Rotor magnet polarity detection device

Abstract

The utility model discloses a rotor magnet polarity detection device, comprising a magnet polarity detection assembly which comprises a rotor supporting seat and an accommodating cavity which is arranged in the rotor supporting seat and is suitable for at least part of a rotor to insert, the plurality of magnet polarity detection components are arranged in the rotor supporting seat and are distributed around the circumferential side of the accommodating cavity at intervals; each magnet polarity detection component is suitable for being in one-to-one correspondence with a magnet on a rotor inserted into the accommodating cavity; and the rotor locking assembly comprises a clamping jaw used for clamping the rotating shaft of the rotor from the upper part of the rotor supporting seat, and a driving structure connected with the clamping jaw and used for driving the clamping jaw to move so as to enable the clamping jaw to be relatively close to and far away from the rotating shaft. According to the utility model, the structure of the whole device is further simplified on the basis of satisfying the magnet polarity detection requirement of the rotor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor processing equipment technical field especially, relates to a rotor magnet polarity detection device. BACKGROUND

[0002] The assembly mode of the magnet on the motor rotor has pre-magnetization assembly and post-magnetization assembly. The pre-magnetization assembly means that the magnet has been magnetized, and the subsequent assembly is on the rotor. The post-magnetization assembly means that the magnet is not magnetized, and the permanent magnet is magnetized after being assembled on the rotor. The post-magnetization assembly is easy to assemble because the magnet has no magnetism, but a special magnetizing machine is needed for subsequent assembly, which requires a large investment and is not suitable for motor models and series with many varieties. The pre-magnetization assembly process is simple, and it is the most common assembly method at present. When the pre-magnetization assembly process is used to assemble the permanent magnet, the polarity of the adjacent two magnets needs to be opposite, that is, the magnets are arranged alternately according to the N-pole and S-pole.

[0003] Whether it is pre-magnetization assembly or post-magnetization assembly, the polarity of the magnet needs to be detected after the magnet and the rotor are assembled in place. The general detection device is a rotor magnet and a rotating mechanism. If the accuracy of the rotating mechanism is wrong, the rotor magnet will still be misaligned, which will affect the performance, vibration and noise of the entire motor.

[0004] To this end, the patent with publication number CN212569098U discloses a motor permanent magnet assembly polarity detection tool, which cooperates with a positioning seat and n detection assemblies. Each detection assembly includes a permanent magnet, a light-emitting module and a driving mechanism. The permanent magnet is installed at one end of the driving mechanism close to the positioning seat. The polarity of the permanent magnet is the same as that of the corresponding permanent magnet on the motor rotor. When the motor rotor is installed in the positioning seat, if the polarity of one permanent magnet on the motor rotor is correctly assembled, the corresponding permanent magnet in the detection assembly is repelled. At this time, the driving mechanism in the detection assembly moves to make the light-emitting module in it emit light in the path. Otherwise, the driving mechanism does not move, and the light-emitting module remains open circuit. Based on the disclosed technology, the polarity of the permanent magnet of the motor rotor can be detected, but each detection assembly needs a driving mechanism, so the structure of the overall device is relatively complex, which not only increases the production cost and use cost of the equipment, but also increases the failure rate of the overall device.

[0005] Therefore, for the polarity detection process of the rotor magnet, on the basis of meeting the detection requirements, how to simplify the structure of the overall device still needs to be further optimized and improved. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a rotor magnet polarity detection device to solve the technical problem of simplifying the overall structure.

[0007] The rotor magnet polarity detection device is achieved in the following manner:

[0008] A rotor magnet polarity detection device comprises:

[0009] The magnet polarity detection assembly comprises a rotor support seat, a receiving cavity adapted for at least partial insertion of the rotor in the rotor support seat, and a plurality of magnet polarity detection components spaced apart around the circumferential side of the receiving cavity in the rotor support seat; each of the magnet polarity detection components is adapted to correspond to a magnet on the rotor inserted in the receiving cavity;

[0010] The rotor locking assembly comprises a jaw for clamping the rotating shaft of the rotor from above the rotor support seat, and a driving structure connected to the jaw for driving the jaw to move to relatively approach and move away from the rotating shaft.

[0011] In the optional implementation of the utility model, the moving direction of the jaw is perpendicular to the axial direction of the rotating shaft.

[0012] In the optional implementation of the utility model, a U-shaped clamping groove for clamping cooperation with the rotating shaft is arranged on the jaw.

[0013] The groove opening of the U-shaped clamping groove is adapted to the outer diameter of the rotating shaft.

[0014] In the optional implementation of the utility model, the driving structure adopts a linear cylinder.

[0015] In the optional implementation of the utility model, the rotor magnet polarity detection device further comprises a positioning magnet arranged on the rotor support seat for positioning the magnet on the rotor; and

[0016] The rotor support seat is provided with a positioning groove adapted for embedding the positioning magnet.

[0017] In the optional implementation of the utility model, the receiving cavity is a cylindrical cavity; and

[0018] The rotor support seat is provided with a plurality of mounting holes for one-to-one fixing of the magnet polarity detection components along the circumferential direction of the receiving cavity.

[0019] In the optional implementation of the utility model, the cavity bottom wall of the receiving cavity is further concave and provided with a shaft positioning hole for accommodating one end of the rotating shaft.

[0020] In the optional implementation of the utility model, the rotor support seat is made of non-metallic material.

[0021] In the optional implementation of the utility model, the rotor magnet polarity detection device further comprises a polarity indicator light matched with each magnet polarity detection component one by one.

[0022] In the optional implementation of the utility model, the rotor magnet polarity detection device further comprises a controller connected with the plurality of magnet polarity detection components; and

[0023] The controller is further connected with the driving structure.

[0024] The utility model discloses a rotor magnet polarity detection device, through the rotor support seat, the magnet polarity detection process of the rotor is positioned initially, and then the rotor is fixed by the rotor locking assembly, so that the unexpected shaking problem of the rotor in the magnet polarity detection process is avoided.Based on this, the polarity of the plurality of magnets in the rotor is detected simultaneously by the plurality of magnet polarity detection components in the rotor support seat, so that the interference of the plurality of magnets on the detection result can be reduced, and the detection efficiency of the detection device is high, which is especially suitable for the use requirement of batch rotor magnet polarity detection, and the accuracy of the detection result is improved, the misjudgment rate of the detection result is reduced, and the overall structure is simple and the failure rate is low. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the overall structure schematic diagram of the rotor magnet polarity detection device of the utility model;

[0026] Figure 2 It is the structure schematic diagram of the rotor locking assembly of the rotor magnet polarity detection device of the utility model;

[0027] Figure 3 It is the structure schematic diagram of the magnet polarity detection assembly of the rotor magnet polarity detection device of the utility model;

[0028] Figure 4 It is the cooperation schematic diagram of the controller and the protective cover of the rotor magnet polarity detection device of the utility model.

[0029] In the drawing: rotor support seat 1, containing cavity 11, mounting hole 12, shaft positioning hole 13, positioning groove 15, claw 2, U-shaped clamping groove 21, support seat body 3, protective cover 4, polarity indicator light 5, sound / light alarm 6, rotor 7, rotating shaft 8, linear cylinder 9, telescopic rod 91, controller 100. DETAILED DESCRIPTION

[0030] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to specific embodiment and in conjunction with the drawings.

[0031] Embodiment 1:

[0032] Referring to Figures 1 to 4 As shown in the drawings, the embodiment provides a rotor magnet polarity detection device, which comprises a magnet polarity detection assembly and a rotor locking assembly used in cooperation. The magnet polarity detection assembly is used not only to detect the polarity of the magnets on the rotor 7, but also to preliminarily fix the rotor 7. The rotor locking assembly is used to further fix the rotor 7 to prevent the rotor 7 from shaking unexpectedly during the detection of the magnet polarity.

[0033] Next, an optional implementation case is taken as an example in combination with the drawings. In detail, first, the magnet polarity detection assembly generally comprises a rotor support seat 1, a receiving cavity 11 provided in the rotor support seat 1 and adapted for at least partial insertion of the rotor 7, and a plurality of magnet polarity detection elements (not shown in the drawings) provided in the rotor support seat 1 and spaced apart around the circumferential side of the receiving cavity 11. Each magnet polarity detection element is adapted to correspond to one magnet on the rotor 7 inserted in the receiving cavity 11.

[0034] On the basis of the above structure, it needs to be pointed out that, in order to avoid the rotor support seat 1 interfering with the stability of the magnetic field of the magnets, the rotor support seat 1 can be made of a non-metal material such as POM, but is not limited thereto.

[0035] Based on the above, more specifically, an optional structure is taken as an example. The receiving cavity 11 is a cylindrical cavity. The rotor support seat 1 is provided with a plurality of mounting holes 12 for one-to-one fixing of the magnet polarity detection elements along the circumferential direction of the receiving cavity 11. Based on this, each magnet polarity detection element extends generally along the radial direction of the receiving cavity 11. Each mounting hole 12 extends from the outer side wall of the rotor support seat 1 to the inner cavity wall of the receiving cavity 11, facilitating the installation of the magnet polarity detection elements and meeting the use requirement of detecting the polarity of the magnets on the rotor 7.

[0036] As for the magnet polarity detection element used in the embodiment, it can be an AHM025 magnetic sensor, for example, but is not limited thereto. The AHM025 magnetic sensor can be used as a magnetic identification sensor. Different indicator lights and different output ends can be used to conveniently identify the S pole and the N pole of the detected magnetic object. The AHM025 magnetic identification sensor has strong reliability due to its extremely low power consumption, excellent response speed, IP67 protection level and excellent anti-interference characteristics. In this regard, the rotor magnet polarity detection device further comprises a polarity indicator light 5 matched with each magnet polarity detection element one-to-one. In this way, the polarity detection condition of the plurality of magnets on the rotor 7 can be directly observed through the polarity indicator light 5 corresponding to each magnet polarity detection element.

[0037] In addition, in order to meet the use requirement of the rotating shaft 8 on the rotor 7, the bottom wall of the accommodating cavity 11 is concave and provided with a shaft positioning hole 13 for accommodating one end of the rotating shaft 8. Based on the structure, the rotor 7 is preliminarily fixed in the accommodating cavity 11.

[0038] Next, the rotor locking assembly will be described, which generally comprises a claw 2 for clamping the rotating shaft 8 of the rotor 7 from above the rotor support seat 1, and a driving structure connected with the claw 2 for driving the claw 2 to move to relatively approach and move away from the rotating shaft 8.

[0039] Based on the above, it needs to be explained that the design of the claw 2 in the embodiment is mainly to achieve further positioning of the rotating shaft 8, so that the rotor 7 cannot appear unexpected shaking in the accommodating cavity 11 under the condition that the rotating shaft 8 is reliably positioned, thereby affecting the accuracy of the magnet detection result. As for the claw 2 here, as long as it is arranged above the rotor support seat 1, it meets the practical requirement of the embodiment. Whether the movement direction of the claw 2 relative to the rotating shaft 8 is parallel to the axial direction of the rotating shaft 8 or perpendicular to the axial direction of the rotating shaft 8, theoretically, it can achieve the fixation of the rotating shaft 8, and the embodiment does not make absolute limitation on this.

[0040] The embodiment only takes the case that the movement direction of the claw 2 is perpendicular to the axial direction of the rotating shaft 8 as an example in combination with the drawings. As an option, the driving structure adopts a linear cylinder 9, the linear cylinder 9 is fixed on a support seat body 3, and the extension rod 91 of the linear cylinder 9 is connected with the claw 2, and the linear motion of the claw 2 is driven by the extension and retraction of the extension rod 91. A U-shaped clamping groove 21 for clamping and cooperating with the rotating shaft 8 is arranged on the claw 2; the groove opening of the U-shaped clamping groove 21 faces the rotating shaft 8, and the groove opening of the U-shaped clamping groove 21 is adapted to the outer diameter of the rotating shaft 8.

[0041] It needs to be explained that the groove opening of the U-shaped clamping groove 21 is slightly larger than the outer diameter of the rotating shaft 8, so that the outer diameter of the rotating shaft 8 can easily enter and exit the U-shaped clamping groove 21, and with the movement of the claw 2, the groove bottom of the U-shaped clamping groove 21 will abut against the rotating shaft 8. For the entire rotating shaft 8, one end has been fixed in the shaft positioning hole 13, and the side wall of the rotating shaft 8 is abutted by the U-shaped clamping groove 21. For the entire rotor 7, it cannot rotate in the accommodating cavity 11 without applying a rotating force, so as to ensure that each magnet on the rotor 7 can reliably correspond to the corresponding magnet polarity detection component, so even if the groove opening of the U-shaped clamping groove 21 is slightly larger than the outer diameter of the rotating shaft 8, it can also meet the use requirement by abutting the side wall of the rotating shaft 8 through the U-shaped clamping groove 21.

[0042] Next, it also needs to be explained that the plurality of magnets on the rotor 7 are arranged alternately with N and S poles, so that each magnet can be directly opposite a magnet polarity detection component, without the interface of two adjacent magnets being directly opposite a magnet polarity detection component, thereby ensuring the reliability and accuracy of the results detected by the magnet polarity detection component. When the rotor 7 is inserted into the accommodation cavity 11, the position of the rotor 7 needs to be adjusted to the appropriate position. For this purpose, the rotor magnet polarity detection device of the present embodiment further comprises a positioning magnet (not shown in the figure) provided on the rotor support seat 1 for positioning the magnets on the rotor 7; and a positioning groove 15 provided on the rotor support seat 1 and adapted for the positioning magnet to be embedded. The stored positioning magnet is not absolutely limited in the present embodiment, whether it is N or S pole. When the positioning magnet is N pole, the same principle of repelling same poles and attracting opposite poles is used. The magnet on the rotor 7 directly opposite the positioning magnet must be S pole to meet the use requirements. If the interface of two adjacent magnets is directly opposite the positioning magnet, the rotor 7 cannot be reliably fixed in the accommodation cavity 11 due to the same magnetism between some magnets and the positioning magnet. Therefore, the design of the positioning magnet can achieve reliable positioning of the magnets on the rotor 7, and can also use the principle of attracting opposite poles to generate a certain magnetic attraction effect between the positioning magnet and the magnets on the rotor 7, thereby reinforcing the stability of the position of the rotor 7 in the accommodation cavity 11.

[0043] In summary, the rotor magnet polarity detection device of the present embodiment has high detection efficiency, is particularly suitable for batch rotor 7 magnet polarity detection, can improve the accuracy of the detection results, thereby reducing the misjudgment rate of the detection results, and has a simple overall structure and low failure rate.

[0044] Embodiment 2:

[0045] Please refer to Figures 1 to 4 As shown in FIG. 1, based on the rotor magnet polarity detection device of embodiment 1, the rotor magnet polarity detection device provided in the present embodiment further comprises a controller 100 connected with the plurality of magnet polarity detection components. The specific model of the controller 100 is not absolutely limited in the present embodiment, and it only needs to be able to receive the detection signals of the plurality of magnet polarity detection components to meet the use requirements of the present embodiment. Based on this, the controller 100 can also be connected with the sound / light alarm 6, so that when the polarity of the rotor 7 magnet is detected and confirmed to have at least one incorrect polarity that needs to be repaired, the controller 100 triggers the sound / light alarm 6 to send an alarm signal and remind the staff to handle it in time. Based on this, in order to protect the controller 100, the controller 100 is built into the protective cover 4.

[0046] On the basis of the above structure, further, the controller 100 of the embodiment is also connected with the driving structure, for example, the controller 100 is electrically connected with the linear cylinder 9, that is, the running state of the linear cylinder 9 can be controlled through the controller 100, based on this condition, when the polarity of the rotor 7 magnet is detected and confirmed that the polarity of all magnets is correct, the controller 100 will automatically unlock the linear cylinder 9, the linear cylinder 9 drives the claw to retract, so that the claw leaves the rotating shaft 8, thereby facilitating the detection of the rotor 7 from the rotor supporting seat 1 to withdraw into the next process. Conversely, when the polarity of the rotor 7 magnet is detected and confirmed that at least one magnet is incorrect and needs to be repaired, the controller 100 will lock the linear cylinder 9, and trigger the sound / light alarm 6 at the same time, and the alarm signal is sent through the sound / light alarm 6, reminding the staff to handle in time.

[0047] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the utility model, and it should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0048] In the description of the utility model, it should be understood that the terms indicating the position or location relationship are based on the position or location relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model.

[0049] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] In the description of the utility model, it is necessary to explain that the directions or position relations indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are the directions or position relations shown based on the drawings, or the directions or position relations commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0052] In the utility model, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature therebetween. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A rotor magnet polarity detection device, characterized by, The application relates to a rotor magnet polarity detection device, which comprises the following components: a magnet polarity detection component, which comprises a rotor supporting seat, a receiving cavity adapted to the insertion of at least part of a rotor in the rotor supporting seat, and a plurality of magnet polarity detection elements distributed around the circumferential side of the receiving cavity in the rotor supporting seat; each of the magnet polarity detection elements is adapted to correspond to a magnet on the rotor inserted in the receiving cavity; a rotor locking component, which comprises a jaw for clamping the rotating shaft of the rotor from above the rotor supporting seat, and a driving structure connected with the jaw for driving the jaw to move to relatively approach and move away from the rotating shaft.

2. The rotor magnet polarity detection apparatus according to claim 1, characterized by, The moving direction of the jaw is perpendicular to the axial direction of the rotating shaft.

3. A rotor magnet polarity detection apparatus according to claim 1 or 2, characterized by A U-shaped clamping groove is arranged on the jaw for clamping cooperation with the rotating shaft. The groove opening of the U-shaped clamping groove is adapted to the outer diameter of the rotating shaft.

4. The rotor magnet polarity detection apparatus according to claim 1 or 2, characterized by The driving structure adopts a linear air cylinder.

5. The rotor magnet polarity detection apparatus of claim 1, wherein The rotor magnet polarity detection device further comprises a positioning magnet arranged on the rotor supporting seat for positioning the magnet on the rotor; and A positioning groove adapted to the embedding of the positioning magnet is arranged on the rotor supporting seat.

6. The rotor magnet polarity detection apparatus of claim 1, wherein The receiving cavity is a cylindrical cavity; and A plurality of mounting holes for one-to-one fixing of the magnet polarity detection elements are arranged on the rotor supporting seat along the circumferential direction of the receiving cavity.

7. The rotor magnet polarity detection apparatus according to claim 1 or 6, characterized by An axial positioning hole for accommodating one end of the rotating shaft is further arranged on the bottom wall of the receiving cavity.

8. The rotor magnet polarity detection apparatus of claim 1, wherein The rotor supporting seat is made of non-metallic material.

9. The rotor magnet polarity detection apparatus of claim 1, wherein The rotor magnet polarity detection device further comprises a polarity indicating lamp matched with each magnet polarity detection element.

10. The rotor magnet polarity detection apparatus according to claim 1 or 9, characterized by, The rotor magnet polarity detection device further comprises a controller connected with the plurality of magnet polarity detection elements; and The controller is further connected with the driving structure.

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