Motor stator core limiting mechanism

Abstract

The utility model discloses a motor stator iron core limiting mechanism, which relates to the technical field of electric automobiles and comprises a motor base, a stator iron core and a buckle. The end part of the motor base is provided with a plurality of mounting parts along the circumferential direction, and the outer wall of the stator core is provided with a plurality of abdicating grooves corresponding to the mounting parts; the buckle comprises a connecting seat and a buckle locking arm, the connecting seat is detachably arranged on the mounting part, one end of the buckle locking arm is connected to the connecting seat, and the other end of the buckle locking arm extends into the abdicating groove and is supported between the motor base and the stator iron core. According to the utility model, the buckle can play a role in radial limiting and axial limiting at the same time, thereby ensuring that the stator iron core and the motor base are in close fit and do not displace, ensuring the reliability and stability of the zero angle of the motor after leaving a factory, and further making a contribution to the stable operation of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a motor stator iron core limiting mechanism. Background Art

[0002] With the continuous advancement of new energy vehicle industry policies, the current production and sales of new energy vehicles account for a growing proportion of the total production and sales of automobiles. As a power component of new energy vehicles, the reliability and stability of the drive motor system are crucial to the safe operation of new energy vehicles.

[0003] The drive motor system includes a motor and a motor controller. The motor controller reads the position signal between the motor stator and rotor provided by the rotary transformer inside the motor and cooperates with the calibrated program to accurately control the motor in response to the intention of the vehicle controller. Once the position signal between the motor stator and rotor is abnormal, the motor controller controls the motor according to the zero-position information signal solidified in its program. In this case, the vehicle controller may send a command to the motor controller to move the vehicle forward, but the motor controller controls the motor to make an erroneous and dangerous action of moving backward. One reason for the abnormal position signal between the motor stator and rotor is the displacement between the stator core and the base.

[0004] In order to prevent the displacement of the stator core and the base, the patent with the announcement number CN207117322U discloses an axial limit mechanism for the stator core of a motor, which has a limiting effect on the stator core by providing a mounting column at the end of the base and a limiting portion for abutting against the end of the stator core on the mounting column. However, this scheme can only achieve axial limit of the stator core, but cannot achieve radial limit of the stator core, so it still cannot ensure that there is no displacement between the stator core and the base. Summary of the invention

[0005] The utility model provides a motor stator core limiting mechanism, the main purpose of which is to solve the problem that the existing motor stator core axial limiting mechanism cannot achieve radial limiting of the stator core.

[0006] The utility model adopts the following technical solutions:

[0007] A motor stator core limiting mechanism comprises a motor base, a stator core and a buckle; the end of the motor base is provided with a plurality of mounting parts along the circumferential direction, and the outer wall of the stator core is provided with a plurality of clearance grooves corresponding to the mounting parts; the buckle comprises a connecting seat and a buckle locking arm, the connecting seat is detachably arranged on the mounting part, one end of the buckle locking arm is connected to the connecting seat, and the other end extends into the clearance groove and is supported between the motor base and the stator core.

[0008] Furthermore, the snap lock arm includes a lock arm body and a spring sheet; the lock arm body is connected to the connecting seat and is used to support the motor base; the two spring sheets are adjustably tilted on both sides of the lock arm body and are used to support the stator core.

[0009] Furthermore, before assembly, the distance W1 between the two spring sheets is smaller than the width W2 of the clearance groove; after assembly, the distance W1 between the two spring sheets is equal to the width W2 of the clearance groove.

[0010] Furthermore, the effective height H1 of the snap lock arm is greater than the height H2 of the clearance groove.

[0011] Furthermore, the buckle end is provided with a guide portion for facilitating insertion into the clearance groove.

[0012] Furthermore, the guide portion is a chamfered structure arranged at the end of the spring piece.

[0013] Furthermore, the connecting seat is in an L-shaped structure.

[0014] Furthermore, the connecting seat is detachably arranged on the mounting portion by means of bolts.

[0015] Furthermore, the mounting portion is a sink arranged at the end of the motor base.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The buckle in the utility model can play the role of radial limitation and axial limitation at the same time, thereby ensuring that the stator core and the motor base are tightly matched and do not shift, ensuring the reliability and stability of the zero angle of the motor when it leaves the factory, and thus contributing to the stable operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is an exploded schematic diagram of the utility model.

[0020] Figure 3 It is a three-dimensional diagram of the buckle in the utility model.

[0021] Figure 4 for Figure 3 Bottom view of the center buckle.

[0022] Figure 5 It is a structural schematic diagram of the stator core in the utility model.

[0023] Figure 6 A cross-sectional schematic diagram of the utility model

[0024] In the figure: 1-motor base; 11-installation part; 2-stator core; 21-gap groove; 3-clip; 31-connecting seat; 32-clip lock arm; 321-locking arm body; 322-spring; 323-guide part; 33-bolt. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0026] like Figures 1 to 3 As shown, the utility model discloses a limiting mechanism for a motor stator core 2, comprising a motor base 1, a stator core 2 and a buckle 3; a plurality of mounting portions 11 are provided at the end of the motor base 1 along the circumferential direction, and a plurality of clearance grooves 21 corresponding to the mounting portions 11 are provided on the outer wall of the stator core 2; the buckle 3 comprises a connecting seat 31 and a buckle locking arm 32, the connecting seat 31 is detachably arranged on the mounting portion 11, one end of the buckle locking arm 32 is connected to the connecting seat 31, and the other end extends into the clearance groove 21 and is supported between the motor base 1 and the stator core 2. Since the buckle 3 is provided with the buckle locking arm 32 supported between the motor base 1 and the clearance groove 21 of the stator core 2, it can simultaneously play the role of radial limiting and axial limiting, thereby ensuring that the stator core 2 and the motor base 1 are closely matched and do not shift, so that the actual zero position angle of the motor is always consistent with that at the time of leaving the factory.

[0027] like Figures 2 to 6 As shown, the snap lock arm 32 includes a lock arm body 321 and a spring piece 322; the lock arm body 321 is connected to the connection seat 31, and is used to support the motor base 1; two spring pieces 322 are adjustable and tilted on both sides of the lock arm body 321, and are used to support the stator core 2. Specifically, the connection seat 31 is detachably mounted on the mounting portion 11 by bolts 33. Before assembly, the distance W1 between the two spring pieces 322 is smaller than the width W2 of the clearance groove 21, and the effective height H1 of the snap lock arm 32 is larger than the height H2 of the clearance groove 21; during assembly, under the action of external force, the snap lock arm 32 can smoothly enter the clearance groove 21, and under the action of the pre-tightening force of the bolt 33, the two spring pieces 322 are deformed, so that W1 gradually increases to be equal to the width W2 of the clearance groove 21, and H1 gradually decreases to be slightly larger than the height H2 of the clearance groove 21, thereby making the snap lock arm 32 firmly clamped between the motor base 1 and the stator core 2, ensuring that the stator core 2 will not undergo radial displacement and axial displacement in the motor base 1.

[0028] like Figure 3 and Figure 4As shown, since the effective height H1 of the buckle lock arm 32 before assembly is greater than the height H2 of the clearance groove 21, a guide portion 323 is required to be provided at the end of the buckle 3 for easy insertion into the clearance groove 21. Preferably, the guide portion 323 is a chamfered structure provided at the end of the spring sheet 322.

[0029] like Figure 2 and Figure 3 As shown, preferably, the connecting seat 31 is an L-shaped structure, and the mounting portion 11 is a sinking platform arranged at the end of the motor base 1. The axial limiting effect of the buckle 3 can be further improved by the cooperation between the mounting seat of the L-shaped structure and the sinking platform, ensuring that the structure is more stable and reliable.

[0030] like Figure 1 and Figure 6 As shown, it should be noted that in this embodiment, the buckle 3 for limiting is only provided at one end of the motor base 1. In practical applications, buckles 3 can also be provided at both ends of the motor base 1 to improve the limiting effect.

[0031] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A motor stator core limiting mechanism, characterized in that: It includes a motor base, a stator core and a clip; the end of the motor base is provided with a plurality of mounting parts along the circumferential direction, and the outer wall of the stator core is provided with a plurality of clearance grooves corresponding to the mounting parts; the clip includes a connecting seat and a clip locking arm, the connecting seat is detachably arranged on the mounting part, one end of the clip locking arm is connected to the connecting seat, and the other end extends into the clearance groove and is held between the motor base and the stator core.

2. A motor stator core limiting mechanism as claimed in claim 1, characterized in that: The snap lock arm includes a lock arm body and a spring piece; the lock arm body is connected to the connecting seat and is used to support the motor base; the two spring pieces are adjustably tilted and arranged on both sides of the lock arm body and are used to support the stator core.

3. A motor stator core limiting mechanism as claimed in claim 2, characterized in that: Before assembly, the distance W1 between the two spring sheets is smaller than the width W2 of the clearance groove; after assembly, the distance W1 between the two spring sheets is equal to the width W2 of the clearance groove.

4. A motor stator core limiting mechanism as claimed in claim 2, characterized in that: The effective height H1 of the snap lock arm is greater than the height H2 of the clearance groove.

5. The motor stator core limiting mechanism according to claim 2, characterized in that: The buckle end is provided with a guide portion for easy insertion into the clearance groove.

6. A motor stator core limiting mechanism as claimed in claim 5, characterized in that: The guide portion is a chamfered structure arranged at the end of the spring sheet.

7. The motor stator core limiting mechanism according to claim 1, characterized in that: The connecting seat is in an L-shaped structure.

8. The motor stator core limiting mechanism according to claim 1, characterized in that: The connecting seat is detachably arranged on the mounting portion by means of bolts.

9. The motor stator core limiting mechanism according to claim 1, characterized in that: The mounting portion is a sink arranged at the end of the motor base.

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