Wire winding jig and wire winding apparatus for outer-wound stator

Abstract

The present disclosure relates to a winding jig and a winding apparatus for an outer-wound stator in which the outer-wound stator has outer teeth for disposing a winding. The winding jig includes a ring-shaped jig body for fitting around an outer periphery of the stator, and a plurality of inner teeth extending from the jig body radially inward of the jig body, the inner teeth being for winding the winding and being configured to be disposed opposite the outer teeth of the stator when the jig body is fitted around the outer periphery of the stator. With the winding jig according to the present disclosure, it is possible to wind the winding in an inner-wound manner even for the outer-wound stator. This improves the slot fill factor of the winding, and it is possible to achieve continuous winding of the entire winding.

Description

Technical Field

[0001] This disclosure relates to the field of electric motors, and in particular to a winding fixture and winding device for an externally wound stator. Background Technology

[0002] With the development of robotics technology, the demand for miniaturization of robot motion components is increasing, which in turn puts the miniaturization and weight reduction of motors used in robots on the agenda.

[0003] For such motors, winding is a crucial step. Generally, winding is divided into two methods: external winding and internal winding. External winding allows for higher winding speeds, but traditional winding devices cannot achieve high slot fill factor for external stator winding. Furthermore, traditional external winding devices struggle to continuously wind all stator windings, necessitating multiple disassemblies and reassemblies of the winding fixture, resulting in low efficiency.

[0004] Therefore, a winding fixture that can effectively improve slot fill factor and connect all windings is needed. Summary of the Invention

[0005] Accordingly, according to one aspect of the present disclosure, a winding apparatus for an externally wound stator is provided, the externally wound stator having external teeth for placing a winding. The winding fixture includes: an annular fixture body for fitting around the outer periphery of the externally wound stator; and a plurality of internally projecting teeth extending radially inward from the fixture body, the internally projecting teeth being used for winding the winding and configured to be opposite to the external teeth of the externally wound stator when the fixture body is fitted around the outer periphery of the externally wound stator.

[0006] According to one embodiment of the present disclosure, the radially inner end of the inner tooth has a cross-section that tapers radially inward.

[0007] According to one embodiment of the present disclosure, a stop is provided at the radially inner end of the inner tooth.

[0008] According to one embodiment of the present disclosure, the inner tooth has a cavity for receiving a stop member, the stop member being configured as a telescopic stop member and retracting into the cavity when subjected to pressure.

[0009] According to one embodiment of this disclosure, the stop is a spherical, hemispherical, or near-spherical stop.

[0010] According to one embodiment of the present disclosure, a plurality of stop members are provided on the inner convex tooth, wherein one of the plurality of stop members is provided on a first side surface of the inner convex tooth, and another of the plurality of stop members is provided on a second side surface of the inner convex tooth, wherein the second side surface is opposite to the first side surface.

[0011] According to one embodiment of the present disclosure, the winding fixture further includes a plurality of skeletons configured to be detachably mounted on inner protruding teeth, and the windings are wound on the skeletons.

[0012] According to one embodiment of the present disclosure, the skeleton has a first stop and a second stop at each of its two ends, the first stop being used to prevent the winding from falling off, and the second stop being used to abut against the radial inner side of the fixture body.

[0013] According to one embodiment of this disclosure, a plurality of internal protruding teeth are arranged at equal intervals along the circumferential direction of the fixture body.

[0014] According to one embodiment of this disclosure, the number of the plurality of internal protruding teeth is the same as the number of external teeth of the externally wound stator.

[0015] According to one embodiment of the present disclosure, the winding fixture further includes a plurality of blocks that protrude axially upward from the top surface of the fixture body. The blocks are located between two adjacent inner protruding teeth in the circumferential direction and are provided with at least one through hole for the winding needle to pass through.

[0016] According to another aspect of the present disclosure, a winding apparatus is provided, comprising: the aforementioned winding fixture; a winding device adapted to perform winding in an inward winding manner; and a winding removal and installation device adapted to remove the winding from the winding fixture and install it on an outwardly wound stator.

[0017] The winding fixture according to embodiments of the present disclosure enables windings to be wound in an internal winding manner even for externally wound stators. This improves the slot fill factor of the winding and allows for continuous winding of all windings.

[0018] It should be understood that the descriptions in this section are not intended to identify key or essential features of the embodiments of this disclosure, nor are they intended to limit the scope of this disclosure. These and other aspects of this disclosure will become clear from the embodiments described below and will be elucidated with reference to the embodiments described below. Attached Figure Description

[0019] The accompanying drawings exemplify embodiments and form part of the specification, serving to illustrate exemplary implementations of the embodiments together with the textual description. The illustrated embodiments are for illustrative purposes only and do not limit the scope of the claims. Throughout the drawings, the same reference numerals refer to the same elements or similar but not necessarily identical elements.

[0020] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments, wherein: Figure 1 A perspective view of a winding fixture according to an exemplary embodiment of the present disclosure is shown; and Figure 2 It shows Figure 1 A magnified view of region A of the winding fixture.

[0021] Explanation of reference numerals in the attached figures: 100 winding jig 110 Fixture body 111 Stop 120 internal convex teeth 121 Stop component 122 end 130 skeleton 131 First stop Area A. Detailed Implementation

[0022] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Many specific details will be set forth in the following description, which are intended to enable those skilled in the art to gain a more comprehensive and in-depth understanding of the technical solutions and practical application value of the present invention. However, it will be apparent to those skilled in the art that specific implementations of the present invention do not necessarily depend entirely on some or all of these specific details, but can be appropriately adjusted and optimized according to actual application needs and production conditions.

[0023] Furthermore, it should be clearly understood that the scope of protection of this invention is not limited to the specific embodiments described below. Instead, any reasonable combination of the various features and technical elements described below can be considered to implement this invention. Therefore, the technical features, specific embodiments, and resulting technical advantages detailed below are for illustrative and exemplary purposes only and should not be considered as specific elements or limitations of the scope of protection defined in the claims, unless the corresponding technical features or limitations are explicitly and specifically stated in the claims.

[0024] A "winding fixture" is a specialized jig used in the electronic component manufacturing industry for winding coils. Through structural design, it achieves precise positioning, fixing, and guidance of the wires to ensure the accuracy and consistency of the winding process. Wire winding fixtures can be used at least for winding motor coils.

[0025] "External winding" refers to the operation of winding a wire onto the outer surface of a frame, core, or workpiece from the outside. An "externally wound stator" refers to a stator with its teeth and slots facing outwards, and the coil wound on the outer teeth. External winding is commonly used to wind the coil onto an externally wound stator.

[0026] "Internal winding" refers to the operation of winding a wire inside the internal space, internal groove, or hollow structure of a workpiece.

[0027] The winding fixture may include various other auxiliary components to achieve its function, which can be implemented using conventional techniques, and this disclosure does not limit this. In different figures, the same components are indicated by the same reference numerals, and other components are omitted for brevity, but this does not mean that the winding fixture of this disclosure cannot include other components. It should be understood that the dimensions, scale relationships, and number of components in the figures are not intended to limit this disclosure.

[0028] The applicant noted that existing winding fixtures for external windings still suffer from insufficient slot fill factor, making continuous winding impossible. However, these defects become less significant for windings using internal winding. Therefore, the inventors envisioned using an internal winding method to wind external windings. In this case, since conventional winding fixtures for external windings cannot achieve internal winding, the inventors envisioned providing a novel winding fixture for externally wound stators that simulates the form of an internally wound stator, thereby enabling winding of the coil on the winding fixture in an internal winding manner and subsequently mounting the completed winding onto the external teeth of the stator.

[0029] To this end, this disclosure provides a winding fixture suitable for winding in an inward manner.

[0030] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0031] Figure 1 A perspective view of a winding fixture 100 according to an exemplary embodiment of the present disclosure is shown.

[0032] like Figure 1As shown, according to an exemplary embodiment of the present disclosure, the winding fixture 100 includes an annular fixture body 110 for fitting around the outer periphery of a stator. The fixture body 110 has an inner diameter that matches the outer diameter of the stator to which the winding is to be installed, so that the fixture body 110 can be fitted over the stator for subsequent mounting of the completed winding onto the external teeth of the stator. The fixture body 110 can be formed in various forms. For example, the fixture body 110 can be a metal ring (such as an iron ring) and integrally formed by casting. The fixture body 110 can also be, for example, additively manufactured. A clamping portion may additionally be included on the fixture body 110 for engaging the fixture body 110 with a clamping device for transferring the winding fixture 100. A fixing portion may also be included on the fixture body 110 for fixing the winding fixture 100 in a corresponding position on the winding apparatus. The fixture body 110 may also include a stop 111 for fixing the winding needle during winding and guiding the tail wire follow-up hanging mechanism.

[0033] The winding fixture 100 also includes a plurality of inner protruding teeth 120 extending radially inward from the fixture body 110. The inner protruding teeth 120 are used for winding the winding and are configured to face the outer teeth of the stator when the fixture body 110 is fitted onto the outer periphery of the stator, so as to transfer the wound winding onto the outer teeth of the stator. The plurality of inner protruding teeth 120 are used to cooperate with a winding device to wind the winding in an inward manner onto the plurality of inner protruding teeth 120. The winding device can be an existing winding device for inward winding. That is, the plurality of inner protruding teeth 120 simulate the inner teeth of an inwardly wound stator, thereby allowing the winding device to wind the winding on the winding fixture 100 in an inward manner. The plurality of inner protruding teeth 120 can be connected to the fixture body 110 in a suitable manner, either as a non-removable connection (e.g., welding or integral molding) to improve mechanical strength, or as a detachable connection (e.g., plug-in) to adapt the winding fixture 100 to different numbers of teeth. It should be noted that although this disclosure does not limit the maximum number of internal teeth, those skilled in the art will understand that there should be an upper limit to the number of internal teeth so that the gaps between multiple internal teeth are sufficient for the winding device to operate without obstruction. Furthermore, it should be understood that the number of internal teeth should be no less than the number of external teeth of the stator, thereby ensuring that each external tooth corresponds to one internal tooth. For example, in some embodiments, the number of internal teeth is the same as the number of external teeth of the stator on which the winding is to be placed. Alternatively, the number of internal teeth may be twice the number of external teeth of the stator.

[0034] By using a winding fixture that can simulate the winding of a stator in an inward winding manner, the wound winding has a high slot fill factor and can achieve continuous winding between multiple windings.

[0035] According to an exemplary embodiment of this disclosure, a plurality of internal protruding teeth 120 are equally spaced along the circumferential direction of the fixture body 110. In this way, by equally spaced internal protruding teeth 120, the wound winding is also equally spaced, thereby facilitating the removal of the entire winding from the winding fixture 100 at once. Preferably, the winding fixture 100 includes 20 internal protruding teeth.

[0036] According to an exemplary embodiment of this disclosure, a stop 121 is provided at the radially inner end of the inner tooth 120. The stop 121 is used, for example, to prevent the wound portion from detaching from the inner tooth 120 during winding, thereby improving the stability of the winding process. A frame 130 (which will be referred to later) is provided. Figure 2 In the case of (detailed description), the stop 121 is used to stop the skeleton 130 in the radial direction.

[0037] In some embodiments, the inner tooth 120 has a cavity for the stop 121, which is configured as a telescopic stop and retracts into the cavity of the corresponding inner tooth 120 when under pressure. In this way, when it is necessary to remove the already wound winding from the winding fixture 100, the stop 121 will not obstruct the removal of the winding, and in particular, will not affect the winding arrangement of the already wound winding, thereby improving the reliability of the winding fixture. A frame 130 (which will be referred to later) is provided. Figure 2 In the embodiment described in the detailed description, the stop 121 can be at least partially pressed into the cavity of the inner protrusion 120 during the installation of the skeleton 130, and then at least partially protrudes again after installation to achieve the stopping effect, thereby facilitating the installation of the skeleton 130. The stop 121 can be of any shape, such as spherical, hemispherical, near-spherical, or cuboid. The stop 121 can also be detachable, rather than necessarily fixedly connected to the inner protrusion 120. The stop 121 can, for example, be formed in the form of a ball. When it is necessary to install the skeleton 130 or remove the coil, the ball is pressed into the inner protrusion 120, and when the operation is completed, the ball pops out to achieve the stopping function.

[0038] According to exemplary embodiments of the present disclosure, a plurality of internal protrusions 120 have a cubic shape, i.e., have a square or rectangular cross-section, wherein a stop is disposed on at least one side of the cube. It is understood that the side is a face not facing the geometric center of the winding fixture 100, thereby enabling the stop to perform its function. In some embodiments, the four corners of the rectangular or square cross-section are additionally rounded to eliminate all sharp portions of the internal protrusions 120, thereby reducing potential damage to the bobbin 130 and improving winding reliability.

[0039] In some embodiments, multiple stops can be provided on the inner tooth 120 to enhance the stopping effect and improve the stability of the winding fixture 100. For example, two stops, such as two balls, can be provided on one inner tooth 120, one of which is provided on a first side of the inner tooth 120, and the other stop (not shown) is provided on a second side of the inner tooth 120 opposite to the first side. By providing stops on two opposite sides, the restriction on the winding is further strengthened, or in embodiments with a bobbin, the restriction on the bobbin is further strengthened, thereby improving the stability of the winding.

[0040] According to an exemplary embodiment of this disclosure, the winding fixture 100 further includes a plurality of stops 111 protruding axially upward from the top surface of the fixture body 110. The stops 111 are located circumferentially between two adjacent inner protruding teeth and have at least one through hole for the winding needle to pass through. As described above, the stops 111 are used to fix the winding needle during winding and to guide the hanging plate of the starting and ending wire follower hanging mechanism as it passes between the two stops.

[0041] Figure 2 It shows Figure 1 A magnified view of region A of the winding fixture 100.

[0042] like Figure 2 As shown, the radially inner end 122 of the inner tooth 120 has a cross-section that tapers radially inward. End 122 is the portion of the inner tooth 120 near the geometric center of the winding fixture 100. That is, the portion of the inner tooth 120 away from the fixture body 110 is configured to have a gradually tapering cross-section. By providing an end with a gradually tapering cross-section, removing the winding is more convenient, or in embodiments with a bobbin, installing and removing the bobbin 130 is more convenient, avoiding damage to the winding or bobbin 130 by the inner tooth 120.

[0043] According to exemplary embodiments of this disclosure, such as Figure 2 As shown, the winding fixture 100 may include a plurality of bobbins 130 configured to be detachably mounted on a plurality of internal protrusions 120 and / or on the external teeth of an externally wound stator, wherein the winding can be wound internally onto the bobbins 130. Figure 2As shown, the skeleton 130 is hollow, and the size of the hollow cavity of the skeleton 130 can be slightly larger than the size of the inner protruding tooth 120, thereby facilitating the fitting of the skeleton 130 onto the inner protruding tooth 120. Furthermore, the size of the hollow cavity of the skeleton 130 can be slightly larger than the size of the stator outer tooth, thereby facilitating the fitting of the wound skeleton 130 onto the stator outer tooth after the winding is completed. The skeleton 130 has a first retaining edge and a second retaining edge at each end. The first retaining edge 131 is used to prevent the winding from falling off, and the second retaining edge is used to abut against the radially inner surface of the fixture body 110. The size of the second retaining edge can be larger than the size of the first retaining edge 131. The skeleton 130 is also suitable for use with other devices to remove the winding and the skeleton 130 as a whole from the winding fixture 100 and install them into the externally wound stator.

[0044] As previously described, the inner protruding tooth 120 has a telescopic stop 121. During the installation of the frame 130, the stop 121 is at least partially pressed into the cavity of the inner protruding tooth 120, and after the frame 130 is in place, the stop 121 at least partially pops out to achieve the stopping effect. Figure 2 In the embodiment shown, after the skeleton 130 is installed in place, the stop 121 only partially pops out and abuts against the inner wall of the hollow cavity of the skeleton 130, and applies pressure to the inner wall of the skeleton 130, thereby stopping the skeleton 130 at that position.

[0045] According to an exemplary embodiment of this disclosure, the number of the plurality of internal teeth 120 is the same as the number of external teeth of the stator on which the winding is to be placed. The gap between each pair of adjacent bobbins 130 can be designed according to the outer diameter of the guide pin of the winding device for guiding the wire, so that the guide pin can pass through the gap to wind the wire.

[0046] By using a winding fixture according to an exemplary embodiment of the present disclosure, it is possible to wind windings for externally wound stators in an inward manner, so that even for externally wound stators, the advantages of inward winding can be achieved, such as high slot fill factor and continuous winding of all windings.

[0047] According to exemplary embodiments of the present disclosure, a winding apparatus is also provided, comprising the winding fixture 100 described above; a winding device adapted to perform inward winding; and a winding removal and installation device adapted to remove the winding from the winding fixture 100 and install it on an outwardly wound stator. By using a winding apparatus incorporating the winding fixture of the present disclosure, a winding wound in an inward manner is installed on an outwardly wound stator, improving the slot fill factor and enabling continuous winding between different windings.

[0048] It should be understood that in this specification, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "installation," etc., should be interpreted broadly. For example, they can refer to an installation connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0050] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] Although this disclosure has been described and illustrated in detail in the accompanying drawings and the foregoing description, such description and illustration should be considered illustrative and suggestive, not restrictive; this disclosure is not limited to the disclosed embodiments. By studying the drawings, the disclosure, and the appended claims, those skilled in the art will be able to understand and implement variations of the disclosed embodiments in practice with respect to the claimed subject matter. In the claims, the word "comprising" does not exclude other elements or steps not listed, the indefinite article "a" or "an" does not exclude a plurality, the term "a plurality" means two or more, and the term "based on" should be interpreted as "at least partially based on". The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be beneficial.

Claims

1. A winding fixture for an externally wound stator, said externally wound stator having external teeth for placing the winding, characterized in that, The winding fixture includes: An annular fixture body is used to fit around the outer periphery of the externally wound stator; and A plurality of internal protruding teeth extend radially inward from the fixture body, the internal protruding teeth being used to wind the winding and being configured to be opposite to the external teeth of the externally wound stator when the fixture body is fitted onto the outer periphery of the externally wound stator.

2. The winding fixture according to claim 1, characterized in that, The radially inner end of the inner tooth has a cross-section that tapers radially inward.

3. The winding fixture according to claim 1, characterized in that, A stop is provided at the end of the inner radial side of the inner tooth.

4. The winding fixture according to claim 3, characterized in that, The inner protruding tooth has a cavity for accommodating the stop member, which is configured as a telescopic stop member and retracts into the cavity when subjected to pressure.

5. The winding fixture according to claim 4, characterized in that, The stop is a spherical, hemispherical, or near-spherical stop.

6. The winding fixture according to claim 3, characterized in that, Multiple stop members are provided on the inner convex tooth, wherein one of the multiple stop members is provided on the first side surface of the inner convex tooth, and another of the multiple stop members is provided on the second side surface of the inner convex tooth, wherein the second side surface is opposite to the first side surface.

7. The winding fixture according to any one of claims 1 to 6, characterized in that, The winding fixture also includes multiple skeletons configured to be detachably mounted on the inner teeth, and the windings are wound on the skeletons.

8. The winding fixture according to claim 7, characterized in that, The frame has a first stop and a second stop at each of its two ends. The first stop is used to prevent the winding from falling off, and the second stop is used to abut against the radial inner surface of the fixture body.

9. The winding fixture according to any one of claims 1 to 6, characterized in that, The plurality of internal protruding teeth are arranged at equal intervals along the circumference of the fixture body.

10. The winding fixture according to any one of claims 1 to 6, characterized in that, The number of the plurality of internal convex teeth is the same as the number of external teeth of the externally wound stator.

11. The winding fixture according to any one of claims 1 to 6, characterized in that, The winding fixture also includes a plurality of blocks that protrude axially upward from the top surface of the fixture body. The blocks are located between two adjacent inner protruding teeth in the circumferential direction and are provided with at least one through hole for the winding needle to pass through.

12. A winding device, characterized in that, The winding device includes: The winding fixture according to any one of claims 1 to 11; A winding device, the winding device being adapted to wind wire in an inward winding manner; and A winding removal and installation device adapted to remove the winding from the winding fixture and install it on an externally wound stator.

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