Brushless micromotor with built-in controller, surface-mounted magnet and direct-current inner rotor
By incorporating a built-in controller, surface-mount magnets, and a DC internal rotor brushless micro motor, the problems of high noise, easily broken leads, and difficulty in disassembly in traditional brushless micro motors are solved, achieving the effects of reduced noise, improved lead strength, and convenient disassembly.
Patent Information
- Application Number
- CN202520027822.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Traditional brushless micro motors suffer from problems such as high noise, easily broken leads, and complex structure that makes them difficult to disassemble and repair, resulting in high scrap costs.
It adopts a design with a built-in controller, surface-mount magnets and a DC internal rotor brushless micro motor. The magnets are stably mounted by setting positioning ribs and snap-fit grooves on the outside of the rotor core. The motor leads are connected to the controller by a plug-in structure. The claw structure of the iron shell and iron back cover achieves a stable connection and facilitates disassembly.
It reduces motor noise, improves the strength of motor leads, simplifies disassembly and repair processes, and reduces scrap costs.
Smart Images
Figure CN223713682U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a brushless motor technical field especially relates to a kind of built-in controller, surface mount magnet and direct current inner rotor brushless micromotor. BACKGROUND
[0002] Brushless micromotor is a small version of brushless direct current motor, usually used in the application needing compact design, high efficiency and long life, the traditional direct current brushless micromotor usually adopts magnetic stone to be adhered on rotor, lead wire is directly welded on controller, stator is assembled in iron shell by adhesive, adopts magnetic stone to be adhered, and the torsion is small, the volume of motor is large for the same performance requirement;Lead wire is directly welded on controller, but due to the small diameter of functional lead wire, the small wire core is prone to wire breakage;Stator is assembled in iron shell by adhesive, cannot be disassembled for repair, since it is built-in controller, the area of board required by controller is larger, for the electronic components required to be arranged, many similar motor controller inner holes are smaller than the outer diameter of rotor rear liner, so generally stator and rotor are assembled together and then put into iron shell, if disassembly for repair is impossible, the cost of scrapping is high.
[0003] The existing small volume, built-in controller micromotor has some defects, one is that micromotor noise is large, two is that lead wire is prone to break at welding point, three is that the stability requirement of mutual assembly between motor inner structure, stator, iron shell, wire rack, iron rear cover and controller leads to that motor is not convenient to disassemble for repair, these defects comprehensively affect the performance of micromotor, therefore we propose a kind of built-in controller, surface mount magnet and direct current inner rotor brushless micromotor to solve this problem. SUMMARY
[0004] To solve the above problems, the utility model provides a kind of built-in controller, surface mount magnet and direct current inner rotor brushless micromotor to more exactly solve the above-mentioned problems.
[0005] The utility model discloses a technical scheme:
[0006] The utility model discloses a kind of built-in controller, surface mount magnet and direct current inner rotor brushless micromotor, including iron shell, stator mechanism and rotor mechanism, the stator mechanism slidingly covers the outside of rotor mechanism, the iron shell slidingly covers the outside of stator mechanism, the top of the iron shell is movably clamped with iron rear cover, the iron rear cover is used to press together in iron shell with rotor mechanism and electronic mechanism, for the whole device is conveniently disassembled;The rotor mechanism includes center shaft and rotor core, the outside of the center shaft is provided with two bearings, the rotor core is fixedly covered in the outside of center shaft, the outside of the rotor core is provided with a plurality of magnetic stones, there is gap between the magnetic stone and stator core, for reducing motor tooth slot torque and reducing motor noise.
[0007] Further, the outer side of the rotor core is uniformly provided with a plurality of positioning ribs, the rotor core and the two adjacent positioning ribs form a clamping groove, the magnet is movably clamped in the corresponding clamping groove, and the outer side of the rotor core is fixedly sleeved with two magnetic shielding rings.
[0008] Further, the top end and the bottom end of the rotor core are respectively fixedly connected with a rear balance block and a front balance block, and the rear balance block and the front balance block are closely attached to one side of the corresponding magnetic shielding ring.
[0009] Further, the stator mechanism comprises a stator core, a rear wire holder and a front wire holder, a circular hole is formed in the top center of the stator core, a plurality of fan-shaped holes are formed in the top edge of the stator core, the fan-shaped holes are communicated with the circular hole, the rear wire holder and the front wire holder are provided with a plurality of plug-in sleeves on one side, the cross section of the plug-in sleeve is fan-shaped and is matched with the fan-shaped hole, a foolproof column is arranged on the rear wire holder, a foolproof groove is formed in the top of the stator core, and the foolproof column is matched with the foolproof groove.
[0010] Further, the top of the rear wire holder is provided with a controller, a positioning groove is formed in the controller, a positioning column is arranged on the rear wire holder, the positioning groove is matched with the positioning column, a plurality of buckles are arranged on the top of the rear wire holder, a plurality of clamping grooves are formed in the top edge of the controller, the buckles are matched with the clamping grooves, a silica gel pad is arranged on the top of the controller, and the silica gel pad is located below the rear iron cover.
[0011] Further, the top of the controller is provided with a socket and a jack, a functional wire is connected in the jack, a motor lead wire is plugged into the socket, and the functional wire and the motor lead wire are connected with the same plug at one end.
[0012] Further, a plurality of positioning blocks are fixedly installed on the inner wall of the iron shell, the bottom of the stator core movably abuts against the top of the positioning blocks, a positioning strip is formed in the inner wall of the iron shell, a strip-shaped groove is formed in the outer side of the rotor core, and the positioning strip is matched with the strip-shaped groove.
[0013] Further, a stop position is arranged on the inner wall of the iron shell, for supporting and limiting the rear iron cover, a notch position is formed in the top of the iron shell, a convex point is arranged on the rear iron cover, and the convex point is matched with the notch position.
[0014] Further, the bottom of the iron shell and the top of the rear iron cover are provided with convex shells, and the bearing is movably clamped in the corresponding convex shell.
[0015] The beneficial effects of the utility model are as follows:
[0016] 1. The utility model provides a plurality of positioning ribs are evenly arranged through the outside of rotor core, and the rotor core and the adjacent two positioning ribs form the clamping groove, makes the magnet steady clamping in the corresponding clamping groove, since the magnet is designed as eccentric structure and forms the uneven air gap with the stator mechanism, thereby reduces motor tooth slot torque, reduces motor noise.
[0017] 2. Through the setting of the plug structure one at the end of motor lead, the plug structure one can be firmly welded on the controller through the internal plug pin, through the setting of the plug structure two at the end of function lead, the plug pin on the plug structure two is stably plugged in the jack on the controller, so that the motor lead and the function line can be firmly connected with the controller, and will not be broken due to repeated bending.
[0018] 3. Through the setting of the positioning block, the positioning strip, the stop mouth position, the gap position and the convex shell on the iron shell, the convex point and the convex shell on the iron back cover, and the embedded claw structure and the strip-shaped groove on the stator core, the stable connection of the iron shell, the iron back cover and the stator core is realized, through the setting of the anti-stupid groove on the stator core, the setting of the anti-stupid column, the buckle and the positioning column on the rear wire frame, the setting of the clamping groove and the positioning groove on the controller, the stable connection of the stator core, the rear wire frame and the controller is realized, and the above clamping mode is convenient for subsequent disassembly.
[0019] 4. The bearing on the upper side of the central shaft is clamped into the convex shell on the iron back cover, the bearing on the lower side of the central shaft is clamped into the convex shell on the iron shell, and the iron back cover is pressed against the silica gel pad, so as to realize the function of pressing the stator and the rotor assembly, and when subsequent repair is needed, the stator and the rotor assembly can be taken out by only disassembling the iron back cover, and the traditional stator mechanism and the shell are bonded by using glue, and the above mode avoids damage caused when the stator mechanism is taken out. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a three-dimensional structure schematic view of the utility model of a kind of built-in controller, surface-mounted magnet and direct current inner rotor brushless micro motor;
[0021] Figure 2 It is a three-dimensional structure schematic view of the rotor mechanism of the utility model of a kind of built-in controller, surface-mounted magnet and direct current inner rotor brushless micro motor;
[0022] Figure 3 It is an explosion view of the rotor mechanism of the utility model of a kind of built-in controller, surface-mounted magnet and direct current inner rotor brushless micro motor;
[0023] Figure 4 It is a three-dimensional structure schematic view of the stator mechanism of the utility model of a kind of built-in controller, surface-mounted magnet and direct current inner rotor brushless micro motor;
[0024] Figure 5 An explosion map of a stator mechanism of a built-in controller, surface-mounted magnet and DC inner rotor brushless micro motor is provided in the utility model;
[0025] Figure 6 A top view structural schematic diagram of a stator core of a built-in controller, surface-mounted magnet and DC inner rotor brushless micro motor is provided in the utility model;
[0026] Figure 7 A three-dimensional structural schematic diagram of an iron shell of a built-in controller, surface-mounted magnet and DC inner rotor brushless micro motor is provided in the utility model.
[0027] The signs are as follows:
[0028] In the drawing: 1, rear wire frame; 2, controller; 3, iron back cover; 4, functional wire; 5, iron shell; 6, rear balance block; 7, magnet; 8, stator core; 9, front balance block; 10, bearing; 11, center shaft; 12, silica gel pad; 13, front wire frame; 14, rotor core; 15, motor lead; 16, magnet protection ring; 17, plug; 18, fan-shaped hole; 19, foolproof groove; 20, foolproof column; 21, plug-in cylinder; 22, positioning column; 23, positioning groove; 24, buckle; 25, clamping groove; 26, socket; 27, positioning block; 28, positioning strip; 29, strip-shaped groove; 30, convex shell; 31, stop position; 32, notch position; 33, convex point; 34, positioning rib. Specific implementation
[0029] In order to more clearly and completely illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings.
[0030] Please refer to Figures 1-7 The utility model provides a built-in controller, surface-mounted magnet and DC inner rotor brushless micro motor, including iron shell 5, stator mechanism and rotor mechanism, the stator mechanism slidingly sets in the outside of rotor mechanism, iron shell 5 slidingly sets in the outside of stator mechanism, the top of iron shell 5 movably connects with iron back cover 3, iron back cover 3 is used for pressing together rotor mechanism and electronic mechanism in iron shell 5, for the convenient disassembly of the whole device;Rotor mechanism includes center shaft 11 and rotor core 14, the outside of center shaft 11 is provided with two bearings 10, the fixed sleeve of rotor core 14 sets in the outside of center shaft 11, the outside of rotor core 14 is provided with a plurality of magnets 7, and there is a gap between magnet 7 and stator core 8, for reducing motor tooth slot torque and reducing motor noise.
[0031] As Figure 3As shown, the outer side of the rotor core 14 is uniformly provided with a plurality of positioning ribs 34, the rotor core 14 and the two adjacent positioning ribs 34 form a clamping groove, the magnet 7 is movably clamped in the corresponding clamping groove, the outer side of the rotor core 14 is fixedly sleeved with two magnetic shielding rings 16, the magnet 7 is a surface-mounted sintered neodymium-iron-boron eccentric magnet 7, after a plurality of magnets 7 are assembled on the rotor core 14, although the magnet 7 has strong performance, but due to the design of the eccentric structure, an uneven air gap is formed between the magnet 7 and the stator mechanism, thereby reducing the motor tooth slot torque and reducing the motor noise.
[0032] It is further explained that the two magnetic shielding rings 16 are symmetrically arranged up and down, and the magnetic property is coated and limited to prevent the magnet 7 from falling off during operation; the rotor core 14 is provided with the positioning rib 34, which helps the radial positioning of the magnet 7 and prevents the motor from vibrating and producing noise due to uneven radial assembly of the magnet 7.
[0033] As shown in Figure 2 and Figure 3 , the top end and the bottom end of the rotor core 14 are fixedly connected with the rear balance block 6 and the front balance block 9 respectively, the rear balance block 6 and the front balance block 9 are closely attached to one side of the corresponding magnetic shielding ring 16, in order to reduce the vibration and noise caused by imbalance during motor operation, the rear balance block 6 and the front balance block 9 are arranged on the rotor core 14, the balance block is a key component for adjusting the mass distribution of the rotor to achieve better dynamic balance state.
[0034] As shown in Figure 4 , Figure 5 and Figure 6 , the stator mechanism includes a stator core 8, a rear wire holder 1 and a front wire holder 13, a circular hole is formed in the top center of the stator core 8, a plurality of fan-shaped holes 18 are formed in the top edge of the stator core 8, the fan-shaped holes 18 are in communication with the circular hole, the rear wire holder 1 and the front wire holder 13 are provided with a plurality of plug-in barrels 21 on one side, the cross section of the plug-in barrel 21 is fan-shaped and matched with the fan-shaped hole 18, the rear wire holder 1 is provided with a foolproof column 20, the top of the stator core 8 is provided with a foolproof groove 19, and the foolproof column 20 is matched with the foolproof groove 19.
[0035] The controller 2 is placed on the top of the rear wire holder 1, the controller 2 is provided with a positioning groove 23, the rear wire holder 1 is provided with a positioning column 22, the positioning groove 23 is matched with the positioning column 22, the top of the rear wire holder 1 is provided with a plurality of buckles 24, the top edge of the controller 2 is provided with a plurality of clamping grooves 25, the buckle 24 is matched with the clamping groove 25, the controller 2 is placed with a silica gel pad 12 on the top, and the silica gel pad 12 is located below the iron rear cover 3.
[0036] It needs to be explained that the anti-fooling column 20 arranged on the rear line frame 1 and the anti-fooling groove 19 opened at the top of the stator core 8 realize the anti-fool assembly requirement of the rear line frame 1 and the stator core 8, and the positioning groove 23 opened on the controller 2 and the positioning column 22 arranged on the rear line frame 1 realize the radial positioning function of the controller 2; the rear line frame 1 is clamped to the controller 2 from the structure through the cooperation of the buckle 24 and the clamping groove 25, the assembly is simple, the screws for fixing the controller 2 are saved, the materials and labor are reduced, and the cost is reduced.
[0037] As shown in Figure 1 The top of the controller 2 is provided with a socket 26 and a jack, the jack is connected with the functional line 4, the socket 26 is inserted with the motor lead 15, one end of the functional line 4 and the motor lead 15 is connected with the same plug 17, the end of the motor lead 15 is provided with a plug-in structure I matched with the socket 26, the plug-in structure I can be well welded on the controller 2 through the internal plug pin, the end of the functional lead is provided with a plug-in structure II, the plug pin on the plug-in structure II is inserted into the jack on the controller 2, so that the motor lead 15 and the functional line 4 can be firmly connected with the controller 2, and will not be broken due to repeated bending and disassembly.
[0038] As shown in Figure 4 and Figure 7 A plurality of positioning blocks 27 are fixedly installed on the inner wall of the iron shell 5, the bottom of the stator core 8 is movably abutted with the top of the positioning block 27, a positioning strip 28 is opened on the inner wall of the iron shell 5, a strip-shaped groove 29 is opened on the outer side of the rotor core 14, and the positioning strip 28 is matched with the strip-shaped groove 29.
[0039] A stop position 31 is arranged on the inner wall of the iron shell 5, which is used for supporting the iron back cover 3 and limiting it, a notch position 32 is opened at the top of the iron shell 5, a convex point 33 is arranged on the iron back cover 3, the convex point 33 is matched with the notch position 32, the bottom of the iron shell 5 and the top of the iron back cover 3 are both provided with a convex shell 30, the bearing 10 is movably clamped in the corresponding convex shell 30, the iron back cover 3 is axially positioned by the stop position 31 on the iron shell 5, the convex point 33 on the iron back cover 3 is matched with the notch position 32 on the iron shell 5 to radially position the iron back cover 3, and the axial and radial anti-fool assembly of the iron back cover 3 and the iron shell 5 is realized.
[0040] In the specific assembly, firstly, the rotor mechanism is inserted from the bottom of the front frame 13, i.e. from below the stator mechanism, and then the bearing 10 is installed outside the central shaft 11 after the combination is completed; secondly, the combination of the stator and the rotor is placed in the iron shell 5, the bearing 10 below the central shaft 11 is clamped into the protruding shell 30 on the iron shell 5, at the same time, the bottom of the front frame 13 is in movable abutment with the inner wall of the bottom of the iron shell 5, the bottom of the stator core 8 is in movable abutment with the top of the positioning block 27, and the positioning strip 28 on the inner wall of the iron shell 5 is clamped into the strip-shaped slot 29 on the stator core 8; finally, the iron back cover 3 is fixedly connected with the iron shell 5 through the embedded claw structure, the embedded claw structure comprises a protruding claw-shaped structure on the outer shell and a recess on the iron back cover 3, the bearing 10 above the central shaft 11 is clamped into the protruding shell 30 on the iron back cover, the iron back cover 3 presses the silica gel pad 12 so as to achieve the purpose of pressing the stator mechanism, and in subsequent repair, the combination of the stator and the rotor can be taken out only by disassembling the iron back cover 3, while the traditional stator mechanism and the outer shell are bonded by using glue, and the above-mentioned mode avoids damage caused when the stator mechanism is taken out.
[0041] Of course, the present application can also have other various embodiments, and based on the present embodiment, other embodiments obtained by those skilled in the art without any creative labor belong to the scope of protection of the present application.
Claims
1. A brushless micro motor with a built-in controller, surface-mount magnets, and a DC internal rotor, characterized in that, The device includes an iron shell, a stator mechanism, and a rotor mechanism. The stator mechanism is slidably sleeved on the outside of the rotor mechanism, and the iron shell is slidably sleeved on the outside of the stator mechanism. A metal rear cover is movably snapped onto the top of the iron shell. The metal rear cover is used to press the rotor mechanism and electronic mechanism into the iron shell for easy disassembly of the entire device. The rotor mechanism includes a central shaft and a rotor core. Two bearings are arranged on the outside of the central shaft. The rotor core is fixedly sleeved on the outside of the central shaft. Multiple magnets are arranged on the outside of the rotor core. There is a gap between the magnets and the stator core to reduce the motor cogging torque and reduce motor noise.
2. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 1, characterized in that, Multiple positioning ribs are evenly arranged on the outer side of the rotor core. A snap-fit groove is formed between the rotor core and two adjacent positioning ribs. The magnet is movably snapped into the corresponding snap-fit groove. Two protective magnetic rings are fixedly sleeved on the outer side of the rotor core.
3. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 1, characterized in that, The rotor core is fixedly connected to a rear balance block and a front balance block at its top and bottom ends, respectively, and the rear balance block and the front balance block are tightly fitted to one side of the corresponding magnetic ring.
4. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 1, characterized in that, The stator mechanism includes a stator core, a rear conductor frame, and a front conductor frame. A circular hole is provided at the center of the top of the stator core, and multiple fan-shaped holes are provided at the top edge of the stator core. The fan-shaped holes are connected to the circular hole. Multiple plug-in tubes are provided on one side of both the rear conductor frame and the front conductor frame. The cross-section of the plug-in tubes is fan-shaped and matches the fan-shaped holes. Anti-misbehavior posts are provided on the rear conductor frame, and anti-misbehavior grooves are provided on the top of the stator core. The anti-misbehavior posts are adapted to the anti-misbehavior grooves.
5. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 4, characterized in that, A controller is placed on the top of the rear cable tray. The controller has a positioning groove. The rear cable tray has a positioning post. The positioning groove and the positioning post are adapted to each other. The top of the rear cable tray has several buckles. The top edge of the controller has several slots. The buckles and the slots are adapted to each other. A silicone pad is placed on the top of the controller. The silicone pad is located below the iron back cover.
6. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 5, characterized in that, The top of the controller is equipped with a socket and a jack. A function wire is connected to the jack, and a motor lead is plugged into the socket. One end of the function wire and the motor lead are connected to the same plug.
7. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 4, characterized in that, Multiple positioning blocks are fixedly installed on the inner wall of the iron shell. The bottom of the stator core is movably abutted against the top of the positioning block. Positioning strips are provided on the inner wall of the iron shell. Strip grooves are provided on the outer side of the rotor core. The positioning strips are adapted to the strip grooves.
8. The built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 1, characterized in that, The inner wall of the iron shell is provided with a stop for supporting and limiting the iron back cover. The top of the iron shell is provided with a notch, and the iron back cover is provided with a protrusion that matches the notch.
9. A built-in controller, surface-mount magnet, and DC internal rotor brushless micro motor according to claim 1, characterized in that, Both the bottom of the iron shell and the top of the iron rear cover are provided with raised shells, and the bearing is movably engaged in the corresponding raised shell.