Press fitting device for motor magnetic steel

Abstract

The utility model relates to a press fitting device for motor magnetic steel, which comprises a guide die, a driving mechanism and a guide block, and is characterized in that the guide die is provided with a guide groove matched with the magnetic steel, and the position of the guide groove corresponds to the position of a magnetic steel groove; the driving mechanism is used for driving the magnetic steel in the press-fitting direction; the guide block is used for bearing the magnetic steel and is in limiting fit with the guide mold so as to limit deflection of the guide block in the thickness direction of the magnetic steel. According to the technical scheme, the magnetic steel can be kept in a vertically-downward posture in the press fitting process, due to the existence of the guide block, the elastic piece is in a bent state when making contact with the magnetic steel, scratching between the magnetic steel and the elastic piece can be reduced or even avoided, meanwhile, due to the fact that the posture of the magnetic steel does not incline due to force change, the magnetic steel can be prevented from being damaged, and the service life of the magnetic steel is prolonged. And rubbing between the magnetic steel and the inner wall of the magnetic steel groove can be avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular to a press-fitting device for motor magnets. Background Art

[0002] The continuously increasing rotational speed, torque density, and power density of the drive motors of new energy vehicles have put forward higher requirements for the magnets of permanent magnet synchronous motors. Generally, a corrosion-resistant coating is applied to the surface of the motor magnets. Taking the rotor core as an example, shrapnel is usually arranged in the magnet slots of the motor rotor to facilitate the fixation or pre-fixation of the magnets. In the related art, when the magnet is press-fitted, the shrapnel or the magnet slot is likely to rub against the surface of the magnet, resulting in the peeling off of the magnet coating, which affects the corrosion resistance of the magnet. The peeled-off coating also affects the cleanliness of the rotor, and in severe cases, it will cause the rotor material to be scrapped. Summary of the Utility Model

[0003] To overcome the problems existing in the related art, the present disclosure provides a press-fitting device for motor magnets.

[0004] According to an embodiment of the present disclosure, there is provided a press-fitting device for motor magnets, which is adapted to press-fit a magnet into a magnet slot of a motor rotating member. The press-fitting device includes:

[0005] A guiding die, which is provided with a guiding groove adapted to the magnet, and the position of the guiding groove corresponds to the position of the magnet slot;

[0006] A driving mechanism for driving the magnet in the press-fitting direction; and

[0007] A guiding block for supporting the magnet, wherein the guiding block is in limit cooperation with the guiding die to limit the deflection of the guiding block in the thickness direction of the magnet.

[0008] Optionally, a first limiting structure is provided on the guiding block, and a second limiting structure is provided on the guiding die and is adapted to the first limiting structure.

[0009] Optionally, the first limiting structure includes a protrusion provided on the guiding block, and the second limiting structure includes a slot provided on the guiding die and communicating with the guiding groove.

[0010] Optionally, guiding strips are provided at the ends of the guiding block along the length direction of the magnet, the guiding strips form the protrusions, and the guiding strips extend along the press-fitting direction of the magnet and the extension length is greater than the thickness of the guiding die.

[0011] Optionally, the guiding strip is arranged at one end of the guiding block, and the cross-section of the guiding strip is rectangular. The slot is a rectangular groove, and the slot includes two limiting surfaces on both sides in the thickness direction of the magnetic steel.

[0012] Optionally, the guiding block and the guiding strip are constructed as an integral part.

[0013] Optionally, a chamfer is arranged along the bottom side edge of the guiding block.

[0014] Optionally, a plurality of guiding grooves are formed in the guiding die, and the driving mechanism is provided with a plurality of driving parts. The number and the inclination angle in the horizontal direction of the driving parts correspond to the plurality of guiding grooves.

[0015] Optionally, the guiding die is provided with mounting holes, and the positions of the mounting holes correspond to the shaft holes of the rotating member of the motor.

[0016] Optionally, the rotating member of the motor is a motor rotor.

[0017] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: For the press-fitting device of the motor magnetic steel provided by the present disclosure, by arranging the guiding block and making the guiding block and the guiding die be in a limiting fit, the deflection of the guiding block in the thickness direction of the magnetic steel is restricted. Since the guiding block does not deflect in the thickness direction of the magnetic steel during the press-fitting process, the magnetic steel supported thereon can maintain a vertically downward posture during the press-fitting process. And during the press-fitting process, the guiding block first contacts and bends the elastic piece in the magnetic steel groove, which makes the elastic piece already in a bent state when it contacts the magnetic steel subsequently, avoiding the process of the magnetic steel being subjected to the change of the force from vertical to horizontal by the elastic piece, thereby reducing or even avoiding the rubbing between the magnetic steel and the elastic piece. At the same time, since the posture of the magnetic steel does not tilt due to the change of the force, the rubbing between the magnetic steel and the inner wall of the magnetic steel groove can also be avoided.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0019] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments conforming to the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0020] Figure 1 is a schematic diagram of a press-fitting device for a motor magnetic steel shown according to an exemplary embodiment.

[0021] Figure 2 is a schematic diagram of a press-fitting system for a motor magnetic steel shown according to an exemplary embodiment.

[0022] Figure 3 It is an assembly of a guiding block and a guiding strip shown according to an exemplary embodiment.

[0023] Figure 4 It is a partial enlarged view of a guiding groove and a slot shown according to an exemplary embodiment.

[0024] Figure 5 It is a schematic diagram of the magnetic steel press-fitting process in the related art shown according to an exemplary embodiment.

[0025] Description of Reference Numerals

[0026] 1 - Magnetic steel, 2 - Motor rotating member, 21 - Magnetic steel groove, 22 - Shaft hole, 23 - Elastic sheet, 3 - Guiding die, 31 - Guiding groove, 32 - Second limiting structure, 321 - Slot, 322 - Limiting surface, 33 - Mounting hole, 4 - Driving mechanism, 41 - Driving part, 5 - Guiding block, 6 - Guiding strip, 61 - First limiting structure. Detailed Embodiment

[0027] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] As Figure 1 and Figure 2 shown, the exemplary embodiment of the present disclosure provides a press-fitting device for a motor magnetic steel, which is suitable for press-fitting the magnetic steel 1 into the magnetic steel groove 21 of the motor rotating member 2. The press-fitting device for the motor magnetic steel is suitable for the assembly of a permanent magnet motor, and the motor rotating member 2 includes a motor rotor and / or a motor stator. For the convenience of description, in the following embodiments, the press-fitting of the rotor core magnetic steel is taken as an example to introduce the present disclosure in detail.

[0029] The press-fitting device includes a guiding die 3, a driving mechanism 4, and a guiding block 5. Among them, the guiding die 3 is provided with a guiding groove 31 that cooperates with the magnetic steel 1, and the position of the guiding groove 31 corresponds to the position of the magnetic steel groove 21. The driving mechanism 4 is used to drive the magnetic steel 1 in the press-fitting direction. The guiding block 5 is used to support the magnetic steel 1, and the guiding block 5 is in limit cooperation with the guiding die 3 to limit the deflection of the guiding block 5 in the thickness direction of the magnetic steel 1.

[0030] The guiding die 3 can be configured as a disc shape similar to the punching sheet of the rotor core, and an installation hole 33 for the rotating shaft to pass through is arranged at the center of the circle, so as to facilitate the installation and positioning during press-fitting. The guiding groove 31 plays a role in guiding the press-fitting. Specifically, the position of the guiding groove 31 is aligned with the position of the magnet groove 21, so that the magnet 1 can be accurately press-fitted into the magnet groove 21. The alignment here means that the length, width dimensions and the horizontal inclination angle of the guiding groove 31 are substantially the same as those of the magnet groove 21, and the degree of approximation is such that it does not affect the accurate press-fitting of the magnet 1.

[0031] The driving mechanism 4 is used to drive the magnet 1 in the press-fitting direction. For example, the driving mechanism 4 can include a plate or a rod that can push the magnet 1 under the drive of a driving motor. When press-fitting the magnet 1, first fix the guiding die 3 and the rotor core together, where the installation hole 33 of the guiding die 3 corresponds to the shaft hole 22 on the rotor core, and make the position of the guiding groove 31 correspond to the position of the magnet groove 21. The driving mechanism 4 drives the magnet 1 to be press-fitted into the magnet groove 21 after being guided and corrected by the guiding groove 31. After the press-fitting is completed, separate the rotor core and the guiding die 3, and then the guiding block 5 can be removed for recycling.

[0032] Figure 5 Shown is the magnet press-fitting process in the related art. In order to fix or pre-fix the magnet 1, elastic pieces 23 can be arranged on the inner wall of the magnet groove 21. When the magnet 1 is pressed into the magnet groove 21, the elastic pieces 23 are bent, so that the magnet 1 is fixed or pre-fixed in the magnet groove 21 under the action of the elastic force of the elastic pieces 23. However, during the process of pressing the magnet 1, or when it is subjected to the transformation process of the elastic pieces 23 from the vertical (pressing direction) to the horizontal acting force, this force transformation process will generate a large scraping force on the surface of the magnet 1 plated with a protective layer, resulting in the peeling off of the coating and affecting the service life of the magnet 1. At the same time, under the action of the elastic force of the elastic pieces 23, the magnet 1 deflects and contacts the inner wall of the magnet groove 21, which is also likely to cause the peeling off of the coating.

[0033] Considering the above technical problems, the press-fitting device for the motor magnet provided by the present disclosure further includes a guiding block 5 for supporting the magnet 1. The guiding block 5 is configured to be able to be in limit cooperation with the guiding die 3 to limit the deflection of the guiding block 5 in the thickness direction of the magnet 1. It should be noted that the deflection here includes the deflection in the horizontal direction and the deflection in the vertical direction.

[0034] The magnet steel 1 is supported on the guiding block 5. In fact, the guiding block 5 can be regarded as a guiding bracket, and the press-fitting guidance of the magnet steel 1 is realized by the cooperation of the guiding block 5 and the guiding die 3. Since the aforementioned rubbing occurs on the two side surfaces in the thickness direction of the magnet steel 1, by restricting the deflection of the guiding block 5 in the thickness direction of the magnet steel 1, that is, it can be restricted that the guiding block 5 enters the guide groove 31 and the magnet steel groove 21 in a vertically downward posture, thereby ensuring the vertically downward posture of the magnet steel 1 supported thereon. This is beneficial to reducing costs by reducing the processing accuracy of the guide groove 31, etc. and the press-fitting debugging.

[0035] And different from Figure 5 in the press-fitting process, since the guiding block 5 is supported on the bottom of the magnet steel 1, during the press-fitting process, the guiding block 5 will contact the elastic piece 23 and bend the elastic piece 23 prior to the magnet steel 1. This makes the elastic piece 23 already in a bent state when it subsequently contacts the magnet steel 1, avoiding the process of the elastic piece 23 changing from a vertical to a horizontal acting force on the magnet steel 1. The surface of the magnet steel 1 will no longer be subjected to a vertical acting force, thereby reducing or even avoiding rubbing against the elastic piece 23. At the same time, since the posture of the magnet steel 1 does not tilt due to the change of force, it can also avoid rubbing between the magnet steel 1 and the inner wall of the magnet steel groove 21.

[0036] As Figure 1 shown, a first limiting structure 61 can be provided on the guiding block 5, and the guiding die 3 can be provided with a second limiting structure 32 that cooperates with the first limiting structure 61. That is, the restriction of the deflection of the guiding block 5 in the thickness direction of the magnet steel 1 is realized through the cooperation between the first limiting structure 61 and the second limiting structure 32.

[0037] The present disclosure does not aim to limit the specific implementation manners of the first limiting structure 61 and the second limiting structure 32. In some embodiments, the first limiting structure 61 includes a protrusion provided on the guiding block 5, and the second limiting structure 32 includes a slot 321 provided on the guiding die 3 and communicating with the guide groove 31. In some other embodiments, the first limiting structure 61 can also be configured to include the slot 321, and the second limiting structure 32 can be configured to include a protrusion. This kind of structure is a limiting structure with a plug-in fit, which has a simple structure and reliable limiting cooperation.

[0038] At the same time, referring to Figure 3 and Figure 4, at the end of the guiding block 5 along the length direction of the magnet 1, a guiding strip 6 can be provided, and the guiding strip 6 is formed as a protrusion. Among them, the guiding strip 6 extends along the pressing direction of the magnet 1 and the extension length is greater than the thickness of the guiding die 3. That is, in some of these embodiments, a protrusion is formed by adding the guiding strip 6. Optionally, the guiding block 5 and the guiding strip 6 can be constructed as an integral part, which is beneficial to improving the structural strength of the combination of the guiding block 5 and the guiding strip 6. The guiding strip 6 is arranged at the end of the guiding block 5 along the length direction of the magnet 1, and the guiding strip 6 can be configured to correspond to the position of the liquid cooling channel communicated with the magnet slot 21 on the rotor core, so that there is no need to additionally provide a hole for accommodating the guiding strip 6 on the rotor core. And making the length of the guiding strip 6 extending along the pressing direction of the magnet 1 greater than the thickness of the guiding die 3 enables the guiding strip 6 to provide a sufficient limiting and mating length for pressing the magnet 1 into the magnet slot 21. In some other embodiments, in addition to forming a protrusion by adding the guiding strip 6, the protrusion part can also be processed by additive or subtractive methods when processing the guiding block 5, and the present disclosure will not elaborate on this again.

[0039] In some embodiments, continue to refer to Figure 3 and Figure 4 , the guiding strip 6 is arranged at one end of the guiding block 5, and the cross-section of the guiding strip 6 is rectangular, the slot 321 is a rectangular groove, and the slot 321 includes two limiting surfaces 322 on both sides along the thickness direction of the magnet 1, and the limiting surfaces 322 are parallel and in clearance fit with the two side walls of the guiding block 5 along the thickness direction of the magnet 1. These two limiting surfaces 322 limit the deflection of the guiding block 5 on both sides in the thickness direction of the magnet 1. In some other embodiments, guiding strips 6 can also be arranged at both ends of the guiding block 5.

[0040] In addition, a chamfer can be provided along the bottom side edge of the guiding block 5, and the chamfer can play a guiding role, which is beneficial to improving the pre-installation speed of the guiding block 5, and further improving the pressing efficiency of the magnet 1.

[0041] As Figure 1 and Figure 2 shown, in some embodiments, a plurality of guide grooves 31 can be formed on the guiding die 3, the driving mechanism 4 is provided with a plurality of driving members 41, and the number and the inclination angle in the horizontal direction of the plurality of driving members 41 can both correspond to the plurality of guide grooves 31. That is, the driving mechanism 4 correspondingly configures a driving member 41 for each guide groove 31. It can be seen from the figure that there are a plurality of guide grooves 31 (or magnet slots 21), and at least some of the plurality of guide grooves 31 can have different length and width dimensions, and the plurality of guide grooves 31 are arranged at an angle. In this way, a driving member 41 is configured for each guide groove 31, which can improve the pressing efficiency of the magnet 1, and all the magnets 1 can be pressed by one periodic drive of the driving mechanism 4.

[0042] In the foregoing detailed description, reference has been made to the accompanying drawings, in which specific aspects in which the present disclosure may be practiced are shown by way of illustration. In this regard, directional or positional relationship-indicating terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. may be used with reference to the orientation of the described figures. Since the components of the described devices may be positioned in a number of different orientations, the directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects may be utilized and structural or logical changes may be made without departing from the concepts of the present disclosure. Accordingly, the following detailed description should not be taken in a limiting sense.

[0043] It should be understood that, unless otherwise specifically stated, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more thereof; similarly, "at least one of..." includes any one of the related listed items and any combination of any two or more thereof.

[0044] It should be understood that, unless otherwise expressly specified and limited, the terms "engage", "attach", "mount", "connect", "couple", "fix", etc. used in the embodiments of the present disclosure should be construed broadly. For example, it may be a fixed connection, a detachable connection, or integral; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific circumstances.

[0045] In addition, the word "above" used in connection with a component, element, or layer of material formed "above" or located "above" a surface may be used herein to mean that the component, element, or layer of material is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or layer of material. However, the word "above" used in connection with a component, element, or layer of material formed "above" or located "above" a surface may also optionally have a specific meaning: the component, element, or layer of material is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0046] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer, or section from another. Thus, the first component, part, region, layer, or section mentioned in the examples described herein may also be referred to as the second component, part, region, layer, or section without departing from the teachings of the various examples. Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description herein, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] It should be understood that spatial relative terms, such as "above", "upper", "below", and "lower", are used herein to describe the relationship of one element shown in the figures to another element. In addition to the orientation depicted in the figures, such spatial relative terms are also intended to encompass different orientations of the device during use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to that other element. Thus, the term "above" encompasses both the above and below orientations depending on the spatial orientation of the device. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0048] Furthermore, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as being advantageous as compared to other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified, or clear from the context, "X applies A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies A; X applies B; or X applies both A and B, then "X applies A or B" is satisfied under any of the foregoing instances. Additionally, unless otherwise specified or clear from the context referring to the singular form, the articles "a" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0049] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. Specifically with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. Additionally, although a particular feature of the present disclosure may have been disclosed with respect to only one of several implementations, such a feature may, as may be desired and advantageous for any given or particular application, be combined with one or more other features of other implementations. Further, with respect to the use of "comprising," "having," "including," "containing," or variants thereof in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "including."

[0050] Other embodiments of the present disclosure will readily occur to those of ordinary skill in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known or customary techniques in the art that are not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0051] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A press-fitting device for a motor magnet is adapted to press-fit a magnet into a magnet groove of a motor rotating member, and is characterized in that, The press-fitting device includes: a guiding die, which is provided with a guiding groove matching with the magnet, and the position of the guiding groove corresponds to the position of the magnet groove; a driving mechanism for driving the magnet in the press-fitting direction; and a guiding block for supporting the magnet, wherein the guiding block is in limit fit with the guiding die to limit the deflection of the guiding block in the thickness direction of the magnet.

2. The press-fitting device for the motor magnet according to claim 1, wherein, A first limiting structure is arranged on the guiding block, and a second limiting structure matching with the first limiting structure is arranged on the guiding die.

3. The press-fitting device for the motor magnet according to claim 2, wherein, The first limiting structure includes a protrusion arranged on the guiding block, and the second limiting structure includes a slot arranged on the guiding die and communicated with the guiding groove.

4. The press-fitting device for the motor magnet according to claim 3, characterized in that, A guiding strip is arranged at the end of the guiding block along the length direction of the magnet, the guiding strip forms the protrusion, and the guiding strip extends along the press-fitting direction of the magnet and the extension length is greater than the thickness of the guiding die.

5. The press-fitting device for the motor magnet according to claim 4, characterized in that The guiding strip is arranged at one end of the guiding block, and the cross section of the guiding strip is rectangular, the slot is a rectangular slot, and the slot includes two limiting surfaces on both sides along the thickness direction of the magnet.

6. The press-fitting device for the motor magnet according to claim 4, characterized in that, The guiding block and the guiding strip are constructed as an integral part.

7. The press-fitting device for the motor permanent magnet according to claim 1, characterized in that, A chamfer is arranged on the bottom side edge of the guiding block.

8. The press-fitting device for the motor permanent magnet according to claim 1, characterized in that, A plurality of guiding grooves are arranged on the guiding die, the driving mechanism is provided with a plurality of driving parts, and the number and the horizontal inclination angle of the driving parts correspond to the plurality of guiding grooves respectively.

9. The press-fitting device for the motor permanent magnet according to claim 1, characterized in that, The guiding die is provided with a mounting hole, and the position of the mounting hole corresponds to the shaft hole of the motor rotating component.

10. The press-fitting device for the motor magnet according to claim 1, characterized in that, The motor rotating component is a motor rotor.

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