Sliding door motor with multi-pole magnetic ring structure

Abstract

The invention relates to the technical field of sliding door motors, in particular to a sliding door motor with a multi-pole magnetic ring structure, which comprises a driving motor, an output shaft and a clutch assembly used for selectively braking the output shaft, a rotating shaft of the driving motor is in power connection with the output shaft, and the clutch assembly comprises a magnetic ring and a Hall plate. The pole number of the magnetic ring is 96, the magnetic ring is made of samarium iron nitrogen, the pole number of the magnetic ring is changed from traditional 64 poles to 96 poles, an existing neodymium iron boron material is replaced by samarium iron nitrogen to serve as the material of the magnetic ring, and the advantages that the pole number of the magnetic ring is larger, and the Hall signal is stronger are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of sliding door motors, and more specifically to a sliding door motor with a multi-pole magnetic ring structure. Background Art

[0002] The sliding door motor is the driving device of the vehicle's side sliding door. When the sliding door motor is activated, the side sliding door slides along the vehicle body track and opens or closes the rear passenger compartment.

[0003] In order to achieve the braking of the output shaft, the existing sliding door motor will be equipped with a clutch assembly on the sliding door motor. The clutch assembly includes a magnetic ring and a Hall plate. The Hall plate is used to identify the change of the positive and negative poles of the magnetic ring and provide timely feedback. However, as the degree of intelligence of vehicles is getting higher and higher, the anti-pinch function of the side sliding door is gradually popularizing, and the requirements for the real-time position feedback of the output shaft are getting higher and higher. The number of magnetic poles of the existing magnetic ring is mostly 64, and the material of the magnetic ring is neodymium iron boron. This results in the Hall plate receiving less magnetic ring signals in actual use, and it is difficult to accurately reflect the real-time rotation position of the motor output shaft; in addition, the output shaft rotates by 5.625 degrees at each step of the electrical signal. When the Hall plate sends a stop signal, the output shaft may have only rotated the first degree of 5.625 degrees, and will still rotate the subsequent 4.625 degrees, increasing the risk of pinching people.

[0004] Therefore, there is a demand for a sliding door motor with a multi-pole magnetic ring structure, which has more magnetic ring poles, stronger Hall signals, and can provide timely warning when the brake disc is severely worn. Summary of the invention

[0005] The main purpose of the present application is to provide a sliding door motor with a multi-pole magnetic ring structure, wherein the sliding door motor with a multi-pole magnetic ring structure includes a drive motor, an output shaft and a clutch assembly for selectively braking the output shaft, the rotating shaft of the drive motor is dynamically connected to the output shaft, the clutch assembly includes a magnetic ring and a Hall plate, the number of poles of the magnetic ring is 96, and the material of the magnetic ring is samarium iron nitride. By changing the number of poles of the magnetic ring from the traditional 64 poles to 96 poles, and replacing the existing neodymium iron boron material with samarium iron nitride as the material of the magnetic ring, the advantages of more magnetic ring poles and stronger Hall signals are achieved.

[0006] Another object of the present application is to provide a sliding door motor with a multi-pole magnetic ring structure, wherein the clutch assembly also includes a brake disc, a brake pad, an electromagnetic inductor and a magnetic bottom shield, and the sliding door motor with a multi-pole magnetic ring structure also includes a worm and a turbine, one end of the worm is connected to the drive motor, the turbine is sleeved on the output shaft and fixedly connected to the output shaft, the worm is meshed with the turbine, the brake pad is slidably arranged on the turbine, the electromagnetic inductor is sleeved on one end of the output shaft away from the turbine, the magnetic ring is sleeved on the electromagnetic inductor and is located on the side of the brake disc away from the brake pad, the brake disc is located between the electromagnetic inductor and the brake pad, and the magnetic bottom shield is located between the magnetic ring and the brake disc. The provision of the magnetic bottom shield helps to reduce magnetic field leakage at the bottom of the magnetic ring.

[0007] Another object of the present application is to provide a sliding door motor with a multi-pole magnetic ring structure, wherein the brake pad has a plurality of protrusions at one end close to the brake disc, and the brake disc has an annular step groove and a plurality of mounting holes, each of the mounting holes is connected to the end of the annular step groove away from the brake pad, and a pressure sensor or a displacement sensor is provided in each of the mounting holes. When the brake pad moves toward the brake disc, the protrusion extends into the annular step groove. One of the functions of the brake pad is to cooperate with the brake disc and provide braking force. Another function of the brake pad is that when the brake disc is severely worn, the protrusion will trigger the pressure sensor or the displacement sensor to provide a warning.

[0008] In order to achieve at least one of the above-mentioned invention objectives, the present application provides a sliding door motor with a multi-pole magnetic ring structure, wherein the sliding door motor with a multi-pole magnetic ring structure comprises:

[0009] a drive motor; and

[0010] an output shaft, the rotating shaft of the driving motor being in power connection with the output shaft; and

[0011] A clutch assembly for selectively braking the output shaft, the clutch assembly comprising a magnetic ring and a Hall plate, the magnetic ring has 96 poles, and the material of the magnetic ring is samarium iron nitrogen.

[0012] In one or more embodiments of the present application, the clutch assembly also includes a brake disc, a brake pad, an electromagnetic inductor and a magnetic bottom shield, the sliding door motor with a multi-pole magnetic ring structure also includes a worm and a turbine, one end of the worm is connected to the drive motor, the turbine is sleeved on the output shaft and fixedly connected to the output shaft, the worm is meshed with the turbine, the brake pad is slidably arranged on the turbine, the electromagnetic inductor is sleeved on one end of the output shaft away from the turbine, the magnetic ring is sleeved on the electromagnetic inductor and is located on the side of the brake disc away from the brake pad, the brake disc is located between the electromagnetic inductor and the brake pad, and the magnetic bottom shield is located between the magnetic ring and the brake disc.

[0013] In one or more embodiments of the present application, the brake pad has a plurality of protrusions at one end close to the brake disc, and the brake disc has an annular step groove and a plurality of mounting holes, each of the mounting holes is connected to an end of the annular step groove facing away from the brake pad, and a pressure sensor or a displacement sensor is provided in each of the mounting holes, and when the brake pad moves toward the brake disc, the protrusion extends into the annular step groove.

[0014] In one or more embodiments of the present application, the end of the brake disc facing away from the brake pad has a boss portion and an outer protrusion, and in the radial direction of the brake disc, the mounting hole is located between the boss portion and the outer protrusion, the boss portion is sleeved on the output shaft, the electromagnetic inductor is sleeved on the boss portion, the magnetic ring has a plurality of first protrusions arranged in a ring array, the outer protrusion has a plurality of second protrusions arranged in a ring array, the magnetic bottom shield is designed to imitate the second protrusions and is bonded to the outer protrusion, the magnetic ring and the magnetic bottom shield are embedded with each other, and a second protrusion is embedded between two adjacent first protrusions.

[0015] In one or more embodiments of the present application, the turbine has a plurality of guide ribs at one end close to the brake pad, the brake pad has a plurality of penetrating guide grooves, and the guide ribs pass through the guide grooves.

[0016] In one or more embodiments of the present application, the brake disc has a mounting groove at one end close to the brake pad, and the sliding door motor with a multi-pole magnetic ring structure further includes a corrugated gasket, which is placed in the mounting groove.

[0017] In one or more embodiments of the present application, the outer protrusion has a plurality of wire passing channels.

[0018] In an embodiment of the present application, a sliding door motor with a multi-pole magnetic ring structure includes a drive motor, an output shaft and a clutch assembly for selectively braking the output shaft. The rotating shaft of the drive motor is dynamically connected to the output shaft. The clutch assembly includes a magnetic ring and a Hall plate. The number of poles of the magnetic ring is 96, and the material of the magnetic ring is samarium iron nitride. By changing the number of poles of the magnetic ring from the traditional 64 to 96, and replacing the existing neodymium iron boron material with samarium iron nitride as the material of the magnetic ring, the advantages of more magnetic ring poles and stronger Hall signals are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0020] Figure 1 The figure shows a schematic structural diagram of a sliding door motor with a multi-pole magnetic ring structure of the present application;

[0021] Figure 2 The figure shows a schematic structural diagram of a sliding door motor with a multi-pole magnetic ring structure of the present application after a part of the housing is removed;

[0022] Figure 3 The figure shows a cross-sectional view of a clutch assembly of a sliding door motor with a multi-pole magnetic ring structure of the present application;

[0023] Figure 4 Pictured Figure 3 A local enlarged view of point C;

[0024] Figure 5 The figure shows an exploded view of the clutch assembly. DETAILED DESCRIPTION

[0025] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0026] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0027] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the inventive concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0028] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0029] Schematic diagram of a sliding door motor with a multi-pole magnetic ring structure, see Figures 1 to 5 According to a preferred embodiment of the present invention, a sliding door motor with a multi-pole magnetic ring structure includes a driving motor 10, an output shaft 20 and a clutch assembly 30 for selectively braking the output shaft 20.

[0030] Specifically, the rotating shaft of the drive motor 10 is dynamically connected to the output shaft 20, and the output shaft 20 is rotatably mounted on the housing of the sliding door motor with a multi-pole magnetic ring structure. The clutch assembly 30 includes a magnetic ring 301 and a Hall plate 302. The number of poles of the magnetic ring 301 is 96, and the material of the magnetic ring 301 is samarium iron nitrogen.

[0031] It should be noted that by changing the number of poles of the magnetic ring 301 from the traditional 64 poles to 96 poles, and replacing the existing neodymium iron boron material with samarium iron nitride as the material of the magnetic ring 301, referring to Table 1 and Table 2, the magnetic ring 301 signal received by the Hall plate 302 can be significantly increased.

[0032]

[0033] Table 1 5 test data of surface magnetism when the number of poles of the magnetic ring is 96 and the material is SmFeN

[0034]

[0035] Table 2 5 test data of surface magnetism when the number of poles of the magnetic ring is 96 and the material is NdFeB

[0036] It should be emphasized that when the number of poles is larger, the Hall signal that the Hall plate 302 can receive will be reduced, that is, 96 poles is a peak pole number of the magnetic ring 301 made of samarium iron nitrogen, which has the advantages of more magnetic ring poles and stronger Hall signals compared to the prior art. In addition, when the number of poles of the magnetic ring 301 is 96, the rotation angle of the output shaft 20 at each step of the electrical signal is 3.75°, which is smaller than the rotation angle of 6.625° at each step of the electrical signal in the prior art, which helps to reduce the risk of being pinched.

[0037] Furthermore, if Figure 3 and Figure 5 As shown, the clutch assembly 30 also includes a brake disc 303, a brake pad 304, an electromagnetic inductor 305 and a magnetic bottom shield 306. The sliding door motor with a multi-pole magnetic ring structure also includes a worm 40 and a turbine 50. One end of the worm 40 is connected to the drive motor 10. The turbine 50 is sleeved on the output shaft 20 and fixedly connected to the output shaft 20. The worm 40 is meshed with the turbine 50. The brake pad 304 is slidably arranged on the turbine 50. The electromagnetic inductor 305 is sleeved on one end of the output shaft 20 away from the turbine 50. The magnetic ring 301 is sleeved on the electromagnetic inductor 305 and is located on the side of the brake disc 303 away from the brake pad 304. The brake disc 303 is located between the electromagnetic inductor 305 and the brake pad 304. The magnetic bottom shield 306 is located between the magnetic ring 301 and the brake disc 303.

[0038] It should be noted that, by providing the magnetic bottom shield 306, it is helpful to reduce the magnetic field leakage at the bottom of the magnetic ring 301; in addition, when it is necessary to brake the output shaft 20, by energizing the electromagnetic inductor 305, the electromagnetic inductor 305 generates a magnetic field and applies a magnetic attraction to the brake pad 304. Under the action of the magnetic attraction, the brake pad 304 slides in the direction of the brake pad 304 and contacts the brake disc 303 at a certain moment; it should be pointed out that the brake pad 304 can only slide axially along the central axis direction of the turbine 50, and the circumferential rotation of the brake pad 304 is limited by the turbine 50, that is, the turbine 50 is During axial rotation, the brake pad 304 follows the circumferential rotation. Conversely, when the brake pad 304 stops circumferential rotation, the turbine 50 also stops circumferential rotation. When the brake pad 304 contacts the brake disc 303 and applies pressure to the brake disc 303, it should be noted that the brake pad 304 previously followed the circumferential rotation of the turbine 50, and after contacting the brake disc 303, it received a friction resistance and then gradually stopped rotating, causing the turbine 50 to stop rotating as well. Since the turbine 50 is fixedly connected to the output shaft 20, the output shaft 20 also stops rotating, thereby achieving the purpose of braking the output shaft 20.

[0039] Furthermore, since the brake disc 303 and the brake pad 304 are in surface friction during braking, after long-term use, the side of the brake disc 303 close to the brake pad 304 is seriously worn. At this time, the braking effect on the output shaft 20 is deteriorated. In order to achieve a warning when the brake disc 303 is seriously worn, so that the owner can perform timely maintenance, such as Figure 4 As shown, the brake pad 304 has a plurality of protrusions 3041 at one end close to the brake disc 303, and the brake disc 303 has an annular stepped groove 3031 and a plurality of mounting holes 3032. Each of the mounting holes 3032 is connected to an end of the annular stepped groove 3031 away from the brake pad 304. A pressure sensor 60 or a displacement sensor is provided in each of the mounting holes 3032. When the brake pad 304 moves toward the brake disc 303, the protrusion 3041 extends into the annular stepped groove 3031.

[0040] It should be noted that when the magnetic bottom shield 306 is energized and causes the brake pad 304 to move toward the brake disc 303, the protrusion 3041 extends into the annular step groove 3031. If the disc surface of the brake disc 303 is not worn or is lightly worn at this time, the protrusion 3041 is spaced a predetermined distance from the pressure sensor 60 or the displacement sensor and does not trigger the pressure sensor 60 or the displacement sensor. When the disc surface of the brake disc 303 is severely worn, when the brake pad 304 abuts against the brake disc 303, the protrusion 3041 abuts against the probe of the pressure sensor 60 or triggers the displacement sensor. At this time, the pressure sensor 60 or the displacement sensor sends a warning electrical signal to remind the owner to replace the clutch assembly 30 of the sliding door motor in time.

[0041] It is obvious that one of the functions of the brake pad 304 is to fit the brake disc 303 and provide friction resistance when the electromagnetic inductor 305 is energized, so as to provide a braking force to the turbine 50 and the output shaft 20; the second function of the brake pad 304 is to cooperate with the pressure sensor 60 or the displacement sensor to send out an alarm signal when the brake disc 303 is severely worn.

[0042] Furthermore, in order to make the internal structure of the clutch assembly 30 more compact, as shown in FIG. Figure 3 and Figure 5 As shown, the end of the brake disc 303 away from the brake pad 304 has a convex column portion 3033 and an outer convex portion 3034. In the radial direction of the brake disc 303, the mounting hole 3032 is located between the convex column portion 3033 and the outer convex portion 3034. The convex column portion 3033 is sleeved on the output shaft 20. Figure 5 As shown, the electromagnetic inductor 305 is sleeved on the convex column portion 3033, the magnetic ring 301 has a plurality of first convex teeth 3011 arranged in a ring array, the outer convex portion 3034 has a plurality of second convex teeth 3035 arranged in a ring array, the magnetic bottom shield 306 is designed in the shape of the second convex teeth 3035 and is bonded to the outer convex portion 3034 by glue, the magnetic ring 301 and the magnetic bottom shield 306 are interlocked with each other, and a second convex tooth 3035 is interlocked between two adjacent first convex teeth 3011.

[0043] Furthermore, in order to achieve that the brake pad 304 slides only along the central axis direction of the turbine 50, as shown in FIG. Figure 3 As shown, the turbine 50 has a plurality of guide ribs 501 at one end close to the brake pad 304 , and the brake pad 304 has a plurality of penetrating guide grooves 3042 , and the guide ribs 501 pass through the guide grooves 3042 .

[0044] Furthermore, in order to make the brake pad 304 and the brake disc 303 spaced apart by a predetermined distance under normal conditions, as Figure 3 As shown, the brake disc 303 has a mounting groove 3036 at one end close to the brake pad 304 , and the sliding door motor with a multi-pole magnetic ring structure further includes a corrugated gasket 307 , which is placed in the mounting groove 3036 .

[0045] Furthermore, in order to facilitate the wiring of the pressure sensor 60 or the displacement sensor, as Figure 4 As shown, the outer protrusion 3034 has a plurality of wire passages 3037 .

[0046] In summary, the sliding door motor with a multi-pole magnetic ring structure based on the embodiment of the present application is explained, which provides the sliding door motor with a multi-pole magnetic ring structure with advantages such as more magnetic ring poles, stronger Hall signals, and timely warning of severe brake disc wear.

[0047] It is worth mentioning that in the embodiment of the present application, the sliding door motor with a multi-pole magnetic ring structure has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the sliding door motor with a multi-pole magnetic ring structure provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0048] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A sliding door motor with a multi-pole magnetic ring structure, characterized in that: The sliding door motor with a multi-pole magnetic ring structure includes a drive motor; and an output shaft, the rotating shaft of the driving motor being in power connection with the output shaft; and A clutch assembly for selectively braking the output shaft, the clutch assembly comprising a magnetic ring and a Hall plate, the magnetic ring has 96 poles, and the material of the magnetic ring is samarium iron nitrogen.

2. The sliding door motor with a multi-pole magnetic ring structure according to claim 1, characterized in that: The clutch assembly also includes a brake disc, a brake pad, an electromagnetic inductor and a magnetic bottom shield. The sliding door motor with a multi-pole magnetic ring structure also includes a worm and a turbine. One end of the worm is connected to the drive motor. The turbine is sleeved on the output shaft and fixedly connected to the output shaft. The worm is meshed with the turbine. The brake pad is slidably arranged on the turbine. The electromagnetic inductor is sleeved on one end of the output shaft away from the turbine. The magnetic ring is sleeved on the electromagnetic inductor and is located on the side of the brake disc away from the brake pad. The brake disc is located between the electromagnetic inductor and the brake pad. The magnetic bottom shield is located between the magnetic ring and the brake disc.

3. The sliding door motor with a multi-pole magnetic ring structure according to claim 2, characterized in that: The brake pad has a plurality of protrusions at one end close to the brake disc, and the brake disc has an annular step groove and a plurality of mounting holes, each of the mounting holes is connected to an end of the annular step groove facing away from the brake pad, and a pressure sensor or a displacement sensor is provided in each of the mounting holes, and when the brake pad moves toward the brake disc, the protrusion extends into the annular step groove.

4. The sliding door motor with a multi-pole magnetic ring structure according to claim 3, characterized in that: The brake disc has a boss portion and an outer convex portion at one end away from the brake pad, and the mounting hole is located between the boss portion and the outer convex portion in the radial direction of the brake disc, the boss portion is sleeved on the output shaft, the electromagnetic inductor is sleeved on the boss portion, the magnetic ring has a plurality of first convex teeth arranged in a ring array, the outer convex portion has a plurality of second convex teeth arranged in a ring array, the magnetic bottom shield is designed to imitate the second convex teeth and is bonded to the outer convex portion, the magnetic ring and the magnetic bottom shield are embedded with each other, and a second convex tooth is embedded between two adjacent first convex teeth.

5. The sliding door motor with a multi-pole magnetic ring structure according to claim 4, characterized in that: The turbine has a plurality of guide ribs at one end close to the brake pad, and the brake pad has a plurality of penetrating guide grooves, and the guide ribs pass through the guide grooves.

6. The sliding door motor with a multi-pole magnetic ring structure according to claim 5, characterized in that: The brake disc has a mounting groove at one end close to the brake pad, and the sliding door motor with a multi-pole magnetic ring structure also includes a corrugated gasket, which is placed in the mounting groove.

7. The sliding door motor with a multi-pole magnetic ring structure according to claim 6, characterized in that: The outer protrusion has a plurality of wire passing channels.

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