Multi-circle magnetic encoder and tubular motor using same

Abstract

The utility model provides a multi-circle magnetic encoder and a tubular motor using the same. The multi-turn magnetic encoder comprises: a cover body (11); the input tooth part (2), the first counting module (3), the transmission tooth part (4) and the second counting module (5) are installed on the cover body (11) and are sequentially in meshing transmission connection, and the first counting module (3) comprises a first gear (31) and a first magnet (32) synchronously rotating along with the first gear (31); the second counting module (5) comprises a second gear (51) and a second magnet (52) synchronously rotating along with the second gear (51); and a first magnetic induction chip (6) and a second magnetic induction chip (7), the first magnetic induction chip (6) is arranged corresponding to the first magnet (32), and the second magnetic induction chip (7) is arranged corresponding to the second magnet (52), so that rotation counting is carried out by inducing magnetic field changes. The positioning device has the advantages of accurate and reliable positioning, compact structural design, low cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of tubular motor technology, and in particular to a multi-turn magnetic encoder and a tubular motor using the same. Background Technology

[0002] Tubular motors are commonly used in electric roller shutters. The motor is concealed within the roller tube; its rotation drives the drive shaft, raising and lowering the shutter slats. When rising, the slats wind around the roller, and when descending, they slide down the inner side of the guide rails. The raising, stopping, and lowering of the shutters are controlled via a remote control.

[0003] Chinese patent CN207069828U discloses a tubular motor controller with position memory function. The encoder is primarily used to memorize the position of the components driven by the tubular motor, allowing the processor to control the motor according to user operations. The reducer drives the encoder and ensures it has a reasonable rotation angle, improving encoder accuracy. A travel limit switch communicates with both the encoder and the processor. The encoder sends a position signal to the travel limit switch, which transmits the signal to the processor. This allows the controller to limit the travel of the tubular motor, preventing damage to components driven by the motor from overshooting its designated position and improving control accuracy.

[0004] However, in existing technical solutions, it is usually impossible to read the current position when the power is off, and the running stroke is recalculated when the power is restored. In addition, the lead screw mechanical limit structure commonly used in existing technologies cannot obtain the rotation state of the main chip and cannot record the current position. It can only perform instantaneous mechanical limit when the end point is reached to stop the continued movement, resulting in poor stroke termination smoothness. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-turn magnetic encoder and a tubular motor using it. By setting up a multi-turn absolute encoder and a magnetic induction structure in the counting module, the current running position can be recorded in real time. In particular, it can accurately record the specific travel distance of the drive component during abnormal power failure, thereby accurately controlling the remaining running distance after restarting. It has high position detection accuracy and is safe and reliable. It solves the technical problems in existing technologies, such as the inability to read the current position when power is off, the need to recalculate the running distance when power is restored, and the poor smoothness of mechanical limit travel termination.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-turn magnetic encoder includes: a cover; an input gear portion, a first counting module, a transmission gear portion, and a second counting module mounted on the cover and sequentially meshed and connected, wherein the first counting module includes a first gear and a first magnet that rotates synchronously with the first gear, and the second counting module includes a second gear and a second magnet that rotates synchronously with the second gear; and a first magnetic induction chip and a second magnetic induction chip, wherein the first magnetic induction chip is disposed corresponding to the first magnet, and the second magnetic induction chip is disposed corresponding to the second magnet, thereby performing rotation counting by sensing changes in the magnetic field.

[0008] Preferably, the first gear has a first mounting groove at its center, and the first magnet is coaxially mounted in the first mounting groove; the second gear has a second mounting groove at its center, and the second magnet is coaxially mounted in the second mounting groove.

[0009] Preferably, the input gear meshes with the first gear, the first gear meshes with the transmission gear, and the transmission gear meshes with the second gear.

[0010] Preferably, the first magnetic induction chip is located at the axial end of the first gear, and the second magnetic induction chip is located at the axial end of the second gear.

[0011] Preferably, the system also includes a base on which both the first magnetic induction chip and the second magnetic induction chip are mounted.

[0012] Preferably, the base is also provided with a main chip that is signal-connected to the first magnetic induction chip and the second magnetic induction chip.

[0013] Preferably, the base is mounted on the bottom surface of the cover, and there is an installation space between them to accommodate the first magnetic induction chip, the second magnetic induction chip, and the main chip.

[0014] Preferably, the input tooth portion, the first counting module, the transmission tooth portion, and the second counting module are distributed and installed on the top surface of the cover, and the cover also includes a shell covering the cover.

[0015] Preferably, the input tooth portion is engaged and driven by the first counting module, the transmission tooth portion is engaged and driven by the first counting module, and the second counting module is engaged and driven by the transmission tooth portion.

[0016] This utility model also provides a tubular motor, including: a drive gear ring and a transmission gear module; and a multi-turn magnetic encoder as described above, wherein the input end of the transmission gear module is meshed and connected to the drive gear ring, and the output end of the transmission gear module is meshed and connected to the input gear portion.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) This utility model sets up a multi-turn absolute encoder, and realizes real-time recording of the current running position through the magnetic structure formed by the rotation of gears, magnets and magnetic induction chips in the counting module. When there is an abnormal power failure, it records the specific height position of the controlled roller shutter, thereby accurately controlling the remaining running distance after restarting. The position detection accuracy is high, it is safe and reliable, and extends the service life.

[0019] (2) The tubular motor of this utility model has high-precision stroke limit. By adopting intelligent electronic limit device, the current position can be recorded in real time, so that feedback can be given before reaching the end position of the stroke. This can be combined with the deceleration module to achieve early deceleration, achieve smooth arrival at the end position, improve the stability of operation, and realize the smooth lifting and lowering action of the roller shutter.

[0020] (3) The tubular motor of this utility model can intelligently control the multi-turn absolute encoder through APP or remote control to achieve intelligent and precise adjustment of the opening and closing degree of the curtain. At the same time, various wireless communication functions can be set on the tubular motor to facilitate integration with the smart home system.

[0021] In summary, this utility model has the advantages of accurate and reliable positioning, compact structural design, and low cost. In particular, it has a particularly outstanding advantage in the smooth and precise control of the lifting stroke of the roller shutter after a power outage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the multi-turn magnetic encoder in this utility model;

[0023] Figure 2 This is a schematic diagram of the main structure of the multi-turn magnetic encoder in this utility model. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the main structure of the multi-turn magnetic encoder in this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the main structure of the multi-turn magnetic encoder in this utility model. Figure 3 ;

[0026] Figure 5 This is a schematic diagram of the overall structure of the tubular motor in this utility model;

[0027] Figure 6 This is a schematic diagram of the installation of the multi-turn magnetic encoder in a tubular motor according to this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Example 1

[0031] like Figure 2 As shown, a multi-turn magnetic encoder includes: a cover 11; an input gear portion 2, a first counting module 3, a transmission gear portion 4, and a second counting module 5, which are installed on the cover 11 and sequentially meshed and connected. The first counting module 3 includes a first gear 31 and a first magnet 32 ​​that rotates synchronously with the first gear 31. The second counting module 5 includes a second gear 51 and a second magnet 52 that rotates synchronously with the second gear 51. It also includes a first magnetic induction chip 6 and a second magnetic induction chip 7, where the first magnetic induction chip 6 is positioned corresponding to the first magnet 32, and the second magnetic induction chip 7 is positioned corresponding to the second magnet 52, thereby counting rotations by sensing changes in the magnetic field.

[0032] In this embodiment, a multi-turn absolute encoder is used. The rotation of the gear in each counting module drives the magnet to rotate synchronously. The change in the magnetic field generated is detected and acquired by the corresponding magnetic induction chip, so that the current running position can be recorded in real time. When applied to the roller shutter door control scenario, the specific height position of the controlled roller shutter is recorded in the event of an abnormal power failure, so as to accurately control the remaining running distance for restarting. By setting two sets of NS magnets, the position detection accuracy is high, it is safe and reliable, and the service life is extended.

[0033] Furthermore, it is worth noting that, due to the use of electronic limiters, the current position can be recorded in real time, thus providing feedback before reaching the end of the travel path. This, in conjunction with the deceleration module, enables early deceleration, ensuring a smooth arrival at the end position, improving the stability of operation, and achieving smooth lifting and lowering of the roller shutter, avoiding the sudden braking and rapid stopping of traditional mechanical limiters.

[0034] As a preferred option, such as Figure 4 As shown, the first gear 31 has a first mounting groove 33 at its center, and the first magnet 32 ​​is coaxially mounted in the first mounting groove 33. The second gear 51 has a second mounting groove 53 at its center, and the second magnet 52 is coaxially mounted in the second mounting groove 53. The structure is stable.

[0035] Preferably, the input gear portion 2 meshes with the first gear 31, the first gear 31 meshes with the transmission gear portion 4, and the transmission gear portion 4 meshes with the second gear 51.

[0036] As a preferred option, such as Figure 2-3 As shown, the first magnetic induction chip 6 is located at the axial end of the first gear 31, and the second magnetic induction chip 7 is located at the axial end of the second gear 51, resulting in high detection sensitivity and accuracy.

[0037] As a preferred option, such as Figure 1 As shown, it also includes: a base 12, on which the first magnetic induction chip 6 and the second magnetic induction chip 7 are both mounted.

[0038] As a preferred option, such as Figure 3 As shown, the base 12 is also provided with a main chip 8 that is signal-connected to the first magnetic induction chip 6 and the second magnetic induction chip 7.

[0039] Preferably, the base 12 is mounted on the bottom surface of the cover 11 and there is an installation space between them to accommodate the first magnetic induction chip 6, the second magnetic induction chip 7 and the main chip 8.

[0040] Preferably, the input tooth portion 2, the first counting module 3, the transmission tooth portion 4, and the second counting module 5 are distributed and installed on the top surface of the cover 11, and the cover 11 is also covered by a housing 13.

[0041] The multi-turn magnetic encoder in this embodiment has a compact overall structure and a reasonable layout.

[0042] Preferably, the input tooth portion 2 is meshed and driven by the first counting module 3, the transmission tooth portion 4 is meshed and driven by the first counting module 3, and the second counting module 5 is driven and meshed by the transmission tooth portion 4.

[0043] It is worth noting that this embodiment can also read the current value and record the position of the tubular motor even in a power outage scenario where it is manually cranked.

[0044] Example 2

[0045] The components in this embodiment that are the same as or corresponding to those in the above embodiments are referred to by the same reference numerals as those in the above embodiments. For the sake of simplicity, only the differences between this embodiment and the above embodiments are described below. The difference between this embodiment and the above embodiments is that:

[0046] like Figure 5 A tubular motor is shown, such as Figure 6 As shown, it includes: a drive gear ring 91 and a transmission gear module 92; and a multi-turn magnetic encoder as described in the above embodiment, wherein the input end of the transmission gear module 92 is meshed and connected to the drive gear ring 91, and the output end of the transmission gear module 92 is meshed and connected to the input gear part 2.

[0047] When the motor is working, it drives the gear ring 91 to rotate. The power is transmitted to the gear ring 91 meshing with it through the transmission gear module 92. Through the meshing transmission of each stage, the first magnet 32 ​​and the second magnet 52 of the first counting module 3 and the second counting module 5 are driven to generate magnetic field changes. The first magnetic induction chip 6 and the second magnetic induction chip 7 respectively obtain the magnetic field change information and feed back the rotation number signal to the main chip 8, thereby recording the current position and controlling the number of rotations of the motor according to the rotation number signal, thereby driving the roller shutter to rise and fall to a specific height.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-turn magnetic encoder, characterized in that, include: Cover (11); The following components are installed on the cover (11) and sequentially meshed and connected: an input gear portion (2), a first counting module (3), a transmission gear portion (4), and a second counting module (5). The first counting module (3) includes a first gear (31) and a first magnet (32) that rotates synchronously with the first gear (31). The second counting module (5) includes a second gear (51) and a second magnet (52) that rotates synchronously with the second gear (51). The first magnetic induction chip (6) and the second magnetic induction chip (7) are configured to correspond to the first magnet (32) and the second magnetic induction chip (7) is configured to correspond to the second magnet (52), thereby performing rotation counting by sensing changes in the magnetic field.

2. A multi-turn magnetic encoder according to claim 1, characterized in that, The first gear (31) has a first mounting groove (33) at its center, and the first magnet (32) is coaxially mounted in the first mounting groove (33). The second gear (51) has a second mounting groove (53) at its center, and the second magnet (52) is coaxially mounted in the second mounting groove (53).

3. A multi-turn magnetic encoder according to claim 1, characterized in that, The input gear part (2) meshes with the first gear (31), the first gear (31) meshes with the transmission gear part (4), and the transmission gear part (4) meshes with the second gear (51).

4. A multi-turn magnetic encoder according to claim 1, characterized in that, The first magnetic induction chip (6) is located at the axial end of the first gear (31), and the second magnetic induction chip (7) is located at the axial end of the second gear (51).

5. A multi-turn magnetic encoder according to claim 1, characterized in that, Also includes: The base (12) is on which the first magnetic induction chip (6) and the second magnetic induction chip (7) are mounted.

6. A multi-turn magnetic encoder according to claim 5, characterized in that, The base (12) is also provided with a main chip (8) that is signal-connected to the first magnetic induction chip (6) and the second magnetic induction chip (7).

7. A multi-turn magnetic encoder according to claim 6, characterized in that, The base (12) is installed on the bottom surface of the cover (11) and there is an installation space between them to accommodate the first magnetic induction chip (6), the second magnetic induction chip (7) and the main chip (8).

8. A multi-turn magnetic encoder according to claim 1, characterized in that, The input tooth section (2), the first counting module (3), the transmission tooth section (4), and the second counting module (5) are distributed and installed on the top surface of the cover (11).

9. A multi-turn magnetic encoder according to claim 1, characterized in that, The input tooth part (2) is meshed and connected to the first counting module (3), the transmission tooth part (4) is meshed and connected to the first counting module (3), and the second counting module (5) is meshed and connected to the transmission tooth part (4).

10. A tubular motor, characterized in that, include: Drive gear ring (91) and transmission gear module (92); as well as In the multi-turn magnetic encoder as described in any one of claims 1-9, the input end of the transmission gear module (92) is meshed and connected to the drive gear ring (91), and the output end of the transmission gear module (92) is meshed and connected to the input gear part (2).

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