JP3701297B1 - Exhaust control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust control valve having a novel structure capable of collecting a mechanism for adjusting exhaust sound in a compact manner.
Rotation by an axial force acting mechanism for causing an axial force to act on a rotation shaft in a direction in which a rotation shaft side contact portion is pressed against a passage wall side contact portion. The axial force exerted by the axial force acting mechanism 52 is maintained while the valve body 22 is held at a predetermined rotation position by utilizing the pressing state of the shaft side contact portion 28 to the passage wall side contact portion 36. A rotation position setting holding mechanism that allows the rotation position of the valve main body 20 to be changed by releasing is adopted.
[Selection] Figure 2

Description

  The present invention relates to an exhaust control valve disposed on an exhaust passage through which exhaust gas passes, and more particularly to an exhaust control valve that adjusts the volume when exhaust gas discharged from an internal combustion engine for a vehicle is released into the atmosphere. It is about.

  As is well known, in motorcycles and automobiles that are powered by an internal combustion engine, exhaust gas is discharged from each cylinder constituting the internal combustion engine when the power is obtained. The exhaust gas is collected by an exhaust manifold and then released into the atmosphere through an exhaust pipe.

  Since exhaust gas discharged from the internal combustion engine has high sound and high pressure, when such exhaust gas is released into the atmosphere as it is, the exhaust gas rapidly expands and emits severe explosion sound. Therefore, in general, a muffler is provided on the exhaust pipe, and the exhaust gas is released into the atmosphere after the pressure and temperature are lowered through the muffler, thereby releasing the exhaust gas into the atmosphere. The sound (exhaust sound) when turning is reduced.

  However, even if exhaust gas is released through the muffler, it is difficult to completely eliminate the exhaust noise, and depending on the time zone and place where the motorcycle or automobile is operated, such exhaust noise is felt as a loud sound, The driver may be concerned about the surroundings. Specifically, for example, when driving a motorcycle or an automobile in a residential area in the early morning or late at night, exhaust noise tends to be a problem.

  Thus, an engine exhaust sound variable structure as described in Patent Document 1 has been proposed. The engine exhaust sound variable structure includes an end cap that is attached so as to cover a tail end of a muffle body or a tail pipe, and an air opening is formed in the end cap. A support shaft is fixed to the end cap on the side opposite to the side where the air opening is formed, and a pair of blade valves are rotatably supported on the support shaft. In addition, the end cap has a central shaft support portion with a threaded portion formed at one end in the axial direction and an adjustment shaft formed with a knob for operation at the other end in the axial direction. It is attached freely. In addition, a moving piece is screwed to the adjustment shaft at a screw portion, and the moving piece is connected to a pair of blade valves by a link. In such an engine exhaust sound variable structure, when the operation knob is operated, the adjustment shaft is rotated, and the moving piece is moved in the axial direction of the adjustment shaft. The pair of blade valves are tilted rearward about the support shaft, so that the passage area of the exhaust gas passage formed between the atmosphere opening port and the pair of blade valves is changed. As a result, the exhaust noise is adjusted.

  However, in the engine exhaust sound variable structure described in Patent Document 1, since a link mechanism is used to drive a pair of blade valves, the mechanism for driving the pair of blade valves is complicated. In addition, there is a problem that a drive space for the link mechanism must be secured. Further, since the link mechanism is placed in an environment exposed to the exhaust gas, the members constituting the link mechanism are corroded by the exhaust gas, and the drive of the pair of blade valves and the adjustment of the exhaust sound are controlled. There is also a risk of adverse effects.

  An exhaust gas control valve as described in Patent Document 2 has also been proposed. In this exhaust gas control valve, a butterfly valve is fixed by a set screw to a rotating shaft that is inserted and arranged at a position passing through the center of the cross section of the exhaust pipe, and protrudes outward from the exhaust pipe on the rotating shaft. A traction plate and a spring receiver are disposed on the portion. In addition, a coil spring is provided between the traction plate and the spring receiver arranged in this way to apply a biasing force in a direction in which the opening degree of the butterfly valve is fully closed with respect to the rotation shaft. Furthermore, a protrusion is fixed to the traction plate, and a wire is connected to the protrusion. In the exhaust gas control valve having such a structure, the wire is pulled by the actuator, so that the traction plate is rotated against the urging force of the coil spring, thereby rotating the traction plate. The shaft is rotated so that the opening degree of the butterfly valve fixed to the rotation shaft is adjusted. As a result, the exhaust noise is adjusted.

  However, in such an exhaust gas control valve, adjustment of the opening degree of the butterfly valve is performed by pulling the wire by the actuator, so that it is necessary to handle the wire, and accordingly, a space for wiring the wire is required. There is a problem that it must be secured largely. Moreover, since the wire is pulled by the actuator, there is a problem that the number of parts increases. Furthermore, the wire may be extended due to heat from the exhaust pipe or the like, which may cause a problem that the opening degree of the butterfly valve is different even though the length of pulling the wire is the same. There is also.

JP 2003-56340 A Japanese Utility Model Publication No. 6-80837

  Here, the present invention has been made in the background as described above, and the problem to be solved is an exhaust gas having a novel structure that can compactly combine the mechanisms for adjusting the exhaust noise. It is to provide a control valve.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. Further, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification, or invention ideas that can be understood by those skilled in the art from these descriptions. It should be understood that this is recognized on the basis of

A first aspect of the present invention relating to an exhaust control valve is: (a) a passage of the exhaust passage which is disposed on an exhaust passage through which exhaust gas discharged from an internal combustion engine passes and is disposed on the exhaust passage; A rotation shaft extending in a direction substantially orthogonal to the direction, and is capable of relative displacement in the axial direction of the rotation shaft with respect to the passage wall of the exhaust passage. A valve main body that changes the passage cross-sectional area of the exhaust passage by being rotated in the circumferential direction, and (b) formed at a position corresponding to the rotation shaft of the valve main body and the passage wall of the exhaust passage. A rotation shaft side contact portion and a passage wall side contact portion that are brought into contact with each other by displacement of the rotation shaft in one axial direction, and (c) the rotation shaft side contact portion is connected to the passage wall. Axial force for applying an axial force to the rotating shaft with respect to the direction of pressing against the side contact portion And (d) holding the valve body at a predetermined rotation position by using a state in which the rotation shaft side contact portion is pressed against the passage wall side contact portion by the axial force acting mechanism. On the other hand, (e) an exhaust provided with a rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the axial force acting mechanism. (F) The control valve can be engaged and disengaged in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion, and is circumferentially engaged by engagement. An engagement mechanism for preventing the relative rotation of the valve body, and by allowing the engagement mechanism to be engaged at a plurality of positions in the circumferential direction of the rotation shaft. Enable to set, engage the engagement mechanism by pressing the rotating shaft side contact part against the passage wall side contact part By holding the valve body in a predetermined rotation position, the pressing of the rotation shaft side contact portion to the passage wall side contact portion is released, and the engagement mechanism is brought into a disengaged state. The rotation position of the valve body can be changed to constitute the rotation position setting and holding mechanism, and (g) the rotation shaft side contact portion and the passage wall side contact portion include An axial force is exerted by the axial force acting mechanism so as to be inserted and removed in the axial direction. Stop teeth are formed, and the engagement mechanism is constituted by the locking teeth perpendicular to the axis .

  In the exhaust control valve having the structure according to this aspect, the exhaust gas discharged from the internal combustion engine is disposed on the exhaust passage through which the exhaust gas passes, and the exhaust passage in the state of being disposed on the exhaust passage is arranged in the passage direction of the exhaust passage. The valve body having a rotation shaft extending in a direction substantially perpendicular to the exhaust passage can be relatively displaced in the axial direction of the rotation shaft with respect to the passage wall of the exhaust passage while being arranged on the exhaust passage. And a rotation shaft side contact portion and a passage wall which are brought into contact with each other by displacement of the rotation shaft in one axial direction with respect to corresponding positions of the rotation shaft of the valve body and the passage wall of the exhaust passage. A side abutting portion is formed, and an axial force action for applying an axial force to the rotating shaft with respect to the direction in which the rotating shaft side abutting portion is pressed against the passage wall side abutting portion. Using the pressing state of the rotating shaft side contact part to the passage wall side contact part by the mechanism While the valve body is held at a predetermined rotation position, a rotation position setting holding mechanism is adopted that enables the rotation position of the valve body to be changed by releasing the force exerted by the axial force acting mechanism. Therefore, the passage cross-sectional area of the exhaust passage can be changed by changing the rotation position of the valve body in a state where the rotation position of the valve body can be changed by the rotation position setting holding mechanism. In addition, the valve body is held by the rotation position setting and holding mechanism with respect to the rotation position thus changed, so that the state in which the cross-sectional area of the exhaust passage is changed is maintained. It has come to be. As a result, the exhaust noise is adjusted.

  Therefore, in the exhaust control valve according to this aspect, the state in which the rotation position of the valve body can be changed is manifested by releasing the force exerted on the rotation shaft by the axial force acting mechanism. In addition, the valve body is held at a predetermined rotational position by applying a force to the rotational shaft by an axial force acting mechanism, and these Since the rotation shaft side contact portion and the passage wall side contact portion are configured to contact each other in the axial direction of the rotation shaft, the rotation position setting holding mechanism and the axial force action mechanism are connected to the valve. It can be provided on the same central axis as the rotation axis of the main body.

  In particular, in the exhaust control valve according to this aspect, the rotation shaft side contact portion is formed with respect to the rotation shaft, and the passage wall side contact portion is formed on the passage wall of the exhaust passage, In addition, since the valve main body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion against the passage wall side contact portion, the valve main body is predetermined. It is possible to reduce the number of parts required for holding the rotating position.

  In addition, in the exhaust control valve according to this aspect, the rotation shaft side contact portion is pressed against the passage wall side contact portion, so that the rotation is performed at a position close to the passage wall of the exhaust passage. A position setting holding mechanism can be provided.

  Therefore, in the exhaust control valve according to this aspect, the axial force acting mechanism and the rotational position setting and holding mechanism, that is, the mechanism for adjusting the exhaust noise can be compactly integrated.

  Further, in the exhaust control valve according to this aspect, in a state where the valve main body is disposed on the exhaust passage, the rotation shaft provided in the valve main body extends in a direction substantially orthogonal to the passage direction of the exhaust passage. Therefore, the direction of the force exerted on the rotation shaft to hold the valve body at a predetermined rotation position is substantially perpendicular to the rotation direction of the valve body, thereby, for example, Even if the exhaust gas pressure increases due to high-speed traveling, etc., the exhaust gas pressure is exerted on the valve main body, so that the valve main body is exerted on the rotational shaft, and the valve main body is held at a predetermined rotational position. Therefore, it is possible to make it difficult for the axial force to be released to be released, and as a result, it is possible to stably hold the valve body at a predetermined rotational position.

  The valve body in this aspect is not particularly limited as long as the projection area can be changed in the projection in the passage direction when rotated in the circumferential direction of the rotation shaft. For example, it is advantageously configured by a butterfly valve or the like. In addition, it is desirable that a predetermined gap be formed between the valve main body and the exhaust passage in the fully closed state where the projected area in the passage direction is the largest, Due to the thermal expansion of the passage wall of the exhaust passage, the rotational position of the valve body is set to a rotational position different from the rotational position where the valve body is fully closed from the rotational position where the valve body is fully closed. Thus, it is possible not to be inhibited. Therefore, in the valve body in this aspect, the gap formed between the passage wall of the exhaust passage rotates more than the direction in which the rotation shaft side contact portion is pressed against the passage wall side contact portion. It is desirable that the shaft-side contact portion is set to be large in the direction of releasing the force exerted in the direction in which the shaft-side contact portion is pressed against the passage wall-side contact portion. It is possible to easily release the force exerted in the direction in which the valve body is pressed and to change the rotation position of the valve body.

Further, in the exhaust control valve having the structure according to this aspect, it is provided between the rotating shaft side abutting portion and the passage wall side abutting portion so as to be detachable in the axial direction of the rotating shaft. When the engagement mechanism that prevents relative rotation in the direction is engaged, the valve body is held at a predetermined rotation position, while when the engagement mechanism is released, the rotation of the valve body is performed. Since the moving position can be changed, such an engagement mechanism can be provided on the same central axis as the rotation axis. In addition, the engagement state of the engagement mechanism can be made at a position close to the passage wall of the exhaust passage.

  Therefore, in the exhaust control valve according to the present aspect, the rotation position setting and holding mechanism can be made a simple structure, and thereby a mechanism that enables adjustment of the exhaust sound, that is, an axial force acting mechanism and The rotational position setting and holding mechanism can be made compact.

  In addition, in the exhaust control valve according to this aspect, unless the engagement state in the engagement mechanism is released, the valve body is continuously held at the predetermined rotation position. Therefore, it is possible to advantageously realize the control of the exhaust sound by the simple structure.

Further, in the exhaust control valve having the structure according to this aspect, it is possible to advantageously realize the rotation position setting and holding mechanism with a simple structure, thereby enabling the adjustment of the exhaust sound. That is, the axial force acting mechanism and the rotational position setting and holding mechanism can be combined in a compact manner.

A second aspect of the present invention relating to an exhaust control valve is: (a) an exhaust passage that is disposed on an exhaust passage through which exhaust gas discharged from an internal combustion engine passes and is disposed on the exhaust passage; A rotation shaft extending in a direction substantially orthogonal to the direction, and is capable of relative displacement in the axial direction of the rotation shaft with respect to the passage wall of the exhaust passage. A valve main body that changes the passage cross-sectional area of the exhaust passage by being rotated in the circumferential direction, and (b) formed at a position corresponding to the rotation shaft of the valve main body and the passage wall of the exhaust passage. A rotation shaft side contact portion and a passage wall side contact portion that are brought into contact with each other by displacement of the rotation shaft in one axial direction, and (c) the rotation shaft side contact portion is connected to the passage wall. Axial force for applying an axial force to the rotating shaft with respect to the direction of pressing against the side contact portion And (d) holding the valve body in a predetermined rotation position by using the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force operation mechanism. On the other hand, (e) an exhaust provided with a rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the axial force acting mechanism. (F) The control valve can be engaged and disengaged in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion, and is circumferentially engaged by engagement. An engagement mechanism for preventing the relative rotation of the valve body, and by allowing the engagement mechanism to be engaged at a plurality of positions in the circumferential direction of the rotation shaft. Enable to set, engage the engagement mechanism by pressing the rotating shaft side contact part against the passage wall side contact part By holding the valve body in a predetermined rotation position, the pressing of the rotation shaft side contact portion to the passage wall side contact portion is released, and the engagement mechanism is brought into a disengaged state. The rotation position setting and holding mechanism is configured by making it possible to change the rotation position of the valve body, and (g) any one of the rotation shaft side contact portion and the passage wall side contact portion On one side, the locking shaft projects in the axial direction of the rotary shaft from a surface opposed to the other of the rotary shaft side contact portion and the passage wall side contact portion in the axial direction of the rotary shaft. A protrusion is formed, and the other of the rotation shaft side contact portion and the passage wall side contact portion is provided on the other side of the rotation shaft side contact portion and the passage wall side in the axial direction of the rotation shaft. A locking recess is formed in the surface facing the one of the abutting portions, and the locking projection is fitted into the locking recess. Said engagement mechanism is constituted by the locking recesses, characterized. In the exhaust control valve having the structure according to this aspect, it is possible to advantageously realize the rotational position setting and holding mechanism with a simple structure, and thereby a mechanism that enables adjustment of the exhaust sound, that is, Thus, the axial force acting mechanism and the rotation position setting holding mechanism can be combined in a compact manner.

A third aspect of the present invention relating to an exhaust control valve is as follows: (a) the exhaust passage is disposed on the exhaust passage through which the exhaust gas discharged from the internal combustion engine passes, and is disposed on the exhaust passage; A rotation shaft extending in a direction substantially orthogonal to the direction, and is capable of relative displacement in the axial direction of the rotation shaft with respect to the passage wall of the exhaust passage. A valve main body that changes the passage cross-sectional area of the exhaust passage by being rotated in the circumferential direction, and (b) formed at a position corresponding to the rotation shaft of the valve main body and the passage wall of the exhaust passage. A rotation shaft side contact portion and a passage wall side contact portion that are brought into contact with each other by displacement of the rotation shaft in one axial direction, and (c) the rotation shaft side contact portion is connected to the passage wall. Axial force for applying an axial force to the rotating shaft with respect to the direction of pressing against the side contact portion And (d) holding the valve body in a predetermined rotation position by using the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force operation mechanism. On the other hand, (e) an exhaust provided with a rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the axial force acting mechanism. (F) The control valve can be engaged and disengaged in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion, and is circumferentially engaged by engagement. An engagement mechanism for preventing the relative rotation of the valve body, and by allowing the engagement mechanism to be engaged at a plurality of positions in the circumferential direction of the rotation shaft. Enable to set, and engage the engagement mechanism by pressing the rotation shaft side contact portion against the passage wall side contact portion By holding the valve body in a predetermined rotation position, the pressing of the rotation shaft side contact portion to the passage wall side contact portion is released, and the engagement mechanism is brought into a disengaged state. The rotation position setting and holding mechanism is configured by making it possible to change the rotation position of the valve body, and (h) any one of the rotation shaft side contact portion and the passage wall side contact portion On the other hand, when an axial force is exerted by the axial force acting mechanism, the rotation shaft side contact portion and the passage wall side contact portion are opposite to each other in the direction perpendicular to the rotation shaft. Protrusions in the direction perpendicular to the axis projecting in the direction perpendicular to the axis of the pivot shaft are formed from the opposed surfaces, and the other of the pivot shaft side abutting portion and the passage wall side abutting portion is provided on the other side. When an axial force is exerted by the axial end surface of the moving shaft and the axial force acting mechanism, A notch is formed which opens on both of the dynamic shaft side contact portion and the surface facing the one of the passage wall side contact portion and allows the protrusion in the direction perpendicular to the shaft to be engaged in the axial direction of the rotating shaft. The engagement mechanism is constituted by the protrusion perpendicular to the axis and the notch. In the exhaust control valve constructed according to this mode, it is possible to advantageously realize a rotational position setting holding mechanism with a simple structure, thereby mechanism that allows adjustment of the exhaust sound, i.e. Thus, the axial force acting mechanism and the rotation position setting holding mechanism can be combined in a compact manner.

The fourth aspect of the present invention relating to the exhaust control valve is that: (a) a passage of the exhaust passage is disposed on the exhaust passage through which the exhaust gas discharged from the internal combustion engine passes and is disposed on the exhaust passage; A rotation shaft extending in a direction substantially orthogonal to the direction, and is capable of relative displacement in the axial direction of the rotation shaft with respect to the passage wall of the exhaust passage. A valve main body that changes the passage cross-sectional area of the exhaust passage by being rotated in the circumferential direction, and (b) formed at a position corresponding to the rotation shaft of the valve main body and the passage wall of the exhaust passage. A rotation shaft side contact portion and a passage wall side contact portion that are brought into contact with each other by displacement of the rotation shaft in one axial direction, and (c) the rotation shaft side contact portion is connected to the passage wall. Axial force for applying an axial force to the rotating shaft with respect to the direction of pressing against the side contact portion And (d) holding the valve body in a predetermined rotation position by using the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force operation mechanism. On the other hand, (e) an exhaust provided with a rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the axial force acting mechanism. And (i) the exhaust control valve according to the first aspect, wherein the rotary shaft side contact portion is pressed against the passage wall side contact portion of the rotary shaft side contact portion. The valve body is held at a predetermined rotation position by using a static frictional force acting on the contact surface between the contact portion and the passage wall side contact portion, while the rotation shaft side contact portion on the passage wall side Static frictional force acting between the rotating shaft side abutting portion and the passage wall side abutting portion after releasing the pressing force state on the abutting portion Weakened by being configured the rotational position setting holding mechanism allowing to change the rotational position of the valve body, characterized. In the exhaust control valve having such a structure according to this aspect, when an external force is applied to the valve body in the rotational direction while the rotational shaft side contact portion is pressed against the passage wall side contact portion. On the other hand, the valve body is held at a predetermined rotation position by using a static frictional force acting between the rotation side contact portion and the passage wall side contact portion, while the rotation shaft side contact portion The pressing position of the valve body on the abutting portion on the passage wall side is released, and the rotating frictional force acting between the rotating shaft side abutting portion and the abutting portion on the passage wall side is weakened, thereby changing the pivot position of the valve body. Since it is possible, the axial force acting mechanism and the rotation position setting holding mechanism can be provided on the same central axis as the rotation axis. Further, the pressing state of the rotating shaft side contact portion against the passage wall side contact portion can be performed at a position close to the passage wall of the exhaust passage.

  Therefore, in the exhaust control valve according to this aspect, the rotation position setting and holding mechanism can be advantageously realized with a simple structure, and thereby a mechanism that enables adjustment of the exhaust noise, that is, the axial force. It is possible to combine the action mechanism and the rotation position setting holding mechanism in a compact manner.

According to a fifth aspect of the present invention relating to the exhaust control valve, in the exhaust control valve according to any one of the first to fourth aspects, the axial direction of the rotational shaft of the valve body is on the rotational shaft side. A compression coil spring is provided that exerts an urging force in a direction in which the contact portion is pressed against the passage wall side contact portion, and the rotating shaft side contact portion is pressed against the passage wall side contact portion by the compression coil spring. Thus, the axial force acting mechanism is configured. In the exhaust control valve having the structure according to this aspect, the number of parts required for the axial force acting mechanism can be reduced. It is also possible to provide the compression coil spring on the same central axis as the rotation axis.

  Therefore, in the exhaust control valve according to this aspect, the mechanism that enables adjustment of the exhaust sound, that is, the axial force action mechanism and the rotational position setting holding mechanism can be more compactly integrated.

According to a sixth aspect of the present invention relating to the exhaust control valve, in the exhaust control valve according to any one of the first to fifth aspects, a thread is formed on an outer peripheral surface of the rotating shaft in the valve body. While providing a bolt part on the rotating shaft, a nut that is screwed to the bolt part is provided, and the nut screwed to the bolt part is rotated to relatively drive the bolt part in the axial direction. The valve body having the pivot shaft on which the bolt portion is formed is displaced relative to the passage wall of the exhaust passage, and the pivot shaft side contact portion is moved to the passage wall side contact portion. It is characterized in that the axial force acting mechanism is configured by being pressed against. In the exhaust control valve having such a structure according to this aspect, one of the parts necessary to constitute the axial force acting mechanism is constituted by the rotating shaft, thereby the axial force acting mechanism. It is possible to reduce the number of parts required for constituting the.

  Therefore, in the exhaust control valve according to this aspect, the mechanism that enables adjustment of the exhaust sound, that is, the axial force action mechanism and the rotational position setting holding mechanism can be more compactly integrated.

According to a seventh aspect of the present invention relating to the exhaust control valve, in the exhaust control valve according to any one of the first to sixth aspects, an insertion hole extending in a direction perpendicular to the rotation axis of the valve body is provided. Forming a rod to be inserted into the insertion hole, and inserting the rod into the insertion hole in a state where the rotation shaft side contact portion is pressed against the passage wall side contact portion. The axial force acting mechanism is configured by maintaining the pressing state of the side contact portion against the passage wall side contact portion. In the exhaust control valve having such a structure according to this aspect, one of the parts necessary for constituting the axial force acting mechanism is constituted by the rotating shaft, thereby the axial force acting mechanism. It is possible to reduce the number of parts required for the process.

  Therefore, in the exhaust control valve according to this aspect, the mechanism that enables adjustment of the exhaust sound, that is, the axial force action mechanism and the rotational position setting holding mechanism can be more compactly integrated.

  As is apparent from the above description, in the exhaust control valve having the structure according to the present invention, the axial direction of the rotary shaft is smaller than the direction of pressing the rotary shaft side contact portion against the passage wall side contact portion. While the valve body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion to the passage wall side contact portion by the axial force operation mechanism that applies force, the axial force operation is performed. Since the rotation position setting holding mechanism that allows the rotation position of the valve body to be changed by releasing the force exerted by the mechanism is adopted, the rotation position setting holding mechanism can The rotation position of the valve body is changed in a state where the change is enabled, and the valve body is held by the rotation position setting holding mechanism with respect to the rotation position thus changed, so that the exhaust passage The passage cross-sectional area of It is because, so that the exhaust sound is adjusted. Therefore, in the exhaust control valve having a structure according to the present invention, the axial force acting mechanism exerts a force in the axial direction on the rotation shaft provided in the valve body, so that the rotation of the valve body is performed. The valve body is held in a predetermined rotation position by pressing the rotation shaft side contact portion formed on the shaft against the passage wall side contact portion formed on the passage wall of the exhaust passage. Thus, the axial force acting mechanism and the rotation position setting holding mechanism can be provided on the same central axis of the rotation axis provided in the valve body and at a position close to the passage wall of the exhaust passage. As a result, a mechanism that enables adjustment of exhaust noise, that is, an axial force acting mechanism and a rotational position setting and holding mechanism can be compactly combined.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 schematically shows an exhaust pipe 12 for a motorcycle equipped with an exhaust control valve 10 as a reference embodiment of the present invention, and FIGS. An enlarged cross-sectional view is shown.

  The exhaust pipe 12 is made of stainless steel and has a cylindrical shape as a whole. The exhaust pipe 12 has one axial end connected to an engine 14 as an internal combustion engine and the other axial end connected to a muffler 16. The exhaust gas discharged from the engine 14 passes through an exhaust passage 18 formed in the exhaust pipe 12, and after being reduced in pressure and temperature by the muffler 16, is discharged into the atmosphere. As is clear from this, in this embodiment, the exhaust pipe 12 constitutes a passage wall of the exhaust passage 18.

  The exhaust control valve 10 is provided in the exhaust pipe 12 in the vicinity of a connection portion with the muffler 16 and includes a valve main body 20 disposed on an exhaust passage 18 formed in the exhaust pipe 12. . The valve body 20 has a structure in which a support rod 24 as a rotation shaft is fixed to a rotating plate 22 by welding. In the present embodiment, both the rotating plate 22 and the support rod 24 are made of stainless steel.

  Therefore, in this embodiment, as shown in FIGS. 4 and 5, the rotating plate 22 has a disk shape having an outer diameter smaller than the inner diameter of the exhaust pipe 12 as a whole. However, the outer diameter of one side of the support rod 24 in the axial direction (right side in FIGS. 2 and 4) is larger than the outer diameter of the other side of the support rod 24 in the axial direction (left side in FIGS. 2 and 4). As a result, the rotating plate 22 of the present embodiment seems to be compressed on the other side in the axial direction of the support rod 24 from the other side in the axial direction of the support rod 24 toward one side. It is a simple shape.

  On the other hand, the support rod 24 has a substantially constant circular cross section and has a shape extending straight in the axial direction. In particular, in this embodiment, the axial dimension is sufficiently larger than the outer diameter dimension of the exhaust pipe 12. Then, in a state where the support rod 24 is inserted through the insertion hole 26 formed in the exhaust pipe 12, the rotary plate 22 is fixed to the axial central portion of the support rod 24 by welding, so that the valve body 20 is arranged on the exhaust passage 18. That is, both end portions of the support rod 24 as a rotation shaft are inserted into insertion holes 26 and 26 formed in portions opposed to the exhaust pipe 12 in the radial direction, whereby the support rod 24 is connected to the exhaust pipe. 12 is supported by the exhaust pipe 12 so as to be rotatable around the central axis and not to be displaced in a direction perpendicular to the axis.

  Therefore, in the present embodiment, in a state where the valve body 20 is disposed on the exhaust passage 18, the support rod 24 provided in the valve body 20 extends in a direction substantially orthogonal to the passage direction of the exhaust passage 18. . Further, only the portion where the support rod 24 is superimposed on the rotating plate 22 is curved along the outer peripheral surface of the supporting rod 24, whereby the rotating plate 22 fixed to the supporting rod 24 is The flat portion protrudes outward in the direction perpendicular to the axis of the support rod 24. Furthermore, a gap is formed between the inner peripheral surface of the insertion hole 26 and the outer peripheral surface of the support rod 24 so that the rotation of the valve body 20 is not hindered when the exhaust pipe 12 is thermally expanded. If the gap is too large, the exhaust gas may leak, and the size of the gap is set in consideration of these circumstances.

  In this manner, the valve body 20 disposed on the exhaust passage 18 is fixedly provided with a support rod side contact member 28 at the other end in the axial direction of the support rod 24. The support rod side abutting member 28 is made of stainless steel and has a thick circular block shape as a whole as shown in FIG. Further, the support rod side contact member 28 is formed with a shallow recess 30 so as to open to one end surface in the thickness direction, and at the opening end surface of the shallow recess 30. A plurality of serrated locking teeth 32 are formed. The locking teeth 32 are constituted by a plurality of crests and troughs continuously formed in the circumferential direction around the central axis of the support rod side contact member 28, and the inclination angles of the crests and troughs. Are equal. In short, the ridge lines and valley lines of the plurality of locking teeth 32 are equally spaced in the circumferential direction and extend radially from the central axis of the support rod side contact member 28. The support rod side contact member 28 has a mark hole 33 extending in a radial direction with a circular cross section having an appropriate inner diameter so that the rotation position of the valve body can be recognized from the outside of the exhaust pipe 12. And is opened in the outer peripheral surface. Note that a pin can be press-fitted into the mark hole 33 to form a protruding mark.

  The support rod side contact member 28 having such a structure has the other end in the axial direction of the support rod 24 with respect to the accommodation hole 34 formed so as to open to the bottom surface of the shallow recess 30. Is fixedly fitted to the other end of the support rod 24 in the axial direction. In the present embodiment, in the state where the support rod side contact member 28 is fixed to the other end portion in the axial direction of the support rod 24 as described above, the opening direction of the mark hole 33 is the rotation plate 22. It is set to be approximately the same as the spreading direction.

  Therefore, in the present embodiment, the support rod side contact member 28 is positioned on the same central axis as the support rod 24 in a state where the support rod side contact member 28 is fixedly provided at the other end in the axial direction of the support rod 24. In addition, the opening end surface of the shallow recess 30 formed in the support rod side contact member 28 is positioned on the exhaust pipe 12 side.

  Further, as described above, the exhaust pipe 12 is disposed on the outer peripheral surface of the exhaust pipe 12 at a position facing the support rod side abutting member 28 fixedly provided at the other end in the axial direction of the support rod 24. A side contact member 36 is fixedly provided. The exhaust pipe side abutting member 36 is made of stainless steel, and has a circular block shape as a whole as shown in FIG. Here, one end surface in the thickness direction of the exhaust pipe side contact member 36 is curved in an arc shape along the outer peripheral surface of the exhaust pipe.

  Then, the exhaust pipe side contact member in a state in which one surface in the thickness direction curved in an arc shape along the outer peripheral surface of the exhaust pipe 12 is overlapped with the outer peripheral surface of the exhaust pipe 12. 36 is fixed to the outer peripheral surface of the exhaust pipe 12 by welding. The exhaust pipe side contact member 36 is formed with an insertion hole 38 penetrating in the thickness direction, and the exhaust pipe side contact member is inserted in a state where the support rod 24 is inserted into the insertion hole 38. 36 is fixed to the outer peripheral surface of the exhaust pipe 12 by welding.

  Therefore, in the present embodiment, the exhaust pipe side contact member 36 is on the same central axis as the support rod 24 in a state where the exhaust pipe side contact member 36 is fixed to the outer peripheral surface of the exhaust pipe 12 in this way. It is located in. In addition, a predetermined gap is formed between the outer peripheral surface of the support rod 24 and the inner peripheral surface of the insertion hole 38, whereby the valve body 20 when the exhaust pipe side contact member 36 is thermally expanded. The rotation is not hindered.

  Further, the exhaust pipe side contact member 36 is formed with a shallow recess 40 so as to open to the other surface in the thickness direction, and at the opening end surface of the shallow recess 40. A plurality of serrated locking teeth 42 that are engaged with the locking teeth 32 formed on the support rod side contact member 28 in the axial direction of the support rod 24 are formed. That is, like the locking teeth 32 of the support rod side contact member 28, the locking teeth 42 are also a plurality of peaks formed continuously in the circumferential direction around the central axis of the exhaust pipe side contact member 36. , And has a size and shape corresponding to the locking teeth 32. Thereby, the support rod side contact member 28 and the exhaust pipe side contact member 36 are formed on both opposing surfaces in the axial direction, and the engagement of the locking teeth 32 and 42 is expressed at a plurality of positions around the central axis. It is like that. In addition, since all the locking teeth formed on the circumference are always meshed, a very large circumferential positioning force can be exerted as a whole.

  Further, in the present embodiment, an annular seal member 46 is superimposed on the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36 in a state where the seal rod 46 is inserted through the support rod 24 in the center hole thereof. It has been. The seal member 46 is disposed to block a gap formed between the inner peripheral surface of the insertion hole 38 and the outer peripheral surface of the support rod 24 from the outside, and is formed of silicone resin, fluorine resin, or the like. Yes. Furthermore, in this embodiment, the coil spring 44 is interposed between the bottom surface of the recess 30 formed in the support rod side contact member 28 and the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36. Is arranged so that an urging force is always exerted in the direction in which the support rod side contact member 28 and the exhaust pipe side contact member 36 are separated in the axial direction. As a result, the seal member 46 is brought into close contact with the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36 by the urging force of the coil spring 44, and as a result, sealing performance is ensured. It has become.

  Furthermore, an annular plate-shaped contact plate 48 is fixed to one end of the support rod 24 in the axial direction by welding while being inserted into the support rod 24 in the center hole. In this embodiment, the thickness of the contact plate 48 fixed to one end of the support rod 24 in the axial direction and the one end surface of the support rod 24 in the axial direction are overlapped. In this way, the circular block-shaped operation member 50 is fixed by bonding or the like. The operation member 50 is made of a heat-resistant rubber material.

  Further, the compression coil spring 52 is compressed in the axial direction between the exhaust pipe 12 and the contact plate 48 fixed to one end portion in the axial direction of the support rod 24 in this manner, so that the support rod 24. So that the urging force of the compression coil spring 52 is in the axial direction of the support rod 24 with respect to the valve body 20 (support rod 24), and the support rod side contact with the valve body 20 (support rod 24). The contact member 28 is always extended in the direction in which the contact member 28 approaches the exhaust pipe side contact member 36.

  And, in this way, in the axial direction of the support rod 24 with respect to the valve body 20 (support rod 24) and in the direction in which the support rod side contact member 28 approaches the exhaust pipe side contact member 36, always, When the biasing force of the compression coil spring 52 is exerted, the support rod side contact member 28 is pressed against the exhaust pipe side contact member 36 to be in a pressed state, thereby forming the support rod side contact member 28. The engaging teeth 32 are meshed with the engaging teeth 32 formed on the exhaust pipe side contact member 36 in the axial direction of the support rod 24 and on the same central axis as the support rod 24. It is like that. Thereby, the rotation position of the valve body 20 is set, and the valve body 20 is held with respect to the rotation position set in this way. As a result, the exhaust noise is adjusted. In the present embodiment, the urging force of the coil spring 44 is constantly exerted in the direction in which the support rod side contact member 28 and the exhaust pipe side contact member 36 are separated from each other. Since the urging force is sufficiently smaller than the urging force of the compression coil spring 52, it is formed on the locking tooth 32 formed on the support rod side contact member 28 and the exhaust pipe side contact member 36. In addition, the engagement state of the locking teeth 42 can be advantageously ensured.

  Therefore, in the present embodiment, the other axial side of the support rod 24 in the rotating plate 22 is compressed from the other axial side of the support rod 24 to one side. As described above, in a state in which the locking teeth 32 formed on the support rod side contact member 28 and the locking teeth 42 formed on the exhaust pipe side contact member 36 are meshed, A gap formed between the other side in the axial direction and the exhaust pipe 12 is made larger than a gap formed between one side in the axial direction of the support rod 24 of the rotating plate 22 and the exhaust pipe 12. Thus, even when the valve body 20 is displaced in the direction in which the support rod side abutting member 28 is separated from the exhaust pipe side abutting member 36 against the urging force of the compression coil spring 52, the valve body 20 rotates. A sufficient amount of displacement of the valve body 20 until the plate 22 hits the exhaust pipe 12 can be secured. As a result, the locking teeth 32 formed on the support rod side contact member 28 and the exhaust pipe side contact member The valve body 20 can be displaced in the axial direction of the support rod 24 until the engagement state of the locking teeth 42 formed on 36 can be released.

  In the present embodiment, an annular seal member 54 is superposed on the outer peripheral surface of the exhaust pipe 12 in a state of being inserted through the support rod 24 in the center hole. The seal member 54 is arranged to cover a predetermined gap formed between the inner peripheral surface of the insertion hole 26 and the outer peripheral surface of the support rod 24 from the outside, and considers heat resistance and durability. Thus, it is preferably formed of a silicone resin, a fluorine resin, or the like. Since the seal member 54 is arranged so as to overlap the outer peripheral surface of the exhaust pipe 12 in this way, the urging force of the compression coil spring 52 (as a contact reaction force with respect to the support rod 24). The exhaust pipe 12 is applied to the exhaust pipe 12 via the seal member 54, thereby ensuring the sealing performance.

  Next, a method for setting the rotational position of the valve body 20 in the exhaust control valve 10 having such a structure, that is, a method for adjusting the exhaust sound will be described. First, an operator such as a user or a mechanic applies external force from the outside, and pushes the operation member 50 from one side in the axial direction of the support rod 24 toward the other side. As a result, the valve body 20 is displaced relative to the exhaust pipe 12 toward one side in the axial direction against the urging force of the compression coil spring, and the locking rod formed on the support rod side contact member 28. The engagement of the teeth 32 with the locking teeth 42 formed on the exhaust pipe side contact member 36 is released.

  Next, the engagement of the locking teeth 32 formed on the support rod side contact member 28 with the locking teeth 42 formed on the exhaust pipe side contact member 36 is based on the relative displacement in the axial direction. While maintaining the released state, that is, with the axial external force applied to the support rod 24, the valve body 20 is rotated to a desired rotation position.

  Thereafter, the pressing operation by the axial external force on the operation member 50 is stopped. As a result, the valve body 20 is displaced relative to the exhaust pipe 12 by the urging force of the compression coil spring 52, and the locking teeth 32 formed on the support rod side contact member 28 are moved to the exhaust pipe side contact member 36. Are engaged with the locking teeth 42 formed on the surface.

  As a result, the valve body 20 can be changed to a desired rotation position and held at this position, and as a result, the exhaust sound can be adjusted.

  As is clear from the above description, in this embodiment, the support rod side contact member 28 constitutes the rotating shaft side contact portion, and the exhaust pipe side contact member 36 contacts the passage wall side contact. The part is composed. In the present embodiment, the engagement mechanism is constituted by the engagement teeth 32 formed on the support rod side contact member 28 and the engagement teeth 42 formed on the exhaust pipe side contact member 36, and the support Each of the locking teeth 32 formed on the rod side contact member 28 and the locking teeth 42 formed on the exhaust pipe side contact member 36 constitutes an axial direction locking tooth. Furthermore, in this embodiment, the axial force is exerted on the support rod 24 by the urging force of the compression coil spring 52, and the support rod side contact member 28 is pressed against the exhaust pipe side contact member 36. A directional force acting mechanism is configured. Furthermore, in the present embodiment, the support rod side contact member 28 is pressed against the exhaust pipe side contact member 36 by the urging force of the compression coil spring 52, so that the locking teeth formed on the support rod side contact member 28 are formed. 32 and the engagement teeth 42 formed on the exhaust pipe side abutting member 36 are engaged with each other in the axial direction of the support rod 24 to hold the valve body 20 in a predetermined rotational position, while being attached by the compression coil spring 52. The valve body 20 is displaced relative to the exhaust pipe 12 against the force, and the locking teeth 32 formed on the support rod side contact member 28 are locked to the locking teeth 42 formed on the exhaust pipe side contact member 36. In contrast, the rotational position of the valve body 20 can be changed by separating the support rod 24 in the axial direction, thereby forming a rotational position setting and holding mechanism.

  In the exhaust control valve 10 having such a structure, the exhaust rod 12 is extrapolated between the abutment plate 48 fixedly provided at one end of the support rod 24 in the axial direction and the exhaust pipe 12. The valve body 20 is relatively displaced in the axial direction of the support rod 24 with respect to the exhaust pipe 12 by the urging force of the compression coil spring 52 arranged in the state, and thereby the locking formed on the support rod side contact member 28. The teeth 32 are engaged with the locking teeth 42 formed on the exhaust pipe side contact member 36 in the axial direction of the support rod 24 and on the same central axis as the support rod 24. As a result, the valve main body 20 is held at a predetermined rotational position so that the exhaust noise is adjusted, so that the members necessary for adjusting the exhaust noise are the same center as the support rod 24. In the above, so that the arranged summarized in the vicinity of the exhaust pipe 12. Therefore, in the exhaust control valve 10 of the present embodiment, the mechanism that enables adjustment of the exhaust sound, that is, the axial force action mechanism and the rotational position setting holding mechanism can be compactly integrated.

  Further, in the exhaust control valve 10 of the present embodiment, the compression coil spring 52 is extrapolated to the support rod 24 on the side opposite to the side on which the support rod side contact member 28 is fixed with the exhaust pipe 12 interposed therebetween. Therefore, it is possible to advantageously secure a space for arranging the compression coil spring 52.

  Furthermore, in the exhaust control valve 10 of the present embodiment, the rotational position of the valve main body 20 can be adjusted. Therefore, by adjusting the rotational position of the valve main body 20, it is only possible to adjust the exhaust sound. It is also possible to change the output characteristics of the engine 14. That is, by reducing the inclination angle of the valve body 20 (intersection angle of the surface of the valve body 20 with respect to the central axis of the exhaust pipe 12) and laying the valve body 20 in the exhaust pipe 12, the exhaust efficiency is improved and high-speed rotation is achieved. The engine can be extended in the engine range, or the valve body 20 can be stood in the exhaust pipe 12 by increasing the inclination angle of the valve body 20, thereby reducing the exhaust efficiency and providing a large torque characteristic in the low rotation range. Can also be expressed.

  Further, in the exhaust control valve 10 of the present embodiment, when the rotation position of the valve body 20 is changed, the valve body 20 is directly rotated without using a link mechanism or a wire as in the prior art. Therefore, the structure can be simplified and the number of parts can be reduced.

  Furthermore, even when the valve body 20 is held at the same rotational position for a long time and then the rotational position of the valve body 20 is changed, it is caused by a malfunction of the link mechanism or deterioration of the sliding property of the wire. Therefore, it is possible to advantageously avoid the occurrence of a problem that the valve body 20 cannot be set at a desired rotation position, and thereby the rotation position of the valve body 20 can be changed stably over a long period of time. It becomes possible.

  Further, in the exhaust control valve 10 of the present embodiment, the rotation position of the valve body 20 can be changed, that is, the exhaust sound can be adjusted more reliably than when operating with a wire or the like. Therefore, it is possible to increase the reliability for adjusting the exhaust sound.

  In particular, in the present embodiment, since the valve body 20 is held in the rotational position by the plurality of serrated locking teeth 32, 42 formed in the circumferential direction meshing with each other, a set of Compared to the case where the valve body 20 is held at the rotational position only by the engagement of the concave and convex portions, it is possible to advantageously secure a force for holding the valve body 20 at the rotational position, thereby reducing the exhaust pressure. As a result, it is possible to advantageously ensure the reliability of holding the rotational position of the valve body 20 and, consequently, the reliability of adjusting the exhaust sound.

  In addition, in the present embodiment, the engaging teeth 32 and 42 in which the upward inclination and the downward inclination are alternately repeated mesh with each other in the circumferential direction of the support rod 24, not the unevenness extending in the axial direction of the support rod 24. Therefore, it is possible to easily change the rotational position of the valve main body 20 by the guiding action using the inclined surfaces of the locking teeth 32 and 42, thereby changing the rotational position of the valve main body 20. Can be performed promptly. That is, it is guided using the biasing force of the compression coil spring toward the normal and most stable meshing state in which both the locking teeth 32 and 42 (the axially opposed surfaces of both members) are in contact with each other over almost the entire surface. It has become.

  In the present embodiment, the rotation position of the valve body 20 can be changed without attaching or detaching the valve body 20 from the exhaust pipe 12. Changes can be made quickly with very simple operations. In addition, in the present embodiment, the changing operation of the rotational position of the valve main body 20 is very simple, and the rotational position of the valve main body 20 can be reliably changed. Thus, the user can change the rotational position of the valve body 20 by himself / herself. In addition, by forming the operation member 50 with a rubber material having high heat insulation, it is possible to directly push and operate the operation member 50. Of course, when the operation member 50 is at a high temperature, the operation member 50 can be operated by being sandwiched with pliers, pliers or the like. In addition, if a plus or minus driver engagement hole is formed in the outer end surface in the axial direction of the operation member 50, it is possible to easily operate using a driver. That is, the operating member 50 is pressed in the axial direction by the driver to displace the support rod 24 in the axial direction, and at the same time, the driver is rotated while holding the pressing external force, so that the support rod 24 and the valve body 20 are rotated. Can be easily and reliably rotated, and the operation becomes extremely easy.

FIG. 8 shows an exhaust control valve 56 as a first embodiment of the present invention. In the following description, members and parts having the same structure as the reference embodiment shown in FIGS. 1 to 7 are denoted by the same reference numerals as those of the reference embodiment. Therefore, detailed description thereof will be omitted.

  The exhaust control valve 56 of this embodiment differs in the structure of a support rod side contact part and an exhaust pipe side contact part compared with the exhaust control valve (10) of 1st embodiment. More specifically, in the first embodiment, the support rod side contact portion is formed separately from the support rod 24 and fixed to the support rod 24 by welding. However, the support rod side contact portion 58 of the present embodiment is integrally formed at the other end portion in the axial direction of the support rod 24 and has a larger outer diameter than the support rod 24 as a whole. It has a cylindrical shape. A flange 60 that extends outward in the direction perpendicular to the axis is integrally formed at the other end in the axial direction of the support rod side contact portion 58.

Further, the exhaust pipe side abutting portion of the present embodiment is configured by the exhaust pipe side abutting member 36 as in the reference embodiment. Therefore, in the present embodiment, the exhaust pipe side contact member 36 is not formed with the locking teeth (42), and the recess 40 has the support rod side contact portion 58 accommodated therein. It is about the size. Furthermore, a screw hole 62 that penetrates in the direction perpendicular to the axis of the exhaust pipe side contact member 36 is formed in the side wall portion of the recess 40 formed in the exhaust pipe side contact member 36. The positioning bolt 64 is fixed by screwing.

  In the exhaust control valve 56 having such a structure, a recess 40 in which one end surface in the axial direction of the support rod side contact portion 58 is formed in the exhaust pipe side contact member 36 by the urging force of the compression coil spring 52. And the flange 60 formed on the support rod side abutting portion 58 is superimposed on the other end surface in the thickness direction of the exhaust pipe side abutting member 36, whereby the valve body 20 is rotated. The flange formed on the support rod side contact portion 58 and between the one end surface in the axial direction of the support rod side contact portion 58 and the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36. A static frictional force is applied between 60 and the other surface in the thickness direction of the exhaust pipe side contact member 36. As a result, the static friction force becomes a resistance force, and the valve body 20 is held at a predetermined rotation position.

  Further, the valve body 20 is displaced against the urging force of the compression coil spring 52, and a recess 40 formed in one end surface in the axial direction of the support rod side contact portion 58 and the exhaust pipe side contact member 36. In a state where the static frictional force acting between the bottom surface of the gas pipe and the flange 60 formed on the support rod side contact portion 58 and the other surface in the thickness direction of the exhaust pipe side contact member 36 is weakened. The rotation position of the main body 20 can be changed.

  Furthermore, when the positioning bolt 64 screwed into the screw hole 62 is tightened and an external force is exerted on the support rod side contact portion 58 from the direction perpendicular to the axis, the valve main body to the set rotational position is obtained. A holding force of 20 is ensured.

  As is apparent from the above description, in the present embodiment, when an external force is exerted on the support rod 24 provided in the valve body 20 in the rotation direction, one axial direction of the support rod side contact portion 58 is applied. Between the end surface of the exhaust pipe and the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36 and the flange 60 formed in the support rod side contact part 58 and the exhaust pipe side contact member 36. The valve body 20 is held at a predetermined rotational position by utilizing a static frictional force acting between the other surface in the thickness direction, and the valve body 20 is displaced against the urging force of the compression coil spring 52. The rotational position setting and holding mechanism is configured by weakening the above-mentioned static frictional force and enabling the rotational position of the valve body 20 to be changed.

Therefore, also in the exhaust control valve 56 of this embodiment, it is possible to obtain the same effect as that of the reference embodiment.

  Further, in the present embodiment, a screw hole 62 penetrating in the direction perpendicular to the axis of the exhaust pipe side contact member 36 is formed in the side wall portion of the recess 40 formed in the exhaust pipe side contact member 36. A positioning bolt 64 is screwed into the screw hole 62. Then, by tightening the positioning bolt 64 screwed into the screw hole 62, an external force is exerted on the support rod side abutting portion 58 from the direction perpendicular to the axis of the support rod 24, and the valve body 20 is rotated a predetermined time. Since the force to be held at the moving position is ensured, it is possible to advantageously realize the holding of the valve body 20 at the predetermined rotation position.

FIG. 9 shows an exhaust control valve 66 as a second embodiment of the present invention. In the following description, the for reference embodiment similar structure have been members and sites in the drawing are identified by the same reference numerals and reference embodiment, their detailed description Omitted.

The exhaust control valve 66 of this embodiment differs in the structure of the support rod side contact member 28 and the exhaust pipe side contact member 36 compared with the exhaust control valve (10) of the above-mentioned reference embodiment. . More specifically, in the support rod side abutting member 28 of the present embodiment, as shown in FIG. 10, the recess (30) and the locking teeth (32) are formed on one end surface in the thickness direction. Instead, a pair of protrusions 68 are formed so as to protrude from one end face in the thickness direction. In the present embodiment, the pair of protrusions 68 and 68 are formed at positions such that they face each other with the support rod 24 interposed therebetween. Further, as shown in FIG. 11, the exhaust pipe side contact member 36 of the present embodiment is not formed with the locking teeth (42) on the opening end surface of the recess 40. In addition, a plurality of locking holes 70 as locking recesses are formed in the circumferential direction.

  In the exhaust control valve 66 having such a structure, the urging force of the compression coil spring 52 is exerted on the valve body 20, and the pair of protrusions 68, 68 formed on the support rod side abutting member 28 has an exhaust pipe. The valve body 20 is moved to a predetermined rotational position by being accommodated in two locking holes 70, 70 that are opposed to each other in the radial direction among the plurality of locking holes 70 formed in the side contact member 36. Is to be held. On the other hand, the valve body 20 is displaced relative to the exhaust pipe 12 against the urging force of the compression coil spring 52, and a pair of projections 68, 68 formed on the support rod side abutting member 28 are on the exhaust pipe side. In a state where the valve body 20 is not accommodated in the locking hole 70 formed in the contact member 36, the rotation position of the valve body 20 can be changed.

  As is apparent from the above description, in the present embodiment, the pair of protrusions 68 and 68 formed on the support rod side contact member 28 constitute a locking protrusion. In this embodiment, the engagement mechanism is configured by the pair of protrusions 68 and 68 formed on the support rod side contact member 28 and the plurality of locking holes 70 formed on the exhaust pipe side contact member 36. Yes. Furthermore, in this embodiment, the support rod side contact member 28 is pressed against the exhaust pipe side contact member 36 by the urging force of the compression coil spring 52, and a pair of protrusions formed on the support rod side contact member 28. 68, 68 are fitted into two locking holes 70, 70 which are opposed to each other in the radial direction among the plurality of locking holes 70 formed in the exhaust pipe side abutting member 36. While holding the moving position, the valve body 20 is displaced relative to the exhaust pipe 12 against the urging force of the compression coil spring 52, and a pair of protrusions 68, 68 formed on the support rod side contact member 28 are formed. A rotation position setting and holding mechanism is configured by making it possible to change the rotation position of the valve body 20 in a state where the valve body 20 is not accommodated in the plurality of locking holes 70 formed in the exhaust pipe side contact member 36. There.

  Therefore, the exhaust control valve 66 of the present embodiment can obtain the same effect as that of the first embodiment.

FIG. 12 shows an exhaust control valve 72 as a third embodiment of the present invention. In the following description, members and parts having the same structure as those of the above-described reference embodiment will be described in detail by attaching the same reference numerals as those of the reference embodiment in the drawings. Description is omitted.

The exhaust control valve 72 of the present embodiment differs from the exhaust control valve (10) of the above-described reference embodiment in the structure of the support rod side contact portion and the exhaust pipe side contact portion. More specifically, the support rod side contact portion of the first embodiment is configured by the support rod side contact member 28 formed separately from the support rod 24. As shown in FIG. 13, the rod-side contact portion 74 is formed integrally with the other end portion in the axial direction of the support rod 24, and has a thick disk shape as a whole. In addition, a plurality of serrated locking teeth 76 are formed on the outer peripheral surface.

Further, the exhaust pipe side abutting portion of the present embodiment is configured by the exhaust pipe side abutting member 36 as in the above-described reference embodiment. In this regard, the exhaust pipe side contact member 36 of the present embodiment, as shown in FIG. 14, is a locking tooth (fitting with the opening end surface of the recess 40 in the axial direction of the support rod 24. 42) is not formed, and instead, a serrated locking tooth that meshes with a locking tooth 76 formed on the support rod side contact portion 74 with respect to the inner peripheral surface of the recess 40. A plurality of 78 are formed.

  In the exhaust control valve 72 having such a structure, the urging force of the compression coil spring 52 is exerted on the valve main body 20, and the locking teeth 76 formed on the support rod side abutting portion 74 have the exhaust pipe side contact. The engaging rod 78 is engaged with the locking teeth 78 formed on the contact member 36, and one surface in the thickness direction of the support rod side contact portion 74 is in contact with the bottom surface of the recess 40 formed on the exhaust pipe side contact member 36. By being brought into contact with each other, the valve body 20 can be held at a predetermined rotational position. On the other hand, the valve body 20 is displaced relative to the exhaust pipe 12 against the urging force of the compression coil spring 52, and the locking teeth 76 formed on the support rod side contact portion 74 and the exhaust pipe side contact are formed. The rotation position of the valve body 20 can be changed by releasing the engagement state of the locking teeth 78 formed on the member 36.

  As is apparent from the above description, in the present embodiment, each of the locking teeth 76 formed on the support rod side abutting portion 74 and the locking teeth 78 formed on the exhaust pipe side abutting member 36 has a shaft. The engagement mechanism is configured by the engagement teeth 76 formed on the support rod side abutment portion 74 and the engagement teeth 78 formed on the exhaust pipe side abutment member 36 as well as the right-angle direction engagement teeth. ing. In the present embodiment, the support rod side abutting portion 74 is pressed against the exhaust pipe side abutting member 36 by the urging force of the compression coil spring 52, and the locking teeth 76 formed on the support rod side abutting portion 74. By engaging the locking teeth 78 formed on the exhaust pipe side abutting member 36, the valve body 20 is held at a predetermined rotation position, while the compression coil spring 52 is resisted against the biasing force of the compression rod spring 52. The abutment portion 74 is separated from the exhaust pipe side abutment member 36, and the engagement teeth 76 formed on the support rod side abutment portion 74 and the engagement teeth 78 formed on the exhaust pipe side abutment member 36 are engaged. The rotation position setting and holding mechanism is configured by releasing the combination and allowing the rotation position of the valve body 20 to be changed.

  Therefore, the exhaust control valve 72 of the present embodiment can achieve the same effect as that of the first embodiment.

FIG. 15 shows an exhaust control valve 80 as a fourth embodiment of the present invention. In the following description, members and parts having the same structure as those of the above-described reference embodiment will be described in detail by attaching the same reference numerals as those of the reference embodiment in the drawings. Description is omitted.

The exhaust control valve 80 of the present embodiment differs from the exhaust control valve (10) of the above-described reference embodiment in the structure of the support rod side contact member and the exhaust pipe side contact member. More specifically, the support rod side abutting member 82 of the present embodiment has a rod shape extending in the direction perpendicular to the axis of the support rod 24 as shown in FIG. In FIG. 4, the other end surface in the axial direction of the support rod 24 is fixed by welding. Further, as shown in FIG. 17, the exhaust pipe side contact member 36 of the present embodiment is not formed with the locking teeth (42) on the opening end face of the recess 40, and instead In addition, a plurality of notches 84 are formed.

  In the exhaust control valve 80 having such a structure, the urging force of the compression coil spring 52 is exerted on the valve body 20, and both axial ends of the support rod side contact member 82 become the exhaust pipe side contact member 36. The valve body 20 can be held at a predetermined rotational position by being placed in the housing position with respect to the two notches 84 and 84 that are opposed to each other in the radial direction among the formed notches 84. . On the other hand, the valve body 20 is displaced relative to the exhaust pipe 12 against the urging force of the compression coil spring 52, and both axial ends of the support rod side contact member 82 are formed in the exhaust pipe side contact member 36. The rotation position of the valve main body 20 can be changed in a state where the plurality of cutouts 84 are not accommodated in the accommodated positions.

  As is clear from the above description, in the present embodiment, the support rod side abutting member 82 constitutes an axial perpendicular projection. In the present embodiment, the engagement mechanism is configured by the plurality of notches 84 formed in the support rod side contact member 82 and the exhaust pipe side contact member 36. Furthermore, in this embodiment, the support rod side contact member 82 is pressed against the exhaust pipe side contact member 36 by the biasing force of the compression coil spring 52, and both axial ends of the support rod side contact member 82 are connected to the exhaust pipe. The valve body 20 is held at a predetermined rotational position by fitting into two notches 84, 84 that are opposed to each other in the radial direction among the plurality of notches 84 formed in the side contact member 36, while the compression coil spring The support rod side contact member 82 is separated from the exhaust pipe side contact member 36 against the urging force of 52, and both axial ends of the support rod side contact member 82 are formed in the exhaust pipe side contact member 36. As a state where the valve body 20 is not fitted in the notch 84, the rotation position of the valve body 20 can be changed, whereby a rotation position setting and holding mechanism is configured.

Therefore, also in the exhaust control valve 80 of the present embodiment, it is possible to obtain the same effect as the above-described reference embodiment.

18 and 19 show an exhaust control valve 86 as another reference embodiment of the present invention. In the following description, reference embodiment similar structure have been members and sites described above, in the drawing, by subjecting such aforementioned reference embodiment and the same reference numerals, their Detailed description is omitted.

  The exhaust control valve 86 of the present embodiment differs from the first exhaust control valve (10) in the structure of the valve body. More specifically, the valve body 86 of the present embodiment has a spherical shape, and a pair of support protrusions 90, 90 projecting outward are integrally formed on the outer peripheral surface at a position opposed to each other in the radial direction. Is formed. The valve body 20 is formed with a through hole 92 that penetrates in a direction substantially orthogonal to the direction in which the pair of support protrusions 90 project. The pair of support protrusions 90 and 90 are inserted into the insertion holes 26 and 26 formed in the exhaust pipe 12, respectively, so that the valve body 88 is arranged on the exhaust passage 18. In addition, the support protrusion side contact member 28 and the contact plate 48 that are pressed against the exhaust pipe side contact member 36 against the support protrusion 90 inserted through each insertion hole 26 in this manner are fixed by welding.

  In the present embodiment, a gap filling member 87 for reducing the gap formed between the valve main body 86 and the exhaust pipe 12 is disposed on the exhaust passage 18.

  As is clear from the above description, in the present embodiment, the pair of support protrusions 90 and 90 constitute a rotation shaft.

Therefore, also in the exhaust control valve 86 of this reference embodiment, it is possible to obtain the same effect as that of the above-described reference embodiment.

FIG. 20 shows an exhaust control valve 94 as another reference embodiment of the present invention. In the following description, reference embodiment similar structure have been members and sites described above, in the figure, by subjecting such aforementioned reference embodiment and the same reference numerals, their Detailed description is omitted.

Compared to the exhaust control valve (10) of the above-described reference embodiment, the exhaust control valve 94 of the present embodiment does not employ a compression coil spring (52), and the contact plate (48). Also, the operation member (50) is not employed. Instead, the exhaust control valve 94 of the present embodiment is formed with a thread 96 on the outer peripheral surface of one end of the support rod 24 in the axial direction. Thereby, in this embodiment, the bolt part 98 is formed in the axial direction one edge part of the support rod 24. FIG. A nut 100 is screwed to the bolt portion 98. Therefore, in the present embodiment, an operation rod 102 that protrudes outward in the direction perpendicular to the axis is integrally formed with the nut 100.

  In the exhaust control valve 94 having such a structure, the nut 100 screwed to the bolt portion 98 of the support rod 24 is moved from one side in the axial direction of the support rod 24 to the other side. The main body 20 is displaced in the axial direction of the support rod 24, and the locking teeth 32 formed on the support rod side contact member 28 are supported against the locking teeth 42 formed on the exhaust pipe side contact member 36. The rod 24 is engaged in the axial direction, whereby the valve body 20 can be held at a predetermined rotational position. On the other hand, the nut 100 screwed to the bolt portion 98 of the support rod 24 is loosened, and the support rod side contact member 28 is separated from the exhaust pipe side contact member 36 to form the support rod side contact member 28. The rotation position of the valve body 20 can be changed by releasing the engagement of the engagement teeth 32 with the engagement teeth 42 formed on the exhaust pipe side contact member 36.

  As is clear from this, in this embodiment, the axial force acting mechanism is moved by moving the nut 100 in the tightening direction and pressing the support rod side contact member 28 and the exhaust pipe side contact member 36. It is configured. In this embodiment, the locking teeth 32 formed on the support rod side contact member 28 and the locking teeth 42 formed on the exhaust pipe side contact member 36 are moved by moving the nut 100 in the tightening direction. Engage and hold the valve body 20 at a predetermined rotational position, while loosening the tightening of the nut 100 and forming the locking teeth 32 formed on the support rod side contact member 28 and the exhaust pipe side contact member 36. The rotation position setting and holding mechanism is configured by releasing the engaged state of the locking teeth 42 and enabling the rotation position of the valve body 20 to be changed.

Accordingly, even in the exhaust control valve 94 according to this reference embodiment, it is possible to obtain the same effect as the reference embodiment described above.

FIG. 21 shows an exhaust control valve 104 as another reference embodiment of the present invention. In the following description, reference embodiment similar structure have been members and sites described above, in the figure, by subjecting such aforementioned reference embodiment and the same reference numerals, their Detailed description is omitted.

The exhaust control valve 104 of the present embodiment employs a compression coil spring (52), a contact plate (48), and an operating member (50), compared to the exhaust control valve (10) of the above-described reference embodiment. Instead, on one side in the axial direction of the support rod 24, an insertion hole 106 that penetrates in the direction perpendicular to the axis of the support rod 24 is formed, and the insertion rod that is inserted into the insertion hole 106. 108 is provided.

  In the exhaust control valve 104 having such a structure, the locking teeth 32 formed on the support rod side contact member 28 are supported by the support rods 42 formed on the exhaust pipe side contact member 36. With the engagement rod 32 inserted into the insertion hole 106 formed in the support rod 24 in the state of being engaged in the axial direction of the support rod 24, the locking teeth 32 formed on the support rod side contact member 28 and The engagement state of the locking teeth 42 formed on the exhaust pipe side contact member 36 is maintained, so that the valve body 20 is held at a predetermined rotational position. On the other hand, the insertion rod 108 is not inserted into the insertion hole 106 formed in the support rod 24, and is formed in the locking tooth 32 formed in the support rod side contact member 28 and the exhaust pipe side contact member 36. When the engagement state of the locking teeth 42 can be released, the rotation position of the valve body 20 can be changed.

  As is apparent from the above description, in this embodiment, the locking teeth 32 formed on the support rod side contact member 28 and the locking teeth 42 formed on the exhaust pipe side contact member 36 are engaged with each other. Thus, the insertion rod 108 is inserted into the insertion hole 106 formed in the support rod 24, and the engagement teeth 32 formed on the support rod side contact member 28 and the engagement formed on the exhaust pipe side contact member 36. By maintaining the teeth 42 in an engaged state, an axial force acting mechanism is constructed. Further, in the present embodiment, the locking rod 32 formed on the support rod side abutting member 28 and the locking tooth 42 formed on the exhaust pipe side abutting member 36 are engaged with each other, and the support rod 24 is formed. The insertion rod 108 is inserted into the insertion hole 106 and the engagement state of the engagement teeth 32 formed on the support rod side contact member 28 and the engagement teeth 42 formed on the exhaust pipe side contact member 36 is maintained. Accordingly, the valve main body 20 is held at a predetermined rotation position, while the insertion rod 108 is not inserted into the insertion hole 106 formed in the support rod 24, and the locking teeth 32 formed in the support rod side contact member 28. And the engagement position of the locking teeth 42 formed on the exhaust pipe side contact member 36 can be released, and the rotational position of the valve body 20 can be set to constitute a rotational position setting holding mechanism. ing.

Therefore, also in the exhaust control valve 104 of the present embodiment, it is possible to obtain the same effect as the above-described reference embodiment.

FIG. 22 shows an exhaust control valve 110 as another reference embodiment of the present invention. In the following description, reference embodiment similar structure have been members and sites described above, in the figure, by subjecting such aforementioned reference embodiment and the same reference numerals, their Detailed description is omitted.

In the exhaust control valve 110 of the present embodiment, the operation member (50) is not employed as compared with the exhaust control valve (110) of the above-described reference embodiment. In the present embodiment, the cover 112 is fixed to the outer peripheral surface of the exhaust pipe 12 by welding so as to cover the periphery of the compression coil spring 52.

  In the exhaust control valve 110 having such a structure, for example, a minus driver is inserted from a through hole 114 formed in the cover 112, and the minus driver is inserted into a notch formed on one end surface in the axial direction of the support rod 24. When the tip of the valve body 20 is positioned, the rotation position of the valve body 20 can be changed by pressing and rotating the support rod 24 with a minus driver.

  Therefore, also in the exhaust control valve 110 of this embodiment, it is possible to obtain the same effect as that of the first embodiment.

  Further, in the present embodiment, since the cover 112 is provided, it is possible to prevent mud and water from being caught on the compression coil spring 52.

Although some embodiments of the present invention have been described in detail including reference embodiments, these are merely examples, and the present invention is not limited in any way by the specific description in the embodiments. It is not intended to be interpreted.

For example, in the above-described embodiment, the exhaust sound is adjusted by the exhaust control valve provided for one exhaust pipe 12 including the reference embodiment . As shown in FIG. 23, the exhaust control valves 10 and 10 disposed in the two exhaust pipes 12 and 12 may be operated together. Specifically, it can be advantageously realized by using the support rod 24 of the exhaust control valve 10 provided in each exhaust pipe 12 in common. In order to facilitate understanding, in FIG. 23, the same reference numerals as those in the above-described embodiment are given to members and parts having the same structure as in the first embodiment.

  In FIG. 23, the support rod side abutting member 28, the exhaust pipe side abutting member 36, the abutting plate 48, and the compression coil spring 52 are employed one by one for each exhaust pipe 12. The support rod side contact member 28, the exhaust pipe side contact member 36, the contact plate 48, and the compression coil spring 52 sandwiched between the two exhaust pipes 12 and 12 are not necessarily required.

  Further, FIG. 23 shows a specific example in which the exhaust control valves 10, 10 disposed on the two exhaust pipes 12, 12 are operated simultaneously. It is also possible to operate the exhaust control valves 10 simultaneously by the same method as when the exhaust control valves 10 and 10 disposed in the two exhaust pipes 12 and 12 are simultaneously operated.

Further, the structure of the valve body is not limited to the structure of the above-described embodiment (including the reference embodiment) . For example, the rotary plate 22 and the support rod 24 are provided in the valve body 20 of the above-described reference embodiment. An integrally formed structure may be used.

Further, a valve unit tube having a structure in which the exhaust control valve employed in the embodiment (including the reference embodiment) is arranged in a tube having a predetermined length is prepared, and the valve unit tube is connected to the exhaust tube. 12 may be used as a part of the exhaust pipe 12, thereby facilitating the work of arranging the exhaust control valve in the exhaust pipe.

In the reference embodiment, the rotary plate 22 has a substantially constant thickness. However, the thickness may be gradually reduced as the rotary plate 22 is separated from the support rod 24. It is possible to reduce the exhaust pressure acting on the pressure 20.

  Furthermore, when the valve body 20 is in the fully closed state and the gap dimension between the valve body 20 and the exhaust pipe 12 is small, for example, an appropriate number and size with respect to the rotating plate 22. You may make it form a through-hole. In this case, such a through hole may be formed when the rotating plate 22 is manufactured, or may be formed after the rotating plate 22 is welded to the support rod 24. Furthermore, a closing member for closing the through hole formed in the rotating plate 22 may be provided, and the number of the through hole formed in the rotating plate 22 may be adjusted by closing the through hole with the closing member. Note that the closing member is advantageously constituted by, for example, a bolt, a rivet, a plate, or the like on which a screw thread that is screwed into a thread groove formed on the inner peripheral surface of the through hole is formed.

Furthermore, in the above embodiment, the exhaust control valve is provided in the vicinity of the connection portion of the exhaust pipe 12 with the muffler 16, but the position where the exhaust control valve is provided is the same as in the first to ninth embodiments. For example, it may be provided in the muffler 16 and closer to the engine 14 than the sound absorbing material, or may be provided in a tail pipe.

In the above embodiment, one exhaust control valve 10 is arranged for one exhaust pipe 12, but a plurality of control valves 10 are arranged for one exhaust pipe 12. This makes it possible to operate the exhaust control valve which is easier to operate. Further, a wider range of exhaust noise can be adjusted by combining the openings of a plurality of exhaust control valves. In this case, the plurality of exhaust control valves disposed in one exhaust pipe may have the same structure or different structures. Further, the position where the exhaust control valve is arranged is not particularly limited, and may be, for example, the front side and the rear side of the muffler.

Furthermore, in the above embodiment, the seal member 46 is disposed so as to be superimposed on the bottom surface of the recess 40 formed in the exhaust pipe side contact member 36 and is also superimposed on the outer peripheral surface of the exhaust pipe 12. In this way, the annular seal member 54 is disposed, but such seal members 46 and 54 are not necessarily required if the gap is sufficiently small. Further, the seal members 46 and 54 are not limited to the shapes of the first to ninth embodiments, and are, for example, shapes such that the coil spring 44 and the seal member 46 are combined into one member. Alternatively, the compression coil spring 52 and the seal member 54 may be combined into a single member.

Further, in the embodiment, the exhaust pipe 12 and the rotary plate 22, the support rods 24, the supporting rod side contact member 28, the exhaust pipe side contact member 36, etc., had been made of stainless steel, other materials, For example, it may be formed of various metal materials such as iron, titanium, and aluminum alloy, or a synthetic resin material that can satisfy heat resistance under the usage environment.

In addition, in the said embodiment, although the specific example of what applied this invention with respect to the exhaust control valve distribute | arranged to the exhaust pipe of a motorcycle was shown, this invention is distribute | arranged to the exhaust pipe of a motor vehicle. Of course, the present invention can also be applied to an exhaust control valve.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is the schematic of the exhaust pipe provided with the exhaust control valve as reference embodiment of this invention. FIG. 2 is a longitudinal sectional view of the exhaust control valve shown in FIG. 1, corresponding to the direction II-II in FIG. 3. It is III-III sectional drawing in FIG. FIG. 3 is a plan view showing a rotating plate employed in the exhaust control valve shown in FIG. 2. It is VV sectional drawing in FIG. FIG. 4 is a view for explaining a support rod side abutting member employed in the exhaust control valve shown in FIG. 2, and is a cross-sectional view corresponding to a VI-VI direction in FIG. 2. FIG. 3 is a plan view for explaining an exhaust pipe side abutting member employed in the exhaust control valve shown in FIG. 2 and is a view seen from an opening end face side. It is a longitudinal cross-sectional view of the exhaust control valve as 1st embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. It is a longitudinal cross-sectional view of the exhaust control valve as 2nd embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. FIG. 10 is a view for explaining a support rod side contact member employed in the exhaust control valve shown in FIG. 9, and is a cross-sectional view corresponding to the XX direction in FIG. 9. FIG. 10 is a view for explaining an exhaust pipe side abutting member employed in the exhaust control valve shown in FIG. 9, as viewed from the opening end face side. It is a longitudinal cross-sectional view which shows the exhaust control valve as 3rd embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. FIG. 13 is a view for explaining a support rod side contact portion in the exhaust control valve shown in FIG. 12, and is a cross-sectional view corresponding to the XIII-XIII direction in FIG. 12. It is drawing for demonstrating the exhaust pipe side contact member employ | adopted as the exhaust control valve shown by FIG. 12, Comprising: It is drawing seen from the opening end surface side. It is a longitudinal cross-sectional view which shows the exhaust control valve as 4th embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. FIG. 16 is a view for explaining a support rod side contact member employed in the exhaust control valve shown in FIG. 15, and is a cross-sectional view corresponding to the XVI-XVI direction in FIG. 15. FIG. 16 is a view for explaining an exhaust pipe side abutting member employed in the exhaust control valve shown in FIG. 15 and is a view seen from the opening end face side. FIG. 20 is a longitudinal sectional view showing an exhaust control valve according to another embodiment of the present invention, which is a sectional view corresponding to the XVIII-XVIII direction in FIG. 19. It is XIX-XIX sectional drawing in FIG. It is a longitudinal cross-sectional view which shows the exhaust control valve as another reference embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. It is a longitudinal cross-sectional view which shows the exhaust control valve as another reference embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. It is a longitudinal cross-sectional view which shows the exhaust control valve as another reference embodiment of this invention, Comprising: It is drawing equivalent to the II-II direction in FIG. It is drawing which shows the structure for setting simultaneously the rotation position of the valve body employ | adopted as two exhaust control valves.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Exhaust control valve 12 Exhaust pipe 14 Engine 18 Exhaust passage 20 Valve main body 24 Support rod 28 Support rod side contact member 36 Exhaust pipe side contact member

Claims (7)

A rotating shaft is provided on an exhaust passage through which exhaust gas discharged from the internal combustion engine passes, and extends in a direction substantially perpendicular to the passage direction of the exhaust passage in a state of being disposed on the exhaust passage. The displacement of the exhaust passage relative to the passage wall of the exhaust passage is enabled in the axial direction, and the passage of the exhaust passage is disconnected by being rotated in the circumferential direction of the rotation shaft. A valve body that changes the area;
A rotary shaft side contact portion formed at a corresponding position on the rotary shaft of the valve body and the passage wall of the exhaust passage, and brought into contact with each other by displacement of the rotary shaft in one axial direction; A passage wall side contact portion;
An axial force acting mechanism for applying an axial force to the pivot shaft in a direction in which the pivot shaft-side abutting section is pressed against the passage wall side abutting section;
The valve body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force acting mechanism, while the axial force A rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the action mechanism;
Provided, and
An engagement mechanism that is detachable in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion and prevents relative rotation in the circumferential direction by engagement. And providing the engagement position of the engagement mechanism at a plurality of positions in the circumferential direction of the rotation shaft so that the rotation position of the valve body can be set in a plurality of stages, and the rotation shaft side contact The valve body is held in a predetermined rotation position by pressing the portion against the passage wall side contact portion to bring the engagement mechanism into an engaged state, while the passage wall of the rotation shaft side contact portion The rotation position setting and holding mechanism is configured by releasing the pressing to the side abutting portion and allowing the rotation position of the valve body to be changed by disengaging the engagement mechanism.
The rotating shaft side abutting portion and the passage wall side abutting portion are inserted / extracted in the axial direction by an axial force exerted by the axial force acting mechanism, and are inserted / extracted therein. The axially perpendicular locking teeth meshing with each other are formed on the inner and outer peripheral surfaces that are superposed in the direction perpendicular to the axial direction of the portions, and the engagement mechanism is constituted by these axially perpendicular locking teeth. Exhaust control valve. A rotating shaft is provided on an exhaust passage through which exhaust gas discharged from the internal combustion engine passes, and extends in a direction substantially perpendicular to the passage direction of the exhaust passage in a state of being disposed on the exhaust passage. The displacement of the exhaust passage relative to the passage wall of the exhaust passage is enabled in the axial direction, and the passage of the exhaust passage is disconnected by being rotated in the circumferential direction of the rotation shaft. A valve body that changes the area;
A rotary shaft side contact portion formed at a corresponding position on the rotary shaft of the valve body and the passage wall of the exhaust passage, and brought into contact with each other by displacement of the rotary shaft in one axial direction; A passage wall side contact portion;
An axial force acting mechanism for applying an axial force to the pivot shaft in a direction in which the pivot shaft-side abutting section is pressed against the passage wall side abutting section;
The valve body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force acting mechanism, while the axial force A rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the action mechanism;
Provided, and
An engagement mechanism that is detachable in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion and prevents relative rotation in the circumferential direction by engagement. And providing the engagement position of the engagement mechanism at a plurality of positions in the circumferential direction of the rotation shaft so that the rotation position of the valve body can be set in a plurality of stages, and the rotation shaft side contact The valve body is held in a predetermined rotation position by pressing the portion against the passage wall side contact portion to bring the engagement mechanism into an engaged state, while the passage wall of the rotation shaft side contact portion The rotation position setting and holding mechanism is configured by releasing the pressing to the side abutting portion and allowing the rotation position of the valve body to be changed by disengaging the engagement mechanism.
Either one of the rotation shaft side contact portion and the passage wall side contact portion is provided on the other of the rotation shaft side contact portion and the passage wall side contact portion in the axial direction of the rotation shaft. A locking projection that protrudes in the axial direction of the rotating shaft from a face that faces the rotating shaft is formed, and the other of the rotating shaft side abutting portion and the passage wall side abutting portion is provided with the rotating projection. A locking recess is formed in the axial direction of the moving shaft so as to open on a surface opposed to one of the rotating shaft side contact portion and the passage wall side contact portion and into which the locking protrusion is fitted. The exhaust control valve is characterized in that the engagement mechanism is constituted by the engagement protrusion and the engagement recess. A rotating shaft is provided on an exhaust passage through which exhaust gas discharged from the internal combustion engine passes, and extends in a direction substantially perpendicular to the passage direction of the exhaust passage in a state of being disposed on the exhaust passage. The displacement of the exhaust passage relative to the passage wall of the exhaust passage is enabled in the axial direction, and the passage of the exhaust passage is disconnected by being rotated in the circumferential direction of the rotation shaft. A valve body that changes the area;
A rotary shaft side contact portion formed at a corresponding position on the rotary shaft of the valve body and the passage wall of the exhaust passage, and brought into contact with each other by displacement of the rotary shaft in one axial direction; A passage wall side contact portion;
An axial force acting mechanism for applying an axial force to the pivot shaft in a direction in which the pivot shaft-side abutting section is pressed against the passage wall side abutting section;
The valve body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force acting mechanism, while the axial force A rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the action mechanism;
Provided, and
An engagement mechanism that is detachable in the axial direction of the rotation shaft between the rotation shaft side contact portion and the passage wall side contact portion and prevents relative rotation in the circumferential direction by engagement. And providing the engagement position of the engagement mechanism at a plurality of positions in the circumferential direction of the rotation shaft so that the rotation position of the valve body can be set in a plurality of stages, and the rotation shaft side contact The valve body is held in a predetermined rotation position by pressing the portion against the passage wall side contact portion to bring the engagement mechanism into an engaged state, while the passage wall of the rotation shaft side contact portion The rotation position setting and holding mechanism is configured by releasing the pressing to the side abutting portion and allowing the rotation position of the valve body to be changed by disengaging the engagement mechanism.
Either one of the rotating shaft side abutting portion and the passage wall side abutting portion is rotated in the direction perpendicular to the axis of the rotating shaft when an axial force is exerted by the axial force acting mechanism. An axis perpendicular projection protruding in a direction perpendicular to the axis of the rotation shaft from a surface opposed to the other of the dynamic shaft side contact portion and the passage wall side contact portion is formed, and the rotation shaft The other of the side contact portion and the passage wall side contact portion is perpendicular to the axis of the rotating shaft when an axial force is exerted by the axial end surface of the rotating shaft and the axial force acting mechanism. The projection perpendicular to the axis is engaged in the axial direction of the rotating shaft by opening in both of the surfaces facing the rotating shaft side abutting portion and the passage wall side abutting portion in the direction. and notches are formed to be, discharged, characterized in that said engaging mechanism by axial right angle direction protrusions and notch are configured Control valve. A rotating shaft is provided on an exhaust passage through which exhaust gas discharged from the internal combustion engine passes, and extends in a direction substantially perpendicular to the passage direction of the exhaust passage in a state of being disposed on the exhaust passage. The displacement of the exhaust passage relative to the passage wall of the exhaust passage is enabled in the axial direction, and the passage of the exhaust passage is disconnected by being rotated in the circumferential direction of the rotation shaft. A valve body that changes the area;
A rotary shaft side contact portion formed at a corresponding position on the rotary shaft of the valve body and the passage wall of the exhaust passage, and brought into contact with each other by displacement of the rotary shaft in one axial direction; A passage wall side contact portion;
An axial force acting mechanism for applying an axial force to the pivot shaft in a direction in which the pivot shaft-side abutting section is pressed against the passage wall side abutting section;
The valve body is held at a predetermined rotation position by utilizing the pressing state of the rotation shaft side contact portion against the passage wall side contact portion by the axial force acting mechanism, while the axial force A rotational position setting and holding mechanism that enables the rotational position of the valve body to be changed by releasing the axial force exerted by the action mechanism;
Provided, and
Utilizing a static frictional force acting on the contact surface between the rotation shaft side contact portion and the passage wall side contact portion in a state where the rotation shaft side contact portion is pressed against the passage wall side contact portion. While holding the valve main body at a predetermined rotation position, the pressing force state of the rotation shaft side contact portion against the passage wall side contact portion is released, and the rotation shaft side contact portion and the passage wall are released. An exhaust control valve characterized in that the rotational position setting and holding mechanism is configured by weakening a static frictional force acting between the side contact portion and enabling the rotational position of the valve body to be changed. A compression coil spring that exerts an urging force in an axial direction of the rotation shaft of the valve body and in a direction in which the rotation shaft side contact portion is pressed against the passage wall side contact portion; The exhaust control valve according to any one of claims 1 to 4 , wherein the axial force acting mechanism is configured by pressing the rotating shaft side contact portion against the passage wall side contact portion. A screw thread is formed on the outer peripheral surface of the rotating shaft in the valve body to provide a bolt portion on the rotating shaft, and a nut to be screwed to the bolt portion is provided and screwed to the bolt portion. By rotating the tightened nut to relatively drive the bolt portion in the axial direction, the valve body including the rotation shaft on which the bolt portion is formed is relative to the passage wall of the exhaust passage. The exhaust control valve according to any one of claims 1 to 5 , wherein the axial force acting mechanism is configured by displacing and pressing the rotating shaft side contact portion against the passage wall side contact portion. The valve body is formed with an insertion hole extending in a direction perpendicular to the rotation axis with respect to the rotation shaft, and a rod inserted into the insertion hole is provided. The axial force acting mechanism is configured by inserting the rod through the insertion hole in a state of being pressed against the shaft and maintaining the pressing state of the rotating shaft side contact portion against the passage wall side contact portion. Item 7. The exhaust control valve according to any one of Items 1 to 6 .

Images