Tooth misalignment device of motor rotor
By combining a support base, guide base, fixed base, misaligned tooth assembly, and drive assembly, the problem of insufficient accuracy of misaligned teeth in the rotor core of the linear motor rotor assembly is solved, and the accurate correction of the rotor core is achieved, meeting the high-precision step angle requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAYDON LINEAR MOTORS CHANGZHOU CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-31
AI Technical Summary
After the rotor shaft is installed, the misalignment accuracy of the six rotor cores in the existing linear motor rotor assembly is insufficient to meet the step angle accuracy requirements, resulting in a cumulative error exceeding 5%.
The system adopts a combined structure of support base, guide base, fixed base, first misaligned tooth assembly, movable base, second misaligned tooth assembly and drive assembly. The drive assembly drives the movable base to move, so that the rotor core cooperates with the misaligned tooth assembly, and the squeezing action corrects the misalignment accuracy of the rotor core.
The misalignment accuracy of the rotor core was improved, meeting the accuracy requirements of the six rotor cores and ensuring that the step angle accuracy was within the theoretical range.
Smart Images
Figure CN224583035U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to a tooth-shifting device for a motor rotor. Background Technology
[0002] The SIZE6 series linear motor is a linear motor currently in mass production by our company. Due to its stable quality, small size, and the use of six rotor cores in the rotor assembly, its thrust is significantly improved compared to conventional products on the market. Furthermore, it offers a variety of step length options and is widely used in the market.
[0003] The linear motor described above, wherein the rotor as a whole (e.g. Figure 1 The rotor core 2 includes a rotor shaft 1, a rotor core 2, multiple magnets 3, and multiple magnetic shielding plates 4. The rotor core 2, magnets 3, and magnetic shielding plates 4 are mounted on the rotor shaft 1. A magnet 3 is provided between the first rotor core and the rotor core adjacent to it, and a magnet 3 is provided between the last rotor core and the rotor core adjacent to it. The remaining rotor cores 2 located between the first and last rotor cores 2 are separated by magnetic shielding plates 4. Multiple teeth 2a are arranged circumferentially on the surface of each rotor core 2, and a tooth groove 2b is formed between two adjacent teeth 2a.
[0004] Since most conventional rotor assemblies use a structure with 2 or 4 rotor cores, after installing the rotor shaft, the teeth on the two adjacent rotor cores are first misaligned (tooth misalignment) before the shaft is assembled. This assembly method can easily cause cumulative errors in the entire rotor assembly. For rotors with 6 rotor cores, the tooth misalignment accuracy requirement is even higher to ensure that the step angle accuracy does not exceed 5% of the theoretical angle. Therefore, the above method of misaligning the teeth before installing the rotor shaft cannot meet the accuracy requirements of rotors with 6 rotor cores. Utility Model Content
[0005] This invention provides a tooth misalignment device for an electric motor rotor, which can improve the accuracy requirements of rotor core misalignment.
[0006] The tooth-shifting device for an electric motor rotor includes a support base, a guide base, a fixed base, a first tooth-shifting assembly, a movable base, a second tooth-shifting assembly, and a drive assembly. The support base has mounting holes for mounting the rotor shaft. The guide base is fixed to the support base, and a guide portion is formed between the guide base and the support base, or the guide base has a guide portion. The fixed base is located on one side of the mounting hole and is fixed to the support base. The first tooth-shifting assembly is fixed to the fixed base. The movable base is located on the other side of the mounting hole and cooperates with the guide portion. The second tooth-shifting assembly is fixed to the movable base and is arranged opposite to the first tooth-shifting assembly. The drive assembly that drives the movable base to move along the guide portion is connected to the movable base.
[0007] Furthermore, the fixed base is provided with a first groove, which includes a first assembly groove and a first clearance groove for making way for the rotor core. The first clearance groove communicates with the first assembly groove, and the first tooth misalignment assembly cooperates with the first assembly groove.
[0008] Furthermore, the first toothed assembly includes a first pressing component and a second pressing component. The second pressing component and the first pressing component are arranged alternately along the height direction of the fixed base. The end of the first pressing component is provided with a first tooth groove that engages with the teeth on the rotor core, and the end of the second pressing component is provided with a first protruding tooth that engages with the tooth groove on the rotor core.
[0009] Furthermore, the movable seat is provided with a second groove, which includes a second assembly groove and a second clearance groove for making way for the rotor core. The second clearance groove communicates with the second assembly groove, and the second toothed assembly cooperates with the second assembly groove.
[0010] Furthermore, the second toothed assembly includes a third pressing component and a fourth pressing component, which are arranged alternately along the height direction of the movable seat. The end of the third pressing component is provided with a second tooth groove that mates with the teeth on the rotor core, and the end of the fourth pressing component is provided with a second protruding tooth that mates with the tooth groove on the rotor core.
[0011] Furthermore, the drive assembly includes a connecting seat, a handle, a connecting rod, a guide sleeve, and a transmission rod. The handle is hinged to the connecting seat, one end of the connecting rod is connected to the handle, the other end of the connecting rod is hinged to one end of the transmission rod, the transmission rod passes through the guide sleeve and slides with the guide sleeve, and the other end of the transmission rod is connected to the movable seat.
[0012] In use, the rotor shaft 1 is inserted into the mounting hole, and the circumferential surface of the rotor core initially engages with the first misaligned tooth assembly. Then, the drive assembly drives the movable seat to move linearly towards the fixed seat, and the second misaligned tooth assembly moves linearly along with the movable seat. The second misaligned tooth assembly engages with the circumferential surface of the rotor core. As the second misaligned tooth assembly continues to feed towards the rotor core, the rotor core is clamped between the first and second misaligned tooth assemblies. If there is an error in the misalignment accuracy of the multiple rotor cores assembled on the rotor shaft, the squeezing action of the first and second misaligned tooth assemblies forces these rotor cores to rotate circumferentially, thereby ensuring that the misalignment accuracy of the multiple rotor cores meets the requirements. Attached Figure Description
[0013] Figure 1 This is a structural diagram of the motor rotor.
[0014] Figure 2 This is a perspective view of the tooth-shifting device of the motor rotor of this utility model.
[0015] Figure 3 In order to be in Figure 2This is a schematic diagram with some parts hidden and viewed from another direction.
[0016] Figure 4 This is an assembly drawing of the movable seat and drive assembly.
[0017] Figure 5 This is a three-dimensional view of the first toothed assembly.
[0018] Figure 6 This is a three-dimensional view of the second toothed assembly.
[0019] Labels in the attached diagram:
[0020] 1. Rotor shaft, 2. Rotor core, 2a. Tooth groove, 2b. Magnet, 3. Magnetic shielding sheet.
[0021] Support base 11, mounting hole 11a, guide seat 12, guide part 12a, fixed seat 13, first assembly groove 13a, first clearance groove 13b, first cover plate 13c, movable seat 14, second assembly groove 14a, second clearance groove 14b, second cover plate 14c, first extrusion component 15, first tooth groove 15a, first T-block 15b, first boss 15c, second extrusion component 16, first protruding tooth 16a, second T-block 16b, second boss 16c, third extrusion component 17, third T-block 17b, third boss 17c, second tooth groove 17a, fourth extrusion component 18, second protruding tooth 18a, fourth T-block 18b, fourth boss 18c, connecting seat 19, handle 20, connecting rod 21, guide sleeve 22, transmission rod 23. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] like Figures 1 to 6 The present invention discloses a tooth-shifting device for a motor rotor, comprising a support base 11, a guide base 12, a fixed base 13, a first tooth-shifting assembly, a movable base 14, a second tooth-shifting assembly, and a drive assembly. The support base 11 is provided with a mounting hole 11a for mounting the rotor shaft. The guide base 12 is fixed to the support base 11, and a guide portion 12a is formed between the guide base 12 and the support base 11, or the guide base 12 is provided with a guide portion 12a. In this embodiment, an extension portion 12b is preferably provided on the end face of the guide base 12, and a groove is formed between the extension portion 12b and the support base 11. This groove is the guide portion 12a.
[0024] The fixed seat 13 is located on one side of the mounting hole 11a and is fixed to the support seat 11. The first toothed assembly is fixed to the fixed seat 13. The movable seat 14 is located on the other side of the mounting hole 11a. The movable seat 14 cooperates with the guide portion 12a. The second toothed assembly is fixed to the movable seat 14. The second toothed assembly is arranged opposite to the first toothed assembly. The drive assembly that drives the movable seat 14 to move along the guide portion 12a is connected to the movable seat 14.
[0025] In use, the rotor shaft 1 is inserted into the mounting hole 11a, and the circumferential surface of the rotor core 2 initially engages with the first misaligned tooth assembly. Then, the driving assembly drives the movable seat 14 to move linearly towards the fixed seat 13. The second misaligned tooth assembly moves linearly along with the movable seat 14 and engages with the circumferential surface of the rotor core 2. As the second misaligned tooth assembly continues to feed towards the rotor core 2, the rotor core 2 is clamped between the first misaligned tooth assembly and the second misaligned tooth assembly. If there is an error in the misalignment accuracy of the multiple rotor cores 2 assembled on the rotor shaft 1, the squeezing action of the first misaligned tooth assembly and the second misaligned tooth assembly forces these rotor cores 2 to rotate circumferentially, thereby ensuring that the misalignment accuracy of the multiple rotor cores 2 meets the requirements.
[0026] The fixed base 13 is provided with a first groove, which includes a first assembly groove 13a and a first clearance groove 13b for making way for the rotor core 2. The first clearance groove 13b is connected to the first assembly groove 13a. The first assembly groove 13a is a T-shaped groove, and the first staggered tooth assembly cooperates with the first assembly groove 13a.
[0027] A first cover plate 13c is fixed to the fixed seat 13 by screws, the first cover plate 13c restricting the first misaligned tooth assembly within the first groove, and a second cover plate 14c is fixed to the movable seat 14 by screws, the second cover plate 14c restricting the second misaligned tooth assembly within the second groove.
[0028] The first toothed assembly includes a first pressing component 15 and a second pressing component 16. The second pressing component 16 and the first pressing component 15 are arranged alternately along the height direction of the fixed base 13. The end of the first pressing component 15 is provided with a first tooth groove 15a that cooperates with the tooth 2a on the rotor core 2. The end of the second pressing component 16 is provided with a first protruding tooth 16a that cooperates with the tooth groove 2b on the rotor core 2.
[0029] The first extrusion component 15 includes a first T-shaped block 15b and a first boss 15c. The first T-shaped block 15b engages with a first T-shaped mounting groove 13a. The first boss 15c is fixed to the end of the first T-shaped block 15b, and the first toothed groove 15a is disposed on the first boss 15c. The second extrusion component 16 includes a second T-shaped block 16b and a second boss 16c. The second T-shaped block 16b engages with a first T-shaped mounting groove 13a. The second boss 16c is fixed to the end of the second T-shaped block 16b, and the first toothed groove 16a is disposed on the second boss 16c.
[0030] The movable seat 14 is provided with a second groove, which includes a second assembly groove 14a and a second clearance groove 14b for making way for the rotor core 2. The second clearance groove 14b communicates with the second assembly groove 14a. The second assembly groove 14a is a T-shaped groove, and the second staggered tooth assembly cooperates with the second assembly groove 14a. The second staggered tooth assembly includes a third pressing component 17 and a fourth pressing component 18, which are arranged alternately along the height direction of the movable seat 14. The end of the third pressing component 17 is provided with a second tooth groove 17a that cooperates with the tooth 2a on the rotor core 2, and the end of the fourth pressing component 18 is provided with a second protruding tooth 18a that cooperates with the tooth groove 2b on the rotor core 2.
[0031] The third extrusion component 17 includes a third T-shaped block 17b and a third boss 17c. The third T-shaped block 17b engages with a second T-shaped mounting groove 14a, and the third boss 17c is fixed to the end of the third T-shaped block 17b. The second toothed groove 17a is disposed on the third boss 17c. The fourth extrusion component 18 includes a fourth T-shaped block 18b and a fourth boss 18c. The fourth T-shaped block 18b engages with a second T-shaped mounting groove 14a, and the fourth boss 18c is fixed to the end of the fourth T-shaped block 18b. The second toothed groove 18a is disposed on the fourth boss 18c.
[0032] The drive assembly includes a connecting seat 19, a handle 20, a connecting rod 21, a guide sleeve 22, and a transmission rod 23. The handle 20 is hinged to the connecting seat 19. One end of the connecting rod 21 is connected to the handle 20, and the other end of the connecting rod 21 is hinged to one end of the transmission rod 23. The transmission rod 23 passes through the guide sleeve 22 and slides with the guide sleeve 22. The guide sleeve 22 is fixed to the connecting seat 19, and the other end of the transmission rod 23 is connected to the movable seat 14.
[0033] After the rotor shaft 1 is inserted into the mounting hole 11a, the rotor core 2 initially engages with the first misaligned tooth assembly. This initial engagement means that if there is an error in the misalignment accuracy of the multiple rotor cores 2 assembled on the rotor shaft 1, then the first tooth groove 15a meshes with a portion of the tooth 2a on the rotor core 2, and a portion of the first convex tooth 16a engages with the tooth groove 2b.
[0034] Rotating handle 20 transmits force to transmission rod 23 via connecting rod 21, causing transmission rod 23 to move linearly along guide sleeve 22. Guide sleeve 23 drives movable seat 14 to move linearly towards fixed seat 13. The second misaligned tooth assembly moves linearly with movable seat 14, initially engaging with rotor core 2. This initial engagement means that if there is an error in the misalignment accuracy of the multiple rotor cores 2 assembled on rotor shaft 1, the second tooth groove 17a meshes with a portion of the tooth 2a on rotor core 2, and a portion of the second convex tooth 18a engages with tooth groove 2b. As the second misaligned tooth assembly continues to feed towards rotor core 2, the first and second misaligned tooth assemblies exert a squeezing effect on rotor core 2. The first tooth groove 15a and the second tooth groove 17a exert squeezing force on tooth 2a, and the first convex tooth 16a and the second convex tooth 18a exert squeezing force on tooth groove 2b, thereby forcing rotor core 2 to rotate circumferentially, thus correcting the position of multiple rotor cores 2 to meet design requirements.
Claims
1. A cogging device for a rotor of an electric machine, characterized in that The assembly includes a support base (11), a guide base (12), a fixed base (13), a first toothed assembly, a movable base (14), a second toothed assembly, and a drive assembly. The support base (11) has a mounting hole (11a) for mounting the rotor shaft. The guide base (12) is fixed to the support base (11), and a guide portion (12a) is formed between the guide base (12) and the support base (11), or the guide base (12) has a guide portion (12a). The fixed base (13) is located on one side of the mounting hole (11a) and is fixed to the support base (11). The first toothed assembly is fixed to the fixed base (13). The movable base (14) is located on the other side of the mounting hole (11a) and cooperates with the guide portion (12a). The second toothed assembly is fixed to the movable base (14). The second toothed assembly is arranged opposite to the first toothed assembly. The drive assembly that drives the movable base (14) to move along the guide portion (12a) is connected to the movable base (14).
2. The tooth-shifting device for the motor rotor according to claim 1, characterized in that, The fixed base (13) is provided with a first groove, which includes a first assembly groove (13a) and a first clearance groove (13b) for making way for the rotor core (2). The first clearance groove (13b) is in communication with the first assembly groove (13a), and the first tooth misalignment assembly is engaged with the first assembly groove (13a).
3. The tooth-shifting device for the motor rotor according to claim 1, characterized in that, The first toothed assembly includes a first pressing component (15) and a second pressing component (16). The second pressing component (16) and the first pressing component (15) are arranged alternately along the height direction of the fixed base (13). The end of the first pressing component (15) is provided with a first tooth groove (15a) that mates with the tooth (2a) on the rotor core (2). The end of the second pressing component (16) is provided with a first protruding tooth (16a) that mates with the tooth groove (2b) on the rotor core (2).
4. The tooth-shifting device for the motor rotor according to claim 1, characterized in that, The movable seat (14) is provided with a second groove, which includes a second assembly groove (14a) and a second clearance groove (14b) for making way for the rotor core (2). The second clearance groove (14b) is in communication with the second assembly groove (14a), and the second toothed assembly is engaged with the second assembly groove (14a).
5. The tooth-shifting device for the motor rotor according to claim 1, characterized in that, The second toothed assembly includes a third pressing component (17) and a fourth pressing component (18). The third pressing component (17) and the fourth pressing component (18) are arranged alternately along the height direction of the movable seat (14). The end of the third pressing component (17) is provided with a second tooth groove (17a) that mates with the tooth (2a) on the rotor core (2). The end of the fourth pressing component (18) is provided with a second protruding tooth (18a) that mates with the tooth groove (2b) on the rotor core (2).
6. The tooth-shifting device for the motor rotor according to claim 1, characterized in that, The drive assembly includes a connecting seat (19), a handle (20), a connecting rod (21), a guide sleeve (22), and a transmission rod (23). The handle (20) is hinged to the handle (20). One end of the connecting rod (21) is connected to the connecting seat (19), and the other end of the connecting rod (21) is hinged to one end of the transmission rod (23). The transmission rod (23) passes through the guide sleeve (22) and slides with the guide sleeve (22). The other end of the transmission rod (23) is connected to the movable seat (14).