Coil Assembly, Swing Motor and Laser Scanning Galvanometer

Abstract

The present invention relates to a coil assembly, an oscillating motor, and a laser scanning galvanometer, and relates to the technical field of oscillating motors. The coil assembly includes a coil skeleton, a coil, and a limiting seat. The coil skeleton can be plugged into and matched with a motor housing, and includes a support portion and a limiting portion protruding from the support portion. The coil is wound around the limiting portion and is in close contact with the support portion, and the coil is no higher than the highest point of the limiting portion away from the support portion. The limiting seat is installed at one end of the support portion and is used for interference fit with the motor housing. This alleviates the technical problems of the prior art in that the coil assembly process is complicated, the assembly efficiency is low, and the coil is easily scratched.

Description

Technical Field

[0001] The present invention relates to the technical field of swing motors, and in particular to a coil assembly, a swing motor and a laser scanning galvanometer. Background Art

[0002] At present, the laser scanning galvanometer motor uses glue to bond the coil to the motor housing, which can be specifically divided into three structures: the first is to use glue to bond the coil directly to the inner wall of the magnetic casing; the second is to first inject glue into the surface of the coil to form a whole, and then use glue to bond and fix it to the inner wall of the magnetic casing; the third is to first use glue to bond and fix the coil to a cylindrical magnet, and then bond and fix it to a non-magnetic casing.

[0003] The current glue bonding process requires a complex set of steps. First, a large number of glue-filling molds must be prepared. Before glue filling, the molds must be cleaned and greased evenly inside the molds. The glue is then mixed and stirred thoroughly, then placed in an oven to soften. The housing is then installed on the glue-filling mold, and a certain amount of mixed glue is injected along the inside of the housing. The coil is then squeezed into the gap between the mold core and the housing, and any excess glue is cleaned. The housing, coil, and glue-filling mold are then placed in an oven to accelerate the curing of the glue. Finally, the glue-filling mold is removed from the housing, where the coil has been cured, completing the coil-to-housing bonding process. After the coil-to-housing bonding process is complete, the cured glue must be cleaned from the housing. This cleaning process, performed with a scraper or tooling, reduces assembly efficiency and can easily scratch the coil, impacting motor performance. Summary of the Invention

[0004] The purpose of the present invention is to provide a coil assembly, a swing motor and a laser scanning galvanometer to alleviate the technical problems in the prior art of the coil assembly process being complicated, the assembly efficiency being low, and the coil being easily scratched.

[0005] In order to achieve the above objectives, in a first aspect, an embodiment provides a coil assembly, including a coil bobbin, a coil, and a limiting seat;

[0006] The coil skeleton can be plugged into and fit with the motor housing, and includes a support portion and a limiting portion protruding from the support portion; the coil is wrapped around the limiting portion and is in close contact with the support portion, and the coil is not higher than the highest point of the limiting portion away from the support portion; the limiting seat is installed at one end of the support portion and is used to interference fit with the motor housing.

[0007] In an optional embodiment, the coil assembly further includes an insulating tape, which is wrapped around the outer surface of the coil to isolate the coil from the motor housing.

[0008] In an alternative embodiment, the coil assembly further includes a wire protecting sleeve, the limiting seat includes a positioning hole, the coil is provided with a lead wire, and the lead wire passes through the positioning hole and is received in the wire protecting sleeve.

[0009] In an alternative embodiment, the supporting portion is a cylindrical structure with openings at both ends. One of the supporting portion and the limiting seat is provided with a protrusion, and the other is provided with a card slot that is inserted and matched with the protrusion. The opening of the card slot faces the axial direction of the supporting portion.

[0010] In an alternative embodiment, the coil assembly further includes a washer. The washer is sleeved on the end of the supporting portion facing away from the limiting seat and abuts against the coil.

[0011] In a second aspect, the embodiment provides a swing motor, including a motor housing and the coil assembly according to any one of the foregoing embodiments;

[0012] The coil assembly is in interference fit with the motor housing through the limiting seat.

[0013] In an alternative embodiment, the swing motor further includes a motor shaft, a first bearing, and a second bearing;

[0014] The motor shaft is rotatably installed in the motor housing through the first bearing and the second bearing, and the motor shaft is in clearance fit with the coil assembly.

[0015] In an alternative embodiment, the swing motor further includes a pressing plate and a first bolt;

[0016] One side of the motor housing facing the output end of the motor shaft is provided with a first threaded hole. The pressing plate is provided with a first connection hole and a second connection hole. The first bolt passes through the first connection hole and is in threaded fit with the first threaded hole. The motor shaft is inserted and matched with the second connection hole, and the output end of the motor shaft protrudes from the side of the pressing plate facing away from the motor housing.

[0017] In an alternative embodiment, the swing motor further includes a limiting pad and a limiting pin. The output end of the motor shaft is provided with a limiting hole, and the limiting pin is inserted and matched with the limiting hole;

[0018] The limiting pad is provided with a first accommodating opening and a second accommodating opening. The limiting pad is in close contact with the side of the pressing plate facing away from the motor housing, and the limiting pin is received in the first accommodating opening, and the nut of the first bolt is clamped in the second accommodating opening;

[0019] The first accommodating opening is used to limit the swinging angle of the limiting pin, and the second accommodating opening is used to complete the radial positioning of the limiting pad and the pressing plate.

[0020] In a third aspect, an embodiment provides a laser scanning galvanometer, including a swing motor as described in any one of the foregoing embodiments.

[0021] Compared with the prior art, the beneficial effects of the coil assembly, the swing motor, and the laser scanning galvanometer provided by the present invention are as follows:

[0022] The coil assembly provided by the present invention includes a coil skeleton, a coil, and a limit seat. Among them, the coil skeleton includes a support portion and a limit portion protruding from the support portion. The entire coil skeleton can be inserted into the motor housing. The coil is wound and formed around the limit portion through a winding die. The finally formed coil is in contact with the support portion, and the coil does not exceed the highest point of the limit portion away from the support portion. This setting ensures that when the coil skeleton is inserted into the motor housing, the coil will not scrape against the inside of the motor housing, ensuring the quality of the coil. In addition, the limit seat is installed on one side of the support portion. When the coil skeleton is inserted into the motor housing, the limit seat can be in interference fit with the motor housing to complete the relative fixation of the coil assembly and the motor housing, ensuring the assembly of the coil in the motor housing.

[0023] This assembly method is simple and convenient, and does not require cumbersome processes such as potting and scraping glue, improving the production and assembly efficiency of the motor. At the same time, after the coil is manufactured, it is supported by the coil skeleton, effectively avoiding the deformation of the coil due to external force before assembly, and facilitating the mass winding and storage of the coil.

[0024] The technical advantages of the swing motor provided by the present invention are the same as those of the above coil assembly, and will not be elaborated here.

[0025] The technical advantages of the laser scanning galvanometer provided by the present invention are the same as those of the above swing motor, and will not be elaborated here.

[0026] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is an exploded view of the coil assembly provided by the embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of the coil skeleton in the coil assembly provided by the embodiment of the present invention;

[0030] Figure 3The schematic diagram of the connection between the motor housing and the limit seat in the swing motor provided by the embodiment of the present invention;

[0031] Figure 4 The exploded view of the swing motor provided by the embodiment of the present invention.

[0032] Icon: 10 - Coil bobbin; 20 - Coil; 30 - Limit seat; 40 - Wire protection sleeve; 50 - Washer; 60 - Insulating tape; 70 - Motor housing; 80 - First bearing; 90 - Second bearing; 110 - Snap ring; 120 - Motor shaft; 130 - Pressure plate; 140 - Limit pin; 150 - First bolt; 160 - Limit pad; 170 - Photoelectric plate; 180 - Sector plate; 190 - End cover; 210 - Second bolt;

[0033] 11 - Support part; 12 - Limiting part;

[0034] 21 - Lead wire;

[0035] 71 - First threaded hole;

[0036] 161 - First accommodation port; 162 - Second accommodation port. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] Embodiment 1

[0041] Reference Figures 1-3 , the coil assembly provided in this embodiment includes a coil bobbin 10, a coil 20, and a limit seat 30. Among them, the coil bobbin 10 includes a support portion 11 and a limit portion 12 protruding from the support portion 11. The entire coil bobbin 10 can be inserted into the motor housing 70. The coil 20 is wound around the limit portion 12 through a winding die to form a shape. The finally formed coil 20 is in contact with the support portion 11, and the coil 20 does not exceed the highest point of the limit portion 12 away from the support portion 11. This setting ensures that when the coil bobbin 10 is inserted into the motor housing 70, the coil 20 will not be scratched by the inside of the motor housing 70, ensuring the quality of the coil 20. In addition, the limit seat 30 is installed on one side of the support portion 11. When the coil bobbin 10 is inserted into the motor housing 70, the limit seat 30 can be in interference fit with the motor housing 70 to complete the relative fixation of the coil assembly and the motor housing 70, ensuring the assembly of the coil 20 in the motor housing 70.

[0042] This assembly method is simple and convenient, without the need for cumbersome processes such as potting and scraping glue, improving the production and assembly efficiency of the motor. At the same time, after the coil 20 is manufactured, it is supported by the coil bobbin 10, effectively avoiding the deformation of the coil 20 due to external force before assembly, and facilitating the large-scale winding and storage of the coil 20.

[0043] It should be noted that the shape of the limit portion 12 in this embodiment matches the shape formed by the finally formed coil 20. At the same time, referring to Figure 2 , the above-mentioned coil 20 does not exceed the highest point of the limit portion 12 away from the support portion 11, which means that the thickness of the coil 20 does not exceed the thickness of the limit portion 12, and also refers to the state when the coil assembly is not assembled to the motor housing 70. After the motor is assembled and works for a certain period of time, the coil 20 can expand and partially protrude from the limit portion 12. Finally, this embodiment preferably sets that there are two limit portions 12, and the outer side surfaces of the two limit portions 12 are both arc surfaces and are coaxially arranged.

[0044] Specifically, this embodiment also makes the following detailed introduction to the specific structure of the coil assembly.

[0045] In this embodiment, the coil assembly further includes an insulating tape 60, and the insulating tape 60 is wrapped on the outer surface of the coil 20 for isolating the coil 20 and the motor housing 70.

[0046] Specifically, the insulating tape 60 wraps around the coil 20 and the outer side surface of the limiting portion 12 to form a cylindrical profile. During the assembly process, the coil assembly is scraped against the inner wall of the motor housing 70 through the insulating tape 60, which will not affect the quality of the coil 20 wrapped by the insulating tape 60; even when the motor is working and the coil 20 partially protrudes from the limiting portion 12, the insulating tape 60 is the first part of the motor housing 70 to be worn, which further ensures the quality of the coil 20 and improves the service life of the coil assembly.

[0047] In this embodiment, the coil assembly further includes a wire protection sleeve 40 , the limiting seat 30 includes a positioning hole, and the coil 20 is provided with a lead wire 21 , which passes through the positioning hole and is accommodated in the wire protection sleeve 40 .

[0048] Specifically, a guide groove is provided on one end face of the motor housing 70, and the limit seat 30 is close to the end of the motor housing 70 where the guide groove is provided. After the lead wire 21 of the coil 20 passes through the positioning hole and is accommodated in the wire protection sleeve 40, the wire protection sleeve 40 can be embedded in the guide groove to ensure that the lead wire 21 eventually protrudes from the outer wall of the motor housing 70.

[0049] In this embodiment, the support portion 11 is a cylindrical structure with openings at both ends. One of the support portion 11 and the limit seat 30 is provided with a protrusion, and the other is provided with a slot that is plugged into and fits with the protrusion, and the opening of the slot is facing the axial direction of the support portion 11.

[0050] Specifically, two slots are provided at one end of the support portion 11, and two protrusions are provided on the same side of the limit seat 30. The radial fixation of the limit seat 30 and the coil frame 10 is completed by plugging the protrusions into the corresponding slots. After the limit seat 30 is interference fit in the motor housing 70, the coil 20 basically does not rotate relative to the motor housing 70, and the position of its lead wire 21 and the positioning hole basically does not change.

[0051] Specifically, the entire coil frame 10 is made of plastic with high strength and low water absorption rate. The support part 11 can effectively ensure the support of the coil 20. At the same time, after the motor shaft is rotated and installed in the cavity of the support part 11, the gap between the coil 20 and the motor shaft can be controlled to be very small, further improving the working performance of the motor.

[0052] In this embodiment, the coil assembly further includes a washer 50 . The washer 50 is sleeved on an end of the support portion 11 away from the limiting seat 30 and abuts against the coil 20 .

[0053] Specifically, the limit seat 30 and the washer 50 can prevent the coil 20 from protruding from the end of the support part 11 due to expansion. At the same time, when the axial positioning of the coil assembly and the motor housing 70 is completed by the bearing, the washer 50 can prevent the outer ring of the bearing from directly contacting the coil 20, thereby preventing the outer ring of the bearing from rotating and wearing the coil 20.

[0054] Example 2

[0055] This embodiment provides a swing motor, including a motor housing 70 and a coil assembly as described in any of the above embodiments. The coil assembly is interference-fitted with the motor housing 70 via a limiting seat 30 .

[0056] The technical advantages of the swing motor provided in this embodiment are the same as the technical advantages of the above-mentioned coil assembly, and will not be repeated here.

[0057] Reference Figure 4 In this embodiment, the swing motor further includes a motor shaft 120, a first bearing 80 and a second bearing 90; the motor shaft 120 is rotatably mounted on the motor housing 70 through the first bearing 80 and the second bearing 90, and the motor shaft 120 is clearance-matched with the coil assembly.

[0058] Specifically, the inner rings of the first bearing 80 and the second bearing 90 are transitionally fitted at both ends of the motor shaft 120, while the outer rings of the first bearing 80 and the second bearing 90 are both clearance-fitted with the motor housing 70. The motor housing 70 has a first opening and a second opening at each end, respectively. The first opening is larger than the second opening. The coil assembly and the motor shaft 120 are both inserted into the motor housing 70 through the first opening. The retaining ring 110 is engaged at the second opening of the motor housing 70 to prevent the first bearing 80 from being removed from the motor housing 70.

[0059] Please continue to refer to Figure 4 In this embodiment, the swing motor also includes a pressure plate 130 and a first bolt 150; a first threaded hole 71 is provided on the side of the motor housing 70 facing the output end of the motor shaft 120, and the pressure plate 130 is provided with a first connecting hole and a second connecting hole. The first bolt 150 passes through the first connecting hole and is threadedly engaged with the first threaded hole 71, and the motor shaft 120 is plugged into the second connecting hole, and the output end of the motor shaft 120 protrudes from the side of the pressure plate 130 away from the motor housing 70.

[0060] Specifically, it is preferred to set the number of first bolts 150 to two, the second connecting hole is set at the center position of the pressure plate 130, there are two first connecting holes and they are arranged on both sides of the second connecting hole, the pressure plate 130 is fixed to the first opening of the motor housing 70 by the first bolt 150 to prevent the second bearing 90 from falling out of the motor housing 70. At this time, the outer ring of the first bearing 80 and the outer ring of the second bearing 90 are respectively abutted against the two ends of the coil assembly to complete the axial fixation of the coil assembly and the motor housing 70.

[0061] It is worth noting that in this embodiment, a corrugated pad is further provided between the pressure plate 130 and the second bearing 90 . The elastic deformation of the corrugated pad ensures that the pressure plate 130 and the retaining ring 110 continuously clamp the first bearing 80 and the second bearing 90 .

[0062] Please continue to refer to Figure 4 In this embodiment, the swing motor further includes a limit pad 160 and a limit pin 140. A limit hole is provided at the output end of the motor shaft 120, and the limit pin 140 is inserted and matched with the limit hole; the limit pad 160 is provided with a first accommodation port 161 and a second accommodation port 162. The limit pad 160 is in close contact with the side of the pressure plate 130 facing away from the motor housing 70, and the limit pin 140 is accommodated in the first accommodation port 161, and the nut of the first bolt 150 is clamped in the second accommodation port 162; the first accommodation port 161 is used to limit the swing angle of the limit pin 140, and the second accommodation port 162 is used to complete the radial positioning of the limit pad 160 and the pressure plate 130.

[0063] Specifically, the first accommodation port 161 is provided at the central position of the limit pad 160. The number of the second accommodation ports 162 is two and corresponds to the two first connection holes on the pressure plate 130 one by one. The limit pad 160 can be directly in close contact with the pressure plate 130, and the limit pin 140 is accommodated in the first accommodation port 161, and the nut of the first bolt 150 is inserted into the corresponding second accommodation port 162. At this time, the clamping fit between the nut of the first bolt 150 and the second accommodation port 162 ensures the radial fixation of the limit pad 160 and the pressure plate 130. At this time, when the swing motor is working, its swing amplitude is determined by the swing angle of the limit pin 140 in the first accommodation port 161.

[0064] It is worth noting that after the output end of the motor shaft 120 passes through the limit pad 160, it will also pass through the optoelectronic plate 170 and be fixedly connected to the sector plate 180. The second bolt 210 passes through the end cover 190 and the optoelectronic plate 170 in sequence and is threadedly connected to the motor housing 70 to complete the axial fixation of the limit pad 160 and the pressure plate 130. In the above setting, the pressure plate 130 that plays a role in limiting the swing is arranged at the position of the nut of the first bolt 150, so that the length of the swing motor is shorter and the structure is more compact.

[0065] Embodiment Three

[0066] This embodiment provides a laser scanning galvanometer, including the swing motor described in any one of the foregoing embodiments.

[0067] The technical advantages of the laser scanning galvanometer provided in this embodiment are the same as those of the above swing motor, and will not be elaborated here.

[0068] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coil assembly, characterized in that, Comprising: A coil bobbin (10), the coil bobbin (10) being capable of being inserted and mated with a motor housing (70), and comprising a support portion (11) and a limiting portion (12) protruding from the support portion (11); A coil (20), the coil (20) being wound around the periphery of the limiting portion (12) and being in close contact with the support portion (11), the coil (20) not exceeding the highest point of the limiting portion (12) away from the support portion (11); and A limiting seat (30), the limiting seat (30) being installed at one end of the support portion (11) and being used for interference fit with the motor housing (70); The coil assembly further comprises an insulating tape (60), the insulating tape (60) being wrapped around the outer surface of the coil (20) for isolating the coil (20) and the motor housing (70); The coil assembly further comprises a wire protection sleeve (40), the limiting seat (30) comprises a positioning hole, the coil (20) is provided with a lead wire (21), and the lead wire (21) passes through the positioning hole and is received in the wire protection sleeve (40).

2. The coil assembly according to claim 1, wherein The support portion (11) is a cylindrical structure with openings at both ends, one of the support portion (11) and the limiting seat (30) is provided with a protrusion, and the other is provided with a slot for inserting and mating with the protrusion, and the opening of the slot faces the axial direction of the support portion (11).

3. The coil assembly according to claim 1 or 2, characterized in that, The coil assembly further comprises a washer (50), the washer (50) is sleeved on one end of the support portion (11) away from the limiting seat (30) and abuts against the coil (20).

4. A swing motor, characterized in that: Comprising a motor housing (70) and the coil assembly according to any one of claims 1-3; The coil assembly is in interference fit with the motor housing (70) through the limiting seat (30).

5. The oscillating motor according to claim 4, characterized in that: The swing motor further comprises a motor shaft (120), a first bearing (80) and a second bearing (90); The motor shaft (120) is rotatably installed in the motor housing (70) through the first bearing (80) and the second bearing (90), and the motor shaft (120) is in clearance fit with the coil assembly.

6. The swing motor according to claim 5, wherein, The swing motor further comprises a pressing plate (130) and a first bolt (150); One side of the motor housing (70) facing the output end of the motor shaft (120) is provided with a first threaded hole (71), the pressing plate (130) is provided with a first connection hole and a second connection hole, the first bolt (150) passes through the first connection hole and is in threaded fit with the first threaded hole (71), the motor shaft (120) is in inserted fit with the second connection hole, and the output end of the motor shaft (120) protrudes from the side of the pressing plate (130) away from the motor housing (70).

7. The swing motor according to claim 6, characterized in that, The swing motor further comprises a limiting pad (160) and a limiting pin (140), the output end of the motor shaft (120) is provided with a limiting hole, and the limiting pin (140) is in inserted fit with the limiting hole; The limiting pad (160) is provided with a first receiving opening (161) and a second receiving opening (162). The limiting pad (160) is in close contact with the side of the pressure plate (130) facing away from the motor housing (70), and the limiting pin (140) is received in the first receiving opening (161), so that the nut of the first bolt (150) is clamped in the second receiving opening (162). The first accommodating opening (161) is used to limit the swing angle of the limiting pin (140), and the second accommodating opening (162) is used to complete the radial positioning of the limiting pad (160) and the pressure plate (130).

8. A laser scanning galvanometer, characterized in that, Comprising the swing motor as described in any one of claims 4-7.

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