Mounting structure of sensor sensing target, motor and vehicle driving system

Abstract

The invention provides a mounting structure of a sensor sensing target, a motor and a vehicle driving system, the mounting structure of the sensor sensing target comprises the sensor sensing target, the sensor sensing target comprises a sensing target main body and a plurality of finger parts, the sensing target main body is in a circular ring shape, and the plurality of finger parts are connected to the peripheral part of the sensing target main body; the rotor support is provided with an annular groove, the annular groove is cut off by a plurality of first notches and at least one second notch, the first notches are opened on the sensor sensing target loading side of the annular groove, the finger parts can be arranged in the first notches in the axial direction of the rotor support, and the second notches are located beside the first notches; in the state that the sensor sensing target is installed on the rotor support, part of the multiple finger parts are squeezed and deformed towards the radial inner side by the outer circumferential wall of the annular groove, at least one second notch accommodates at least one finger part of the multiple finger parts, and the axial position of the sensor sensing target is directly limited by the two axial side walls of the annular groove.

Description

Technical Field

[0001] The present application relates to a mounting structure for a sensor sensing a target, a motor and a vehicle driving system. Background Art

[0002] Sensors such as eddy current sensors may be mounted on the motor to measure the angular position of the motor's rotor, which data is important for controlling the motor to operate efficiently.

[0003] like Figure 1 and Figure 2 As shown, a possible installation structure of a sensor sensing target includes a sensor sensing target 100, a rotor bracket 200, a motor rotor 300 and a snap ring 400. The motor rotor 300 is sleeved and installed on the rotor bracket 200, and a ring groove is provided on the inner circumference of the rotor bracket 200. The sensor sensing target 100 is installed in the ring groove of the rotor bracket 200 through the snap ring 400. The snap ring 400 can apply an axial force to the sensor sensing target 100 so that there is no gap between the two. The sensor sensing target 100 is provided with a circumferential locking portion 101, a snap ring stop nose 102 and a plurality of centering protrusions 103. The circumferential locking portion 101 can cooperate with the ring groove to prevent the sensor sensing target 100 from rotating relative to the rotor bracket 200. The snap ring stop nose 102 can cooperate with the snap ring 400 to prevent the snap ring 400 from having a large displacement in the circumferential direction relative to the sensor sensing target 100, thereby preventing the snap ring 400 from falling off. The plurality of centering protrusions 103 may cooperate with the annular groove to radially position the sensor sensing target 100 .

[0004] However, the above-mentioned installation structure of the sensor sensing target has the following disadvantages.

[0005] (1) The sensor sensing target 100 is fixed by the clamp ring 400, which uses more parts and makes the cost higher.

[0006] (2) The annular groove needs to accommodate the sensor sensing target 100 and the retaining ring 400, and is also provided with a structure to prevent the sensor sensing target 100 from rotating. Therefore, the contour of the annular groove is complex, which has an adverse effect on the manufacturing cycle and cost of the rotor bracket 200.

[0007] (3) The sensor sensing target is fixed by being squeezed by the ring groove and the clamping ring 400. The surface vibration of the sensor sensing target is not easy to control, which affects the stability of the sensor performance. Summary of the invention

[0008] The present application aims to propose a mounting structure for a sensor sensing target, a motor and a vehicle drive system to solve or alleviate at least one disadvantage of the above-mentioned prior art.

[0009] The embodiment of the present application provides a mounting structure for a sensor to sense a target, including:

[0010] A sensor sensing target, wherein the sensor sensing target comprises a sensing target body and a plurality of fingers, wherein the sensing target body is annular, and the plurality of fingers are connected to the outer periphery of the sensing target body; and

[0011] A rotor support, wherein the rotor support is provided with an annular groove, the annular groove is interrupted by a plurality of first notches and at least one second notch, the first notch is open on the sensor sensing target installation side of the annular groove, the finger can be inserted into the first notch along the axial direction of the rotor support, and the second notch is located next to the first notch,

[0012] When the sensor sensing target is installed on the rotor bracket, some of the multiple fingers are squeezed and deformed radially inward by the outer peripheral wall of the annular groove, and the at least one second notch accommodates at least one of the multiple fingers. The circumferential side wall of the second notch prevents the sensor sensing target from rotating relative to the rotor bracket, and the two axial side walls of the annular groove directly limit the axial position of the sensor sensing target.

[0013] In at least one possible embodiment, the outer peripheral wall of the first notch is located radially outside the outer peripheral wall of the annular groove, and the outer peripheral wall of the second notch is located radially outside the outer peripheral wall of the annular groove.

[0014] The side wall of the first notch on one axial side is flush with the side wall of the annular groove on one axial side, and the side wall of the second notch on one axial side is flush with the side wall of the annular groove on one axial side.

[0015] In at least one possible implementation manner, the outer peripheral wall of the annular groove is formed as a flat arc surface with a uniform diameter.

[0016] In at least one possible embodiment, the side wall of the annular groove located on the sensor sensing target insertion side forms a slope, and the radial outer side of the slope is closer to the axial middle position of the rotor bracket than the radial inner side, so that the slope can apply axial force to the finger in the annular groove.

[0017] In at least one possible implementation, the number of the second notches is less than the number of the first notches, and the difference between the number of the first notches and the number of the second notches is 3.

[0018] When the sensor sensing target is mounted on the rotor bracket, three of the fingers are not located in the first notch or the second notch and are thus squeezed by the wall of the annular groove.

[0019] In at least one possible embodiment, the finger portion can be elastically compressed radially inward of the sensor sensing target.

[0020] The finger portion extends from the outer circumferential surface of the sensing target body at an angle relative to the radial direction of the sensor sensing target, and the finger portion can unidirectionally rotate from the first notch along the circumferential direction of the annular groove into the annular groove.

[0021] In at least one possible implementation, the other side wall of the annular groove opposite to the inclined surface is a plane, the plane is perpendicular to the central axis of the annular groove, and the finger portion abuts against the plane.

[0022] In at least one possible implementation, the sensor sensing target is an eddy current sensor sensing target, and the circumferential size of the second notch is smaller than the circumferential size of the first notch.

[0023] The number of the first notch and the number of the fingers are the same, that is, four of the first notch and four of the fingers are provided, and one of the second notch is provided.

[0024] An embodiment of the present application further proposes a motor, which includes a mounting structure for a sensor sensing a target as described in any one of the above technical solutions.

[0025] The embodiment of the present application further proposes a vehicle driving system, comprising an installation structure for a sensor sensing a target as described in any one of the above technical solutions.

[0026] By adopting the above technical solution, the installation structure of the sensor sensing target of the present application can obtain at least one of the following beneficial effects.

[0027] (1) The sensor can sense the target and can be installed in the ring groove of the rotor bracket through its own structure. It uses fewer parts, is easy to assemble, and has a low cost.

[0028] (2) The outer peripheral wall of the annular groove is a flat arc shape with a simple structure, thereby reducing the cost of the rotor bracket and shortening the manufacturing cycle.

[0029] (3) Through radial and axial positioning of the finger, the radial tolerance fluctuation of the sensor sensing target is small, only the finger of the sensor sensing target is squeezed, the surface runout is easy to control, and the sensor probe and the sensor sensing target have a stable axial air gap to ensure high detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 and Figure 2 A schematic diagram showing a possible installation structure of a sensor sensing target.

[0031] Figure 3A schematic diagram showing an installation structure of a sensor sensing target according to an embodiment of the present application.

[0032] Figure 4 A schematic structural diagram of a sensor sensing target is shown, showing a mounting structure of the sensor sensing target according to an embodiment of the present application.

[0033] Figure 5 A schematic structural diagram of a rotor bracket of a mounting structure of a sensor sensing target according to an embodiment of the present application is shown.

[0034] Figure 6 , Figure 7 and Figure 8 A partially enlarged view of a rotor bracket showing a mounting structure of a sensor sensing target according to an embodiment of the present application.

[0035] Fig. 9 Shows Figure 8 Section view along line AA.

[0036] Fig.10 A partially enlarged view of a rotor bracket showing a mounting structure of a sensor sensing target according to an embodiment of the present application.

[0037] Fig.11 Shows Fig.10 Sectional view along line BB.

[0038] Figure 12 to Figure 14 A schematic diagram showing the process of installing the sensor sensing target on the rotor bracket.

[0039] Description of Reference Numerals

[0040] 100 sensor sensing target 101 circumferential locking portion 102 snap ring stop nose 103 centering convex portion

[0041] 200 rotor bracket 300 motor rotor 400 retaining ring

[0042] 1. Sensing target subject

[0043] 2 fingers

[0044] 3. Assembly and fitting part

[0045] 4 Baffle

[0046] 5 annular groove 51 first notch 52 second notch 53 inclined surface

[0047] A axial direction C circumferential direction R radial direction DETAILED DESCRIPTION

[0048] In order to more clearly explain the above-mentioned purposes, features and advantages of the present application, the specific implementation methods of the present application are described in detail in this section in conjunction with the accompanying drawings. In addition to the various implementation methods described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions, so the present application is not limited by the specific embodiments disclosed in this section. The scope of protection of the present application shall be subject to the claims.

[0049] like Figures 3 to 14 As shown, an embodiment of the present application proposes an installation structure for a sensor sensing target, which includes a sensor sensing target (or called a sensor rotor) 100 and a rotor bracket 200. The rotor bracket 200 can be connected to a motor rotor 300, and the motor rotor 300 can be sleeved on the radial outer side of the rotor bracket 200.

[0050] The sensor may be, for example, an eddy current sensor, which may include an eddy current sensor probe (or eddy current sensor stator) and an eddy current sensor sensing target (or eddy current sensor rotor). During operation, the eddy current sensor probe and the eddy current sensor sensing target are not in contact, and the eddy current sensor can perform non-contact measurement, has high tolerance to the working environment, and is low in cost, and plays an important role in online detection and positioning measurement.

[0051] Of course, the sensor in the present application may also be another type of rotor sensor, which may in particular measure the rotation speed and / or position of the rotor.

[0052] like Figure 3 and Figure 4 As shown, the sensor sensing target 100 may include a sensing target body 1 , a finger portion 2 , an assembly matching portion 3 and a baffle 4 .

[0053] The sensing target body 1 may be annular, and a plurality of baffles 4 are provided, and the plurality of baffles 4 are evenly spaced along the circumferential direction C of the sensing target body 1. The plurality of baffles 4 may be provided at the inner circumference of the sensing target body 1. The sensor probe and the baffle 4 may be at the same radial position, and as the motor rotor 300 rotates, the plurality of baffles 4 may intermittently pass through the sensor probe.

[0054] There may be a plurality of fingers 2, for example, there may be four fingers 2. The fingers 2 may be strip-shaped, and the fingers 2 may be connected to the outer peripheral surface of the sensing target body 1. The fingers 2 extend obliquely from the outer peripheral surface of the sensing target body 1 relative to the radial direction R of the sensor sensing target 100. Each finger 2 is inclined in the same direction. For example, when observed along the axial direction of the insertion ring groove 5 of the sensor sensing target 100, each finger 2 extends obliquely in the counterclockwise direction. When the finger 2 is squeezed by an external force, the finger 2 may elastically deform radially inward to reduce the radial size of the sensor sensing target 100, and the finger 2 may return to its original state after the external force is removed. A recess may be provided on the radial inner side of the finger 2, and the recess may accommodate the finger 2 when the finger 2 is elastically deformed radially inward.

[0055] The assembly fitting part 3 can be provided on the sensing target body 1, and a plurality of (for example, 4) assembly fitting parts 3 can be provided, and the assembly fitting parts 3 are used in conjunction with the installation tool. After the installation tool and the assembly fitting part 3 are connected in conjunction, the sensor sensing target 100 can be rotated by transmitting torque through the installation tool. For example, the assembly fitting part 3 can be a through hole, and the installation tool can be provided with a structure that cooperates with the assembly fitting part 3 in an embedded manner. In the process of installing the sensor sensing target 100 to the rotor bracket 200, it is not easy to directly rotate the sensor sensing target 100, and the sensor sensing target 100 can be conveniently rotated by the installation tool.

[0056] like Figures 5 to 11 As shown, the rotor bracket 200 may be cylindrical or include a cylindrical portion, and the inner circumferential surface of the rotor bracket 200 may be provided with an annular groove 5 , and the sensor sensing target 100 may be installed in the annular groove 5 by matching itself with the annular groove 5 .

[0057] The annular groove 5 may include two side walls, the annular groove 5 is located on the sensor sensing target loading side ( Figure 3 , Figure 6 , Fig. 9 and Fig.11 The side wall of the annular groove 5 (on the right side in the figure) forms an inclined surface 53, and the radial outer side of the inclined surface 53 is closer to the other side wall of the annular groove 5 (or, closer to the axial middle position of the rotor bracket 200) than the radial inner side.

[0058] When the sensor sensing target 100 is mounted on the rotor bracket 200, at least one finger 2 (for example, three fingers) can be squeezed and deformed by the inclined surface 53, and the inclined surface 53 can apply an axial force to the sensor sensing target 100, so that the sensor sensing target 100 abuts against the other side wall. The other side wall of the annular groove 5 opposite to the inclined surface 53 can be a plane, which is perpendicular to the central axis of the annular groove 5, and the finger 2 can be subjected to the axial force of the inclined surface 53 and abut against the plane.

[0059] The annular groove 5 may be interrupted by a first notch 51 and a second notch 52. The first notch 51 and the second notch 52 may be formed on the side where the sensor sensing target 100 of the annular groove 5 is inserted ( Figure 3 , Figure 6 , Fig. 9 and Fig.11 on the right side of the image.

[0060] See also Figure 7 The outer peripheral wall of the first notch 51 may be located radially outside the outer peripheral wall of the annular groove 5, and one axial side of the first notch 51 ( Figure 3 , Figure 6 , Fig. 9 and Fig.11 The side wall of the ring groove 5 (on the left side) can be flush with the side wall of the annular groove 5 on one axial side. A plurality of first notches 51 can be provided, and the number of first notches 51 is the same as the number of fingers 2. By aligning the fingers 2 with the first notches 51 and moving the sensor sensing target 100 along the axial direction A, the fingers 2 can be embedded in the first notches 51.

[0061] See also Figure 7 The outer peripheral wall of the second notch 52 may be located radially outside the outer peripheral wall of the annular groove 5, and the side wall ( Figure 3 , Figure 6 , Fig. 9 and Fig.11 The left side of the ring groove 5 (in the middle) can be flush with the side wall of one axial side of the ring groove 5. When the finger 2 is located in the second notch 52, the finger 2 can remain in its original shape without being squeezed and deformed by the outer peripheral wall (or bottom wall) of the ring groove 5. The circumferential side wall of the second notch 52 can limit the rotation of the finger 2, thereby limiting the rotation of the sensor sensing target 100 relative to the rotor bracket 200 in the circumferential direction C. If no external force is applied, the sensor sensing target 100 will not rotate relative to the rotor bracket 200.

[0062] like Figure 12 to Figure 14 As shown, the finger 2 can be unidirectionally moved from the first notch 51 along the circumference of the annular groove 5 (ie, Figure 7 , Fig.12 , Fig.13 The finger 2 is rotated clockwise relative to the rotor bracket 200 (clockwise direction in the figure) to enter the annular groove 5. In this embodiment, the finger 2 can rotate clockwise relative to the rotor bracket 200. When the sensor sensing target 100 is installed, part of the finger 2 can rotate clockwise from the first notch 51 to the second notch 52. When the sensor sensing target 100 is removed, part of the finger 2 can rotate clockwise from the second notch 52 to the first notch 51. If the finger 2 is driven to rotate counterclockwise relative to the rotor bracket 200, the end of the finger 2 will abut against the circumferential side of the first notch 51 or the second notch 52, thereby preventing the finger 2 (sensor sensing target 100) from further rotating.

[0063] It can be understood that the finger 2 needs to be deformed radially inward by force when rotating from the first notch 51 or the second notch 52 into the annular groove 5. Therefore, when the motor or the vehicle drive system works normally, at least one finger 2 is retained in the second notch 52, and the sensor sensing target is restricted from rotating relative to the rotor bracket.

[0064] The outer peripheral wall of the annular groove 5 is formed into a flat arc shape with a uniform diameter. That is, the outer peripheral wall of the annular groove 5 has no uneven structure in the axial direction A and the circumferential direction C, which makes the structure of the annular groove simple, easy to process, and has a short production cycle.

[0065] The number of the second notches 52 is less than the number of the first notches 51, and the difference between the number of the second notches 52 and the number of the first notches 51 can be 3, for example, the first notches 51 can be provided with 4, and the second notch 52 can be provided with one. When the sensor sensing target 100 is installed on the rotor bracket 200, one finger 2 is located at the position of the second notch 52, and three fingers 2 are in the annular groove 5, and are squeezed axially by the inclined surface 53 and the outer peripheral wall of the annular groove 5. The three fingers 2 can define a ring passing through the fingers 2, and the center of the sensor sensing target 100 can be made to coincide with the center of the rotor bracket 200 (central axis) through the three squeezed elastically deformed fingers 2. The sensor sensing target 100 is positioned in the radial direction R, so that the sensor can have a higher detection accuracy.

[0066] Optionally, the second notch 52 may be located next to the clockwise downstream side of the first notch 51. For example, the first notch 51 and the second notch 52 may be spaced 5 to 30 degrees apart. The circumferential dimension of the second notch 52 may be smaller than the circumferential dimension of the first notch 51, so that the finger 2 is difficult to rotate in the second notch 52.

[0067] Reference Figure 12 to Figure 14 The process of installing the sensor sensing target 100 on the rotor support 200 is described.

[0068] First, align the finger 2 with the first notch 51, and push the sensor sensing target 100 along the axial direction A (inward of the paper), so that the finger 2 can reach the plane of the other side wall of the annular groove 5. When the needle of the installation tool is inserted into the assembly matching part 3 of the assembly hole, for example, the sensor sensing target 100 is rotated clockwise relative to the rotor bracket 200 by twisting the installation tool, and the finger 2 is squeezed by the outer peripheral wall of the annular groove 5 and elastically deformed. Continue to rotate the sensor sensing target 100, and one of the multiple fingers 2 rotates to the position of the second notch 52. One finger 2 can restore the elastic deformation, so that the sensor sensing target 100 is positioned in the circumferential direction C, but the remaining three fingers 2 are still squeezed by the outer peripheral wall and the inclined surface 53 of the annular groove 5, so that the sensor sensing target 100 is positioned in the radial and axial directions.

[0069] The embodiment of the present application also proposes a motor, which may include a rotor assembly and a motor stator, and the motor is installed with a sensor, wherein the rotor assembly may include a mounting structure for the sensor to sense a target. The motor may be used in the field of vehicles.

[0070] The embodiment of the present application also proposes a vehicle drive system, which can be a pure electric drive system or a hybrid drive system, for example, the vehicle drive system can be a hybrid-specific gearbox. The hybrid-specific gearbox can include a motor and a speed change mechanism, and the motor can include a mounting structure for the above-mentioned sensor sensing target.

[0071] The installation structure of the sensor sensing target of the present application has the following beneficial effects.

[0072] (1) The sensor sensing target 100 can be installed in the annular groove 5 of the rotor bracket 200 through its own structure, which uses fewer parts, is convenient to assemble, and has a low cost.

[0073] (2) The outer peripheral wall of the annular groove 5 is in a flat arc shape with a simple structure, thereby reducing the cost of the rotor bracket 200 and shortening the manufacturing cycle.

[0074] (3) The radial and axial positioning of the finger 2 and the annular groove 5 is coordinated so that the radial tolerance fluctuation of the sensor sensing the target 100 is small.

[0075] (4) The sensor sensing target 100 is squeezed and fixed radially and axially by the finger 2. The other parts of the sensor sensing target 100 do not cooperate with the annular groove 5. There is no need for the entire outer periphery of the sensor sensing target 100 to be squeezed. The surface runout is easy to control. The sensor probe and the sensor sensing target 100 have a stable axial air gap, which can ensure a high detection accuracy.

[0076] The present application is not limited to the above embodiments, and those skilled in the art can make various modifications to the above embodiments of the present application under the guidance of the present application without departing from the scope of the present application. In addition, the following description is also made.

[0077] (1) In the above embodiment, four fingers 2 are provided, four first notches 51 are provided, and one second notch 52 is provided. However, the present application is not limited thereto. The fingers and the first notches may be provided in other numbers. For example, five fingers and the first notches may be provided, and two second notches may be provided.

[0078] (2) In the above embodiment, the difference between the number of the first notches 51 and the number of the second notches 52 is 3, but the present application is not limited thereto. For example, the number of the first notches 51 may be 4 or more greater than the number of the second notches 52 .

[0079] (3) In the above embodiment, the finger 2 extends obliquely from the outer peripheral surface of the sensing target body 1. However, the present application does not particularly limit the specific structure of the finger 2. The finger 2 only needs to be elastically deformable.

[0080] (4) In the above embodiment, the second notch 52 is formed as an open notch penetrating the side wall of the annular groove 5 on the side where the sensor sensing target is inserted. However, the present application is not limited thereto, and the second notch may not penetrate the side wall of the annular groove.

[0081] (5) In the above embodiment, the assembly matching portion 3 is a through hole. In other possible embodiments, the assembly matching portion may be a blind hole, a groove or a protrusion. Then, the assembly matching portion may be located on the other axial side of the sensing target body ( Figure 3 on the right side of the ).

[0082] It should be understood that at least some aspects or features of the above-mentioned implementation modes, embodiments or examples may be appropriately combined.

[0083] It is understood that in the present application, when the number of parts or components is not particularly limited, the number may be one or more, and the multiple here means two or more. For the case where the number of parts or components shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., the specific number is usually exemplary and not restrictive, and it can be understood as multiple, that is, two or more, but this does not mean that the present application excludes the case of one.

[0084] In the present application, unless otherwise clearly stated or limited, the terms such as "install", "assemble", "assemble", "connect", "connect", "couple", "link", "abut", "connect", "interconnect", "intercommunication", "conduction", "fixation", "fastening" and the like should be understood in a broad sense, for example, they can be direct or indirect. For example, regarding connection, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, regarding connectivity / conduction, it can be direct connectivity / conduction, or it can be indirect connectivity / conduction via an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0085] In the present application, unless otherwise clearly stated or limited, a component disposed on / installed on / located on / accommodated on / placed in, within, inside, etc. another component may be any of the following two situations: a part or most of the one component is located in the other component; and the one component is completely accommodated in the other component.

[0086] Although the present application is described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as a modified embodiment without departing from the subject matter and scope of the present application as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present application.

Claims

1. A mounting structure for a sensor to sense a target, characterized in that: include: A sensor sensing target (100), the sensor sensing target (100) comprising a sensing target body (1) and a plurality of fingers (2), the sensing target body (1) being in the shape of a ring, and the plurality of fingers (2) being connected to the outer periphery of the sensing target body (1); as well as A rotor support (200), the rotor support (200) being provided with an annular groove (5), the annular groove (5) being interrupted by a plurality of first notches (51) and at least one second notch (52), the first notch (51) being open on a sensor sensing target insertion side of the annular groove (5), the finger (2) being capable of being inserted into the first notch (51) along the axial direction of the rotor support (200), the second notch (52) being located beside the first notch (51), When the sensor sensing target (100) is mounted on the rotor bracket (200), some of the multiple fingers (2) are squeezed and deformed radially inward by the outer peripheral wall of the annular groove (5), and the at least one second notch (52) accommodates at least one of the multiple fingers (2). The circumferential side wall of the second notch (52) prevents the sensor sensing target (100) from rotating relative to the rotor bracket (200), and the two axial side walls of the annular groove (5) directly limit the axial position of the sensor sensing target (100).

2. The installation structure of the sensor sensing target according to claim 1, characterized in that: The outer peripheral wall of the first notch (51) is located radially outside the outer peripheral wall of the annular groove (5), and the outer peripheral wall of the second notch (52) is located radially outside the outer peripheral wall of the annular groove (5). The side wall on one axial side of the first notch (51) is flush with the side wall on one axial side of the annular groove (5), and the side wall on one axial side of the second notch (52) is flush with the side wall on one axial side of the annular groove (5).

3. The installation structure of the sensor sensing target according to claim 1, characterized in that: The outer peripheral wall of the annular groove (5) is formed into a flat arc surface with a uniform diameter.

4. The installation structure of the sensor sensing target according to claim 1, characterized in that: The side wall of the annular groove (5) located on the side where the sensor sensing target is inserted forms an inclined surface (53), and the radial outer side of the inclined surface (53) is closer to the axial middle position of the rotor bracket (200) than the radial inner side, so that the inclined surface (53) can apply an axial force to the finger (2) in the annular groove.

5. The installation structure of the sensor sensing target according to claim 1, characterized in that: The number of the second notches (52) is less than the number of the first notches (51), and the difference between the number of the first notches (51) and the number of the second notches (52) is 3. When the sensor sensing target (100) is installed on the rotor bracket (200), three of the fingers (2) are not located in the first notch (51) or the second notch (52) and are thus squeezed by the wall of the annular groove (5).

6. The installation structure of the sensor sensing target according to claim 1, characterized in that: The finger (2) can be elastically compressed radially inward of the sensor sensing target (100), The finger (2) extends obliquely from the outer peripheral surface of the sensing target body (1) relative to the radial direction (R) of the sensor sensing target (100), and the finger (2) can be rotated unidirectionally from the first notch (51) along the circumference of the annular groove (5) into the annular groove (5).

7. The installation structure of the sensor sensing target according to claim 4, characterized in that: The other side wall of the annular groove (5) opposite to the inclined surface (53) is a plane, which is perpendicular to the central axis of the annular groove (5), and the finger portion (2) abuts against the plane.

8. The installation structure of the sensor sensing target according to claim 1, characterized in that: The sensor sensing target is an eddy current sensor sensing target, the circumferential dimension of the second notch (52) is smaller than the circumferential dimension of the first notch (51), The number of the first notch (51) and the number of the finger portion (2) are the same, namely, four of each of the first notch (51) and the finger portion (2) are provided, and one of the second notch (52) is provided.

9. A motor, characterized in that: It comprises the mounting structure of the sensor sensing target according to any one of claims 1 to 8.

10. A vehicle driving system, characterized in that: A mounting structure for a sensor sensing target comprising any one of claims 1 to 8.

Images