KR101296453B1 - Thermostat for vehicle - Google Patents

Abstract

The present invention relates to a vehicle thermostat installed in a cooling water flow path of an engine through which cooling water flows, wherein one side of the valve housing is connected to one side of the cooling water flow path and a hollow is formed to communicate the cooling water; Another valve housing having one end coupled to the other side of the valve housing to communicate cooling water; A coupler integrally coupling the one valve housing and the other valve housing; It is formed to shield the rod fixed to the one valve housing and the hollow of the other valve housing has a cylinder that is connected telescopically to the rod, the cylinder is reciprocated by the telescopic operation while opening and closing the hollow of the other valve housing On-off valve; Driving means for providing a driving force to the on / off valve to telescopic the cylinder of the on / off valve; And a guider for movably supporting the cylinder of the on / off valve reciprocated by the driving force of the driving means while allowing the coolant to flow through the hollow of the one side valve housing and the other side valve housing. According to the present invention, since the cylinder constituting the on-off valve opens and closes the hollow of the other valve housing while reciprocating by the driving means, the coolant flow path can be opened and closed without a separate piston, and the cylinder can move while the coolant communicates by the guider. It is possible to control the coolant while moving the cylinder stably without forming the valve seat separately as it is supported.

Description

Automotive Thermostats {THERMOSTAT FOR VEHICLE}

The present invention relates to a vehicle thermostat, and more particularly, to a vehicle thermostat installed in the cooling water flow path of the engine through which the cooling water flows, opening and closing the cooling water flow path while operating according to the temperature of the cooling water.

In general, a thermostat is installed in a cooling water flow path of an engine, and operates according to the temperature of the cooling water to open and close the cooling water flow path to communicate the cooling water with a radiator or a heater.

The thermostat of the prior art is a thermostat disclosed in Japanese Patent Laid-Open No. 07127533 as shown in FIG.

This conventional thermostat is one side pipe 11 by the spring 14 in the inner side of the pair of pipes 10, 11 installed in communication with the cooling water flow path of the engine as shown in Figure 1 (a) Piston rod (15) equipped with a flange installed in the state of opening the inlet of the opening), as shown in (b) of Figure 1, while being pressed by the second spring (16) and one side with the piston rod (15) The rod 3 of the main valve 15 is pressurized by the rubber valve member 17 which closes the inlet of the pipe 11 and the wax 6 thermally expanded by high temperature cooling water, It consists of a thermal barrel (7) for closing the inlet.

Such a conventional thermostat is one side by the valve member 17 opened by the elastic force of the spring 14, when the coolant flowing into the one side pipe 11 is a low temperature, as shown in Figure 1 (a) The cooling water is communicated to the other pipe 10 by opening the inlet of the pipe 11. And when the coolant flowing into the one side pipe 11 is a high temperature, as shown in (b) of FIG. 1 (b) the piston rod 15 is pressurized as the wax contained in the thermal barrel 7 is thermally expanded while the valve member ( 17) rises to close the inlet of the one-side pipe (11).

By the way, the conventional thermostat is inside the valve member 17 because the rubber constituting the valve member 17 for opening and closing the one side pipe 11 is easily deformed by the force in close contact with the valve seat 18. It is difficult to manufacture because it is composed of a rubber member in which metal is inserted, and furthermore, a flange for fixing the valve member 17 must be provided on the piston rod 15 and a second spring 16 must be provided. There is a problem that is complicated and takes a lot of production cost.

In addition, the conventional thermostat is a coupling process because one side pipe 11 and the other side pipe 10 is fixed by a curling process as shown in Figure 1 and the other side pipe 10 is fixed by a screw coupling with the counterpart This is cumbersome, there is a problem that can not be separated when combined by the curling process. In addition, the conventional thermostat has a problem that the material cost is high and the weight of the engine is increased at the same time as the one side pipe 11 and the other side pipe 10 are made of a metallic material due to the characteristics of the coupling method.

JP 07127533 A

The present invention was created in order to solve the problems of the prior art as described above, it is possible to enclose the cooling water flow path through the part of the telescopic member according to the temperature of the cooling water without the valve member, one valve housing and the other valve housing The purpose is to provide a vehicle thermostat that can be detachably coupled.

Vehicle thermostat of the present invention for achieving the above object, in the vehicle thermostat installed in the cooling water flow path of the engine through which the cooling water flows, one side is connected to the cooling water flow path, the hollow is formed One side valve housing for communicating the cooling water to the cooling water flow path through the hollow; An other end coupled to the other end of the one side valve housing, the other end coupled to another cooling water flow passage connected to the cooling water flow passage, and a hollow valve formed to communicate the coolant through the hollow; A coupler for integrally coupling the one valve housing and the other valve housing by constraining the other valve housing to the one valve housing; It is formed to shield the rod fixed to the one valve housing and the hollow of the other valve housing has a cylinder that is connected telescopically to the rod, the cylinder is reciprocated by the telescopic operation while opening and closing the hollow of the other valve housing On-off valve; Driving means for providing a driving force to the on / off valve to telescopic the cylinder of the on / off valve; And a guider for movably supporting the cylinder of the on / off valve reciprocated by the driving force of the driving means while allowing the coolant to flow through the hollow of the one side valve housing and the other side valve housing.

According to the thermostat for a vehicle according to the present invention as described above, since the cylinder constituting the on-off valve opens and closes the hollow of the other valve housing while reciprocating by the driving means, the cooling water flow path can be made without the rubber valve member or the member added to the rod. As the cylinder is movably supported while the coolant is communicated by the guider, the cylinder can be stably moved while intermittently cooling the coolant without forming the valve seat separately.

In addition, as one valve housing and the other valve housing are integrally coupled while being restrained by the coupler, assembly and disassembly may be convenient, and thus, manufacturability may be improved.

1 is a longitudinal sectional view showing a thermostat according to the prior art.
Figure 2 is a perspective view of a vehicle thermostat according to the present invention.
Figure 3 is a longitudinal sectional view showing a vehicle thermostat according to the present invention.
Figure 4 is a cutaway perspective view showing the other side valve housing of the present invention.
Figure 5 is a longitudinal sectional view showing an operating state of the vehicle thermostat according to the present invention.
Figure 6 is a longitudinal sectional view showing another embodiment of the present invention.
7 is a perspective view showing another embodiment of one valve housing and the other valve housing shown in FIG.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

As shown in FIGS. 2 and 3, the thermostat for a vehicle according to the present invention includes one valve housing 10, the other valve housing 20, a coupler 30, an on / off valve 40, a driving means 50, and a guider. It can comprise including 60.

One side of the valve housing 10 is connected to the cooling water flow path 1 of the engine as shown in Figure 2, as shown in Figure 3 is formed as a hollow body to communicate the coolant through the hollow (11).

The other side valve housing 20 is formed as a hollow body as shown in Figure 3 is coupled to the other end of the one side of the valve housing 10 in an overlapping state, the other end as shown in Figure 2 another cooling water flow path ( 1 ') is used to communicate the coolant through the hollow 21.

On the other hand, the other valve housing 20 may be coupled to overlap with the one side valve housing 10 is inserted into the inner side as shown in FIG.

Here, the one side valve housing 10 and the other side valve housing 20 communicates the coolant in one direction, for example, is installed in the coolant flow paths (1) (1 ') connected to the heater of the engine to communicate the coolant with the heater. Can be.

Meanwhile, as shown in FIG. 6, at least one bypass passage 15 for bypassing the coolant to a radiator or an engine, as illustrated in FIG. 6, may be provided in communication with the hollow 11. .

In this case, the one side valve housing 10 may be connected to, for example, a radiator and an engine to branch the coolant by communicating the coolant in two directions of the other side valve housing 20 and the bypass passage 15. Of course, the one side valve housing 10 may be a plurality of bypass passages (15) provided to communicate the coolant in multiple directions.

The coupler 30 is a component that restrains the other valve housing 20 to the one valve housing 10 to integrally couple the one valve housing 10 and the other valve housing 20, for example, as illustrated in FIG. 3. As described above, the support jaw 31 and the support 33 may be configured to be included.

The support jaw 31 is provided inside the one side valve housing 10 or the other side valve housing 20, for example, a flange or the like is formed in the other side of the valve housing 20 as shown in FIG. It may be configured as a step and may be disposed inside the one side valve housing (10).

On the other hand, the support jaw 31 may be formed in the same body in the one side valve housing 20, for example, as shown in Figure 7 may be disposed inside the other side valve housing (10).

The support 33 is a member for supporting the support jaw 31 while being caught by the support jaw 31 through one side of the valve housing 10 or the other side of the valve housing 20, for example, as shown in FIG. 2. Is formed in the fork 33a is provided on both sides, the fork (33a) on both sides as shown in Figure 3 while passing through one side of the valve housing 10 is caught on the support jaw 31 of the other valve housing 20 Can be configured as a clip.

Such a support 33 supports the support jaw 31 while penetrating the other valve housing 20 when the support jaw 31 is provided in one valve housing 10 as shown in FIG. 7.

Here, the support 33 may be composed of at least one pin not shown, but it is preferable that the support 33 is composed of the above-described clip to improve assembly.

That is, the coupler 30 integrally couples the one side valve housing 10 and the other side valve housing 20 through the engagement of the support jaw 31 and the support stand 33.

Therefore, the one side valve housing 10 and the other side valve housing 20 can be detachably coupled by the coupler 30, thereby improving the assembly is easy to manufacture.

On the other hand, the coupler 30 may be configured as a hook 35 formed on one side of the valve housing 10 and hooked to the support jaw 31 of the other side valve housing 20, for example, as shown in an enlarged view on the right side of FIG. 3. It may be. The hook 35 may be configured to be fixed to the other side of the valve housing 20 is fixed to the one side valve housing 10, unlike shown.

Alternatively, the coupler 30 described above may be configured as a screw 37 that is fastened to the other valve housing 20 by passing through the valve housing 10 on one side as shown in an enlarged view on the left side of FIG. 3. Unlike the illustrated, it is composed of a male screw formed in the other side valve housing 20 and a female screw formed in one side valve housing 10 to integrally combine the one side and the other valve housing 10, 20 by screwing. Not only may it be configured, but it can also be comprised by the fusion means which fuse | melts the joining surface of one side and the other side valve housing 10 and 20 by fusion | melting with ultrasonic waves. Since such screw coupling and fusion are easily understood by those skilled in the art, a detailed description thereof will be omitted.

Here, one side and the other side of the valve housing 10, 20 may be coupled by a conventional method other than the above-described coupler 30, it is not limited to the above-described configuration.

The on-off valve 40 is a component for opening and closing the hollow 21 of the other side valve housing 20 is built in one side and the other side valve housing 10, 20, for example, one side valve housing as shown in FIG. The cylinder 41 which opens and closes the hollow 21 of the other valve housing 20 while being reciprocated by telescopic operation by being telescopically connected to the rod 41 fixed to the rod 41 and the rod 41 can be configured. have.

As shown in FIG. 3, the cylinder 43 shields the other valve housing 20 as the outer circumferential surface slides while being fitted to the inner circumferential surface of the other valve housing 20. Accordingly, the cylinder 43 may open and close the other valve housing 20 to interrupt the communication of the coolant even without a separate valve member such as rubber packing.

The driving means 50 is a means for providing a driving force to the on-off valve 40 to telescopic the cylinder 43 of the on-off valve 40, for example, as shown in FIG. It can be comprised by the conventional wax element in which the wax 51 which telescopically expands and contracts the cylinder 43 from the rod 41 while expanding according to water temperature.

Here, the wax element is a cylinder from the rod 41 by the pressure of the diaphragm 53 and the diaphragm 53, which expands and contracts according to thermal expansion or contraction of the wax 51 embedded in the cylinder 43, as shown in FIG. It can be configured to include a hydraulic oil 55 for telescopic the 43. Since the configuration of such a wax element can be easily understood by those skilled in the art, a detailed description thereof will be omitted.

That is, the driving means 50 opens the hollow 21 of the other valve housing 20 by raising the cylinder 43 as shown in FIG. 3 through the contraction of the wax 51, or shown in FIG. 5. As described above, the cylinder 43 is lowered to close the hollow 21 of the other valve housing 20.

The guider 60 is a component for movably supporting the cylinder 43 of the on-off valve 40 while allowing the coolant to flow through the hollows 11 and 21 of the one and the other valve housings 10 and 20. For example, as shown in FIG. 4, at least one connecting rod 61 is integrally extended to the end of the other valve housing 20 and embedded in the one valve housing 10 as shown in FIG. 3. can do.

The connecting rod 61 extends along the circumferential direction at the end of the other valve housing 20 as shown in FIG. 4, and communicates the coolant with the spaced apart gaps as the space is formed. When the connecting table 61 is configured as shown in the plurality, as shown in order to secure the rigidity, the ends may be connected to each other, unlike shown may be composed of a semi-circular plate.

Thus, the connecting rod 61 can communicate the coolant through spaced gaps without disconnecting the cylinder 43 at the end as shown in FIG. 3, and as shown in FIG. As the spaced apart by the gap is shielded by the outer peripheral surface of the cylinder 43, the communication of the coolant is blocked.

In addition, unlike the illustrated, the connecting table 61 may protrude in a spaced apart state on the inner circumferential surface of the one side valve housing 10 to communicate the coolant with spaced apart gaps.

On the other hand, the present invention may further comprise an elastic body (SP) for elastically supporting the cylinder 43 of the on-off valve 40 as shown in FIG.

For example, the elastic body SP is configured as a coil spring, as shown in FIG. 3, so that one end thereof is supported by the step 25 formed in the other valve housing 20, and the other end is supported by the cylinder 43. ) Is supported elastically to prevent the cylinder 43 from moving arbitrarily.

On the other hand, the present invention may further comprise a valve seat 44 and the valve member 46 as shown in FIG.

As shown in FIG. 6, the valve seat 44 is formed in a stepped shape in one valve housing 10 to reduce the outlet of the one valve housing 10.

The valve member 46 is provided in one valve housing 10 as shown in FIG. 6 to open and close the valve seat 44 while reciprocating with the cylinder 43.

That is, when the bypass passage 15 described above is provided in one valve housing 10, the valve member 46 moves in accordance with the reciprocation of the cylinder 43 by the driving force of the driving means 50. Open and close the).

Accordingly, the on-off valve 40 closes the one side valve housing 10 through the valve member 46 while opening the other side valve housing 20 through the cylinder 43, and bypass passage with the other side valve housing 20. Communicate 15 and close the other valve housing 20 via the cylinder 43 and telescopic the cylinder 43 at the rod 41 according to the water temperature of the coolant and one valve housing via the valve member 46. Opening 10) communicates the valve housing 10 and the bypass passage 15 on one side.

On the other hand, the present invention may further comprise a clearance providing means for providing a clearance, that is, a clearance in the hollow of the other valve housing 20 shielded by the cylinder 43 of the on-off valve 40.

Such a clearance providing means may be formed in the inner circumferential surface of the other side valve housing 20 in the form of a groove facing the communication direction of the coolant to provide a clearance in which the coolant is communicated as shown in FIG. 4. .

As the communication groove 27 is formed along the longitudinal direction of the other valve housing 20 as shown in FIG. 4 and extends between the above-described connecting rods 61, the inner circumferential surface of the connecting rod 61 is formed by the cylinder 43. Even when shielded, the coolant is communicated to one side valve housing 10. Therefore, the other side valve housing 20 may continuously provide a small amount of coolant to the one side valve housing 10 through the communication groove 27.

On the other hand, the step 25 described above, when the communication groove 27 is provided, as shown in Figure 4 is configured to communicate the coolant to the communication groove (27).

The operation of the present invention including the components as described above will be described.

The vehicle thermostat according to the present invention is installed in the cooling water flow passage in one direction, such as a cooling water flow path through which cooling water flows from the engine to the heater, and communicates the cooling water introduced through the other valve housing 20 to the one side valve housing 10. .

The other side valve housing 20 is a coolant flows into the hollow 21 as shown in FIG.

At this time, when the water temperature of the coolant is a low temperature, the on-off valve 40 overlaps the rod 41 in accordance with the contraction of the wax 51 constituting the drive means 50 as shown in FIG. Move to a state to expose the inner peripheral surface of the connecting table (61). And the cylinder 43 does not move arbitrarily as it is elastically supported by the elastic body SP.

Accordingly, the coolant moves to the hollow 11 of the one valve housing 10 through the spaced gap of the connecting rod 61 from the hollow 21 of the other valve housing 20 and is supplied to the cooling water flow path 1.

On the other hand, when the water temperature of the coolant flowing into the other valve housing 20 is a high temperature, the on-off valve 40 moves while the cylinder 43 is telescopic from the rod 41 by the thermal expansion of the above-described wax 51. As shown in 5, the inner circumferential surface of the connecting table 61 is shielded.

Since the cooling water is spaced apart from the connecting portion 61 by the cylinder 43, the cooling water does not move to the one side valve housing 10 and flows only through the other side valve housing 20.

At this time, as the cooling water is provided by the communication groove 27 formed on the inner circumferential surface of the other valve housing 20, a small amount of the cooling water is continuously supplied to the one valve housing 10 through the communication groove 27.

On the other hand, the thermostat of the present invention is connected to the radiator of the engine and the engine when the bypass passage 15 is provided in one valve housing 10 as shown in Figure 6 to branch the coolant according to the water temperature. For example, one valve housing 10 may be connected to a radiator to supply cooling water in a cooled state, the other valve housing 20 may circulate the engine and supplied discharged cooling water, and the bypass passage 15 may be It may be connected to a water pump, not shown, to supply coolant to the engine.

At this time, when the coolant of the engine introduced into the other valve housing 20 is a low temperature, the on-off valve 40 opens the other valve housing 20 through the cylinder 43 as shown in FIG. By closing one valve housing 10 through 46), the coolant of the other valve housing 20 is supplied to the engine through the bypass passage 15 again.

In addition, the on-off valve 40 closes the other valve housing 20 through the movement of the cylinder 43 by thermal expansion of the wax 51 when the coolant of the engine flowing into the other valve housing 20 is hot. The one side valve housing 10 is opened through the valve member 46 to supply the cooling water cooled by the radiator to the bypass passage 15.

As described above, the vehicle thermostat according to the present invention opens and closes the hollow 21 of the other valve housing 20 while the cylinder 43 constituting the opening / closing valve 40 reciprocates by the driving means 50. Even without the same member, the cooling water flow path can be opened and closed only by the movement of the cylinder 43, and the cylinder 43 is movably supported while the coolant is communicated by the guider 60, so that the cylinder seat is not formed separately. 43) can stably move the coolant while moving.

In addition, as the one side valve housing 10 and the other side valve housing 20 is integrally coupled while being restrained by the coupler 30, assembly and disassembly may be convenient, and thus, manufacturability may be improved.

Specifically, since the coupler 30 is composed of a support 33 for supporting the support jaw 31 of the other valve housing 20 while penetrating the one side valve housing 10, the one valve housing 10 and the other valve housing ( 20) can be assembled quickly with one touch.

In addition, since the wax 51 constituting the driving means 50 drives the cylinder 43 while expanding and contracting in accordance with the water temperature of the cooling water, the cylinder 43 can move smoothly and stably.

In addition, the guider 60 is composed of a connecting rod 61 connected to the end of the other side valve housing 20 in a spaced apart state and is shielded or exposed by the outer circumferential surface of the cylinder 43 as the cylinder 43 moves. Opening and closing of the cooling water can be controlled as well.

In addition, as the cylinder 43 is elastically supported by the elastic body SP, the flow of the cylinder 43 can be prevented, and when the water temperature of the coolant is cooled, the cylinder 43 can quickly return.

In addition, when the valve seat 44 and the valve member 46 are provided, the valve seat 44 is opened and closed while the valve member 46 is interlocked with the cylinder 43 so that one valve housing 10 and the other valve housing ( 20 may be opened and closed alternately with the movement of the cylinder 43.

In addition, as the bypass passage 15 is provided in the one side valve housing 10, the cooling water can be applied to the cooling water flow path branched in a plurality of directions.

In addition, since the communication groove 27 is provided on the inner circumferential surface of the other valve housing 20 to provide clearance, a small amount of coolant may be obtained even when the connecting rod 61 of the other valve housing 20 is shielded by the cylinder 43. Can communicate constantly.

While specific embodiments of the present invention have been described above by way of example, these are for illustrative purposes only and are not intended to limit the protection scope of the present invention. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

10 one side valve housing 11 hollow
15: bypass passage 20: other side valve housing
21: hollow 25: step
27: communication home 30: coupler
31: support jaw 33: support
33a: fork 35: hook
37: screw 40: on-off valve
41: load 43: cylinder
44: valve seat 46: valve member
50: driving means 51: wax
53: diaphragm 55: working oil
60: guider 61: connecting rod
SP: elastic body 1: cooling water flow path

Claims (5)

In the thermostat for a vehicle installed in the cooling water flow path of the engine through which the cooling water flows,
One side of the valve housing is connected to the cooling water flow path, the hollow is formed to communicate the cooling water in the cooling water flow path through the hollow;
An other end coupled to the other end of the one side valve housing, the other end coupled to another cooling water flow passage connected to the cooling water flow passage, and a hollow valve formed to communicate the coolant through the hollow;
A coupler for integrally coupling the one valve housing and the other valve housing by constraining the other valve housing to the one valve housing;
It is formed to shield the rod fixed to the one valve housing and the hollow of the other valve housing has a cylinder that is connected telescopically to the rod, the cylinder is reciprocated by the telescopic operation while opening and closing the hollow of the other valve housing On-off valve;
Driving means for providing a driving force to the on / off valve to telescopic the cylinder of the on / off valve; And
And a guider for movably supporting the cylinder of the on / off valve reciprocated by the driving force of the driving means while allowing the coolant to flow through the hollow of the one side valve housing and the other side valve housing.
The coupler
A support jaw provided inside one of the one side and the other side valve housing; And
And a support for supporting the support jaw while being caught by the support jaw through the one side or the other side of the valve housing. delete The method of claim 1, wherein the driving means,
And a wax element embedded in a cylinder of the on / off valve and having a wax embedded therein to telescopic the cylinder from the rod of the on / off valve while expanding and contracting according to the water temperature of the coolant. In the thermostat for a vehicle installed in the cooling water flow path of the engine through which the cooling water flows,
One side of the valve housing is connected to the cooling water flow path, the hollow is formed to communicate the cooling water in the cooling water flow path through the hollow;
An other end coupled to the other end of the one side valve housing, the other end coupled to another cooling water flow passage connected to the cooling water flow passage, and a hollow valve formed to communicate the coolant through the hollow;
A coupler for integrally coupling the one valve housing and the other valve housing by constraining the other valve housing to the one valve housing;
It is formed to shield the rod fixed to the one valve housing and the hollow of the other valve housing has a cylinder that is connected telescopically to the rod, the cylinder is reciprocated by the telescopic operation while opening and closing the hollow of the other valve housing On-off valve;
Driving means for providing a driving force to the on / off valve to telescopic the cylinder of the on / off valve; And
And a guider for movably supporting the cylinder of the on / off valve reciprocated by the driving force of the driving means while allowing the coolant to flow through the hollow of the one side valve housing and the other side valve housing.
The above-
The thermostat for a vehicle comprising: at least one connecting rod integrally connected to an end of the other valve housing and embedded in the one valve housing. The method according to claim 1 or 4,
The thermostat for a vehicle further comprising; an elastic body for elastically supporting the cylinder of the on-off valve.

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