the passing openings and the valve element of the holding member in the rotation of the valve body with increasing temperature of the liquid was no such match.

[0005]

[Action]

 The fluid flows into the cup-shaped valve body from the inlet of the holding plate. When the temperature of the fluid rises, the temperature sensing element deforms and the valve body rotates around the shaft of the holding body, and the valve opening of the valve body and the opening of the holding body coincide with each other. Fluid passes through the valve port.

[0006]

【Example】

 FIG. 1 shows an embodiment of the present invention. The temperature sensing valve 1 is disposed in a cup-shaped storage portion 22 provided at a branch point with a bypass flow passage 21 in a flow passage 20 for supplying engine lubricating oil, and the holding body 2, the valve body 3 and And a temperature sensor 4.

The holding body 2 includes a holding plate 2 a and a cylindrical portion 2 b in which a shaft portion 5 is integrally formed, and a cylindrical portion 6. The holding plate 2a is a disc-shaped member, and a thick columnar portion 2b is erected in the center of one surface of the holding plate 2a. The cylindrical portion 6 is provided outside the inflow port 2c so as to be coaxial with the cylindrical portion 2b. A columnar shaft portion 5 which is thinner than the diameter of the columnar portion 2b is erected at the center of the tip surface of the columnar portion 2b, and an annular groove is formed at the tip of the shaft portion 5. A mounting wall 6a is formed on the inner peripheral wall of the cylindrical portion 6 so as to project inward and has a rectangular shape having the same length as the cylindrical portion 6. A rectangular window-shaped opening 7 is formed at a position equally dividing the circumference of the peripheral wall. There are multiple openings (three in the figure).

The valve body 3 has a cup-like shape having an inner diameter slightly larger than the outer diameter of the cylindrical portion 6 of the holding body 2, and covers the through hole 7 of the holding body 2 at a position equally dividing the circumference of the peripheral wall. A plurality of rectangular window-shaped valve openings 8 (three places in the figure) are opened, leaving a portion, and a cylindrical stepped fitting portion 9 is formed with an insertion hole 9a centered on the inner surface of the bottom wall. Is erected. The valve body 3 has the inner surface of the peripheral wall inscribed in the cylindrical portion 6 of the holding body 2, the insertion hole 9a of the fitting portion 9 is inserted into the shaft portion 5 of the holding body 2, and is stopped in the groove of the shaft portion 5. The wheel 10 is fitted and rotatably attached.

The temperature sensing body 4 is formed by winding a wire rod made of a shape memory alloy concentrically into a coil shape, and is shaped so as to be deformed toward the unwinding side at a high temperature. It is inserted into the fitting portion 9. One end of the temperature sensing body 4 is fixed to the fitting portion 9, and the other end is fixedly attached to the mounting wall 6a of the holding body 7.

Further, a coil spring 4a whose winding direction is reversed is fixed to the fitting portion 9 at the valve fitting portion 9, and the other end of the coil spring 4a is fixedly attached to the mounting wall 6a. It should be noted that instead of the coil spring, a temperature sensor whose shape is memorized so as to be deformed to the winding tightening side at low temperature may be incorporated.

When the temperature sensing valve 1 is cold, as shown in FIG. 3, the valve opening 8 of the valve body 3 is closed and closed by the peripheral wall of the cylindrical portion 6 of the holding body 2, and the temperature sensing body 4 is closed by liquid. When heated, it deforms in the unwinding direction, and the valve body 3 rotates around the shaft portion 5 accordingly, and as shown in FIG. 4, the valve opening 8 of the valve body 3 and the through hole 7 of the holding body 2 become uniform. I will open the valve.

In addition to the above embodiment, the temperature sensor may be formed by winding a bimetal in a coil shape. In this case, the high temperature deformation type and the low temperature deformation type are used as a set, and the coil temperature sensor is also used. It is also possible to install only one.

[0013]

[Effect of device]

 As described above, according to the present invention, the cup-shaped valve body, in which the fitting portion having the insertion hole formed therein is erected on the bottom wall and the valve opening is opened in the peripheral wall, includes the cylindrical portion having the passage opening and the shaft portion. Is rotatably supported by a holding plate that is erected on the holding plate, and a temperature sensing member having a temperature sensing material formed in a coil shape is inserted into the fitting portion of the valve body. When the body is rotated, the through hole of the holding body and the valve opening of the valve body are aligned with each other. Therefore, the valve body should rotate around the shaft portion with the inner surface of the insertion hole in contact with the shaft portion. In addition, a large flow path can be obtained simply by rotating the valve element so that the valve opening of the valve element and the opening of the holding element are aligned, and the valve element can be tilted without sliding in the axial direction. Absent. Therefore, the temperature sensing valve maintains its original function.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a conventional temperature sensing valve.

FIG. 3 is a transverse cross-sectional view showing a valve closed state showing an operating state of the embodiment.

FIG. 4 is a transverse cross-sectional view showing an operating state of the embodiment in a valve open state.

[Explanation of symbols]

 1 Temperature Sensing Valve 2 Holding Body 3 Valve Body 4 Temperature Sensing Body 5 Shaft Part 6 Cylindrical Part 7 Through Port 8 Valve Port 9 Fitting Part

Claims (1)

[Scope of utility model registration request] 1. A columnar portion is provided at the center of one surface of the holding plate, a cylindrical shaft portion is provided upright at the end of the columnar portion, and an inflow port is formed around the columnar portion of the holding plate. On the outside of the inlet on one surface, a cylindrical portion having a cylindrical shape and having a through hole and having a mounting wall protruding inward is provided upright, a cup-shaped peripheral wall is held by the holding body. A valve body, which is inscribed in the cylindrical portion of the body and has a valve opening in the peripheral wall, and in which a cylindrical fitting portion having a center insertion hole formed in the center inner surface of the bottom wall is provided upright, is a shaft of the holding body. Part is inserted into the insertion hole and is rotatably supported, and a coil-shaped temperature sensing body made of a temperature-sensitive deformable material is inserted into the fitting part of the valve body, and one end of the fitting part is fitted with the valve body. The other end is fixed to the mounting wall of the holding body and the valve body rotates due to the temperature rise so that the through hole of the holding body and the valve opening of the valve body coincide with each other. A temperature-sensing valve designed to do so.