A drive motor for an in-vehicle sunshade curtain

Abstract

This utility model discloses a car interior sunshade drive motor, including a motor housing. A stator assembly and a control board are housed within the motor housing. The stator assembly is electrically connected to the control board. A rotatable output shaft is located within the motor housing, and a rotor assembly is sleeved on the output shaft. The stator assembly is sleeved around the rotor assembly, with a clearance fit between the two. One end of the output shaft extends out of the motor housing, and the other end extends into the motor housing, also with a clearance fit. The end of the output shaft extending into the motor housing has a spherical end face. This utility model uses a brushless motor, which can effectively reduce operating noise. Furthermore, setting the output shaft to a spherical end face can effectively reduce frictional noise, while also reducing wear and extending the motor's service life.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a drive motor for a car interior sunshade. Background Technology

[0002] Car sunshades are used to block sunlight from entering through the roof of a car's windows. The structure of a sunshade includes a roller, positioning rod, two fixing brackets, a return spring, and two end plugs. Sunshades can generally be divided into ordinary sunshades and motorized sunshades.

[0003] Among them, electric sunshades are all driven by motors. The drive motors used in existing electric sunshades are mostly brushed motors. The carbon brushes inside the motor come into contact with the commutator and rub against each other, which generates a lot of noise.

[0004] On the other hand, motors sometimes experience axial thrust during operation, and the clearance between the motor output shaft and the motor housing is very small. Therefore, when there is axial thrust on the motor output shaft, friction will occur between the motor output shaft and the motor housing. However, the output shaft end face of existing motors is a flat structure, so the noise when the output shaft rubs against the motor housing is very loud. Moreover, because the friction process is a surface contact, the wear is also more severe, affecting the service life of the motor. Utility Model Content

[0005] To address some or all of the problems existing in the prior art, this utility model provides a vehicle interior sunshade drive motor, including a motor housing, a stator assembly and a control board inside the motor housing, the stator assembly being electrically connected to the control board, a rotatable output shaft inside the motor housing, a rotor assembly sleeved on the output shaft, the stator assembly being sleeved around the rotor assembly with a clearance fit between the two; one end of the output shaft extends out of the motor housing, and the other end of the output shaft extends into the motor housing with a clearance fit, the end of the output shaft extending into the motor housing having a spherical end face.

[0006] As a further improvement of this utility model, a receiving groove is provided inside the motor housing at a position corresponding to the output shaft, and a wear-resistant gasket is provided inside the receiving groove.

[0007] As a further improvement of this utility model, a first bearing is provided in the receiving groove, the first bearing is connected to the output shaft, a second bearing is sleeved on the output shaft, and the second bearing is connected to the motor housing.

[0008] As a further improvement of this utility model, the receiving groove is provided with an elastic glass sheet, which abuts against the first bearing and the wear-resistant pad respectively.

[0009] As a further improvement of this utility model, the wear-resistant pad is made of manganese steel.

[0010] As a further improvement of this utility model, the stator assembly includes a wire frame connected to the motor housing. The wire frame is provided with a stator core and an induction coil. The induction coil is wound around the periphery of the stator core and is electrically connected to the control board.

[0011] As a further improvement of this utility model, the rotor assembly includes a rotor core, which is sleeved around the output shaft. A magnetic ring is sleeved around the rotor core, and the magnetic ring is in clearance fit with the stator core and the induction coil.

[0012] As a further improvement of this utility model, the control board is provided with a cable that extends into the motor housing.

[0013] As a further improvement of this utility model, the motor housing is provided with a flexible wire clamp, the flexible wire clamp is connected to the cable, and the cable passes through the flexible wire clamp and extends out of the motor housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a brushless motor to replace the existing brushed motor as the drive motor for the electric sunshade, which can effectively reduce the noise generated during operation. In addition, the end of the output shaft that extends into the motor housing is set as a spherical end face, so that the output shaft can only make point contact with the motor housing due to axial thrust, which can effectively reduce friction noise, reduce wear, and improve the service life of the motor. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this utility model;

[0019] Figure 3 This is an exploded structural diagram of an embodiment of the present invention. Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0021] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, a car interior sunshade drive motor includes a motor housing 1, a stator assembly and a control board 2 fixedly installed inside the motor housing 1, the stator assembly and the control board 2 being electrically connected, and a rotatable output shaft 3 installed inside the motor housing 1. A rotor assembly is sleeved on the output shaft 3, and the stator assembly is sleeved around the rotor assembly with a clearance fit. One end of the output shaft 3 extends out of the motor housing 1, and the other end of the output shaft 3 extends into the motor housing 1 with a clearance fit. The end of the output shaft 3 extending into the motor housing 1 is a spherical end face 31. When the car interior sunshade drive motor is working, the control board 2 supplies power to the stator assembly. After the stator assembly is energized, it drives the rotor assembly to rotate, which in turn drives the output shaft 3 to rotate, thereby realizing the function of driving the car interior sunshade to open or close. Using a brushless motor instead of a brushed motor can reduce the noise generated during motor operation. In addition, by setting the end of the output shaft 3 that extends into the motor housing as a spherical end face 31, the output shaft 3 can only make point contact with the motor housing 1 due to axial thrust, which can effectively reduce friction noise, reduce wear, and extend the service life of the motor.

[0024] The stator assembly includes a wire frame 4, which is fixedly installed inside the motor housing 1. A stator core 5 and an induction coil (not shown in the figure) are mounted on the wire frame 4. The induction coil is wound around the stator core 5 and is electrically connected to the control board 2. The rotor assembly includes a rotor core 6, which is sleeved around the output shaft 3. A magnetic ring 7, a permanent magnet, is sleeved around the rotor core 6 and has a clearance fit with the stator core 5 and the induction coil. During operation, the control board 2 energizes the induction coil, causing the stator core 5 to become magnetic. Under the action of the magnetic force, the magnetic ring 7 rotates, driving the rotor core 6 and the output shaft 3 to rotate, thus opening or closing the sunshade.

[0025] For ease of control and power supply, a cable 8 is soldered onto the control board 2, extending out of the motor housing 1. The cable 8 includes power and signal lines, allowing for power supply and control of the motor via an external power source or controller. Specifically, a flexible cable clamp 9, made of silicone material, is installed on the motor housing 1. The flexible cable clamp 9 is fixedly connected to the cable 8, with the cable 8 passing through it and extending out of the motor housing 1. The flexible cable clamp 9 secures the cable 8, preventing it from being pulled during use and improving structural stability.

[0026] To further reduce wear, a receiving groove 10 is provided inside the motor housing 1 at a position corresponding to the output shaft 3, and a wear-resistant shim 11 is fixedly installed inside the receiving groove 10. By providing the wear-resistant shim 11, when there is axial thrust on the output shaft 3, the output shaft 3 can only rub against the wear-resistant shim 11 and will not directly contact the motor housing 1. The wear-resistant shim 11 has good wear resistance and can further extend the service life of the motor.

[0027] In this embodiment, the wear-resistant pad 11 is made of manganese steel; in other embodiments, the wear-resistant pad 11 may also be made of other wear-resistant materials.

[0028] A first bearing 12 is provided in the receiving groove 10. The first bearing 12 is sleeved on the periphery of the output shaft 3. A second bearing 13 is also sleeved on the output shaft 3. The second bearing 13 is fixedly connected to the motor housing 1. The first bearing 12 and the second bearing 13 can fix the output shaft 3 in the motor housing 1, thereby ensuring that the output shaft 3 can rotate freely in the motor housing 1.

[0029] To facilitate the fixing of the wear-resistant pad 11, an elastic glass sheet 14 is installed in the receiving groove 10. The elastic glass sheet 14 abuts against the first bearing 12 and the wear-resistant pad 11 respectively. The elastic glass sheet 14 can limit and fix the wear-resistant pad 11 in the receiving groove 10, preventing displacement during operation and improving the stability of the structure. On the other hand, the elastic glass sheet 14 can also provide a buffer force for the axial displacement of the output shaft 3, ensuring the stability of the structure.

[0030] When in use, if there is axial thrust on the output shaft 3, the output shaft 3 will drive the first bearing 12 to undergo a certain axial displacement, thereby compressing the elastic glass sheet 14, and the end face of the output shaft 3 will slide and rub against the wear-resistant pad 11. Of course, in actual use, the output shaft 3 may not drive the first bearing 12 to move axially synchronously, but the output shaft 3 will undergo axial displacement relative to the first bearing 12. At this time, the spherical end face 31 of the output shaft 3 will still slide and rub against the wear-resistant pad 11.

[0031] The brushless motor used in this vehicle interior sunshade drive motor reduces operating noise. The spherical end face of the output shaft 3 reduces friction between the output shaft 3 and external objects, thus reducing wear and extending service life. Furthermore, by installing wear-resistant shims 11 inside the motor housing 1, the axial displacement of the output shaft 3 is limited to friction with the wear-resistant shims 11, preventing wear on the motor housing 1 and further extending the motor's lifespan. Actual measurements show that the service life of this vehicle interior sunshade drive motor is more than 10 times longer than that of existing brushed motors.

[0032] The above-described specific embodiments are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A drive motor for a vehicle interior sunshade, characterized in that: The device includes a motor housing, within which a stator assembly and a control board are provided. The stator assembly is electrically connected to the control board. A rotatable output shaft is provided within the motor housing, on which a rotor assembly is sleeved. The stator assembly is sleeved around the rotor assembly, and the two are fitted with a clearance fit. One end of the output shaft extends out of the motor housing, and the other end of the output shaft extends into the motor housing and is clearance-fitted with the motor housing. The end of the output shaft extending into the motor housing has a spherical end face.

2. The in-vehicle sunshade drive motor according to claim 1, characterized in that: The motor housing is provided with a receiving groove at a position corresponding to the output shaft, and a wear-resistant gasket is provided in the receiving groove.

3. The in-vehicle sunshade drive motor according to claim 2, characterized in that: The receiving groove is provided with a first bearing, which is connected to the output shaft. A second bearing is sleeved on the output shaft and is connected to the motor housing.

4. The in-vehicle sunshade drive motor according to claim 3, characterized in that: The receiving groove is provided with an elastic glass sheet, which abuts against the first bearing and the wear-resistant pad respectively.

5. The in-vehicle sunshade drive motor according to claim 2, characterized in that: The wear-resistant pad is made of manganese steel.

6. The vehicle interior sunshade drive motor according to any one of claims 1-5, characterized in that: The stator assembly includes a wire frame connected to the motor housing. The wire frame is provided with a stator core and an induction coil. The induction coil is wound around the periphery of the stator core and is electrically connected to the control board.

7. The in-vehicle sunshade drive motor according to claim 6, characterized in that: The rotor assembly includes a rotor core, which is sleeved around the output shaft. A magnetic ring is sleeved around the rotor core, and the magnetic ring is in clearance fit with the stator core and the induction coil.

8. The in-vehicle sunshade drive motor according to claim 1, characterized in that: The control board is equipped with cables that extend into the motor housing.

9. The in-vehicle sunshade drive motor according to claim 8, characterized in that: The motor housing is provided with a flexible wire clamp, which is connected to the cable. The cable passes through the flexible wire clamp and extends out of the motor housing.

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