Flywheel module

Abstract

The application relates to the field of mechanical transmission and magnetic detection, in particular to a flywheel module, which comprises an assembling seat, a roller, a rotating magnetic attraction piece, a static magnetic attraction piece and a magnetic detection piece. The rotating magnetic attraction piece comprises a rotating seat and a first magnet. The rotating seat is provided with a containing groove, and the first magnet is embedded in the containing groove and has a magnetic pole end exposed to the groove wall. The static magnetic attraction piece comprises a fixed static seat and a second magnet. The second magnet is provided with a plurality of groove and convex parts arranged at intervals in the periphery in the circumferential direction. When the second magnet is arranged in the containing groove, the roller is rotated to drive the rotating seat to rotate, the magnetic pole end of the first magnet and the groove and the convex part are relatively rotated, the static seat is provided with the magnetic detection piece, and the magnetic detection piece is used for detecting the magnetic field strength change between the first magnet and the second magnet. The flywheel module can improve the accuracy of calculating the rotation number of the flywheel, improve the induction capacity of the magnetic field change, and effectively solve the problem that the magnetic field interference affects the inaccuracy of the magnetic field induction.

Description

Technical Field

[0001] This application relates to the fields of mechanical transmission and magnetic detection, and in particular to a flywheel module. Background Technology

[0002] In the field of computer peripherals, the mouse, as a core device for human-computer interaction, directly impacts user efficiency and experience through the performance of its scroll wheel. Traditional mouse scroll wheel technology has long been limited by issues such as mechanical wear, insufficient positioning accuracy, and limited functionality. However, the introduction of flywheel modules, especially the breakthrough in magnetic levitation flywheel technology, has brought revolutionary changes to the industry. In the industry, the calculation of the number of rotations of a magnetic levitation flywheel module is achieved through a magnetically attached scroll wheel and a corresponding magnetic induction sensor. When the flywheel starts to rotate, the scroll wheel rotates synchronously. Magnetic elements of specific strength and distribution are carefully arranged on the scroll wheel; these elements can be permanent magnets, and they create a periodically changing magnetic field during rotation. The magnetic induction sensor is installed at a fixed position near the scroll wheel, its function being to sensitively detect the changes in the magnetic field generated by the scroll wheel's rotation. As the scroll wheel rotates, the magnetic elements pass sequentially through the magnetic induction sensor, and the magnetic sensing element inside the sensor generates a corresponding change in electrical signal due to the change in magnetic field strength. These changes in electrical signals are periodic, with each complete cycle corresponding to a certain angle of scroll wheel rotation. By counting and analyzing these periodic electrical signals, and combining this with the transmission ratio between the roller and the flywheel, the number of flywheel rotations can be accurately calculated. However, existing methods for magnetic rollers still have significant drawbacks in practical applications. In actual industrial or usage environments, there are often various types of magnetic field sources with varying intensities. These external magnetic field sources superimpose and interfere with the magnetic field generated by the magnetic roller itself, forming a complex magnetic field environment. At the same time, existing magnetic roller technology requires extremely precise control over changes in magnetic strength. Magnetic rollers rely on internal sensors to sense changes in the magnetic field, thereby determining the roller's rotation and calculating the number of flywheel rotations. However, in the presence of external magnetic field interference, the roller's own magnetic field and the interfering magnetic field influence each other, making the magnetic field changes complex and irregular. This makes it difficult for the internal sensors to accurately identify the portion of the magnetic field change caused solely by the roller's rotation from the chaotic magnetic field signals. Because the internal sensors cannot accurately identify key magnetic field changes, the magnetic roller cannot accurately calculate the number of flywheel rotations. Inaccurate calculations can cause operational deviations in the equipment, preventing it from operating precisely according to the pre-set program. Utility Model Content

[0003] To improve the accuracy of calculating the number of rotations of the flywheel, enhance the ability to sense changes in the magnetic field, and effectively solve the problem of inaccurate magnetic field sensing due to magnetic field interference, this application provides a flywheel module.

[0004] This application provides a flywheel module, including an assembly base and a roller, a rotating magnetic attractor, a stationary magnetic attractor, and a magnetic detection device located within the assembly base. The rotating magnetic attractor is fixedly disposed on the inner wall of the roller. The rotating magnetic attractor includes a rotating seat and a first magnet. The rotating seat is provided with a receiving groove, and the first magnet is embedded in the groove wall with its magnetic end exposed outside the groove wall. The stationary magnetic attractor includes a stationary seat and a second magnet. The stationary seat fixes the second magnet within the assembly base. The outer periphery of the second magnet is provided with a plurality of spaced grooves and protrusions. When the second magnet is disposed in the receiving groove, rotating the roller causes the rotating seat to rotate, and the magnetic end of the first magnet rotates relative to the grooves and protrusions. The stationary seat is provided with the magnetic detection device for detecting changes in the magnetic field strength between the first magnet and the second magnet. By adopting the above technical solution, when the roller rotates, it drives the rotating magnetic suction component fixed on its inner wall to rotate. Since the first magnet of the rotating magnetic suction component is embedded in the groove wall of the rotating seat and its magnetic end is exposed, while the second magnet of the stationary magnetic suction component is fixed in the assembly base and has several spaced grooves and protrusions on its outer circumference, and the second magnet is also located in the receiving groove, the magnetic end of the first magnet will rotate relative to the grooves and protrusions. During this relative rotation, the distance between the first and second magnets changes with the relative position of the first magnet with the grooves and protrusions. According to the principles of magnetism, since one pole of the first magnet is close to the groove and protrusion of the second magnet, the distance between the magnetic end of the first magnet and the groove is greater than the distance between the magnetic end of the first magnet and the protrusion. During rotation, this change in distance causes a significant change in the magnetic field strength, which can be quickly detected by the magnetic detection component installed on the stationary base. In this way, by counting and analyzing the changes in magnetic field strength, and combining the transmission ratio between the roller and the flywheel, the number of rotations of the flywheel can be accurately calculated. This avoids the problem of existing magnetic roller methods failing to accurately identify key magnetic field changes and inaccurate rotation counts due to external magnetic field interference in complex magnetic field environments. Preferably, the rotating seat is provided with a mounting groove, which is connected to the receiving groove. The first magnet is placed in the mounting groove, and its magnetic end is exposed at the connection between the mounting groove and the receiving groove. By adopting the above technical solution, the rotating seat is provided with a mounting groove connected to the receiving groove. The first magnet is placed in the mounting groove. Since the mounting groove and the receiving groove are connected, the magnetic end of the first magnet can be exposed at the connection between the mounting groove and the receiving groove. Thus, when the rotating roller drives the rotating seat to rotate, the exposed magnetic end of the first magnet can better rotate relative to the groove and protrusion of the second magnet. This allows the magnetic detection device to more accurately detect the changes in magnetic field strength between the first magnet and the second magnet, which helps to improve the accuracy of the flywheel rotation count calculation.Preferably, the first magnet has a T-shaped structure, and the mounting groove is a T-shaped groove with the smallest end of the T-shaped groove facing the receiving groove. By adopting the above technical solution, the first magnet is designed with a T-shaped structure, the mounting groove is a matching T-shaped groove, and the smallest end of the T-shaped groove faces the receiving groove. This structural design allows the first magnet to be stably placed in the mounting groove. Due to the characteristics of the T-shaped structure, its larger portion can prevent the first magnet from falling out of the mounting groove, ensuring the stability of the first magnet during the rotation of the rotating seat. At the same time, the smallest end of the T-shaped groove facing the receiving groove allows the magnetic pole of the first magnet to be accurately exposed at the connection between the mounting groove and the receiving groove, facilitating relative rotation between the magnetic pole of the first magnet and the groove and protrusion of the second magnet, thereby enabling the magnetic detection device to more accurately detect the change in magnetic field strength between the first magnet and the second magnet. Preferably, the width of the portion of the first magnet located at the smallest position of the T-shaped groove is equal to the width of the groove. By adopting the above technical solution, since the width of the portion of the first magnet located at the minimum diameter of the T-slot is equal to the width of the groove, when the roller drives the rotating seat to rotate, the groove and protrusion of the first magnet and the second magnet rotate relative to each other. This allows the first magnet to fit more precisely when passing through the groove, reducing errors caused by changes in the magnetic field. Consequently, the magnetic detection device can more accurately detect changes in the magnetic field strength between the first and second magnets, and thus more accurately calculate the number of rotations of the flywheel. Preferably, a connecting shaft is fixedly provided in the middle of the stationary seat, and the end of the connecting shaft passes through the middle of the rotating seat and extends into the assembly seat. The rotating seat rotates around the connecting shaft. By adopting the above technical solution, the connecting shaft is fixedly provided in the middle of the stationary seat, and the end of the connecting shaft passes through the middle of the rotating seat and extends into the assembly seat, giving the rotating seat a central axis around which it can rotate. When the roller rotates, driving the rotating seat to rotate, the rotating seat can rotate stably around the connecting shaft due to the positioning and support function of the connecting shaft, avoiding wobbling and offset during rotation, thus ensuring the stability of the relative rotation between the rotating magnetic component and the stationary magnetic component. Preferably, the surface of the stationary seat is provided with a snap-fit ​​block, and the assembly seat is provided with a snap-fit ​​groove that forms a snap-fit ​​engagement with the snap-fit ​​block. By adopting the above technical solution, the snap-fit ​​block on the surface of the stationary seat and the snap-fit ​​groove of the assembly seat form a snap-fit ​​engagement. In the assembly process, the snap-fit ​​block can be accurately embedded in the snap-fit ​​groove, realizing the rapid positioning of the stationary seat and the assembly seat. Since the snap-fit ​​engagement has a certain degree of tightness, it can effectively prevent the stationary seat from shaking or shifting during use, thereby ensuring the stable installation of the stationary seat in the assembly seat, and thus ensuring the accuracy and stability of the magnetic detection component on the stationary seat in detecting the change in magnetic field strength between the first magnet and the second magnet. Preferably, the opening of the snap-fit ​​groove extends to the edge of the assembly seat, and the opening of the snap-fit ​​groove is set upward.By adopting the above technical solution, the slot of the snap-fit ​​groove extends to the edge of the assembly base and is oriented upwards. This allows the snap-fit ​​block on the stationary base to slide directly and easily into the snap-fit ​​groove from the edge of the assembly base when the stationary base and the assembly base are snap-fitted together. Simultaneously, the upward-facing slot direction facilitates the snap-fit ​​block's smooth entry into the snap-fit ​​groove under gravity, thereby achieving rapid and accurate snap-fit ​​between the stationary base and the assembly base, improving assembly efficiency. Preferably, the rotating magnetic component further includes a connecting seat, which is disposed on the side of the rotating base where the mounting groove is located, for sealing the first magnet within the mounting groove. By adopting the above technical solution, the connecting seat is provided on the side of the rotating base where the mounting groove is located. The connecting seat can seal the mounting groove, preventing the first magnet from detaching from the mounting groove, thus ensuring that the first magnet is stably positioned within the mounting groove. This allows the first magnet to stably engage with the second magnet, ensuring the accuracy of detecting changes in magnetic field strength, and consequently, the accuracy of calculating the number of flywheel rotations. Preferably, the connecting seat has a protruding insert on its surface, and the rotating seat has a groove. The groove and the mounting groove are located on the same side of the rotating seat, and the insert extends into the groove. By adopting the above technical solution, the protruding insert on the surface of the connecting seat extends into the groove on the same side of the rotating seat as the mounting groove. This arrangement creates a more stable connection structure between the connecting seat and the rotating seat. In actual operation, when the roller rotates and drives the rotating seat to rotate, the stable connection structure ensures that the connecting seat and the rotating seat move synchronously, avoiding wobbling or displacement of the connecting seat during rotation. The connecting seat can more effectively seal the first magnet in the mounting groove. Preferably, the second magnet can be divided into several magnetic pieces along the axial direction. Each magnetic piece has several grooves and protrusions evenly spaced along its outer periphery. The magnetic pieces are fixedly connected to each other by the grooves facing each other and the protrusions facing each other. By adopting the above technical solution, the second magnet is divided into several magnetic sheets along the axial direction. Each magnetic sheet has grooves and protrusions evenly spaced along its outer periphery. The magnetic sheets are fixedly connected to each other with grooves facing each other and protrusions facing each other. This arrangement makes the relative rotation between the magnetic ends of the first magnet and the grooves and protrusions of the second magnet more regular and stable when the roller drives the rotating base to rotate. Because the grooves and protrusions of each magnetic sheet are evenly spaced, and the magnetic sheets are connected in a specific orientation, the change in magnetic field strength between the first and second magnets exhibits a more regular periodicity.

[0005] In summary, this application includes the following beneficial technical effects: By cooperating with the rotating magnetic attractor and the stationary magnetic attractor, the rotating roller drives the rotating seat to rotate, causing the magnetic pole of the first magnet to rotate relative to the groove and protrusion of the second magnet. Due to the arrangement of the groove and protrusion, the magnetic field distribution between the first magnet and the second magnet has a specific pattern. When the magnetic detection device detects the change in magnetic field strength between the two, this specific pattern of magnetic field change is easy to distinguish from external complex and irregular magnetic field interference, thereby avoiding external magnetic field interference and improving the accuracy of the flywheel rotation count calculation. Attached Figure Description

[0006] Figure 1 This is an exploded view of a flywheel module according to Embodiment 1; Figure 2 This is a structural diagram of a flywheel module according to Embodiment 1; Figure 3 This is a schematic diagram of the installation of the rotating base and the first magnet of a flywheel module in Embodiment 1; Figure 4 This is a side view of a flywheel module according to Embodiment 1; Figure 5 yes Figure 4 AA cross-section view.

[0007] Explanation of reference numerals in the attached drawings: 1. Assembly base; 2. Roller; 3. Rotating magnetic component; 4. Stationary magnetic component; 5. Magnetic detection component; 11. Positioning groove; 12. Snap-fit ​​groove; 13. Through hole; 31. Rotating base; 32. First magnet; 33. Connecting base; 311. Receiving groove; 312. Mounting groove; 313. Insert groove; 331. Insert block; 41. Stationary base; 42. Second magnet; 43. Connecting shaft; 44. Metal ring; 411. Snap-fit ​​block; 412. Abutment ring; 421. Groove; 422. Protrusion; 51. Sensing element; 52. Conducting element. Detailed Implementation

[0008] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0009] This application provides a flywheel module, which is described in the embodiment of the application. Figure 1 and Figure 2The system includes an assembly base 1, a roller 2, a rotating magnetic chuck 3, a stationary magnetic chuck 4, and a magnetic detection component 5. The roller 2, rotating magnetic chuck 3, stationary magnetic chuck 4, and magnetic detection component 5 are all located within the assembly base 1. The rotating magnetic chuck 3 is fixedly mounted on the inner wall of the roller 2, so that the rotation of the roller 2 drives the rotating magnetic chuck 3 to rotate relative to the assembly base 1. The stationary magnetic chuck 4 is fixed within the assembly base 1, allowing the rotating magnetic chuck 3 and the stationary magnetic chuck 4 to rotate relative to each other. The magnetic detection component 5 is located on the stationary base 41 and is used to detect changes in the magnetic field strength during the rotation of the rotating magnetic chuck 3 and the stationary magnetic chuck 4. This allows for accurate calculation of the flywheel's rotation count by detecting changes in the magnetic field between specific magnets in complex magnetic field environments.

[0010] Specifically, in this embodiment, the assembly base 1 is provided with a semi-annular cavity. The assembly base 1 is provided with positioning grooves 11 and snap-fit ​​grooves 12 that are opposite to each other. The positioning grooves 11 and snap-fit ​​grooves 12 are located on both sides of the semi-annular cavity. In addition, the assembly base 1 is also provided with at least one through hole 13 for forming a clearance fit with the magnetic detection element 5.

[0011] Specifically, in this embodiment, the outer wheel surface of the roller 2 is provided with a pattern for anti-slip, the middle part of the roller 2 is hollow, the rotating magnetic 3 is located in the hollow part of the middle of the roller 2, and forms an interference fit with the inner wheel surface of the roller 2 to realize the fixed connection between the rotating magnetic 3 and the roller 2.

[0012] Reference Figure 3 Specifically, in this embodiment, the rotating magnetic suction component 3 includes a rotating base 31, a first magnet 32, and a connecting base 33. The rotating base 31 has a receiving groove 311, a mounting groove 312, and an insert groove 313 on the side away from the positioning groove 11. The stationary magnetic suction component 4 is disposed within the receiving groove 311. The mounting groove 312 communicates with the receiving groove 311. The first magnet 32 ​​is disposed within the mounting groove 312, with its magnetic ends exposed at the groove opening where the mounting groove 312 communicates with the receiving groove 311. The first magnet 32 ​​is a permanent magnet, such as a neodymium iron boron permanent magnet. Neodymium iron boron permanent magnets have high magnetic strength and can generate a strong and stable magnetic field, which is beneficial for the subsequent magnetic detection component 5 to accurately detect changes in the magnetic field. The first magnet 32 ​​can be embedded in the mounting groove 312 by means of glue, which is simple to use and can firmly fix the first magnet 32 ​​to the groove wall of the mounting groove 312; or it can be embedded by means of interference fit, which can make the first magnet 32 ​​tightly connected to the groove wall of the mounting groove 312, ensuring that the first magnet 32 ​​will not loosen during rotation.

[0013] In this embodiment, the first magnet 32 ​​has a T-shaped structure, and the mounting groove 312 is a T-shaped groove, with the smallest end of the T-shaped groove facing the receiving groove 311. This T-shaped structure makes the first magnet 32 ​​more securely installed and less prone to falling off. Because after installation, the larger portion of the T-shaped first magnet 32 ​​can be held in place by the wider part of the T-shaped groove, preventing the first magnet 32 ​​from detaching from the groove. In this embodiment, there are four first magnets 32, which are evenly spaced and arranged around the wall of the receiving groove 311, corresponding to four mounting grooves 312.

[0014] The connecting seat 33 is located on the side of the rotating seat 31 with the mounting groove 312, and is used to seal the first magnet 32 ​​within the mounting groove 312. The connecting seat 33 prevents the first magnet 32 ​​from detaching from the mounting groove 312, further ensuring the stability of the structure. Specifically, by providing a protruding insert 331 on the surface of the connecting seat 33, and since the rotating seat 31 has a groove 313 located on the same side of the rotating seat 31, the insert 331 can extend into the groove 313. This cooperation between the insert 331 and the groove 313 makes the connection between the connecting seat 33 and the rotating seat 31 tighter and more accurate. When installing the connecting seat 33, aligning the insert 331 with the groove 313 and inserting it allows for quick positioning and connection between the connecting seat 33 and the rotating seat 31, while also preventing displacement of the connecting seat 33 during rotation. In this embodiment, there are four slots 313, which are arranged in a ring at even intervals on the side of the connecting seat 33 facing the rotating seat 31.

[0015] Reference Figure 4 and Figure 5Specifically, in this embodiment, the stationary magnetic chuck 4 includes a stationary base 41, a second magnet 42, and a connecting shaft 43. The stationary base 41 fixes the second magnet 42 within the assembly base 1. The second magnet 42 has several spaced grooves 421 and protrusions 422 arranged circumferentially. In particular, the width of the grooves 421 and the width of the protrusions 422 are equal, and the width of the portion of the first magnet 32 ​​located at the minimum diameter of the T-slot is equal to the width of the groove 421. This allows for more accurate generation of changes in magnetic field strength when the rotating magnetic chuck 3 rotates with the roller 2, and the grooves 421 and protrusions 422 of the first magnet 32 ​​and the second magnet 42 rotate relative to each other, providing a more precise detection signal for the magnetic detection component 5. The second magnet 42 is also a permanent magnet, and its outer grooves 421 and protrusions 422 are precisely machined to ensure regular magnetic field changes during relative rotation. When the second magnet 42 is placed in the receiving groove 311, the roller 2 is rotated to drive the rotating seat 31 to rotate, and the magnetic ends of the first magnet 32 ​​rotate relative to the groove 421 and the protrusion 422. During this relative rotation, due to the presence of the groove 421 and the protrusion 422, the distance between the first magnet 32 ​​and the second magnet 42 will continuously change, thereby causing the magnetic field strength between them to change periodically.

[0016] The stationary seat 41 has a connecting shaft 43 and a metal ring 44 fixedly mounted in its middle. The end of the connecting shaft 43 passes through the middle of the rotating seat 31, then through the metal ring 44, and finally extends into the positioning groove 11 of the assembly seat 1. The rotating seat 31 has a groove structure on its side near the positioning groove 11 to accommodate the metal ring 44. The rotating seat 31 rotates around the connecting shaft 43. The connecting shaft 43 provides a stable axis for the rotation of the rotating seat 31, ensuring the smoothness of the rotation. When the rotating seat 31 rotates around the connecting shaft 43, it can maintain a stable rotation trajectory, making the relative rotation between the first magnet 32 ​​and the second magnet 42 more regular, which is beneficial for the magnetic detection element 5 to accurately detect changes in the magnetic field.

[0017] The stationary base 41 has a protruding snap-fit ​​block 411 on its surface, and the assembly base 1 has a snap-fit ​​groove 12 that engages with the snap-fit ​​block 411. The groove of the snap-fit ​​groove 12 extends to the edge of the assembly base 1, and the groove of the snap-fit ​​groove 12 faces upward. This snap-fit ​​method facilitates the installation and removal of the stationary base 41 within the assembly base 1. Specifically, the snap-fit ​​block 411 has a snap-fit ​​protrusion structure on its surface, and the groove wall of the snap-fit ​​groove 12 has a groove-shaped structure that engages with the snap-fit ​​protrusion structure. When installing the stationary base 41, simply align the snap-fit ​​block 411 with the groove of the snap-fit ​​groove 12 and press it downward to achieve the snap-fit ​​engagement; when removing, lift the stationary base 41 upward, and the snap-fit ​​block 411 will disengage from the snap-fit ​​groove 12. Furthermore, the upward-facing groove makes the installation process more intuitive and convenient, allowing operators to clearly see the positional relationship between the snap-fit ​​block 411 and the snap-fit ​​groove 12, thus improving installation efficiency. Specifically, the side of the stationary seat 41 closest to the second magnet 42 extends outward with an abutment ring 412. When the flywheel module is assembled, the inner surface of the connecting seat 33 tightly abuts against the surface of the abutment ring 412 of the stationary seat 41, thereby locking the stationary seat 41 firmly in the assembly seat 1 and preventing the stationary seat 41 from shifting or falling off.

[0018] In this embodiment, the second magnet 42 can be divided into several magnetic sheets along the axial direction. Each magnetic sheet has several grooves 421 and protrusions 422 evenly spaced along its outer periphery. The magnetic sheets are fixedly connected to each other by the grooves 421 facing each other and the protrusions 422 facing each other. These magnetic sheets are manufactured by a stamping process. The combination of multiple magnetic sheets facilitates the processing and adjustment of the magnetic distribution and intensity of the second magnet 42. During the processing, each magnetic sheet can be stamped separately and then assembled together, which reduces the processing difficulty.

[0019] Specifically, in this embodiment, the magnetic detection component 5 is a bent sheet-like circuit board. The side of the stationary base 41 near the snap-fit ​​groove 12 is provided with a positioning post, and the sheet-like circuit board is provided with a positioning hole. Through the positioning hole and the positioning post, the sheet-like circuit board passes through the through hole 13 of the assembly base 1 and is fixed to the surface of the stationary base 41. In addition, since the surface of the sheet-like circuit board facing the stationary base 41 is provided with structures such as sensing element 51 and conducting element 52, the side of the stationary base 41 near the snap-fit ​​groove 12 is provided with a groove structure for accommodating the sensing element 51 and conducting element 52 on the surface of the sheet-like circuit board.

[0020] The implementation principle of this embodiment is as follows: When the roller 2 rotates, it drives the rotating magnetic chuck 3 to rotate. The first magnet 32 ​​on the rotating magnetic chuck 3 and the second magnet 42 on the stationary magnetic chuck 4 rotate relative to each other. Due to the presence of the groove 421 and protrusion 422 on the outer periphery of the second magnet 42, the magnetic field strength between the first magnet 32 ​​and the second magnet 42 changes periodically. After the magnetic detection component 5 detects these changes in magnetic field strength, it transmits the signals to the subsequent processing unit. By analyzing and processing these signals, and combining the transmission ratio between the roller 2 and the flywheel, the number of rotations of the flywheel can be accurately calculated. Compared with traditional magnetic roller detection methods, this solution reduces the influence of external magnetic field interference, improves the accuracy and stability of detection, and is more adaptable to complex industrial and usage environments, providing a guarantee for the precise operation of the equipment.

[0021] Example 2 The difference between this embodiment and Embodiment 1 is that the second magnet 42 in this embodiment is a single integral design, which is obtained by directly machining spaced grooves 421 and protrusions 422 on the surface of a cylindrical magnet structure. Everything else is the same as in Embodiment 1.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flywheel module, characterized in that, The assembly includes an assembly base (1) and a roller (2) located within the assembly base (1), a rotating magnetic attractor (3), a stationary magnetic attractor (4), and a magnetic detection element (5). The rotating magnetic attractor (3) is fixedly disposed on the inner wall of the roller (2). The rotating magnetic attractor (3) includes a rotating seat (31) and a first magnet (32). The rotating seat (31) is provided with a receiving groove (311). The first magnet (32) is embedded in the groove wall of the receiving groove (311), and its magnetic end is exposed outside the groove wall. The stationary magnetic attractor (4) includes a stationary seat (41) and a second magnet (42). The stationary seat (41) holds the roller (2) in place. The second magnet (42) is fixed in the assembly base (1). The second magnet (42) has a plurality of grooves (421) and protrusions (422) arranged at intervals on its outer periphery. When the second magnet (42) is placed in the receiving groove (311), the roller (2) is rotated to drive the rotating base (31) to rotate. The magnetic pole end of the first magnet (32) rotates relative to the grooves (421) and the protrusions (422). The stationary base (41) is provided with the magnetic detection element (5) for detecting the change in magnetic field strength between the first magnet (32) and the second magnet (42).

2. The flywheel module according to claim 1, characterized in that, The rotating base (31) is provided with a mounting groove (312), which is connected to the receiving groove (311). The first magnet (32) is placed in the mounting groove (312), and its magnetic end is exposed at the connection between the mounting groove (312) and the receiving groove (311).

3. The flywheel module according to claim 2, characterized in that, The first magnet (32) has a T-shaped structure, and the mounting groove (312) is a T-shaped groove with the smallest end of the groove diameter facing the receiving groove (311).

4. The flywheel module according to claim 3, characterized in that, The width of the portion of the first magnet (32) located at the minimum position of the T-groove diameter is equal to the groove width of the groove (421).

5. The flywheel module according to claim 1, characterized in that, A connecting shaft (43) is fixedly provided in the middle of the stationary seat (41). The end of the connecting shaft (43) passes through the middle of the rotating seat (31) and extends into the assembly seat (1). The rotating seat (31) rotates around the connecting shaft (43).

6. The flywheel module according to claim 1, characterized in that, The surface of the stationary seat (41) is provided with a snap-fit ​​block (411), and the assembly seat (1) is provided with a snap-fit ​​groove (12) that forms a snap-fit ​​engagement with the snap-fit ​​block (411).

7. The flywheel module according to claim 6, characterized in that, The slot of the snap-fit ​​groove (12) extends to the edge of the assembly base (1), and the slot of the snap-fit ​​groove (12) is set facing upward.

8. The flywheel module according to claim 2, characterized in that, The rotating magnetic suction component (3) also includes a connecting seat (33), which is disposed on the side of the rotating seat (31) where the mounting groove (312) is provided, and is used to seal the first magnet (32) in the mounting groove (312).

9. The flywheel module according to claim 8, characterized in that, The surface of the connecting seat (33) is provided with a protruding insert (331), and the rotating seat (31) is provided with a groove (313). The groove (313) and the mounting groove (312) are located on the same side of the rotating seat (31), and the insert (331) extends into the groove (313).

10. The flywheel module according to claim 1, characterized in that, The second magnet (42) can be divided into several magnetic sheets along the axial direction. Each magnetic sheet has several grooves (421) and protrusions (422) evenly spaced along its outer periphery. Each magnetic sheet is fixedly connected to the other by the orientation of the grooves (421) facing each other and the protrusions (422) facing each other.

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