KR101568338B1 - Electronic valve for muffler - Google Patents

Abstract

An electronic valve for a muffler according to the present invention comprises: a housing of a pipe shape wherein an exhaust gas flow path is formed in the inner side; a rotary shaft combined to penetrate the housing in a direction which crosses the exhaust gas flow path; a gate to open and close the exhaust gas flow path as the rotary shaft is rotated by being combined to the rotary shaft inside the housing; an actuator wherein a drive shaft is located on the point separated from one end of the longitudinal direction of the rotary shaft; and a spring which is formed in a shape that the middle end is wound as a coil shape and transfers rotary force of the drive shaft to the rotary shaft of which both ends of the longitudinal direction are combined to the rotary shaft and the drive shaft. The electronic valve for a muffler according to the present invention can control an exhaust gas output by actively opening and closing an exhaust gas discharge flow path and prevent damage to each component by preventing a phenomenon, wherein vibrations applied to the exhaust gas discharge flow path are transferred to the driving device side. Productivity is high since assembly of each of the components is excellent. Stable operation is possible since power transfer reliability is high.

Description

[0001] The present invention relates to an electronic valve for muffler,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a valve installed in a muffler of a vehicle to improve the output performance and noise performance of a vehicle, and more particularly to a valve that is capable of actively adjusting the amount of opening / To a solenoid valve for a vehicle.

A muffler for a vehicle is a device for reducing the explosion sound generated by the rapid expansion of exhaust gas by lowering the pressure and temperature before discharging the high temperature and high pressure exhaust gas discharged from the engine to the atmosphere outside the vehicle.

The silencer is an inflatable type that spreads from a thin pipe to a wide space in accordance with its working principle, and a resonance type (resonance type) that diffuses sound from a large number of holes of a thin tube into a wide resonance chamber (A metal-threaded type), and a bulkhead type in which the above three methods are mixed.

In order to increase the noise reduction effect of the silencer, it is possible to reduce the exhaust noise by increasing the resistance of the silencer. However, in order to lower the output of the engine due to the increase of the resistance applied to the exhaust stroke, There is a problem that exhaust noise is increased.

In order to solve such a problem, a variable valve mount type silencer capable of simultaneously satisfying exhaust noise and back pressure is disclosed. The variable valve mount silencer is characterized by having a bypass valve or a variable valve installed on the partition wall in the silencer and adjustable in opening degree according to the pressure of the exhaust gas.

Such a variable valve is in a closed state due to a low exhaust gas pressure in a low speed range, so that low-frequency noise can be attenuated and the pressure of the exhaust gas is low even in the closed state of the variable valve. As the pressure of the exhaust gas increases in the high-speed region, the variable valve is gradually opened to reduce the high-frequency noise, reduce the resistance of the exhaust gas, and also does not affect the output of the engine. Thus, the variable valve mount silencer has the advantage of satisfying the exhaust noise and the back pressure at the same time.

However, the conventional variable valve is disadvantageous in that it can not control the exhaust gas discharge amount according to the RPM because the opening and closing amount is automatically controlled manually according to the exhaust gas flow rate. That is, when the RPM is increased to increase the flow rate of the exhaust gas, the flow rate of the exhaust gas discharged to the outside can not be actively controlled, so that there is a disadvantage that there is a limit in adjusting the exhaust noise and the back pressure.

In order to solve such a problem, a method of forcibly opening and closing the variable valve by a separate driving device has been proposed. However, when vibration is applied to the variable valve by exhaust gas discharge, the vibration is transmitted to the driving device side There is a problem that component damage is caused.

KR 10-1195846B1

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems, and it is an object of the present invention to actively open and close the exhaust gas discharge passage, to prevent the vibration applied to the exhaust gas discharge passage from being transmitted to the drive device, And to provide a solenoid-operated valve for a muffler which has high assemblability and high reliability of power transmission.

According to another aspect of the present invention, there is provided a solenoid valve for a muffler, comprising: a pipe-shaped housing having an exhaust gas flow path therein; A rotating shaft coupled to penetrate the housing in a direction across the exhaust gas flow path; A gate coupled to a rotating shaft inside the housing to open and close the exhaust gas channel as the rotating shaft rotates; An actuator in which a driving shaft is located at a position spaced apart from one longitudinal end of the rotating shaft; And a spring that has a shape in which a stop is wound in a coil shape and both longitudinal sides thereof are coupled to the rotation shaft and the drive shaft to transmit the rotation force of the drive shaft to the rotation shaft.

A pair of fastening slits having a depth in a direction toward the center of the head portion and a length in a direction perpendicular to the longitudinal direction of the rotary shaft are formed on both sides of the head portion at one end in the longitudinal direction of the rotary shaft, A clip portion having a first extension bar and a second extension bar inserted into the pair of fastening slits in a slidable manner along a longitudinal direction of the fastening slit, respectively, at one longitudinal side of the spring.

The driving shaft is arranged in a line with the rotating shaft, and a receiving groove having a length in the radial direction is formed at an end toward the rotating shaft, and a receiving bar is inserted into the receiving groove at the other longitudinal side of the spring.

The first extending bar and the second extending bar are arranged in parallel so as to be spaced apart from each other by a distance between the pair of fastening slits, and a protruding protrusion protruding toward the second extending bar is formed at an end of the first extending bar.

The protruding jaw is positioned at a point past the fastening slit when the first extension bar and the second extension bar are inserted into the pair of fastening slits as far as possible.

The inlet bar is arranged parallel to the first and second extension bars.

The electromagnetic valve for a silencer according to the present invention can actively open and close the exhaust gas discharge passage so that the exhaust gas discharge amount can be controlled and the vibration applied to the exhaust gas discharge passage side can be prevented from being transmitted to the drive device side It is possible to prevent the parts from being damaged and to assure high productivity because each part is assembled and the reliability of the power transmission is high.

1 is a perspective view of a solenoid valve for a silencer according to the present invention.
2 is a front view of a solenoid valve for a silencer according to the present invention.
3 is an exploded perspective view of a solenoid valve for a silencer according to the present invention.
4 is an exploded perspective view showing a structure in which a drive shaft and a rotary shaft are connected by a spring.
5 is a perspective view showing a coupling structure of a rotating shaft and a spring.
6 and 7 are horizontal sectional views sequentially showing the process of coupling the spring to the head portion of the rotary shaft.

Hereinafter, an embodiment of a solenoid valve for a silencer according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a solenoid valve for a silencer according to the present invention, FIG. 2 is a front view of the solenoid valve for a silencer according to the present invention, and FIG. 3 is an exploded perspective view of the solenoid valve for a silencer according to the present invention.

The electromagnetic valve for a muffler according to the present invention is installed in a muffler of a vehicle to improve the output performance and noise performance of a vehicle. The muffler includes a pipe-shaped housing 100 having an exhaust gas passage 110 therein, A rotating shaft 200 coupled to the housing 100 so as to penetrate the gas flow path 110 in a direction perpendicular to the flow direction of the exhaust gas and a housing 100 of the rotating shaft 200, A gate 300 connected to a portion of the housing 100 to open and close the exhaust gas passage 110 of the housing 100 by being rotated together with the rotary shaft 200 when the rotary shaft 200 is rotated, And an actuator 400 for operating the gate 300 by transmitting the rotational force of the rotation shaft 410 to the rotation shaft 200. The actuator 400 is coupled to the upper side of the housing 100 by a heat cover 420 and a bracket 430 mounted on the bottom of the housing 400 so as to minimize frictional force with the housing 100 when the rotary shaft 200 rotates. A bearing 220 and a bearing cap 230 are provided at a portion where the rotating shaft 200 and the housing 100 are in contact with each other.

The actuator 400 is configured to receive a signal related to the opening and closing of the exhaust gas passage 110 from the ECU of the vehicle and to rotate the gate 300. Therefore, when the electromagnetic valve for a silencer according to the present invention is used, The amount of valve opening / closing can be actively controlled by controlling the operation of the actuator 400 instead of manually determining the valve opening / closing amount, so that the exhaust noise and the back pressure can be appropriately adjusted according to various conditions.

The rotating shaft 200 and the gate 300 mounted in the housing 100 are vibrated by the exhaust gas passing through the exhaust gas passage 110. The driving shaft 410 is directly coupled to the rotating shaft 200, The vibration of the rotating shaft 200 is transmitted to the actuator 400 through the driving shaft 410, which may damage the actuator 400.

The solenoid valve for a silencer according to the present invention is configured such that the rotary shaft 200 and the drive shaft 410 are not directly coupled but are spaced apart from each other by a predetermined distance and absorb vibration of the rotary shaft 200 And the spring 500, which can be connected to each other. One end of the spring 500 is wound into a coil shape and the other end of the spring 500 is coupled to the rotating shaft 200. The other end of the spring 500 is wound on the driving shaft 200, (Not shown).

In this case, the spring 500 is configured such that the rotational force of the driving shaft 410 applied to the upper side can be transmitted to the lower side coupled with the rotating shaft 200, that is, when the upper side coupled with the driving shaft 410 is rotated, It is preferable to have a rigidity higher than a reference value so as to be able to be rotated to the lower side coupled with the lower case 200 and to have elasticity higher than a reference value so that the vibration applied to the lower side is not transmitted to the upper side. When the rotary shaft 200 and the drive shaft 410 are connected to each other by the spring 500 having the rigidity and elasticity equal to or higher than the reference value, the rotational force of the drive shaft 410 is transmitted to the rotary shaft 200 through the spring 500 It is possible to open and close the exhaust gas passage 110 and prevent the vibration of the actuator 400 from being transmitted to the drive shaft 410 even if vibration is generated in the rotary shaft 200 .

For example, when the rotating shaft 200 vibrates in the up-and-down direction, the spring 500 can compress the upward and downward vibrations of the rotating shaft 200 by repeating the process of compressing and tensioning the longitudinal direction of the rotating shaft 200, When the rotary shaft 200 vibrates in the left-right direction, the spring 500 repeats the left-and-right bending operation, thereby vibrating the rotary shaft 200 in the lateral direction.

The drive shaft 410 and the rotary shaft 200 may be arranged in any pattern as long as they can transmit rotational force through the spring 500 in a state of being spaced apart from each other. The spring 500 connecting the drive shaft 410 and the rotary shaft 200 must be rotated in a bent state, so that a loss may be generated during the transmission of the rotational force. Therefore, it is preferable that the drive shaft 410, the spring 500, and the rotary shaft 200 are arranged in a row as shown in FIG. 2 so as to transmit the rotational force more stably.

4 is an exploded perspective view showing the structure in which the drive shaft 410 and the rotary shaft 200 are connected by the spring 500 and FIG. 5 shows the combined structure of the rotary shaft 200 and the spring 500 It is a perspective view.

The spring 500 included in the present invention is disposed between the rotating shaft 200 and the driving shaft 410 and has one side in the longitudinal direction (lower side in this embodiment) coupled to the rotating shaft 200, (Upper side in the embodiment) is coupled to the driving shaft 410 to transmit power between the rotating shaft 200 and the driving shaft 410. In this case, when a separate fastening unit is further required to couple both sides of the spring 500 to the rotating shaft 200 and the driving shaft 410, the cost for forming the fastening unit is added, Not only the total manufacturing cost of the valve is increased but also the assembling process of coupling both sides of the spring 500 to the rotating shaft 200 and the driving shaft 410 becomes complicated and the productivity is lowered.

Accordingly, both sides of the spring 500 are coupled to the rotating shaft 200 and the driving shaft 410 so as to be coupled to the rotating shaft 200 and the driving shaft 410 without a separate fastening unit. desirable.

When the upper side of the spring 500 extends upward and is inserted to be inserted into the driving shaft 410, when the driving shaft 410 is rotated, the upper side of the spring 500 is not rotated but only the driving shaft 410 is rotated In other words, there is a possibility that the drive shaft 410 is idle and the power transmission is not normally performed.

Therefore, the upper side of the spring 500 is preferably coupled to the driving shaft 410 in the radial direction of the driving shaft 410. 4, a seating groove 412 having a length in the radial direction is formed at the lower end of the driving shaft 410 (toward the rotating shaft 200) And an inlet bar 510 extending in the longitudinal direction of the seating groove 412 and drawn into the seating groove 412 may be formed on the upper side. When the insertion bar 510 is inserted into the seating groove 412, there is no possibility that the inlet bar 510 is detached from the seating groove 412 even if the spring 500 rocks to the left and right, Since the inlet bar 510 is rotated along the seating groove 412 when the center bar 500 is rotated about the longitudinal center axis, the power transmission can be more stably performed.

Of course, when the downward external force is applied to the inlet bar 510, the inlet bar 510 can be detached from the receiving groove 412 even when the inlet bar 510 is inserted into the receiving groove 412. In order to move downward the inlet bar 510, the spring 500 needs to be compressed as a whole. Since a relatively large force is required to compress the spring 500, the inlet bar 510 is intentionally moved from the seating groove 412 The inlet bar 510 is maintained in the state in which it is pulled into the seating groove 412 as long as it is not pulled out.

The structure in which the lower side of the spring 500 is coupled to the rotary shaft 200 may be the same as the structure in which the upper side of the spring 500 is coupled to the drive shaft 410. However, When the spring 500 is mounted between the driving shaft 410 and the rotary shaft 200, the spring 500 is repelled during the assembling process, That is, a phenomenon in which the driving shaft 410 and the rotary shaft 200 are separated from each other frequently occurs, there is a disadvantage that there is a lot of difficulty in assembling. Particularly, when the skill of the operator is low, since the assembling work of compressing the spring 500 and inserting and mounting the drive shaft 410 and the rotary shaft 200 takes a lot of time, there is a problem that productivity is significantly lowered .

When the spring 500 is mounted on the drive shaft 410 or the rotary shaft 200 without being fixedly connected to the drive shaft 410 or simply mounted on the rotary shaft 200 as described above, There is a problem that the rotating shaft 200 may be detached from the rotating shaft 410. Therefore, it is preferable that the lower side of the spring 500 is coupled to the rotary shaft 200 in a clip coupling manner.

4, a head portion 210 is formed at one end of the rotary shaft 200 in the longitudinal direction. The head portion 210 has a depth toward the center of the head portion 210, A pair of fastening slits 212 having a length in a direction perpendicular to the longitudinal direction of the shaft 200 (forward and backward direction in this embodiment) are formed, and a clip is formed on the lower side of the spring 500, And a clip portion 520 slidingly coupled to the pair of fastening slits 212 may be provided.

The clip unit 520 is configured to include a first extension bar 522 and a second extension bar 524 that extend along the longitudinal direction of the fastening slit 212 and are spaced apart from each other in parallel, The extension bar 522 and the second extension bar 524 are inserted into the pair of fastening slits 212 in a sliding manner.

When the clip portion 520 is inserted into the pair of fastening slits 212 as described above, even if an external force is applied to the portion where the spring 500 and the rotary shaft 200 are connected, And the rotating shaft 200 can be stably maintained in a mutually coupled state. The operator assembling the solenoid valve according to the present invention first attaches the clip portion 520 of the spring 500 to the head portion 210 of the rotary shaft 200 and then inserts the inlet bar 510 of the spring 500, It is possible to stably assemble the spring 500 between the drive shaft 410 and the rotary shaft 200 without fear of detaching the spring 500 by inserting the spring 500 into the seating groove 412 of the drive shaft 410 . When the assembly of the spring 500 is facilitated, productivity of the electromagnetic valve is improved, and even if the skill of the operator is low, the assembly failure rate can be significantly reduced.

The insertion bar 510 is inserted into the seating groove 412 so that the insertion bar 510 can be inserted into the seating groove 412 during the assembling process of inserting the clip 520 into the head 210 of the rotary shaft 200. [ It is preferably arranged in parallel with the first extension bar 522 and the second extension bar 524. When the inlet bar 510, the first extension bar 522, and the second extension bar 524 are arranged in parallel, the first extension bar 522 and the second extension bar 524 are connected to each other by a pair of fastening members It is possible to put the product into the mounting groove 412 up to the inlet bar 510 by a single operation of pushing the product into the slit 212, so that it is possible to obtain an effect that the product assembly becomes very simple.

6 and 7 are horizontal sectional views sequentially showing the process of coupling the spring 500 to the head portion 210 of the rotary shaft 200. As shown in FIG.

The distance between the first extension bar 522 and the second extension bar 524 is set to be shorter than the distance between the pair of fastening slits (524) so that the clip portion 520 can be held in a fixed state while being coupled to the head portion 210 212) apart from each other. At this time, the first extension bar 522 is projected toward the second extension bar 524 at the end of the first extension bar 522 so that the clip unit 520 can be more closely attached to the inner end of the pair of fastening slits 212 A protruding protrusion 526 can be formed. When the protrusion 526 is formed in the first extension bar 522 as described above, the distance d between the protrusion 526 and the second extension bar 524 is smaller than the distance between the pair of the engagement slits 212 D), the first extending bar 522 and the second extending bar 524 can be more reliably pressed on the inner ends of the pair of fastening slits 212.

At this time, when the first extension bar 522 and the second extension bar 524 are pushed into the fastening slit 212, the positions of the first extension bar 522 and the second extension bar 524 are changed to the fastening slit The distance between the pair of fastening slits 212 is set such that the tip end side and the distal end side are spaced apart from each other so that the first extension bar 522 and the second extension bar 524 can be normally pulled into the fastening slit 212. [ It is preferable to be formed in a narrowed shape.

In order to prevent the clip portion 520 from being easily detached when the clip portion 520 is inserted into the head portion 210 to the end, (Not shown). When the protruding step 526 is formed on the end side of the first extending bar 522 as described above, the first extending bar 522 and the second extending bar 522 are slid while the clip part 520 is pushed into the pair of fastening slits 212. [ When the clip portion 520 is fully inserted, the protruding protrusion 526 is positioned at the distal end side of the pair of clamping slits 212, as shown in FIG. 7, The first extension bar 522 and the second extension bar 524 are returned to their original state (mutually parallel state). That is, the protruding protrusion 526 functions as a latching protrusion for preventing the clip from coming off the head unit 210, so that the clip can be stably coupled to the head unit 210.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: housing 110: exhaust gas channel
200: rotating shaft 210: head portion
212: fastening slit 220: bearing
230: bearing cap 300: gate
400: actuator 410: drive shaft
412: seating groove 420: heat cover
430: Bracket 500: Spring
510: inlet bar 520: clip portion
522: first extension bar 524: second extension bar
526: protruding chin

Claims (6)

delete A pipe-shaped housing having an exhaust gas flow path therein;
A rotating shaft coupled to penetrate the housing in a direction across the exhaust gas flow path;
A gate coupled to a rotating shaft inside the housing to open and close the exhaust gas channel as the rotating shaft rotates;
An actuator in which a driving shaft is located at a position spaced apart from one longitudinal end of the rotating shaft; And
A spring which is wound in a coil-like shape and whose both sides in the longitudinal direction are coupled to the rotating shaft and the driving shaft, and transmits the rotating force of the driving shaft to the rotating shaft;
/ RTI >
A pair of fastening slits having a depth in a direction toward the center of the head portion and a length in a direction perpendicular to the longitudinal direction of the rotary shaft are formed on both sides of the head portion at one end in the longitudinal direction of the rotary shaft ,
A clip portion having a first extension bar and a second extension bar inserted into the pair of fastening slits in a sliding manner along a longitudinal direction of the fastening slit,
Wherein the drive shaft is arranged in line with the rotation shaft, and a seating groove having a length in the radial direction is formed at an end toward the rotation shaft,
And an inlet bar extending into the seating groove is formed on the other longitudinal side of the spring. The method of claim 2,
Wherein the first extension bar and the second extension bar are arranged in parallel so as to be spaced apart from each other by a distance between the pair of fastening slits,
And a protruding protrusion protruding toward the second extending bar is formed at an end of the first extending bar. The method of claim 3,
Wherein the protruding jaw is located at a point past the fastening slit when the first extension bar and the second extension bar are inserted into the pair of fastening slits as much as possible. delete The method of claim 2,
Wherein the inlet bar is arranged parallel to the first extension bar and the second extension bar.

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