Rotary transformer stator fixing device, motor and vehicle

Abstract

The utility model relates to a resolver stator fixing device, a motor and a vehicle, the resolver stator fixing device comprises a motor cover body, a resolver stator and a clip, the resolver stator is lapped on the inner side of the motor cover body, and the resolver stator is connected with the clip; the motor cover body is provided with a first groove, the clip is inserted into the first groove, the upper part of the clip is provided with an extension part which is pressed against the rotary transformer stator, and the side wall of the clip and the inner wall of the groove are provided with mutually matched plug-in structures. The clamp with the pin is used for replacing an existing bolt structure to position the rotary transformer stator, the extending portion on the upper portion of the clamp is used for axially positioning the rotary transformer stator, the pin on the clamp replaces a positioning key to conduct radial positioning, in addition, due to the fact that the pin is movably connected to the clamp, the pin can be inserted into a positioning hole in different forms, and radial positioning is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of resolver stator fixing, in particular to a resolver stator fixing device, a motor and a vehicle. Background Art

[0002] A resolver stator is an important component responsible for generating a magnetic field in a resolver electromechanical device. In the field of vehicles, a vehicle resolver stator is a part of a resolver and together with a rotor forms a resolver. A resolver is a position sensor that can accurately detect the position, direction and speed of the rotor and is used to control the direction and speed of a drive motor or a generator (for energy recovery). The resolver stator is usually fixed on the housing at the end of the motor shaft.

[0003] The existing resolver stator fixing method uses a pressing plate and bolts to press and fix the resolver stator. However, due to the stacking height tolerance of the resolver stator, an ineliminable gap is generated between the pressing plate and the housing, which will cause the attenuation of the bolt torque and cannot ensure the stability of the resolver stator positioning. Summary of the Utility Model

[0004] In order to solve the above technical problem that the stacking height tolerance of the resolver stator causes the attenuation of the positioning bolt torque and leads to positioning loosening, the utility model provides a resolver stator fixing device, a motor and a vehicle.

[0005] To achieve the above object, the utility model provides a resolver stator fixing device, including: a motor cover, a resolver stator and a clip. The resolver stator is lapped inside the motor cover, and the resolver stator is connected to the clip; a first groove is provided on the motor cover, the clip is inserted into the first groove, an extension part pressing against the resolver stator is provided on the upper part of the clip, and an insertion structure that cooperates with each other is provided on the side wall of the clip and the inner wall of the groove.

[0006] Further, a second groove is provided on the second lapping part, and the position of the second groove corresponds to that of the first groove. When the clip is inserted into the first groove, it is simultaneously inserted into the second groove.

[0007] Further, a pin is provided on the side wall of the clip, the pin is movably connected to the clip, a positioning hole is provided on the inner wall of the groove, and the pin can extend into the positioning hole.

[0008] Further, a pin hole is provided on the side wall of the clip, and the pin is arranged in the pin hole.

[0009] Further, an elastic member is further provided inside the pin hole, the sum of the length of the elastic member and the length of the pin is greater than the depth of the pin hole, and the inner diameter of the pin hole is greater than the diameter of the pin.

[0010] Furthermore, the head of the pin extending from one end of the pin hole is circular.

[0011] Furthermore, a first lapping portion is provided on the inner wall of the motor cover body, and the bottom surface of the first groove is flush with the upper surface of the first lapping portion.

[0012] Furthermore, a second lapping portion is provided on the side wall of the resolver stator, the extending portion abuts against the upper surface of the second lapping portion, and the lower surface of the second lapping portion lapped with the first lapping portion.

[0013] Another object of the present embodiment is to provide a motor provided with the above-mentioned resolver stator fixing device.

[0014] Another object of the present embodiment is to provide a vehicle provided with the above-mentioned resolver stator fixing device.

[0015] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0016] (1) Using a clip with a pin to replace the existing bolt structure for positioning the resolver stator. The extending portion on the upper part of the clip performs axial positioning on the resolver stator, and the pin on the clip replaces the positioning key for radial positioning. In addition, since the pin is movably connected to the clip, the pin can be inserted into the positioning hole in different forms to complete radial positioning;

[0017] (2) The clip and the elastic member are jointly arranged in the pin hole. During installation, the pin is inserted into the positioning hole by the elastic force of the elastic member;

[0018] (3) The head of the pin is set to be circular, which is convenient for changing the insertion direction of the pin. In addition, the diameter of the pin hole is larger than the diameter of the pin, which is also convenient for the pin to tilt in the pin hole. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a cross-sectional view of the resolver stator fixing device of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the clip of the resolver stator fixing device of the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the resolver stator of the resolver stator fixing device of the present utility model

[0023] Figure 4 The utility model is an assembly diagram of a rotating stator fixing device.

[0024] Explanation of the reference numerals in the specification: motor cover body -1; first overlapping part -110; rotating stator -2; second overlapping part -210; clip -3; first groove -4; extension part -5; pin -6; positioning hole -7; pin hole -8; elastic component -9; second groove -10. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary persons in the field without creative work should fall within the scope of protection of the utility model.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] The utility model is described in detail with reference to the schematic diagram. When describing the embodiments of the utility model, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the utility model. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, left, right, inside and outside" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Unless otherwise clearly specified and defined in the present utility model, the terms "installation, connection, and coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, and may also be indirectly connected through an intermediate medium, or may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Embodiment 1

[0032] The resolver stator 2 refers to the stator part in a resolver. The stack height tolerance means that during the stacking process of laminations, due to factors such as manufacturing errors and material properties, there is a deviation between the stacking height and the ideal value, and this deviation is the so-called "stack height tolerance". During the manufacturing process of a motor, the stator is usually composed of multiple stacked laminations, and these laminations generate stack height tolerance during the stacking process, and it may vary depending on the motor type, specifications, manufacturer, and application scenario. When positioning the resolver stator 2 inside the motor, in the existing fixing method using a pressing plate and bolts, during fixing, due to the stack height tolerance of the resolver stator 2, there is a height difference between the resolver stator 2 and the motor housing. When using the pressing plate to fix, the pressing plate presses against the resolver stator 2, but there is a gap of about 0.3 - 0.5 mm between the pressing plate and the motor housing. When the bolts are tightened, the gap cannot be eliminated, so the bolt torque will decay, which will further reduce the fastening performance of the bolt connection, and even cause loosening and failure, affecting the fixing effect of the resolver stator 2.

[0033] The following refers to Figures 1 to 4Describe a resolver stator fixing device according to an embodiment of the present utility model, which includes a motor cover 1, a resolver stator 2, and a clip 3. The resolver stator 2 is lapped on the inner side of the motor cover 1. It should be noted that the motor cover 1 and the resolver stator 2 can be of a closed circular structure. The outer wall of the resolver stator 2 is lapped with the inner wall of the motor cover 1 to axially position the resolver stator 2. A first groove 4 is provided on the motor cover 1, and the clip 3 is inserted into the first groove 4 to fix the resolver stator 2 through the clip. An extension 5 for pressing against the resolver stator 2 is provided on the upper part of the clip 3. Since the clip 3 is lapped on the inner side of the motor cover 2 and the extension 5 on the upper part of the clip 3 presses against the resolver stator 2, axial fixation of the resolver stator 2 is achieved. A plug-in structure that cooperates with each other is provided between the side wall of the clip 3 and the inner wall of the groove 4. In this embodiment, a pin 6 is provided on the side wall of the clip 3, and the pin 6 is movably connected to the clip 3. A positioning hole 7 that cooperates with the pin 6 is provided on the inner wall of the first groove 4. During assembly, the clip 3 extends from the first groove 4, and the pin 6 extends into the positioning hole 7 on the inner wall of the first groove 4. Due to the stack height tolerance of the resolver stator 2, the positions of the pin 6 and the positioning hole 7 may not be completely aligned. However, since the pin 6 is movably connected to the clip 3, the pin 6 can adjust its inclination angle according to the position of the positioning hole 7 to ensure that the pin 6 extends into the positioning hole 7 and achieve radial positioning of the resolver stator 2. It should be noted that in this embodiment, a plurality of the first grooves 4 and the clips 3 can be evenly provided along the inner circumference of the motor cover 1 to enhance the positioning effect.

[0034] In one embodiment, referring to Figure 3 , a second groove 10 is provided on the resolver stator 2, and the position of the second groove 10 corresponds to that of the first groove 4. When the clip 3 is inserted into the first groove 4, it is simultaneously inserted into the second groove 10 to perform radial positioning between the clip 3 and the resolver stator 2. Therefore, when the stator 3 is with.

[0035] In one embodiment, a pin hole 8 is provided on the side wall of the clip 3, and the pin 6 is arranged in the pin hole 8. The pin hole 8 provides space for the movement of the pin 6 to facilitate inserting the clip 3 into the first groove 4.

[0036] In one embodiment, an elastic member 9 is further provided inside the pin hole 6. The sum of the length of the elastic member 9 and the length of the pin 6 is greater than the depth of the pin hole 8. Further, the elastic member 9 can be connected to the pin 6. During assembly, first insert the clip 3 into the first groove 4. Since the sum of the length of the elastic member 9 and the length of the pin 6 is greater than the depth of the pin hole 8, the pin 6 protrudes from the side wall of the clip 3. During the insertion process, the motor housing 1 will exert pressure on the pin 6, and the pin 6 transmits the pressure to the elastic member 9. When the pin 6 reaches the positioning hole 7, the elastic member 9 releases the pressure, pops the pin 6 outwards and makes the pin 6 extend into the positioning hole 7 to achieve radial positioning of the resolver stator 2.

[0037] In one embodiment, the head of the pin 6 extending from one end of the pin hole 8 is circular. When the pin 6 extends into the positioning hole 7, due to the stacking height tolerance of the resolver stator 2, there will be an incomplete alignment between the pin hole 8 and the positioning hole 7. The circular head of the pin 6 facilitates tilting the pin 6 when it contacts the edge of the positioning hole 7 and sliding it into the positioning hole 7. Moreover, the inner diameter of the pin hole 8 is larger than the diameter of the pin 6, providing a tilting space for the pin 6.

[0038] In one embodiment, a first lapping portion 110 is provided on the inner wall of the motor cover 1. The bottom surface of the first groove 4 is flush with the upper surface of the first lapping portion 110 to ensure the flatness of the bottom contact surface of the clip 3. Further, a second lapping portion 210 is provided on the side wall of the resolver stator 2. The extension portion 5 presses against the upper surface of the second lapping portion 210, and the lower surface of the second lapping portion 210 lapped with the first lapping portion 110. The setting of the two lapping portions positions the motor cover 1 and the resolver stator 2 axially.

[0039] The working principle of the resolver stator fixing device provided in this embodiment is as follows: First, the resolver stator 2 is lapped in the middle of the motor cover 1, and the clip 3 on the resolver stator 2 is aligned with the second groove 10 on it and the first groove 4 on the motor cover 1. The clip 3 is inserted into the first groove 4 and the second groove 10. When inserted, the pin 6 on the side wall of the clip 3 is pressed into the pin hole 8. Due to the stacking height tolerance of the resolver stator, during assembly, the pin hole 8 on the clip 3 and the positioning hole 7 on the motor housing 1 are not completely aligned, and the position of the pin hole 8 is slightly higher. After the clip 3 is inserted to a certain position, the pin 6 with a circular head is obliquely inserted into the positioning hole 7 under the elastic action of the elastic member 9, playing a fixing role and realizing the radial positioning of the resolver stator 2. And after the clip 3 is inserted to the appropriate position, the extension portion 5 on the upper part of the clip 3 presses against the upper surface of the resolver stator 2, thus achieving the effect of axially positioning the resolver stator 2. At this time, the fixing of the resolver stator 2 is completed.

[0040] Embodiment Two

[0041] Different from the above embodiment, this embodiment provides a motor equipped with the above resolver stator fixing device. The resolver stator fixing device avoids the unstable fixing between the resolver stator 2 and the motor housing 1 caused by the stacking height tolerance, ensures the measurement accuracy, reduces the risk of motor failure, and improves the service life of the motor.

[0042] Embodiment Three

[0043] Different from the above embodiments, this embodiment provides a vehicle, which is provided with the above resolver stator fixing device. The resolver stator fixing device avoids the unstable fixing between the resolver stator 2 and the motor housing 1 caused by the stacking height tolerance, ensures the measurement accuracy, improves the service life, and is easy for vehicle assembly and maintenance.

[0044] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotating stator fixing device, characterized in that: It comprises a motor cover (1), a rotary transformer stator (2) and a clip (3), wherein the rotary transformer stator (2) is overlapped on the inner side of the motor cover (1), and the rotary transformer stator (2) is connected to the clip (3); A first groove (4) is provided on the motor cover (1), the clip (3) is inserted into the first groove (4), an extension portion (5) for pressing against the rotary stator (2) is provided on the upper portion of the clip (3), and a plug-in structure that cooperates with the side wall of the clip (3) and the inner wall of the groove (4) is provided.

2. The resolver stator fixing device according to claim 1, characterized in that: A second groove (10) is provided on the rotary transformer stator (2), the second groove (10) corresponds to the position of the first groove (4), and when the clip (3) is inserted into the first groove (4), it is also inserted into the second groove (10).

3. The resolver stator fixing device according to claim 1, characterized in that: A pin (6) is arranged on the side wall of the clip (3), and the pin (6) is movably connected to the clip (3). A positioning hole (7) is arranged on the inner wall of the groove (4), and the pin (6) can extend into the positioning hole (7).

4. The resolver stator fixing device according to claim 3, characterized in that: A pin hole (8) is provided on the side wall of the clip (3), and the pin (6) is arranged in the pin hole (8).

5. The resolver stator fixing device according to claim 4, characterized in that: An elastic component (9) is also arranged inside the pin hole (8), the sum of the length of the elastic component (9) and the length of the pin (6) is greater than the depth of the pin hole (8), and the inner diameter of the pin hole (8) is greater than the diameter of the pin (6).

6. The resolver stator fixing device according to claim 4, characterized in that: The head of the pin (6) extending out of one end of the pin hole (8) is round.

7. The resolver stator fixing device according to claim 1, characterized in that: A first overlapping portion (110) is provided on the inner wall of the motor cover (1), and the bottom surface of the first groove (4) is flush with the upper surface of the first overlapping portion (110).

8. The resolver stator fixing device according to claim 7, characterized in that: A second overlapping portion (210) is provided on the side wall of the rotary transformer stator (2), the extension portion (5) is pressed against the upper surface of the second overlapping portion (210), and the lower surface of the second overlapping portion (210) overlaps with the first overlapping portion (110).

9. A motor, characterized in that: The invention comprises the rotating stator fixing device as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: The invention comprises the rotating stator fixing device as claimed in any one of claims 1 to 8.

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