JPH0238021Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a known thermostat that is interposed between an engine, a radiator, and a cooling water pump to control the flow rate of engine cooling water.

As is well known in the art, this type of thermostat mounting structure connects its mounting flange to a coolant inlet communicating with an engine coolant outlet and two coolant outlets communicating with a coolant pump and a radiator, respectively. The housing is usually divided into two parts, and is sandwiched between the mating surfaces of the housing with an appropriate gasket interposed therebetween. The gasket interposed between the mounting flange and the housing has a sealing function that prevents the pressurized cooling water inside the housing from leaking to the outside, and does not impair its function as a flow rate regulating valve for the thermostat. It must also have a clamping function to hold the thermostat in the correct position relative to the housing. However, with normal gaskets, even if there are no problems with both the sealing and clamping functions at the time of installation, the sealing function deteriorates quickly over time, so it is necessary to retighten the gasket periodically. They often require replacement within a short period of time.

The present invention was devised in view of the above, and in a case where the mounting flange of a thermostat is attached to a housing divided into upper and lower parts via a gasket, a mounting flange of a thermostat is attached to the inner circumferential edge of the lower housing adjacent to the upper housing. A first recess is provided and the mounting flange is inserted into the first recess.
A second recess that communicates with the recess and is shallower than the recess is provided and the gasket is inserted into the recess, and the gasket is configured to
A clamp part whose one side is pressed into contact with the mounting flange and whose other side is brought into pressure contact with the mating surface of the upper housing facing the first recess;
The thermostat mounting structure is characterized by comprising an O-ring portion interposed between the mating surfaces of the upper and lower housings facing each other in the recessed portion. According to the present invention, the O-ring part, which performs only the sealing function and exhibits an excellent sealing function, and the clamp part, which fixes the thermostat mounting flange relative to the housing, are separated. Since it is integrally molded as a single component, the two functions described above can be ensured for a long period of time, and the structure is simple and inexpensive.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the figure, the reference numeral 10 indicates a bottom bypass type thermostat which is known per se, and 12
is its mounting flange. 14 is a housing containing the thermostat 10, and includes a cooling water inlet 16 communicating with a cooling water outlet of an engine (not shown) and two cooling water outlets 18, 20.
One of these outlets connects to a cooling water pump (not shown).
The other end is connected to a radiator. The housing 14 is constructed by fastening an upper housing and a lower housing 14a and 14b, which are divided into upper and lower parts, together at mating surfaces 24a and 24b with bolts 22, and the present invention is provided between the mating surfaces 24a and 24b. A gasket 26 related to this is interposed.

As clearly shown in FIG. 2, a first recess 15a for receiving the mounting flange 12 of the thermostat is formed at the inner circumferential edge of the upper end surface of the lower housing 14b. A second recess 15b that communicates with the first recess and is shallower than the first recess is provided outside the recess 15a. on the other hand,
The gasket 26 is a clamp portion 2 for fixing the mounting flange 12 of the thermostat 10.
8 and an O-ring portion 30 that seals pressurized engine coolant within the housing 14. When the bolt 22 is tightened, the clamp portion 28 has one side pressed against the mounting flange 12 of the thermostat and the other side pressed against the mating surface 24a of the upper housing, thereby holding the thermostat 10 in place. functions to hold
Further, the O-ring portion 30 elastically contacts the mating surface 24a and the upper surface of the second recess 15b to provide a seal to prevent the cooling water in the housing 14 from leaking to the outside, similar to a normal O-ring portion. It is something to do. Therefore, when installing the thermostat 10, the mounting flange 12 of the thermostat 10 is first supported on the lower housing 14b, and then the upper housing 14a is placed with the gasket 26 preferably formed vertically symmetrically placed thereon. Then, finally, tighten the bolt 22. According to this structure, the gasket 26 is formed by integrally molding the clamp part 28 and the O-ring part 30, so the structure is simple and inexpensive, and the assembly work is simple and does not require retightening after assembly. There are advantages such as no need for

As mentioned above, in the thermostat mounting structure according to the present invention, in which the mounting flange of the thermostat is mounted to a housing divided into upper and lower parts via a gasket, the inner circumferential end of the lower housing adjacent to the upper housing is A first recess is provided in the edge, into which the mounting flange is inserted; a second recess, which communicates with the first recess and is shallower than the recess, is provided outside the first recess, into which the gasket is inserted; includes a clamp part whose one side is pressed against the mounting flange and whose other side is pressed into contact with the mating surface of the upper housing facing the first recess, and the clamp part which is integrally molded continuously on the outside of the clamp part. It is characterized by an O-ring part interposed between the mating surfaces of the upper and lower housings that face each other in two recessed parts, and has a simple and inexpensive structure that does not cause leakage of cooling water. Furthermore, it is extremely advantageous because it is possible to provide a device of this type that is easy to assemble, maintain, and maintain.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged sectional view of the main part of FIG. 1. 10...Thermostat, 12...Mounting flange, 14...Housing, 24a, 24b...Mating surface, 26...Gasket.

Claims (1)

[Scope of utility model registration request] A mounting flange of a thermostat is mounted to a housing divided into an upper and a lower part via a gasket, wherein a first recess is provided at the inner circumferential edge of the lower housing adjacent to the upper housing and the mounting flange is inserted; A second recess that communicates with the first recess and is shallower than the first recess is provided outside the first recess, into which the gasket is inserted, and one side of the gasket is pressed against the mounting flange and the other side is pressed against the mounting flange. a clamp portion that is brought into pressure contact with a mating surface of the upper housing that faces the first recess;
A thermostat mounting comprising an O-ring part that is integrally molded continuously on the outside of the clamp part and interposed between the mating surfaces of the upper and lower housings facing each other in the second recess. structure.