Steering motor capable of ensuring zero deflection angle

Abstract

The utility model discloses a steering motor capable of ensuring a zero deflection angle. The steering motor comprises a housing; a positioning groove is formed in the outer wall of the stator assembly, and the stator assembly is inserted into the machine shell according to a required angle; the end cover assembly is mounted at the opening end of the machine shell; the rotating shaft is rotatably installed at the closed ends of the end cover assembly and the machine shell, and a center hole and a first positioning hole are formed in the end face of the rotating shaft; the rotor cores are provided with second positioning holes, the rotor cores sleeve the rotating shaft, and the second positioning holes are collinear with the first positioning holes and the central hole; an inserting rod is inserted into an inner ring hole of the signal magnetic ring, a positioning notch is formed in the end of the inserting rod, one end of the inserting rod is inserted into the inner ring hole of the signal magnetic ring, the other end of the inserting rod is inserted into a center hole in one end of the rotating shaft, and a preset angle is formed between the connecting line of the circle center of the first positioning hole and the circle center of the center hole and the inner wall of the positioning notch. According to the utility model, the problem that the requirement of a customer on the zero deflection angle of the motor cannot be ensured when the existing motor structure is assembled is solved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a steering motor that can guarantee a zero-position deflection angle. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. A brushless DC motor typically consists of a stator, rotor, housing, end covers, and bearings.

[0003] The motor zero-position deflection angle refers to the angle between the zero position of the motor position sensor and the actual zero position, often called the resolver zero-position deflection angle or initial angle. In motor control systems, the motor zero-position deflection angle has a significant impact on the accuracy of the motor's output torque. Existing motor structures cannot guarantee the customer's requirements for the motor zero-position deflection angle (the angle between the back EMF curve and the magnetic ring signal curve) during assembly.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a steering motor that can guarantee a zero-position deflection angle is provided to solve the problem that existing motor structures cannot guarantee the customer's requirements for the zero-position deflection angle during assembly.

[0006] To achieve the above objectives, a steering motor capable of guaranteeing a zero-position deflection angle is provided, comprising:

[0007] A housing having an open end and a closed end;

[0008] A stator assembly, wherein a positioning groove is formed on the outer wall of the stator assembly, and the stator assembly is inserted into the housing at a required angle;

[0009] End cap assembly, installed at the open end of the housing;

[0010] A rotating shaft is rotatably mounted on the closed end of the end cap assembly and the housing. The end face of the rotating shaft has a central hole and an eccentrically positioned first positioning hole.

[0011] The rotor core has multiple segments, each with an eccentrically positioned second positioning hole. The multiple segments are fitted onto the rotating shaft, and the second positioning hole is collinear with the first positioning hole and the center hole.

[0012] A signal magnetic ring has a connector rod inserted into its inner ring hole. The end of the connector rod forms a positioning notch. One end of the connector rod is inserted into the inner ring hole of the signal magnetic ring, and the other end of the connector rod is inserted into the center hole of one end of the rotating shaft. The line connecting the center of the first positioning hole and the center of the center hole is set at a preset angle with the inner wall of the positioning notch.

[0013] Furthermore, a coupling is fitted onto the other end of the rotating shaft.

[0014] Furthermore, the end cap assembly is detachably mounted to the opening end of the housing.

[0015] Furthermore, the positioning groove is a through groove.

[0016] The beneficial effect of this invention is that the steering motor of this invention, which can guarantee a zero-position deflection angle, ensures that the angle between the U-phase back EMF waveform of the motor assembly and the U-phase signal waveform of the signal magnetic ring meets the client's requirements for the zero-position deflection angle. After mechanical positioning and assembly via positioning grooves, first positioning holes, and second positioning holes, the steering motor of this invention eliminates the need for zero-position deflection angle calibration, simplifying the ECU control program. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a steering motor that can guarantee a zero-position deflection angle according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the stator assembly according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the rotor core structure according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the signal magnetic ring according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the coupling according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the closed end of the housing according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the stator housing sub-assembly according to an embodiment of the present invention. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Reference Figures 1 to 7 As shown, this utility model provides a steering motor that can guarantee zero-position deflection angle, including: housing 1, stator assembly 2, end cover assembly 3, rotating shaft 4, rotor core 5, and signal magnetic ring 6.

[0028] In this embodiment, the housing 1 is cylindrical. The housing 1 has an open end and a closed end.

[0029] The stator assembly 2 is annular. The outer diameter of the stator assembly is adapted to the inner diameter of the housing. A positioning groove 20 is formed on the outer wall of the stator assembly 2. The positioning groove 20 is arranged along the axial direction of the stator assembly. The stator assembly 2 is inserted into the housing 1 at the required angle.

[0030] During stator assembly assembly, the angle between the line connecting the locating groove 20 of the stator assembly to the center of the stator assembly and the line connecting the housing mounting hole to the center of the housing is 15.3°. (Reference) Figure 7 The illustration.

[0031] As a preferred implementation, the positioning groove is a through groove.

[0032] The end cap assembly 3 is installed at the open end of the housing 1.

[0033] The rotating shaft 4 is rotatably mounted on the closed ends of the end cap assembly 3 and the housing 1. Correspondingly, the closed ends of the end cap assembly and the housing are respectively provided with shaft holes. Both ends of the rotating shaft are rotatably inserted into the shaft holes.

[0034] In this embodiment, the end cap assembly 3 is detachably mounted on the open end of the housing 1.

[0035] The end face of the rotating shaft 4 has a central hole and an eccentrically positioned first positioning hole 40. The central hole is coaxial with the rotating shaft.

[0036] The rotor core 5 consists of multiple segments. These segments are coaxially arranged. The inner annular hole of the rotor core is adapted to the outer diameter of the shaft. Each rotor core 5 has an eccentrically positioned second positioning hole 50. The multiple rotor core segments 5 are fitted onto the shaft 4. The second positioning hole 50 is collinear with the first positioning hole 40 and the center hole.

[0037] The signal magnetic ring 6 is annular. In this embodiment, the signal magnetic ring, the shaft core, the stator assembly, and the housing are coaxially arranged. A connector 61 is inserted into the inner annular hole of the signal magnetic ring 6. A positioning notch 610 is formed at the end of the connector 61. One end of the connector 61 is inserted into the inner annular hole of the signal magnetic ring 6. The other end of the connector 61 is inserted into the center hole at one end of the shaft 4. The line connecting the center of the first positioning hole 40 and the center of the center hole is set at a preset angle to the inner wall 611 of the positioning notch 610.

[0038] In this embodiment, a coupling 7 is fitted onto the other end of the rotating shaft 4.

[0039] When assembling the steering motor of this invention that can guarantee a zero-position deflection angle, first, the stator assembly with positioning grooves is installed into the housing at the required angle, completing the assembly of the stator housing sub-assembly. Next, the shaft with the first positioning hole is sequentially pressed into the inner ring holes of multiple rotor core segments (rotor core assemblies) with second positioning holes. While ensuring the polarity position of the magnets, the angle between the extension line connecting the center of the shaft's center hole and the center of the first positioning hole and the middle section of the rotor core is maintained. Then, the end cover assembly is assembled onto the shaft, completing the assembly of the rotor end cover sub-assembly. Finally, the assembled rotor end cover sub-assembly is joined with the stator housing sub-assembly to form the motor sub-assembly.

[0040] Positioning is achieved using the first positioning hole on the shaft. A claw coupling with circumferentially distributed positioning teeth is then assembled to the other end of the shaft at the required angle. Positioning is then achieved using the positioning teeth of the coupling. A signal magnetic ring with positioning notches is then assembled into the center hole of the shaft at the required angle, forming the motor assembly.

[0041] After assembly in this manner, the steering motor of this invention, which guarantees a zero-position deflection angle, ensures that the angle between the U-phase back EMF waveform of the motor assembly and the U-phase signal waveform of the signal magnetic ring meets the client's requirements for the zero-position deflection angle. After mechanical positioning assembly via positioning slots, first positioning holes, and second positioning holes, the steering motor of this invention eliminates the need for zero-position deflection angle calibration, simplifying the ECU (Electronic Control Unit) control program.

[0042] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A steering motor capable of guaranteeing zero position angle, characterized in that, The application relates to a motor, which comprises the following parts: a casing with an open end and a closed end; a stator assembly, the outer wall of which forms a positioning groove, the stator assembly being inserted into the casing at a required angle; an end cover assembly installed on the open end of the casing; a rotating shaft rotatably installed on the end cover assembly and the closed end of the casing, the end surface of the rotating shaft being provided with a central hole and a first positioning hole eccentrically arranged; a multi-section rotor core provided with a second positioning hole eccentrically arranged, the multi-section rotor core being sleeved on the rotating shaft, the second positioning hole being arranged in line with the first positioning hole and the central hole; a signal magnetic ring, an inserting rod being inserted into the inner ring hole of the signal magnetic ring, the end of the inserting rod being provided with a positioning notch, one end of the inserting rod being inserted into the inner ring hole of the signal magnetic ring, the other end of the inserting rod being inserted into the central hole of one end of the rotating shaft, the connecting line of the center of the first positioning hole and the center of the central hole being arranged at a preset angle with the inner wall of the positioning notch.

2. The steering motor capable of guaranteeing zero-position angle bias according to claim 1, characterized in that, the other end of the rotating shaft is sleeved with a shaft coupling.

3. The steering motor capable of guaranteeing zero-position angle bias according to claim 1, characterized in that, the end cover assembly is detachably installed on the open end of the casing.

4. The steering motor capable of securing a zero-position angle according to claim 1, characterized in that, the positioning groove is a through groove.

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