JP2016166572A - Throttle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide new means for suppressing the wear of a component on which the face on the inner periphery side of a spiral part of a spring capable of energizing a valve element abuts.SOLUTION: A throttle device includes a throttle body 2 having an intake passage 4, a valve element 5, a valve shaft 51 for rotating the valve element, a throttle gear 21 for rotating the valve shaft, a throttle gear guide part 211 located on the outer periphery side of the valve shaft, a helical spring 6, and a guide member 24 slidable on the throttle gear guide part, the spring including a hook part 63, a spiral part 64 wound on the hook part starting at one end side in one direction, and a gear side end 61 connected to the spiral part, the gear side end being connected to a gear lock part 212 of the throttle gear having an outer periphery supporting part 214 abutting at least on the first-turn outer peripheral face of the spiral part at the side of the gear lock part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a throttle device. Specifically, the present invention relates to a throttle device mounted on a vehicle such as an automobile.

  It is widely practiced to adjust the amount of air introduced into the engine using a throttle device. The throttle device is provided with an intake passage through which air can pass, and the amount of air passing through the intake passage is adjusted by the opening of the valve body. It is known that a spring member is attached to a throttle device in order to exert an urging force to return the valve body moved from the initial state (default state) to its original state (see Patent Document 1). This spring member is a torsion spring that is helically twisted, and a part of a valve shaft that rotates the valve body is disposed inside the spring member. More specifically, the torsion spring is disposed so as to be positioned on the peripheral side of the sleeve fixed so as not to move relative to the valve shaft. The technique described in Patent Document 1 prevents the sleeve from being worn by making the winding diameter near the end of the torsion spring larger than the winding diameter near the center.

Japanese Patent Laid-Open No. 06-117281

  However, there is still room for improvement in the technique described in Patent Document 1. In the configuration described in Patent Document 1, two torsion springs having different diameters are necessary only to urge the valve body in the closing direction, and the diameter of the torsion spring must be changed from the middle, resulting in an increase in cost. There was a possibility of being connected to.

  The present invention has been devised in view of the above points, and the problem to be solved by the present invention is that the inner peripheral surface of the spiral portion of the spring capable of biasing the valve element comes into contact. It is to provide a new means for suppressing wear of parts.

In order to solve the above problems, the present invention takes the following means. First, the first means includes a throttle body having an intake passage, a valve body used for adjusting the air flow rate of the intake passage, a valve shaft for rotating the valve body, and a throttle gear for rotating the valve shaft. A throttle gear guide that moves integrally with the throttle gear and is located on the outer peripheral side of the valve shaft, is connected to the throttle body and the throttle gear, and has a string-wound spring that can urge the valve body in the rotational direction; A guide member that is slidable on the throttle gear guide portion between the gear guide portion and the spring, and the spring includes a hook portion that can contact a hook contact portion provided on the throttle body, and a hook portion A spiral portion wound in one direction from one end side and a gear side end portion connected to the spiral portion, and the gear side end portion are connected to a gear locking portion provided in the throttle gear
It is a throttle device provided with the outer peripheral support part which contact | abuts at least the outer peripheral surface of the 1st volume in the gear locking part side of a spiral part.

  According to this first means, it is possible to suppress the pressing force applied to the guide member by at least the first roll near the gear side end of the spring. As a result, it is possible to suppress the sliding resistance of the spring that can urge the valve body, so that it may be possible to suppress abnormal noise, member scraping, and motor load. In addition, since there is no need to change the diameter of the spiral spring, it may be possible to manufacture it at a relatively low cost.

  The second means includes a second spiral part in which the spring in the first means is wound in the direction opposite to the spiral part from the other end side of the hook part, and a body side end part connected to the second spiral part, The body side end is a throttle device connected to a body locking portion provided in the throttle body.

  According to the second means, only one spring is required for the initial state (default state), and it is possible to improve the workability of the assembly and to reduce the cost.

  The third means is the throttle device according to the first or second means, and includes a recessed portion that fits in a state in which at least the first volume on the gear locking portion side of the spiral portion is pressed, and the outer peripheral support portion. Is a throttle device which is a component of the recess.

  According to the third means, since the first roll on the gear locking portion side of the first spiral portion is pressed and fitted into the recess, the first roll falls off from the outer peripheral support portion. This can be suppressed.

  The fourth means is the throttle device according to the first to third means, and a part of the spiral part is in contact with the guide member, but at least the first turn on the gear locking part side of the spiral part is This is a throttle device that is not in contact with the guide member.

  According to the fourth means, it is possible to support the spiral portion with the guide member and to suppress the occurrence of rubbing between the spiral portion and the guide member.

  The fifth means includes a throttle body having an intake passage, a valve body used for adjusting the air flow rate of the intake passage, a valve shaft for rotating the valve body, a throttle gear for rotating the valve shaft, and a throttle A throttle gear guide that moves integrally with the gear and is located on the outer peripheral side of the valve shaft, is connected to the throttle body and the throttle gear, and has a string-wound spring that can urge the valve body in the rotational direction, A guide member that is slidable on the throttle gear guide portion between the spring portion and the spring, wherein the spring is a hook portion that can be in contact with a hook contact portion provided in the throttle body, and one end side of the hook portion And a gear side end connected to the spiral portion, and the gear side end is connected to a gear locking portion provided in the throttle gear. Member is a throttle device that at least the first turn at least the gear engaging portion of the spiral portion is arranged at a position not abutting the guide member.

  According to the fifth means, it is possible to suppress the frictional force applied to the guide member by at least the first roll near the gear side end of the spring. For this reason, it may be possible to suppress abnormal noise, member scraping, and motor load. In addition, since there is no need to change the diameter of the spiral spring, it may be possible to manufacture it at a relatively low cost.

  According to this means, it is possible to provide a new means for suppressing the sliding resistance generated on the inner peripheral surface of the spiral portion of the spring capable of biasing the valve body.

It is a perspective view of a throttle device of an example. It is a side view in the default state of the throttle device of the first embodiment with the gear case cover removed. It is sectional drawing in the III-III cross section of FIG. It is a disassembled perspective view which shows the state before attaching a guide member, a spring, and a throttle gear. It is the figure which looked at the throttle gear of the 1st example with which the guide member and the spring were attached from the valve element side. It is a perspective view of the throttle gear of the first embodiment to which a guide member and a spring are attached. It is a side view in the fully closed state of the throttle device of the first embodiment with the gear case cover removed. It is a side view in the fully open state of the throttle device of the first embodiment with the gear case cover removed. It is the schematic which looked at the throttle gear of the 1st example with which the guide member and the spring were attached from the side. However, only the guide member is represented by a cross-sectional shape. Moreover, the boundary between the spiral portion and the second spiral portion is indicated by a broken line portion. It is the schematic of a 1st modification. However, only the guide member is represented by a cross-sectional shape. Moreover, the boundary between the spiral portion and the second spiral portion is indicated by a broken line portion. It is the schematic of a 2nd modification. However, only the guide member is represented by a cross-sectional shape. Moreover, the boundary between the spiral portion and the second spiral portion is indicated by a broken line portion. It is the schematic of a 3rd modification. However, only the guide member is represented by a cross-sectional shape. Moreover, the boundary between the spiral portion and the second spiral portion is indicated by a broken line portion. It is the schematic in a 2nd Example. However, only the guide member is represented by a cross-sectional shape. Moreover, the boundary between the spiral portion and the second spiral portion is indicated by a broken line portion.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. In the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined such that X shown in FIG. 1 is the front direction, Y is the left direction, and Z is the up direction. For example, in FIG. 1, the side where the opening of the intake passage 4 of the throttle device 1 is located is the front side. The side where the gear case cover 3 is located is the left side, and the side where the throttle body 2 is located is the right side. In the following, the direction will be referred to based on the state of FIG. 1 unless otherwise specified.

  The throttle device 1 in the present embodiment is mounted on a vehicle. In particular, the vehicle is mounted on a vehicle. The throttle device 1 is used to adjust the amount of outside air introduced to an internal combustion engine (not shown) of the vehicle, and the valve body 5 can be rotated with respect to the throttle body 2 including the intake passage 4. Is attached. The direction of the valve body 5 can be adjusted by a motor 22 provided in the throttle body 2 (see FIGS. 2 and 3). The throttle device 1 includes an intermediate gear 23 that meshes with a gear 22 a provided on the motor shaft, and a throttle gear 21 that meshes with the intermediate gear 23. A valve shaft 51 is fixed to the throttle gear 21, and the valve body 5 is fixed to the valve shaft 51. Because of such a configuration, by rotating the motor 22, the throttle gear 21 is moved and the valve body 5 can be rotated.

  The throttle device 1 is provided with a string-wound spring 6 and has a structure capable of being biased so as to be in a default state when the valve body 5 is moved from an initial state (default state). For this reason, in a state where electricity is not communicated to the motor 22, the valve body 5 is in a default state (see FIG. 2).

  The valve shaft 51 to which the valve body 5 is fixed is fixed so as not to move relative to the throttle gear 21. A throttle gear guide 211 is provided on one end side of the valve shaft 51 so as to cover the outer periphery of the valve shaft 51 (see FIG. 3). A substantially cylindrical guide member 24 is disposed on the outer peripheral side of the throttle gear guide 211 formed in a state in which it cannot move relative to the throttle gear 21. The guide member 24 is configured to have an inner diameter slightly larger than the outer diameter of the cylindrical portion of the throttle gear guide portion 211, and the guide member 24 and the throttle gear guide portion 211 are slidable.

  A string-wound spring 6 is disposed on the outer periphery of the guide member 24 (see FIGS. 3 to 6). The spring 6 is formed to have an inner diameter that is slightly larger than the outer diameter of the cylindrical portion of the guide member 24. One end of the spring 6 is fixed to the throttle gear 21 and is arranged so as to bias the valve body 5 in the rotational direction. The spring 6 includes a hook portion 63 capable of contacting the throttle body 2 and a spiral portion 64 wound in one direction from one end side of the hook portion 63. The spiral portion 64 is connected to a gear locking portion 212 provided in the throttle gear 21, and at least the first turn on the gear locking portion 212 side of the spiral portion 64 is in contact with the outer peripheral support portion 214. Due to the presence of the outer peripheral support portion 214, at least the pressing force applied to the guide member 24 by the first roll can be suppressed.

  In the present embodiment, a throttle device 1 is disposed on an intake passage 4 provided in a metal throttle body 2 in a state in which a substantially disc-like valve body 5 is rotatable. The valve body 5 is fixed to the rod-shaped valve shaft 51, and the valve body 5 can be rotated by rotating the valve shaft 51. One end side of the valve shaft 51 is inserted into the throttle gear 21, and the valve shaft 51 and the throttle gear 21 are fixed so as not to move relative to each other. The valve shaft 51 is rotatably supported by a bearing 71 attached to the throttle body 2.

  An electric motor 22 is attached to the throttle body 2. The motor 22 is provided with a gear 22a on the tip side of a rod-shaped motor shaft. The gear 22a meshes with an intermediate gear 23 formed by a two-stage gear including a large gear portion 231 and a small gear portion 232, and is particularly configured to mesh with the large gear portion 231 and the gear 22a. The small gear portion 232 of the two-stage gear is arranged so as to mesh with the throttle gear 21 and allows the throttle gear 21 to rotate more slowly than the rotational speed of the motor shaft. In addition, if the rotation direction of a motor shaft is changed, the rotation direction of the valve body 5 will also change.

  The state in which the valve body 5 is positioned so as to be orthogonal to the flow of air moving in the intake passage 4 is a fully closed state (see FIG. 7). The throttle device 1 of the present embodiment is configured so as not to be fully closed in a state where electricity is not conducted to the motor 22. Specifically, in a state where electricity is not communicated with the motor 22, the valve body 5 is configured to be slightly inclined from the fully closed state (see FIG. 2). This state is referred to as a default state in this specification. In the default state, a small amount of air can be passed through the intake passage 4.

  The throttle device 1 according to the present embodiment includes a spring 6 so that the motor 22 can be in a default state when electricity is not communicated. When the spring 6 is in a state different from the default state, the spring 6 can be urged to return to the default state. The urging force of the spring 6 cannot be set to the default state by the spring 6 in a state where the motor 22 is energized (a state where the motor shaft can be controlled). However, when the energization to the motor 22 is interrupted, the spring 6 is restored. It is selected so that it can use force to make it the default state.

  The spring 6 of this embodiment can be returned to the default state with one spring 6 regardless of whether the valve body 5 is open or closed from the default state. This spring 6 changes the winding direction of the spring 6 in the middle, and a gear side end portion 61 which is one end of the spring 6 is connected to a gear locking portion 212 provided in the throttle gear 21 and the other end. The body side end 62 is connected to a body locking portion (not shown) provided in the throttle body 2. A portion for changing the winding direction of the spring 6 is formed so as to protrude outward from the outer diameter of the spring 6. The hook portion 63 hooked on the hook stopper portion 213 provided in the throttle gear 21 is U-shaped. It is formed in a shape. The gear side end portion 61 and the body side end portion 62 are formed so as to protrude outward from the outer diameter of the spring 6.

  In the spring 6 of the present embodiment, the outer diameter and the inner diameter of the spiral portion 64 positioned between the gear side end portion 61 and the hook portion 63 are formed substantially uniformly when no force is applied. (See FIG. 4). Further, the outer diameter and inner diameter of the second spiral portion 65 located between the body side end portion 62 and the hook portion 63 are also formed substantially uniformly. Although not shown, when the spring 6 is attached to the throttle gear 21 or the like, the spring 6 is attached in a twisted state so that the inner diameter of the spiral portion 64 is reduced.

  While the throttle gear 21 rotates and moves from the default state to the fully closed state as shown in FIG. 7, the hook portion 63 is in contact with the hook contact portion 28. Since the throttle gear 21 tends to move relative to the fixed hook contact portion 28, the hook portion 63 hooked on the hook stopper portion 213 is released from the state hooked on the hook stopper portion 213. . At this time, the hook portion 63 and the gear side end portion 61 move so as to approach each other, and the spiral portion 64 wound between the hook portion 63 and the gear side end portion 61 is deformed so that the inner diameter becomes small. It will be. In this state, when the motor 22 is no longer energized, the default state is established by the restoring force acting on the spiral portion 64. Even in a state where the inner diameter of the spiral portion 64 is reduced, the winding direction of the spiral portion 64 and the second spiral portion 65 is different, so the inner diameter of the second spiral portion 65 is reduced. is not.

  While moving from the default state to the fully open state as shown in FIG. 8, the hook portion 63 is hooked on the hook stopper portion 213, and the hook portion 63 moves so as to approach the body side end portion 62. Become. For this reason, the 2nd spiral part 65 wound between the hook part 63 and the body side edge part 62 deform | transforms so that an internal diameter may become small. When the motor 22 is not energized in this state, the default state is set by the restoring force acting on the second spiral portion 65. While moving from the default state to the fully open state, the inner diameter of the spiral portion 64 is not reduced.

  By the way, a throttle gear guide portion 211 is provided inside the spring 6 of this embodiment and around the portion into which the valve shaft 51 is inserted so as to surround the outer periphery of the valve shaft 51. The throttle gear guide portion 211 is a portion slidable with the guide member 24 arranged on the outer peripheral side thereof, and is provided in a cylindrical shape. The cylindrical throttle gear guide 211 is formed so as to protrude toward the valve body 5 in the throttle gear 21. The cylindrical guide member 24 positioned on the outer peripheral side of the throttle gear guide portion 211 is configured to have an inner diameter larger than the outer diameter of the throttle gear guide portion 211, and the throttle gear guide portion 211 and the guide member 24 are It is configured to be able to slide smoothly.

  The inner diameter of the spring 6 disposed on the outer peripheral side of the guide member 24 is formed larger than the outer diameter of the guide member 24. In particular, when the spring 6 is attached to the throttle device 1, the outer diameter of the guide member 24 is configured to be smaller than the inner diameter of the spring 6 at any position that the valve body 5 can take.

  The throttle gear 21 is provided with an outer peripheral support portion 214 that comes into contact with the outer periphery of the first turn from the gear side end portion 61 of the spring 6. The outer periphery support portion 214 is disposed at a position where the first roll of the spring 6 can reduce the force pressing the guide member 24 (see FIG. 9). In this embodiment, the spring 6 and the guide member 24 are in contact with each other from the gear-side end portion 61 in the third volume, but the outer periphery is supported so that the spring 6 does not contact the guide member 24 in the first and second volumes. A portion 214 is formed. The outer peripheral support portion 214 is formed integrally with the throttle gear 21 and is formed so that a force can be applied to the spring 6 in a direction opposite to the direction in which the spring 6 presses the guide member 24. . For this reason, the outer peripheral support portion 214 is formed so as to be able to come into contact with the spring 6 at a position on the opposite side from the place where the spring 6 comes into contact with the guide member 24 and from the gear side end portion 61 to the half circumference. ing. In this embodiment, the outer peripheral support portion 214 is formed so as to be able to support the spring 6 at a position opposite to the position where the spring 6 contacts the guide member 24 (position of the counter electrode). The outer periphery support portion 214 is formed so as to contact the first roll of the spring 6 before the guide member 24 even when the inner diameter of the spring 6 is the smallest.

  The outer peripheral support portion 214 of the present embodiment is formed in a protruding wall shape, and is positioned between the teeth 215 and the throttle gear guide portion 211 arranged in an arc shape (see FIGS. 4 and 9). . The outer periphery support portion 214 is configured to support only the first turn from the gear side end portion 61 on the outer periphery side, and suppresses the first turn from the gear side end portion 61 from moving in the radial direction of the spring 6. On the other hand, the outer periphery support portion 214 of this embodiment does not support the second and subsequent turns from the gear side end portion 61 on the outer periphery side. For this reason, when viewed from the axial direction of the spring 6, as shown in FIGS. 5 and 9, the spring 6 is attached to the throttle gear 21 so as to be displaced in the radial direction.

  The center of the circle drawn by the main part of the spring 6 attached to the throttle device 1 does not coincide with the center of the throttle gear guide 211 or the center of the guide member 24, and the spring 6 is in contact with the guide member 24. (See FIG. 9). At this time, the guide member 24 is pressed against the throttle gear guide portion 211. Since the guide member 24 can move so as to slide with respect to the curved surface of the throttle gear guide portion 211, when the throttle gear guide portion 211 rotates in this state, the throttle gear guide portion 211 slides with the guide member 24. It will be. At this time, the guide member 24 may move slightly although not as much as the throttle gear guide portion 211. In this case, the spring 6 and the guide member 24 are relatively moved in the rotation direction.

  By the way, the spiral part 64 located between the hook part 63 and the gear side edge part 61 does not show the same behavior in any part. For example, when moving from the default state toward the fully closed state, the portion close to the gear side end portion 61 behaves like following the throttle gear 21, and the portion close to the hook portion 63 moves relative to the throttle gear 21. Will behave. Therefore, when moving from the default state toward the fully closed state, the first roll closest to the gear side end portion 61 is most likely to move relative to the guide member 24. By forming the outer peripheral support portion 214 as in the present embodiment, it is possible to suppress the spring 6 from rubbing the guide member 24. On the other hand, the portion close to the hook portion 63 in the spring 6 is also difficult to move relative to the guide member 24, so that a sufficient pressing force can be applied to the guide member 24. Such a configuration also contributes to suppressing the falling off of the spring 6 and exerting a biasing force toward the desired direction.

  In the throttle device 1 of this embodiment, by providing the guide member 24, it is possible to increase the contact area of the sliding portion compared to the spring 6, so that it is possible to suppress a load from being applied locally. It becomes. Therefore, it can be possible to prevent the sliding surface from being rough.

  Next, a modified example will be described. The difference between the first and second modified examples and the embodiment is the shape of the outer peripheral support portion 214. As shown in FIGS. 10 and 11, the throttle gear 21 includes a recess 73 that fits in a state in which at least the first roll on the side of the gear locking portion 212 of the spiral portion 64 is pressed. In particular, the outer peripheral support portion 214 is formed to be a component of the recessed portion 73. In the outer peripheral support portion 214 of the first modification shown in FIG. 10, an inclined surface is formed so as to be adjacent to the throttle gear guide portion 211 toward the valve body 5 side. By setting it as such a shape, it is suppressed that the site | part which is contact | abutting to the outer periphery support part 214 moves to the valve body 5 side. That is, even if the spring 6 is moved by vibration or the like, it may be possible to ensure the effect of the present invention.

  The second modification shown in FIG. 11 is formed so as to extend parallel to the throttle gear guide 211 with respect to the surface with which the spring 6 abuts, and protrudes toward the throttle gear guide 211 on the extension of the abutting surface. A projection 218 is formed. In addition, the recessed part 73 is not restricted to the example described as a 1st modified example or a 2nd modified example, It can also be set as cross-sectional view substantially U-shape.

  As for the third modification, the shape of the spring 6 is the main difference from the embodiments and other modifications. In the third modification, the outer diameter of the first volume of the spiral portion 64 closer to the gear locking portion 212 is formed to be larger than the other part of the spiral portion 64 (see FIG. 12). In this case, since the base portion 216 that supports the teeth 215 formed in an arc shape comes into contact with the spring 6, it may be possible to use the throttle gear 21 having the same structure as the conventional one.

  In the first embodiment, the positional relationship between the spiral portion 64 and the guide member 24 is adjusted by supporting the first turn of the spiral portion 64 near the gear side end portion 61 from the outer peripheral side. In the example, this positional relationship is adjusted by different means. Since the rest of the configuration is substantially the same as that of the first embodiment, the description will focus on the adjustment means for the positional relationship between the spiral portion 64 and the guide member 24.

  In the second embodiment, as shown in FIG. 13, the guide member 24 is not inside the first turn of the spiral portion 64 near the gear side end portion 61. That is, the guide member 24 is disposed closer to the valve body 5 than the first volume of the spiral portion 64 near the gear side end portion 61. In the case of the present embodiment, the outer periphery of the base portion 217 of the throttle gear guide 211 is formed so that the first turn near the gear side end 61 is wound, and the outer periphery of the guide member 24 is the second turn. Etc. are rolled up.

  In this embodiment, a throttle gear guide portion 211 having an outer diameter smaller than the outer diameter of the substantially cylindrical base portion 217 is formed so as to be connected to the base portion 217. The step formed by the base portion 217 and the throttle gear guide portion 211 prevents the guide member 24 from moving toward the valve body 5. Further, the throttle body 2 is formed with a boss portion 26 protruding toward the throttle gear 21 side, and the boss portion 26 prevents the guide member 24 from moving toward the valve body 5 side. As in the first embodiment, the guide member 24 is formed to be slidable with respect to the throttle gear guide portion 211.

  In the present embodiment, the first roll near the gear side end portion 61 is configured to come into contact with a base portion 217 formed on the throttle gear 21. Since the first volume of the spiral portion 64 tends to move so as to follow the throttle gear 21, the base portion 217 and the spiral portion 64 are less likely to rub against each other. Since the outer diameter of the base part 217 is formed to be smaller than the case where the inner diameter of the spiral part 64 is the smallest diameter, the spiral part 64 prevents the base part 217 from being worn. . Since the second and subsequent rolls are not deformed as much as the first roll, generation of a large frictional force between the spiral portion 64 and the guide member 24 is suppressed.

  In the present embodiment, there is no need to change the diameter of the spring 6 in the middle, so that it may be possible to reduce the manufacturing cost. In this embodiment, the base portion 217 is formed so that only the first roll is in contact, but may be formed so as to be in contact with the second or third roll in addition to the first roll. Is possible. However, a part of the spiral portion 64 is in contact with the guide member 24.

  As mentioned above, although embodiment was described using two Examples and some modifications, this invention can be implemented with other various forms besides the said embodiment. For example, the outer peripheral support portion does not need to be formed with a single wall-shaped portion, and can be formed with a plurality of wall-shaped portions.

  The spring for urging the throttle gear is not necessarily formed by only one, and a plurality of springs can be used. For example, it is also possible to arrange one spring between the gear side end and the hook part and arrange another spring between the hook part and the body side end.

  The outer periphery support portion may not be in a state where the first turn is separated from the gear side end portion of the guide member and the spring. This is because if the pressing force applied to the guide member by the first roll is suppressed, the frictional force generated between the spring and the guide member can be reduced accordingly. However, it is more preferable that the first roll is separated from the gear side end of the guide member and the spring.

  Not only the first roll near the gear side end is separated from the guide member, but the first roll is separated from the guide member within a predetermined range including the second roll and the third roll. Is possible.

  The vehicle is not limited to a vehicle, and may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Throttle device 2 Throttle body 4 Intake passage 5 Valve body 6 Spring 21 Throttle gear 24 Guide member 28 Hook contact part 51 Valve shaft 61 Gear side end part 62 Body side end part 63 Hook part 64 Spiral part 65 Second spiral part 73 Recessed portion 211 Throttle gear guide portion 212 Gear locking portion 213 Hook stopper portion 214 Outer peripheral support portion

Claims (5)

A throttle body with an intake passage;
A valve body used to adjust the air flow in the intake passage;
A valve shaft that rotates the valve body;
A throttle gear that rotates the valve shaft;
A throttle gear guide that moves integrally with the throttle gear and is located on the outer peripheral side of the valve shaft;
A string-wound spring connected to the throttle body and the throttle gear and capable of urging the valve body in the rotational direction;
A guide member slidable on the throttle gear guide portion between the throttle gear guide portion and the spring,
The spring includes a hook portion that can come into contact with a hook contact portion provided in the throttle body, a spiral portion wound in one direction from one end side of the hook portion, and a gear side end portion that is connected to the spiral portion. The gear side end is connected to a gear locking part provided in the throttle gear,
A throttle device comprising an outer peripheral support portion that contacts at least the outer peripheral surface of the first turn on the gear locking portion side of the spiral portion. The throttle device according to claim 1,
The spring includes a second spiral portion wound in a direction opposite to the spiral portion from the other end side of the hook portion, and a body-side end portion connected to the second spiral portion,
The body side end portion is a throttle device connected to a body locking portion provided in the throttle body. The throttle device according to claim 1 or 2,
It has a recessed portion that fits in a state where at least the first volume is pressed on the gear locking portion side of the spiral portion,
The throttle device in which the outer periphery support portion is a component of the recess.   The throttle device according to any one of claims 1 to 3, wherein a part of the spiral portion is in contact with the guide member, but at least the first roll on the gear locking portion side of the spiral portion is a guide. A throttle device that is not in contact with a member. A throttle body with an intake passage;
A valve body used to adjust the air flow in the intake passage;
A valve shaft that rotates the valve body;
A throttle gear that rotates the valve shaft;
A throttle gear guide that moves integrally with the throttle gear and is located on the outer peripheral side of the valve shaft;
A string-wound spring connected to the throttle body and the throttle gear and capable of urging the valve body in the rotational direction;
A guide member slidable on the throttle gear guide portion between the throttle gear guide portion and the spring,
The spring includes a hook portion that can come into contact with a hook contact portion provided in the throttle body, a spiral portion wound in one direction from one end side of the hook portion, and a gear side end portion that is connected to the spiral portion. The gear side end is connected to a gear locking part provided in the throttle gear,
The guide device is a throttle device in which at least the first roll on the side of the gear locking portion of the spiral portion is disposed at a position where the guide member does not contact the guide member.

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