Shielding structure and motor
By designing limiting and locking components in the shielding structure, the problem of the light guide plate being easily crushed is solved, ensuring the stability and lifespan of the motor, suppressing electromagnetic interference, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520188128.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-05
AI Technical Summary
The light guide plate in the shielding structure is prone to cracking under pressure, increasing the maintenance cost during the use of the motor.
A shielding structure was designed in which the dimension of the limiting member along the axial direction of the shielding structure is larger than that of the light guide. The cooperation between the limiting member and the housing assembly prevents the light guide from being directly squeezed by the housing during thermal expansion. Locking members and sealing rings are used to ensure the stability and sealing of the light guide.
This reduces the possibility of the light guide being squeezed and cracked, improves the stability and service life of the motor, and at the same time suppresses external electromagnetic interference and reduces maintenance costs.
Smart Images
Figure CN223785896U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motor technology, and in particular to a shielding structure and a motor. Background Technology
[0002] To facilitate observation of the motor's operating status, some motors have a light guide plate installed in the shielding structure to transmit indicator light signals.
[0003] However, in related technologies, the light guide plates between the shielding structures are prone to cracking under pressure, increasing the maintenance costs during motor use. Utility Model Content
[0004] This application provides a shielding structure and a motor to reduce the possibility of light guide components being damaged by the housing assembly.
[0005] This application provides a shielding structure, including:
[0006] The housing assembly includes a first metal housing and a second metal housing;
[0007] A light guide is disposed between the first metal housing and the second metal housing;
[0008] A limiting member is inserted into the light guide and abuts between the first metal shell and the second metal shell. The dimension of the limiting member along the axial direction of the shielding structure is larger than the dimension of the light guide along the axial direction of the shielding structure.
[0009] In some possible implementations, the limiting member is electrically connected to the first metal housing and the second metal housing, respectively.
[0010] In some possible implementations, the shielding structure further includes a plurality of locking members connected between the first metal housing and the second metal housing and passing through the light guide member, the plurality of locking members being distributed along the periphery of the housing assembly;
[0011] Each of the locking components is fitted with a limiting component around its periphery.
[0012] In some possible implementations, the light guide has an assembly hole extending axially along the shielding structure, and the limiting member passes through the assembly hole and is spaced apart from the inner wall of the assembly hole.
[0013] In some possible implementations, the shielding structure includes a limit expansion state, wherein when the shielding structure is in the limit expansion state, the gap width between the limiting member and the inner wall of the mounting hole is greater than or equal to zero.
[0014] In some possible implementations, the limiting member has one side facing the inner wall of the mounting hole and the inner wall of the mounting hole, one of which has an annular limiting groove, and the other has an annular limiting protrusion, the limiting protrusion being inserted into the limiting groove.
[0015] In some possible implementations, the limiting member has a limiting groove on the side facing the inner wall of the assembly hole, and a limiting protrusion is provided on the inner wall of the assembly hole, the limiting protrusion being inserted into the limiting groove.
[0016] In some possible implementations, the size of the limiting groove is larger than the size of the limiting protrusion along the axial direction of the shielding structure.
[0017] In some possible implementations, the side surface of the limiting protrusion facing the first metal housing and the side surface of the limiting protrusion facing the second metal housing are both arc surfaces.
[0018] In addition, this application also provides an electric motor, including the shielding structure provided in the above embodiments.
[0019] The beneficial effects of this application are as follows: In the shielding structure provided by this application, the dimension of the limiting member along the axial direction of the shielding structure is larger than that of the light guide member along the axial direction of the shielding structure. When the shielding structure expands due to heat, it can prevent the first metal shell and the second metal shell from directly squeezing the light guide member, reducing the possibility of the light guide member being squeezed by the first metal shell and the second metal shell, and reducing the possibility of the light guide member cracking due to squeezing. Furthermore, it can ensure the stability of the motor during use, reduce the maintenance costs during the later use of the motor, and extend the service life of the motor. At the same time, it allows the light guide member to exist between the first metal shell and the second metal shell, while also serving as the outer metal shielding cavity, effectively suppressing the interference of external electric fields, magnetic fields, or electromagnetic fields on the circuit board in the motor, or preventing the electromagnetic field inside the circuit board in the motor from affecting the outside world. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A three-dimensional structural schematic diagram of the shielding structure in some embodiments is shown;
[0022] Figure 2 Cross-sectional structural schematic diagrams of the shielding structure in some embodiments are shown;
[0023] Figure 3 It shows Figure 2 A magnified schematic diagram of part A in the middle section;
[0024] Figure 4 Exploded structural diagrams of the shielding structure in some embodiments are shown;
[0025] Figure 5 Another cross-sectional structural schematic diagram of the shielding structure in some embodiments is shown;
[0026] Figure 6 It shows Figure 5 A magnified schematic diagram of part B in the middle section.
[0027] Explanation of key component symbols:
[0028] 1000 - Shielding structure;
[0029] 100 - Housing assembly; 110 - First metal housing; 120 - Second metal housing;
[0030] 200 - Light guide; 201 - Receiving cavity; 210 - Light guide body; 211 - Assembly hole; 212 - First embedding groove; 213 - Second embedding groove; 214 - Limiting protrusion; 220 - First positioning flange; 230 - Second positioning flange;
[0031] 300 - Limiting component; 310 - Limiting groove;
[0032] 400 - Circuit Board;
[0033] 500 - Locking component;
[0034] 610 - First sealing ring; 620 - Second sealing ring. Detailed Implementation
[0035] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0037] Furthermore, 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 number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical 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 application according to the specific circumstances.
[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0040] like Figure 1 and Figure 2 As shown, the embodiment provides a shielding structure 1000 that can be applied to a motor.
[0041] In some embodiments, the shielding structure 1000 may include a housing assembly 100, a light guide 200, and a limiting member 300.
[0042] The housing assembly 100 includes a first metal housing 110 and a second metal housing 120 disposed opposite to each other. It is understood that the first metal housing 110 and the second metal housing 120 may be part of the housing in the motor. The light guide 200 may be disposed between the first metal housing 110 and the second metal housing 120.
[0043] In this embodiment, the limiting member 300 may be inserted through the light guide 200 along the axial direction of the shielding structure 1000, and the limiting member 300 may abut between the first metal housing 110 and the second metal housing 120. Furthermore, the dimension of the limiting member 300 along the axial direction of the shielding structure 1000 may be larger than the dimension of the light guide 200 along the axial direction of the shielding structure 1000. The axial direction of the shielding structure 1000 may refer to a direction parallel to the extension direction of the axis L.
[0044] Therefore, when the shielding structure 1000 expands due to heat, it can prevent the first metal shell 110 and the second metal shell 120 from directly squeezing the light guide 200, reducing the possibility of the light guide 200 being squeezed by the first metal shell 110 and the second metal shell 120, and reducing the possibility of the light guide 200 cracking due to squeezing. This, in turn, ensures the stability of the motor during use, reduces maintenance costs during later use, and extends the service life of the motor. Simultaneously, it allows the first metal shell 110 and the second metal shell 120 to simultaneously function as a metal shielding cavity while the light guide 200 is present, effectively suppressing interference from external electric fields, magnetic fields, or electromagnetic fields on the circuit board 400 in the motor, or preventing the electromagnetic field within the circuit board 400 in the motor from affecting the outside world.
[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the first metal housing 110 and the second metal housing 120 can be fixedly connected by a locking member 500. When the locking member 500 is connected to the first metal housing 110 and the second metal housing 120, the locking member 500 can pass through the light guide 200 and limit the light guide 200 between the first metal housing 110 and the second metal housing 120, thereby realizing the assembly between the light guide 200 and the housing assembly 100.
[0046] In some embodiments, the locking member 500 may be a screw. That is, the first metal housing 110 and the second metal housing 120 may be fixedly connected by screws. Alternatively, the locking member 500 may be made of metal and may be electrically connected to the first metal housing 110 and the second metal housing 120 respectively. Thus, the first metal housing 110 and the second metal housing 120 may also be electrically connected via the locking member 500.
[0047] In some embodiments, the cross-sectional shape of the housing assembly 100 perpendicular to the axial direction of the shielding structure 1000 may be quadrilateral. The shielding structure 1000 may include four locking members 500, which may be disposed at the four corners of the housing assembly 100 and connected between the first metal housing 110 and the second metal housing 120.
[0048] In other embodiments, the housing assembly 100 may also include three, five, or six locking members 500. The locking members 500 may be distributed circumferentially along the housing assembly 100, and each locking member 500 is connected between the first metal housing 110 and the second metal housing 120.
[0049] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the light guide 200 may have a quadrilateral annular structure that matches the shape of the housing assembly 100. Accordingly, a receiving cavity 201 may be formed inside the light guide 200.
[0050] In this embodiment, the shielding structure 1000 further includes a circuit board 400, which can be disposed in the receiving cavity 201 of the light guide 200. The circuit board 400 can be fixedly connected to the second metal housing 120 by means of screws or other methods, allowing the circuit board 400 to be fixedly disposed relative to the housing assembly 100. Additionally, the circuit board 400 can also be electrically connected to the second metal housing 120 by screws.
[0051] In this embodiment, the circuit board 400 may integrate an indicator light (not shown) for displaying the motor's operating status. The light emitted by the indicator light can be transmitted outward through the light guide 200, allowing the user to clearly understand the motor's operating status.
[0052] In some embodiments, the shielding structure 1000 may include four limiting members 300. The four limiting members 300 may be distributed at the four corners of the light guide 200, and the limiting members 300 may be sleeved around the locking member 500 at their respective positions.
[0053] In other embodiments, the shielding structure 1000 may also include three, five, or six limiting members 300, and the number of limiting members 300 may be equal to the number of locking members 500. When the shielding structure 1000 includes multiple limiting members 300, the multiple limiting members 300 may be fitted one-to-one around the periphery of the multiple locking members 500.
[0054] In some embodiments, the limiting member 300 may be a metal limiting member. The limiting member 300 may be electrically connected to the first metal housing 110 and the second metal housing 120 respectively. During use, the housing assembly 100 may be grounded. This increases the electrical contact area between the first metal housing 110 and the second metal housing 120, improves the electrical contact effect, and forms a path with minimal grounding impedance. This allows external electrical fast transient bursts, surges, electrostatic discharge, and other interference signals to be grounded and discharged nearby, thus protecting the internal circuitry of the circuit board 400 and the entire motor. It also forms a path with minimal return current for interference signals, reducing electromagnetic conduction interference generated by the internal circuitry of the circuit board 400. In addition, by setting the light guide 200 in the housing assembly 100 to guide light, a nearly closed shielding cavity can be formed around the circuit board 400. This effectively suppresses the influence of external electromagnetic fields on the operation of the circuit board 400, reduces electromagnetic radiation interference generated by the internal circuitry of the circuit board 400, and does not require significant modifications to the original structure and appearance of the motor, making it suitable for practical use.
[0055] like Figures 4 to 6 As shown, in some embodiments, the light guide 200 may include an integral light guide body 210, a first positioning flange 220, and a second positioning flange 230. The light guide body 210, the first positioning flange 220, and the second positioning flange 230 are all annular structures. The first positioning flange 220 protrudes from the side of the light guide body 210 facing the first metal housing 110. The second positioning flange 230 protrudes from the side of the light guide body 210 facing the second metal housing 120.
[0056] In this embodiment, the first positioning flange 220 can be inserted into the first metal housing 110. The side of the first positioning flange 220 facing away from the circuit board 400 can fit against the inner wall of the periphery of the first metal housing 110. This allows for the positioning and installation of the light guide 200 and the first metal housing 110, and also improves assembly efficiency.
[0057] The second positioning flange 230 can be inserted into the second metal housing 120, and the side of the second positioning flange 230 facing away from the circuit board 400 can fit against the inner wall of the periphery of the second metal housing 120. Thus, the positioning and installation between the light guide 200 and the second metal housing 120 can be realized, and the assembly efficiency can also be improved.
[0058] In some embodiments, the shielding structure 1000 further includes a first sealing ring 610 and a second sealing ring 620. The first sealing ring 610 is compressibly disposed between the light guide body 210 and the first metal housing 110. This achieves a seal at the connection point between the light guide 200 and the first metal housing 110, providing a waterproof seal. In some embodiments, a first embedding groove 212 may be formed on the side of the light guide body 210 facing the first metal housing 110. The first embedding groove 212 may be surrounding the side of the first positioning flange 220 facing away from the circuit board 400. The first sealing ring 610 may be embedded in the first embedding groove 212 and may protrude relative to the side of the first embedding groove 212 facing the first metal housing 110. This prevents the first sealing ring 610 from moving freely between the first metal housing 110 and the light guide 200, improving the sealing effect.
[0059] The second sealing ring 620 is compressibly disposed between the light guide body 210 and the second metal housing 120. This achieves a seal at the connection point between the light guide 200 and the second metal housing 120, providing a waterproof seal. In some embodiments, a second embedding groove 213 may be formed on the side of the light guide body 210 facing the second metal housing 120. The second embedding groove 213 may be arranged around the side of the second positioning flange 230 facing away from the circuit board 400. The second sealing ring 620 may be embedded in the second embedding groove 213 and may protrude relative to the side of the second embedding groove 213 facing the second metal housing 120. This prevents the second sealing ring 620 from moving freely between the second metal housing 120 and the light guide 200, improving the sealing effect.
[0060] In this embodiment of the application, under the action of the first sealing ring 610 and the second sealing ring 620, the light guide 200 can be centered and limited in the axial direction of the shielding structure 1000, preventing the light guide 200 from swaying freely between the first metal housing 110 and the second metal housing 120, so that the light guide 200 is relatively fixed between the first metal housing 110 and the second metal housing 120.
[0061] like Figures 1 to 3 As shown, in some embodiments, the light guide body 210 may have an assembly hole 211 at each of the four corners corresponding to the light guide 200. The limiting member 300 may be inserted into the assembly hole 211, and the locking member 500 may pass through the limiting member 300.
[0062] In some embodiments, the limiting member 300 may be spaced apart from the inner wall of the mounting hole 211, that is, a gap may be provided between the side surface of the limiting member 300 facing away from the locking member 500 and the inner wall of the mounting hole 211. This reduces the possibility of the limiting member 300 causing crush damage to the light guide 200 when the shielding structure 1000 expands due to heat. In other words, the gap between the limiting member 300 and the inner wall of the mounting hole 211 provides clearance for the thermal expansion of both the limiting member 300 and the light guide 200.
[0063] In some embodiments, the shielding structure 1000 may have a limit expansion state. When the shielding structure 1000 is in the limit expansion state, the gap width between the limiting member 300 and the inner wall of the mounting hole 211 may be greater than or equal to zero.
[0064] Exemplarily, in some embodiments, the shielding structure 1000 can operate within a temperature range of -40°C to 100°C. When the shielding structure 1000 operates at 100°C, it can be in a state of extreme expansion, and each structural component within the shielding structure 1000 can expand due to heat, reaching its maximum expansion volume. The gap width between the peripheral surface of the limiting member 300 and the inner wall of the mounting hole 211 is greater than or equal to zero. Therefore, when the shielding structure 1000 operates at any permissible temperature, it can ensure that the limiting member 300 will not cause extrusion damage to the light guide 200, reducing the later maintenance costs of the shielding structure 1000 and extending its service life.
[0065] In some embodiments, an annular limiting protrusion 214 protrudes from the inner wall of the mounting hole 211 facing the limiting member 300. The limiting protrusion 214 can surround the central axis of the mounting hole 211 for one circumference. The limiting member 300 can have a limiting groove 310 opposite to the limiting protrusion 214 on the inner wall of the mounting hole 211. The limiting groove 310 can surround the central axis of the mounting hole 211 for one circumference and has an annular structure. In the embodiments, the limiting protrusion 214 can be inserted into the limiting groove 310. Thus, the limiting member 300 can be prevented from arbitrarily disengaging from the mounting hole 211 along the axial direction of the shielding structure 1000.
[0066] In other embodiments, the limiting protrusion 214 may protrude from the side of the limiting member 300 facing the inner wall of the mounting hole 211. The limiting groove 310 may be formed in the inner wall of the mounting hole 211.
[0067] In some embodiments, the size of the limiting groove 310 along the axial direction of the shielding structure 1000 may be larger than the size of the limiting protrusion 214. This provides clearance for the expansion of the shielding structure 1000, reducing the possibility of the light guide 200 being damaged by the limiting member 300.
[0068] Furthermore, the side of the limiting protrusion 214 facing away from the receiving cavity 201 can be spaced apart from the side surface of the limiting groove 310 facing the receiving cavity 201. This provides clearance space for the expansion of the shielding structure 1000, reducing the possibility of the light guide 200 being damaged by the limiting member 300.
[0069] In some embodiments, the side surface of the limiting protrusion 214 facing the first metal housing 110 and the side surface of the limiting protrusion 214 facing the second metal housing 120 are both arc surfaces. Thus, when assembling the shielding structure 1000, the limiting member 300 can be easily pressed into the assembly hole 211, so that the limiting protrusion 214 can smoothly enter the limiting groove 310.
[0070] In the shielding structure 1000 provided in this application, the size of the limiting member 300 is larger than the size of the light guide member 200 in the axial direction of the shielding structure 1000, and the light guide member 200 can be centrally limited by the first sealing ring 610 and the second sealing ring 620. Thus, corresponding gaps can be generated between the light guide member 200 and the first metal shell 110 and between the light guide member 200 and the second metal shell 120, which can provide sufficient space for the thermal expansion of the shielding structure 1000 and reduce the risk of the light guide member 200 cracking due to the compression of the first metal shell 110 and the second metal shell 120.
[0071] The embodiment also provides a motor, which may include a motor body and a shielding structure 1000 provided in the embodiment.
[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0073] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A shielding structure, characterized in that, include: The housing assembly includes a first metal housing and a second metal housing; A light guide is disposed between the first metal housing and the second metal housing; A limiting member is inserted into the light guide and abuts between the first metal shell and the second metal shell. The dimension of the limiting member along the axial direction of the shielding structure is larger than the dimension of the light guide along the axial direction of the shielding structure.
2. The shielding structure according to claim 1, characterized in that, The limiting member is electrically connected to the first metal shell and the second metal shell respectively.
3. The shielding structure according to claim 2, characterized in that, The shielding structure also includes a plurality of locking members, which are connected between the first metal housing and the second metal housing and pass through the light guide. The plurality of locking members are distributed along the periphery of the housing assembly. Each of the locking components is fitted with a limiting component around its periphery.
4. The shielding structure according to claim 1, characterized in that, The light guide has an assembly hole extending axially along the shielding structure, and the limiting member passes through the assembly hole and is spaced apart from the inner wall of the assembly hole.
5. The shielding structure according to claim 4, characterized in that, The shielding structure includes a limit expansion state. When the shielding structure is in the limit expansion state, the gap width between the limiting member and the inner wall of the assembly hole is greater than or equal to zero.
6. The shielding structure according to claim 4 or 5, characterized in that, The limiting member has one side facing the inner wall of the assembly hole and the inner wall of the assembly hole, one of which has an annular limiting groove, and the other has an annular limiting protrusion, the limiting protrusion being inserted into the limiting groove.
7. The shielding structure according to claim 6, characterized in that, The limiting member has a limiting groove on the side facing the inner wall of the assembly hole, and a limiting protrusion is provided on the inner wall of the assembly hole, the limiting protrusion being inserted into the limiting groove.
8. The shielding structure according to claim 6, characterized in that, Along the axial direction of the shielding structure, the size of the limiting groove is larger than the size of the limiting protrusion.
9. The shielding structure according to claim 6, characterized in that, The side surface of the limiting protrusion facing the first metal shell and the side surface of the limiting protrusion facing the second metal shell are both arc surfaces.
10. An electric motor, characterized in that, Includes the shielding structure as described in any one of claims 1 to 9.