A device for checking the position of a magnet on a rotor of an electric machine

Abstract

The utility model relates to motor rotor production field especially relates to a kind of checking device for motor rotor magnetic steel position, including cylinder piece, the cylinder piece end part is equipped with several measurement teeth;Several the measurement teeth are arranged along the annular arrangement of the cylinder piece, the measurement tooth is arranged along the axial extension of the cylinder piece;The rotating shaft of motor rotor can pass through the cylinder piece, the measurement tooth can be inserted the gap of adjacent magnetic steel, the measurement tooth can be butted with magnetic steel, after motor rotor is well pasted magnetic steel, by making the rotating shaft of motor rotor pass through cylinder piece, rotating cylinder piece makes measurement tooth butt magnetic steel side, by respectively checking whether each measurement tooth is all with magnetic steel side butt, if all measurement tooth can butt magnetic steel, then judge magnetic steel pasting position normal;If there is measurement tooth cannot butt magnetic steel, then judge magnetic steel pasting position exists deviation, need to re-paste, in this way, whether magnetic steel application position meets the requirement can be detected quickly.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor manufacturing, and in particular to a device for checking the position of motor rotor magnets. Background Technology

[0002] In the mass production of permanent magnet motors, after the rotor core is fitted with magnets (usually 10-20 pieces per rotor), the positional accuracy of the magnets must be confirmed. Current processes typically involve manually measuring the distance from the rotor shoulder to the end face of each magnet using handheld vernier calipers. Each magnet must be individually positioned, read, and recorded. Due to the large number of magnets and the need to ensure consistent circumferential spacing between them, this method has the following shortcomings: Low efficiency: The full inspection time of a single rotor increases linearly with the number of magnets, making it difficult to meet batch cycle time requirements; Consistency cannot be quantified: Vernier calipers can only measure the absolute axial dimension of a single magnet and cannot directly give the circumferential spacing between adjacent magnets. In terms of process, visual inspection is the only option, and the results are affected by personnel experience, perspective and lighting conditions, so the error is uncontrollable. High labor intensity: Repeated positioning and reading operations can easily cause staff fatigue, further amplifying measurement errors.

[0003] Therefore, existing testing methods have gradually become a bottleneck restricting the consistency of production capacity and quality in a mass production environment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies in which the position of the magnets on the motor rotor is difficult to detect quickly, and to provide a device for checking the position of the magnets on the motor rotor.

[0005] This utility model provides a device for checking the position of the rotor magnet of an electric motor, comprising: A cylindrical component, wherein the end of the cylindrical component is provided with a plurality of measuring teeth; A plurality of the measuring teeth are arranged circumferentially along the cylindrical component, and the measuring teeth are extended axially along the cylindrical component; The rotor shaft of the motor can pass through the cylindrical component, the measuring teeth can be inserted into the gap between adjacent magnets, and the measuring teeth can abut against the magnets. Preferably, the number of measuring teeth is the same as the number of gaps.

[0006] Preferably, the measuring tooth is an arc-shaped component, and the measuring tooth is adapted to be embedded in the gap.

[0007] Preferably, the cylindrical component has an annular step inside, and the side of the annular step near the magnet has a reference surface, which is used to abut against the end face of the motor rotor, and the shaft of the motor rotor passes through the annular step.

[0008] Preferably, the length of the motor rotor is one-third the length of the magnet.

[0009] Preferably, the cylindrical component is provided with an annular component, which is coaxially arranged with the cylindrical component and rotatably connected to the cylindrical component. The annular component is provided with a plurality of adjusting teeth, which can overlap with the measuring teeth. The annular component is provided with a limiting component, which can abut against the cylindrical component.

[0010] Preferably, the limiting member includes a limiting bolt that passes through the annular member, the limiting bolt being threadedly connected to the annular member, and the limiting bolt being able to abut against the cylindrical member.

[0011] Preferably, the annular component has several scale lines, and the cylindrical component has a zero scale, which can be aligned with the scale lines.

[0012] Preferably, both the cylindrical component and the measuring teeth are austenitic stainless steel components.

[0013] Preferably, the cylindrical component and the measuring tooth are integrally formed structural components.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a device for checking the position of magnets on a motor rotor. After the magnets are attached to the motor rotor, the rotor shaft passes through a cylindrical component, and the cylindrical component is rotated to make the measuring teeth abut against the side of the magnet. By checking whether each measuring tooth abuts against the side of the magnet, if all measuring teeth can abut against the magnet, the magnet is judged to be attached correctly; if some measuring teeth cannot abut against the magnet, the magnet is judged to be misaligned and needs to be reattached. In this way, the magnet placement can be quickly detected to ensure that it meets the requirements, which has good economic and practical value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a device for checking the position of motor rotor magnets according to the present invention; Figure 2 This is a top view schematic diagram of a device for checking the position of motor rotor magnets according to the present invention; Figure 3 This is a front view schematic diagram of a device for checking the position of motor rotor magnets according to the present invention; Figure 4 This is an installation diagram of a device for checking the position of motor rotor magnets according to the present invention; Figure 5 This is a schematic diagram showing the usage state of a device for checking the position of motor rotor magnets according to the present invention; Figure 6 This is a schematic diagram of the structure of a device for checking the position of motor rotor magnets according to Embodiment 2 of this utility model.

[0016] Marked in the image: 1-Cylindrical component, 2-Measuring teeth, 3-Annular step, 31-Reference surface, 4-Annular component, 41-Adjusting teeth, 5-Limiting component, 6-Scale line, 7-Zero scale. 100 - Motor rotor, 101 - Magnet, 102 - Gap. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0018] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0020] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0021] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0022] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0023] Example 1 like Figures 1-5 As shown, a device for checking the position of motor rotor magnets is specifically a cylindrical component 1. A plurality of measuring teeth 2 are provided on the end face of the cylindrical component 1, and the measuring teeth 2 are connected to the end of the cylindrical component 1. The plurality of measuring teeth 2 are arranged circumferentially along the cylindrical component 1, and the measuring teeth 2 extend axially along the cylindrical component 1. The rotating shaft of the motor rotor 100 passes through the cylindrical component 1, and the measuring teeth 2 can be inserted into the gap 102 between adjacent magnets 101, and the measuring teeth 2 can abut against the magnets 101. Specifically, the number of measuring teeth 2 is the same as the number of gaps 102, and the spacing between adjacent measuring teeth 2 is equal.

[0024] After the magnet 101 is attached to the motor rotor 100, the shaft of the motor rotor 100 is passed through the cylindrical part 1. The cylindrical part 1 is rotated so that the measuring teeth 2 abut against the side of the magnet 101. By checking whether each measuring tooth 2 abuts against the side of the magnet 101, if all measuring teeth 2 can abut against the magnet 101, it is determined that the magnet 101 is attached in the correct position. If there are measuring teeth 2 that cannot abut against the magnet 101, it is determined that the magnet 101 is misaligned and needs to be reattached. In this way, it is possible to quickly detect whether the magnet 101 is attached in the correct position.

[0025] In one or more embodiments, the number of measuring teeth 2 is consistent with the number of gaps 102 between the motor rotor magnets. One measuring tooth 2 is inserted into each gap 102. In use, the cylindrical part 1 is pushed so that the measuring teeth 2 abut against the side of the magnet 101. By observing whether there is a gap between each measuring tooth 2 and the magnet 101, the operator can quickly determine whether the spacing between adjacent magnets 101 is consistent.

[0026] In an optional embodiment, the measuring tooth 2 is an arc-shaped part. The measuring tooth 2 is adapted to fit the gap 102 of the magnet 101 embedded in the motor rotor 100. The inner diameter of the measuring tooth 2 is equal to the shoulder diameter, and the outer diameter of the measuring tooth 2 is the sum of the shoulder diameter and the thickness of the magnet 101. The width of the measuring tooth 2 is consistent with the theoretical spacing of the magnet 101, so that the measuring tooth 2 fits into the gap 102. When there is a situation where the measuring magnet cannot be inserted into the gap 102, it can be determined that there is an offset in the position of the magnet 101.

[0027] In one or more embodiments, the cylindrical component 1 is provided with an annular step 3. The annular step 3 is provided with a reference surface 31 on the side near the magnet 101. The reference surface 31 is used to abut against the end face of the motor rotor 100. The shaft of the motor rotor 100 passes through the hollow part of the annular step 3. The reference surface 31 abuts against the shoulder end face of the motor rotor 100 as a reference for judging the relative position of the magnet 101 and the shoulder end face. If there is a gap 102 between the magnet 101 and the cylindrical component 1 after the reference surface 31 abuts against the shoulder end face, it can be judged that the placement position of the magnet 101 is offset. Or, if the reference surface 31 cannot abut against the shoulder end face after the magnet 101 abuts against the cylindrical component 1, it can be judged that the placement position of the magnet 101 is offset.

[0028] In one or more embodiments, the length of the motor rotor 100 is one-third the length of the magnet 101 for ease of use.

[0029] In one or more embodiments, both the cylindrical component 1 and the measuring tooth 2 are austenitic stainless steel components. The austenitic stainless steel is mainly 304 stainless steel or 316 stainless steel. Austenitic stainless steel has weak magnetic attraction, which can prevent the magnet 101 from being attracted and facilitates picking and placing.

[0030] In one or more embodiments, the cylindrical component 1 and the measuring tooth 2 are integrally formed structural components with good structural strength.

[0031] Example 2 like Figure 6 The device shown is for checking the position of the rotor magnet of a motor. Its structure is roughly the same as that of Embodiment 1. The difference from Embodiment 1 is that the outer wall of the cylindrical part 1 is provided with an annular part 4. The annular part 4 is coaxially arranged with the cylindrical part 1 and rotatably connected to the cylindrical part 1. The annular part 4 is provided with a plurality of adjusting teeth 41. The adjusting teeth 41 can be stacked with the measuring teeth 2. By rotating the adjusting teeth 41, the width can be changed, thereby adapting to the inspection of different gap 102 widths. The annular part 4 is provided with a limiting part 5. The limiting part 5 fixes the relative position of the cylindrical part 1 and the annular part 4. The limiting part 5 can abut against the cylindrical part 1.

[0032] In an optional embodiment, the limiting member 5 includes a limiting bolt that passes through the annular member 4, the limiting bolt being threadedly connected to the annular member 4, and the limiting bolt being able to abut against the cylindrical member 1.

[0033] In an optional embodiment, the annular part 4 is provided with several scale lines 6, and the cylindrical part 1 is provided with a zero scale 7. The zero scale 7 and the scale lines 6 can be aligned. By observing the relative position between the scale lines 6 and the zero scale 7, the width of the measured gap 102 can be determined, which is convenient for operators to adjust.

[0034] 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 device for checking the position of motor rotor magnets, characterized in that, include: A cylindrical component (1) having a plurality of measuring teeth (2) at its end; A plurality of the measuring teeth (2) are arranged circumferentially along the cylindrical member (1), and the measuring teeth (2) extend axially along the cylindrical member (1); The shaft of the motor rotor (100) can pass through the cylindrical part (1), the measuring tooth (2) can be inserted into the gap (102) of the adjacent magnet (101), and the measuring tooth (2) can abut against the magnet (101).

2. The device for checking the position of motor rotor magnets according to claim 1, characterized in that, The number of measuring teeth (2) is the same as the number of gaps (102).

3. The device for checking the position of motor rotor magnets according to claim 2, characterized in that, The measuring tooth (2) is an arc-shaped part, and the measuring tooth (2) is adapted to be embedded in the gap (102).

4. The device for checking the position of motor rotor magnets according to claim 1, characterized in that, The cylindrical component (1) is provided with an annular step (3). The annular step (3) is provided with a reference surface (31) on the side near the magnet (101). The reference surface (31) is used to abut against the end face of the motor rotor (100). The shaft of the motor rotor (100) passes through the annular step (3).

5. The device for checking the position of motor rotor magnets according to claim 1, characterized in that, The length of the motor rotor (100) is one-third the length of the magnet (101).

6. The device for checking the position of motor rotor magnets according to claim 1, characterized in that, The cylindrical component (1) is provided with an annular component (4), which is coaxially arranged with the cylindrical component (1) and rotatably connected to the cylindrical component (1). The annular component (4) is provided with a plurality of adjusting teeth (41), which can overlap with the measuring teeth (2). The annular component (4) is provided with a limiting component (5), which can abut against the cylindrical component (1).

7. The device for checking the position of motor rotor magnets according to claim 6, characterized in that, The limiting member (5) includes a limiting bolt that passes through the annular member (4), the limiting bolt being threadedly connected to the annular member (4), and the limiting bolt being able to abut against the cylindrical member (1).

8. The device for checking the position of motor rotor magnets according to claim 6, characterized in that, The annular part (4) is provided with several scale lines (6), and the cylindrical part (1) is provided with a zero scale (7). The zero scale (7) can be aligned with the scale lines (6).

9. A device for checking the position of motor rotor magnets according to claim 1, characterized in that, Both the cylindrical component (1) and the measuring tooth (2) are austenitic stainless steel components.

10. A device for checking the position of a motor rotor magnet according to any one of claims 1-9, characterized in that, The cylindrical component (1) and the measuring tooth (2) are integrally formed structural components.

Images