Grounding structure of injection molding motor
By setting fisheye needles at both ends of the grounding pin and connecting with the iron core and PCB board, the problem of insufficient grounding reliability in the injection molding motor is solved, and the stable connection of the grounding pin in the vibration environment is achieved to ensure that the grounding does not fail.
Patent Information
- Application Number
- CN202422310578.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The grounding reliability and connectivity of the grounding pins in existing injection molded motors are insufficient, resulting in easy failure of the grounding.
Set fish-eye needles at both ends of the grounding needle, and connect them with the interference fit of the fish-eye needle to the iron core and the PCB board through the fish-eye needle to enhance the close contact between the grounding needle and the iron core and the PCB board, and use the elastic arm of the fish-eye needle to maintain a stable connection under vibration.
It improves the connection firmness and stability of the grounding pin, ensures that the grounding pin is not prone to failure in the vibration environment, and improves the reliability of grounding.
Smart Images
Figure CN223230645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor grounding, and in particular to an injection-molded motor grounding structure. Background Art
[0002] The grounding of the injection molding motor is a necessary measure to improve the safety of the motor. At present, there are two main ways to ground the motor. One way is as follows: Figure 3 As shown, the iron core 1 and the grounding pin 3 are hard-connected. Another method is to connect the iron core and the grounding pin by injection molding.
[0003] In the first method, after a period of use, due to the vibration between the iron core and the grounding pin, the connectivity between the iron core and the grounding pin decreases, which may lead to the risk of grounding failure.
[0004] In the second method, since the iron core and the grounding pin cannot be accurately positioned during the injection molding process, the positions of the iron core and the grounding pin may deviate, resulting in poor contact between the iron core 1 and the grounding pin 3, and thus the risk of grounding failure. Utility Model Content
[0005] The technical problem to be solved by the present invention is that the grounding reliability and connectivity of the grounding pin in the existing injection molding motor are insufficient, resulting in frequent grounding failure. In order to overcome the above defects of the existing technology, the present invention provides a grounding pin with fisheye needle heads at both ends, and the two ends are stably connected to the iron core and the PCB board respectively, thereby improving the grounding reliability and connectivity of the grounding pin, thereby ensuring that the grounding pin will not fail.
[0006] In order to achieve the purpose of this utility model, the following technical solutions are adopted:
[0007] An injection-molded motor grounding structure includes an iron core, a PCB, and a grounding pin; the PCB is mounted above the iron core; a first fisheye pinhead and a second fisheye pinhead are provided at the upper and lower ends of the grounding pin, respectively; the grounding pin is vertically connected between the iron core and the PCB, with the first fisheye pinhead connected to the PCB; and the second fisheye pinhead connected to the iron core. The fisheye pinheads at both ends of the grounding pin, coupled with their mating connection, ensure that the upper end of the grounding pin is in tight contact with the PCB, and the lower end of the grounding pin is in tight contact with the iron core, thereby enhancing the firmness and stability of the grounding pin connection and preventing grounding failure.
[0008] Preferably, the first and second fisheye needle tips are each provided with a horizontally extending fisheye hole in the middle thereof; and first and second elastic arms are formed on either side of the fisheye hole, respectively. The fisheye hole design allows for a certain amount of elasticity in the first and second elastic arms, thereby maintaining a tight connection between the grounding pins even under vibration, significantly improving grounding reliability.
[0009] Preferably, a first plug-in portion is vertically disposed on the bottom surface of the PCB; the first fisheye needle head is inserted into the first plug-in portion from bottom to top with an interference fit, and the first and second elastic arms of the first fisheye needle head respectively abut against the inner wall of the first plug-in portion. The design of the first fisheye needle head and the first plug-in portion allows the first and second elastic arms to abut against the first plug-in portion, thereby tightly connecting the grounding pin and significantly improving grounding reliability.
[0010] Preferably, the first plug-in portion is a vertically distributed slot or jack, which facilitates the insertion of the first fisheye needle, and the inner wall of the slot or jack is convenient for tightly connecting with the first elastic arm and the second elastic arm.
[0011] Preferably, a second plug-in portion is vertically disposed on the top surface of the core; the second fisheye needle is inserted into the second plug-in portion from top to bottom with an interference fit, and the first and second elastic arms of the second fisheye needle respectively abut against the inner wall of the second plug-in portion. The design of the second fisheye needle being plugged into the first plug-in portion allows the first and second elastic arms to abut against the first plug-in portion, thereby tightly connecting the grounding pin and significantly improving grounding reliability.
[0012] Preferably, the second plug-in portion is a vertically distributed slot or jack, which facilitates the insertion of the second fisheye needle, and the inner wall of the slot or jack is convenient for tightly connecting with the first elastic arm and the second elastic arm.
[0013] Preferably, the device further includes a wire rack fixed to the iron core, with a vertically extending positioning hole for inserting the grounding pin. A positioning step is provided on the central needle shaft of the grounding pin. The second fisheye needle head passes through the positioning hole and is connected to the iron core, with the positioning step abutting the top surface of the wire rack. The wire rack facilitates further positioning and limiting of the grounding pin, thereby ensuring its stability during use.
[0014] Preferably, at least one abutting protrusion is provided on the left and right outer walls of the needle bar located in the thread rack; the abutting protrusion is provided obliquely upward and abuts against the inner wall of the thread rack. The abutting protrusion can further ensure that the needle bar is in close contact with the thread rack, thereby further ensuring the reliability and stability of the connection.
[0015] To sum up, the advantage of the present invention is that the structure is designed with fisheye needles at both ends of the grounding pin, and the fisheye needles are connected through interference fit, so that the upper end of the grounding pin can be in tight contact with the PCB board, and the lower end of the grounding pin can be in tight contact with the iron core, thereby improving the firmness and stability of the grounding pin connection, thereby ensuring that grounding failure will not occur. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the grounding structure of the injection molding motor of the present utility model.
[0017] Figure 2 It is a cross-sectional view of the grounding structure of the injection-molded motor of the present invention.
[0018] Figure 3 It is a structural diagram of an existing injection molding motor grounding structure.
[0019] Description of reference numerals:
[0020] 1. Iron core; 11. Second plug-in part; 2. PCB board; 21. First plug-in part; 3. Ground pin; 30. Fisheye hole; 31. First fisheye needle head; 32. Second fisheye needle head; 33. Needle rod; 34. First elastic arm; 35. Second elastic arm; 36. Positioning step; 37. Pressing bump; 4. Wire rack; 41. Positioning through hole. DETAILED DESCRIPTION
[0021] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.
[0022] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.
[0023] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0025] like Figures 1 to 2 As shown, an injection-molded motor grounding structure includes an iron core 1, a PCB board 2, and a grounding pin 3. The PCB board 2 is mounted above the iron core 1 through an injection-molded housing. A first fisheye pin 31 and a second fisheye pin 32 are provided at the upper and lower ends of the grounding pin 3, respectively. Each of the first and second fisheye pins 31 and 32 has a horizontally extending fisheye hole 30 extending through the middle. First and second elastic arms 34 and 35 are formed on the pins on either side of the fisheye hole 30, respectively. The design of the fisheye hole 30 provides a sufficient elastic space for the first and second elastic arms 34 and 35, ensuring a tight connection between the grounding pin 3 even under vibration, significantly improving grounding reliability. The grounding pin 3 is vertically connected between the iron core 1 and the PCB board 2, with the first fisheye pin 31 being connected to the PCB board 2 through an interference fit, and the second fisheye pin 32 being connected to the iron core 1 through an interference fit. The fisheye needle design at both ends of the grounding pin 3 and the interference fit connection of the fisheye needle can ensure that the upper end of the grounding pin 3 is in tight contact with the PCB board 2, and the lower end of the grounding pin 3 is in tight contact with the iron core 1, thereby improving the firmness and stability of the connection of the grounding pin 3 and ensuring that grounding failure will not occur.
[0026] like Figures 1 to 2 As shown, the bottom surface of the PCB board 2 is vertically provided with a first plug-in portion 21; the first plug-in portion 21 is a vertically extending socket, and the socket structure facilitates the insertion of the first fisheye needle 31. The first fisheye needle 31 is inserted into the first plug-in portion 21 from bottom to top and has an interference fit, and the first elastic arm 34 and second elastic arm 35 on the first fisheye needle 31 respectively press against the inner walls on both sides of the first plug-in portion 21. The design of the first fisheye needle 31 plugging into the first plug-in portion 21 allows the first elastic arm 34 and the second elastic arm 35 to press against the first plug-in portion 21, thereby ensuring a tight connection between the grounding pin 3 and the grounding pin 3, greatly improving the reliability of the grounding.
[0027] like Figures 1 to 2 As shown, the top surface of the core 1 is vertically provided with a second plug-in portion 11; the second plug-in portion 11 is a vertically arranged slot, and the slot structure facilitates the insertion of the second fisheye needle 32. The second fisheye needle 32 is inserted into the second plug-in portion 11 from top to bottom and with interference fit, and the first elastic arm 34 and second elastic arm 35 on the second fisheye needle 32 respectively abut against the inner walls on both sides of the second plug-in portion 11. The design of the second fisheye needle 32 plugging into the first plug-in portion 21 allows the first elastic arm 34 and the second elastic arm 35 to abut against the first plug-in portion 21, thereby ensuring a tight connection between the grounding pin 3 and the grounding pin 3, greatly improving the reliability of the grounding.
[0028] like Figures 1 to 2 As shown, it also includes a wire rack 4; the wire rack 4 is fixedly set on the iron core 1, and a positioning through-hole 41 for the grounding pin 3 to pass through is vertically penetrated on the wire rack 4; a positioning step 36 is provided on the needle rod 33 in the middle of the grounding pin 3; the second fisheye needle head 32 passes through the positioning through-hole 41 and is connected to the iron core 1, and the positioning step 36 is against the top surface of the wire rack 4. The wire rack 4 facilitates further positioning and limiting of the grounding pin 3, thereby ensuring the stability of the grounding pin 3 during use. At least one tightening protrusion 37 is provided on the outer walls on the left and right sides of the needle rod 33 located in the wire rack 4; the tightening protrusion 37 is set obliquely upward, and the tightening protrusion 37 is pressed against the inner wall of the wire rack 4. The tightening protrusion 37 can further make the needle rod 33 tightly contact the wire rack 4, thereby further ensuring the reliability and stability of the connection.
[0029] In the production process, the second fisheye needle head 32 at the lower end of the grounding pin 3 is pressed into the second plug-in portion 11 of the iron core 1. After pressing, the first elastic arm 34 and the second elastic arm 35 are squeezed and deformed, so that the first elastic arm 34 and the second elastic arm 35 of the second fisheye needle head 32 are tightly contacted in the second plug-in portion 11. Then the iron core 1 is integrally injection-molded into a motor sub-assembly and forms an injection-molded shell, and then the PCB board 2 is fixed on the injection-molded shell. Finally, the first fisheye needle head 31 at the upper end of the grounding pin 3 is pressed into the first plug-in portion 21 in the same way as the second fisheye needle head 32, thereby ensuring that the two ends of the grounding pin 3 are stably and firmly fixed on the iron core 1 and the PCB board 2, respectively, greatly improving the reliability of grounding, and ultimately ensuring that it will not fail during use.
[0030] To sum up, the advantage of the present invention is that the structure is designed with fisheye needles at both ends of the grounding pin 3, and is connected through interference fit of the fisheye needles, so that the upper end of the grounding pin 3 is in tight contact with the PCB board 2, and the lower end of the grounding pin 3 is in tight contact with the iron core 1, thereby improving the firmness and stability of the connection of the grounding pin 3, thereby ensuring that grounding failure will not occur.
[0031] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.
[0032] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.
[0033] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. An injection molded motor grounding structure, characterized in that: The invention comprises an iron core (1), a PCB board (2) and a grounding pin (3); the PCB board (2) is mounted above the iron core (1); a first fisheye needle head (31) and a second fisheye needle head (32) are respectively provided at the upper and lower ends of the grounding pin (3); the grounding pin (3) is vertically connected between the iron core (1) and the PCB board (2), and the first fisheye needle head (31) is connected to the PCB board (2); and the second fisheye needle head (32) is connected to the iron core (1).
2. The injection molded motor grounding structure according to claim 1, characterized in that: The first fisheye needle (31) and the second fisheye needle (32) are both provided with a fisheye hole (30) extending transversely therethrough in the middle; and a first elastic arm (34) and a second elastic arm (35) are respectively formed on both sides of the fisheye hole (30) on the first fisheye needle (31) and the second fisheye needle (32).
3. The injection molding motor grounding structure according to claim 2, characterized in that: The bottom surface of the PCB board (2) is vertically provided with a first plug-in portion (21); the first fisheye needle head (31) is inserted into the first plug-in portion (21) from bottom to top with interference fit, and the first elastic arm (34) and the second elastic arm (35) on the first fisheye needle head (31) are respectively pressed against the first plug-in portion (21).
4. The injection molding motor grounding structure according to claim 3, characterized in that: The first plug-in portion (21) is a vertically distributed slot or socket.
5. The injection molding motor grounding structure according to claim 2 or 3, characterized in that: A second plug-in portion (11) is vertically provided on the top surface of the iron core (1); the second fisheye needle head (32) is inserted into the second plug-in portion (11) from top to bottom with interference fit, and the first elastic arm (34) and the second elastic arm (35) on the second fisheye needle head (32) are respectively pressed against the second plug-in portion (11).
6. The injection molding motor grounding structure according to claim 5, characterized in that: The second plug-in portion (11) is a vertically distributed slot or socket.
7. The injection molded motor grounding structure according to claim 1, characterized in that: It also includes a wire rack (4); the wire rack (4) is fixedly arranged on the iron core (1), and a positioning through hole (41) for the grounding needle (3) to pass through is vertically penetrated on the wire rack (4); a positioning step (36) is provided on the needle rod (33) in the middle of the grounding needle (3); the second fisheye needle head (32) passes through the positioning through hole (41) and is connected to the iron core (1), and the positioning step (36) is against the top surface of the wire rack (4).
8. The injection molding motor grounding structure according to claim 7, characterized in that: At least one abutting protrusion (37) is provided on the left and right outer walls of the needle bar (33) located in the thread rack (4); the abutting protrusion (37) is provided obliquely upward, and the abutting protrusion (37) abuts against the inner side wall of the thread rack (4).