Brushless motor Hall fixing structure
By combining the stator core, coil frame, Hall plate, and Hall bracket, the problem of complex Hall element fixing is solved, achieving the effects of simplified production, reduced costs, and improved motor performance.
Patent Information
- Application Number
- CN202422858370.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The existing methods for fixing Hall elements in brushless motors are complex, resulting in high production costs and inconvenient maintenance. This is especially true for segmented stator cores, which require numerous molds and are cumbersome to manufacture.
It adopts a combined structure of stator core, coil frame, Hall plate and Hall bracket, and achieves precise positioning and stable connection through positioning columns and connectors, simplifying the assembly process. The detachable installation facilitates maintenance.
This achieves precise matching between the Hall element and the stator core, reducing production costs, improving assembly efficiency, facilitating maintenance, extending motor lifespan, and enhancing motor performance stability and flexibility.
Smart Images
Figure CN223567474U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of brushless motors, in particular to a brushless motor Hall fixing structure. BACKGROUND
[0002] The brushless DC motor powered by the livestock battery has low application voltage, and the corresponding wire diameter of the winding is relatively large. In the manufacturing process, a block type stator core is used to improve the degree of automation of winding.
[0003] The Hall is an element for sensing the position of the motor rotor on the motor. When installing, the Hall element needs to be positioned to ensure accurate detection of the position of the motor rotor. At present, the fixing methods of the Hall element are various. Usually, a groove is opened on the stator core to place and fix the Hall element, or the Hall plate is directly fixed on the stator core. Although the two fixing methods can accurately position the Hall element, for the block type stator core, two sets of molds need to be opened for the punching sheet, the stator core is complex to manufacture, resulting in the problems of complicated production process and high cost. SUMMARY
[0004] In order to make the brushless DC motor Hall element fixing structure have the characteristics of high positioning accuracy, simple structure and simple processing, the present application provides a brushless motor Hall fixing structure.
[0005] The brushless motor Hall fixing structure provided by the present application adopts the following technical scheme:
[0006] A brushless motor Hall fixing structure, comprising a stator core, a coil framework, a Hall plate, and a Hall bracket, wherein the coil framework is assembled with the stator core, the Hall plate is assembled with the top end of the coil framework, the Hall plate is vertically provided with a positioning hole, the top surface of the Hall bracket is fixed with a positioning column, the positioning column passes through the positioning hole, one side of the Hall plate is fixed with a Hall element, and the Hall bracket is used for fixing and protecting the Hall element.
[0007] By adopting the above technical scheme, the positioning column passes through the positioning hole on the Hall plate, accurate alignment and stable connection between the Hall bracket and the Hall plate are realized, and the phenomenon of loosening or displacement of the parts during the operation of the motor is effectively reduced. The Hall bracket can provide stable support and protection for the Hall element to prevent damage to the Hall element by external factors, thereby ensuring the stable operation of the brushless motor and helping to prolong the service life of the brushless motor.
[0008] Compared with the prior art, the bottom end of the coil framework is assembled with the stator core, the top end of the coil framework is assembled with the Hall plate, the positioning column of the Hall support passes through the positioning hole on the Hall plate, the assembly between the stator core, the coil framework, the Hall plate and the Hall support can be realized, the assembly process is simple and easy to operate, two sets of molds are avoided, the production cost is saved, the precise cooperation between the Hall element and the stator core can be achieved, the detachable installation enables the components to be repeatedly disassembled, the subsequent maintenance work is facilitated, and the production demand is met.
[0009] Preferably, the stator core has a plurality of stator cores, and the plurality of stator cores are assembled with the Hall plate after being circularly spliced.
[0010] Through the above technical scheme, the plurality of stator cores are assembled with the Hall plate after being circularly spliced, so that the motor is more convenient to maintain or replace components, meanwhile, the number of stator cores can be adjusted by workers according to actual needs to realize different motor performance, and the detachable assembly makes the entire brushless motor have higher flexibility and expandability.
[0011] Preferably, the coil framework is vertically provided with a first mounting hole, and the center of the first mounting hole is on the same straight line as the center of the teeth of the stator core.
[0012] Through the above technical scheme, the center of the first mounting hole is on the same straight line as the center of the teeth of the stator core, so that the coil framework and the stator core are accurately aligned, thereby improving the operation efficiency and performance stability of the motor, and the accurate alignment can reduce magnetic leakage and magnetic resistance to some extent, so that the motor can more efficiently convert electric energy and mechanical energy during operation, and improve energy utilization efficiency.
[0013] Preferably, the Hall plate is vertically provided with a second mounting hole, the center of the second mounting hole is aligned with the center of the first mounting hole of the coil framework, a connecting piece is arranged between the second mounting hole and the first mounting hole, and the Hall plate is fixed to the coil framework through the connecting piece.
[0014] Through the above technical scheme, the center of the second mounting hole of the Hall plate is aligned with the center of the first mounting hole of the coil framework, and then the connecting piece is used for fixation, so that the Hall plate and the coil framework are firmly connected, the relative position stability between the Hall plate and the coil framework is ensured, and structural loosening or displacement caused by motor operation vibration is effectively reduced.
[0015] Preferably, the bottom of the Hall support is provided with a positioning block, a positioning groove is formed between the adjacent two stator cores, and the positioning block is elastically matched with the positioning groove.
[0016] By adopting the technical scheme, the positioning block and the positioning groove are elastically matched, the Hall support is provided with accurate positioning function, the Hall support can be quickly and accurately positioned to the predetermined position in the installation process, the assembly efficiency and precision of the Hall support and the stator core can be improved, meanwhile, the connection stability between the Hall support and the stator core can be enhanced, the vibration and noise in the motor operation process can be reduced, and the overall performance and service life of the motor are improved.
[0017] Preferably, the Hall plate is provided with a positioning device matched with the Hall support.
[0018] Preferably, the Hall support is provided with a fixing groove, one end of the Hall element away from the Hall plate is inserted into the fixing groove, and the pin of the Hall element is soldered and fixed on the Hall plate.
[0019] By adopting the technical scheme, the pin of the Hall element is soldered and fixed on the Hall plate, and the other end is directly inserted into the fixing groove, the connection of the Hall support, the Hall element and the Hall plate is realized, the fixing groove provides the end of the Hall element with limiting and fixing functions, the position of the Hall element is kept stable in the motor operation process, the damage or performance decline of the Hall element caused by vibration or impact is effectively reduced, the assembly process of the Hall support and the Hall element is simplified by adopting the installation mode of mutual insertion, the production efficiency is improved, and the subsequent maintenance is facilitated.
[0020] Preferably, an elastic backrest is vertically installed on the Hall support at a position close to the fixing groove, and a through groove is formed through the backrest.
[0021] By adopting the technical scheme, the design of the backrest provides elastic support for the Hall element, the Hall element can be easily clamped in the fixing groove, the installation convenience and efficiency of the Hall element are improved, meanwhile, the vibration and impact in the motor operation process are absorbed, the Hall element is protected from damage, and the service life thereof is prolonged. The through groove is formed, the elasticity is increased, the contact area of the Hall element and the backrest is reduced, and the installation convenience of the Hall element is further improved.
[0022] Preferably, a reverse buckle is fixed on one side of the backrest close to the fixing groove, a space for clamping the Hall element is left between the bottom end of the reverse buckle and the groove bottom of the fixing groove, when the Hall element is inserted into the fixing groove, the inner top surface of the Hall element abuts against the bottom surface of the reverse buckle, and one side wall of the Hall element abuts against the side wall of the reverse buckle.
[0023] By adopting the technical scheme, the space between the reverse buckle and the fixing groove provides a stable clamping position for the Hall element, ensures the position stability and reliability of the Hall element after assembly, and can reduce displacement or falling of the Hall element due to external force, and the inner top surface of the Hall element abuts against the bottom surface of the reverse buckle, and the side wall of the Hall element abuts against the side wall of the reverse buckle, forming multi-surface constraint, which can further enhance the fixing effect of the Hall element, so as to reduce shaking and micro-motion of the Hall element during operation, and help to improve the stability of the Hall element output signal.
[0024] Preferably, a plurality of fixing grooves are arranged on the Hall bracket, and the included angle between two adjacent fixing grooves is A, A = 360 / (m.p), wherein m is the number of motor phases, and p is the number of motor pole pairs.
[0025] By adopting the technical scheme, the fixing grooves are arranged at an angle A, which allows the Hall element to be fixed at multiple angles, which helps to improve the control accuracy and response speed of the motor to some extent, and at the same time, this arrangement also helps to maintain the compactness of the entire structure.
[0026] In summary, the present application has the following at least one beneficial technical effect:
[0027] 1. By assembling the bottom end of the coil skeleton with the stator core, assembling the top end of the coil skeleton with the Hall plate, and passing the positioning column of the Hall bracket through the positioning hole on the Hall plate, the assembly between the stator core, the coil skeleton, the Hall plate, and the Hall bracket can be realized, the assembly process is simple and easy to operate, two sets of molds are not required, production costs are saved, accurate cooperation between the Hall element and the stator core can be achieved, and the detachable installation allows repeated disassembly between components, which is convenient for subsequent maintenance work and meets production requirements;
[0028] 2. By aligning the center of the second mounting hole of the Hall plate with the first mounting hole of the coil skeleton and then fixing them through the connecting piece, firm connection between the Hall plate and the coil skeleton can be realized, the relative position stability between the two is ensured, structural loosening or displacement caused by motor operation vibration is effectively reduced, the screw connection method is adopted, which is convenient for assembly during production and provides convenience for subsequent maintenance and disassembly, thereby helping to reduce maintenance costs;
[0029] 3. The end of the Hall element away from the Hall plate is directly inserted into the fixing groove, the fixing groove provides limiting and fixing effects for the end of the Hall element, so that the Hall element maintains a stable position during motor operation, effectively reducing damage or performance degradation of the Hall element due to vibration or impact, and the mutual insertion installation method simplifies the assembly process of the Hall bracket and the Hall element, improves production efficiency, and is convenient for subsequent maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 is the overall structure schematic diagram of the brushless motor hall fixed structure in the embodiment of the application.
[0031] Figure 2 is Figure 1 the exploded view.
[0032] Figure 3 is the assembly schematic diagram of the stator core, coil skeleton, and stator coil in the embodiment of the application.
[0033] Figure 4 is the structure schematic diagram of the hall bracket in the embodiment of the application.
[0034] Figure 5 is Figure 4 the rear view.
[0035] BRIEF DESCRIPTION OF DRAWINGS: 1, hall bracket; 11, positioning column; 12, fixed groove; 13, backrest; 14, through groove; 15, reverse buckle; 16, positioning block; 2, coil skeleton; 21, first mounting hole; 22, stator coil; 3, hall plate; 31, positioning hole; 32, hall element; 33, second mounting hole; 4, stator core; 41, positioning groove; 5, connecting screw. DETAILED DESCRIPTION
[0036] The application will be described in further detail below with reference to the accompanying Figures 1-5 The application will be described in further detail below with reference to the accompanying
[0037] The embodiment of the application discloses a brushless motor hall fixed structure.
[0038] With reference to Figure 1 and Figure 2 , a brushless motor hall fixed structure, comprising a stator core 4, a coil skeleton 2, a hall plate 3, and a hall bracket 1, the bottom end of the coil skeleton 2 is assembled with the stator core 4, the top end of the coil skeleton 2 is assembled with the hall plate 3, the hall plate 3 is vertically and throughly provided with a positioning hole 31, the top surface of the hall bracket 1 is fixed with a positioning column 11, the positioning column 11 passes through the positioning hole 31, one side of the hall plate 3 is fixed with a hall element 32, the hall element 32 is welded and fixed at the contact position of the hall plate 3, and the hall bracket 1 is used for fixing and protecting the hall element 32.
[0039] The application can realize the assembly between the stator core 4, the coil skeleton 2, the hall plate 3, and the hall bracket 1 by assembling the bottom end of the coil skeleton 2 with the stator core 4, assembling the top end of the coil skeleton 2 with the hall plate 3, and making the positioning column 11 of the hall bracket 1 pass through the positioning hole 31 on the hall plate 3, so that the assembly process is simple and easy to operate, and meanwhile, the precise cooperation between the hall element 32 and the stator core 4 can be achieved.
[0040] Referring to Figure 2 And Figure 3 In this application, there are multiple stator cores 4, and the multiple stator cores 4 are assembled with the Hall plate 3 after being spliced into a circle, so that the motor is more convenient to maintain or replace parts, and the staff can also adjust the number of stator cores 4 according to actual needs to realize different motor performance.
[0041] Specifically, the positioning column 11 on the top surface of the Hall bracket 1 is provided with multiple positioning columns 11, the multiple positioning columns 11 are distributed equidistantly, and the top end of the positioning column 11 is chamfered, so as to provide a guiding effect for the positioning column 11 passing through the positioning hole 31, and improve the installation efficiency of the two.
[0042] Further, in order to realize the stable installation of the stator core 4, the coil skeleton 2 and the Hall plate 3, referring to Figure 2 And Figure 3 One stator core 4 is assembled with two coil skeletons 2 at the same time, one coil skeleton 2 is clamped at the top end of the stator core 4, and the other coil skeleton 2 is clamped at the bottom end of the stator core 4, the two coil skeletons 2 tightly hold the stator core 4, the end surfaces of the two coil skeletons 2 close to each other are abutted, and then the stator coil 22 is taken and wound on the outer wall of the two coil skeletons 2, thereby realizing the close connection of one stator core 4 and two coil skeletons 2.
[0043] The coil skeleton 2 is vertically and throughly provided with a first mounting hole 21, the center of the first mounting hole 21 is on the same straight line with the tooth center of the stator core 4, so as to accurately align the coil skeleton 2 and the stator core 4, at the same time, the Hall plate 3 is vertically and throughly provided with a second mounting hole 33, the second mounting hole 33 is aligned with the center of the first mounting hole 21 of the coil skeleton 2, and a connecting piece is arranged between the two, in this application, the specific structure of the connecting piece is not limited, but it is required to have the ability to connect the coil skeleton 2 and the Hall plate 3 together, here, the connecting piece is a connecting screw 5, and the Hall plate 3 is fixed with the coil skeleton 2 through the connecting screw 5.
[0044] In this application, the center of the second mounting hole 33 of the Hall plate 3 is aligned with the center of the first mounting hole 21 of the coil skeleton 2, and then fixed by the connecting screw 5, so as to realize the firm connection between the Hall plate 3 and the coil skeleton 2, ensure the relative position stability between the two, adopt the screw connection mode, facilitate the assembly in the production process, and provide convenience for subsequent maintenance and disassembly, thereby helping to reduce maintenance cost.
[0045] More specifically, referring to Figure 2 And Figure 4The bottom of the Hall bracket 1 is provided with a positioning block 16, a positioning groove 41 is formed between the adjacent two stator cores 4, the positioning block 16 is elastically matched with the positioning groove 41, the Hall bracket 1 is provided with accurate positioning function, the Hall bracket 1 can be quickly and accurately positioned to the predetermined position in the installation process, the connection stability between the Hall bracket 1 and the stator core 4 can be further enhanced, the vibration and noise in the motor operation process can be reduced, and the overall performance and service life of the motor are improved.
[0046] In the application, the coil framework 2 close to the Hall plate 3 is arranged side by side with the Hall bracket 1, the block type multiple stator cores 4 are spliced to form a circular stator, the coil framework 2 is distributed in the outer circle, the Hall bracket 1 is distributed in the inner circle, and the Hall plate 3 covers the stator coil 22 wound on the coil framework 2, so that the exposure of the stator coil 22 is reduced.
[0047] In order to realize the stable installation of the Hall element 32, referring to Figure 2 and Figure 5 , the Hall bracket 1 is provided with a fixing groove 12, the Hall bracket 1 is vertically installed with a backrest 13 with elasticity close to the fixing groove 12, a through groove 14 is formed through the backrest 13, a reverse buckle 15 is fixed on one side of the backrest 13 close to the fixing groove 12, and the Hall plate 3 is provided with a positioning device matched with the Hall bracket 1, specifically, the space for clamping the Hall element 32 is left between the bottom end of the reverse buckle 15 and the groove bottom of the fixing groove 12, the end of the Hall element 32 away from the Hall plate 3 is inserted into the fixing groove 12, the inner top surface of the Hall element 32 abuts against the bottom surface of the reverse buckle 15, and the side wall of the Hall element 32 abuts against the side wall of the reverse buckle 15, and at the same time, the pin of the Hall element 32 is soldered and fixed on the Hall plate 3.
[0048] More specifically, the Hall bracket 1 is a bracket made of flexible thermal insulation material, the fixing groove 12 on the Hall bracket 1 is provided with multiple, the included angle between the two adjacent fixing grooves 12 is A, A=360 / (m.p), wherein m is the number of motor phases, and p is the number of motor pole pairs, the included angle between the two adjacent fixing grooves 12 shown in the drawings of the application specification is 30°, the Hall element 32 is allowed to be fixed at multiple angles, so that the whole structure remains compact, which helps to improve the control accuracy and response speed of the motor.
[0049] In the present application, the Hall bracket 1 is made of flexible heat insulation material, the elastic backrest 13, the setting of the through slot 14 are all set to facilitate the Hall element 32 to be easily clamped in the fixed slot 12, and the setting of the fixed slot 12 and the reverse buckle 15 provides a stable clamping position for the Hall element 32, ensures the position stability and reliability of the Hall element 32 after assembly, can reduce the displacement or falling of the Hall element 32 due to external force, reduce the effect of shaking and micro-motion of the Hall element 32 in the working process, and effectively improve the stability of the output signal of the Hall element 32. At the same time, the Hall bracket 1 made of flexible heat insulation material has good heat insulation performance, can effectively isolate the influence of the high temperature generated in the motor on the Hall element 32, ensure that the Hall element 32 works in the appropriate temperature range, avoid damage due to overheating, and thus improve the durability and reliability of the entire fixing structure.
[0050] The above are preferred embodiments of the present application, and the embodiments are only an explanation of the present application, not to limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A Hall effect fixing structure for a brushless motor, characterized in that, The system includes a Hall bracket (1), a coil frame (2), a Hall plate (3), and a stator core (4). The coil frame (2) is assembled with the stator core (4), and the Hall plate (3) is assembled with the top of the coil frame (2). The Hall plate (3) is vertically oriented and has a through-hole (31). A positioning post (11) is fixed on the top surface of the Hall bracket (1), and the positioning post (11) passes through the positioning hole (31). A Hall element (32) is fixed on one side of the Hall plate (3). The Hall bracket (1) is used to fix and protect the Hall element (32). The bottom of the Hall bracket (1) is provided with a positioning block (16), and a positioning groove (41) is formed between two adjacent stator cores (4). The positioning block (16) and the positioning groove (41) are elastically engaged. The Hall plate (3) is provided with a positioning device that cooperates with the Hall bracket (1); The Hall bracket (1) has a fixing groove (12), and the end of the Hall element (32) away from the Hall plate (3) is inserted into the fixing groove (12), and the pins of the Hall element (32) are soldered to the Hall plate (3).
2. The brushless motor Hall effect fixing structure according to claim 1, characterized in that, There are multiple stator cores (4), and the multiple stator cores (4) are assembled into a circle and then detachably assembled with the Hall plate (3).
3. The brushless motor Hall effect fixing structure according to claim 2, characterized in that, The coil frame (2) has a first mounting hole (21) that is vertical and extends through it. The center of the first mounting hole (21) is on the same straight line as the tooth center of the stator core (4).
4. The brushless motor Hall effect fixing structure according to claim 3, characterized in that, The Hall plate (3) has a second mounting hole (33) that extends vertically through it. The second mounting hole (33) is aligned with the center of the first mounting hole (21) of the coil frame (2). A connector is provided between the two, and the Hall plate (3) is fixed to the coil frame (2) through the connector.
5. The brushless motor Hall effect fixing structure according to claim 1, characterized in that, The Hall bracket (1) is vertically mounted with an elastic backrest (13) near the fixing groove (12), and a through groove (14) is provided on the backrest (13).
6. The brushless motor Hall effect fixing structure according to claim 5, characterized in that, The backrest (13) is fixed with a buckle (15) on the side near the fixing groove (12). There is a space between the bottom end of the buckle (15) and the bottom of the fixing groove (12) for the Hall element (32) to engage. When the Hall element (32) is inserted into the fixing groove (12), the inner top surface of the Hall element (32) abuts against the bottom surface of the buckle (15), and one side wall of the Hall element (32) abuts against the side wall of the buckle (15).
7. The brushless motor Hall effect fixing structure according to claim 1, characterized in that, The Hall bracket (1) has multiple fixing slots (12), and the included angle between two adjacent fixing slots (12) is A, where A = 360 / (mp), m is the number of motor phases and p is the number of motor pole pairs.