Wastegate valve device and turbocharger

Abstract

This wastegate valve device comprises: a valve body; a lever shaft which is joined to the valve body at one end side; a lever plate which is provided to the lever shaft at the other end side; a lever pin which protrudes from the lever plate along the plate thickness direction of the lever plate; a rod which includes, at one end side, a plate-shaped joint part that has formed therein an insertion hole for insertion of the lever pin; an actuator which is for causing the rod to reciprocate; and an R-pin which is attached to the lever pin and which is positioned on the opposite side from the lever plate in the plate thickness direction, with the joint part therebetween. The R-pin includes: an insertion part that is inserted into an extending hole which extends in the lever pin along a direction orthogonal to the plate thickness direction, and that extends in a straight line; an engagement part that engages with the outer circumference of the lever pin, and that extends in a wave shape along the direction of extension of the insertion part; a folded-back part that connects one end of the insertion part on one side in the extension direction and one end of the engagement part on one side in the extension direction; and an extending part that extends toward the joint part from the other end of the engagement part on the other side in the extension direction, and that has a tip end which contacts one end surface of the joint part on the opposite side from the lever plate side.

Description

Technical Field

[0005] ,

[0001] The present disclosure relates to a wastegate valve device and a turbocharger including the wastegate valve device.

Background Art

[0002] Conventionally, for the purpose of improving the output of an engine (internal combustion engine), etc., a turbocharger including a turbine that rotates by the exhaust gas of the engine and a compressor that compresses the air supplied to the engine using the torque of the turbine is known. And, the turbocharger may be provided with a wastegate valve device for preventing damage to the engine or deterioration of engine performance due to an increase in the pressure (boost pressure) in the intake passage of the engine above a specified value.

[0003] The wastegate valve device is provided in a bypass line through which at least a part of the exhaust gas of the engine bypasses the turbine. The wastegate valve device controls so that the above-described boost pressure becomes appropriate by causing a part of the exhaust gas to flow into the bypass line and adjusting the amount of exhaust gas flowing into the turbine. Such a wastegate valve device drives an actuator (for example, an electric actuator) based on the pressure in the intake passage of the engine and performs an opening / closing operation (opening / closing amount adjustment) of the valve body.

[0004] The wastegate valve device includes a plurality of link components that are linked to each other so as to be able to transmit the drive of the actuator to the valve body. Specifically, the plurality of link components include a lever shaft whose one end side is connected to the valve body, a lever plate provided on the other end side of the lever shaft, a lever pin protruding along the plate thickness direction of the lever plate from the lever plate, and a rod that reciprocates by an actuator and includes a plate-shaped joint portion having an insertion hole through which the lever pin is inserted at one end side. [[ID=​​Incidentally, if exhaust gas pulsation occurs from the engine side, or vibrations occur from the actuator side, one of the multiple link components such as the rod will vibrate. When one of the multiple link components vibrates, a chattering sound (sound caused by multiple link components contacting each other) may be generated from the wastegate valve device, potentially leading to a decrease in the quietness of the wastegate valve. In addition, there is a risk of wear occurring due to the multiple link components contacting each other.

[0006] To address such concerns, for example, Patent Document 1 discloses providing a biasing member inside the insertion hole to bias the lever pin toward the joint portion of the rod or toward the center of the insertion hole, in order to prevent the joint portion of the rod and the lever pin from coming into contact with each other. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2018-071550 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, the technology described in Patent Document 1 does not take into account the noise and wear caused by the rod joint and lever plate colliding with each other.

[0009] This disclosure has been made in view of the above-mentioned problems and aims to provide a wastegate valve device that can suppress the generation of noise and wear caused by collisions between the rod joint and the lever plate. [Means for solving the problem]

[0010] To achieve the above objective, the wastegate valve device according to the present disclosure includes a valve body, a lever shaft connected to the valve body at one end, a lever plate provided at the other end of the lever shaft, a lever pin protruding from the lever plate along the thickness direction of the lever plate, a rod including a plate-shaped joint portion at one end through which the lever pin is inserted, an actuator for reciprocating the rod, and a beta pin attached to the lever pin, the beta pin located on the opposite side of the lever plate from the joint portion in the thickness direction. The beta pin comprises an insertion portion through which the lever pin is inserted in an extending hole extending in a direction perpendicular to the plate thickness direction, the insertion portion being linearly extending; a locking portion that engages with the outer circumference of the lever pin, the locking portion being wavy along the extending direction of the insertion portion; a folded portion connecting one end of the insertion portion in the extending direction to one end of the locking portion in the extending direction; and an extending portion extending toward the joint portion with the other end of the locking portion in the extending direction as a starting point, the tip of which contacts one end face of the joint portion opposite to the lever plate side. [Effects of the Invention]

[0011] According to the wastegate valve device of this disclosure, it is possible to suppress noise generation and wear caused by collisions between the rod joint and the lever plate. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic perspective view showing the configuration of a turbocharger equipped with a wastegate valve device according to several embodiments. [Figure 2] This diagram schematically shows the configuration of a wastegate valve device according to the first embodiment. [Figure 3] This diagram schematically shows the configuration of the beta pin according to the first embodiment. [Figure 4]Figure 3 shows the beta pin attached to the lever pin. [Figure 5] Figure 3 shows the beta pin attached to the lever pin. [Figure 6] This diagram schematically shows the configuration of the beta pin according to several embodiments. [Figure 7] This is a magnified view of the tip of an extended portion according to several embodiments. [Figure 8] This diagram schematically shows the configuration of the beta pin according to the second embodiment. [Figure 9] This figure shows the beta pin attached to the lever pin, as shown in Figure 8. [Figure 10] This figure shows the beta pin attached to the lever pin according to the first modified example of the second embodiment. [Figure 11] This figure shows the beta pin attached to the lever pin according to a second modified example of the second embodiment. [Figure 12] This figure shows the beta pin according to the third embodiment attached to the lever pin. [Figure 13] This figure shows the beta pin according to the fourth embodiment attached to the lever pin. [Modes for carrying out the invention]

[0013] Hereinafter, a wastegate valve device and a turbocharger according to embodiments of the present disclosure will be described with reference to the drawings. Such embodiments represent one aspect of the present disclosure and are not limiting, and can be modified at will within the scope of the technical idea of ​​the present disclosure.

[0014] FIG. 1 is a diagram schematically showing the configuration of a turbocharger 100 including a wastegate valve device 1 according to some embodiments. As illustrated in FIG. 1, the turbocharger 100 includes a turbine wheel 102, a compressor wheel 104, a rotating shaft 106 connecting the turbine wheel 102 and the compressor wheel 104, and a wastegate valve device 1.

[0015] The turbine wheel 102 is provided in an exhaust gas line 202 through which the exhaust gas G discharged from the engine 200 flows. The compressor wheel 104 is provided in an intake line 204 through which the combustion air A supplied to the engine 200 flows. The rotating shaft 106 has a longitudinal direction, one end portion in the longitudinal direction is mechanically connected to the turbine wheel 102, and the other end portion in the longitudinal direction is mechanically connected to the compressor wheel 104. Therefore, the power of the turbine wheel 102 rotationally driven by the exhaust gas G is transmitted to the compressor wheel 104 via the rotating shaft 106, and the combustion air A flowing through the intake line 204 is compressed.

[0016] The exhaust gas line 202 includes a bypass line 210 for sending a part of the exhaust gas G from the upstream side to the downstream side of the turbine wheel 102 without passing through the turbine wheel 102. In the form illustrated in FIG. 1, the exhaust gas line 202 includes an upstream exhaust gas line 206 connecting the engine 200 and the turbine wheel 102, a downstream exhaust gas line 208 through which the exhaust gas G that has passed through the turbine wheel 102 flows, and a bypass line 210 connecting the upstream exhaust gas line 206 and the downstream exhaust gas line 208.

[0017] The wastegate valve device 1 is installed in the bypass line 210 and is configured to open and close the bypass line 210. The wastegate valve device 1 reduces the amount of exhaust gas G and thermal energy sent to the turbine wheel 102 by diverting a portion of the exhaust gas G flowing in the upstream exhaust gas line 206 toward the turbine wheel 102 to the bypass line 210. In other words, the wastegate valve device 1 can reduce the boost pressure of the combustion air A. The wastegate valve device 1 will be described in detail below.

[0018] <First Embodiment> (composition) Figure 2 is a schematic diagram showing the configuration of a wastegate valve device 1 according to the first embodiment. As illustrated in Figure 2, the wastegate valve device 1 includes a valve body 2, a lever shaft 4, a lever plate 6, a lever pin 8, a rod 10, an actuator 12, and a beta pin 14.

[0019] The valve body 2 is located within the bypass line 210. The lever shaft 4 has a rod shape, and one end (the lower end in the plane of Figure 2) is connected to the valve body 2.

[0020] The lever plate 6 has a flat shape and is provided on the other end of the lever shaft 4 (the upper side in the plane of Figure 2). In the following, one side of the lever plate 6 that is on the valve body 2 side in the thickness direction (hereinafter referred to as the thickness direction D1) will be considered downwards, and the other side that is opposite to the valve body 2 side in the thickness direction D1 will be considered upwards.

[0021] The lever pin 8 has a cylindrical shape and protrudes upward from the upper surface 6a of the lever plate 6 along the thickness direction D1. The lever pin 8 may be integrally formed with the lever plate 6, or it may be fixed to the lever plate 6 by a fastening part such as a bolt. The lever pin 8 has an extending hole 3 formed therein that extends along a direction perpendicular to the thickness direction D1 (horizontal direction). In the embodiment illustrated in Figure 2, the extending hole 3 extends along a direction (intersecting direction D3) that intersects the direction in which the rod 10 extends (extending direction D2) within the horizontal direction.

[0022] The rod 10 includes a plate-shaped joint portion 7 at one end, through which an insertion hole 5 is formed, through which the lever pin 8 is inserted. In the embodiment illustrated in Figure 2, the rod 10 extends linearly from the actuator 12 toward the lever pin 8, connecting the lever pin 8 and the actuator 12. The rod 10 is not limited to a linear shape; it may be curved or bent. Hereafter, the direction in which the rod 10 extends from the actuator 12 toward the lever pin 8 will be referred to as one of the extending directions D2, and the direction opposite to this one will be referred to as the other extending direction D2.

[0023] The actuator 12 causes the rod 10 to reciprocate along the extending direction D2. The actuator 12 causes the rod 10 to reciprocate along the extending direction D2 in accordance with the pressure of the combustion air A supplied to the engine 200, for example. Such an actuator 12 may be an electric actuator driven by an electric motor, or it may be a positive pressure actuator.

[0024] The wastegate valve device 1, which includes the configuration described above, transmits the reciprocating motion of the rod 10 to the lever pin 8, lever plate 6, lever shaft 4, and valve body 2 in that order. The wastegate valve device 1 is configured to open and close the valve body 2 in conjunction with the reciprocating motion of the rod 10.

[0025] The beta pin 14 is attached to the lever pin 8. The beta pin 14 is located on the opposite side of the lever plate 6 from the joint portion 7 of the rod 10 in the plate thickness direction D1. In other words, the beta pin 14 is located above the joint portion 7 of the rod 10. By interfering with the joint portion 7, the beta pin 14 prevents the rod 10 from coming out of the lever pin 8. The specific configuration of the beta pin 14 will be explained with reference to Figure 3.

[0026] Figure 3 is a schematic diagram showing the configuration of the beta pin 14 according to the first embodiment. Figure 4 shows the beta pin 14 shown in Figure 3 attached to the lever pin 8, with the lever pin 8 viewed from above in the plate thickness direction D1. Figure 5 shows the beta pin 14 shown in Figure 3 attached to the lever pin 8, with the beta pin 14 viewed from one side in the extension direction D2.

[0027] As shown in Figure 3, the beta pin 14 includes an insertion portion 16, a locking portion 18, a folded portion 20, and an extended portion 22. The beta pin 14 is made of a flexible metal such as stainless steel.

[0028] The insertion portion 16 extends in a straight line. As illustrated in Figure 4, the insertion portion 16 is inserted into the extending hole 3 formed in the lever pin 8. The insertion portion 16 penetrates the lever pin 8. The locking portion 18 locks onto the outer circumference 24 of the lever pin 8. The locking portion 18 extends in a wavy shape along the extending direction of the insertion portion 16 (hereinafter referred to as the intersecting direction D3). The locking portion 18 has an arc in the middle and is gently bent multiple times. The locking portion 18 is in contact with one side of the outer circumference 24 of the lever pin 8 in the extending direction D2. The folded portion 20 connects one end 16a of the insertion portion 16 in the intersecting direction D3 and one end 18a of the locking portion 18 in the intersecting direction D3. Therefore, the beta pin 14 is fixed to the lever pin 8 by the restoring force of the beta pin 14, which causes the insertion portion 16 and the locking portion 18 to grip the lever pin 8.

[0029] The extended portion 22 extends toward the joint portion 7, with the other end 18b on the other side of the intersecting direction D3 of the locking portion 18 as the starting point. As shown in Figure 5, the tip 23 of the extended portion 22 contacts the upper surface 7a, which is one end face of the joint portion 7 opposite to the lever plate 6 side.

[0030] In the first embodiment, as illustrated in Figure 4, the locking portion 18 and the extending portion 22 are located on the opposite side of the insertion portion 16 from one end of the rod 10. Specifically, the locking portion 18 and the extending portion 22 are located on one side (towards the actuator 12) of the insertion portion 16 in the extending direction D2.

[0031] (Effects / Actions) The operation and effects of the wastegate valve device 1 according to the first embodiment will now be described. According to the first embodiment, in addition to the conventional anti-loosening function, the beta pin 14 can have a pressing function for pressing the joint portion 7 of the rod 10 against the lever plate 6 by including the extended portion 22. This pressing function eliminates the gap (play) between the joint portion 7 of the rod 10 and the lever plate 6, and suppresses the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1. As a result, the generation of noise and wear caused by the joint portion 7 of the rod 10 and the lever plate 6 colliding with each other can be suppressed. Furthermore, since it is only necessary to include the extended portion 22 in the beta pin that is conventionally provided in the wastegate valve device, rather than adding a member such as a leaf spring to the wastegate valve device 1, an increase in cost can be suppressed. Furthermore, the beta pin 14 has a pressing function, which suppresses contact between the lever pin 8 inserted into the insertion hole 5 of the joint portion 7 and the inner surface of the insertion hole 5, thereby suppressing noise generation and wear caused by collisions between the joint portion 7 and the lever pin 8.

[0032] When the joint portion 7 vibrates along the plate thickness direction D1, the gap formed between the joint portion 7 and the lever plate 6 may increase as it moves from the lever pin 8 toward one side of the extension direction D2 (actuator side). According to the first embodiment, the tip 23 of the extension portion 22 presses the joint portion 7 of the rod 10 against the lever plate 6 from one side of the extension direction D2 than the lever pin 8, so the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1 can be further suppressed. In the first embodiment, the tip 23 of the extension portion 22 was located on one side of the extension direction D2 than the lever pin 8, but the present disclosure is not limited to this form. In some embodiments, although not shown, the extension portion 22 is located on the other side of the extension direction D2 than the insertion portion 16. In some embodiments, the extension portion 22 is located on one or the other side of the intersecting direction D3 (width direction of the lever plate 6) than the lever pin 8. In this case, the extension hole 3 of the lever pin 8 extends along the extension direction D2.

[0033] Figure 6 is a schematic diagram showing the configuration of the beta pin 14 according to several embodiments. In the embodiment illustrated in Figure 6, the extended portion 22 includes a twisted portion 29 in which at least a part is twisted in an annular shape. The twisted portion 29 is located on the opposite side of the tip 23 of the extended portion 22 in the direction in which the extended portion 22 extends. With this configuration, the load on which the beta pin 14 presses the joint portion 7 of the rod 10 against the lever plate 6 can be increased, and the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1 can be further suppressed.

[0034] Figure 7 is an enlarged view of the tip 23 of the extension portion 22 according to several embodiments. In the embodiment illustrated in Figure 7, the extension portion 22 includes a contact surface 27 formed by cutting out the lower side of the tip surface 25 located furthest from the other end 18b of the locking portion 18. With this configuration, the area in contact between the tip 23 of the extension portion 22 and the upper surface 7a of the joint portion 7 can be increased.

[0035] <Second Embodiment> A wastegate valve device 1 according to a second embodiment of this disclosure will now be described. The second embodiment differs from the first embodiment in that the beta pin 14 further includes a line contact portion 30. In the second embodiment, components that are the same as those of the first embodiment are denoted by the same reference numerals, and their detailed description is omitted.

[0036] Figure 8 is a schematic diagram showing the configuration of the beta pin 14 according to the second embodiment. Figure 9 is a diagram showing the beta pin 14 shown in Figure 8 attached to the lever pin 8. As illustrated in Figure 8, the beta pin 14 further includes a line contact portion 30 that extends linearly from the tip 23 of the extended portion 22. This line contact portion 30 is in contact with the upper surface 7a of the joint portion 7. In the second embodiment, as illustrated in Figure 9, the line contact portion 30 extends from the tip 23 of the extended portion 22 along the other side in the extending direction D2.

[0037] According to the second embodiment, the beta pin 14 applies a load that presses the joint portion 7 of the rod 10 against the lever plate 6, and this load is widely applied to the upper surface 7a of the joint portion 7, further suppressing the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1.

[0038] However, in the first embodiment, only the tip 23 of the extended portion 22 is in contact with the upper surface 7a of the joint portion 7, resulting in a small contact area. This may cause at least one of the tip 23 of the extended portion 22 and the upper surface 7a of the joint portion 7 to wear down due to the load of the beta pin 14. In contrast, according to the second embodiment, the contact area can be increased, thereby suppressing wear on either the tip 23 of the extended portion 22 or the upper surface 7a of the joint portion 7 due to the load of the beta pin 14.

[0039] In the second embodiment, the line contact portion 30 extends from the tip 23 of the extension portion 22 along the other side of the extension direction D2 so as to be advantageous in suppressing vibration when the lever plate 6 or joint portion 7 vibrates significantly near the lever pin 8, but the disclosure is not limited to this embodiment. The direction in which the line contact portion 30 extends may be determined in response to the vibration of the lever plate 6 or joint portion 7.

[0040] Figure 10 shows the beta pin 14 according to the first modification of the second embodiment attached to the lever pin 8. Figure 11 shows the beta pin 14 according to the second modification of the second embodiment attached to the lever pin 8. In the embodiment illustrated in Figure 10, the line contact portion 30 extends from the tip 23 of the extension portion 22 along one side in the extension direction D2. According to the configuration in Figure 10, the beta pin 14 presses the joint portion 7 against the lever plate 6 for a long distance in the extension direction D2. This is advantageous, for example, when the entire lever plate 6 vibrates with parallel displacements in the same phase and with the same displacement. In the embodiment illustrated in Figure 11, the beta pin 14 extends from the tip 23 of the extension portion 22 along the other side in the intersecting direction D3. According to the configuration illustrated in Figure 11, the beta pin 14 can press the joint portion 7 against the lever plate 6 in a balanced manner in the intersecting direction D3. In addition, the load on the joint portion 7 that the beta pin 14 applies to the lever plate 6 can be increased.

[0041] <Third Embodiment> A wastegate valve device 1 according to a third embodiment of this disclosure will now be described. The third embodiment differs from the second embodiment in that the line contact portion 30 further includes an opposing portion 40 and an extended connecting portion 42. In the third embodiment, components identical to those of the second embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0042] Figure 12 shows the beta pin 14 according to the third embodiment attached to the lever pin 8. In the third embodiment, as illustrated in Figure 12, the line contact portion 30 includes an opposing portion 40 located on the opposite side of the extension portion 22 in the extension direction D2, with the lever pin 8 in between, and an extension connecting portion 42 that connects the opposing portion 40 and the extension portion 22.

[0043] In the embodiment illustrated in Figure 12, the opposing portion 40 extends along the intersecting direction D3 while in contact with the upper surface 7a of the joint portion 7. One end 40a of the opposing portion 40 on one side of the intersecting direction D3 is located to one side of the intersecting direction D3 than the lever pin 8. The other end 40b of the opposing portion 40 on the other side of the intersecting direction D3 is located to the other side of the intersecting direction D3 than the lever pin 8. The extended connecting portion 42 connects one end 40a of the opposing portion 40 to the tip 23 of the extended portion 22. The extended connecting portion 42 is in contact with the upper surface 7a of the joint portion 7.

[0044] According to the third embodiment, the beta pin 14 presses the joint portion 7 of the rod 10 against the lever plate 6 from both sides of the lever pin 8, centered on the lever pin 8, in the extending direction D2, thereby enhancing the effect of suppressing the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1.

[0045] <Fourth Embodiment> A wastegate valve device 1 according to a fourth embodiment of this disclosure will now be described. The fourth embodiment differs from the first embodiment in that the beta pin 14 further includes a second insertion portion 50, a second locking portion 52, a second folded portion 54, a second extended portion 56, and a connecting portion 58. In the fourth embodiment, components identical to those of the first embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0046] Figure 13 shows the beta pin 14 according to the fourth embodiment attached to the lever pin 8. In the fourth embodiment, as illustrated in Figure 13, the beta pin 14 further includes a second insertion portion 50, a second locking portion 52, a second folded portion 54, a second extended portion 56, and a connecting portion 58.

[0047] The second insertion portion 50 extends in a straight line. As illustrated in Figure 13, the second insertion portion 50 is inserted into the extension hole 3 formed in the lever pin 8. The second insertion portion 50 is inserted into the common extension hole 3 together with the insertion portion 16 and passes through the lever pin 8. The second locking portion 52 is located on the opposite side of the lever pin 8 from the locking portion 18 and locks onto the outer circumference 24 of the lever pin 8. The second locking portion 52 extends in a wavy shape along the extension direction of the second insertion portion 50. In the fourth embodiment, the extension direction of the second insertion portion 50 is the same direction (intersecting direction D3) as the extension direction of the insertion portion 16. The second locking portion 52 has an arc in the middle and is gently bent multiple times. The second locking portion 52 is in contact with the other side of the outer circumference 24 of the lever pin 8 in the extension direction D2.

[0048] The second folded portion 54 connects one end 50a of the second insertion portion 50 in the intersecting direction D3 to one end 52a of the second locking portion 52 in the intersecting direction D3. The second extended portion 56 extends toward the joint portion 7, starting from the other end 52b of the second locking portion 52 in the other intersecting direction D3. The tip 57 of the second extended portion 56 contacts the upper surface 7a of the joint portion 7. The connecting portion 58 connects the other end 50b of the second insertion portion 50 in the intersecting direction D3 to the other end 16b of the insertion portion 16 in the intersecting direction D3.

[0049] According to the fourth embodiment, the beta pin 14 presses the joint portion 7 of the rod 10 against the lever plate 6 from both sides of the lever pin 8, thereby enhancing the effect of suppressing the vibration of the joint portion 7 of the rod 10 in the plate thickness direction D1.

[0050] The contents described in each of the above embodiments can be understood, for example, as follows:

[0051] [1] The wastegate valve device (1) relating to this disclosure is Valve body (2), The lever shaft (4) is connected to the valve body at one end, A lever plate (6) provided on the other end of the lever shaft, A lever pin (8) protrudes from the lever plate along the thickness direction (D1) of the lever plate, A rod (10) including a plate-shaped joint portion at one end, through which the lever pin is inserted (5), An actuator (12) for causing the rod to reciprocate, A beta pin (14) attached to the lever pin, the beta pin (14) located on the opposite side of the lever plate from the joint portion in the plate thickness direction, The aforementioned beta pin is, The lever pin is inserted into an extending hole (3) that extends along a direction (D3) perpendicular to the plate thickness direction, and comprises a linearly extending insertion portion (16), A locking portion that engages with the outer circumference (24) of the lever pin, comprising a locking portion (18) that extends in a wavy manner along the extending direction of the insertion portion, A folded portion (20) connects one end (16a) of the insertion portion in the extending direction and one end (18a) of the locking portion in the extending direction, The extension portion includes an extension portion (22) that extends toward the joint portion with the other end (18b) of the locking portion on the other side in the extending direction as a base point, the tip (23) of which contacts one end face (7a) of the joint portion opposite to the lever plate side.

[0052] According to the configuration described in [1] above, the beta pin, by including an extended portion, can have a pressing function to press the rod joint against the lever plate, in addition to the conventional anti-dislodgement function to prevent the rod joint from coming out of the lever pin. This pressing function eliminates the gap (play) between the rod joint and the lever plate, suppressing vibration of the rod joint in the thickness direction. As a result, it is possible to suppress the generation of noise and wear caused by the rod joint and the lever plate colliding with each other. Furthermore, since it is only necessary to include an extended portion in the beta pin that is conventionally provided in the wastegate valve device, rather than adding a member such as a leaf spring to the wastegate valve device, the increase in cost can be suppressed.

[0053] Furthermore, according to the configuration described in [1] above, the beta pin has a pressing function, which suppresses contact between the lever pin inserted into the insertion hole of the joint and the inner surface of the insertion hole, and also suppresses noise generation and wear caused by collisions between the joint and the lever pin.

[0054] [2] In some embodiments, in the configuration described in [1] above, The locking portion and the extending portion are located on the opposite side of the rod from the insertion portion.

[0055] When the joint vibrates along the thickness direction of the plate, the gap formed between the joint and the lever plate may increase as you move from the lever pin toward the other end of the rod (actuator side). According to the configuration described in [2] above, the beta pin presses the joint of the rod against the lever plate from the other end of the rod than the lever pin, so the vibration of the joint of the rod in the thickness direction can be further suppressed.

[0056] [3] In some embodiments, in the configuration described in [1] or [2] above, The extended portion includes a twisted portion (29) in which at least a part is twisted in an annular shape.

[0057] According to the configuration described in [3] above, the load on the beta pin that presses the joint portion of the rod against the lever plate can be increased, further suppressing the vibration of the joint portion of the rod in the thickness direction.

[0058] [4] In some embodiments, in the configuration described in any one of [1] to [3] above, The aforementioned beta pin is, The present invention further includes a linear contact portion (30) that extends from the tip of the extended portion while in contact with the one end face of the joint portion.

[0059] According to the configuration described in [4] above, the load applied by the beta pin to press the joint portion of the rod against the lever plate is widely applied to one end face of the joint portion, further suppressing the vibration of the joint portion of the rod in the thickness direction. In addition, wear of at least one of the beta pin and the joint portion of the rod due to this load can be suppressed.

[0060] [5] In some embodiments, in the configuration described in [4] above, The aforementioned line contact portion is A counter portion (40) located on the opposite side of the extended portion, with the lever pin in between, It includes an extending connecting portion (42) that connects the opposing portion and the extending portion.

[0061] According to the configuration described in [5] above, the beta pin presses the joint portion of the rod against the lever plate from both sides of the lever pin, thereby enhancing the effect of suppressing vibration in the thickness direction of the joint portion of the rod.

[0062] [6] In some embodiments, in the configuration described in any one of [1] to [5] above, The aforementioned beta pin is, A second insertion portion inserted into the aforementioned extending hole, comprising a second insertion portion (50) that extends in a straight line, A second locking portion is located on the opposite side of the lever pin from the locking portion and locks onto the outer circumference of the lever pin, and comprises a second locking portion (52) that extends in a wavy manner along the second extending direction of the second insertion portion, A second folded portion (54) connects one end (50a) of the second insertion portion in the second extending direction and one end (52a) of the second locking portion in the second extending direction, A second extending portion extending toward the joint portion, with the other end (52b) of the second locking portion in the other extending direction as a base point, the second extending portion (56) having a tip (57) that contacts the one end face of the joint portion, The present invention further includes a connecting portion (58) that connects the other end (50b) of the second insertion portion in the other direction of the second extending direction to the other end (16b) of the insertion portion in the other direction of the extending direction.

[0063] According to the configuration described in [6] above, the beta pin presses the joint portion of the rod against the lever plate from both sides of the lever pin, thereby enhancing the effect of suppressing vibration in the thickness direction of the joint portion of the rod.

[0064] [7] The turbocharger (100) relating to this disclosure comprises a wastegate valve device as described in any one of [1] to [6] above.

[0065] According to the configuration described in [7] above, a turbocharger can be provided that can suppress noise generation and wear caused by collisions between the rod joint and the lever plate. [Explanation of Symbols]

[0066] 1. Wastegate valve device 2 Valve body 3 Extension hole 4 Lever shaft 5 Through hole 6 Lever plate 6a Top surface of lever plate 7. Joint section 7a Top surface of the joint 8 Lever pins 10 rods 12 Actuators 14 beta pins 16 Insertion part 16a One end of the insertion part 18 Locking part 18a One end of the locking part 18b Other end of the locking part 20 Folded section 22 Extension 23 Tip of the extended portion 24 Outer circumference of the lever pin 25 Tip surface 27 Contact surface 29 Twisted section 30 Line contact area 40 Opposing section 42 Extension connection 50 Second insertion section 52 Second locking part 54 Second turning section 56 Second extension 57 Tip of the second extension 58 Connection part 100 Turbocharger 102 Turbine Wheel 104 Compressor Wheel 106 Rotating Shaft 200 engine 202 Exhaust gas line 204 Intake line 206 Upstream exhaust gas line 208 Downstream exhaust gas line 210 Bypass Line A Combustion air D1 Thickness direction D2 Extending direction D3 Board width direction G exhaust gas

Claims

1. Valve body and, A lever shaft connected to the valve body at one end, A lever plate provided on the other end of the lever shaft, A lever pin protruding from the lever plate along the thickness direction of the lever plate, A rod including a plate-shaped joint portion at one end, through which the lever pin is inserted, An actuator for causing the rod to reciprocate, A beta pin attached to the lever pin, the beta pin located on the opposite side of the lever plate from the joint portion in the plate thickness direction, The aforementioned beta pin is, An insertion portion through which the lever pin is inserted in an extending hole that extends in a direction perpendicular to the plate thickness direction, comprising a linearly extending insertion portion, A locking portion that engages with the outer circumference of the lever pin, comprising a locking portion that extends in a wavy manner along the extending direction of the insertion portion, A folded portion connecting one end of the insertion portion in the extending direction and one end of the locking portion in the extending direction, An extending portion that extends toward the joint portion, with the other end of the locking portion on the other side in the extending direction as a starting point, and the tip of the extending portion contacts one end face of the joint portion opposite to the lever plate side, Wastegate valve device.

2. The locking portion and the extending portion are located on the opposite side of the rod from the one end side from the insertion portion. The wastegate valve device according to claim 1.

3. The extended portion includes a twisted portion in which at least a part is twisted in an annular shape. The wastegate valve device according to claim 1 or 2.

4. The aforementioned beta pin is, The line contact portion further includes a line contact portion that extends from the tip of the extending portion while in contact with the one end face of the joint portion, The wastegate valve device according to claim 1 or 2.

5. The aforementioned line contact portion is A counterpart located on the opposite side of the extended portion, with the lever pin in between, Includes an extending connecting portion that connects the opposing portion and the extending portion, The wastegate valve device according to claim 4.

6. The aforementioned beta pin is, A second insertion portion inserted into the aforementioned extending hole, comprising a second insertion portion that extends in a straight line, A second locking portion located on the opposite side of the lever pin from the locking portion and locking onto the outer circumference of the lever pin, the second locking portion extending in a wavy manner along the second extending direction of the second insertion portion, A second folded portion connecting one end of the second insertion portion in the second extending direction and one end of the second locking portion in the second extending direction, A second extending portion that extends toward the joint portion with respect to the other end of the second locking portion in the second extending direction, the tip of which of the second extending portion contacts the one end face of the joint portion, The present invention further includes a connecting portion that connects the other end of the second insertion portion in the second extending direction to the other end of the insertion portion in the extending direction, The wastegate valve device according to claim 1 or 2.

7. A turbocharger comprising the wastegate valve device according to claim 1 or 2.

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