Electronic actuator for turbocharger

Abstract

The electronic actuator for the turbocharger comprises a magnet, the side wall of the magnet comprises an arc-shaped part and a straight face part, and the straight face part is an N-level part or an S-level part. The electronic actuator for the turbocharger comprises the magnet, the magnet comprises the arc-shaped part and the straight face part, the side wall of the arc-shaped part is an arc face, the side wall of the straight face part is a straight face, the straight face part and the two ends are used for being connected with the two ends of the arc-shaped part, so that the magnet is of a D-shaped structure, the straight face part is arranged to be of an N-level or S-level, and the corresponding arc-shaped part is of an S-level or N-level. The two structures with large difference, namely the straight face part and the arc-shaped part, can facilitate a worker to distinguish the N pole and the S pole, extra N pole and S pole calibration is not needed after the magnet leaves a factory, the manufacturing process is simplified, meanwhile, the worker can clearly and rapidly distinguish the N pole and the S pole, and the magnet can be rapidly installed at the correct position.

Description

Technical Field

[0001] This application relates to the technical field of electronic actuators, and particularly to an electronic actuator for a turbocharger. Background Art

[0002] In the prior art, in the turbocharger of an automotive engine, an electronic actuator is mostly used to control the turbocharger. The electronic actuator realizes the control target by programming the motor drive program and uses a sensor to feedback the output position of the electronic actuator. Generally, an electronic actuator includes a plastic housing, an aluminum housing, a helical gear assembly, a magnet, and a circuit board. The plastic housing is connected to the aluminum housing to form an installation cavity, and the helical gear assembly, the magnet, and the circuit board are all arranged in the installation cavity. Among them, the magnet is arranged at the end of the output crankshaft of the helical gear assembly, and the circuit board needs to be positioned according to the position of the magnet during installation. The magnet is used to cooperate with the sensor to feedback the position angle.

[0003] However, in the existing electronic actuators, most manufacturers now use injection-molded circular magnets for the helical gear assembly. The circular magnets cannot distinguish between N and S poles during injection molding, and the pole positions are random after injection molding, resulting in the need for product calibration during subsequent assembly and positioning, which greatly reduces the production cycle and efficiency.

[0004] Moreover, the calibration process is a crucial, cumbersome, and time-consuming process in the production of electronic actuators. Before this process is completed, the product cannot be normally driven. After this process is completed, the plastic housing and the aluminum housing must also correspond one by one. If the plastic housing and the aluminum housing are misaligned, the calibration must be performed again.

[0005] Therefore, there is room for further improvement in the existing electronic actuators. Summary of the Utility Model

[0006] In view of this, in view of the technical problem that the magnet in the existing electronic actuator needs to be additionally calibrated after leaving the factory to distinguish between N and S poles, resulting in a cumbersome and time-consuming assembly process for the electronic actuator, this application provides an electronic actuator for a turbocharger, whose magnet does not need to be additionally calibrated after production to distinguish between N and S poles, reduces the calibration process, simplifies the assembly process, and improves the assembly efficiency.

[0007] This application provides an electronic actuator for a turbocharger, including a magnet, wherein the side wall of the magnet includes an arc portion and a straight portion, and the straight portion is N pole or S pole.

[0008] Compared with the prior art, the electronic actuator for a turbocharger of the present application includes a magnet. The magnet includes an arc portion and a straight portion. The side wall of the arc portion is an arc surface, and the side wall of the straight portion is a straight surface. The straight portion is connected to both ends of the arc portion at both ends, so that the magnet forms a D-shaped structure. The straight portion is set as the N pole or the S pole, and the corresponding arc portion is the S pole or the N pole. Therefore, the two structures with large differences between the straight portion and the arc portion can facilitate the staff to distinguish the N pole and the S pole. After the magnet leaves the factory, no additional N pole and S pole calibration is required. While simplifying the manufacturing process, the staff can clearly and quickly distinguish the N pole and the S pole, and can install the magnet in the correct position relatively quickly.

[0009] Preferably, the diameter of the arc portion is D1, and the length of the straight portion is D2, where D1 > D2.

[0010] Preferably, it further includes a helical gear assembly. The helical gear assembly is provided with a mounting post, and one end of the mounting post is connected to the magnet.

[0011] Preferably, a mounting groove is provided at the end of the mounting post. The mounting groove is recessed axially toward the center of the mounting post. The mounting groove is used for mounting the magnet;

[0012] The center line of the mounting groove is on the same straight line as the center line of the mounting post.

[0013] Preferably, the helical gear assembly further includes a limiting ring. The limiting ring is connected to the open end of the mounting groove. The outer side wall of the limiting ring is connected to the inner side wall of the mounting groove. The inner diameter of the limiting ring is smaller than the diameter of the magnet.

[0014] Preferably, the end face of the limiting ring is flush with the end face of the mounting post. The distance between the end face of the limiting ring close to the bottom of the mounting groove and the bottom surface of the mounting groove is greater than or equal to the thickness of the magnet.

[0015] Preferably, the mounting groove includes a straight surface mating portion and an arc surface mating portion. The side wall of the arc surface mating portion faces the side wall of the arc portion, and the side wall of the straight surface mating portion faces the side wall of the straight portion;

[0016] The diameter of the arc surface mating portion is greater than or equal to the diameter of the arc portion;

[0017] The length of the straight surface mating portion is greater than or equal to the length of the straight portion.

[0018] Preferably, at least one positioning groove is provided on the mounting post. The positioning grooves are arranged at equal circumferential intervals along the mounting groove,

[0019] wherein the positioning groove communicates with the mounting groove.

[0020] Preferably, a limit block is provided on one side of the positioning groove close to the mounting groove, the limit block extends axially in a direction away from the center of the mounting column, the bottom of the limit block is connected to the bottom surface of the positioning groove, and the axial length of the limit block is less than the depth of the mounting groove;

[0021] Wherein, the side wall of the limiting block facing the mounting groove is an inclined surface.

[0022] Preferably, the helical gear assembly further comprises sector teeth and an output shaft, wherein the output shaft is connected to the end of the mounting column away from the magnet, and the sector teeth are connected to the side wall of the mounting column.

[0023] The electronic actuator for a turbocharger of the present application has at least the following technical effects:

[0024] 1. By setting a straight surface and an arc-shaped portion on the magnet, the N-grade or S-grade is matched with the straight surface, and then the N-grade or S-grade can be distinguished quickly and clearly, reducing the assembly time, simplifying the assembly procedure, and reducing the probability of assembly errors. In addition, the N-grade and S-grade do not need to be additionally calibrated after the magnet leaves the factory, which reduces the process and overall assembly time;

[0025] 2. By providing a mounting groove on the mounting column, the mounting groove is used to install the magnet, so that the connection between the magnet and the mounting column is more stable and firm; and a limiting ring is provided at the opening of the end surface of the mounting groove, and the inner diameter of the limiting ring is smaller than the diameter of the magnet, so that the limiting ring can limit the magnet in the mounting groove to prevent the magnet from falling out of the opening end of the mounting groove, so that the connection stability between the magnet and the mounting column is better;

[0026] 3. By arranging a straight surface matching portion and a curved surface matching portion on the installation groove, the straight surface matching portion matches with the straight surface portion of the magnet, and the curved surface matching portion matches with the curved portion of the magnet, so that the installation groove structure is adapted to the magnet structure, so as to improve the adaptability of the installation groove to the installation of the magnet;

[0027] 4. By setting a positioning groove on the side of the installation groove, a positioning column can be set in the positioning groove when the installation column is injection molded. The positioning column is used to position the magnet. Then, when the installation column is manufactured, the magnet and the installation column can be connected in one piece, reducing the subsequent process of installing the magnet into the installation column and improving the manufacturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of a helical gear assembly provided in one embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the three-dimensional structure of a magnet provided in one embodiment of the present application;

[0030] Figure 3It is a schematic side view structure diagram of a magnet provided by an embodiment of the present application;

[0031] Figure 4 It is a schematic three-dimensional sectional structure diagram of a helical gear assembly provided by an embodiment of the present application;

[0032] Figure 5 is Figure 4 an enlarged schematic view of the partial A;

[0033] Figure 6 It is a schematic sectional structure diagram of a helical gear assembly provided by an embodiment of the present application.

[0034] Reference numerals:

[0035] 1. Magnet; 11. Straight surface part; 12. Arc part;

[0036] 2. Helical gear assembly; 21. Mounting post; 22. Sector tooth; 23. Output shaft;

[0037] 211. Mounting groove; 212. Limiting ring; 213. Positioning groove; 214. Limiting block;

[0038] 2111. Straight surface mating part; 2112. Arc surface mating part. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0040] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0041] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present application.

[0042] The following further describes the present application in detail with reference to the accompanying drawings. See Figures 1 to 6 description.

[0043] The present application provides an electronic actuator for a turbocharger, which includes a housing and a circuit board, a magnet 1, a motor, a helical gear assembly 2, and a worm installed in the housing. Among them, the circuit board is connected to the motor, the motor is connected to the worm, the worm meshes with the helical gear assembly 2, one end of the helical gear assembly 2 away from the output shaft 23 is connected to the magnet 1, a position detection chip is provided on the circuit board, the motor drives the output shaft 23 to rotate, and the output shaft 23 drives an external connecting rod to act on the nozzle ring or bypass valve of the turbocharger, thereby adjusting the flow characteristics of the turbocharger; and the position detection chip detects the rotation position information according to the rotation of the magnet 1, and converts the position information into a corresponding signal and feeds it back to the engine ECU, so that the electronic actuator can continuously and accurately adjust the bypass valve or nozzle ring of the turbocharger.

[0044] In the application, further expansion is carried out on the helical gear assembly 2 and the magnet 1 of the electronic actuator to reduce the processes in the assembly of the electronic actuator, simplify the assembly procedure, and improve the assembly efficiency of the electronic actuator.

[0045] Specifically, as Figure 2 、 Figure 3 shown, first, the magnet 1 is further improved; in this embodiment, the magnet 1 is a block structure, the upper and lower end faces of the magnet 1 are flat straight faces. Among them, the magnet 1 includes an arc portion 12 and a straight face portion 11. In this embodiment, the side surface of the arc portion 12 is a smooth arc surface, the side surface of the straight face portion 11 is a flat straight face, and both ends of the side wall of the straight face portion 11 are respectively connected corresponding to both ends of the side wall of the arc portion 12. The side wall of the straight face portion 11 and the side wall of the arc portion 12 together form the side wall of the magnet 1. As Figure 3 shown, the arc portion 12 and the straight face portion 11 make the magnet 1 form a D-shaped structure; in this embodiment, the direction of the straight face portion 11 is correspondingly set as the N pole, and the other end corresponding to the straight face portion 11 is the S pole, or the direction of the straight face portion 11 is correspondingly set as the S pole, and the other end corresponding to the straight face portion 11 is the N pole. The relatively significant structural difference between the straight face portion 11 and the arc portion 12 combined with the N pole and S pole can facilitate the staff to quickly and accurately distinguish the N pole and S pole of the magnet 1, and then the magnet 1 does not need to be re-calibrated for the N and S poles after leaving the factory, saving processes and reducing production costs. And when the staff installs the magnet 1, the positions of the N and S poles can be quickly corresponded, improving the assembly efficiency of the magnet 1 in the electronic actuator, thereby further improving the production efficiency of the entire electronic actuator and being beneficial to saving production costs.

[0046] Furthermore, as Figure 2 、 Figure 3As shown, in the circumferential direction, the straight surface length of the straight surface portion 11 is D2. Among them, the side wall arc surface profile of the arc portion 12 is a positive circular arc surface, that is, the arc profile of the arc portion 12 is an arc profile with the same center as the center of the circle. The diameter of the arc portion 12 is D1, where D1 > D2, that is, the arc surface angle of the arc portion 12 is greater than 180 degrees. This can make the distribution of the N pole and S pole of the magnet 1 relatively uniform and avoid affecting the cooperation between the magnet 1 and the position sensor.

[0047] In another alternative embodiment of the present application, on the basis of any embodiment of the above-mentioned magnet 1, the helical gear assembly 2 of the electronic actuator is further improved; as Figure 1 、 Figure 4 shown, in this embodiment, the helical gear assembly 2 includes a mounting post 21, a sector gear 22 and an output shaft 23. The mounting post 21 and the output shaft 23 are of a columnar structure as a whole. One end of the mounting post 21 is connected to the magnet 1, and the other end is connected to the output shaft 23. The sector gear 22 is arranged along the circumferential outer side wall of the mounting post 21. Among them, the sector gear 22 is arranged at one end of the mounting post 21 close to the output shaft 23, and the sector gear 22 is used for meshing with the worm; in this embodiment, the center lines of the mounting post 21 and the output shaft 23 are on the same straight line.

[0048] Specifically, as Figure 1 、 Figures 4 to 6 shown, an installation groove 211 is provided at one end of the mounting post 21 away from the output shaft 23. The installation groove 211 is used for installing the magnet 1. The center line of the installation groove 211 is on the same straight line as the center line of the mounting post 21, that is, an installation groove 211 is provided at the upper end of the mounting post 21. The lower end of the mounting post 21 is connected to the output shaft 23. The installation groove 211 is recessed along the axial direction towards the center direction of the mounting post 21, that is, the installation groove 211 is recessed downward; as Figure 5 shown, the upper end of the installation groove 211 is opened on the upper end surface of the mounting post 21 so that after the magnet 1 is installed in the installation groove 211, the upper end surface of the magnet 1 can be exposed to act with the position sensor on the circuit board, avoiding affecting the induction sensitivity between the position sensor and the magnet 1; in this embodiment, the maximum diameter of the installation groove 211 is smaller than the diameter of the mounting post 21 to ensure that while the installation groove 211 can accommodate the magnet 1, it can also perform circumferential limit on the magnet 1 to ensure the stability of the connection between the magnet 1 and the mounting post 21, thereby improving the control accuracy of the electronic actuator for the turbocharger.

[0049] It should be noted that the depth of the installation groove 211 in the axial direction is greater than or equal to the thickness of the magnet 1, so as to avoid other influences caused by the outer end of the magnet 1 protruding from the surface of the installation groove 211.

[0050] Correspondingly, the shape structure of the installation groove 211 is preferably adapted to the shape structure of the magnet 1, as Figure 6As shown, the installation groove 211 includes a straight surface fitting portion 2111 and a curved surface fitting portion 2112. The side wall of the straight surface fitting portion 2111 is a straight surface, and the side wall of the curved surface fitting portion 2112 is an arc surface. When the magnet 1 is installed in the installation groove 211, the straight surface fitting portion 2111 cooperates with the straight surface portion 11 of the magnet 1, that is, the side wall of the straight surface fitting portion 2111 is opposite to the side wall of the straight surface portion 11, and the curved surface fitting portion 2112 cooperates with the arc portion 12 of the magnet 1, that is, the side wall of the curved surface fitting portion 2112 is opposite to the side wall of the arc portion 12. Thus, the installation groove 211 can better wrap and limit the magnet 1, so that the magnet 1 will not be greatly displaced in the installation groove 211, and the N pole and S pole of the magnet 1 are not easily changed.

[0051] Furthermore, the diameter of the curved surface fitting portion 2112 is greater than or equal to the diameter of the arc portion 12, and the length of the straight surface fitting portion 2111 is greater than or equal to the length of the straight surface portion 11. In this embodiment, the diameter of the curved surface fitting portion 2112 is preferably substantially the same as the diameter of the arc portion 12, and the length of the straight surface fitting portion 2111 is preferably substantially the same as the length of the straight surface portion 11. Then, the magnet 1 is not easily shaken in the installation groove 211, the connection stability between the magnet 1 and the installation post 21 is ensured, thereby improving the working stability of the magnet 1 during operation, and the control accuracy of the electronic actuator for the turbocharger is improved.

[0052] In another alternative embodiment of the present application, on the basis of any embodiment of the above helical gear assembly 2, further improvements are made; as Figure 1 、 Figures 4 to 6 As shown, the helical gear assembly 2 further includes a limiting ring 212. The limiting ring 212 is a ring structure. The limiting ring 212 is arranged at the opening end of the installation groove 211, that is, the limiting ring 212 is located at the end of the opening of the installation groove 211 on the installation post 21. The outer diameter of the limiting ring 212 is the same as the inner diameter of the installation groove 211, the inner diameter of the limiting ring 212 is smaller than the inner diameter of the installation groove 211, the outer side wall of the outer ring of the limiting ring 212 is connected to the inner side wall of the installation groove 211, and the upper end surface of the limiting ring 212 is flush with the upper end surface of the installation post 21, reducing the distance between the upper end surface of the magnet 1 and the position sensor; when the magnet 1 is installed in the installation groove 211, the limiting ring 212 cooperates with the installation groove 211 to fully limit the magnet 1 in the axial direction, ensuring the installation stability of the magnet 1 and the installation post 21. Moreover, the limiting ring 212 does not fully cover the upper surface of the magnet 1, so that at least part of the upper surface of the magnet 1 is exposed, so as to ensure that the upper end surface of the magnet 1 can act with the position sensor on the circuit board, ensuring the induction sensitivity between the position sensor and the magnet 1.

[0053] It should be noted that the distance between the end face of the limit ring 212 close to the bottom of the installation groove 211 and the bottom surface of the installation groove 211 is greater than or equal to the thickness of the magnet 1, that is, the distance between the bottom surface of the limit ring 212 and the bottom surface of the installation groove 211 is greater than or equal to the thickness of the magnet 1, so as to ensure that the space formed between the limit ring 212 and the installation groove 211 can accommodate the magnet 1; in this embodiment, the distance between the bottom surface of the limit ring 212 and the bottom surface of the installation groove 211 is preferably equal to the thickness of the magnet 1, so that the magnet 1 is not easily shaken in the installation groove 211, avoiding affecting the cooperation sensitivity with the position sensor.

[0054] In addition, in this embodiment, the limit ring 212 can also be composed of multiple arc-shaped or other-shaped limit protrusions, that is, the limit ring 212 can be not a completely closed ring structure, or an incompletely closed ring structure composed of multiple sheet-shaped limit protrusions. It only needs to be ensured that the multiple limit protrusions are arranged along the same center of the circle, and the multiple limit protrusions protrude towards the center direction in the radial direction, and the outer side walls of the multiple limit protrusions are on the same center arc, and the inner side walls are on the same center arc.

[0055] Furthermore, the installation post 21 is further improved; as Figure 5 、 Figure 6 shown, at least one positioning groove 213 is provided on the installation post 21. The positioning grooves 213 are arranged at equal circumferential intervals along the installation groove 211. The positioning grooves 213 open on the end face of the installation post 21. One side of the positioning groove 213 close to the center of the installation post 21 communicates with the installation groove 211, and the bottom surface of the positioning groove 213 is flush with the bottom surface of the installation groove 211. In this embodiment, four positioning grooves 213 are provided, and the included angle between two adjacent positioning grooves 213 is 90 degrees. One of the positioning grooves 213 corresponds to the straight surface matching part 2111 of the installation groove 211. By providing the positioning grooves 213, when the installation post 21 is injection-molded, a positioning post can be set in the injection mold, and the magnet 1 can be placed in the limiting space formed by the positioning post in advance. The positioning post is used to position the magnet 1. After the installation post 21 is injection-molded, the magnet 1 can be integrally formed with the installation post 21, reducing the subsequent process of installing the magnet 1 into the installation post 21, improving the production efficiency and reducing the subsequent assembly cost; while the positioning post correspondingly forms the positioning groove 213. At the same time, such a structural setting can also reduce the manufacturing material of the positioning post and save the manufacturing cost.

[0056] And making one of the positioning grooves 213 correspond to the straight surface matching part 2111 of the installation groove 211 can facilitate the pairing and positioning of the straight surface part 11 of the magnet 1 with the positioning post corresponding to the positioning groove 213 when the magnet 1 is placed in the mold, ensuring the correct assembly position of the magnet 1 in the installation post 21 after the installation post 21 is injection-molded.

[0057] And, as Figure 6As shown, in the direction parallel to the straight surface of the straight surface mating portion 2111, the width of the positioning groove 213 is smaller than the length of the straight surface of the straight surface mating portion 2111, thereby preventing the magnet 1 from moving into the positioning groove 213 from the direction of the straight surface mating portion 2111 and ensuring the stable effect of the magnet 1.

[0058] Furthermore, as Figure 5 shown, a limiting block 214 is provided on one side of the positioning groove 213 close to the mounting groove 211. The bottom of the limiting block 214 is connected to the bottom surface of the positioning groove 213. The limiting block 214 extends axially in a direction away from the center of the mounting post 21. The axial length of the limiting block 214 is smaller than the depth of the mounting groove 211, that is, there is a certain distance between the upper end of the limiting block 214 and the bottom surface of the limiting ring 212. This can save costs while ensuring the positioning effect of the positioning post on the magnet 1. At the same time, the limiting block 214 can limit the circumference of the magnet 1 after the magnet 1 and the mounting post 21 are formed, making the magnet 1 not easy to shake, further improving the connection stability of the magnet 1 in the mounting post 21, thereby further improving the sensitivity of the cooperation between the magnet 1 and the position sensor and improving the control accuracy of the electronic actuator for the turbocharger.

[0059] As Figure 5 shown, the side wall of the limiting block 214 facing the mounting groove 211 is an inclined surface, so that the limiting block 214 is a tapered structure with a narrow upper part and a wide lower part. While saving materials, it can ensure the connection firmness between the limiting block 214 and the bottom surface of the positioning groove 213.

[0060] It should be noted that in the case where the embodiments of the present application do not conflict with each other and the technical solutions can coexist, they can be arbitrarily combined into new embodiments.

[0061] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An electronic actuator for a turbocharger, characterized in that: It comprises a magnet (1), wherein the side wall of the magnet (1) comprises an arc-shaped portion (12) and a straight surface portion (11), wherein the straight surface portion (11) is of N grade or S grade.

2. The electronic actuator for a turbocharger according to claim 1, characterized in that: The diameter of the arc-shaped portion (12) is D1, and the length of the straight portion (11) is D2, wherein D1>D2.

3. The electronic actuator for a turbocharger according to any one of claims 1 or 2, characterized in that: It also comprises a helical gear assembly (2), wherein the helical gear assembly (2) is provided with a mounting column (21), and one end of the mounting column (21) is connected to the magnet (1).

4. The electronic actuator for a turbocharger according to claim 3, characterized in that: The end of the mounting column (21) is provided with a mounting groove (211), the mounting groove (211) is recessed in the axial direction toward the center of the mounting column (21), and the mounting groove (211) is used to mount the magnet (1); The center line of the installation groove (211) and the center line of the installation column (21) are on the same straight line.

5. The electronic actuator for a turbocharger according to claim 4, characterized in that: The helical gear assembly (2) further comprises a limiting ring (212), wherein the limiting ring (212) is connected to the open end of the mounting groove (211), an outer wall of the limiting ring (212) is connected to an inner wall of the mounting groove (211), and an inner diameter of the limiting ring (212) is smaller than a diameter of the magnet (1).

6. The electronic actuator for a turbocharger according to claim 5, characterized in that: The end face of the limiting ring (212) is flush with the end face of the mounting column (21), and the distance between the end face of the limiting ring (212) close to the bottom of the mounting groove (211) and the bottom face of the mounting groove (211) is greater than or equal to the thickness of the magnet (1).

7. The electronic actuator for a turbocharger according to claim 4, characterized in that: The mounting groove (211) comprises a straight surface matching portion (2111) and a curved surface matching portion (2112), the side wall of the curved surface matching portion (2112) being opposite to the side wall of the arc-shaped portion (12), and the side wall of the straight surface matching portion (2111) being opposite to the side wall of the straight surface portion (11); The diameter of the arc surface matching portion (2112) is greater than or equal to the diameter of the arc-shaped portion (12); The length of the straight surface matching portion (2111) is greater than or equal to the length of the straight surface portion (11).

8. The electronic actuator for a turbocharger according to claim 4, characterized in that: The mounting column (21) is provided with at least one positioning groove (213), and the positioning grooves (213) are arranged at equal intervals along the circumference of the mounting groove (211). Wherein, the positioning groove (213) is communicated with the installation groove (211).

9. The electronic actuator for a turbocharger according to claim 8, characterized in that: A limiting block (214) is provided on one side of the positioning groove (213) close to the mounting groove (211); the limiting block (214) extends axially in a direction away from the center of the mounting column (21); the bottom of the limiting block (214) is connected to the bottom surface of the positioning groove (213); and the axial length of the limiting block (214) is less than the depth of the mounting groove (211); Wherein, the side wall of the limiting block (214) facing the installation groove (211) is an inclined surface.

10. The electronic actuator for a turbocharger according to claim 3, characterized in that: The helical gear assembly (2) further comprises a sector tooth (22) and an output shaft (23), wherein the output shaft (23) is connected to the end of the mounting column (21) away from the magnet (1), and the sector tooth (22) is connected to the side wall of the mounting column (21).

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