WO2017212526A1

WO2017212526A1 - Turbo actuator

Info

Publication number: WO2017212526A1
Application number: PCT/JP2016/066774
Authority: WO
Inventors: 信吾渡邊
Original assignee: 三菱電機株式会社
Priority date: 2016-06-06
Filing date: 2016-06-06
Publication date: 2017-12-14
Also published as: JPWO2017212526A1; JP6611935B2

Abstract

A turbo actuator (100) comprises: a rod (2) capable of being rectilinearly moved in the axial direction by an actuator body (1); a joint (3) having a rod insertion section (31) which has a closed-end cylindrical shape and in which the front end of the rod (2) is inserted, the joint (3) also having a lever mounting section (32) provided to the bottom of the rod insertion section (31); and an affixation section (6) inserted in a hole (35) formed in a side wall of the rod insertion section (31), the affixation section (6) being in pressure contact with the outer periphery of the front end. A male thread section (21) provided on the outer periphery of the front end and a female thread section (33) provided on the inner periphery of the rod insertion section (31) are engaged with each other, and the affixation section (6) is in pressure contact with the male thread section (21).

Description

Turbo actuator

The present invention relates to a turbo actuator.

Conventionally, a linear actuator that controls the opening degree of a waste gate valve provided in a turbocharger of an automobile engine, a so-called “turbo actuator” has been developed. For example, the turbocharger of Patent Document 1 has a rod (actuator rod 22) that can be directly moved by an actuator (air actuator 21). A lever (operating lever 23) for opening and closing a waste gate valve (exhaust gate valve 13) is attached to the tip of the rod.

The turbocharger of Patent Document 1 has a lever attached directly to the tip of the rod. In this case, since the root portion of the rod is joined to other components in a state of being crushed inside the actuator, for example, a hardness that is low enough to be crushed is required. On the other hand, since the lever is attached to the tip of the rod, higher hardness than the root is required. Therefore, in the manufacturing process of the rod, a curing process for curing only a part (tip portion) of the rod is required, and there is a problem that the manufacturing is difficult.

¡To solve this problem, a structure has been developed in which a joint that is a separate member from the rod is provided at the tip of the rod and a lever is attached to this joint. Thereby, the hardening process of a rod is unnecessary and the hardening process of a joint should just harden | cure the whole, and can manufacture easily. In addition, the joint provided on the rod and the separate member has a higher degree of freedom of molding than the joint integrally formed at the tip of the rod, and easily realizes the shape corresponding to the specifications of the lever and waste gate valve. be able to.

Japanese Patent Laid-Open No. 2003-41941

A turbo actuator provided with a joint that is separate from the rod has a waste gate valve opening degree relative to the linear movement position of the rod in accordance with the position of the joint in the linear movement direction relative to the rod (hereinafter simply referred to as “joint position”). Change. As a result, the engine output changes and the amount of exhaust gas also changes. For this reason, the joint position is adjusted to an appropriate position based on so-called “automobile exhaust gas regulations” in the manufacturing process of the turbocharger or the automobile. Further, the joint is positioned at the position after the adjustment using a hexagon nut passed through the rod.

In recent years, automobile emission regulations have been strengthened in various parts of the world such as the United States and Europe. Accordingly, there is a demand for a structure in which it is difficult to readjust the joint position after an automobile equipped with a turbocharger is shipped. Further, even if the joint position is readjusted, there is a demand for a structure in which the readjustment trace remains clearly.

Here, a conventional turbo actuator provided with a joint that is a separate member from the rod is covered with a metal sleeve at the joint between the rod and the joint, and is fixed between the rod and the joint by so-called “caulking”. Since this sleeve can be easily removed using a general-purpose tool such as a nipper, there is a problem that the joint position can be easily readjusted. In addition, there is a problem that no trace of readjustment remains in the main part of the turbo actuator, that is, in a part such as a rod or joint.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a structure in which it is difficult to readjust the joint position in a turbo actuator provided with a joint that is a separate member from the rod. .

The turbo actuator of the present invention includes a rod that can move linearly in the axial direction by the actuator body, a bottomed cylindrical rod insertion portion through which the tip of the rod is inserted, and a lever provided at the bottom of the rod insertion portion A joint having an attachment portion, and a fixing member inserted into a hole provided in a side wall portion of the rod insertion portion, and in pressure contact with the outer peripheral portion of the tip portion. The provided male screw part and the female screw part provided in the inner peripheral part of the rod insertion part are screwed together, and the fixing member is in pressure contact with the male screw part.

According to the present invention, it is possible to obtain a structure in which it is difficult to readjust the joint position in a turbo actuator provided with a joint that is a separate member from the rod.

It is a side view of the turbo actuator which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the principal part of the turbo actuator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the state before pressing the fixing member which concerns on Embodiment 1 of this invention into a hole. It is explanatory drawing which shows the state in the middle of pressing the fixing member which concerns on Embodiment 1 of this invention in a hole. It is explanatory drawing which shows the state after pressing the fixing member which concerns on Embodiment 1 of this invention in a hole. It is a side view of the turbo actuator which concerns on Embodiment 2 of this invention. It is a disassembled perspective view which shows the principal part of the turbo actuator which concerns on Embodiment 2 of this invention. It is a side view of the turbo actuator which concerns on Embodiment 3 of this invention. It is a disassembled perspective view which shows the principal part of the turbo actuator which concerns on Embodiment 3 of this invention. It is explanatory drawing which shows the state before pressing the fixing member which concerns on Embodiment 3 of this invention into a hole. It is explanatory drawing which shows the state in the middle of pressing-in the fixing member which concerns on Embodiment 3 of this invention in a hole. It is explanatory drawing which shows the state after pressing the fixing member which concerns on Embodiment 3 of this invention into a hole. It is a side view of the turbo actuator which concerns on Embodiment 4 of this invention. It is a disassembled perspective view which shows the principal part of the turbo actuator which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows the state before bending the fixing member which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows the state in the middle of bending the fixing member which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows the state which the bending of the fixing member which concerns on Embodiment 4 of this invention was completed.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 is a side view of a turbo actuator according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing a main part of the turbo actuator according to Embodiment 1 of the present invention. A turbo actuator 100 according to the first embodiment will be described with reference to FIGS. 1 and 2.

In the figure, 1 is the actuator body. The actuator body 1 is composed of, for example, a pneumatic linear actuator. That is, the actuator body 1 moves the substantially rod-shaped rod 2 protruding from the actuator body 1 along the axial direction of the rod 2.

One end of the rod 2 (hereinafter referred to as “root”) is joined to other components in a state of being crushed in the actuator body 1. The other end portion of the rod 2 (hereinafter referred to as “tip portion”) protrudes from the actuator body 1, and a male screw portion 21 is formed on the outer peripheral portion. The tip of the rod 2 is inserted into the rod insertion part 31 of the joint 3.

The joint 3 has a substantially bottomed cylindrical rod insertion part 31 and a substantially plate-like lever attachment part 32 provided at the bottom of the rod insertion part 31. A female screw portion 33 is provided on the inner peripheral portion of the rod insertion portion 31 and is screwed with the male screw portion 21 of the rod 2. A through hole 34 is formed in the lever mounting portion 32. The lever 5 is rotatably attached by the pin 4 passed through the through hole 34. The turbo actuator 100 controls the opening degree of a waste gate valve (not shown) through the lever 5 when the actuator body 1 moves the rod 2 directly.

A hole portion 35 is formed in the side wall portion of the rod insertion portion 31. The hole 35 in the first embodiment is a substantially cylindrical hole provided substantially perpendicular to the axial direction of the rod 2, and one end of the cylinder is open. The other end of the cylinder communicates with the hollow portion 30 of the rod insertion portion 31, and the male screw portion 21 of the rod 2 is exposed in the hole portion 35 at the communication portion.

A substantially disk-shaped fixing member 6 is inserted into the hole 35. Specifically, the diameter of the fixing member 6 is substantially equal to the diameter of the hole portion 35, and the fixing member 6 is press-fitted into the hole portion 35. Further, the fixing member 6 has one surface portion in pressure contact with the male screw portion 21 of the rod 2. The rod 2 is fixed to the joint 3 by pressure contact of the fixing member 6.

Here, the joint 3 and the fixing member 6 are made of a material harder than the rod 2. Specifically, for example, the rod 2 is made of carbon steel. The joint 3 is obtained by subjecting carbon steel similar to the rod 2 to a hardening process such as so-called “isonite treatment”, “nitriding treatment”, or “quenching”. The fixing member 6 is formed by the so-called “rolling process” using the same carbon steel as the rod 2.

Since the fixing member 6 is harder than the rod 2, the male screw portion 21 of the rod 2 is crushed at the part where the fixing member 6 is pressed. In this way, the main part of the turbo actuator 100 is configured.

Next, with reference to FIGS. 3 to 5, the assembling method of the main part of the turbo actuator 100 will be described focusing on the press-fitting method of the fixing member 6.

FIG. 3 shows a state before the fixing member 6 is press-fitted into the hole 35. As shown in FIG. 3, the distal end portion of the rod 2 is inserted into the rod insertion portion 31, and the male screw portion 21 and the female screw portion 33 are screwed together. In the state shown in FIG. 3, the joint position is adjusted to a position according to automobile exhaust gas regulations at the destination of the automobile on which the turbo actuator 100 is mounted. For press-fitting the fixing member 6, for example, a dedicated tool A is used.

FIG. 4 shows a state in the middle of pressing the fixing member 6 into the hole 35. As shown in FIG. 4, when the dedicated tool A presses the fixing member 6, the fixing member 6 is press-fitted into the hole 35.

FIG. 5 shows a state where the press-fitting of the fixing member 6 is completed. In the state shown in FIG. 5, one side portion of the fixing member 6 is in pressure contact with the male screw portion 21. In the male screw portion 21, the screw thread at the portion where the fixing member 6 is in pressure contact is crushed.

In this way, the press-fitting of the fixing member 6 is completed. For press-fitting the fixing member 6, a press machine (not shown) may be used instead of the dedicated tool A.

In the turbo actuator 100 according to the first embodiment, since the fixing member 6 is press-fitted into the hole 35, it is difficult to remove the fixing member 6. Therefore, the turbo actuator 100 in which readjustment of the joint position is difficult can be obtained. Further, if the joint position is forcibly readjusted without removing the fixing member 6, the screw thread in a portion different from the portion exposed in the hole portion 35 of the male screw portion 21 is crushed. Therefore, it is possible to obtain the turbo actuator 100 in which the trace of readjustment remains clearly on the rod 2.

The actuator body 1 may be a linear actuator that can freely open and close the waste gate valve, and is not limited to a pneumatic actuator. The actuator body 1 may be constituted by an electric actuator using a solenoid, for example.

1 and 2 show an example in which the substantially plate-like lever mounting portion 32 is provided along the axial direction of the rod 2, the lever mounting portion 32 is substantially perpendicular to the axial direction of the rod 2. It may be provided. That is, the installation angle of the lever attachment portion 32 with respect to the rod insertion portion 31 may be any angle as long as it corresponds to the specifications of the lever 5 and the waste gate valve, and may be provided at any angle. Moreover, the shape of the lever attaching part 32 should just be a shape corresponding to specifications, such as the lever 5 and a waste gate valve, and is not limited to substantially plate shape.

The material of the rod 2 may be any material as long as the hardness is low enough to crush the root portion and high enough to withstand the opening and closing of the waste gate valve by linear motion. It is not limited. The rod 2 may be made of, for example, stainless steel.

Further, the material of the joint 3 may be any material having a higher hardness than the rod 2, and is not limited to carbon steel subjected to hardening treatment. The joint 3 may be made of, for example, a hardened stainless steel.

Further, the material of the fixing member 6 may be any material as long as it has a hardness higher than that of the rod 2, and is not limited to carbon steel formed by rolling. The fixing member 6 may be made of, for example, stainless steel formed by rolling. Alternatively, the fixing member 6 may be made of carbon steel or stainless steel subjected to the same hardening treatment as the joint 3.

However, the material of the fixing member 6 is preferably the same material as the joint 3. Specifically, for example, when carbon steel is used for the joint 3, it is preferable that the fixing member 6 is also made of carbon steel. When stainless steel is used for the joint 3, the fixing member 6 is also made of stainless steel. Is preferred. By using the same material as the joint 3 for the fixing member 6, the thermal expansion coefficients of both parts can be made equal. Accordingly, it is possible to prevent a gap from being generated between the hole 35 and the fixing member 6 due to a temperature change, and to prevent the fixing member 6 from dropping from the hole 35.

Alternatively, a plurality of hole portions 35 may be provided in the side wall portion of the rod insertion portion 31, and the fixing member 6 may be inserted into each hole portion 35. By increasing the number of the fixing members 6, the rod 2 can be firmly fixed to the joint 3 and the re-adjustment trace in the rod 2 can be left more clearly.

Further, the shape of the hole 35 is not limited to a substantially cylindrical shape, and the shape of the fixing member 6 is not limited to a substantially disk shape. However, from the viewpoint of increasing the contact area between the hole 35 and the fixing member 6 and suppressing the dropping of the fixing member 6, it is preferable that the hole 35 and the fixing member 6 have shapes corresponding to each other. Specifically, for example, a structure in which a substantially square plate-shaped fixing member 6 is press-fitted into a substantially square columnar hole 35, or a substantially hexagonal plate-shaped fixing member 6 is press-fitted into the substantially hexagonal columnar hole 35. A suitable structure is preferable. In addition, the structure in which the substantially disc-shaped fixing member 6 is press-fitted into the substantially cylindrical hole 35 can further eliminate the step of determining the direction of the fixing member 6 in the rotational direction at the time of press-fitting, and thus is more preferable. is there.

Further, the rod insertion portion 31 of the joint 3 may be a substantially bottomed cylindrical shape as shown in FIGS. 1 and 2, and may not be a strict bottomed cylindrical shape. The meaning of the term “bottomed cylindrical shape” described in the claims of the present application is not limited to a strictly bottomed cylindrical shape, but includes a substantially bottomed cylindrical shape.

Further, the fixing member 6 may be a substantially disk shape as shown in FIGS. 1 and 2, and may not be a strict disk shape. The meaning of the term “disc shape” described in the claims of the present application is not limited to a strict disc shape, but also includes a substantially disc shape.

As described above, the turbo actuator 100 according to the first embodiment includes the rod 2 that is linearly movable along the axial direction by the actuator body 1 and the bottomed cylindrical rod insertion portion 31 through which the tip of the rod 2 is inserted. And the lever 3 provided at the bottom of the rod insertion part 31 and the hole 35 provided in the side wall of the rod insertion part 31, and the outer peripheral part of the tip part. The male screw portion 21 provided on the outer peripheral portion of the tip portion and the female screw portion 33 provided on the inner peripheral portion of the rod insertion portion 31 are screwed together. The fixing member 6 is in pressure contact with the male screw portion 21. This makes it difficult to readjust the joint position.

In addition, the male screw portion 21 has a crest of a screw thread where the fixing member 6 is pressed. Thereby, even if it is a case where a joint position is readjusted, the trace of readjustment can remain clearly in the rod 2. FIG.

Further, the fixing member 6 has a disk shape, and one surface portion of the fixing member 6 is in pressure contact with the male screw portion 21. Thereby, when the fixing member 6 is press-fitted into the hole portion 35, the step of determining the direction of the fixing member 6 in the rotation direction can be eliminated.

Embodiment 2. FIG.
FIG. 6 is a side view of the turbo actuator according to Embodiment 2 of the present invention. FIG. 7 is an exploded perspective view showing the main part of the turbo actuator according to Embodiment 2 of the present invention. A turbo actuator 101 according to the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structural member similar to the turbo actuator 100 shown in FIG.1 and FIG.2, and description is abbreviate | omitted.

In the hole 35 of the joint 3, a substantially disc-shaped fixing member 7 is inserted. Specifically, the diameter of the fixing member 7 is substantially equal to the diameter of the hole 35, and the fixing member 7 is press-fitted into the hole 35. One side portion of the fixing member 7 is in pressure contact with the male screw portion 21 of the rod 2. The rod 2 is fixed to the joint 3 by pressure contact of the fixing member 7.

Here, the fixing member 7 has an uneven surface portion formed on at least one surface portion. In the example of FIGS. 6 and 7, uneven surface portions are formed on both surface portions of the fixing member 7. Further, the unevenness on each uneven surface portion is formed by arranging substantially quadrangular pyramidal convex portions along two directions orthogonal to each other, that is, in a lattice shape. The concave / convex surface portion provided on one side portion of the fixing member 7 is in pressure contact with the male screw portion 21, and the convex portion of the concave / convex surface portion is engaged with the screw thread of the male screw portion 21.

Since the material of the fixing member 7 is the same as that of the fixing member 6 of the first embodiment, the description thereof is omitted. In this way, the turbo actuator 101 is configured.

Since the method for assembling the main part of the turbo actuator 101 is the same as that described with reference to FIGS. 3 to 5 in the first embodiment, illustration and description thereof are omitted. In the state corresponding to FIG. 5, that is, in the state where the fixing member 7 has been press-fitted, the male screw portion 21 of the rod 2 is engaged with the convex portion of the concave and convex surface portion at the portion where the fixing member 7 is pressed. ing.

In the turbo actuator 101 of the second embodiment, since the fixing member 7 is press-fitted into the hole 35, it is difficult to remove the fixing member 6. Therefore, it is possible to obtain the turbo actuator 101 in which it is difficult to readjust the joint position. Further, if the joint position is forcibly readjusted without removing the fixing member 7, the screw thread at the portion engaged with the uneven surface portion of the male screw portion 21 is damaged. Accordingly, it is possible to obtain the turbo actuator 101 in which the trace of readjustment remains clearly on the rod 2.

It should be noted that the fixing member 7 may have an uneven surface portion formed on only one surface portion, and the uneven surface portion may be in pressure contact with the male screw portion 21. However, providing uneven surfaces on both surface portions of the fixing member 7 eliminates the need for a step of discriminating the front and back of the fixing member 7 when the fixing member 7 is press-fitted into the hole 35. is there.

Further, the unevenness on the uneven surface portion of the fixing member 7 is not limited to the unevenness arranged along two directions orthogonal to each other as long as the unevenness is arranged along a plurality of non-parallel directions. That is, if the irregularities are arranged along only one direction, the arrangement direction of the irregularities may be along the screw thread of the male screw portion 21 in a state where the irregular surface portion is pressed against the male screw portion 21. There is. In this case, the rod 2 can be rotated with respect to the joint 3, and the joint position can be easily readjusted. By arranging the unevenness of the uneven surface portion along a plurality of non-parallel directions, it is possible to prevent such a situation from occurring.

Further, the shape of each convex portion in the uneven surface portion of the fixing member 7 is not limited to a substantially quadrangular pyramid shape. The convex portion may have any shape such as a substantially hemispherical shape, a substantially conical shape, a substantially cylindrical shape, a substantially polygonal pyramid shape, and a substantially polygonal columnar shape. Further, a plurality of types of convex portions having different shapes may be provided in combination.

Further, the meaning of the term “disc shape” described in the claims of the present application is not limited to a strict disc shape, but a substantially disc shape like the fixing member 7 shown in FIG. 6 or FIG. Is also included. The meaning of the term “quadrangular pyramid” described in the claims of the present application is not limited to a strict quadrangular pyramid shape, but a substantially quadrangular pyramid shape such as the uneven surface portion shown in FIG. Is also included.

In addition, the turbo actuator 101 according to the second embodiment can employ various modifications similar to those described in the first embodiment.

As described above, the turbo actuator 101 according to the second embodiment includes the rod 2 that is linearly movable along the axial direction by the actuator body 1 and the bottomed cylindrical rod insertion portion 31 through which the tip end portion of the rod 2 is inserted. And the lever 3 provided at the bottom of the rod insertion part 31 and the hole 35 provided in the side wall of the rod insertion part 31, and the outer peripheral part of the tip part. The male screw portion 21 provided on the outer peripheral portion of the tip portion and the female screw portion 33 provided on the inner peripheral portion of the rod insertion portion 31 are screwed together. The fixing member 7 is in pressure contact with the male screw portion 21. This makes it difficult to readjust the joint position.

Further, the fixing member 7 has an uneven surface portion, and the unevenness of the uneven surface portion and the screw thread of the male screw portion 21 are engaged with each other. Thereby, even if it is a case where a joint position is readjusted, the trace of readjustment can remain clearly in the rod 2. FIG.

Further, the irregularities in the irregular surface portion are arranged along a plurality of directions that are not parallel to each other. Thereby, it can prevent that the arrangement direction of an unevenness | corrugation will be in the state which follows the screw thread of the external thread part 21, and it can prevent that the readjustment of a joint position becomes easy.

Further, the fixing member 7 has a disk shape, and uneven surface portions are formed on both surface portions of the fixing member 7. Accordingly, when the fixing member 7 is press-fitted into the hole portion 35, a step of determining the direction of the fixing member 7 in the rotation direction can be made unnecessary. Moreover, the process of discriminating the front and back of the fixing member 7 can be eliminated.

Embodiment 3 FIG.
FIG. 8 is a side view of the turbo actuator according to Embodiment 3 of the present invention. FIG. 9 is an exploded perspective view showing the main part of the turbo actuator according to Embodiment 3 of the present invention. The turbo actuator 102 according to the third embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structural member similar to the turbo actuator 100 shown in FIG.1 and FIG.2, and description is abbreviate | omitted.

The first hole 36 and the second hole 37 are formed in the side wall of the rod insertion part 31. The first hole 36 is a substantially columnar hole provided substantially perpendicular to the axial direction of the rod 2, and one end of the column is open. A part of the side periphery of the cylinder communicates with the hollow part 30 of the rod insertion part 31, and the male screw part 21 of the rod 2 is exposed in the first hole part 36 at the communication part. . The second hole portion 37 has the same shape as that of the first hole portion 36 and is arranged substantially symmetrical with respect to the axis of the rod 2. Hereinafter, in the third embodiment, the first hole portion 36 and the second hole portion 37 may be collectively referred to simply as “hole portions”.

The fixing member 8 in the third embodiment is substantially U-shaped. That is, the fixing member 8 includes a substantially rod-shaped first leg portion 81, a substantially rod-shaped second leg portion 82 disposed substantially parallel to the first leg portion 81, and one end portion of the first leg portion 81. A connecting portion 83 connected to one end of the second leg portion 82; Hereinafter, in the third embodiment, the first leg 81 and the second leg 82 may be collectively referred to simply as “legs”.

The first leg 81 is inserted into the first hole 36, and the second leg 82 is inserted into the second hole 37. Specifically, the diameter of the first leg 81 is substantially the same as the diameter of the first hole 36, and the first leg 81 is press-fitted into the first hole 36. Further, the diameter of the second leg portion 82 is substantially equal to the diameter of the second hole portion 37, and the second leg portion 82 is press-fitted into the second hole portion 37. The connection portion 83 of the fixing member 8 is disposed outside the rod insertion portion 31.

Here, the first leg portion 81 is in pressure contact with a portion of the male screw portion 21 exposed in the first hole portion 36. The second leg portion 82 is in pressure contact with a portion of the male screw portion 21 exposed in the second hole portion 37. That is, of the two

leg portions

81 and 82 of the fixing member 8, each of the mutually facing surface portions is in pressure contact with the male screw portion 21. The rod 2 is fixed to the joint 3 by pressure contact between the

leg portions

81 and 82.

The fixing member 8 is made of the same material as the fixing member 6 of the first embodiment, that is, a material harder than the rod 2. For this reason, as for the male screw part 21, the screw thread of the site | part where the

leg parts

81 and 82 press-contacted is crushed. In this way, the main part of the turbo actuator 102 is configured.

Next, with reference to FIGS. 10 to 12, an assembling method of the main part of the turbo actuator 102 will be described focusing on the press-fitting method of the fixing member 8.

FIG. 10 shows a state before the

legs

81 and 82 are press-fitted into the

holes

36 and 37. As shown in FIG. 10, the distal end portion of the rod 2 is inserted into the rod insertion portion 31, and the male screw portion 21 and the female screw portion 33 are screwed together. In the state shown in FIG. 10, the joint position is adjusted to a position according to automobile exhaust gas regulations at the destination of the automobile on which the turbo actuator 102 is mounted. For press fitting of the

leg portions

81 and 82, for example, a dedicated tool B is used.

FIG. 11 shows a state in which the

leg portions

81 and 82 are being press-fitted into the

hole portions

36 and 37. As shown in FIG. 11, when the dedicated tool B presses the connection portion 83 of the fixing member 8, the

leg portions

81 and 82 are press-fitted into the

hole portions

36 and 37.

FIG. 12 shows a state where the press fitting of the

leg portions

81 and 82 is completed. In the state shown in FIG. 12, each of the facing surface portions of the

leg portions

81 and 82 is in pressure contact with the male screw portion 21. In the male screw portion 21, the screw thread at the portion where the

leg portions

81 and 82 are in pressure contact is crushed.

In this way, the press-fitting of the fixing member 8 is completed. For press-fitting the fixing member 8, a press machine (not shown) may be used instead of the dedicated tool B.

In the turbo actuator 102 of the third embodiment, since the

leg portions

81 and 82 are press-fitted into the

hole portions

36 and 37, it is difficult to remove the fixing member 8. Therefore, it is possible to obtain the turbo actuator 102 in which it is difficult to readjust the joint position. Further, if the joint position is forcibly readjusted without removing the fixing member 8, the screw thread in a portion different from the portion exposed in the

holes

36 and 37 in the male screw portion 21 is crushed. Accordingly, it is possible to obtain the turbo actuator 102 in which the trace of readjustment remains clearly on the rod 2.

Note that the fixing member 8 may be one in which an uneven surface portion is formed on each of the facing surface portions of the

leg portions

81 and 82. In this case, in a state where the

leg portions

81 and 82 are in pressure contact with the male screw portion 21, the unevenness of the uneven surface portion is engaged with the screw thread of the male screw portion 21. As a result, according to the same principle as the turbo actuator 101 of the second embodiment, it is possible to obtain a structure in which the readjustment trace remains clearly on the rod 2.

Further, the shape of the fixing member 8 may be substantially U-shaped as shown in FIGS. 8 and 9, and is not limited to a strict U-shape. The meaning of the term “U-shape” described in the claims of the present application is not limited to a strict U-shape but also includes a substantially U-shape.

Further, the fixing member 8 may be configured by two parts of the first leg portion 81 and the second leg portion 82 by removing the connecting portion 83 shown in FIGS. 8 and 9. In this case, when the

legs

81 and 82 are press-fitted into the

holes

36 and 37, the pair of dedicated tools B may press the first leg 81 and the second leg 82, respectively. At this time, from the viewpoint of preventing the rod 2 from rotating with respect to the joint 3 and the position of the rod 2 from shifting in the rod insertion portion 31, the two

legs

81 and 82 are substantially at the same level. It is preferable to press-fit with a force of. On the other hand, when the substantially U-shaped fixing member 8 is used, the dedicated tool B simply presses the connecting portion 83, so that the pressing timing and the pressing force of the

leg portions

81 and 82 can be aligned. The press-fitting can be made easier.

In addition, the turbo actuator 102 according to the third embodiment can employ various modifications similar to those described in the first embodiment.

As described above, the turbo actuator 102 according to the third embodiment includes the rod 2 that is linearly movable along the axial direction by the actuator body 1 and the bottomed cylindrical rod insertion portion 31 through which the tip of the rod 2 is inserted. And the lever mounting portion 32 provided at the bottom of the rod insertion portion 31, and the

holes

36 and 37 provided in the side wall portion of the rod insertion portion 31, and the tip portion A fixing member 8 in pressure contact with the outer peripheral portion, and a male screw portion 21 provided on the outer peripheral portion of the tip portion and a female screw portion 33 provided on the inner peripheral portion of the rod insertion portion 31 are screwed together. The fixing member 8 is in pressure contact with the male screw portion 21. This makes it difficult to readjust the joint position.

Further, the fixing member 8 is U-shaped, and each of the mutually facing surface portions of the two

leg portions

81 and 82 of the fixing member 8 is in pressure contact with the male screw portion 21. Thereby, even if it is a case where a joint position is readjusted, the trace of readjustment can remain clearly in the rod 2. FIG.

Embodiment 4 FIG.
FIG. 13 is a side view of a turbo actuator according to Embodiment 4 of the present invention. FIG. 14 is an exploded perspective view showing a main part of a turbo actuator according to Embodiment 4 of the present invention. A turbo actuator 103 according to the fourth embodiment will be described with reference to FIGS. 13 and 14. In addition, the same code | symbol is attached | subjected to the structural member similar to the turbo actuator 100 shown in FIG.1 and FIG.2, and description is abbreviate | omitted.

A slot-shaped first hole 38 along the axial direction of the rod 2 is formed in the side wall portion of the rod insertion portion 31. Further, a substantially cylindrical second hole 39 that penetrates the side wall of the rod insertion part 31 in communication with the first hole 38 is formed. That is, one end of the cylinder is open, and the other end of the cylinder communicates with the hollow portion 30 of the rod insertion portion 31. The male screw portion 21 of the rod 2 is exposed in the second hole portion 39 at the communication portion. Hereinafter, in the fourth embodiment, the first hole 38 and the second hole 39 may be collectively referred to simply as “hole”.

The substantially plate-shaped fixing member 9 is inserted into the slot-shaped first hole 38. That is, substantially the entire fixing member 9 is accommodated in the first hole 38. In addition, the fixing member 9 has a protrusion 91 for preventing the drop-off on at least one side. In the example of FIG.13 and FIG.14, the convex part 91 is formed in the single side | surface part by bend | folding a part of fixing member 9 in a waveform.

The fixing member 9 is bent so that the portion disposed in the second hole 39 is closer to the rod 2 than the remaining portion. In the fixing member 9, an uneven surface portion 92 is formed at least on the surface portion facing the rod 2 in the portion disposed in the second hole portion 39. In the example of FIGS. 13 and 14, the shape of the unevenness in the uneven surface portion 92 is substantially triangular.

The portion of the fixing member 9 that is disposed in the second hole 39 is bent so as to be closer to the rod 2 than the remaining portion, so that the surface portion provided with the uneven surface portion 92 of the remaining portion The back surface portion is in a state of pressing the inner wall portion of the first hole portion 38. Due to the reaction against the pressing, the uneven surface portion 92 is in pressure contact with the male screw portion 21, and the unevenness of the uneven surface portion 92 and the screw thread of the male screw portion 21 are engaged. In this way, the main part of the turbo actuator 103 is configured.

Next, with reference to FIGS. 15 to 17, an assembling method of the main part of the turbo actuator 103 will be described focusing on a bending method of the fixing member 9. FIG.

FIG. 15 shows a state before the fixing member 9 is bent. As shown in FIG. 15, the distal end portion of the rod 2 is inserted into the rod insertion portion 31, and the male screw portion 21 and the female screw portion 33 are screwed together. In the state shown in FIG. 15, the joint position is adjusted to a position according to automobile exhaust gas regulations at the destination of the automobile on which the turbo actuator 103 is mounted.

Further, as shown in FIG. 15, the fixing member 9 is inserted into the first hole 38. At this time, substantially the entire fixing member 9 is accommodated in the first hole 38. Further, the protrusion 91 provided on the fixing member 9 abuts against the inner wall portion of the first hole portion 38, thereby preventing the fixing member 9 from dropping from the first hole portion 38. For example, a dedicated tool C is used to bend the fixing member 9.

FIG. 16 shows a state where the fixing member 9 is being bent. As shown in FIG. 16, the dedicated tool C is passed through the second hole 39 to press the fixing member 9 toward the rod 2. The fixing member 9 is preferably made of a material soft enough to be plastically deformed by pressing with the dedicated tool C.

FIG. 17 shows a state where the bending of the fixing member 9 is completed. As a result of pressing by the dedicated tool C, the fixing member 9 is bent so that the portion disposed in the second hole 39 is closer to the rod 2 than the remaining portion, as shown in FIG. In this state, the unevenness of the uneven surface portion 92 is engaged with the screw thread of the male screw portion 21.

In this way, the bending of the fixing member 9 is completed. Note that a pressing machine (not shown) may be used for pressing the fixing member 9 instead of the dedicated tool C.

In the turbo actuator 103 according to the fourth embodiment, substantially the entire fixing member 9 is accommodated in the first hole 38, and the portion disposed in the second hole 39 of the fixing member 9 is the remaining portion. Since it is bent so as to be closer to the rod 2 than the part, it is difficult to remove the fixing member 9. Therefore, it is possible to obtain the turbo actuator 103 in which it is difficult to readjust the joint position. Further, if the joint position is forcibly readjusted without removing the fixing member 9, at least one of the screw thread of the male screw portion 21 and the unevenness of the uneven surface portion 92 is damaged. Therefore, the readjustment trace can be clearly left on the rod 2 or the fixing member 9.

In addition, the shape of the unevenness in the uneven surface portion 92 is not limited to a substantially triangular wave shape as long as it engages with the screw thread of the male screw portion 21. The shape of the unevenness may be, for example, a substantially saw blade shape. Alternatively, the shape of the unevenness may be the same shape as the unevenness in the fixing member 7 of the second embodiment.

Further, the shape of the fixing member 9 may be a substantially plate shape as shown in FIGS. 13 and 14, and is not limited to a strict plate shape. The meaning of the term “plate shape” described in the claims of the present application is not limited to a strict plate shape, but also includes a substantially plate shape. Similarly, the meaning of the term “triangular wave” described in the claims of the present application is not limited to a strict triangular wave shape, but includes a substantially triangular wave shape.

In addition, the turbo actuator 103 according to the fourth embodiment can employ various modifications similar to those described in the first embodiment.

As described above, the turbo actuator 103 according to the fourth embodiment includes the rod 2 that is linearly movable along the axial direction by the actuator body 1 and the bottomed cylindrical rod insertion portion 31 through which the tip of the rod 2 is inserted. And the lever 3 provided at the bottom of the rod insertion portion 31 and the hole 38 provided in the side wall of the rod insertion portion 31 and the outer peripheral portion of the tip portion. The male screw portion 21 provided on the outer peripheral portion of the tip end portion and the female screw portion 33 provided on the inner peripheral portion of the rod insertion portion 31 are screwed together. The fixing member 9 is in pressure contact with the male screw portion 21. This makes it difficult to readjust the joint position.

The

holes

38 and 39 include a slot-shaped first hole 38 extending in the axial direction of the rod 2 and a second hole 39 communicating with the first hole 38 and penetrating the side wall of the rod insertion part 31. Of the plate-like fixing member 9 inserted into the first hole portion 38, a portion disposed in the second hole portion 39 is in pressure contact with the male screw portion 21. Thereby, the turbo actuator 103 having the structure illustrated in FIGS. 13 and 14 can be obtained.

Further, the fixing member 9 has an uneven surface portion 92 at a portion disposed in the second hole portion 39, and the unevenness of the uneven surface portion 92 and the screw thread of the male screw portion 21 are engaged with each other. Thereby, even if the joint position is readjusted, a trace of readjustment can be clearly left on the rod 2 or the fixing member 9.

Further, the fixing member 9 has a convex portion 91 for preventing the first member 38 from dropping out. As a result, after the fixing member 9 is inserted into the first hole 38, the fixing member 9 is dropped from the first hole 38 in a work process before the fixing member 9 is bent by the dedicated tool C or a press machine. Can be prevented.

In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

The turbo actuator of the present invention can be used for opening control of a waste gate valve.

1 actuator body, 2 rod, 3 joint, 4 pin, 5 lever, 6 fixing member, 7 fixing member, 8 fixing member, 9 fixing member, 21 male screw part, 30 hollow part, 31 rod insertion part, 32 lever mounting part , 33 female screw part, 34 through hole, 35 hole part, 36 first hole part, 37 second hole part, 38 first hole part, 39 second hole part, 81 first leg part, 82 second leg part, 83 connection part, 91 convex part, 92 uneven surface part, 100 turbo actuator, 101 turbo actuator, 102 turbo actuator, 103 turbo actuator.

Claims

A rod that can move straight along the axial direction by the actuator body;
A joint having a bottomed cylindrical rod insertion part through which the tip of the rod is inserted, and a lever mounting part provided at the bottom of the rod insertion part;
A fixing member that is inserted into a hole provided in a side wall portion of the rod insertion portion, and that is in pressure contact with an outer peripheral portion of the tip portion,
A male screw portion provided on the outer peripheral portion of the tip portion and a female screw portion provided on the inner peripheral portion of the rod insertion portion are screwed together, and the fixing member is in pressure contact with the male screw portion. A turbo actuator characterized by that.
2. The turbo actuator according to claim 1, wherein the male screw part is crushed at a part where the fixing member is pressed.
3. The turbo actuator according to claim 2, wherein the fixing member has a disk shape, and one surface portion of the fixing member is in pressure contact with the male screw portion.
The turbo actuator according to claim 1, wherein the fixing member has an uneven surface portion, and the unevenness of the uneven surface portion and the screw thread of the male screw portion are engaged with each other.
5. The turbo actuator according to claim 4, wherein the irregularities in the irregular surface portion are arranged along a plurality of non-parallel directions.
The turbo actuator according to claim 5, wherein each convex portion in the concave and convex surface portion has a quadrangular pyramid shape.
The turbo actuator according to claim 4, wherein the fixing member has a disk shape, and the uneven surface portions are formed on both surface portions of the fixing member.
2. The turbo actuator according to claim 1, wherein the fixing member is U-shaped, and each of the opposing face portions of the two leg portions of the fixing member is in pressure contact with the male screw portion. .
The hole has a slot-shaped first hole along the axial direction of the rod, and a second hole that communicates with the first hole and penetrates the side wall of the rod insertion part.
2. The turbo actuator according to claim 1, wherein a portion of the plate-like fixing member inserted into the first hole is disposed in the second hole and is in pressure contact with the male screw. .
The said fixing member has an uneven surface part in the site | part arrange | positioned in the said 2nd hole part, The unevenness | corrugation of the said uneven surface part and the screw thread of the said male screw part have meshed | engaged. Turbo actuator.
11. The turbo actuator according to claim 10, wherein the unevenness in the uneven surface portion is a triangular wave shape.
10. The turbo actuator according to claim 9, wherein the fixing member has a protrusion for preventing the first hole from falling off.