Miniature pin stator

Abstract

The utility model discloses a miniature pin stator, and belongs to the technical field of motor manufacturing. The miniature pin stator comprises a rubber-coated stator, a stator winding and a wiring terminal; the rubber-coated stator comprises a stator core and a plastic framework, and the plastic framework is formed in the stator core through injection molding; a plurality of groups of stator windings are wound on the plastic framework along the circumferential direction; the wiring terminal is inserted into the plastic framework, the wiring terminal extends upwards along the Z-axis, and an outgoing line head of the stator winding is wound on the wiring terminal and is leveled upwards along the Z-axis, so that the outgoing line head is arranged on one side of the wiring terminal in parallel, and the outgoing line head is connected with the wiring terminal in a welding manner. The miniature pin stator can ensure that the wiring terminal is not deformed or damaged, so that the welding appearance is attractive, soldering flux does not need to be added, the wire outlet head does not need to be subjected to skin breaking treatment, the welding effect can be ensured, meanwhile, the structural integrity of the plastic framework after welding can be ensured, and the production cost is not increased.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a miniature pin stator. Background Technology

[0002] In the manufacturing process of miniature pin stators with an outer diameter of less than 36mm, the low height of the plastic skeleton in the miniature pin stator results in low structural strength, and the shallow insertion depth of the terminals within the plastic skeleton makes welding between the stator winding leads and the terminals difficult, leading to low welding efficiency. Furthermore, the long welding time can cause the terminals to become brittle or melt due to prolonged high welding temperatures, resulting in deformation and damage. Additionally, the prolonged high welding temperatures can cause the plastic skeleton to melt, resulting in an unsightly weld and poor welding quality, leading to a high scrap rate for miniature pin stators.

[0003] To solve the above problems, flux is usually added when soldering the wire ends and terminals, but the soldering effect is not ideal. If a plastic skeleton with higher temperature resistance is used, it may cause difficulties in the injection molding of the plastic skeleton and increase the production cost of the miniature pin stator.

[0004] Therefore, a miniature pin stator is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to propose a miniature pin stator that can ensure that the terminals are not deformed or damaged, resulting in a beautiful weld appearance. It does not require the addition of flux or the stripping treatment of the wire ends, thus ensuring the welding effect. At the same time, it can also ensure the structural integrity of the plastic frame after welding, without increasing production costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Miniature pin stator, including:

[0008] A rubber-coated stator includes a stator core and a plastic skeleton, wherein the plastic skeleton is injection molded inside the stator core;

[0009] Stator windings, wherein multiple sets of the stator windings are wound around the plastic skeleton along its circumference;

[0010] A terminal block is inserted into the plastic frame. The terminal block extends upward along the Z-axis. The stator winding lead is wound around the terminal block and leveled upward along the Z-axis so that the lead is placed parallel to one side of the terminal block. The lead is welded to the terminal block.

[0011] As an optional solution, the lead wire is in contact with the terminal block.

[0012] As an optional solution, the welding time between the lead wire and the terminal block shall not exceed two seconds.

[0013] As an optional feature, the length of the lead-out end parallel to the terminal block shall not be less than 50% of the length of the terminal block extending upward along the Z-axis from the plastic skeleton.

[0014] As an optional solution, the number of turns of the lead wire around the terminal block is one or two.

[0015] As an optional solution, the first cross-section at the top end of the outgoing head is flush with the second cross-section at the top end of the terminal block.

[0016] As an optional solution, the first cross section is perpendicular to the central axis of the terminal block, and the first cross section is not wrapped with enameled wire. The first cross section is used for soldering the tin entry point.

[0017] As an optional solution, the welding temperature between the lead-out end and the terminal block is matched with the outer diameter of the stator core and the diameter of the lead-out end.

[0018] As an optional option, the plastic skeleton is made of a material with a temperature lower than the preset temperature resistance temperature.

[0019] As an optional solution, the lead-out head and the terminal block are connected by fluxless wave soldering, immersion soldering, or soldering.

[0020] The beneficial effects of this utility model are as follows:

[0021] The miniature pin stator of this invention uses a plastic skeleton injection-molded inside the stator core. Multiple sets of stator windings are wound around the plastic skeleton circumferentially. The lead-out ends of the stator windings are wound around the terminals and leveled upwards along the Z-axis, ensuring that the lead-out ends are parallel to one side of the terminals. This parallel and leveled arrangement facilitates rapid welding of the lead-out ends to the terminals, making welding simpler and faster, resulting in higher welding efficiency. Furthermore, because rapid welding can shorten the welding time between the lead-out ends and terminals to a certain extent, it avoids... The wire terminals do not become brittle or melt due to prolonged high-temperature welding, so this method ensures that the terminals do not deform or become damaged. At the same time, rapid welding avoids melting of the plastic frame due to high welding temperatures, resulting in a more aesthetically pleasing weld and better welding effect, thus improving the yield rate of miniature pin stators. Furthermore, the welding effect can be guaranteed without adding flux during the welding process. Moreover, the welding effect can be guaranteed without breaking the wire ends. And the use of plastic frames made of higher temperature-resistant materials is not required, ensuring smooth injection molding of the plastic frame. In other words, it can guarantee the structural integrity of the plastic frame after welding without increasing the production cost of miniature pin stators. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the miniature pin stator provided by this utility model (stator windings are not shown, but wire leads are shown, and some wire leads are not shown parallel to the terminals, only the portion wound on the terminals is shown). Figure 1 ;

[0023] Figure 2 yes Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of the miniature pin stator (showing stator windings, but not the wire ends) provided by this utility model. Figure 2 ;

[0025] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1- Rubber-coated stator; 11- Stator core; 12- Plastic frame; 121- Winding slot;

[0028] 2-Stator winding; 21-Outgoing wire; 211-First cross-section;

[0029] 3-Terminal block; 31-Second section. Detailed Implementation

[0030] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features. Throughout this specification, the same reference numerals indicate the same elements.

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment proposes a miniature pin stator and a motor including the miniature pin stator. The outer diameter of the motor is less than 36mm, that is, the miniature pin stator is suitable for use in motors with small outer diameters. The welding process of the miniature pin stator is relatively simple and fast, and the welding appearance and welding effect are good, which can improve the yield of the miniature pin stator without increasing the overall production cost of the miniature pin stator.

[0034] Specifically, such as Figures 1 to 4 As shown, the miniature pin stator includes a rubber-coated stator 1, stator windings 2, and terminals 3. The rubber-coated stator 1 includes a stator core 11 and a plastic frame 12. The plastic frame 12 is injection-molded inside the stator core 11. That is, the stator core 11 is placed in a plastic mold so that the plastic frame 12 can be injection-molded inside the stator core 11 in the plastic mold to form a complete rubber-coated stator 1. Multiple sets of stator windings 2 are wound around the plastic frame 12 circumferentially. One end of the terminal 3 is inserted downward along the Z-axis into the plastic frame 12, and the other end of the terminal 3 extends upward along the Z-axis. The lead-out end 21 of the stator winding 2 is wound around the terminal 3 and leveled upward along the Z-axis so that the lead-out end 21 is parallel to one side of the terminal 3. The lead-out end 21 is welded to the terminal 3.

[0035] Compared to existing technologies, the miniature pin stator in this embodiment, before soldering, has its stator winding 21's lead wire 21 wound around the terminal 3 and leveled upwards along the Z-axis, so that the lead wire 21 is parallel to one side of the terminal 3. By ensuring the parallel and leveled arrangement of the lead wire 21 and the terminal 3, it is easier to quickly solder the lead wire 21 to the terminal 3, making the soldering process simpler and faster, resulting in higher soldering efficiency. Furthermore, since rapid soldering can shorten the soldering time between the lead wire 21 and the terminal 3 to a certain extent, it can prevent the terminal 3 from being damaged by prolonged soldering. The high temperature of welding prevents the plastic frame 12 from becoming brittle or melting, ensuring that the terminal block 3 does not deform or become damaged. At the same time, the rapid welding avoids the melting of the plastic frame 12 due to the high temperature of welding, resulting in a more aesthetically pleasing weld and better welding effect, thus improving the yield of the miniature pin stator. Furthermore, the welding effect can be guaranteed without adding flux during the welding process. In addition, the welding effect can be guaranteed without breaking the wire end 21. Moreover, the use of plastic frame 12 made of higher temperature resistant material is not required, ensuring the smoothness of injection molding of plastic frame 12. That is, it can guarantee the structural integrity of plastic frame 12 after welding, without increasing the production cost of miniature pin stator.

[0036] And, as Figure 2 As shown, by winding the stator winding 2's lead-out end 21 around the terminal 3 and leveling it upwards along the Z-axis, that is, by winding one end of the lead-out end 21 around the terminal 3 and directly welding the other end of the lead-out end 21 parallel to the terminal 3 to the terminal 3, the connection between the lead-out end 21 and the terminal 3 can be ensured through both ends of the lead-out end 21, thus avoiding the problem of the terminal 3 and the lead-out end 21 becoming detached during operation.

[0037] It is worth noting that, such as Figure 2 As shown, the welding between the lead wire 21 and the terminal 3 in this embodiment specifically refers to the welding between the part of the lead wire 21 that is parallel to the terminal 3 and the part of the terminal 3 that extends upward along the Z-axis.

[0038] It is worth noting that the rubber-coated stator 1, stator winding 2, and terminal block 3 in this embodiment are all common structures in existing pin stators. Therefore, the specific working principles of the rubber-coated stator 1, stator winding 2, and terminal block 3 will not be described in detail here. You can refer to the working principles of existing pin stators.

[0039] Specifically, in this embodiment, as Figure 1 , Figure 3 and Figure 4As shown, nine winding slots 121 are arranged circumferentially on the plastic frame 12. A set of stator windings 2 is wound in one winding slot 121 to form nine sets of stator windings 2. Since the miniature pin stator includes three phases, that is, six lead-out heads 21 extend from the nine sets of stator windings 2. Correspondingly, six terminals 3 are inserted into the plastic frame 12. One lead-out head 21 is flush with and parallel to one terminal 3 and soldered. Here, the specific number of winding sets of stator windings 2 and the number of terminals 3 are not limited.

[0040] Furthermore, such as Figure 2 As shown, the lead wire 21 is in contact with the terminal 3. That is, after the lead wire 21 is wound around the terminal 3, the lead wire 21 of each stator winding 2 is leveled upward along the axial direction of the terminal 3, i.e., the Z-axis, by a special clamp to ensure that the lead wire 21 is close to the terminal 3 and parallel to the terminal 3.

[0041] like Figure 2 As shown, by making the lead wire 21 contact and fit snugly with the terminal 3, the distance between the lead wire 21 and the terminal 3 is greatly reduced. On the one hand, this facilitates faster soldering between the lead wire 21 and the terminal 3, improving soldering efficiency. On the other hand, it facilitates soldering the circuit board between the lead wire 21 and the terminal 3, reducing the spacing between solder joints on the circuit board and ensuring a neat appearance of the soldered circuit board. The circuit board can utilize a common circuit board structure found in existing technologies.

[0042] It is worth noting that the specific structure of the special clamp is not limited here, as long as the special clamp can be used to level the wire head 21 to ensure that the wire head 21 is close to the terminal 3 and parallel to the terminal 3.

[0043] In this embodiment, by first aligning the lead wire 21 tightly against and parallel to the terminal 3, and then welding the lead wire 21 to the terminal 3, the welding time between the lead wire 21 and the terminal 3 can be shortened to no more than two seconds. That is, within this welding time of no more than two seconds, the conduction range of the high welding temperature can be greatly reduced, preventing the terminal 3 and the plastic frame 12 from becoming brittle or melting due to prolonged high welding temperatures, thus achieving a better welding effect. Here, the specific structure of the plastic frame 12 is not limited, as long as the stator winding 2 can be wound on the plastic frame 12 and the terminal 3 can be inserted into the plastic frame 12.

[0044] Furthermore, such as Figure 2As shown, the length of the lead wire 21 parallel to the terminal 3 is not less than 50% of the length of the terminal 3 extending upward along the Z-axis from the plastic skeleton 12, so that the length of the lead wire 21 and the length of the terminal 3 are more suitable within the parallel range, thereby better ensuring the rapid welding effect between the lead wire 21 and the terminal 3.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the number of turns of the lead wire 21 around the terminal block 3 is one or two. On the one hand, this ensures that the number of turns of the lead wire 21 around the terminal block 3 is not excessive, thus helping to ensure that the length of the lead wire 21 parallel to the terminal block 3 is not less than 50% of the length of the terminal block 3 extending upwards along the Z-axis from the plastic skeleton 12. On the other hand, by appropriately increasing the number of turns of the lead wire 21 around the terminal block 3, the connection between the lead wire 21 and the terminal block 3 is more stable. In this embodiment, the lead wire 21 is wound around the terminal block 3 two times.

[0046] It is worth noting that, Figure 1 and Figure 2 The number of turns of the lead wire 21 on the terminal 3 shown is only to more clearly illustrate the winding relationship between the lead wire 21 and the terminal 3. Figure 1 and Figure 2 The number shown does not represent the actual number of turns. In this embodiment, the actual number of turns of the lead wire 21 on the terminal 3 is one or two.

[0047] Furthermore, such as Figure 1 and Figure 2 As shown, the first cross-section 211 at the top end of the lead wire 21 and the second cross-section 31 at the top end of the terminal block 3 are set at the same height and flush, so that the first cross-section 211 and the second cross-section 31 at the same height can be quickly welded, thereby better ensuring the rapid welding effect between the lead wire 21 and the terminal block 3. Among them, the first cross-section 211 is a circular cross-section, and correspondingly, the lead wire 21 is a circular lead wire 21; the second cross-section 31 is a square cross-section, and correspondingly, the terminal block 3 is a square post.

[0048] Specifically, such as Figures 1 to 4 As shown, the first section 211 is perpendicular to the central axis of the terminal 3, that is, the first section 211 is perpendicular to the Z-axis, so as to better ensure that the wire outlet 21 and the terminal 3 are set in parallel, thereby better ensuring the parallelism between the wire outlet 21 and the terminal 3.

[0049] Furthermore, such as Figure 1 and Figure 2As shown, the first section 211 is not wrapped with enameled wire, that is, the first section 211 is made of copper. During soldering, the first section 211 is used as the soldering entry point. That is, by using the first section 211 as the initial entry point for soldering, the enameled wire wrapped around the wire head 21 can be quickly removed through the solder. In other words, the wire head 21, which is a complete structure formed by the enameled wire wrapped around the copper wire and the copper wire, no longer needs to be pre-removed from the external enameled wire. This allows for faster soldering of the copper wire inside the wire head 21 to the terminal 3, thus better ensuring the rapid soldering effect between the wire head 21 and the terminal 3.

[0050] Specifically, the welding temperature between the lead-out end 21 and the terminal 3 is matched with the outer diameter of the stator core 11 and the diameter of the lead-out end 21. That is, the welding temperature needs to be adaptively adjusted and determined according to the outer diameter of the stator core 11 and the diameter of the lead-out end 21 to ensure the welding effect between the lead-out end 21 and the terminal 3. Here, the specific value of the welding temperature is not limited.

[0051] Furthermore, the plastic skeleton 12 is made of a material with a temperature lower than the preset temperature resistance. Specifically, the plastic skeleton 12 is made of an engineering plastic material composed of polyamide (PA) 66 and 30% or 40% glass fiber (GF). That is, the plastic skeleton 12 is made of ordinary PA66+30 / 40GF, without the need to use a higher performance temperature-resistant material.

[0052] By using a material with a temperature lower than the preset temperature resistance, the injection molding of the plastic skeleton 12 can be ensured, thereby guaranteeing the smoothness and stability of forming the overmolded stator 1. Furthermore, since a common, inexpensive, temperature-resistant material is used, it will not increase the production cost of the miniature pin stator. The specific value of the preset temperature resistance is not limited here, as long as it ensures that the plastic skeleton 12 is minimally affected by the high welding temperature during the welding time and does not melt.

[0053] Furthermore, the connection between the lead-out terminal 21 and the terminal 3 is achieved through fluxless wave soldering, immersion soldering, or soldering. This ensures that no flux is needed during the soldering process to guarantee the soldering effect, thereby further reducing the overall production cost of the miniature pin stator. In this embodiment, the connection between the lead-out terminal 21 and the terminal 3 is achieved through fluxless immersion soldering. Immersion soldering specifically refers to a soldering method in which the circuit board with installed electronic components is immersed in a solder bath containing molten solder, and solder joints are formed by the contact between the solder and the pads on the circuit board. Here, the specific soldering method between the lead-out terminal 21 and the terminal 3 is not limited.

[0054] In this embodiment, the miniature pin stator has its stator winding 2's lead wire 21 wound around the terminal 3 and leveled upwards along the Z-axis before soldering. This ensures that the lead wire 21 is close to and parallel to the terminal 3, guaranteeing a parallel and level layout between the lead wire 21 and the terminal 3. This also significantly reduces the distance between the lead wire 21 and the terminal 3, allowing for soldering without the need for flux. Furthermore, the first cross-section 211 at the top end of the lead wire 21 serves as the initial entry point for soldering, allowing for rapid removal of the enameled wire covering the lead wire 21. This eliminates the need for any stripping of the lead wire 21, ensuring a good soldering result. This facilitates rapid soldering between the lead wire 21 and the terminal 3, improving soldering efficiency.

[0055] In this embodiment, the miniature pin stator can shorten the welding time between the wire outlet 21 and the terminal 3 by no more than two seconds by flattening the wire outlet 21 before welding. This avoids deformation of the terminal 3 caused by prolonged high welding temperature and also avoids melting of the plastic skeleton 12 by prolonged high welding temperature. In other words, it can ensure the structural integrity of the plastic skeleton 12 after welding, so that the plastic skeleton 12 can be made of ordinary and inexpensive heat-resistant material, thus reducing the overall production cost of the miniature pin stator.

[0056] In this embodiment, the miniature pin stator, by leveling the lead wire 21 before welding, ensures welding effect without the need for flux, further reducing the overall production cost of the miniature pin stator. Furthermore, the lead wire 21 is positioned close to and parallel to the terminal 3, and the first cross-section 211 at the top end of the lead wire 21 is flush with the second cross-section 31 at the top end of the terminal 3. Simultaneously, the lead wire 21 is wound around the terminal 3 one or two times, and the length of the lead wire 21 parallel to the terminal 3 is not less than 50% of the length of the terminal 3 extending upwards along the Z-axis from the plastic skeleton 12. This effectively ensures a fast welding effect and aesthetically pleasing weld between the lead wire 21 and the terminal 3.

[0057] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A miniature pin stator, characterized in that, include: A rubber-coated stator (1) includes a stator core (11) and a plastic skeleton (12), wherein the plastic skeleton (12) is injection molded inside the stator core (11); Stator winding (2), the plastic skeleton (12) is provided with multiple sets of the stator winding (2) around its circumference; The terminal block (3) is inserted into the plastic frame (12). The terminal block (3) extends upward along the Z-axis. The lead end (21) of the stator winding (2) is wound around the terminal block (3) and leveled upward along the Z-axis so that the lead end (21) is placed parallel to one side of the terminal block (3). The lead end (21) is welded to the terminal block (3).

2. The miniature pin stator as described in claim 1, characterized in that, The lead-out head (21) is in contact with the terminal block (3).

3. The miniature pin stator as described in claim 2, characterized in that, The welding time between the lead-out head (21) and the terminal block (3) shall not exceed two seconds.

4. The miniature pin stator as described in claim 1, characterized in that, The length of the lead-out head (21) parallel to the terminal block (3) is not less than 50% of the length of the terminal block (3) extending upward along the Z-axis from the plastic skeleton (12).

5. The miniature pin stator as described in claim 4, characterized in that, The number of turns of the lead wire (21) around the terminal block (3) is one or two.

6. The miniature pin stator as described in any one of claims 1-5, characterized in that, The first section (211) at the top end of the outlet head (21) is flush with the second section (31) at the top end of the terminal block (3).

7. The miniature pin stator as described in claim 6, characterized in that, The first section (211) is perpendicular to the central axis of the terminal (3), and the first section (211) is not wrapped with enameled wire. The first section (211) is used for soldering the tin entry point.

8. The miniature pin stator as described in any one of claims 1-5, characterized in that, The welding temperature between the lead-out head (21) and the terminal (3) is matched with the outer diameter of the stator core (11) and the diameter of the lead-out head (21).

9. The miniature pin stator as described in any one of claims 1-5, characterized in that, The plastic skeleton (12) is made of a material with a temperature lower than the preset temperature resistance.

10. The miniature pin stator as described in any one of claims 1-5, characterized in that, The connection between the lead-out head (21) and the terminal block (3) is achieved by fluxless wave soldering, immersion soldering, or soldering.

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