Rotor positioning device

Abstract

This disclosure provides a rotor positioning device, belonging to the field of motor manufacturing technology. The positioning device includes a drive component and a detection component. The output shaft of the drive component is connected to one end of the rotor to be tested. The detection component is located on one side of the drive component and on the outer periphery of the rotor core. The detection component is configured to detect the presence of teeth on the rotor core within its detection range. The positioning device provided by this disclosure can quickly locate the rotor's position, enabling rapid electrical connection between the commutator on the rotor and external testing equipment.

Description

Technical Field

[0001] This disclosure relates to the field of electric motor manufacturing technology, and in particular to a rotor positioning device. Background Technology

[0002] In AC synchronous motors, the rotor's performance needs to be tested before assembly, such as magnetic flux leakage testing and insulation resistance testing. Poor rotor performance may lead to problems such as motor starting failure and unstable operation.

[0003] In related technologies, during rotor testing, a positioning device is needed to adjust the rotor's rotation angle so that the external contact point of the commutator on the rotor aligns with and electrically connects to the connection point of the external testing equipment. The rotor's iron core has multiple teeth on its outer circumference. A rotor slot is defined between two adjacent teeth. The external contact point of the commutator is located in one of the rotor slots or is arranged corresponding to one of the rotor slots. The positioning device is typically a lever, one end of which is inserted into the rotor slot. By controlling the lever, the rotor rotates. While the rotor rotates, it is observed whether the external contact point of the commutator aligns with the connection point of the external testing equipment. Once aligned, the two are electrically connected.

[0004] However, the above positioning process is not only complex and inefficient, but also prone to errors. Utility Model Content

[0005] This disclosure provides a rotor positioning device that can quickly locate the rotor's position during rotor testing, enabling rapid electrical connection between the rotor's commutator and an external testing device. The technical solution is as follows:

[0006] This disclosure provides a rotor positioning device, which includes a drive component and a detection component. The output shaft of the drive component is connected to one end of the rotor to be detected. The detection component is located on one side of the drive component and on the outer periphery of the core of the rotor to be detected. The detection component is configured to detect whether there are teeth of the core of the rotor within its detection range.

[0007] In another implementation of this disclosure, the detection component includes an inductive proximity switch.

[0008] In another implementation of this disclosure, there are multiple inductive proximity switches, and the multiple inductive proximity switches are arranged at intervals along the length direction of the output shaft of the drive member.

[0009] In another implementation of this disclosure, the inductive proximity switch is suspended directly above the iron core of the rotor to be detected, and the shortest distance between the switch and the iron core is 1-2 mm.

[0010] In another implementation of this disclosure, the detection component further includes a detection bracket located above the iron core and having an arc-shaped surface facing the iron core; the inductive proximity switch is connected to the detection bracket, and the detection end of the inductive proximity switch is located between the arc-shaped surface and the iron core.

[0011] In another implementation of this disclosure, the detection bracket is provided with a power supply component for supplying power to the inductive proximity switch.

[0012] In another implementation of this disclosure, the driving component includes a positioning motor and a clamping component; the clamping component is located on one side of the positioning motor, one side of the clamping component is connected to the output shaft of the positioning motor, and the other side of the clamping component is used to connect to the rotor to be detected.

[0013] In another implementation of this disclosure, the clamping member is a cylinder including grippers, the grippers of which are used to clamp the rotor to be tested.

[0014] In another implementation of this disclosure, the positioning device further includes a frame for suspending the rotor to be detected. The frame includes a connector and a plurality of parallel support arms. One end of each support arm is connected to the connector, and the other end is placed on the ground. The drive unit and the detection component are connected to the connector at intervals.

[0015] In another implementation of this disclosure, the frame further includes a U-shaped locking member; the locking member is fitted over the bottom of the support arm away from the connector and is connected to the support arm, and the locking member is used to fix it to the ground.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] Before testing the rotor, the positioning device provided in this embodiment is used to determine the rotor's position. Since the positioning device includes a drive unit, and the output shaft of the drive unit is connected to one end of the rotor to be tested to drive the rotor to rotate, the drive unit can be controlled to rotate the rotor, thereby adjusting the rotor's position in real time.

[0018] Furthermore, since the positioning device also includes a detection component, and this component is configured to detect whether the teeth of the rotor core exist within its detection range, and because the outer circumference of the core has multiple rotor slots and teeth, the position of the rotor directly opposite the detection component changes continuously as the rotor rotates. This naturally alters the surrounding environment of the detection component. When the rotor slot is directly aligned with the detection component, it indicates that there is no metal within its detection range. Conversely, when the rotor slot is misaligned (i.e., the teeth are directly aligned with the detection component), it indicates that metal is present within its detection range. Thus, the alignment of the rotor slot with the detection component can be determined based on the detection results. Once the rotor slot is aligned with the detection component, it can be further examined or confirmed whether it is the target rotor slot. If it is the target rotor slot, it confirms that the external contact point of the commutator corresponding to the target rotor slot is aligned with the connection contact point of the detection device, significantly improving positioning efficiency and accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of a rotor positioning device provided in an embodiment of this disclosure;

[0021] Figure 2 for Figure 1 Side view;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 1 Top view.

[0024] The symbols in the diagram represent the following meanings:

[0025] 1. Driving components; 11. Positioning motor; 12. Clamping components;

[0026] 2. Detection components; 21. Inductive proximity switch; 22. Detection bracket; 220. Curved surface; 221. Horizontal plate; 222. Vertical plate;

[0027] 3. Frame; 31. Connector; 311. Main connecting rod; 312. Support rod; 313. Connecting block; 32. Support arm; 33. Locking component. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0029] In related technologies, a rotor includes a shaft, an iron core, and a commutator. The shaft is inserted into and connected to the iron core. The iron core is a ferrite magnet structural component. The outer circumference of the iron core has multiple evenly distributed teeth. A rotor slot is defined between two adjacent teeth. The commutator is fitted over the shaft and located on one side of the iron core. The commutator and shaft are interference-fitted. The outer contact point of the commutator corresponds to one of the rotor slots (target rotor slot), or the outer contact point of the commutator is located within one of the rotor slots (target rotor slot).

[0030] This disclosure provides a rotor positioning device, such as... Figure 1 As shown, the positioning device includes a drive component 1 and a detection component 2. The output shaft of the drive component 1 is used to connect to one end of the rotor to be detected, so as to drive the rotor to be detected to rotate.

[0031] The detection component 2 is located on one side of the drive component 1 and on the outer periphery of the iron core of the rotor to be detected. The detection component 2 is configured to detect whether there are teeth of the iron core of the rotor within its detection range.

[0032] Before testing the rotor, when using the positioning device provided in this embodiment to determine the rotor's position, since the positioning device includes a drive member 1 and the output shaft of the drive member 1 is connected to one end of the rotor to be tested to drive the rotor to be tested to rotate, the drive member 1 can be controlled to drive the rotor to rotate, thereby adjusting the rotor's position in real time.

[0033] Furthermore, since the positioning device also includes a detection component 2, and the detection component 2 is configured to detect whether the teeth of the rotor core exist within its detection range. Moreover, since the outer circumference of the core has multiple teeth and multiple rotor slots, the position of the rotor directly opposite the detection component changes continuously as the rotor rotates, thus changing the surrounding environment of the detection component 2. When the rotor slot is directly opposite the detection component 2, it indicates that there is no metal within the detection range of the detection component 2. When the rotor slot is misaligned with the detection component 2 (i.e., the teeth are directly opposite the detection component 2), it indicates that there is metal within the detection range of the detection component 2. Thus, the detection result of the detection component 2 can be used to determine whether the rotor slot is directly opposite the detection component 2. Once the rotor slot is aligned with the detection component 2, it can be further checked or confirmed whether the rotor slot is the target rotor slot. If it is the target rotor slot, it is determined that the outer contact point of the commutator corresponding to the target rotor slot is aligned with the connection contact point of the detection device, greatly improving positioning efficiency and accuracy.

[0034] Figure 2 for Figure 1 The side view, combined with Figure 2 Optionally, the detection component 2 includes an inductive proximity switch 21, which is located on the outer periphery of the rotor to be detected.

[0035] The inductive proximity switch 21 is a non-contact sensor that detects metal objects using the principle of electromagnetic induction. The inductive proximity switch 21 includes an oscillator, a switching circuit, and an amplification output circuit. The oscillator typically consists of an LC oscillation circuit composed of a coil wound around a magnetic core. When energized, the oscillator generates a high-frequency alternating electromagnetic field. When an external metal object approaches this magnetic field and reaches the sensing area, eddy currents are generated within the metal object, causing the LC oscillation circuit to weaken or stop oscillating. The changes in oscillation and cessation are processed by the subsequent amplification output circuit and converted into a switching signal for the switching circuit, thus achieving non-contact metal detection. Therefore, the detection component 2 is set as an inductive proximity switch 21. In this way, after the inductive proximity switch 21 is energized, it generates a high-frequency magnetic field. When the rotor's iron core is directly opposite the inductive proximity switch 21, eddy currents are generated inside the inductive proximity switch 21, affecting the magnetic field and causing the inductive proximity switch 21 to output a low-level signal. When the rotor slot is aligned with the inductive proximity switch 21, the magnetic field of the inductive proximity switch 21 will not be affected by the surrounding metal, and the inductive proximity switch 21 will output a high-level signal.

[0036] In other words, the inductive proximity switch 21 generates a magnetic field when energized, and this magnetic field is affected by the surrounding metal. Therefore, when the rotor is rotating, due to the presence of the rotor slots, the inductive proximity switch 21 will sense that the teeth of the iron core or the rotor slots are directly opposite it, and thus output electrical signals of different levels.

[0037] In other examples, the inductive proximity switch 21 can be replaced by other structures, such as Hall effect proximity switches, displacement proximity switches, etc.

[0038] Combination Figure 1 Optionally, there are multiple inductive proximity switches 21, and the multiple inductive proximity switches 21 are arranged at intervals along the length direction of the output shaft of the drive unit 1.

[0039] This can further improve the detection efficiency and accuracy of the detection component 2, and also prevent the situation where one of the inductive proximity switches 21 fails and cannot detect.

[0040] In this embodiment, there are two inductive proximity switches 21, which are located at the two ends of the iron core respectively.

[0041] For example, in order to enable the inductive proximity switch 21 to have stable detection performance and fast frequency response, the inductive proximity switch 21 is suspended directly above the iron core of the rotor to be detected, and the shortest distance between the inductive proximity switch 21 and the iron core is 1-2mm.

[0042] Combination Figure 2 Optionally, the detection assembly 2 also includes a detection bracket 22 arranged in a one-to-one correspondence with the inductive proximity switch 21. The detection bracket 22 is located above the iron core and has an arc-shaped surface 220 facing the iron core.

[0043] Figure 3 for Figure 2 Enlarged view of point A in the middle, combined with Figure 3 The inductive proximity switch 21 is connected to the detection bracket 22, and the detection end of the inductive proximity switch 21 is located between the arc-shaped surface 220 and the iron core.

[0044] In the above implementation, the detection bracket 22 is used to mount the inductive proximity switch 21, so that the inductive proximity switch 21 can be suspended directly above the iron core of the rotor to be detected. Moreover, the detection bracket 22 has an arc-shaped surface 220, which prevents the rotor from interfering with the detection bracket 22 when it rotates.

[0045] Combination Figure 2 For example, the detection bracket 22 is an L-shaped block structure, including a horizontal plate 221 and a vertical plate 222 that are perpendicular to each other and connected. The side of the horizontal plate 221 away from the vertical plate 222 defines an arcuate surface 220. The arcuate surface 220 may be semi-circular and has a clearance fit with the outer circle of the iron core. The fixed end of the inductive proximity switch 21 is connected to the horizontal plate 221, and the detection end of the inductive proximity switch 21 protrudes beyond the arcuate surface 220.

[0046] Optionally, the detection bracket 22 is provided with a power supply component for supplying power to the inductive proximity switch 21.

[0047] In the above implementation, a power supply component is provided in the detection bracket 22 to provide power to the inductive proximity switch 21, thus avoiding the need for external wires to connect the inductive proximity switch 21 to an external power source. The power supply component can be a battery pack, etc.

[0048] Optionally, the drive unit 1 includes a positioning motor 11 and a clamping member 12. The clamping member 12 is located on one side of the positioning motor 11, and one side is connected to the output shaft of the positioning motor 11. The other side of the clamping member 12 is used to connect to the rotor to be tested.

[0049] In the above implementation, the positioning motor 11 provides power for the rotation of the rotor. The clamping member 12 connects the rotor to the positioning motor so that the rotor can rotate together with the positioning motor. This avoids the need for manual control of the rotor rotation, and the rotation angle of the rotor can be precisely controlled by the positioning motor 11.

[0050] In other examples, the positioning motor 11 can be replaced by an electric motor or the like. And the clamping component 12 can be replaced by a structure such as a coupling.

[0051] In this embodiment, the clamping member 12 is a cylinder containing grippers, and the grippers of the clamping member 12 are used to clamp the rotor to be tested.

[0052] In the above implementation, the clamping member 12 is set as a cylinder, which can easily clamp the end of the rotor through the clamping jaws, thereby making the rotor and the clamping member 12 a single unit. At the same time, no new structure is added to the rotor, thus not affecting the use of the rotor.

[0053] In other embodiments, the clamping member 12 may also be other structures, such as fasteners.

[0054] The rotor has mounting holes for fasteners, and the fasteners are fixedly connected to the positioning motor 11.

[0055] Optionally, the rotor positioning device further includes a frame 3 for suspending the rotor to be tested, with the drive unit 1 and the detection assembly 2 all spaced apart on the frame 3. The frame 3 includes a connector 31 and multiple support arms 32, which are spaced apart along the length of the output shaft of the drive unit 1 on the same side of the connector 31. One end of each support arm 32 is connected to the connector 31, and the other end is placed on the ground.

[0056] The driving component 1 and the detection component 2 are both located at intervals on the side of the connector 31 facing the support arm 32, and the driving component 1 and the detection component 2 are respectively connected to the connector 31.

[0057] In the above implementation, the arrangement of the frame 3 facilitates the fixing of the detection component 2 and the rotor to be tested. The connector 31 provides a mounting base for the detection component 2 and the rotor, while the support arm 32 supports the connector 31, allowing it to be suspended, thereby suspending the rotor on the detection platform for easy rotation.

[0058] In this embodiment, the connector 31 includes a main connecting rod 311, a support rod 312, and a connecting block 313. The length direction of the main connecting rod 311 is the same as the length direction of the output shaft of the drive component 1. The support rod 312 is located on one side of the main connecting rod 311, with one end connected to the main connecting rod 311 and the other end connected to the positioning motor 11.

[0059] The connecting block 313 and the positioning motor 11 are located on opposite sides of the support rod 312. One side of the connecting block 313 is connected to the main connecting rod 311, and the other side is connected to the detection bracket 22.

[0060] In the above implementation, the main connecting rod 311 is used to connect with multiple support arms 32 to provide an installation base for the support rod 312 and the connecting block 313.

[0061] The support rod 312 is used to connect to the positioning motor 11 so that the positioning motor 11 is fixed on the frame 3. The connecting block 313 is used to connect to the detection component 2 so that the detection component 2 can be securely installed on the frame 3.

[0062] Figure 4 for Figure 1 Top view, combined Figure 4 Optionally, the frame 3 also includes a U-shaped locking member 33. The locking member 33 is fitted around the bottom of the support arm 32 away from the connector 31 and is connected to the support arm 32. The locking member 33 is used to fix it to the ground.

[0063] In the above implementation, the locking member 33 is used to install the support arm 32 on the ground to facilitate the assembly and disassembly of the support arm 32.

[0064] The power supply components mentioned above can be battery packs, etc.

[0065] Optionally, the locking member 33 has multiple connecting holes spaced apart circumferentially along the U-shaped cavity. Fasteners are inserted into the connecting holes, allowing the locking member 33 to be detachably fixed to the ground.

[0066] The working process of the positioning device provided in the embodiments of this disclosure is briefly described below:

[0067] Before the rotor is tested, the end of the rotor to be tested is first clamped and fixed using the clamping member 12. Simultaneously, the testing assembly 2 is electrically connected to the power supply, and the contact point of the testing equipment for the rotor is fixed above the commutator. Then, the positioning motor 11 is started, and its rotation drives the rotor to rotate, thereby adjusting the rotor's position in real time.

[0068] When the rotor rapidly rotates to the target position (the target rotor slot aligns with the inductive proximity switch 21), and the inductive proximity switch 21 outputs a high level, it indicates that the rotor is at the target position. The external contact point of the commutator is then aligned with the connection contact point of the detection device, and the two are then electrically connected.

[0069] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A rotor positioning device, characterized in that, The positioning device includes a drive unit (1) and a detection component (2), wherein the output shaft of the drive unit (1) is used to connect to one end of the rotor to be detected; The detection component (2) is located on one side of the drive member (1) and on the outer periphery of the iron core of the rotor to be detected. The detection component (2) is configured to detect whether there are teeth of the iron core of the rotor within the detection range of the detection component (2).

2. The rotor positioning device according to claim 1, characterized in that, The detection component (2) includes an inductive proximity switch (21).

3. The rotor positioning device according to claim 2, characterized in that, There are multiple inductive proximity switches (21), and the multiple inductive proximity switches (21) are arranged at intervals along the length direction of the output shaft of the drive member (1).

4. The rotor positioning device according to claim 2, characterized in that, The inductive proximity switch (21) is suspended directly above the iron core of the rotor to be detected, and the shortest distance between the switch and the iron core is 1-2 mm.

5. The rotor positioning device according to claim 4, characterized in that, The detection component (2) further includes a detection bracket (22), which is located above the iron core and has an arc-shaped surface (220) facing the iron core. The inductive proximity switch (21) is connected to the detection bracket (22), and the detection end of the inductive proximity switch (21) is located between the arc-shaped surface (220) and the iron core.

6. The rotor positioning device according to claim 5, characterized in that, The detection bracket (22) is provided with a power supply component for supplying power to the inductive proximity switch (21).

7. The rotor positioning device according to any one of claims 1-6, characterized in that, The driving component (1) includes a positioning motor (11) and a clamping component (12); The clamping member (12) is located on one side of the positioning motor (11). One side of the clamping member (12) is connected to the output shaft of the positioning motor (11), and the other side of the clamping member (12) is used to connect to the rotor to be tested.

8. The rotor positioning device according to claim 7, characterized in that, The clamping member (12) is a cylinder containing a gripper, and the gripper of the clamping member (12) is used to clamp the rotor to be tested.

9. The rotor positioning device according to any one of claims 1-6 and 8, characterized in that, The positioning device also includes a frame (3) for suspending the rotor to be tested. The frame (3) includes a connector (31) and a plurality of parallel support arms (32). One end of each support arm (32) is connected to the connector (31), and the other end is placed on the ground. The drive (1) and the detection component (2) are connected to the connector (31) at intervals.

10. The rotor positioning device according to claim 9, characterized in that, The frame (3) also includes a U-shaped locking component (33); The locking member (33) is fitted around the bottom of the support arm (32) away from the connector (31) and is connected to the support arm (32). The locking member (33) is used to fix it to the ground.

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