JP2007192087A - Exhaust control valve and method for fitting same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new structure exhaust control valve capable of being easily fitted in a middle part of an exhaust pipe. <P>SOLUTION: The exhaust control valve 10 is constructed by forming a shaft support hole 38 and a valve element insertion hole 70 at positions opposing in a radial direction one direction on a circumference wall of an exhaust pipe 12, and including a valve member 20 constructed with including a valve element 24 including a rotary shaft 22, inserted in the exhaust pipe 12 from the valve element insertion hole 70 and provided rotatably in the exhaust pipe 12 under a condition where the rotary shaft 22 extends in an axially perpendicular direction in which the shaft support hole 38 and the valve element insertion hole 70, cover members 56, 58 covering the valve element insertion hole 70, and rotary position setting retention members 42, 56, 114, 100 changeably positioning rotary positions of the rotary shaft 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an exhaust control valve that is mounted on an exhaust passage through which exhaust gas passes to adjust the exhaust gas discharge amount.

  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. Such 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 discharged into the atmosphere after the pressure and temperature are reduced through the muffler, whereby the exhaust gas is released into the atmosphere. The sound at the time (exhaust sound) 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. For example, exhaust noise when driving a motorcycle or an automobile in a residential area in the early morning or late at night tends to be a problem.

  Therefore, an exhaust gas control valve as described in Patent Document 1 (Japanese Utility Model Laid-Open No. 4-8735) has been proposed. This exhaust gas control valve is configured such that a butterfly valve is configured by fixing a disc-like valve body to a rotating shaft inserted and disposed at a position passing through the center of the cross section of the exhaust pipe. Is moved, so that the opening of the butterfly valve is adjusted. In this way, the exhaust noise can be adjusted by controlling the passage sectional area of the exhaust pipe and adjusting the exhaust amount.

  The inventor of the present application also proposed an exhaust control valve having a compact structure in Patent Document 2 (Japanese Patent No. 3701297). The exhaust control valve is configured such that the rotation shaft side contact portion formed on the rotation shaft of the butterfly valve and the exhaust pipe side contact portion formed on the exhaust pipe are held in contact with each other, thereby The opening is maintained.

  However, when these exhaust control valves are attached to the middle portion of the exhaust pipe, first, the exhaust pipe is cut near the attachment position, and a hole for a rotating shaft is formed in the side wall of the exhaust pipe to turn the rotary shaft. After inserting the valve body, insert the valve body from one side of the exhaust pipe, perform welding in the exhaust pipe and fix the valve body to the rotating shaft, and then re-weld the cut exhaust pipe This was a very time-consuming work. Therefore, it is not suitable for general users. In addition, there is a problem that a welding mark remains and the appearance is impaired, and once it is attached, it is difficult to remove, and there is a problem that maintenance such as replacement of parts is lacking.

  Therefore, in Patent Document 3 (Japanese Patent Laid-Open No. 63-208612), a butterfly valve pivotally supported by a support member is pre-assembled outside the exhaust pipe, and then the butterfly valve is formed on the exhaust pipe together with the support member. A structure that is inserted and fixed from an opening is disclosed. However, since this structure is housed in the exhaust pipe together with the support member, the size is increased. In addition, since the storage space for the support member is also required in the exhaust pipe, the size of the valve body may be reduced and may not function effectively. In other words, the structure described in Patent Document 3 can be used effectively only for a specific part of an exhaust pipe having a specific structure as described in this document, and it is difficult to attach it to an appropriate position of the exhaust pipe. Met.

Japanese Utility Model Publication No. 4-8735 Japanese Patent No. 3701297 JP-A-63-208612

  Here, the present invention has been made in the background as described above, and the problem to be solved is an exhaust control of a novel structure that can be easily attached to an intermediate portion of the exhaust pipe. To provide a valve.

  It is another object of the present invention to provide an easy installation method of an exhaust control valve and an assembly set of an exhaust control valve suitably used for such an installation method.

  Hereinafter, embodiments of the present invention made to solve the above-described problems will be described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  That is, the present invention relating to an exhaust control valve is an exhaust control valve provided on an exhaust passage of an exhaust pipe, and a shaft support hole formed at one position opposed to the circumferential wall of the exhaust pipe in one radial direction, and the other And a plate-shaped valve body having a pivot shaft, and is inserted into the exhaust pipe through the valve body insertion hole. A valve member rotatably disposed inside the exhaust pipe in a state where the shaft extends in a direction perpendicular to the axis of the shaft support hole and the valve body insertion hole, and is superimposed on the exhaust pipe from the outside. It is characterized by comprising a cover member that is fixed and covers the valve element insertion hole, and a rotation position setting holding means that positions the rotation position of the rotation shaft so as to be changeable.

  In the exhaust control valve structured according to the present invention, the exhaust sound is produced by adjusting the rotational position of the valve member disposed inside the exhaust pipe and changing the passage area of the exhaust passage inside the exhaust pipe. It becomes possible to adjust.

  In particular, according to the structure according to the present invention, the valve member including the valve body is inserted and disposed from the outside of the exhaust pipe through the valve body insertion hole formed in the peripheral wall of the exhaust pipe. It has become so. Thereby, even if it is the intermediate part of an exhaust pipe, a valve body can be arrange | positioned inside an exhaust pipe, without cut | disconnecting an exhaust pipe. Therefore, even a user who does not have welding technology or equipment, such as a general motorcycle user, can easily perform the installation by himself / herself. Further, since welding is not necessary, the appearance is not impaired by leaving a welding mark. Furthermore, since parts can be easily replaced, the maintainability can be improved.

  The shaft support hole in the present invention may or may not penetrate the peripheral wall of the exhaust pipe. That is, for example, a through hole that penetrates the peripheral wall as a shaft support hole may be formed, and the rotating shaft may be inserted into and supported by the through hole, or may not penetrate the peripheral wall as the shaft support hole. A concave hole may be formed on the inner surface of the peripheral wall, and the concave hole may be supported by fitting the end of the rotating shaft.

  Further, the specific shape of the valve body insertion hole is not limited as long as the valve member can be inserted into the exhaust pipe. Preferably, in order to prevent the leakage of the fluid flowing in the exhaust pipe and the decrease in the strength of the exhaust pipe as much as possible, the valve member has a substantially similar shape slightly larger than the side view shape along the longitudinal direction of the exhaust pipe. Preferably it is formed. In this way, the opening size of the valve element insertion hole occupying the cross section of the exhaust pipe can be reduced, and a reduction in the strength of the exhaust pipe can be prevented as much as possible.

  Further, in the exhaust control valve according to the present invention, the rotation shaft of the valve member is disposed through the exhaust pipe at at least one axial end, and passes through the exhaust pipe to the outside. A mode in which an operation handle is provided on the pivot shaft protruding in the direction can be suitably employed.

  In this way, the turning operation of the turning shaft can be easily performed. The specific structure of the operation handle is not particularly limited, and a disc-shaped gripping member is provided at the end of the rotating shaft protruding outside the exhaust pipe, or a rod-like operation is provided. The structure provided with the lever is illustrated.

  Further, in the exhaust control valve according to the present invention, the rotation shaft of the valve member is disposed through the exhaust pipe at at least one axial end portion, and is passed through the exhaust pipe. Further, a locking means for positioning the rotation position of the rotation shaft with respect to the exhaust pipe so as to be changeable at a plurality of positions around the central axis is provided, and the rotation position setting holding means is configured by the locking means. The aspect which is mentioned can be employ | adopted suitably.

  In this way, the rotational position of the valve body can be stably held even when the pressure of the fluid flowing through the exhaust passage is high by locking and positioning the rotational shaft with the locking means. I can do it.

  Furthermore, in the exhaust control valve according to the present invention, it is preferable that the rotating shaft is positioned with respect to the lid member fixed to the exhaust pipe by the locking means. Can be employed.

  If it does in this way, a latching means can be provided in a lid member. This eliminates the need to lock the rotating shaft with the exhaust pipe, thereby reducing the possibility of impairing the durability of the exhaust pipe. Further, by providing the exhaust pipe with the lid member provided with the locking means, both the lid member and the locking means can be provided at the same time on the exhaust pipe, and the assembly efficiency of the exhaust control valve in the present invention is improved. You can also

  Furthermore, in the exhaust control valve according to the present invention, an end of the rotating shaft on the side opposite to the lid member is protruded to the outside through the exhaust pipe. A rotation shaft side contact portion formed at a corresponding position between the provided operation handle, the rotation shaft and the lid member and brought into contact with each other by displacement of the rotation shaft in one axial direction. And the exhaust pipe side abutting portion and the rotational axis side abutting portion and the exhaust pipe side abutting portion can be engaged and disengaged in the axial direction of the pivot shaft, and the circumferential direction relative to each other by engagement. Engagement means for preventing rotation at a plurality of positions, and for causing an axial force to act on the rotation shaft with respect to a direction in which the rotation shaft side contact portion is pressed against the exhaust pipe side contact portion. An axial force acting means, and the exhaust pipe side of the rotating shaft side contact portion by the axial force acting means The rotating means is held at a predetermined rotating position by making the engaging means into an engaged state by utilizing the pressing state against the contact portion, and the exhaust pipe side of the rotating shaft side contact portion An aspect in which the rotation position setting holding means is configured by releasing the pressing to the contact portion and allowing the operation handle to change the rotation position of the rotation shaft by releasing the engagement means. Can be suitably employed.

  In this way, the rotational position of the valve body can be easily adjusted by operating the operating handle to bring the engaging means into the disengaged state, and when fixing the position of the valve body, By maintaining the pressing state of the rotating shaft side contact portion and the exhaust pipe side contact portion by the directional force acting means, the positioning and fixing can be performed firmly.

  In particular, in this embodiment, since the operation handle and the rotation shaft side contact portion are both provided at the end of the rotation shaft, the rotation position that holds the rotation position of the valve body in a changeable manner. Each member constituting the setting and holding means is disposed near the rotation shaft, so that the rotation position setting and holding means can be configured in a compact manner.

  Further, in the exhaust control valve according to the present invention, the axial force acting means moves the rotational shaft toward the rotational shaft in a direction opposite to the pressing direction of the rotational shaft side contact portion against the exhaust pipe side contact portion. By selectively applying an axial force, the engaging means in the rotational position setting holding means is displaced in the axial direction against the axial force by the axial force acting means. The aspect which provided the axial direction force cancellation | release means which hold | maintains in a detachment | leave state can be employ | adopted suitably.

  In this way, the engagement means can be easily released. Further, since the disengaged state can be maintained, the rotational position of the valve body can be easily adjusted under the state where the engaging means is disengaged. The specific structure of the axial force releasing means is not particularly limited, and preferably, for example, a structure that applies an axial acting force by directly pressing the rotating shaft in the axial direction is adopted. Can be done.

  Furthermore, in the exhaust control valve according to the present invention, a structure provided with a roller bearing that rotatably supports the rotating shaft of the valve member with respect to the exhaust pipe can be suitably employed.

  In this way, the rotation of the rotation shaft around the central axis can be performed more smoothly, and the setting operation of the rotation position of the valve body can be performed more smoothly. Furthermore, since the axial displacement of the rotating shaft can be performed more smoothly, especially in the exhaust control valve provided with the aforementioned engaging means, the engaging means can be easily engaged and disengaged. I can do it.

  Furthermore, in the exhaust control valve according to the present invention, a mode in which a rotation position display means for recognizing the spreading direction of the valve body from the outside of the exhaust pipe can be suitably employed.

  If it does in this way, the spreading direction of a valve body can be grasped | ascertained easily from the exterior of an exhaust pipe, and the adjustment operation | work of the rotation position of a valve body can be performed more easily. As a specific structure of the rotation position display means, various structures can be appropriately employed. For example, the end surface of the rotation shaft and the end surface of a member attached to the rotation shaft and rotating integrally with the rotation shaft are exposed from the outside of the exhaust pipe so as to be visible, and the end of the rotation shaft This can be realized by displaying a dotted or linear mark indicating the rotation position. Alternatively, the operating handle for rotating the rotating shaft may be configured in a rod shape, and the extending direction of the operating handle may be set to the same direction as the expanding direction of the valve body. In this way, the spreading direction of the valve body inside the exhaust pipe can be recognized more intuitively.

  A mode in which a rotation range limiting means for limiting the rotation range of the rotation shaft around the central axis with respect to the exhaust pipe can be suitably employed.

  In this way, it is possible to prevent the valve body from rotating more than necessary and to adjust the opening of the exhaust passage by a reciprocating rotation operation within a predetermined angle range. In this aspect, the rotation range of the rotation shaft is preferably limited to about 90 °, and thereby, the minimum opening degree in which the spreading direction of the valve body is substantially perpendicular to the exhaust passage direction. From this, it is possible to set a range of the maximum opening in which the spreading direction of the valve body is substantially equal to the exhaust passage direction.

  Further, in the exhaust control valve according to the present invention, the rotating shaft and the valve body are formed separately, and a slit-like valve body insertion hole extending in the axial direction is provided through the rotating shaft. A mode in which the valve member is configured by inserting and fixing a plate-like valve plate member as the valve body into the valve body insertion hole can be suitably employed.

  If it does in this way, a valve body can be easily attached to a rotation axis. And since a valve body is fixed so that a rotation axis may be penetrated, the thickness dimension in the side view of a valve member can be made equal to the diameter dimension of a rotation axis. Thereby, the valve body insertion hole formed in an exhaust pipe can be made small, and the fall of the intensity | strength of an exhaust pipe and the leakage of exhaust gas can be suppressed. Further, since the left and right shapes in the side view are targeted, it is not necessary to be aware of the direction when assembling, and assembling can be facilitated.

  In this aspect, it is preferable that the rotating plate is screwed to the rotating shaft or attached by fitting with the rotating plate. If it does in this way, a rotation board can be easily attached to a rotation axis, without performing welding etc.

  Further, in the exhaust control valve according to the present invention, the opening width dimension of the valve element insertion hole is partially increased to form a bolt insertion hole, but is larger than the opening width dimension of the valve element insertion hole. A mounting bolt is used in which a notch surface is formed at the head-side end of the threaded portion having a diameter, and the outer diameter dimension of the notch surface is smaller than the opening width dimension of the valve element insertion hole. And the threaded portion of the mounting bolt is notched at the position where the head of the mounting bolt is inserted into the exhaust pipe from the bolt insertion hole of the valve body insertion hole and removed from the bolt insertion hole. When the notch surface of the threaded portion is inserted into the valve body insertion hole at the portion where the surface is formed and the opening end edge of the valve body insertion hole is locked, the displacement in the bolt center axis direction and the bolt center axis The threaded portion is removed from the exhaust pipe in a state in which rotation around the motor is prevented. A mode in which the lid member is fixed to the exhaust pipe by a fastening nut that is protruded in the direction and is screwed to a projecting portion of the screw portion from the exhaust pipe can be suitably employed. .

  If it does in this way, a lid member can be attached using a valve body insertion hole skillfully. That is, by inserting a mounting bolt having a notch surface into the valve body insertion hole, the mounting bolt is locked at the opening edge of the valve body insertion hole to prevent the notch surface from falling into the exhaust pipe. By abutting against the inner peripheral surface of the body insertion hole, it becomes possible to exert a tightening reaction force on the mounting bolt based on the abutting force against the inner surface of the exhaust pipe, and stable tightening can be performed. A plurality of bolt insertion holes may be formed in consideration of the ease of inserting the mounting bolts.

  Further, in the exhaust control valve according to the present invention, in the exhaust pipe, the bolt insertion hole is formed at a position facing the shaft support hole in the radial direction of the exhaust pipe, and the bolt insertion hole and the bolt A mode in which both end portions of the rotation shaft are rotatably supported by the shaft support hole can be suitably employed.

  If it does in this way, a bolt insertion hole can be used effectively as a support hole of a rotation axis. And stable support can be performed by supporting both ends of the rotating shaft with the exhaust pipe.

  Furthermore, in the exhaust control valve according to the present invention, a cylindrical reinforcing member is assembled to each of the bolt insertion hole and the shaft support hole penetrating the exhaust pipe, and the reinforcing member is interposed through the reinforcing member. A mode in which both end portions of the rotation shaft are rotatably supported by the exhaust pipe can be suitably employed.

  In this way, since the strength of the exhaust pipe can be ensured, the risk of damage to the exhaust pipe can be reduced. Further, since the opening for supporting the rotation shaft can be formed with higher accuracy, the rotation shaft can be rotated more smoothly.

  Furthermore, in the exhaust control valve according to the present invention, the inner surface formed in a curved surface along the outer peripheral surface of the exhaust pipe is overlapped with the outer peripheral surface of the exhaust pipe, and the outer surface on the opposite side to the inner side surface. Using a cover plate member whose side surface is a flat surface extending in a direction perpendicular to the rotation shaft, the rotation position setting and holding means is configured on the flat surface of the cover plate member to form the rotation shaft. The aspect which comprised the said cover member by adhering the exhaust pipe side contact member which positions the rotation position of this can be employ | adopted suitably.

  If it does in this way, a lid plate member can be manufactured easily and cheaply using press molding etc. And since the attachment site | part of the exhaust pipe side contact member is made into the flat surface, fixation to the cover board member of an exhaust pipe side contact member can be performed easily. Moreover, since the cover plate member is an integrally formed product, the valve element insertion hole can be effectively covered, and leakage of exhaust gas can be effectively prevented.

  Furthermore, in the exhaust control valve according to the present invention, the rotating shaft of the valve member protrudes outward from the exhaust pipe, and a rod that protrudes in a direction perpendicular to the axis of the rotating shaft at the protruding portion. In addition, a mode in which the operating handle is configured by covering the rod with a heat insulating material can be suitably employed.

  In this way, even when the rod portion becomes hot due to the heat of the exhaust pipe, it is possible to prevent the surface of the operating handle from being heated and grip the operating handle. In addition, as a heat insulating material, it is desirable to be comprised with the tube which has heat insulation elasticity, such as a fluororesin and a rubber material, for example. If it does in this way, the effect of slipping of the grip part of an operation handle can also be produced.

  Further, in the exhaust control valve according to the present invention, the exhaust pipe is divided at an intermediate portion on the exhaust passage, and the exhaust pipe divided by inserting the insertion pipe body at the divided portion. The exhaust pipe having a continuous exhaust passage connected to both side portions of the pipe, and the valve member insertion hole is formed in the insertion pipe body and the valve member is incorporated. It can be suitably employed.

  In this way, the exhaust control valve can be easily assembled by pre-assembling the exhaust control valve with respect to the insertion tube body.

  Further, the present invention relating to the method of mounting the exhaust control valve is to form a shaft support hole at one position opposed in one radial direction on the peripheral wall of the exhaust pipe and to extend at the other position opposite to the shaft support hole. After the valve-shaped valve body insertion hole is formed, a valve member configured to include a plate-shaped valve body having a rotation shaft is inserted into the exhaust pipe from the valve body insertion hole, and the rotation is performed. One end of the shaft is fitted into the shaft support hole and incorporated into the exhaust pipe, and then a lid member is overlapped and fixed to the outer peripheral surface of the exhaust pipe, and the valve body insertion hole is secured by the lid member. It is characterized by covering.

  According to the attachment method according to the present invention, the exhaust control valve can be easily attached to the intermediate portion of the exhaust pipe without cutting the exhaust pipe. This eliminates the need for welding the cut exhaust pipe. For example, even a user who does not have welding technology or equipment, such as a general motorcycle user, easily attaches himself / herself. I can do it. And according to this method, there is no such thing as leaving a welding mark and impairing the appearance. Furthermore, since parts can be easily exchanged, the maintainability can be improved.

  In addition, the shaft support hole formed in this attachment method may or may not penetrate the peripheral wall of the exhaust pipe. That is, for example, a through hole that penetrates the peripheral wall as the shaft support hole may be formed, and the rotating shaft may be inserted and positioned through the through hole, or may be penetrated through the peripheral wall as the shaft support hole. A concave hole without a gap may be formed on the inner surface of the peripheral wall, and positioned and disposed so that the end of the rotating shaft is fitted into the concave hole.

  In the exhaust control valve mounting method according to the present invention, the shaft support hole and the valve in the exhaust pipe are formed of a flexible sheet material and wound around the outer peripheral surface of the exhaust pipe. The shaft support hole and the valve pair insertion hole are used by using a positioning sheet on which the shaft support hole and the valve body insertion hole mark and the valve body insertion hole mark are displayed at positions corresponding to the body insertion holes, respectively. Before forming at least one of the above, the positioning sheet is wound around the outer peripheral surface of the exhaust pipe, and the formation position of at least one of the target shaft support hole and the valve body insertion hole is utilized using the mark on the positioning sheet Thus, the aspect determined in this way can be suitably employed.

  In this way, the formation position and shape of the shaft support hole and the valve element insertion hole can be accurately grasped, and the exhaust control valve can be attached more easily and the work accuracy can be further improved. You can also.

  Here, the flexible sheet material used for the positioning sheet may be simple plain paper or a resin film, but preferably, the entire back surface or part of the back surface is provided with an adhesive surface and can be attached. It is desirable that If it does in this way, a positioning sheet can be stuck in the desired position of an exhaust pipe, and position shift of a shaft support hole mark and a valve element insertion hole mark can be prevented effectively during work.

  Further, the shaft support hole mark and the valve body insertion hole mark may be any marks that can indicate the positions of the shaft support hole and the valve body insertion hole, and are not necessarily limited to those having the same shape as those holes. Further, the shaft support hole mark and the valve body insertion hole mark may be formed by printing on the mount, more preferably, for example, formed by a through hole having the shape of a shaft support hole or a valve body insertion hole. You may do it. In this way, after winding the positioning sheet at the desired position of the exhaust pipe, and then painting the shaft support hole mark and valve element insertion hole mark with a magic or the like, the backing sheet is peeled off, so that the outer peripheral surface of the exhaust pipe is removed. The shaft support hole mark and the valve body support hole mark can be transferred, and when the shaft support hole and the valve body insertion hole are drilled, the exhaust pipe can be directly drilled to facilitate the work. I can do it.

  In the exhaust control valve mounting method according to the present invention, the shaft support hole is formed at one position facing the radial wall in one radial direction on the peripheral wall of the exhaust pipe, and the other position opposite to the shaft support hole. When the valve body insertion hole is formed, a central through hole is formed in the exhaust pipe so as to be opposed to the shaft support hole on the same radial direction line, and then the slit extends linearly from the central through hole to both sides. The valve member insertion hole is formed by cutting the valve member, and both ends of the rotating shaft of the valve member inserted into the exhaust pipe through the valve body insertion hole are connected to the shaft support hole and the shaft member. A mode in which the center through hole is rotatably supported and assembled can be suitably employed.

  By doing so, the cutting tool can be inserted into the central through hole and the slit can be cut and formed, so that the valve body insertion hole can be easily formed. In addition, the center through-hole in this aspect can be formed as what comprises the bolt insertion hole in Claim 11, for example.

  Further, the present invention related to an assembly set of exhaust control valves is an assembly set of exhaust control valves for obtaining the exhaust control valve, and includes the valve member and the lid member as constituent members, The valve body insertion hole is formed in a separately prepared vehicle exhaust pipe so that the valve body insertion hole is inserted into the exhaust pipe, and the lid member is The valve member is inserted into the outer peripheral surface of the exhaust pipe and then has a structure for covering the valve element insertion hole.

  If the assembly set according to the present invention is used, an exhaust control valve can be easily attached to an intermediate portion of the exhaust pipe without cutting the exhaust pipe. Thus, for example, by providing this assembly set to a user of a motorcycle, even a general user who does not have a technique such as welding can assemble the exhaust control valve according to the present invention to the exhaust pipe, Exhaust sound adjustment means can be obtained.

  Furthermore, in the assembly set of the exhaust control valve according to the present invention, an aspect including the positioning sheet as a constituent member is suitably employed.

  Here, it is desirable that the positioning sheet is prepared so as to be compatible with several exhaust pipes having different diameters. That is, for example, several positioning sheets with different separation distances between the shaft support hole mark and the valve element insertion hole mark are prepared in advance, or several sets of shaft support holes with different separation distances on one sheet. It is desirable that a positioning sheet on which the mark and the valve element insertion hole mark are displayed is prepared. In particular, when the present invention is applied to an exhaust pipe of a motorcycle, it is desirable that a positioning sheet corresponding to the diameter dimension of the exhaust pipe of some types of vehicles widely used in advance is included.

  Furthermore, in the assembly set of the exhaust control valve according to the present invention, a mode in which a cutting tool for forming the valve body insertion hole in the exhaust pipe is included as a constituent member can be suitably employed.

  In this way, since the shaft support hole and the valve body insertion hole can be formed using this cutting tool, the exhaust control valve can be attached without preparing a special tool when forming the valve body insertion hole. Can be done.

  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. In the following description, in principle, the vertical direction means the vertical direction in FIG.

  FIG. 1 schematically shows an exhaust pipe 12 for a motorcycle equipped with an exhaust control valve 10 as a first embodiment of the present invention.

  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 (see FIG. 2) formed in the exhaust pipe 12, and after being reduced in pressure and temperature by the muffler 16, is discharged into the atmosphere. It has become. As is clear from this, in this embodiment, the exhaust pipe 12 constitutes a passage wall of the exhaust passage 18.

  2 and 3 show the exhaust control valve 10. The exhaust control valve 10 is provided in the exhaust pipe 12 in the vicinity of the connection portion with the muffler 16, and includes a valve main body 20 as a valve member disposed on an exhaust passage 18 formed in the exhaust pipe 12. It is configured. The valve body 20 is configured by integrally attaching a rotating plate 24 as a plate-like valve body formed separately from a shaft 22 as a rotating shaft.

  In detail, the rotating plate 24 has a disk shape having an outer diameter smaller than the inner diameter of the exhaust pipe 12 as a whole, and is made of stainless steel. As shown in FIG. 4, a pair of screw holes 26 are formed on the diameter of the rotating plate 24.

  On the other hand, the shaft 22 has a substantially constant circular cross section and has a shape extending straight in the axial direction, and is made of stainless steel. In particular, in the present embodiment, the axial dimension of the shaft 22 is sufficiently larger than the outer diameter dimension of the exhaust pipe 12. In addition, a slit 28 extending in the axial direction through the shaft 22 in the radial direction is provided in a substantially intermediate portion in the axial direction of the shaft 22. The axial length dimension of the slit 28 is slightly larger than the outer diameter dimension of the rotating plate 24. Further, the shaft 22 is formed with a pair of screw holes 30, 30 extending in the radial direction so as to be orthogonal to the slit 28. The screw holes 30 and 30 have a length that does not penetrate the shaft 22 in this embodiment, but may penetrate the shaft 22. Further, a pair of pin insertion holes 31 and 32 are provided in both ends in the axial direction of the shaft 22 in the radial direction in substantially the same direction as the penetration direction of the slit 28.

  Then, the rotary plate 24 is inserted into the slit 28 of the shaft 22, and the valve body fixing screws 34, 34 are in a state where the screw holes 26, 26 of the rotary plate 24 and the screw holes 30, 30 of the shaft 22 are aligned. The rotating plate 24 is fixed to the shaft 22 by being inserted. Here, as shown in FIG. 5, the end surface of the head portion 36 of the valve body fixing screw 34 has a curved surface shape having a curvature substantially equal to that of the shaft 22, and thus the head portion 36 of the valve body fixing screw 34. Without protruding from the shaft 22 so as to be smoothly continuous with the outer peripheral surface of the shaft 22. Further, the valve body 20 configured as described above has a symmetrical shape in a side view when the rotating plate 24 is fixed in a state of passing through the diameter of the shaft 22.

  Then, both end portions of the shaft 22 of the valve body 20 configured as described above are inserted into and supported by a shaft support hole 38 formed in the peripheral wall of the exhaust pipe 12 and a bolt insertion hole 40 as a central through hole. Thus, the valve main body 20 is supported with respect to the exhaust pipe 12 so as to be rotatable about the central axis and not to be displaced in the direction perpendicular to the axis.

  Each of the shaft support hole 38 and the bolt insertion hole 40 is a through hole having a diameter substantially equal to the diameter of the shaft 22, and is formed at a position facing the exhaust pipe 12 in the radial direction. Thereby, the shaft 22 and the rotating plate 24 of the valve body 20 are arranged in a direction substantially orthogonal to the passage direction of the exhaust passage 18.

  In this way, the valve body 20 arranged on the exhaust passage 18 has a rotation shaft side that constitutes a rotation shaft side contact portion at the end of the shaft 22 on the side projected from the bolt insertion hole 40. A shaft side contact member 42 as a contact member is fixedly provided so as to be rotated integrally with the shaft 22. The shaft-side contact member 42 is made of stainless steel, and has a columnar portion 43 that extends in the axial direction with a substantially constant circular cross section, and a tapered portion 44 that is expanded in diameter in the axial direction. It has a thick circular block shape as a whole.

  The columnar portion 43 is formed with a shaft insertion hole 46 extending in a central axis shape with a diameter dimension substantially equal to the diameter dimension of the shaft 22. Note that the shaft insertion hole 46 in the present embodiment is formed with an axial dimension that is slightly larger than the axial dimension of the columnar portion 43 and slightly reaches the tapered portion 44. Further, a pin insertion hole 48 is provided in the cylindrical portion 43 in the radial direction. The diameter of the pin insertion hole 48 is substantially the same as the diameter of the pin insertion hole 31 in the shaft 22. On the other hand, the tapered portion 44 is formed with sawtooth-shaped locking teeth 50 over the entire circumference.

  Then, the shaft 22 is inserted into the shaft insertion hole 46 of the shaft side contact portion 42, and the pin insertion hole 48 of the shaft side contact member 42 and the pin insertion hole 31 of the shaft 22 are aligned, The shaft side contact member 42 is attached to the end portion of the shaft 22 so as to rotate integrally by inserting the fixing pin 52.

  Here, a linear mark 54 extending in the same direction as the pin insertion hole 48 is formed on the end surface of the shaft side contact member 42 on the tapered portion 44 side, and the shaft side contact member 42 is connected to the shaft 22. In this state, the extending direction of the mark 54 is set to be substantially the same as the extending direction of the rotating plate 24. Thereby, the rotation position of the valve body 20 can be recognized from the outside of the exhaust pipe 12, and in this embodiment, the mark 54 constitutes the rotation position display means. The mark 54 as the rotation position display means is not limited as long as it can indicate the spreading direction of the rotating plate 24. For example, the mark 54 is not limited to a linear shape, and an arrow shape or a triangular mark is engraved. Alternatively, a round mark may be engraved on the outer peripheral edge of the end face on the tapered portion 44 side. In addition, not only a certain mark but also a protruding mark may be formed.

  An exhaust pipe side contact member 56 constituting an exhaust pipe side contact portion is fixed to the outer peripheral surface of the exhaust pipe 12 via a cover member 58 at a position facing the shaft side contact member 42. Provided. The exhaust pipe side contact member 56 is made of stainless steel and has a substantially cylindrical block shape as a whole. Here, the end surface of the exhaust pipe side contact member 12 on the cover member 58 side is a curved surface that is curved in an arc shape in a side view along the outer peripheral surface of the cover member 58.

  Further, the through hole 60 penetrating on the central axis of the exhaust pipe side contact member 56 is formed with an inner diameter dimension slightly larger than the outer diameter dimension of the columnar portion 43 in the shaft side contact member 42. The end of the through hole 60 opposite to the cover member 58 has a tapered shape that is expanded in diameter toward the outside in the axial direction so as to correspond to the tapered portion 44 of the shaft-side contact member 42. In addition, a plurality of locking teeth 62 are formed on the inner peripheral surface over the entire circumference. In addition, on the end surface opposite to the cover member 58, marks 63 corresponding to the respective locking teeth 62 are engraved over a quarter of the locking teeth 62. In FIG. 3 and FIG. 8 to be described later, the locking teeth 62 are not shown and are simply displayed.

  The exhaust pipe side contact member 56 having such a structure is attached to the cover member 58. The cover member 58 is made of stainless steel, is curved so as to be along the outer periphery of the exhaust pipe 12, and is slightly longer than the length dimension of a later-described valve body insertion hole 70 formed in the exhaust pipe 12. It is a plate-like member having a vertical dimension.

  The cover member 58 is provided with a pair of screw holes 64, 64. On the other hand, a pair of screw holes 66 and 66 are also formed on the end surface of the exhaust pipe side contact member 56 that overlaps the cover member 58 (see FIG. 13). Then, in a state where the screw holes 64, 64 of the cover member 58 and the screw holes 66, 66 of the exhaust pipe side abutting member 56 are overlapped, the mounting screw 68 from the opposite side of the exhaust pipe side abutting member 56 of the cover member 58. , 68 are inserted, the exhaust pipe side contact member 56 and the cover member 58 are integrally fixed. Thus, in the present embodiment, the lid member is configured including the exhaust pipe side contact member 56 and the cover member 58.

  Further, the cover member 58 is provided with a shaft insertion hole 68 having a diameter substantially equal to the outer diameter of the shaft 22, and the shaft 22 is inserted into the shaft insertion hole 68 when attached to the exhaust pipe 12. It is designed to be inserted.

  The cover member 58 is attached to the outer peripheral surface of the exhaust pipe 12 so as to return the valve body insertion hole 70 penetrating the exhaust pipe 12. As shown in FIG. 6, the valve body insertion hole 70 penetrating the exhaust pipe 12 has a width dimension smaller than the diameter dimension of the bolt insertion hole 40, and is linear in substantially the same direction as the exhaust passage of the exhaust pipe 12. A pair of linear holes 72, 72 extending in the shape of the bolt are extended to both sides around the bolt insertion hole 40. Here, the linear holes 72, 72 have a longitudinal dimension slightly larger than the radial dimension of the rotating plate 24 and a width dimension slightly larger than the thickness dimension of the rotating plate 24. In short, the valve body insertion hole 70 includes the bolt insertion hole 40 and the straight holes 72, 72, and is formed with a substantially similar shape that is slightly larger than the side shape of the valve body 20, thereby The valve body 20 can be inserted into the exhaust pipe 12 from the outside through the body insertion hole 70.

  And the grooved bolts 74 and 74 are inserted in the longitudinal direction both ends of the valve body insertion hole 70 made into such a shape. FIG. 7 shows a grooved bolt 74. At the end of the threaded portion 76 of the grooved bolt 74 on the head 78 side, two parallel surfaces are formed as notched surfaces, and the surfaces are formed as grooves 80 and 80, respectively. Thus, a plate-like neck portion 82 is formed at the connection portion between the threaded portion 76 and the head portion 78 of the grooved bolt 74. Here, the width dimension W of the neck portion 82 in the screw shaft direction is slightly larger than the width dimension of the peripheral wall of the exhaust pipe 12, and the distance B between the bottom portions of the grooves 80 and 80 is the valve element insertion hole. 70 is slightly smaller than the width dimension of the linear hole 72. On the other hand, the diameter dimension of the screw portion 76 is larger than the width dimension of the linear hole 72. Further, the outer diameter dimension of the head portion 78 of the grooved bolt 74 is made smaller than the diameter dimension of the bolt insertion hole 40.

  Then, the grooved bolts 74, 74 are inserted from the head 78 into the bolt insertion hole 40 in the valve element insertion hole 70, and the neck 82 is inserted into the linear hole 72 along the linear hole 72. By being moved, grooved bolts 74 and 74 are positioned at both ends of the valve element insertion hole 70 with the threaded portion 76 protruding outward from the exhaust pipe 12. Here, the flat neck portion 82 is engaged with the peripheral wall of the exhaust pipe 12, so that the grooved bolts 74 and 74 are positioned so as not to rotate at both ends of the valve element insertion hole 70.

  In this way, the grooved bolts 74, 74 protruding at both ends of the valve element insertion hole 70 are inserted into the bolt insertion holes 84, 84 penetrating the cover member 58, and the cover member 58 is sandwiched between them. When the washers 86 and 86 and the nuts 88 and 88 are tightened, the cover member 58 and the exhaust pipe side contact member 56 attached to the cover member 58 are attached to the outer peripheral surface of the exhaust pipe 12. The entire valve element insertion hole 70 is covered with a cover member 58. In this embodiment, the grooved bolt 74 having the specific shape as described above is used as the mounting bolt. However, the mounting bolt prevents the valve body insertion hole 70 from falling into the exhaust pipe 12. In addition, any torque reaction force may be used as long as the nut 88 is tightened. For example, a caulking bolt may be used.

  In addition, between the cover member 58 and the exhaust pipe 12, the heat-resistant packing 90 formed from the material which has heat resistance, such as a fluororesin and a silicone resin, for example is arrange | positioned. The heat-resistant packing 90 has substantially the same shape as the valve element insertion hole 70, and has an inner diameter dimension substantially equal to that of the bolt insertion hole 40 at the center thereof and an outer diameter dimension larger than that of the bolt insertion hole 40. And a pair of linear portions 94, 94 extending linearly from the central annular portion 92 on both sides.

  Then, with the shaft 22 inserted through the central annular portion 92, the heat-resistant packing 90 is overlaid so as to return the valve element insertion hole 70 and is pressed against the outer peripheral surface of the exhaust pipe 12 by the cover member 58. It is done. Here, the longitudinal direction and the width direction dimensions of the linear portions 94, 94 are both formed with dimensions slightly larger than the longitudinal direction and width direction dimensions of the linear holes 72, 72 in the valve element insertion hole 70. Bolt insertion holes 95 and 95 are respectively provided at positions corresponding to the grooved bolts 74 in the linear portions 94 and 94. Then, in a state where the valve element insertion hole 70 and the heat-resistant packing 90 are overlapped, the grooved bolt 74 is projected through the bolt insertion holes 95 and 95. As a result, the leakage of the fluid flowing through the exhaust passage 18 can be suppressed by covering substantially the entire valve element insertion hole 70 with the heat-resistant packing 90.

  On the other hand, an operation member 96 is attached to an end of the shaft 22 that protrudes from the exhaust pipe 12 on the side opposite to the side on which the shaft side contact member 42 is provided. The operation member 96 has a structure in which a rod-shaped operation handle 100 is integrally attached to a rotating metal fitting 98 having a substantially circular block shape.

  The rotary fitting 98 is made of stainless steel, and a handle mounting portion 102 having a circular block shape and a cylindrical portion 104 having an outer diameter slightly smaller than the handle mounting portion 102 are integrally formed. Here, the inner diameter of the central hole 106 in the cylindrical portion 104 is substantially equal to the outer diameter of the shaft 22. The cylindrical portion 104 is formed with a pin insertion hole 108 penetrating in the radial direction. The diameter of the pin insertion hole 108 is the diameter of the pin insertion hole 32 formed at the end of the shaft 22. Are approximately equal.

  A rod-shaped operation handle 100 is attached to the handle attachment portion 102 of the rotary fitting 98. Here, the operation handle 100 is attached to the handle attachment portion 102 so that its extending direction is the same direction as the extending direction of the pin insertion hole 108, in other words, the direction perpendicular to the axis of the shaft 22. In addition, a heat-resistant tube 112 made of a heat-resistant material such as a fluororesin is attached to the operation handle 100 so as to cover the outer peripheral portion (see FIG. 2). Thereby, even when the operation handle 100 is in a high temperature state due to the influence of the heat of the exhaust pipe 12, it is easy to grip. The structure for attaching the operation handle 100 to the handle attachment portion 102 is not limited in any way. For example, the operation handle 100 may be welded, a screw is formed at the end of the operation handle 100, and the handle attachment portion 102 is screwed. A hole may be formed and the operation handle 100 may be screwed and fixed. Alternatively, the rotary fitting 98 and the operation handle 100 may be integrally formed.

  In the operation member 96 having such a structure, the cylindrical portion 104 is extrapolated to the end portion of the shaft 22, and the pin insertion hole 108 of the cylindrical portion 104 and the pin insertion hole 32 of the shaft 22 are aligned. When the fixing pin 110 is inserted in the state, it is fixed to the end portion of the shaft 22. Here, since the extending direction of the operation handle 100 is the same direction as the pin insertion hole 108 of the cylindrical portion 104, the operation handle 100 extends in a state where the operation member 96 is fixed to the shaft 22. The direction is set to be substantially the same as the spreading direction of the rotating plate 24.

  Further, a compression coil spring 114 as an axial force acting means is compressed in the axial direction between the opposed surfaces of the cylindrical portion 104 of the rotary fitting 98 fixed to the end of the shaft 22 and the outer peripheral surface of the exhaust pipe 12. It is arranged in a state of being swaged and extrapolated to the shaft 22. Thereby, the urging force of the compression coil spring 114 is in the axial direction of the shaft 22 and presses the shaft side contact member 42 against the exhaust pipe side contact member 56 against the valve body 20 (shaft 22). The locking teeth 50 of the shaft side contact member 42 and the locking teeth 62 of the exhaust pipe side contact member 56 are maintained in meshing state so that the shaft 22 is positioned so as not to rotate. It has become so. Thus, in the present embodiment, the engaging means and the locking means are configured including the locking teeth 50 of the shaft side contact member 42 and the locking teeth 62 of the exhaust pipe side contact member 56.

  In the present embodiment, an annular heat-resistant packing 116 is superimposed on the outer peripheral surface of the exhaust pipe 12 provided with the compression coil spring 114 while being inserted through the shaft 22 in the center hole thereof. In addition, a washer 118 is coaxially arranged and superimposed on the heat-resistant packing 116. The heat-resistant packing 116 is for suppressing leakage of fluid from the shaft support hole 38 penetrating the exhaust pipe 12, and is formed of a heat-resistant material such as fluorine resin or silicone resin. The urging force of the compression coil spring 114 is applied to the washer 118 (as a contact reaction force against the shaft 22), and the heat resistant packing 116 is pressed against the outer peripheral surface of the exhaust pipe 12 through the washer 118. Thus, sealing performance is ensured.

  In order to set the rotational position of the valve body 20 in the exhaust control valve 10 having such a structure, that is, to adjust the exhaust sound, first, an operator such as a user or a mechanic holds the operation handle 100. Then, a pressing operation is performed toward the exhaust pipe 12 side. As a result, as shown in FIG. 8, the valve body 20 is displaced relative to the direction in which the exhaust pipe side contact member 56 is provided against the urging force of the compression coil spring 114, and the shaft side contact is made. The engagement between the locking teeth 50 formed on the member 42 and the locking teeth 62 formed on the exhaust pipe side contact member 56 is released.

  Next, while maintaining the state in which the engagement between the locking teeth 50 in the shaft-side contact member 42 and the locking teeth 62 formed in the exhaust pipe-side contact member 56 is maintained, that is, the axial external force is applied to the shaft. The valve body 20 is rotated to a desired rotation position by rotating the operation handle 100 in a state where it is applied to the valve 22.

  Thereafter, the pressing operation by the axial external force on the operation handle 100 is stopped. As a result, the valve body 20 is relatively displaced toward the exhaust pipe 12 by the urging force of the compression coil spring 114, and the locking teeth 50 formed on the shaft side contact member 42 are moved to the exhaust pipe side contact portion 56. Engage with the formed locking teeth 62.

  In this way, the valve body 20 can be changed to a desired position and held at this position. Thereby, the passage sectional area of the exhaust pipe 12 can be adjusted, and the exhaust noise can be adjusted. As is clear from this, in the present embodiment, the rotation position setting holding means is configured including the shaft side contact member 42, the exhaust pipe side contact member 56, the compression coil spring 114, and the operation handle 100. Yes.

  In the exhaust control valve 10 having such a structure, the shaft side contact member 42 and the operation member 96 are attached to both ends of the shaft 22, and the shaft side contact member 42 and the exhaust pipe side contact member 56 are The compression coil spring 114 that maintains the engaged state is externally attached to the shaft 22, and members necessary for adjusting the exhaust noise can be compactly assembled on the same central axis as the shaft 22.

  In the exhaust control valve 10 having such a structure, it is possible not only to adjust the exhaust sound but also to change the output characteristics of the engine 14. That is, by reducing the inclination angle of the valve main body 20 (intersection angle of the surface of the rotary plate 24 with respect to the central axis of the exhaust pipe 12), the valve main body 20 is laid in the exhaust pipe 12, thereby improving exhaust efficiency and rotating at high speed. 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.

  And according to the exhaust control valve 10 in this embodiment, since it is possible to adjust the rotational position of the valve body 20 reliably and promptly by the simple operation as described above, the user himself can The rotational position of the valve body 20 can be changed.

  Next, a method for assembling the exhaust control valve 10 as described above will be described. First, as shown in FIGS. 9A and 9B, a positioning seal 120 is wound around a desired position of the exhaust pipe 12 in order to drill the shaft support hole 38 and the valve element insertion hole 70 in the exhaust pipe 12. Turn and stick.

  As shown in FIG. 10, the positioning seal 120 includes a long sheet-like mount 122 as a flexible sheet material, a shaft support hole mark 124 having the same shape as the shaft support hole 38, and a valve element insertion hole. The valve body insertion hole mark 126 having the same shape as 70 is formed.

  More specifically, the mount 122 has a vertical dimension larger than approximately half of the circumferential length of the outer diameter of the exhaust pipe 12 and a width dimension larger than the longitudinal dimension of the valve element insertion hole 70. ing. The mount 122 may be simple plain paper or the like, but more preferably, the adhesive sheet is formed on a part or the whole of the back surface and can be attached to the exhaust pipe 12.

  On the other hand, the shaft support hole mark 124 and the valve body insertion hole mark 126 are formed as through holes in which the mount 122 is penetrated in the shapes of the shaft support hole 38 and the valve body insertion hole 70, respectively. Here, the center of the shaft support hole mark 124 and the center of the bolt insertion hole portion 128 corresponding to the bolt insertion hole 40 in the valve element insertion hole mark 126 are positioned in a straight line in the longitudinal direction of the mount 122. In addition, the separation distance in the vertical direction of the mount 122 between the center of the shaft support hole mark 124 and the center of the bolt insertion hole 128 is set equal to the half circumference of the outer diameter of the exhaust pipe 12.

  Then, in a state where the positioning seal 120 is wound around the exhaust pipe 12 and fixed, the shaft support hole mark 124 and the valve element insertion hole mark 126 are painted from above with a magic or the like, whereby the shaft support hole mark 124 is provided on the exhaust pipe 12. The shape of the valve element insertion hole mark 126 is transferred. Thereby, the formation positions of the shaft support hole 38 and the valve body insertion hole 70 are displayed at the radial positions of the exhaust pipe 12.

  Next, the mount 122 is peeled off from the exhaust pipe 12, and cutting is performed using a cutting tool such as a drill or a saw according to the shape of the formation position of the shaft support hole 38 and the valve element insertion hole 70 displayed on the exhaust pipe 12. Thus, the shaft support hole 38 and the valve element insertion hole 70 are formed.

Here, when drilling the valve element insertion hole 70, for example, a cutting tool 132 shown in FIGS. 11 and 12 is preferably used. The cutting tool 132 has a structure in which a saw blade 136 is attached to a grip 134. Here, the width dimension W1 in the cutting direction of the blade portion 136 is made smaller than the diameter dimension of the bolt insertion hole 40 in the valve body insertion hole 70, and the width dimension W2 in the direction perpendicular to the cutting direction is W2 The width of the straight hole 72 in the insertion hole 70 is substantially the same.

  If such a cutting tool 132 is used, for example, after the bolt insertion hole 40 is drilled with a drill or the like, the blade portion 136 of the cutting tool 132 is inserted into the formed bolt insertion hole 40 and along the valve element insertion hole mark. Thus, the linear hole 72 can be easily formed.

  In addition, a mounting plate part 140 with bolt insertion holes 138 and 138 is formed in the blade part 136 of the cutting tool 132 and can be removed from the grip part 134 with bolts 142 and 142 and nuts 144 and 144. It is preferable that it is attached to. In this way, for example, when the blade portion 136 is lost, it is possible to replace only the blade portion 136, or the blade portion 136 can be detached from the grip portion 134 and attached to the electric tool. I can do it.

  As shown in FIG. 13, the members are assembled to the exhaust pipe 12 in which the shaft support hole 38 and the valve body insertion hole 70 are formed in this way.

  First, the exhaust pipe side contact portion 56 is attached to the cover member 58. As described above, the mounting is performed by attaching the mounting screws 68, 68 from the cover member 58 side in a state where the screw holes 64, 64 of the cover member 58 and the screw holes 66, 66 of the exhaust pipe side contact portion 56 are overlapped. Screw on with.

  Next, the end portion of the shaft 22 of the valve body 20 is inserted through the heat-resistant packing 90 and the shaft insertion hole 68 of the cover member 58 in this order, and protrudes outward of the exhaust pipe side contact portion 56. The valve body 20 shown in FIG. 13 is assembled in advance by the method shown in FIG.

  The shaft side contact member 42 is fitted into the end portion of the shaft 22 projected from the exhaust pipe side contact member 56, and the pin insertion hole 31 of the shaft 22 and the pin of the shaft side contact member 42 are inserted. The contact member 42 is attached to the end of the shaft 22 by inserting the fixing pin 52 in a state where the insertion holes 48 are aligned with each other. As a result, the cover member 58 and the valve body 20 are integrally attached.

  Subsequently, the grooved screws 74, 74 are inserted into the bolt insertion hole 40 of the valve body insertion hole 70 from the head 78, and the end of the linear hole 72 is engaged with the neck portion 82 engaged with the linear hole 72. Move to the part.

  Then, the valve body 20 is inserted into the valve body insertion hole 70 in a state where the spreading direction of the rotary plate 24 of the valve body 20 is aligned with the extending direction of the linear hole 72, thereby forming the pin insertion hole 32 of the shaft 22. The end portion on the side is inserted into the shaft support hole 38 of the exhaust pipe 12 and protruded to the outer peripheral side of the exhaust pipe 12. At the same time, the bolt insertion holes 84, 84 of the cover member 58 are inserted into the valve body insertion hole 70. The grooved bolts 74 and 74 that are projected are inserted. Thereafter, washers 86 and 86 and nuts 88 and 88 are fastened to the grooved bolts 74 and 74 from the cover member 58 side. Accordingly, the valve body 20 is supported by the shaft support hole 38 and the bolt insertion hole 40 and disposed inside the exhaust pipe 12, and the cover member 58 is fixed to the exhaust pipe 12.

  Next, the heat-resistant packing 116, the washer 118, and the compression coil spring 114 are extrapolated in this order with respect to the end of the shaft 22 protruding from the shaft support hole 38 of the exhaust pipe 12, and then the rotary fitting 98 is fitted. Extrapolate to insert. Then, in a state where the pin insertion hole 108 formed in the rotating metal fitting 98 and the pin insertion hole 32 formed in the shaft 22 are aligned, the fixing pin 110 is inserted, so that the rotating metal fitting is inserted into the end of the shaft 22. 98 is fixed. Thus, the assembly of the exhaust control valve 10 is completed.

  As is apparent from the above assembly method, the exhaust control valve 10 in this embodiment is an intermediate portion of the exhaust pipe 12 by inserting the valve body 20 from the valve body insertion hole 70 formed in the exhaust pipe 12. However, the exhaust control valve 10 can be assembled without cutting the exhaust pipe 12. As a result, there is no need to perform welding or the like, and even a general motorcycle user can perform the installation himself.

  In addition, since the exhaust control valve 10 according to the present embodiment can be easily removed from each member, it is also easy to replace the parts, and the maintainability can be improved.

  In order to mount the exhaust control valve 10 by the assembly as described above, the valve main body 20, the cover member 58, the shaft side contact member 42, and the exhaust pipe side contact member 56 shown in FIG. It is preferably provided as an assembly set including each component, positioning seal 120 and cutting tool 132. In this way, the exhaust control valve 10 can be attached without preparing a special member or tool separately. When providing an assembly set of the exhaust control valve, the above-described components may be provided in a preassembled state. That is, for example, in the above-described embodiment, the shaft 22 of the valve body 20 is inserted through the cover member 58 to which the exhaust pipe side contact member 56 is attached, and the shaft side contact member 42 is inserted into the protruding end portion of the shaft 22. May be provided in an assembled state.

  Further, for example, when providing as an assembly set of an exhaust control valve attached to a motorcycle, the shaft support hole mark 124 is used as the positioning seal 120 so as to be compatible with exhaust pipes of several widely used vehicle types. It is desirable to prepare a plurality of types with different separation distances between the valve body insertion hole mark 126 and the valve body insertion hole mark 126. Specifically, for example, several positioning seals 120 in which the separation distance between the shaft support hole mark 124 and the valve element insertion hole mark 126 is made different in advance are prepared, or one shaft support hole mark 124 is separated from each other. A positioning seal 120 in which a plurality of valve body insertion hole marks 126 having different distances are formed may be provided.

  As mentioned above, although one Embodiment of this invention was explained in full detail, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in this Embodiment.

  Hereinafter, several preferred configurations different from the above-described embodiment will be shown, but it should be understood that the present invention is not limited to the following specific configurations. In addition, in each structure described below, about the member substantially the same as the above-mentioned embodiment, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol as the above-mentioned embodiment.

  First, FIG. 14 shows a different aspect of the cover member 58. The cover member 58 in this aspect is formed by pressing a plate-like member made of stainless steel so that the inner side surface 148 has a curved surface shape along the outer peripheral surface of the exhaust pipe 12 as a whole. A flat portion 150 is formed at the central portion of the outer surface 149 opposite to the side surface so as to protrude to the opposite side of the exhaust pipe 12. Thereby, the end surface of the exhaust pipe side contact member 56 on the cover member 58 side is also a flat surface. As shown in FIG. 15, the flat portion 150 of the cover member 58 in this aspect has four screw insertion holes 152 formed at substantially equal intervals in the circumferential direction, while the exhaust pipe side contact member 56. The four screw holes 154 are formed at positions corresponding to the four screw insertion holes 152. Then, the exhaust pipe side contact member 56 is overlapped with the flat portion 140 of the cover member 58 and is screwed by a fixing screw 156, whereby the exhaust pipe side contact member 56 and the cover member 58 are attached. ing. In this way, the end surface of the exhaust pipe side contact member 56 on the cover member 58 side can be formed as a flat surface, and manufacture and attachment can be performed more easily.

  Further, if the shaft 22 can be rotated within a range of 0 ° to 90 °, the valve body 20 is fully opened (the cross-sectional opening area of the exhaust passage 18 is maximized) and fully closed (the exhaust passage 18). Therefore, it is possible to limit the rotation of the shaft 22 more than necessary by providing a rotation range limiting means for the shaft 22 as shown below, for example. It is.

  FIG. 16 and FIG. 17 illustrate one mode of the rotation range limiting means. In this embodiment, a circumferential groove 158 extending in the circumferential direction with a size of approximately 90 ° is formed at the end of the shaft side contact member 42 on the exhaust pipe side. On the other hand, in the exhaust pipe side contact member 56, a locking bolt insertion hole 160 is provided in a radial direction at a position overlapping the circumferential groove 158 in the radial direction, and the locking bolt insertion hole 160 has a locking bolt inserted in the locking bolt insertion hole 160. 162 is inserted from the outer peripheral side and fixed by screwing or welding. The distal end portion of the locking bolt 162 is projected from the inner peripheral surface of the exhaust pipe side contact member 56 and inserted into the circumferential groove 158 of the shaft side contact member 42. The axial width dimension of the circumferential groove 158 is such that the locking bolt 162 is in a state where the shaft side contact member 42 is displaced in the axial direction in order to release the engagement state with the exhaust pipe side contact member 56. Is formed with an axial width dimension capable of maintaining the inserted state.

  As a result, when the shaft 22 is rotated and the shaft-side contact member 42 is rotated, the circumferential edge of the circumferential groove 158 is locked to the locking bolt 162, whereby the shaft The rotation range of 22 is limited. Thus, in this aspect, the rotation range limiting means is configured including the circumferential groove 158 and the locking bolt 162. In this way, the rotation range limiting means of the shaft 22 can be configured by slightly changing the structure of the shaft 22 and the exhaust pipe side contact member 56 in the above-described embodiment. In contrast to this embodiment, the exhaust pipe side contact member 56 may be provided with a circumferential groove 158 and the shaft side contact member 42 may be provided with a locking bolt 162.

  Further, FIGS. 18 and 19 exemplify further different modes of the rotation range limiting means. In this aspect, a locking metal fitting 164 for limiting the rotation range of the operation handle 100 is provided as the rotation range limiting means. The locking fitting 164 is a substantially cylindrical member having an opening 166 that opens upward, and protrudes from the outer peripheral surface of the exhaust pipe 12 so as to surround the shaft 22 on the side to which the operation handle 100 is attached. Arranged. Here, the opening dimension of the opening 166 is set to approximately 90 ° in the circumferential direction of the locking metal fitting 164. Further, a drain hole 167 is provided through the bottom of the locking metal fitting 164.

  Such a locking metal fitting 164 is preferably attached to the exhaust pipe 12 using, for example, a structure substantially similar to that of the cover member 58 described above. That is, the attachment plate portion 168 having substantially the same shape as that of the cover member 58 is formed at the end of the engagement fitting 164 on the exhaust pipe 12 side by integrally molding or welding a separate plate member. On the other hand, the shaft support hole 38 in the exhaust pipe 12 is formed in the same shape as the valve element insertion hole 70, and the grooved bolts 74, 74 are inserted and the grooved bolts 74, 74 are used to attach the mounting plate portion. By fixing 168 to the exhaust pipe 12, the locking fitting 164 can be attached to the exhaust pipe 12. In addition, you may weld directly to the exhaust pipe 12, without going through the attachment plate member 168.

  Then, the operation handle 100 is locked to the edge of the opening 166 in the locking metal fitting 164, so that the rotation amount of the operation handle 100 is limited, so that the rotation amount of the shaft 22 is limited. It has become. In this embodiment, the extending direction of the operating handle 100 and the expanding direction of the rotating plate 24 are slightly different from each other, and the expanding direction of the rotating plate 24 at one rotational end position of the operating handle 100 shown in FIG. Is substantially parallel to the flow path direction, and is substantially perpendicular to the flow path direction at the other rotational end position.

  In this way, since the user can visually recognize that the rotation of the operation handle 100 itself is restricted, the rotatable range of the shaft 22 can be visually recognized. In addition, the specific shape of the locking metal fitting 164 in this aspect is an illustration to the last, and it cannot be overemphasized that various shapes are employable suitably. For example, the locking metal fitting 164 is not necessarily formed of a single member, and locking protrusions for locking the operation handle 100 may be provided at both rotation end positions of the operation handle 100, respectively.

  In the above-described embodiment, the user exerts an external force directly on the shaft 22, and the shaft side contact member 42 and the exhaust pipe side contact member 56 against the urging force of the compression coil spring 114. However, it is possible to provide an axial force releasing means for applying an axial force to the shaft 22 in the direction opposite to the urging force of the compression coil spring 114. .

  For example, one mode as an axial force releasing means is shown in FIG. 20 as a model. In this embodiment, a support metal fitting 170 having a substantially box shape opening upward is attached to the outer peripheral surface of the exhaust pipe 12 on the handle attachment portion 102 side so as to surround the handle attachment portion 102. The support fitting 170 is fixed to the outer peripheral surface of the exhaust pipe 12 by, for example, bolts, welding or the like in the same manner as the above-described locking fitting 164. A nut 174 is fixed to the outer side of the outer wall surface 172 located on the opposite side of the exhaust pipe 12 with the handle mounting portion 102 sandwiched between the support fitting 170 by welding or bonding. A pressing bolt 176 is screwed.

  The pressing bolt 176 has a structure in which a bolt-shaped portion 178 and a base end portion 180 are integrally formed. The base end portion 180 has a rod-shaped operation lever 182 extending in the radial direction of the bolt-shaped portion 178. Is provided. The pressing bolt 176 having such a structure is disposed on the substantially same central axis as the shaft 22 by screwing the bolt-shaped portion 178 to the nut 174 from the outside, and tightens the bolt-shaped portion 178. As a result, the shaft 22 can be displaced in the axial direction.

  Then, when the user grips the operation lever 182 and rotates the pressing bolt 176, the pressing bolt 176 is displaced toward the handle mounting portion 102 by screwing the bolt-shaped portion 178 and the nut 174. As a result, the tip of the bolt-shaped portion 178 abuts on the handle attachment portion 102 and a force in the pushing direction is exerted on the handle attachment portion 102. As a result, the shaft 22 can be displaced in the axial direction against the urging force of the compression coil spring 114. Thus, in this aspect, the axial direction releasing means is configured including the support fitting 170 and the pressing bolt 176.

  In this way, the handle mounting portion 102 can be pushed in by tightening the pressing bolt 176, so that the shaft 22 is displaced in the axial direction with a smaller force than when the handle mounting portion 102 is pushed directly. It can be shown. Then, the shaft 22 is displaced in the axial direction, and the operation handle 102 is operated in a state where the engagement between the shaft side contact member 42 and the exhaust pipe side contact member 56 is released. Is adjusted, the shaft 22 is displaced in the urging direction of the compression coil spring 114 by loosening the pressing bolt 176, and the shaft side contact member 42 and the exhaust pipe side contact member 56 are engaged again. I can do it.

  Further, different modes as the axial force releasing means are shown in FIGS. 21 and 22 as models. In this embodiment, a conical shape that is reduced in diameter toward the outer side in the axial direction of the shaft 22 and protrudes into a substantially truncated cone shape on the surface opposite to the exhaust pipe 12 of the handle mounting portion 102. A protrusion 184 is formed. Further, on the outer peripheral surface of the exhaust pipe 12, a support fitting 186 having a substantially box-like shape that is open upward is attached to the structure substantially the same as the above-described embodiment. A contact plate member 190 is attached to the handle attachment portion 102 side of the outer wall portion 188 of the support fitting 186 so as to be movable up and down. The contact plate member 190 has a plate shape in which an operation portion 194 extending outward and a contact portion 196 extending toward the exhaust pipe 12 are integrally formed at upper and lower ends of the sliding portion 192 extending in the vertical direction. It is made a member. The abutting plate member 190 is attached to the support metal fitting 186 so as to move up and down by inserting the sliding portion 192 into the flange-shaped portion 198 provided on the outer wall portion 188. The width dimension of the contact portion 196 of the contact plate member 190 is slightly smaller than the diameter dimension of the handle mounting portion 102. Further, the contact plate member 190 is arranged such that the end edge portion on the handle attachment portion 102 side of the contact portion 196 does not extend to the shaft 22 side from the conical protrusion 184.

  Then, when the user grasps the grip portion 194 of the contact plate member 190 and displaces the contact plate member 190 upward, the contact portion 196 is brought into contact with the conical protrusion 184 and further contacted. By displacing the portion 196 upward, a force in the pushing direction is exerted on the handle attachment portion 102 by the guiding action of the abutting portion 196 and the conical protrusion 184. As a result, the shaft 22 can be displaced in the axial direction against the urging force of the compression coil spring 114. Thus, in this aspect, the axial direction releasing means is configured including the conical protrusion 184, the support fitting 186, and the contact plate member 190.

  In this way, the engagement state of the shaft side contact member 42 and the exhaust pipe side contact member 56 can be easily and quickly released by a simple operation of displacing the contact plate member 190 upward. . After the engagement of the shaft side contact member 42 and the exhaust pipe side contact member 56 is released, the operation handle 102 is operated to adjust the rotational position of the rotary plate 24, and then the contact plate member By lowering 190, the shaft 22 can be displaced in the urging direction of the compression coil spring 114, and the shaft side contact member 42 and the exhaust pipe side contact member 56 can be engaged again.

  FIG. 23 and FIG. 24 schematically show still another aspect of the axial force releasing means. In this aspect, a conical protrusion 184 is formed on the handle attachment portion 102 and the support fitting 200 is attached so as to surround the handle attachment portion 102, as in the above embodiment. A contact rod 204 is rotatably attached to the outer wall portion 202 of the support fitting 200.

  The contact rod 204 has a shape in which a rod-shaped grip portion 206 and a rod-shaped contact portion 208 bent in an L-shape are integrally connected. It is attached to be able to rotate. Here, the length dimension of the grip portion 206 in the extending direction from the pin 210 is set longer than the length dimension of the contact portion 208 in the extending direction from the pin 210. The grip 206 is protruded outward of the support fitting 200 through a slit 212 penetrating the support fitting 200, and the slit 212 has a length in the vertical direction that does not hinder the rotation of the contact rod 204. It is formed with a height.

  When the operator grips the grip portion 206 and rotates it downward, the contact portion 208 comes into contact with the conical protrusion 184, and further, when the grip portion 206 rotates further downward, the contact portion 208 comes into contact. Due to the guiding action of the portion 208 and the conical protrusion 184, a force in the pushing direction is exerted on the handle attachment portion 102. Thus, in this aspect, the axial direction release means is configured including the conical protrusion 184, the support fitting 200, and the contact rod 204.

  As a result, the shaft 22 can be displaced in the axial direction against the urging force of the compression coil spring 114. In this way, the contact rod 204 can be used by levering, and the engagement state between the shaft side contact member 42 and the exhaust pipe side contact member 56 can be easily and quickly released with a smaller force. I can do it. Then, after adjusting the rotational position of the rotating plate 24 by operating the operation handle 102 in a state where the engagement between the shaft side contact member 42 and the exhaust pipe side contact member 56 is released, the contact rod 204 is adjusted. By rotating the shaft upward, the shaft 22 can be displaced in the urging direction of the compression coil spring 114, and the shaft side contact member 42 and the exhaust pipe side contact member 56 can be engaged again.

  In the above-described embodiment, the shaft 22 is supported by the shaft support hole 38 and the bolt insertion hole 40 formed in the exhaust pipe 12. However, the through hole formed in the exhaust pipe 12 is not necessarily provided. There is no need to be supported by. For example, as shown in FIGS. 25 and 26 as a model, the shaft support hole 38 is formed to be slightly larger than the diameter of the shaft 22, and the roller bearing is coaxial with the shaft support hole 38 on the outer peripheral surface of the exhaust pipe 12. A bearing 214 may be provided, and the shaft 22 may be supported by the bearing 214.

  The bearing 214 is a substantially annular member including a plurality of (six in this embodiment) spheres 216. Specifically, the bearing 214 has a structure in which the outer guide cover 220 is attached so as to cover the outer peripheral surface of the inner guide cover 218. The inner guide cover 218 is a substantially annular member having a substantially rectangular cross-sectional shape, and there are a plurality of sphere insertion holes 222 slightly larger than the diameter of the sphere 218 on the outer peripheral surface (in this embodiment, six On the other hand, a spherical exposure port 224 is opened at a portion of the inner peripheral surface facing the spherical insertion port 222 in the radial direction. Then, the sphere 216 is inserted from the sphere insertion port 222, and the external guide cover 220 is fixed from the outer periphery. Accordingly, the sphere 216 is rotatably arranged in the internal guide cover 218 in a state where the sphere 216 is projected from the inner peripheral surface of the internal guide cover 218. Further, the opposing distance in the radial direction of these spheres 216 (the distance between the points located on the innermost side of the spheres 216 and 216 positioned to oppose each other in the radial direction of the bearing 214) is the radial dimension of the shaft 22. It is made to become substantially equal.

  The bearing 214 having such a structure is fixed so as to be fitted into a cylindrical mounting tube portion 226 fixed to the outer peripheral surface of the exhaust pipe 12 by welding or the like. In this embodiment, a heat-resistant packing 228 is disposed between the bearing 214 and the outer peripheral surface of the exhaust pipe 12 to suppress fluid leakage from the shaft support hole 38. The heat-resistant packing 228 is a substantially cylindrical member made of a heat-resistant material such as a fluororesin, for example. The inner diameter of the heat-resistant packing 228 is substantially equal to the diameter of the shaft 22, and the exhaust pipe 12 The end face 230 on the side is curved so as to follow the outer peripheral surface of the exhaust pipe 12. The shaft 22 is supported by a sphere 216 that protrudes from the inner peripheral surface of the bearing 214. Here, since the shaft support hole 38 is formed to be slightly larger than the diameter of the shaft 22, the shaft 22 in this embodiment is inserted into the shaft support hole 38 in a non-contact state over the entire circumference. It has been. In this way, when the shaft 22 is displaced in the axial direction, the shaft support hole 38 is prevented from rubbing and interfering, and the sphere 216 is rotated, so that the shaft 22 is smoothly displaced. It can be shown.

  As is clear from this, the shaft 22 is not necessarily supported directly by the exhaust pipe 12. Therefore, for example, the bolt insertion hole 40 is formed larger than the diameter dimension of the shaft 22, and a support hole having a diameter dimension equal to that of the shaft 22 is formed in the cover member 58 to support the cover member 58. A bearing 214 may be provided and supported.

  Further, the assembly structure of the valve body is not limited at all. For example, FIGS. 27 and 28 show different assembly structures of the valve body. In the rotating plate 24 in this embodiment, a pair of protrusions 232 and 232 are formed on both sides with a raised structure by pressing or the like. Here, the pair of projecting portions 232 and 232 are formed with the diameter of the rotating plate 24 interposed therebetween, and are cut and raised toward the opposite direction on the center side. Further, the separation distance D between the pair of protrusions 232 and 232 is substantially equal to the diameter of the shaft 22. Then, the rotating plate 24 having such a structure is inserted into the slit 28 of the shaft 22 (FIG. 28A). Here, when the shaft 22 is bent, one of the projecting portions 232 and 232 facing each other on the rotating plate 24 is inserted through the slit 28, and the shaft 22 is cut and raised between these projecting portions 232 and 232. It is locked against. Thereby, the rotary plate 24 is assembled to the shaft 22 and the valve body 20 is assembled (FIG. 28B). This eliminates the need for screw tightening and facilitates assembly of the valve body 20.

  Furthermore, the valve body 20 does not necessarily need to be configured with the rotating plate 24 and the shaft 22 as separate bodies. For example, a pair of semicircular plate members corresponding to the rotating plate 24 are formed with a diameter of the shaft 22. The valve body 20 may be configured integrally by welding to both sides in the direction, or by integrally forming the rotating plate 24 and the shaft 22.

  Further, in order to adjust exhaust noise and exhaust efficiency, a through hole having an appropriate size and shape may be formed in the rotating plate 24. Thereby, the path cross-sectional area of the exhaust pipe 12 can be adjusted with higher accuracy. According to the present invention, since the rotation plate 24 can be easily inserted into and extracted from the exhaust pipe 12, for example, a general user of a motorcycle can check the actual exhaust noise and exhaust efficiency while checking the actual exhaust sound and exhaust efficiency. It is also possible to adjust the size of.

  Furthermore, the specific structure of the operation handle is not limited at all. For example, an operation handle 234 as a different mode is illustrated in FIGS. 29 and 30 as a model. The operation handle 234 has a circular block-shaped gripping member 236 attached to the end of the shaft 22. The gripping member 236 has a shape such that the operation handle 100 of the handle attachment portion 102 described above is removed, and is attached to the end portion of the shaft 22 by a fixing pin 110 in the same manner as the handle attachment portion 102. The outer end face of the grip member 236 is covered with a heat-resistant cover 238 made of a heat-resistant fluororesin or rubber material and adapted to the shape of the grip member 236. The heat-resistant cover 238 may be coated directly on the gripping member 236 with a fluororesin or rubber material, or a resin plate formed from these materials may be adhered to the outer surface of the gripping member 236 by adhesion or the like. Also good.

  The gripping member 236 and the heat-resistant cover 238 are formed with a pair of marks 240 and 240 extending in the radial direction and penetrating in the thickness direction, and the extending direction of the marks 240 and 240 is the extension of the gripping member 236. In the state of being attached to the shaft 22, the direction of rotation of the rotary plate 24 is substantially the same. Thereby, the rotation position of the rotating plate 24 can be confirmed from the outside.

  In this way, since there is no protruding member such as an operation lever, the size of the operation handle can be reduced, and the possibility of hindering the rotation of the lever by surrounding members or the like is reduced. The degree of freedom in setting the position of the control valve can be improved. Further, in this aspect, when adjusting the rotational position of the rotating plate 24, the palm and shaft that exert a pressing force on the gripping member 236 by gripping the entire operation handle 234 and pushing it into the exhaust pipe 12 side. Since 22 is positioned substantially coaxially, an axial acting force can be effectively exerted on the shaft 22.

  In addition, the valve body insertion hole 70 is preferably substantially similar in shape to be slightly larger than the side surface shape of the valve body 20 in order to suppress leakage of fluid from the exhaust pipe 12, but is not necessarily limited to that of the valve body 20. It is not necessary to be similar to the side shape, and it may be formed in a rectangular shape or the like with a sufficiently large opening size into which the valve body 20 can be inserted.

  Further, as exemplified in FIG. 31, the reinforcing members 242 and 242 are inserted into the shaft support hole 38 and the bolt insertion hole 40, respectively, and the shaft 22 is supported by the reinforcing members 242 and 242. Also good. In this way, the edges of the shaft support hole 38 and the bolt insertion hole 40 are reinforced, and the risk of damaging the exhaust pipe 12 when the exhaust control valve according to the present invention is assembled to the thin exhaust pipe 12 is reduced. I can do it. Furthermore, since the opening through which the shaft 22 is inserted is formed with higher accuracy, the shaft 22 can be rotated more smoothly.

  Furthermore, for example, as schematically illustrated in FIG. 32, after an exhaust control valve having a structure according to the present invention is attached to a tube body 244 having an appropriate diameter in advance, both ends of the tube body 244 are arranged. The portions 246 and 248 may be formed by connecting to the existing exhaust pipe 250 or the muffler 252 with an outer diameter dimension that can be inserted or inserted by lathe processing or the like. Thus, an exhaust pipe is configured including the exhaust pipe 250, the muffler 252 and the pipe body 244, and an exhaust control valve according to the present invention can be attached to an intermediate portion of the exhaust pipe.

  In addition, in the embodiment shown in FIGS. 2 to 3, the engaging teeth 50 of the shaft side contact member 42 and the engaging teeth 62 of the exhaust pipe side contact member 56 constituting the engaging means and the engaging means are As long as it constitutes an engaging mechanism that can position the shaft 22 at a plurality of positions around the central axis by engaging each other in the direction, only the tapered surfaces corresponding to each other as shown in the embodiment However, the structure is not limited to the structure in which the locking teeth 50 and 62 are formed. For example, locking teeth that extend in the axial direction may be formed on the cylindrical outer peripheral surface and inner peripheral surface that do not have a taper. Further, the locking teeth 50 and 62 are formed to extend over the entire length in the axial direction between the outer peripheral surface of the shaft side contact member 42 and the inner peripheral surface of the through hole 60 of the exhaust pipe side contact member 56. May be.

  Furthermore, in the embodiment shown in FIGS. 2 to 3, for example, the mode shown in FIGS. 33 and 34 is preferable as the mounting structure of the compression coil spring 114 that urges the shaft 22 in the protruding direction toward the operation handle 100. Adopted. That is, in the illustrated embodiment, the bottomed central hole 106 into which the shaft 22 is fitted has a stepped inner peripheral surface shape in the rotary fitting 98 that is externally fitted to the protruding tip portion of the shaft 22 and is fixed by the fixing pin 110. It is said that. A step surface 260 is formed in the intermediate portion of the central hole 106 in the depth direction, and the opening side of the central hole 106 has a larger diameter than the bottom side. The tip of the shaft 22 is fitted on the bottom side of the small diameter of the central hole 106, while the end of the compression coil spring 114 is fitted on the large diameter opening side of the central hole 106. Thereby, the compression coil spring 114 is positioned and held coaxially with the shaft 22, and problems such as rattling of the compression coil spring 114 and interference with the shaft 22 can be avoided.

  Also, as shown in FIGS. 2 to 3, in the embodiment, the locking teeth 50 and 62 of the shaft side contact member 42 and the exhaust pipe side contact member 56 are guided to their engagement positions in the circumferential direction. Therefore, it is also possible to employ a moderation mechanism as shown in FIGS. 35 to 36, for example. In particular, in the moderation mechanism shown in FIGS. 35 to 36, the locking teeth 62 are formed over the entire length in the axial direction on the inner peripheral surface of the through hole 60 of the exhaust pipe side contact member 56. The teeth 62 are skillfully used. More specifically, the shaft-side abutting member 42 includes a large-diameter disk-shaped head portion 266 in which the locking teeth 50 are formed, and a small-diameter rod portion extending inward in the axial direction from the head portion 266. 268 is integrally provided. In a state where the head portion 266 of the shaft side contact member 42 enters the through hole 60 of the exhaust pipe side contact member 56 and the locking teeth 50 and 62 are locked, the rod portion 268 is also in the through hole 60. It is designed to enter and be positioned. The rod portion 268 is provided with a spring accommodating hole 270 that extends in the radial direction and opens on the outer peripheral surface, and an engaging ball 272 is disposed in the opening portion of the accommodating hole 270. Further, the engaging ball 272 is always urged outward by an urging spring 274 accommodated in the accommodation hole 270. Under such a biased state, the engaging ball 272 is partially engaged with and engaged with the opening of the accommodation hole 270, and another part is a through hole of the exhaust pipe side contact member 56. The engaging teeth 62 are fitted into the grooves of the engaging teeth 62 formed on the inner peripheral surface of the engaging member 60. Further, when the shaft 22 (not shown) is forcibly rotated under such an engagement state, the engagement ball 272 is displaced so as to enter the accommodation hole 270 against the urging force of the urging spring 274. Thus, the locking tooth 62 of the exhaust pipe side contact member 56 is overcome, and the shaft side contact member 42 is allowed to rotate. When the engagement ball 272 is moved over the locking tooth 62, a feeling of moderation with respect to the rotation operation of the shaft 22 can be expressed, and the engagement ball 272 is locked based on the biasing force of the biasing spring 274. Based on the action guided to the position where the tooth 62 fits into the groove, the locking teeth 50 and 62 of the shaft side contact member 42 and the exhaust pipe side contact member 56 are moved to their engagement positions. The function of guiding each other in the direction is exhibited. By such a circumferential guide action, it is possible to effectively avoid catching at the time of fitting after the shaft side contact member 42 is detached from the through hole 60 of the exhaust pipe side contact member 56 in the axial direction. Become. The engagement state of the engagement ball 272 with the locking tooth 62 is always in a state where the shaft side contact member 42 is protruded and detached from the through hole 60 of the exhaust pipe side contact member 56 in the axial direction. It is supposed to be kept.

  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.

Schematic which shows the exhaust pipe provided with the exhaust control valve as 1st embodiment. The perspective view which shows the exhaust control valve | bulb as 1st embodiment. FIG. 3 is a cross-sectional view of the exhaust control valve shown in FIG. 2. Explanatory drawing which shows the assembly | attachment structure of a valve member. Sectional drawing of a valve member. The side surface model figure which shows a valve body insertion hole. The side view which shows a mounting bolt. FIG. 4 is a cross-sectional view showing a state in which an axial acting force is exerted on a rotating shaft in FIG. 3. Explanatory drawing for demonstrating a mode that a positioning sheet is wound. The top view of a positioning sheet. The side view of a cutting tool. The front view of the cutting tool shown in FIG. The exploded perspective view of an exhaust control valve. Explanatory drawing which shows the aspect from which a cover member differs. The front view of the cover board member shown in FIG. Explanatory drawing for demonstrating the one aspect | mode of a rotation range restriction | limiting means. Explanatory drawing for demonstrating the rotation range restriction | limiting means shown in FIG. Explanatory drawing for demonstrating the different aspect of a rotation range limitation means. Explanatory drawing for demonstrating the rotation range limitation means shown in FIG. Explanatory drawing for demonstrating the one aspect | mode of an axial direction force cancellation | release means. Explanatory drawing for demonstrating the different aspect of an axial direction force cancellation | release means. Explanatory drawing for demonstrating the axial direction force cancellation | release means shown in FIG. Explanatory drawing for demonstrating the different aspect of an axial direction force cancellation | release means. Explanatory drawing for demonstrating the axial direction force cancellation | release means shown in FIG. Explanatory drawing for demonstrating a roller bearing. Explanatory drawing for demonstrating the roller bearing shown in FIG. Explanatory drawing for demonstrating the assembly structure from which a valve member differs. Explanatory drawing for demonstrating the valve member shown in FIG. Explanatory drawing which shows the aspect from which an operation handle differs. Explanatory drawing for demonstrating the operation handle shown in FIG. Explanatory drawing which shows a reinforcement member. Explanatory drawing which shows an insertion pipe body. The perspective view which shows another aspect of an operation handle. The longitudinal cross-sectional view which shows the attachment state of the operation handle shown by FIG. The disassembled perspective view which shows another aspect of a rotation position setting holding means. FIG. 36 is a cross-sectional view of the assembled state of the rotational position setting holding means shown in FIG.

Explanation of symbols

10: exhaust control valve, 12: exhaust pipe, 22: shaft, 24: rotating plate, 38: shaft support hole, 42: shaft side contact member, 56: exhaust pipe side contact member, 58: cover member, 70: Valve body insertion hole, 74: grooved bolt, 114: compression coil spring

Claims (22)

In the exhaust control valve provided on the exhaust passage of the exhaust pipe,
A shaft support hole formed at one position facing in one radial direction on the peripheral wall of the exhaust pipe;
A longitudinal valve body insertion hole formed at the other position;
A plate-shaped valve body having a rotation shaft is configured to be inserted into the exhaust pipe from the valve body insertion hole, and the rotation shaft is opposed to the shaft support hole and the valve body insertion hole. A valve member rotatably disposed in the exhaust pipe in a state extending in a direction perpendicular to the axis
A lid member that is overlapped and fixed to the exhaust pipe from outside, and covers the valve element insertion hole;
An exhaust control valve comprising: a rotation position setting holding means for positioning the rotation position of the rotation shaft so as to be changeable.   The rotating shaft of the valve member is disposed through at least one axial end of the exhaust pipe through the exhaust pipe, and an operation handle is attached to the rotary shaft that protrudes outside through the exhaust pipe. The exhaust control valve according to claim 1, wherein the exhaust control valve is provided.   The rotation shaft of the valve member is disposed through the exhaust pipe at at least one axial end, and the rotation shaft penetrated through the exhaust pipe rotates with respect to the exhaust pipe. The exhaust control according to claim 1 or 2, wherein a locking means for positioning the position at a plurality of positions around the central axis is provided, and the rotation position setting holding means is constituted by the locking means. valve.   The exhaust control valve according to claim 3, wherein the rotation shaft is positioned with respect to the lid member fixed to the exhaust pipe by the locking means. An end of the rotating shaft opposite to the lid member is protruded to the outside through the exhaust pipe, and an operation handle provided at a protruding portion of the rotating shaft;
A rotation shaft side contact portion and an exhaust pipe side contact portion that are formed at corresponding positions of the rotation shaft and the lid member and are brought into contact with each other by displacement of the rotation shaft in one axial direction. When,
An engagement between the rotation shaft side contact portion and the exhaust pipe side contact portion that can be engaged and disengaged in the axial direction of the rotation shaft and prevents relative rotation in the circumferential direction at a plurality of positions by engagement. And
Axial force acting means for applying an axial force to the pivot shaft with respect to the direction in which the pivot shaft side abutting section is pressed against the exhaust pipe side abutting section,
By utilizing the state in which the rotation-axis-side abutting portion is pressed against the exhaust pipe-side abutting portion by the axial force acting unit, the engagement unit is brought into an engagement state, whereby the rotation shaft is moved to a predetermined state. While holding the rotating position, releasing the pressing of the rotating shaft side abutting portion against the exhaust pipe side abutting portion and releasing the engaging means, the rotating handle rotates the rotating shaft. The exhaust control valve according to any one of claims 1 to 4, wherein the rotation position setting and holding means is configured by making the position changeable.   By selectively applying an axial force to the rotation shaft in a direction opposite to the pressing direction of the rotation shaft side contact portion to the exhaust pipe side contact portion by the axial force acting means. An axial force release means for displacing the pivot shaft in the axial direction against the axial force by the axial force acting means and holding the engagement means in the pivot position setting holding means in a disengaged state. The exhaust control valve according to claim 5 provided.   The exhaust control valve according to any one of claims 1 to 6, further comprising a roller bearing that rotatably supports the rotation shaft of the valve member with respect to the exhaust pipe.   The exhaust control valve according to any one of claims 1 to 4, further comprising a rotation position display means for recognizing the spreading direction of the valve body from the outside of the exhaust pipe.   The exhaust control valve according to any one of claims 1 to 8, further comprising a rotation range limiting unit that limits a rotation range of the rotation shaft around a central axis with respect to the exhaust pipe.   The rotary shaft and the valve body are formed separately, and a slit-like valve body insertion hole extending in the axial direction is provided in the rotational shaft so as to form a plate-like valve plate member as the valve body The exhaust control valve according to any one of claims 1 to 9, wherein the valve member is configured by inserting and fixing the valve member into the valve body insertion hole.   While the opening width dimension of the valve element insertion hole is partially increased to form a bolt insertion hole, the head side end of the screw portion having a diameter larger than the opening width dimension of the valve element insertion hole A mounting bolt is used in which a notch surface is formed and the outer diameter dimension of the notch surface is smaller than the opening width dimension of the valve body insertion hole, and the head of the mounting bolt is the valve The threaded portion of the mounting bolt is inserted into the valve element insertion hole at a position where the notch surface is formed at a position where the bolt insertion hole is inserted into the exhaust pipe from the bolt insertion hole of the body insertion hole. The threaded portion of the threaded portion is locked to the opening edge of the valve body insertion hole so that displacement in the bolt center axis direction and rotation around the bolt center axis are prevented. A portion protruding outward from the exhaust pipe, and the exhaust pipe of the screw portion Exhaust control valve according to any one of claims 1 to 10 wherein the lid member is fixed to the exhaust pipe by screwing the nuts clamping the projecting portions of al.   In the exhaust pipe, the bolt insertion hole is formed at a position facing the shaft support hole in the radial direction of the exhaust pipe, and both ends of the rotating shaft are formed by the bolt insertion hole and the shaft support hole. The exhaust control valve according to claim 11, which is rotatably supported.   Cylindrical reinforcing members are respectively assembled to the bolt insertion holes and the shaft support holes penetrating the exhaust pipe, and both ends of the rotating shaft are interposed by the exhaust pipe via the reinforcing members. The exhaust control valve according to claim 12, which is rotatably supported.   The inner surface of the exhaust pipe is overlapped with the outer peripheral surface of the curved surface along the outer peripheral surface of the exhaust pipe, and the outer surface opposite to the inner side surface extends in a direction perpendicular to the rotation axis. Exhaust pipe side abutment that uses a cover plate member having a flat surface and configures the rotation position setting holding means to position the rotation position of the rotation shaft with respect to the flat surface of the cover plate member The exhaust control valve according to claim 2, wherein the lid member is configured by fixing the member.   The rotating shaft of the valve member is protruded outward from the exhaust pipe, and a rod protruding in a direction perpendicular to the axis of the rotating shaft is provided at the protruding portion, and the rod is a heat insulating material. The exhaust control valve according to claim 2, wherein the operation handle is configured by being covered with a valve.   The exhaust pipe is divided at an intermediate portion on the exhaust passage, and the exhaust pipe is continuous by connecting both side portions of the exhaust pipe separated by inserting the insertion pipe body at the divided portion. The exhaust control according to any one of claims 1 to 15, wherein the valve member is incorporated by forming the valve body insertion hole in the insertion pipe body. valve. After forming a shaft support hole at one position opposed in one radial direction on the peripheral wall of the exhaust pipe and forming a long valve body insertion hole at the other position opposite to the shaft support hole,
A valve member configured to include a plate-shaped valve body having a rotation shaft is inserted into the exhaust pipe from the valve body insertion hole, and one end of the rotation shaft is inserted into the shaft support hole. Fitted into the exhaust pipe,
Then, an exhaust control valve mounting method, wherein a cover member is overlapped and fixed on the outer peripheral surface of the exhaust pipe, and the valve element insertion hole is covered with the cover member. Formed of a flexible sheet material and wound around the outer peripheral surface of the exhaust pipe at positions corresponding to the shaft support hole and the valve body insertion hole in the exhaust pipe, Using a positioning sheet displaying a shaft support hole mark representing a valve element insertion hole and a valve element insertion hole mark,
Before forming at least one of the shaft support hole and the valve pair insertion hole, the positioning sheet is wound around the outer peripheral surface of the exhaust pipe, and at least one of the target shaft support hole and the valve body insertion hole is formed. The exhaust control valve mounting method according to claim 17, wherein the formation position is determined using a mark on the positioning sheet.   When the shaft support hole is formed at one position opposed in one radial direction on the peripheral wall of the exhaust pipe and the valve body insertion hole is formed at the other position opposite to the shaft support hole, The target valve element insertion hole is formed by drilling a central through-hole opposed to the shaft support hole on the same radial direction line, and then cutting and forming slits extending linearly from both sides of the central through-hole. In addition, both ends of the rotation shaft of the valve member inserted into the exhaust pipe through the valve body insertion hole are rotatably supported and assembled by the shaft support hole and the central through hole. Alternatively, the exhaust control valve mounting method according to 18. An exhaust control valve assembly set for obtaining the exhaust control valve according to any one of claims 1 to 16,
The valve member and the lid member are included as constituent members, and the valve member forms the valve body insertion hole with respect to a separately prepared exhaust pipe of a vehicle, thereby exhausting the exhaust from the valve body insertion hole. The lid member has a structure that covers the valve element insertion hole by being attached to the outer peripheral surface of the exhaust pipe after the valve member is inserted. An exhaust control valve assembly set characterized by the above.   The assembly set of the exhaust control valve according to claim 20, comprising the positioning sheet according to claim 18 as a constituent member. The assembly set of the exhaust control valve according to claim 20 or 21, comprising a cutting tool for forming the valve body insertion hole in the exhaust pipe as a constituent member.

Images