WO2019009134A1

WO2019009134A1 - Throttle valve device

Info

Publication number: WO2019009134A1
Application number: PCT/JP2018/024095
Authority: WO
Inventors: 彰樋口; 正小宮山
Original assignee: 株式会社デンソー
Priority date: 2017-07-07
Filing date: 2018-06-26
Publication date: 2019-01-10
Also published as: JP2019015249A

Abstract

In this throttle valve device, when a rotating body (525, 6525) is oriented at a default position (Ld) due to the absence of a drive force, a first hook part (531) and a second hook part (532) each engage with a fixed engagement part (330) and/or a movable engagement part (528), and when the rotating body (525, 6525) is rotated from the default position (Ld) due to the generation of a drive force, the first hook part (531) and the second hook part (532) respectively engage with one or the other of the fixed engagement part (330) and the movable engagement part (528). On a radially inward side of a first winding part (535) of a coil part (533) on the first hook part (531) side and/or a first winding part (536) thereof on the second hook part (532) side, a guide body (526, 2526, 3526, 4526, 5526, 6526, 7526) is provided with a relief part (524, 2524, 3524, 4524, 5524, 7524) that lets the coil part (533) escape.

Description

Throttle valve device

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2017-133975 filed on Jul. 7, 2017, the contents of which are incorporated herein by reference.

The present disclosure relates to a throttle valve device.

BACKGROUND ART Conventionally, a throttle valve device that increases or decreases the opening degree of a fluid passage formed in a valve body by a throttle valve body is widely known. For example, in the throttle valve device disclosed in Patent Document 1, a default spring as a torsion coil spring biases a rotating body that integrally rotates with the throttle valve body due to the generation of a driving force. As a result, when the driving force is lost, the rotary body can be localized at the default position together with the throttle valve.

The default spring according to the throttle valve device disclosed in Patent Document 1 has a coil portion between the first hook portion and the second hook portion, and is guided from inside in the radial direction by the guide body. In the default spring, when the rotary body is rotated from the default position due to the generation of the driving force, the first hook portion and the second hook portion are respectively one of the fixed engagement portion of the valve body and the movable engagement portion of the rotary body. Engage with the other. In the default spring, when the rotating body is localized at the default position due to the loss of the driving force, the first hook portion and the second hook portion respectively engage at least the movable engagement portion.

Now, in the default spring according to the throttle valve device disclosed in Patent Document 1, the coil portion is guided at the time of rotation of the rotating body after assembly, by centering the center line of the coil portion in the opposite direction to the deformation direction during assembly. It is said that it becomes difficult to slide with the body.

JP 2004-301118 A

However, in the throttle valve device disclosed in Patent Document 1, due to manufacturing tolerances, the attitude of the default spring (in other words, the eccentricity such as the eccentricity angle and the eccentricity amount) does not become as planned due to manufacturing tolerances. During rotation, the coil portion may slide on the guide body to cause wear. This is because the direction in which the guide body is pressed by the coil portion that rotates around the engagement location is received by the respective hook portions engaging with the engagement target at the default position and receiving the reaction force. The present inventors have found that it is because the 1 hook portion side and the 2nd hook portion side are different.

The present disclosure has been made based on the above-described findings, and an object thereof is to provide a throttle valve device that suppresses wear.

In order to achieve the above object, a first aspect of the present disclosure includes a valve body having a fixed engagement portion, which forms a fluid passage, a throttle valve body that increases or decreases the degree of opening of the fluid passage, and a movable engagement. , A torsion coil spring having a coil portion between the first hook portion and the second hook portion, and a guide body for guiding the coil portion from the inner side in the radial direction The first hook portion and the second hook portion are engaged with at least one of the fixed engagement portion and the movable engagement portion, respectively, when the rotor is positioned at the default position due to the loss of the driving force. When the rotating body rotates from the default position due to the generation of the driving force, the first hook portion and the second hook portion respectively engage with one and the other of the fixed engaging portion and the movable engaging portion. The guide body is a first winding portion on the first hook portion side of the coil portion Beauty in at least one of the radially inner of 1 tum of the second hook portion, the relief portion escape coil unit has.

According to the first aspect, the guide body is formed on the radially inner side of at least one of the first turn portion on the first hook portion side and the first turn portion on the second hook portion side in the coil portion. The relief portion can release the coil portion that is to abut on the guide body. According to this, the first hook portion and the second hook portion are engaged with the engagement target at the default position to receive the reaction force, and the coil portion rotates around the engagement portion, Also, it becomes difficult for the guide body to be pressed. Therefore, it is possible to suppress a situation where the coil portion slides with the guide body to cause wear when the rotating body rotates from the default position.

In addition, to achieve the above-mentioned object, the second aspect of the present disclosure includes a valve body having a fixed engagement portion, which forms a fluid passage, a throttling valve body that increases or decreases the degree of opening of the fluid passage, and It has an engaging portion and a rotating body that rotates integrally with the throttle valve body, a torsion coil spring having a coil portion between the first hook portion and the second hook portion, and guides the coil portion from the inner side in the radial direction The first hook portion and the second hook portion respectively include at least one of the fixed engagement portion and the movable engagement portion when the rotary body is positioned at the default position due to the loss of the driving force and the guide body is provided. The first hook portion and the second hook portion engage with one or the other of the fixed engagement portion and the movable engagement portion, respectively, when the rotating body is rotated from the default position by the generation of the driving force. Of the first hook portion of the coil portion and the first At least one of the radially inner of 1 tum of the hook portion side, the guide member is reduced in diameter.

According to the second aspect, at least one of the first winding portion on the first hook portion side and the first winding portion on the second hook portion side of the coil portion is reduced in diameter radially inside the guide body The contact of the coil portion can be relieved. According to this, the first hook portion and the second hook portion are engaged with the engagement target at the default position to receive the reaction force, and the coil portion rotates around the engagement portion, Also, it becomes difficult for the guide body to be pressed. Therefore, it is possible to suppress a situation where the coil portion slides with the guide body to cause wear when the rotating body rotates from the default position.

The above object and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the attached drawings. The drawing is

FIG. 1 is a cross-sectional view showing a throttle valve device according to a first embodiment. FIG. 2 is a view showing an operating state of the throttle valve device according to the first embodiment, and is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a view showing an operating state different from FIG. 2 and a cross-sectional view corresponding to FIG. 2. FIG. 5 is a view showing an operating state different from FIGS. 2 and 3 and a cross-sectional view corresponding to FIG. 2. It is a front view which shows typically the drive unit by 1st Embodiment. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5; FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5; It is a front view which shows the drive unit by 2nd Embodiment typically. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. It is a front view which shows the drive unit by 3rd Embodiment typically. It is a front view which shows the drive unit by 4th Embodiment typically. It is a front view which shows the drive unit by 5th Embodiment typically. FIG. 13 is a cross-sectional view taken along line XIII-XIII of FIG. It is a front view which shows the drive unit by 6th Embodiment typically. It is a front view which shows the drive unit by 7th Embodiment typically. FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. It is sectional drawing which shows the modification of FIG. It is sectional drawing which shows the modification of FIG. It is sectional drawing which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG. It is a front view which shows the modification of FIG.

Hereinafter, a plurality of embodiments will be described based on the drawings. In addition, the overlapping description may be abbreviate | omitted by attaching the same code | symbol to the corresponding component in each embodiment. When only a part of the configuration is described in each embodiment, the configuration of the other embodiments described above can be applied to other parts of the configuration. Further, not only the combination of the configurations explicitly described in the description of the respective embodiments but also the configurations of the plurality of embodiments can be partially combined with each other even if the combination is not specified unless any trouble occurs in the combination.

First Embodiment
As shown in FIG. 1, the throttle valve device 1 according to the first embodiment is applied to an electric throttle device mounted on an internal combustion engine of a vehicle. The throttle valve device 1 opens and closes a fluid passage 2 which constitutes a part of an intake passage in an internal combustion engine. In the fluid passage 2, intake air, which is drawn into the internal combustion engine as a fluid, flows. The throttle valve device 1 adjusts the flow rate of intake air flowing through the fluid passage 2. The throttle valve device 1 includes a throttle valve body 10, a valve shaft 20, a valve body 30, a drive unit 50, and a sensor unit 70.

The throttle valve body 10 is a butterfly type rotary valve. The throttle valve body 10 is formed in a disk shape by metal. In the throttle valve body 10, a rotation center line Cr is set substantially perpendicular to the passage axis Aa of the fluid passage 2. The throttle valve body 10 is accommodated in the fluid passage 2 so as to be rotatable on both sides around the rotation center line Cr. The throttle valve body 10 adjusts the flow rate of intake air in the fluid passage 2 by increasing or decreasing the degree of opening of the fluid passage 2 by rotation around the rotation center line Cr.

The valve shaft 20 is a shaft for rotationally driving the throttle valve body 10. The valve stem 20 is formed of metal in an elongated round bar shape. The valve stem 20 crosses the fluid passage 2 by being disposed in a posture extending on the rotation center line Cr of the throttle valve body 10. The valve stem 20 is fastened to the throttle valve body 10 so as to be integrally rotatable.

The valve body 30 is a fixed node fixed to an intake pipe forming an intake passage in an internal combustion engine. The valve body 30 is configured by combining a body 31, a body cover 32 and a body hook 33. The body main body 31 is formed in a block shape of metal. The body main body 31 has a bore portion 310 and

housing portions

311 and 312. The fluid passage 2 penetrates through the bore portion 310 in a cylindrical hole shape that can be opened and closed by the disc-like throttle valve body 10. The

housing portions

311 and 312 are respectively provided in a hollow shape on both sides of the bore portion 310 on the rotation center line Cr.

The radial sliding bearing 34 is housed and fixed in the first housing portion 311. The radial sliding bearing 34 radially supports the outer peripheral surface of one end of the valve shaft 20. In the second housing portion 312, a radial rolling bearing 36 is housed and fixed. The radial rolling bearing 36 radially supports an outer peripheral surface of an intermediate portion between the end portions of the valve shaft 20.

The body cover 32 is formed of resin in a flat plate shape. The body cover 32 covers the second accommodation portion 312 by being fastened to the body main body 31. The drive unit 50 and the sensor unit 70 are accommodated and disposed in the main accommodation space 37 in which the body cover 32 is formed jointly with the second accommodation portion 312.

As shown in FIGS. 1 and 2, the body hook 33 is formed in a bent shape by metal. The body hook 33 is provided in the second housing portion 312 and thus protrudes into the main housing space 37. The body hook 33 has a fixed engagement portion 330 at a part where it enters into the main accommodation space 37. The fixed engagement portion 330 is formed in a substantially arcuate piece shape that extends in a part around the rotation center line Cr in the main housing space 37.

The drive unit 50 is an electric actuator for rotationally driving the throttle valve body 10 via the valve shaft 20. The drive unit 50 is configured by combining a drive motor 51, a reduction mechanism 52, and a torsion coil spring 53.

The drive motor 51 shown in FIG. 1 is an electric motor which rotates to both sides around the motor axis line Am by energization from an external control circuit. The drive motor 51 has a metal motor shaft 510 that generates a drive force by rotation.

The reduction gear mechanism 52 shown in FIGS. 1 and 2 has a plurality of resin gears 520, 521, 522, and 523 connected in gear. The speed reduction mechanism 52 exhibits a rotational speed reduction function between the first gear 520 and the last gear 523. The first gear 520 is integrally rotatably mounted around the motor axis Am with respect to the coaxial motor shaft 510. The final-stage gear 523 is integrally fixed to the coaxial valve shaft 20 around the rotation center line Cr, and is thus integrally rotatable with the throttle valve body 10. The driving force (hereinafter simply referred to as "driving force") input from the driving motor 51 to the first gear 520 is amplified by the rotational speed reduction function and transmitted from the last gear 523 to the valve shaft 20. By receiving such a transmission drive force from the valve shaft 20, the throttle valve body 10 is rotated to a side corresponding to the drive force among both sides around the rotation center line Cr.

The final stage gear 523 includes a rotating body 525 and a guide body 526. A meshing portion 527 and a movable engagement portion 528 are integrally provided in the generally cylindrical rotary body 525. The meshing portion 527 is formed in the shape of a partial spur gear that extends in a part around the rotation center line Cr in the main housing space 37. The meshing portion 527 meshes with the gear 522 on the front side of the final gear 523.

The movable engagement portion 528 is formed in a substantially arc-like piece that extends in a part around the rotation center line Cr in the main housing space 37. In the present embodiment, the movable engagement portion 528 is disposed closer to the rotation center line Cr than the fixed engagement portion 330, that is, displaced radially inward of the fixed engagement portion 330.

Here, the rotational position of the rotating body 525 shown in FIGS. 1 and 2 is preset to a default position Ld in which the fluid passage 2 is slightly opened from the fully closed state by the throttle valve body 10. At this default position Ld, the rotor 525 is localized due to the loss of the driving force.

On the other hand, the rotational position of the rotating body 525 shown in FIG. 3 is previously set to the fully open position Lo where the fluid passage 2 is fully opened by the throttle valve 10, ie, the maximum opening degree on product specifications. At this fully open position Lo, the meshing portion 527 is locked by the second accommodation portion 312 from the opposite side to the default position Ld to open the fluid passage 2 in the rotational direction (hereinafter simply referred to as “open side”) Rotation to the rotating body 525 is restricted. Therefore, on the open side of the default position Ld, a rotation area in which the rotary body 525 is rotationally driven by the generation of the driving force up to the fully open position Lo is defined as a large rotation area Rl.

On the other hand, the rotational position of the rotating body 525 shown in FIG. 4 is preset to the fully closed position Lc where the fluid passage 2 is fully closed by the throttle valve body 10. In the fully closed position Lc, the second accommodation portion 312 locks the meshing portion 527 from the opposite side to both the fully open position Lo and the default position Ld, thereby closing the fluid passage 2 in the rotational direction. The rotation to the side of the rotating body 525 (hereinafter referred to simply as the “closed side”) is restricted. Therefore, on the closed side of the default position Ld, the rotation area in which the rotary body 525 is rotationally driven by the generation of the driving force up to the fully closed position Lc is permitted as the small rotation area Rs than the large rotation area Rl It is defined in a small area of the rotation angle.

As shown in FIG. 1, the guide body 526 is formed in a cylindrical shape which is continuous around the rotation center line Cr in the main housing space 37. The guide body 526 is integrally formed coaxially with the meshing portion 527 of the rotating body 525. The guide body 526 is coaxially mounted on the valve stem 20 and can be integrated.

The torsion coil spring 53 shown in FIGS. 1 and 2 is a torsion spring which is elastically deformed by torsion to generate a restoring force. The torsion coil spring 53 is formed by winding a metal wire. The torsion coil spring 53 is disposed around the guide body 526. The torsion coil spring 53 has a coil portion 533 between the

hook portions

531 and 532 at both ends.

The

hook portions

531 and 532 are formed in a hook shape (i.e., a hook shape) bent or curved radially outward from the coil portion 533, respectively. The

hook portions

531 and 532 both extend to the outer side in the radial direction than the movable engagement portion 528 and the fixed engagement portion 330. Around the guide body 526, the first hook portion 531 is disposed closer to the meshing portion 527 than the second hook portion 532 in the axial direction along the rotation center line Cr.

In the default position Ld of FIGS. 1 and 2, the first hook portion 531 engages with the movable engagement portion 528 that is at least one of the

engagement portions

330 and 528 from the open side. At the same time, in the default position Ld, the second hook portion 532 engages with the movable engagement portion 528 which is at least one of the

engagement portions

330 and 528 from the closing side. In these engagement states, the

hooks

531 and 532 apply the recovery force to the opposite side to the same engagement target, so that the rotating body 525 whose driving force has disappeared at the default position Ld is in the localized state. maintain.

On the other hand, in the large rotation area Rl including the fully open position Lo of FIG. 3 as the rotation area shifted to the release side from the default position Ld, the first hook portion 531 becomes the movable engagement portion 528 that becomes one of the

engagement portions

330 and 528. , From the open side. At the same time, in the large rotation area Rl, the second hook portion 532 engages with the fixed engagement portion 330, which is the other of the

engagement portions

330 and 528, from the closing side. In these engaged states, the first hook portion 531 applies restoration force to the closing side to the movable engagement portion 528 to be engaged, to a position where the restoration force balances with the driving force in the large rotation area Rl. The rotating body 525 rotates.

On the other hand, in the small rotation area Rs including the fully closed position Lc of FIG. 4 as the rotation area shifted from the default position Ld to the closing side, the first hook portion 531 is one of the fixing

portions

330 and 528. The engagement portion 330 is engaged from the open side. At the same time, in the small rotation area Rs, the second hook portion 532 engages with the movable engagement portion 528 which is the other of the

engagement portions

330 and 528 from the closing side. In these engaged states, the second hook portion 532 applies a restoring force to the opening side of the movable engaging portion 528 to be engaged, so that the position where the restoring force and the driving force are balanced in the small rotation area Rs. The rotating body 525 rotates.

As shown in FIGS. 1 and 2, the coil portion 533 is formed in a coil shape (i.e., a spiral shape) that leaves a gap between metal wires. The coil portion 533 is guided by the guide body 526 from the inside in the radial direction. The coil diameter from the coil center line Cc in the coil portion 533 is substantially constant between both ends. The coil center line Cc of the coil portion 533 at the default position Ld is inclined with respect to the rotation center line Cr as schematically shown in FIG. This depends on the rotation of the

first turn portions

535 and 536 on the side of the

hook portions

531 and 532 of the coil portion 533 at the default position Ld as schematically shown in FIGS.

Specifically, as shown in FIG. 6, at the default position Ld, the first hook portion 531 engages with the movable engagement portion 528 to be engaged and receives a reaction force, so that 1 of the first hook portion 531 side. The winding portion 535 rotates about the engagement point Pe1 (see FIGS. 5 and 6). In addition, as shown in FIG. 7, at the default position Ld, the second hook portion 532 engages with the movable engagement portion 528 to be engaged and receives a reaction force, so that the first turn on the second hook portion 532 side The portion 536 rotates about the engagement point Pe2 (see FIGS. 5 and 7). The coil portion 533 at the default position Ld is held in a state in which the coil center line Cc is inclined as shown in FIG.

As shown in FIG. 1, the sensor unit 70 is configured by combining a rotor magnet 71 and a sensor element 72. The rotor magnet 71 is a permanent magnet that constantly forms a magnetic field. The rotor magnet 71 is embedded in the rotating body 525 so as to be integrally rotatable. The sensor element 72 is a magnetoelectric conversion element that detects a magnetic field and outputs a detection signal, such as a Hall element. The sensor element 72 is embedded in the body cover 32. The sensor element 72 is disposed inward of the main housing space 37 in the radial direction of the rotating body 525 and the guide body 526. Thus, the detection signal output from the sensor element 72 represents the rotational position of the rotating body 525 according to the opening degree of the fluid passage 2 opened and closed by the throttle valve body 10. Therefore, the external control circuit can obtain the opening degree of the fluid passage 2 according to the rotational position of the rotating body 525 based on the detection signal output from the sensor element 72.

Next, the wear suppressing structure for suppressing the wear due to the pressing of the coil portion 533 to the guide body 526 will be described in detail. As shown in FIGS. 5 and 6, the guide body 526 has an escape portion 524 for escaping the coil portion 533.

Specifically, the relief portion 524 is provided at an end of the guide body 526 on the rotating body 525 side, biased to the rotating body 525 side in the axial direction along the rotation center line Cr. Thus, the relief portion 524 is located radially inward with respect to the first turn portion 535 on the side of the first hook 531 in the coil portion 533. At the same time, the relief portion 524 is disengaged from the radially inner side with respect to the coil remaining portion 537 other than the

first turn portions

535 and 536 on both sides of the coil portion 533 and the first turn portion 536 on the second hook 532 side. ing.

The escape portion 524 is formed so as to extend to a portion of the guide body 526 that is less than 1⁄4 of the circumference around the rotation center line Cr. The portion where the escape portion 524 is formed is set in advance at a position including the contact point Pc1 on the tangent plane Sc1 shown in FIG. Here, the tangent plane Sc1 is defined as a virtual plane passing through the portion Pe1 where the first hook portion 531 engages with the movable engagement portion 528 as the engagement target at the default position Ld. Further, the outer peripheral surface 529 (see FIGS. 5 to 7) located radially inward of the coil remaining portion 537 in the guide body 526 is projected on the cylindrical virtual peripheral surface Sp formed along the rotation center line Cr. A contact point Pc1 is defined as a virtual point where the tangent plane Sc1 at the position Ld is closer to the engagement target than the first hook portion 531.

Thus, the relief portion 524 provided at the contact point Pc1 on the tangential plane Sc1 is recessed in the guide body 526 from the outer circumferential surface 529 on the radially inner side of the coil remaining portion 537. In particular, the relief portion 524 of the first embodiment is in the form of a concave groove opened radially outward in the guide body 526 and having a concave bottom surface 524a radially inward with respect to the rotation center line Cr. Thus, at the radially inner side with respect to the first turn portion 535 on the side of the first hook 531, a relief portion 524 having a diameter smaller than the radial inner side with respect to the coil remaining portion 537 is formed around the rotation center line Cr in the guide body 526. It is possible to demonstrate the escape function by a part. Although the concave bottom surface 524a shown in FIGS. 6 and 7 extends in a planar manner, it may extend in the shape of a circular arc (for example, see FIG. 19 described later) around the rotation center line Cr.

Hereinafter, the operation and effect of the first embodiment will be described.

According to the first embodiment, the escape portion 524 formed on the guide body 526 at the radially inner side of the first turn portion 535 on the first hook portion 531 side in the coil portion 533 is intended to abut the guide body 526. Coil portion 533 can be released. According to this, the first hook portion 531 and the second hook portion 532 engage with the movable engagement portion 528 to be engaged at the default position Ld to receive a reaction force, thereby centering on the engagement portion Pe1. Even with the coil portion 533 that is to be rotated, it is difficult for the guide body 526 to be pressed. Therefore, it is possible to suppress a situation where the coil portion 533 slides on the guide body 526 to cause wear when the rotating body 525 rotates from the default position Ld.

Further, according to the first embodiment, a virtual peripheral surface formed by projecting the outer peripheral surface 529 other than the escape portion 524 in the guide body 526 with the tangent plane Sc1 passing through the engagement portion Pe1 between the first hook portion 531 and the engagement target. At the default position Ld in which the contact point Pc1 on the engagement target side of the first hook portion 531 is in contact with Sp, the escape portion 524 is positioned at a position including the contact point Pc1. According to this, when the first hook portion 531 engages with the engagement target at the default position Ld and receives a reaction force, the first turn portion 535 of the coil portion 533 on the first hook portion 531 side is engaged. It rotates toward the relief portion 524 of the contact point Pc1 about the joint point Pe1. Therefore, the first winding portion 535 on the side of the first hook portion 531 in the coil portion 533 is released by the release portion 524 positioned on the rotation side centering on the engagement point Pe1, and the pressing on the guide body 526 is restricted. As a result, it is possible to improve the reliability of the wear suppression effect.

Furthermore, according to the first embodiment, in the first turn portion 535 on the side of the first hook portion 531 engaged with the fixed engagement portion 330 in the coil portion 533 of the small rotation region Rs shifted from the default position Ld, the default position Ld. Rotation in the small rotation area Rs easily affects the pressing on the guide body 526 in the small rotation area Rs. However, in the small rotation region Rs, the first winding portion 535 on the side of the first hook portion 531 can be released by the escape portion 524 located radially inward and the pressure on the guide body 526 can be restricted. It is possible to raise

Furthermore, according to the first embodiment, the first hook portion 531 is fixed in the small rotation region Rs on the side where the rotation angle permitted by the rotating body 525 is small among the rotation regions Rs and Rl on both sides sandwiching the default position Ld. The engagement portion 330 is engaged. At this time, when the first turn portion 535 on the first hook portion 531 side rotated at the default position Ld is pressed by the guide body 526, not only the wear in the small rotation region Rs, but also the torsion coil spring 53 Hysteresis caused by frictional resistance occurs in the restoring force that is generated. In such a case, there is a concern that the restoring force of the torsion coil spring 53 is insufficient. However, the first winding portion 535 on the side of the first hook portion 531 according to the first embodiment can be released by the release portion 524 located radially inward at the default position Ld, and the pressure on the guide body 526 can be restricted. . Therefore, it is possible not only to enhance the wear suppression effect but also to avoid the insufficient recovery force of the torsion coil spring 53 due to the hysteresis.

In addition, according to the first embodiment, in the first turn portion 535 on the first hook portion 531 side engaged with the movable engagement portion 528 in the coil portion 533 of the large rotation area Rl shifted from the default position Ld, the default position Ld There is a possibility that the rotation at the time of rotation affects the pressing on the guide body 526 in the large rotation area Rl. However, in the large rotation area Rl, the first winding portion 535 on the side of the first hook portion 531 can be released by the escape portion 524 located radially inward to restrict the pressing on the guide body 526, so the wear suppressing effect is exhibited. It becomes possible.

According to the first embodiment, the contact of the coil portion 533 is alleviated in the guide body 526 whose diameter is reduced radially inside the first turn portion 535 on the first hook portion 531 side in the coil portion 533. obtain. According to this, the first hook portion 531 and the second hook portion 532 engage with the movable engagement portion 528 to be engaged at the default position Ld to receive a reaction force, thereby centering on the engagement portion Pe1. Even with the coil portion 533 that is to be rotated, it is difficult for the guide body 526 to be pressed. Therefore, it is possible to suppress a situation where the coil portion 533 slides on the guide body 526 to cause wear when the rotating body 525 rotates from the default position Ld.

Further, according to the first embodiment, in the first turn portion 535 on the first hook portion 531 side engaged with the fixed engagement portion 330 in the coil portion 533 of the small rotation area Rs, rotation at the default position Ld as described above Is likely to affect the pressure on the guide body 526 in the small rotation region Rs. However, in the first rotation portion 535 on the side of the first hook portion 531 in the small rotation region Rs, the contact with the guide body 526 reduced in diameter in the radial direction is alleviated, and the pressure on the guide body 526 is restricted. As a result, it is possible to enhance the wear control effect.

Furthermore, according to the first embodiment, when the first hook portion 531 engages with the fixed engagement portion 330 in the small rotation area Rs, as described above, the first hook portion 531 that is easily rotated at the default position Ld. In the case where the winding portion 535 is pressed by the guide body 526, there is a concern that the restoring force is insufficient. However, in the first turn portion 535 on the first hook portion 531 side according to the first embodiment, the contact with the guide body 526 reduced in diameter in the radial direction is alleviated and the pressing on the guide body 526 is restricted. obtain. Therefore, it is possible not only to enhance the wear suppression effect but also to avoid the insufficient recovery force of the torsion coil spring 53 due to the hysteresis.

Furthermore, according to the first embodiment, in the first turn portion 535 on the first hook portion 531 side engaged with the movable engagement portion 528 in the coil portion 533 of the large rotation area Rl, the rotation at the default position Ld as described above However, there is a possibility that the pressure on the guide body 526 in the large rotation area Rl may be affected. However, in the first turn portion 535 on the first hook portion 531 side in the large rotation area Rl, the contact with the guide body 526 reduced in diameter in the radial direction may be alleviated and the pressure on the guide body 526 may be restricted. Therefore, it is possible to exhibit the wear suppression effect.

Second Embodiment
As shown in FIGS. 8 and 9, the second embodiment is a modification of the first embodiment. The guide body 2526 according to the second embodiment has a relief portion 2524 for escaping the coil portion 533 together with the relief portion 524 substantially the same as the first embodiment. The escape portion 524 is substantially the same as that described in the first embodiment.

Specifically, the relief portion 2524 is provided at the opposite end of the guide body 2526, biased to the opposite side to the rotating body 525 in the axial direction along the rotation center line Cr. Thus, the relief portion 2524 is positioned radially inward with respect to the first turn portion 536 on the second hook 532 portion side in the coil portion 533. At the same time, the relief portion 2524 is dislocated from the radially inner side with respect to the coil remaining portion 537 other than the

first turn portions

535 and 536 on both sides of the coil portion 533 and the first turn portion 535 on the first hook 532 side. ing.

The relief portion 2524 is a portion which is within a range of less than 1⁄4 turn around the rotation center line Cr in the guide body 2526 and is formed so as to spread over a portion shifted around the rotation center line Cr with the release portion 524 There is. The portion where the escape portion 2524 is formed is set in advance at a position including the contact point Pc2 on the tangent plane Sc2 shown in FIG. Here, a tangent plane Sc2 is defined as a virtual plane passing through the point Pe2 where the second hook portion 532 engages with the movable engagement portion 528 as the engagement target at the default position Ld. In addition, a tangent plane Sc2 at the default position Ld is on a cylindrical virtual circumferential surface Sp formed by projecting an outer circumferential surface 529 (see FIGS. 8 and 9) located radially inward of the coil remaining portion 537 in the guide body 2526. A contact point Pc2 is defined as a virtual point in contact with the engagement target side with respect to the second hook portion 532.

Thus, the relief portion 2524 provided at the contact point Pc2 on the tangent plane Sc2 is recessed in the guide body 2526 more than the outer circumferential surface 529 on the radially inner side of the coil remaining portion 537. In particular, the relief portion 2524 of the second embodiment has a groove shape which is opened radially outward in the guide body 2526 and has a concave bottom surface 2524 a radially inward with respect to the rotation center line Cr. Thus, at the radially inner side with respect to the first turn portion 536 on the second hook 532 portion side, the escape portion 2524 which is smaller in diameter than the radial inner side with respect to the coil remaining portion 537, around the rotation center line Cr in the guide body 2526 It is possible to demonstrate the escape function by a part. Although the concave bottom surface 2524a shown in FIGS. 8 and 9 extends in a planar manner, it may extend in a circular arc around the rotation center line Cr.

Hereinafter, the operation and effect specific to the second embodiment will be described.

According to the second embodiment, the escape portion 2524 formed on the guide body 2526 at the radially inner side of the first turn portion 536 on the second hook portion 532 side in the coil portion 533 tries to abut the guide body 2526. Coil portion 533 can be released. According to this, the first hook portion 531 and the second hook portion 532 engage with the movable engagement portion 528 to be engaged at the default position Ld to receive a reaction force, thereby centering on the engagement portion Pe2. Even with the coil portion 533 that is to be rotated, it is difficult for the guide body 2526 to be pressed. Therefore, it is possible to suppress a situation where the coil portion 533 slides on the guide body 2526 and causes wear when the rotating body 525 rotates from the default position Ld.

Further, according to the second embodiment, a virtual plane obtained by projecting the outer peripheral surface 529 other than the

escape portions

524 and 2524 in the guide body 2526 is a tangential plane Sc2 passing through the second hook portion 532 and the engagement portion Pe2 between the engagement target. At the default position Ld in contact with the circumferential surface Sp at the contact point Pc2 on the engagement target side with respect to the second hook portion 532, the escape portion 2524 is positioned at a location including the contact point Pc2. According to this, when the second hook portion 532 engages with the engagement target at the default position Ld and receives a reaction force, the first turn portion 536 on the second hook portion 532 side in the coil portion 533 is engaged. It rotates toward the relief 2524 of the contact point Pc2 about the joint point Pe2. Therefore, the first turn portion 536 on the second hook portion 532 side in the coil portion 533 is released by the release portion 2524 located on the rotation side centering on the engagement point Pe2, and the pressing on the guide body 2526 is restricted. As a result, it is possible to improve the reliability of the wear suppression effect.

Furthermore, according to the second embodiment, in the first turn portion 536 on the second hook portion 532 side engaged with the fixed engagement portion 330 in the coil portion 533 of the large rotation area Rl shifted from the default position Ld, in the default position Ld. Rotation easily affects the pressing on the guide body 2526 in the large rotation area Rl. However, since the first winding portion 536 on the second hook portion 532 side in the large rotation area Rl can be released by the escaping portion 2524 located radially inward and the pressing on the guide body 2526 can be regulated, the wear suppressing effect can be obtained. It is possible to enhance.

In addition, according to the second embodiment, in the first turn portion 536 on the second hook portion 532 side engaged with the movable engagement portion 528 in the coil portion 533 of the small rotation area Rs shifted from the default position Ld, the default position The rotation at Ld may affect the pressing on the guide body 2526 in the small rotation area Rs. However, in the small rotation region Rs, the first winding portion 536 on the second hook portion 532 side can be released by the escape portion 2524 located radially inward to restrict the pressure on the guide body 2526, so the wear suppressing effect is exhibited. It is possible to

According to the second embodiment, the contact of the coil portion 533 is reduced in the guide body 2526 whose diameter is reduced radially inward with respect to the first turn portion 536 on the second hook portion 532 side in the coil portion 533. It can be done. According to this, the first hook portion 531 and the second hook portion 532 engage with the movable engagement portion 528 to be engaged at the default position Ld to receive a reaction force, thereby centering on the engagement portion Pe2. Even with the coil portion 533 that is to be rotated, it is difficult for the guide body 2526 to be pressed. Therefore, it is possible to suppress a situation where the coil portion 533 slides on the guide body 2526 and causes wear when the rotating body 525 rotates from the default position Ld.

Further, according to the second embodiment, in the first turn portion 536 on the second hook portion 532 side engaged with the fixed engagement portion 330 in the coil portion 533 of the large rotation area Rl, the rotation at the default position Ld is performed as described above. It easily affects the pressing on the guide body 2526 in the large rotation area Rl. However, in the first turn portion 536 on the second hook portion 532 side in the large rotation area Rl, the contact with the guide body 2526 reduced in diameter in the radial direction can be alleviated and the pressure on the guide body 2526 can be restricted. Therefore, it is possible to enhance the wear suppression effect.

Furthermore, according to the second embodiment, in the first turn portion 536 on the second hook portion 532 side engaged with the movable engagement portion 528 in the coil portion 533 of the small rotation area Rs, rotation at the default position Ld as described above There is a possibility that the pressure on the guide body 2526 in the small rotation area Rs may be affected. However, in the first rotation portion 536 on the second hook portion 532 side in the small rotation area Rs, the contact with the guide body 2526 reduced in diameter in the radial direction is relaxed and the pressure on the guide body 2526 is restricted. As a result, it is possible to exhibit the wear suppression effect.

Third Embodiment
As shown in FIG. 10, the third embodiment is a modification of the first embodiment. The guide body 3526 of the third embodiment gives the escape portion 3524 located radially inward to the first turn portion 535 on the first hook 531 side a shape different from that of the escape portion 524 of the first embodiment. ing.

Specifically, the relief portion 3524 is in the form of a concave groove which is open radially outward in the guide body 526 and in which the concave bottom surface 3524 a radially inward with respect to the rotation center line Cr is inclined. In the relief portion 3524 of the third embodiment, in particular, the coil portion 533 in the axial direction along the rotation center line Cr of the guide body 3526 is recessed toward the rotation center line Cr as it approaches the coil end surface 3533a on the rotary body 525 side. The bottom surface 3524a is inclined. In particular, in the relief portion 3524 of the third embodiment, the inclination range of the concave bottom surface 3524a in the axial direction of the guide body 3526 is substantially limited to the inside in the radial direction with respect to the first turn portion 535 on the first hook 531 side. Although the concave bottom surface 3524a of the relief portion 3524 spreads in a tapered shape around the rotation center line Cr as shown in FIG. 10, it may spread in a planar shape. The configuration other than that described above for the escape portion 3524 is substantially the same as the escape portion 524 described in the first embodiment.

The operation and effect specific to the third embodiment will be described below.

According to the third embodiment, the first winding portion 535 on the first hook portion 531 side at the default position Ld at the time of assembly is a relief portion inclined toward the rotation center line Cr of the guide body 3526 as it approaches the coil end surface 3533a. Being guided by the 3524 makes it difficult to tilt. According to this, in particular, the first turn portion 535 is less likely to be pressed by the guide body 3526, so that the wear suppressing effect can be enhanced.

Fourth Embodiment
As shown in FIG. 11, the fourth embodiment is a modification of the third embodiment.

In the guide body 4526 of the fourth embodiment, the escape portion 4524 located radially inward with respect to the first turn portion 535 on the first hook 531 portion side has an inclined aspect different from that of the escape portion 3524 of the third embodiment. It is giving.

Specifically, in the relief portion 4524, the inclination range of the concave bottom surface 4524a that inclines toward the rotation center line Cr as it approaches the coil end surface 3533a is from the inside in the radial direction with respect to the first winding portion 535 on the first hook 531 side. It extends continuously to the inside in the radial direction with respect to the first turn portion 536 on the side of the two hooks 532. Thus, at the default position Ld, the relief portion 4524 is formed so that the concave bottom surface 4524a is also inclined along the coil center line Cc of the coil portion 533 inclined by substantially the same principle as the first embodiment. There is. Incidentally, as shown in FIG. 11, the concave bottom surface 4524a of the relief portion 4524 spreads in a tapered shape around the rotation center line Cr. Further, the escape portion 4524 is the first hook portion at the contact surface Sc1 (not shown) at the default position Ld with respect to the outer peripheral surface 4529 other than the escape portion 4524 at the end opposite to the rotating body 525 of the guide body 4526 It is provided at a location including the contact point Pc1 that contacts on the engagement target side more than 531. Furthermore, the configuration other than that described above for the escape portion 4524 is substantially the same as the escape portion 3524 described in the third embodiment.

Hereinafter, the operation and effect specific to the fourth embodiment will be described.

At the default position Ld of the fourth embodiment, the escape portion 4524 is inclined along the coil center line Cc of the coil portion 533 so that the rotating coil portion 533 is in the first turn portion 535 on the first hook portion 531 side. Otherwise, the force exerted on the guide body 4526 may be dispersed. According to this, when the portion other than the first turn portion 535 in the coil portion 533 is pressed by the guide body 4526, the posture of the coil portion 533 is broken and the wear in the first turn portion 535 is easily caused. , Can be suppressed.

Fifth Embodiment
As shown in FIGS. 12 and 13, the fifth embodiment is a modification of the first embodiment. If the guide body 5526 of the fifth embodiment is different from the formation range of the escape portion 5524 located radially inward with respect to the first turn portion 535 on the first hook 531 portion side from the escape portion 524 of the first embodiment I'm sorry.

Specifically, the relief portion 5524 is formed so as to spread over the entire circumferential portion of the guide body 5526 which is the entire area around the rotation center line Cr. Thus, the relief portion 5524 is provided at a location including the contact point Pc1 on the tangential plane Sc1, as shown in FIG. The concave bottom surface 5524a of the relief portion 5524 extends in a cylindrical shape around the rotation center line Cr, as shown in FIGS. Further, the configuration other than that described above for the escape portion 5524 is substantially the same as the escape portion 524 described in the first embodiment, so that the fifth embodiment can exhibit the same function and effect as the first embodiment. Become.

Sixth Embodiment
As shown in FIG. 14, the sixth embodiment is a modification of the fifth embodiment. The guide body 6526 of the sixth embodiment is formed separately from the final stage gear 6523 having the rotating body 6525.

Specifically, in addition to the meshing portion 527 and the movable engagement portion 528, the rotating body 6525 of the final stage gear 6523 has a bearing portion 6527. The bearing portion 6527 is formed in a cylindrical shape that is continuous around the rotation center line Cr in the main housing space 37 (not shown). The bearing portion 6527 is integrally formed coaxially with the meshing portion 527. The bearing portion 6527 is coaxially fixed to the valve stem 20 (not shown) and can be integrated. The configuration other than that described above for the rotating body 6525 and the final stage gear 6523 including the same is substantially the same as the rotating body 525 described in the first embodiment and the final stage gear 523 including the same.

The guide body 6526 is radially supported by the outer peripheral surface of the bearing portion 6527 by being slidably fitted from the outside in the radial direction to the bearing portion 6527 instead of being attached to the valve shaft 20. The configuration other than that described above for the guide body 6526 is substantially the same as the guide body 5526 described in the fifth embodiment.

The effects and advantages unique to the sixth embodiment will be described below.

According to the sixth embodiment, it is possible to form the guide body 6526 separately from the common rotating body 6525 regardless of the product specification and make the diameter reduction structure of the guide body 6526 different for each product specification. According to this, it is possible to increase the versatility of the product parts.

Seventh Embodiment
As shown in FIGS. 15 and 16, the seventh embodiment is a modification of the second embodiment. The guide body 7526 of the sixth embodiment is different from the formation of the relief portion 7524 located radially inward with respect to the first turn portion 536 on the second hook 532 portion side from the relief portion 2524 of the second embodiment. I'm sorry.

Specifically, the relief portion 7524 is formed on the entire circumference of the guide body 7526, which is the entire area around the rotation center line Cr. Thus, the relief portion 7524 is provided at a location including the contact point Pc2 on the tangential plane Sc2, as shown in FIG. Incidentally, as shown in FIGS. 15 and 16, the concave bottom surface 7524a of the relief portion 7524 extends in a cylindrical shape around the rotation center line Cr. Further, since the configuration other than that described for the escape portion 7524 is substantially the same as the escape portion 2524 described in the second embodiment, the sixth embodiment can exhibit the same function and effect as the second embodiment. Become.

As mentioned above, although a plurality of embodiments were described, the present disclosure should not be construed as being limited to these embodiments, and applied to various embodiments and combinations within the scope of the gist of the present disclosure. Can. Modifications 1 to 14 of the above embodiment will be described.

Specifically, in the first modification to the first to fourth embodiments, in addition to the locations including the contacts Pc1 and Pc2, the escaped

portions

524, 2524, 352, and 4524 are provided at at least one location not including the contacts Pc1 and Pc2. It may be provided. Here, FIG. 17 shows the first modification in which the escape portions 524 are provided at two substantially equal intervals around the rotation center line Cr in the first embodiment. Moreover, FIG. 18 has shown the modification 1 in which the escape part 524 was provided in four places around rotation-center-line Cr regarding 1st Embodiment.

In the second modification of the first to fourth embodiments, the

relief portions

524, 2524, 3524, and 4524 may be formed to extend in a range of 1⁄4 or more and less than the entire circumference around the rotation center line Cr. . Here, FIG. 19 relates to the range of 1/2 circumference (that is, 180 °) around the rotation center line Cr in consideration of the extraction direction of the molding die after resin molding of the guide body 526, for example, regarding the first embodiment. The modification 2 in which the escape part 524 was formed is shown. As in the first modification to the first embodiment shown in FIG. 19 and the first to fourth embodiments described above, the formation range of the

relief portions

524, 2524, 3542 and 4524 is within a range of 1/2 round or less around the rotation center line Cr. The limitation is advantageous in terms of the guiding property of the coil portion 533.

In the third modification of the second embodiment, at least one of the

escape portions

524 and 2524 may be inclined in accordance with the third or fourth embodiment. Here, in FIGS. 20 and 21, in addition to the escape portion 524 having substantially the same configuration as that of the third or fourth embodiment, the guide body 2526 is closer to the coil end face 2533 a of the coil portion 533 opposite to the rotating body 525. The modification 3 in which the escape part 2524 which inclines to the rotation-center-line Cr side is provided is shown. Furthermore, in FIG. 21, in addition to the escape portion 524 having substantially the same configuration as that of the fourth embodiment, a modification provided with an escape portion 2524 that is inclined along the coil center line Cc of the coil portion 533 at the default position Ld. Example 3 is shown.

In Modification 4 of the first to fourth embodiments, the

guide bodies

526, 2526, 3526, 4526 may be formed separately from the rotating body 525 according to the sixth embodiment. Here, FIG. 22 shows a fourth modification in which the guide body 526 is formed separately from the rotating body 525 in the first embodiment.

In Modification 5 of the first to seventh embodiments, the

escape portions

524, 2524, 3542, and 4524 are provided on a portion radially inward of the coil remaining portion 537 other than the

first turn portions

535 and 536 in the coil portion 533. , 5524, 7524 may be located. Here, FIG. 23 shows a fifth modification in which the escape portion 7524 is positioned at a portion radially inward of the coil remaining portion 537 in the seventh embodiment.

In the coil portion 533 of the sixth modification related to the first to seventh embodiments, at least one of the

first turn portions

535 and 536 on the side provided with the

escape portions

524, 2524, 3524, 452, 4552, and 5524 is one of them. The diameter may be larger than that of the remaining coil portion 537 other than the first turn portion. Here, FIG. 24 shows Modification 6 in which at least the

first turn portions

535 and 536 are expanded in diameter according to the seventh embodiment.

In the seventh modification related to the second embodiment, as shown in FIG. 25, a relief portion 524 positioned radially inward is provided with respect to the first turn portion 535 on the first hook portion 531 side in the coil portion 533. It does not have to be. Although not shown here, in the seventh modification, the relief portion 2524 may be inclined according to the third or fourth embodiment (that is, according to the third modification). Although not shown, in the seventh modification, the guide body 2526 may be formed separately from the rotating body 525 according to the sixth embodiment (that is, according to the fourth modification).

In Modified Example 8 of the seventh embodiment, as shown in FIG. 26, an escape portion 524 located radially inward is provided with respect to the first turn portion 535 on the first hook portion 531 side of the coil portion 533. It does not have to be. Although not shown here, in the eighth modification, the guide body 7526 may be formed separately from the rotating body 525 according to the sixth embodiment (that is, according to the fourth modification).

In Modified Example 9 of the sixth embodiment, as shown in FIG. 27, the diameter of the guide body 6526 is gradually increased as it is separated from the rotating body 6525 side in the axial direction along the rotation center line Cr to the opposite side. May be In Modified Example 10 of the sixth embodiment, as shown in FIG. 28, a part of the guide body 6526 is the outer periphery on the radially inner side of the coil remaining portion 537 other than the

first turn portions

535 and 536 in the coil portion 533 The diameter may be smaller than that of the surface 529.

In Modified Example 11 of the first to seventh embodiments, the fixed engagement portion 330 may be disposed radially inward of the movable engagement portion 528. In addition to or instead of engaging at least one of the

first turn portions

535 and 536 of the coil portion 533 with the movable engagement portion 528 in the default position Ld of the modified example 12 of the first to seventh embodiments, The fixed engagement portion 330 may be engaged.

In the thirteenth modification of the first to seventh embodiments, one of the rotation regions Rl and Rs may not be set. Here, at the default position Ld of the modified example 13 in which the small rotation area Rs is not set, the first hook portion 531 is replaced by the movable engaging portion 528 instead of the engagement mode described in the first embodiment or modified example 12. The second hook portion 532 may be engaged and engaged with the fixed engagement portion 330. Further, at the default position Ld of the modified example 13 in which the large rotation area Rl is not set, the first hook portion 531 is engaged with the fixed engaging portion 330 instead of the engagement mode described in the first embodiment or the modified example 12. And the second hook portion 532 may engage with the movable engagement portion 528.

In the fourteenth modification of the first to seventh embodiments, the present disclosure may be applied to, for example, a throttle valve device having a fluid passage 2 through which exhaust gas of an internal combustion engine flows. Here, the exhaust gas recirculation (EGR (Exhaust Gas Recirculation) device) is a throttle valve device having a fluid passage 2 through which exhaust gas flows as modification 14 or exhaust gas flows as modification 14 and also intake air It is an example of a throttling valve device having a fluid passage 2 flowing therethrough.

Although the present disclosure has been described based on the examples, it is understood that the present disclosure is not limited to the examples and structures. The present disclosure also includes various modifications and variations within the equivalent range. In addition, various combinations and forms, and further, other combinations and forms including only one element, or more or less than these elements are also within the scope and the scope of the present disclosure.

Claims

A valve body (30) having a fixed engagement portion (330) and forming a fluid passage (2);
A throttle valve body (10) for increasing or decreasing the degree of opening of the fluid passage;
A rotating body (525, 525) having a movable engaging portion (528) and integrally rotating with the throttle valve body;
A torsion coil spring (53) having a coil portion (533) between the first hook portion (531) and the second hook portion (532);
And a guide body (526, 2526, 3526, 4526, 5526, 6526, 7526) for guiding the coil section from the inner side in the radial direction,
When the rotating body is localized at the default position (Ld) due to the disappearance of the driving force, the first hook portion and the second hook portion are respectively at least one of the fixed engagement portion and the movable engagement portion. And when the rotating body is rotated from the default position due to the generation of the driving force, the first hook portion and the second hook portion respectively correspond to the fixed engagement portion and the movable engagement portion. Engage with one of the
The guide body is provided radially inward of at least one of a first turn portion (535) on the first hook portion side and a first turn portion (536) on the second hook portion side of the coil portion. A throttle valve device having relief portions (524, 2524, 3524, 4524, 5524, 7524) for releasing coil portions.
A contact plane (Sc1) passing through an engagement point at which the first hook portion engages with the engagement target which is at least one of the fixed engagement portion and the movable engagement portion at the default position is the guide body The outer peripheral surface (529, 4529) other than the escape portion (524, 3524, 4524, 5524) in (526, 2526, 3526, 4526, 5526, 5625, 6526, 5526) is taken along the center line (Cr) of the guide body. Contact with the virtual peripheral surface (Sp) formed by projecting at the contact point (Pc1) on the engagement target side with respect to the first hook portion,
The throttle valve according to claim 1, wherein the relief portion located radially inward with respect to the first turn portion (535) on the first hook portion side in the coil portion is provided at a location including the contact point. apparatus.
A contact plane (Sc2) passing through an engagement point at which the second hook portion engages with the engagement target which is at least one of the fixed engagement portion and the movable engagement portion at the default position is the guide body An outer peripheral surface (529) other than the escape portion (2524, 7524) in (2526, 7526) is projected onto the virtual peripheral surface (Sp) formed by projecting along the center line (Cr) of the guide body. Contact at the contact point (Pc2) on the engagement target side with respect to the hook portion,
The throttle valve according to claim 1, wherein the relief portion positioned radially inward with respect to the first turn portion (536) on the second hook portion side in the coil portion is provided at a location including the contact point. apparatus.
The guide according to any one of claims 1 to 3, wherein the escape portion (3524, 4524) is inclined toward the center line (Cr) of the guide body (3526, 4526) as it approaches the coil end face (533a, 3533a) of the coil portion. The throttle valve device according to any one of the preceding claims.
The throttle valve device according to claim 4, wherein in the default position, the relief portion (4524) is inclined along the center line (Cc) of the coil portion.
The first hook portion and the second hook portion respectively engage with the fixed engagement portion and the movable engagement portion in the rotation area (Ps) shifted from the default position,
The said escape part (524, 3524, 4524, 5524) is located inside radial direction with respect to the 1st roll part (535) by the side of the said 1st hook part in the said coil part. The throttle valve device according to the above item.
Of the rotation areas (Ps, Pl) on both sides of the default position, the first hook portion and the second hook portion in the rotation area (Ps) on the side where the rotation angle permitted by the rotating body is smaller The throttle valve device according to claim 6, wherein each of the first and second engagement members engages with the fixed engagement portion and the movable engagement portion.
The first hook portion and the second hook portion engage with the movable engagement portion and the fixed engagement portion, respectively, in the rotation area (Pl) shifted from the default position,
The said escape part (524, 3524, 4524, 5524) is located inside radial direction with respect to the 1st roll part (535) by the side of the said 1st hook part in the said coil part. The throttle valve device according to the above item.
A valve body (30) having a fixed engagement portion (330) and forming a fluid passage (2);
A throttle valve body (10) for increasing or decreasing the degree of opening of the fluid passage;
A rotating body (525, 525) having a movable engaging portion (528) and integrally rotating with the throttle valve body;
A torsion coil spring (53) having a coil portion (533) between the first hook portion (531) and the second hook portion (532);
And a guide body (526, 2526, 3526, 4526, 5526, 6526, 7526) for guiding the coil section from the inner side in the radial direction,
When the rotating body is localized at the default position (Ld) due to the disappearance of the driving force, the first hook portion and the second hook portion are respectively at least one of the fixed engagement portion and the movable engagement portion. And when the rotating body is rotated from the default position due to the generation of the driving force, the first hook portion and the second hook portion respectively correspond to the fixed engagement portion and the movable engagement portion. Engage with one of the
The diameter of the guide body is reduced radially inside at least one of the first winding portion (535) on the first hook portion side and the first winding portion (536) on the second hook portion side in the coil portion. Throttle valve device.
The first hook portion and the second hook portion respectively engage with the fixed engagement portion and the movable engagement portion in the rotation area (Ps) shifted from the default position,
The guide body (526, 2526, 3526, 4526, 5526, 6526, 7526) is reduced in diameter radially inside the first winding portion (535) on the first hook portion side of the coil portion The throttle valve device according to Item 9.
Of the rotation areas (Ps, Pl) on both sides of the default position, the first hook portion and the second hook portion in the rotation area (Ps) on the side where the rotation angle permitted by the rotating body is smaller The throttle valve device according to claim 10, wherein each of the first and second engagement members engages with the fixed engagement portion and the movable engagement portion.
The first hook portion and the second hook portion engage with the movable engagement portion and the fixed engagement portion, respectively, in the rotation area (Pl) shifted from the default position,
The guide body (526, 2526, 3526, 4526, 5526, 6526, 7526) is reduced in diameter radially inside the first winding portion (535) on the first hook portion side of the coil portion The throttle valve device according to Item 9.
The throttle valve device according to any one of claims 1 to 12, wherein the guide body (6526) is formed separately from the rotating body.