KR20100117909A - Thermostat valve for vehicle - Google Patents

Abstract

PURPOSE: A thermostat valve for a vehicle is provided to improve strength of a rotary shaft by preventing distortion between the rotary shaft and a rotator. CONSTITUTION: A thermostat valve for a vehicle comprises a drive unit(100), a rotator(200), and a housing(300). The drive unit has a motor(110) and transfers driving force from the motor to a rotary shaft(120). The rotator is separably coupled to the rotary shaft. The housing accepts the drive unit and the rotator. Cooling water moves the housing.

Description

Thermostat Valve for Vehicle

The present invention relates to a thermostat valve for a vehicle that compensates for problems that may occur while driving the thermostat valve with a motor.

In general, the thermostat valve installed in the vehicle is provided at the outlet of the coolant passage of the cylinder head to automatically open and close the passage according to the change of the coolant temperature inside the engine.

When the coolant temperature is below normal, the valve is closed to circulate through the bypass passage so that the coolant does not flow to the radiator, and the open and closed states are changed in accordance with the change of the coolant temperature.

Conventional thermostats have used a method that is operated by wax that is stretched according to the temperature of the coolant that is in contact, but the response is lowered, and active measures are difficult due to various driving conditions. It was necessary.

SUMMARY OF THE INVENTION An object of the present invention is to provide a thermostat valve for a vehicle in which a rotating shaft and a rotator are configured to be separated from each other.

An object of the present invention is to provide a thermostat valve for a vehicle that can minimize the generation of vibration that can occur when the rotator is rotated.

An object of the present invention is to provide a thermostat valve for a vehicle capable of securing the rigidity of the rotating shaft by preventing the twist that may occur between the rotating shaft and the rotator.

It is an object of the present invention to provide a thermostat valve for a vehicle which enables a stable shaft alignment between a rotating shaft and a rotator.

In order to achieve the above object, a thermostat valve for a vehicle according to the present invention includes a driving unit for transmitting a driving force generated in the motor to a rotating shaft; A rotator detachably coupled to the rotating shaft, the rotator configured to axially align the rotating shaft, and having the rotating shaft as a concentric shaft; And a housing in which the driving unit and the rotator are accommodated and the coolant flows.

The housing is provided with a damping part for pressing the rotator downward along with vibration reduction generated along the rotation axis.

The housing further includes a sealing cover inserted into the rotator and rotated by the housing and low friction inside the housing.

The driving part is formed with an insertion groove recessed in the longitudinal direction at the end of the rotation shaft.

The damping unit is located inside the insertion groove.

The damping unit according to the present invention includes a spring that is elastically deformed according to the pressure change of the cooling water; Located on the lower side of the spring is configured to include a coupling pin for transmitting the rotational force of the rotating shaft to the rotator.

In the rotator according to the present invention, a cover is formed on the rotator to prevent the sealing cover from being lifted upward. The cover is provided with a coupling groove into which the coupling pin is inserted.

In the housing according to the present invention, a first guide part is formed on the inner lower part to prevent twist between the rotating shaft and the rotator according to the rotation of the rotator and to align the shaft.

The first guide portion has a lower end of the rotator is seated and is formed with a first stepped portion for preventing the movement in the transverse direction.

The first stepped portion is provided with an extension piece extending in an upward direction on the bent upper surface.

The rotator according to the present invention is provided with a second guide portion in surface contact with the first guide portion.

A second stepped part formed along an edge of the lower end of the rotator and in surface contact with the first stepped part; The protrusion is provided at a position spaced outwardly from the second stepped portion and the rotator is in linear contact with the inner circumferential surface of the housing such that the rotator is rotatable by low friction.

The rotator according to the present invention has a separation distance h between the inner circumferential surface of the sealing cover and the outer circumferential surface of the rotator and is located inside the housing.

According to another aspect of the present invention, there is provided a thermostat valve including: a driving unit configured to transfer a driving force generated from a motor to a rotating shaft; A rotator detachably coupled to the rotating shaft to achieve axial alignment of the rotating shaft and having the rotating shaft as a concentric shaft; A housing in which the driving unit and the rotator are accommodated and the coolant flows; A sealing cover inserted into the rotator and rotating by the housing and low friction; And a damping part installed inside the housing and configured to press the rotator downward along with vibration reduction generated along the rotation axis.

The damping unit is located in the insertion groove formed at the end of the rotating shaft and the spring is elastically deformed according to the pressure change of the cooling water; Located on the lower side of the spring is configured to include a coupling pin for transmitting the rotational force of the rotating shaft to the rotator.

Hereinafter, with reference to the accompanying drawings, an embodiment of a thermostat valve for a vehicle according to the present invention with reference to the accompanying drawings.

1 is an exploded perspective view of a vehicle thermostat valve for a vehicle according to the present invention, FIG. 2 is a combined perspective view of a vehicle thermostat valve for a vehicle according to the present invention, FIG. 3 is a longitudinal cross-sectional view of a vehicle thermostat valve according to the present invention. 4 is an enlarged cross-sectional view of a portion of a vehicle thermostat valve for a vehicle according to the present invention, and FIG. 5 is an operational state diagram of the vehicle thermostat valve according to the present invention.

1 to 4, the thermostat valve 1 for a vehicle according to the present invention is provided with a sealing cover 400 and a rotator 200 inside the housing 300 to which the coolant moves, and the rotator 200. ) Is connected to the driving unit 100 located above the sealing cover 400 is assembled into a body.

The housing 300 includes an upper housing 310 on which the driving unit 100 is mounted; It is coupled to the lower side of the upper housing 310 and the cooling water inflow passage 322 into which the coolant flows, and the engine and radiator branch flow passage formed so that the cooling water introduced through the cooling water inflow passage 322 can move to the engine or the radiator ( And a lower housing 320 formed with 324 and 326.

In the upper housing 310, a seating groove into which the motor 110 provided in the driving unit 100 is inserted is separately formed, and a plurality of gear assemblies connected to the motor shaft of the motor 110 are inserted into the motor 110. It is configured to be located separately from the seating groove.

The driving force of the motor 100 transmitted through the gear assembly is configured to be transmitted to the rotating shaft 120 connected with the gear assembly.

The engine and radiator branch flow paths 324 and 326 serve as passages through which the coolant moves.

A packing member 600 is provided between the upper housing 310 and the lower housing 320 to block the inflow of coolant into the driving unit 100. The packing member 600 blocks the external leakage of the coolant moving through the lower housing 320 and serves to block the inflow of the coolant into the driving unit 100 provided with the motor 110 and the PCB.

The rotator 200 according to the present invention has a tubular shape, is installed on the rotating shaft 120 and the concentric shaft, and is installed to be separated from the driving unit 100.

That is, before the rotation shaft 120 and the rotator 200 are assembled in a separated state, the assembly is made so that the rotator 200 receives the rotation force transmitted through the rotation shaft 120.

The rotator 200 has a through hole 204 which serves as a passage through which the coolant moves, and the through hole 204 has the same size and shape as the through hole 410 of the sealing cover 400 to be described later. Is done.

The reason why the rotating shaft 120 and the rotator 200 are separated in this way will be described later in the detailed description.

The sealing cover 400 has a through hole 410 formed in the longitudinal direction. The through hole 410 is formed to have a semi-circle shape before the divided sealing cover 400 is coupled, but when the sealing cover 400 is coupled to each other, the opening is formed in a circular or circular shape as shown in the drawing. The through holes 410 are formed.

The through hole 410 is characterized by having the same diameter as the hole diameter of the opening of the branch passage 302. This is because, when the through hole 410 has a diameter different from that of the engine and radiator branch passages 324 and 326, it is impossible to achieve a stable movement of the coolant due to the difference in diameter.

The damping unit 500 according to the present invention is positioned between the rotation shaft 120 and the rotator 200 and configured to press the rotator 200 downward along with vibration reduction generated along the rotation shaft 120. do.

An insertion groove 122 recessed in the longitudinal direction is formed at an end of the rotation shaft 120, and a damping part 500 is coupled to the insertion groove 122.

The damping unit 500 is provided with a spring 510 that is elastically deformed according to the pressure change of the cooling water. The spring 510 uses a coil spring, and other types of springs may be used.

In addition, the coupling pin 520 is disposed below the spring 510 and transmits the rotational force of the rotation shaft 120 to the rotator 200. The coupling pin 520 is coupled to the insertion groove 122 of the rotating shaft 510 is operated in the same direction as the rotation direction of the rotating shaft 510.

In the rotator 200, a cover 210 is formed on the rotator 200 to prevent the sealing cover 300 from being lifted upward.

The cover 210 may be formed integrally with the rotator 200, or may be made separately, and is provided with a bent end bent to the outside of the rotator 200, so that an upper end of the sealing cover 400 is below the bent end. It is installed to be in close contact with the side.

As such, when the sealing cover 400 is installed in close contact with the bent end formed on the cover 210, the sealing cover 400 is stably prevented from moving upward.

The cover is provided with a coupling groove 202 into which the coupling pin 520 is inserted, and a through hole is formed so that the rotating shaft 120 is inserted into the coupling groove 202.

In the housing 300 according to the present invention, a first guide part 310 is formed at an inner lower portion to prevent twist between the rotation shaft 120 and the rotator 200 according to the rotation of the rotator 200 and to align the shaft.

The first guide part 310 is located at an inner connection portion of the housing 300 to which the cooling water inflow passage 322 and the housing 300 are connected.

A lower end of the rotator 200 is seated on the first guide part 310, and a first stepped part 312 is formed to prevent movement in the lateral direction. When the inner diameter of the cooling water inflow passage 322 is d1, the first stepped portion 312 has a diameter of the second stepped portion 312 having a diameter of d2 which is relatively larger than d1.

Although the diameters of d1 and d2 are not mentioned in detail, the diameters of d2 are relatively larger than that of d1, and the deformation and fatigue fracture of the rotator 200 and the rotation shaft 120 are observed. It is advantageous to prevent failure.

The first stepped portion 312 is provided with an extension piece 312a extending in an upward direction on the bent upper surface. The extension piece 312a prevents the rotator 200 from being separated from the first step 312 when the rotator 200 is moved upward of the housing 300 according to the pressure variation of the coolant. To make it possible.

The rotator 200 is provided with a second guide portion 220 in surface contact with the first guide portion 310.

The second guide part 220 is formed along the edge of the lower end of the rotator 200 and has a second stepped part 222 which is in surface contact with the first stepped part 312.

The second stepped portion 222 has a tubular shape having a diameter d3 which is similar to the inner diameter d2 formed on the first stepped portion 312.

In addition, a protrusion provided at a position spaced outwardly of the second stepped portion 222 and the rotator 200 is in linear contact with the inner circumferential surface of the housing 300 such that the rotator 200 is rotatable by low friction with the inner circumferential surface of the housing 300. 224 is configured to be provided.

The protrusion 224 has a minimum contact with the inner circumferential surface of the housing 300 to reduce the frictional torque caused by the rotation of the rotator 200, and preferably has a triangular cross section, but is not limited thereto.

The rotator 200 according to the present invention has a separation distance h between the inner circumferential surface of the sealing cover 400 and the outer circumferential surface of the rotator 200 and is located inside the housing 300.

The separation distance h refers to a distance for reducing friction torque that may be generated by surface contact with the sealing cover 300 when the rotator 200 rotates. The numerical value for the separation distance h is not particularly limited.

The assembling state and the operating state of the vehicle thermostat valve according to the present invention configured as described above will be described with reference to the drawings.

1 or 4, the thermostat valve 1 according to the present invention is coupled to the sealing cover 200 coupled with the rotator 200 inside the lower housing 320.

The coupling pin 520 is inserted into the coupling groove 202 of the rotator 200, and the coupling pin 520 is located inside the insertion groove 122 of the rotation shaft 120 provided in the driving unit 100. Are combined.

The upper housing 310 is provided with a seating groove in which the motor 110 is seated, thereby preventing the cooling water from flowing into the motor 110 through the lower housing 320 through which the cooling water flows, and on the rotating shaft 120. The combined packing member 600 blocks the inflow of the coolant to the upper side of the rotator 200.

The rotator 200 has a seating groove in which the packing member 600 is inserted to a predetermined thickness at a position where the coupling groove 202 is formed, and thus the coupling is performed.

A cover housing is provided on the upper portion of the upper housing 310 to cover the upper portion of the upper housing 310 coupled with the lower housing 320 and is mounted by screws provided separately.

Referring to FIG. 2, when the thermostat valve 1 is assembled, the assembly is completed as shown in the drawing.

Referring to FIG. 3 or FIG. 5, it can be seen that the rotating shaft 120 and the rotator 200 are detachably connected to each other via the coupling pin 520 as shown in the drawing.

Referring to the drawings, a state in which the rotator according to the present invention is prevented from flowing in the up and down directions will be described.

As the engine (not shown) is turned on while the driver is in the vehicle, the coolant is pumped and moved through the water pump (not shown) and then moved to the coolant inflow passage 322 of the thermostat valve 1.

The cooling water introduced from the cooling water inflow channel 322 flows into the radiator branch channel 326 by flowing into the inside of the housing 320.

As the coolant moves through the inside of the housing 300, a lift force is generated to lift the rotator 200 from the lower side to the upper side due to the pressure variation of the cooling water.

The lifting force is finally transmitted to the spring 510 holding the coupling pin 502 via the coupling pin 520 located on the cover 210 of the rotator 200. The spring 510 is elastically deformed to attenuate the lift force by elastically deformed to attenuate the lift force of the rotator 200 due to a sudden pressure change of the coolant flowing through the interior of the housing 300 due to its elastic deformation. .

Before the spring 510 is operated as above, the coupling pin 520 connected to the spring 510 is always pressed downward, and the rotator 200 instantly rises due to the pressure fluctuation of the cooling water. In addition, the flow is prevented from occurring along the longitudinal direction of the housing 300.

The sealing cover 400 is prevented from being moved by the bent end formed in the cover 210 even when a rising force is generated in response to the pressure change of the cooling water.

A shaft alignment state between the shaft and the rotator provided in the thermostat valve according to the present invention will be described.

Referring to FIG. 3 or FIG. 5, the driving unit 100 transmits the driving force generated from the motor 110 to the shaft 120, and the rotator 200 has the shaft 120 inside the lower housing 320. Rotation is operated in the same direction as the rotation direction.

The motor 110 is rotated by a control unit (not shown) provided separately to perform the forward and reverse rotation and to transmit the rotational force to the shaft (120).

As the shaft 120 is repeatedly rotated in the same manner as the rotation state of the motor 110, an unstable shaft alignment may occur between the shaft 120 and the rotator 200.

In the lower housing 320 according to the present invention, the second stepped portion 222 provided in the rotator 200 to the first stepped portion 312 formed in the lower housing 320 to enable stable rotation of the rotator 200. ) Is in surface contact with the lower end of the rotator 200 does not cause unstable flow in the left and right directions.

That is, the flow in the up and down directions is attenuated by the spring 510 while the flow in the left and right directions is relatively rotated by the surface contact between the first and second stepped portions 312 and 222. Stable shaft alignment between the shaft 120 and the rotator 210 is possible. (The first and second step portions 312 and 222 are shown in close contact with each other in the drawing. It is spaced apart from the inner circumferential surface of (300))

A shaft alignment state between the shaft and the rotator provided in the thermostat valve according to the present invention will be described.

As the shaft 120 is rotated, the rotator 200 is rotated to the left and right, and when the rotator 200 rotates, friction with the inner circumferential surface of the lower housing 320 occurs. The friction is converted to friction torque that interferes with the torque generated in the motor 110, causing unnecessary increase in driving force of the motor 110.

The rotator 210 according to the present invention is linearly in contact with the inner bottom surface of the lower housing 320 when the protrusion 224 for rotating with low friction torque is maintained while maintaining a minimum contact area when the rotator 210 rotates on the lower housing 320. .

The rotator 200 is rotated in a state where the protrusion 224 is in linear contact with the lower housing 320 while only the second stepped portion 222 and the protrusion 224 are in contact with the lower housing 320. And maintains minimal friction torque.

At this time, the rotator 200 is a stable rotation by receiving the rotational force of the rotary shaft 120 without unnecessary friction with the sealing cover 400 by the separation distance (h) formed between the outer circumferential surface of the rotator 200 and the inner circumferential surface of the sealing cover 400 This is done.

1 is an exploded perspective view of a thermostat valve for a vehicle according to the present invention.

Figure 2 is a perspective view of the combined thermostat valve for a vehicle according to the present invention.

3 is a longitudinal sectional view of a thermostat valve for a vehicle according to the present invention;

4 is an enlarged cross-sectional view of a portion of a vehicle thermostat valve according to the present invention;

5 is an operational state diagram of a thermostat valve for a vehicle according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: Thermostat valve 100: Drive part

110: motor 120: rotating shaft

200: rotator 202: coupling groove

300: housing 310: upper housing

320: lower housing 400: sealing cover

500: damping part 510: spring

520: coupling pin

Claims (16)

A driving unit having a motor and transmitting a driving force generated by the motor to a rotating shaft; A rotator detachably coupled to the rotating shaft, the rotator configured to axially align the rotating shaft, and having the rotating shaft as a concentric shaft; And The thermostat valve for a vehicle, characterized in that the drive unit and the rotator is accommodated therein and comprises a housing through which a flow of coolant flows. According to claim 1, The housing thermostat valve is characterized in that the housing is provided with a damping portion for pressing the rotator in the downward direction with vibration reduction generated along the rotation axis. According to claim 1, The housing is a thermostat valve for the vehicle, characterized in that it further comprises a sealing cover which is inserted into the rotator and rotated by the housing and low friction in the housing. According to claim 1, The drive unit The thermostat valve for a vehicle, characterized in that the insertion groove is formed in the longitudinal direction at the end of the rotation shaft. The method according to claim 2 or 4, The damping unit is a thermostat valve for a vehicle, characterized in that located in the insertion groove. The method of claim 2, The damping unit is elastically deformed according to the pressure change of the cooling water; Located in the lower side of the spring thermostat valve for a vehicle comprising a coupling pin for transmitting the rotational force of the rotating shaft to the rotator. According to claim 1, The rotator has a thermostat valve for a vehicle, characterized in that the cover is formed on top of the rotator to prevent the sealing cover is lifted upward. The method according to any one of claims 6 to 7, The cover of the vehicle thermostat valve, characterized in that the coupling groove is formed in which the coupling pin is inserted. According to claim 1, The housing The thermostat valve for a vehicle, characterized in that the first guide portion for preventing the torsion between the rotating shaft and the rotator due to the rotation of the rotator formed on the inner lower portion. The method of claim 9, The first guide portion A thermostat valve for a vehicle, characterized in that the lower end of the rotator is seated and a first stepped portion is formed to prevent movement in the lateral direction. The method of claim 10, The thermostat valve for a vehicle, characterized in that the first stepped portion is provided with an extension piece extending in an upward direction on the bent upper surface. The method of claim 9, The rotator has a thermostat valve for a vehicle, characterized in that the second guide portion which is in surface contact with the first guide portion. The method according to any one of claims 11 or 12, The second guide portion A second stepped portion formed along an edge of the lower end of the rotator and in surface contact with the first stepped portion; The thermostat valve for a vehicle, characterized in that it comprises a protrusion provided in a position spaced outwardly of the second step portion and the rotator is in line contact with the inner circumferential surface of the housing so that the rotator is rotatable by low friction. The method of claim 3, The rotator is The thermostat valve for a vehicle, characterized in that it has a separation distance (h) between the inner peripheral surface of the sealing cover and the outer peripheral surface of the rotator and located inside the housing. A driving unit for transmitting the driving force generated from the motor to the rotating shaft; A rotator detachably coupled to the rotating shaft to achieve axial alignment of the rotating shaft and having the rotating shaft as a concentric shaft; A housing in which the driving unit and the rotator are accommodated and the coolant flows; A sealing cover inserted into the rotator and rotating by the housing and low friction; And And a damping part installed in the housing and configured to press the rotator downward along with vibration reduction generated along the rotation axis. The method of claim 15, The damping unit is located in the insertion groove formed at the end of the rotating shaft and the spring is elastically deformed according to the pressure change of the cooling water; Located in the lower side of the spring thermostat valve for a vehicle comprising a coupling pin for transmitting the rotational force of the rotating shaft to the rotator.

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