High-torque automobile door handle actuator motor capable of being rapidly installed

Abstract

The utility model discloses a high-torque automobile door handle actuator motor capable of being rapidly installed, and the motor is characterized in that the motor comprises a square motor housing, a rotor is rotatably arranged in the motor housing, one end of the motor housing is connected with an end cover in a clamping manner, and four corners of the inner side of the motor housing are respectively provided with a neodymium iron boron magnet; an iron core of the rotor is in a six-groove shape, and two carbon brushes are arranged in the end cover at an interval of 90 degrees, by adopting the method, through the square motor shell, rapid installation and positioning are achieved, screw fastening is not needed, through cooperation of six grooves and four poles, the space of the motor shell is utilized to the maximum extent, the torque of tooth grooves is reduced, and meanwhile through the design of auxiliary grooves, the service life of the motor shell is prolonged. The cogging torque is further reduced, large torque and small cogging torque are achieved, and the use requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a high-torque automotive door handle actuator motor that can be quickly installed. Background Technology

[0002] Car door handle actuators generally require fast response, short action time, and easy installation. To achieve these requirements, not only do the sensors and control circuits need to meet the control requirements, but the performance of the DC motor as the actuator is also particularly important. That is, the motor needs to have low cogging torque and high starting torque. However, in general, the motor of a car door handle actuator is small in size, which requires maximizing the power density of the motor. How to increase the starting torque of the motor within a limited volume while maintaining low cogging torque and easy installation is a challenge faced by motor design.

[0003] To meet the starting torque requirements, the existing general solution is to use high-performance neodymium iron boron magnets to increase the power density of the motor. The housing is designed to be circular with two mounting threaded holes. However, this design requires screw tightening during installation, which does not meet the requirements for quick installation, and the motor cogging torque is difficult to optimize to the allowable range.

[0004] Therefore, there is an urgent need to design a high-torque automotive door handle actuator motor that can be quickly installed to solve one or more technical problems that are lacking in the existing technology. Summary of the Invention

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a high-torque automotive door handle actuator motor that can be quickly installed, characterized in that it includes: a square motor housing, a rotor rotatably disposed inside the motor housing, an end cap snapped onto one end of the motor housing, neodymium iron boron magnets respectively installed at the four corners of the inner side of the motor housing, the iron core of the rotor being six-slotted, and two carbon brushes spaced at 90° intervals inside the end cap.

[0006] In a preferred embodiment, the inner side of the motor housing is further provided with a mounting ring, and the four neodymium iron boron magnets are fixedly disposed on the outer side of the mounting ring at 90° intervals.

[0007] In a preferred embodiment, each core tooth of the rotor has two auxiliary slots on its surface.

[0008] The beneficial effects of this utility model are: the square motor housing enables quick installation and positioning without the need for screw fastening; the six slots and four poles maximize the use of the motor housing space and reduce the cogging torque; and the auxiliary slot design further reduces the cogging torque, achieving high torque and low cogging torque to meet usage requirements. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is an exploded view of the present invention;

[0011] Figure 3 This is a plan view of the rotor of this utility model;

[0012] Figure 4 This is a plan view of the mounting ring of this utility model;

[0013] Figure 5 This is a plan view of the end cap of this utility model.

[0014] In the picture:

[0015] 10. Motor housing; 11. Rotor; 12. Iron core teeth; 13. Rotor slot; 14. End cover; 15. Carbon brush; 16. Neodymium iron boron magnet; 17. Mounting ring; 18. Auxiliary slot. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0018] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0019] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0020] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] like Figures 1-5 As shown, this utility model provides a high-torque automotive door handle actuator motor that can be quickly installed. It is characterized by comprising: a square motor housing 10, a rotor 11 rotatably mounted inside the motor housing 10, an end cap 14 snapped onto one end of the motor housing 10, neodymium iron boron magnets 16 installed at the four corners of the inner side of the motor housing 10, the rotor 11 having a six-slot core, and two carbon brushes 15 spaced at 90° intervals inside the end cap 14.

[0022] Furthermore, the inner side of the motor housing 10 is provided with a mounting ring 17, and four neodymium iron boron magnets 16 are fixedly disposed on the outer side of the mounting ring 17 at 90° intervals.

[0023] Furthermore, each core tooth 12 of the rotor 11 has two auxiliary grooves 18 formed on its surface.

[0024] Specifically, the motor housing 10 is square, allowing for quick positioning and installation through geometric fit with the outer hub, eliminating the need for screw fastening, simplifying the installation process, meeting the assembly efficiency requirements of automotive parts, and reducing development costs. A rotor 11 rotatably houses the motor housing 10. This rotor 11 has six iron core teeth 12, with each adjacent tooth having a rotor slot 13. The six iron core teeth 12 also create six rotor slots 13. To accommodate these six slots, neodymium iron boron magnets 16 are fixed at the four corners of the inner side of the motor housing 10. The six slots and four poles alter the magnetic permeability distribution, thereby weakening the cogging torque, reducing torque pulsation, and improving low-speed stability. One end of the motor housing 10 has a snap-fit ​​end cap 14, eliminating the need for screws and allowing for quick and simple installation with just a press. The end cap 14 contains two carbon brushes 15. The magnets are distributed at 90° intervals to optimize the commutation process, reduce sparks and wear, extend motor life, and adapt to frequent start-stop conditions. To facilitate the installation and replacement of NdFeB magnets 16, an annular mounting ring 17 is provided inside the motor housing 10. The NdFeB magnets 16 are fixedly mounted on the outside of the mounting ring 17 by adhesive bonding, and adjacent NdFeB magnets 16 are distributed at 90° intervals to fit the square motor housing 10, maximize the use of stator space, and reduce magnetic leakage. When it is necessary to replace the NdFeB magnets 16, simply remove the mounting ring 17 from the motor housing 10. The operation is simple and convenient. In this embodiment, to further reduce the cogging torque, two auxiliary slots 18 are respectively opened on the surface of each iron core tooth pole 12. The auxiliary slots 18 increase the number of fundamental frequency cycles of the cogging torque, forming a phase difference with the torque generated by the original rotor slots 13, achieving a cancellation effect. Combined with the pole-slot matching of 6 slots / 4 poles (with a large least common multiple), the cogging torque is further weakened.

[0025] In summary, the square motor housing 10 enables quick installation and positioning without the need for screw fastening. The six slots and four poles maximize the use of the space in the motor housing 10 and reduce the cogging torque. Furthermore, the design of the auxiliary slot 18 further reduces the cogging torque, achieving high torque and low cogging torque to meet usage requirements.

[0026] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A high-torque automotive door handle actuator motor that can be quickly installed, characterized in that, include: The motor has a square housing, inside which a rotor is rotatably mounted. One end of the motor housing is snapped with an end cap. Neodymium iron boron magnets are installed at the four corners inside the motor housing. The rotor core is six-slotted. Two carbon brushes are arranged at 90° intervals inside the end cap.

2. The high-torque automotive door handle actuator motor that can be quickly installed according to claim 1, characterized in that, The inner side of the motor housing is also provided with a mounting ring, and the four neodymium iron boron magnets are fixedly disposed on the outer side of the mounting ring at 90° intervals.

3. The high-torque automotive door handle actuator motor that can be quickly installed according to claim 1, characterized in that, Two auxiliary slots are respectively formed on the surface of each iron core tooth pole of the rotor.

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