Hall sensor mounting structure

Abstract

The utility model relates to a Hall sensor mounting structure, which comprises a rotor core, a plurality of axially arranged iron core teeth are constructed on the periphery of the rotor core at intervals, iron core grooves are formed between adjacent iron core teeth, a circuit board is fixedly arranged above the iron core grooves, and a plurality of Hall sensors are arranged in the iron core grooves below the circuit board. Elastic buckles are integrally formed on the two sides of a shell of the Hall sensor, two opposite clamping grooves are formed in the positions, on the side walls of the iron core teeth, in the iron core groove, and the Hall sensor can move in the axial direction and stretch into the iron core groove so that the elastic buckles and the clamping grooves can form buckle connection. According to the scheme, the two elastic buckles are arranged on the two sides of the shell of the Hall sensor in an injection molding mode, the two corresponding clamping grooves are formed in the side wall of the iron core tooth on the inner side of the iron core groove, when the Hall is installed, the Hall is inserted into the iron core groove in the axial direction, the elastic buckles will be extruded to deform, and when the Hall is inserted into the clamping grooves, the elastic buckles and the clamping grooves are matched to form buckle connection; therefore, the accuracy of the Hall installation position is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a mounting structure of a Hall sensor. Background Art

[0002] In the design of motors, Hall sensors often need to be installed in the exact middle position of the core slot opening. Generally, the core slot opening is wider than the Hall sensor. During installation, the Hall sensor is in a suspended state and its position is not fixed. Then, the Hall sensor is fixed through a dispensing or potting process. This technology has the following problems:

[0003] ①, The installation position accuracy of the Hall sensor is poor, and it cannot accurately reflect the position of the rotor;

[0004] ②, It is difficult to replace the Hall sensor because it is fixed with glue;

[0005] ③, Due to its suspended state, the process operation is difficult when fixing with glue;

[0006] ④, There is no radial constraint, and it is easy to exceed the core and cause rubbing. Summary of the Invention

[0007] In order to solve the above problems, the purpose of the utility model is to provide a mounting structure of a Hall sensor. By injecting two elastic buckles on both sides of the outer shell of the Hall sensor, corresponding card slots are opened on the side walls of the core slots of the rotor core. The Hall sensor is positioned inside the core slot through the snap connection between the elastic buckles and the card slots. The installation position accuracy is high, and it can accurately reflect the position of the rotor. At the same time, the snap connection method is convenient for disassembly and assembly, and is convenient for the installation and replacement of the Hall sensor.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A mounting structure of a Hall sensor, including a rotor core. Insulating plates are correspondingly arranged at both axial ends of the rotor core. A plurality of axially arranged core teeth are spaced around the periphery of the rotor core. Core slots are formed between adjacent core teeth. Insulating paper is inserted into the core slots. Coils are wound on the core teeth outside the insulating plates and the insulating paper. A circuit board is fixed above the coils. A plurality of Hall sensors are arranged in the core slots below the circuit board. The upper ends of the Hall sensors are fixed to the circuit board through multiple pins. The distances from the Hall sensors to the side walls of the core teeth on the left and right sides are equal; The characteristics are as follows:

[0010] The Hall sensor includes an outer shell and a Hall sensor body arranged inside the outer shell. Elastic buckles are integrally formed on both sides of the outer shell. Two opposite card slots are arranged on the side walls of the core teeth in the core slots. The card slots are located outside the coils. The Hall sensor can axially move into the core slots so that the elastic buckles and the card slots form a snap connection.

[0011] In the above technical solution, two elastic buckles are injection-molded on both sides of the housing of the Hall sensor, and two corresponding card slots are opened on the side walls of the iron core teeth inside the iron core slot. When installing the Hall, the Hall is inserted axially into the iron core slot, and the elastic buckles will be squeezed and deformed. When it is inserted into the position of the card slot, the elastic buckles and the card slots cooperate to form a snap connection, thus ensuring the accuracy of the installation position of the Hall. The cooperation method is tight, so that the Hall sensor can be stably located in the middle position near the slot opening of the iron core slot, and then can accurately reflect the position of the rotor, avoiding the problem that when the Hall is fixed by gluing with the Hall suspended, the Hall shakes and causes poor installation position accuracy, and then cannot accurately reflect the position of the rotor. At the same time, the problem of difficult operation of the gluing and fixing process is solved. In addition, the elastic buckles cooperate with the card slots and are radially limited to prevent the risk of the Hall exceeding the rotor iron core and being swept.

[0012] Preferably, the elastic buckle includes a buckle main body formed on the housing and a block formed on the outer end of the buckle main body. The block is adaptively clamped with the card slot. An intensifying block is formed upward at the upper end of the buckle main body. A step is formed between the intensifying block and the block, and the step abuts against the upper inner wall of the card slot. In this technical solution, an intensifying block is formed on the elastic buckle, and the intensifying block can improve the structural strength of the elastic buckle and prevent the elastic buckle from breaking during the deformation process.

[0013] Preferably, the buckle main body is an upwardly curved arc-shaped block, and the upper and lower ends of the arc-shaped block respectively form an upper arc surface and a lower arc surface, and the concave surfaces of the upper arc surface and the lower arc surface face the Hall sensor. In this technical solution, the buckle main body is an upwardly curved arc-shaped block, making the elastic buckle easier to deform and further preventing the elastic buckle from breaking.

[0014] Preferably, a part of the upper arc surface extends to form the inner side surface of the intensifying block. In this technical solution, a part of the upper arc surface extends to form the inner side surface of the intensifying block, which makes the integrity between the intensifying block and the buckle main body good. At the same time, the upper arc surface is extended to improve the overall deformation ability of the elastic buckle.

[0015] Preferably, a part of the lower arc surface extends to form the lower end surface of the block. In this technical solution, a part of the lower arc surface extends to form the lower end surface of the block, which is convenient for the lower end of the block to slide out of the card slot along the edge of the card slot, and then the whole block can be taken out, facilitating the replacement of the Hall sensor. At the same time, the lower arc surface is extended to improve the overall deformation ability of the elastic buckle.

[0016] Preferably, the outer side surface of the intensifying block is an inclined surface and forms an angle with the side wall of the iron core tooth. In this technical solution, the outer side surface of the intensifying block forms an angle with the side wall of the iron core tooth, so that when the block slides out of the card slot, friction between the intensifying block and the side wall of the iron core tooth is avoided, facilitating the block to slide out of the card slot.

[0017] Preferably, the circuit board is an arc-shaped circuit board with the same arc as that of the rotor core portion. In this technical solution, the circuit board is an arc-shaped circuit board with the same arc as that of the rotor core portion, so that a plurality of Hall sensors can be arranged at the exact middle position near the notch in each core slot, facilitating the installation of the Hall sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic perspective view of a Hall sensor mounting structure.

[0019] Figure 2 FIG. 2 is a schematic perspective view of a Hall sensor mounting structure from another perspective.

[0020] Figure 3 FIG. 3 Figure 1 is an enlarged schematic view of part A in FIG. 1.

[0021] Figure 4 FIG. 4 is a schematic perspective view of the Hall sensor.

[0022] Figure 5 FIG. 5 is a schematic layout view of the card slots on the rotor core.

[0023] Figure 6 FIG. 6 Figure 5 is an enlarged schematic view of part B in FIG. 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0029] As Figures 1 - 6 shown, a Hall sensor mounting structure includes a rotor iron core 1. Insulating plates 16 are correspondingly provided at both axial ends of the rotor iron core 1. A plurality of axially arranged iron core teeth 2 are spaced around the rotor iron core 1. Iron core slots 3 are formed between adjacent iron core teeth 2. Insulating paper 4 is inserted into the iron core slots 3. Coils 5 are wound on the iron core teeth 2 outside the insulating plates 16 and the insulating paper 4. A circuit board 6 is fixedly provided above the coils 5. A number of Hall sensors 7 are provided in the iron core slots 3 below the circuit board 6. The upper ends of the Hall sensors 7 are fixed to the circuit board 6 through a plurality of pins. The distances from the Hall sensors 7 to the side walls of the iron core teeth 2 on the left and right sides are equal; the Hall sensors 7 include a housing and a Hall sensor body provided inside the housing. Elastic buckles 8 are integrally formed on both sides of the housing. Two opposite card slots 9 are provided on the side walls of the iron core teeth 2 in the iron core slots 3. The card slots 9 are located outside the coils 5. The Hall sensors 7 can axially move into the iron core slots 3 so that the elastic buckles 8 and the card slots 9 form a snap connection.

[0030] In the above technical solution, two elastic buckles are injection-molded on both sides of the housing of the Hall sensor, and two corresponding card slots are formed on the side walls of the iron core teeth inside the iron core slot. When installing the Hall, the Hall is inserted axially into the iron core slot, and the elastic buckles will be deformed by extrusion. When it is inserted into the position of the card slot, the elastic buckles and the card slots cooperate to form a snap connection. The cooperation method is tight, so that the Hall sensor can be stably located at the exact middle position near the slot opening in the iron core slot, thus ensuring the accuracy of the Hall installation position. Furthermore, it can accurately reflect the rotor position, avoiding the problem that when the Hall is fixed by gluing with the Hall suspended, the Hall shakes, resulting in poor installation position accuracy and thus unable to accurately reflect the rotor position. At the same time, the problem of difficult operation in the gluing and fixing process is solved. In addition, the elastic buckles cooperate with the card slots and are radially limited to prevent the risk of the Hall exceeding the rotor iron core and being swept by the stator teeth.

[0031] Further, the elastic buckle 8 includes a buckle main body 10 formed on the housing and a clamping block 11 formed on the outer end of the buckle main body 10. The clamping block 11 is adaptively clamped with the card slot 9. An enhancing block 12 is formed upward at the upper end of the buckle main body 10. A step 13 is formed between the enhancing block 12 and the clamping block 11, and the step 13 abuts against the upper inner wall of the card slot 9. In this technical solution, an enhancing block is formed on the elastic buckle, and the enhancing block can improve the structural strength of the elastic buckle and prevent the elastic buckle from breaking during the deformation process.

[0032] Further, the buckle main body 10 is an upwardly curved arc-shaped block, and an upper arc surface 14 and a lower arc surface 15 are respectively formed at the upper and lower ends of the arc-shaped block. The concave surfaces of the upper arc surface 14 and the lower arc surface 15 face the Hall sensor 7. In this technical solution, the buckle main body is an upwardly curved arc-shaped block, making the elastic buckle easier to deform and further preventing the elastic buckle from breaking.

[0033] Further, a part of the upper arc surface 14 extends to form the inner side surface of the enhancing block 12. In this technical solution, a part of the upper arc surface extends to form the inner side surface of the enhancing block, so that the integrity between the enhancing block and the buckle main body is good. At the same time, the upper arc surface is extended, improving the overall deformation ability of the elastic buckle.

[0034] Further, a part of the lower arc surface 15 extends to form the lower end surface of the clamping block 11. In this technical solution, a part of the lower arc surface extends to form the lower end surface of the clamping block, facilitating the lower end of the clamping block to slide out of the card slot along the edge of the card slot, and then enabling the whole clamping block to be disengaged, which is convenient for the replacement of the Hall sensor. At the same time, the lower arc surface is extended, improving the overall deformation ability of the elastic buckle.

[0035] Further, the outer side surface of the enhancing block 12 is a slope and forms an angle with the side wall of the iron core tooth 2. In this technical solution, the outer side surface of the enhancing block forms an angle with the side wall of the iron core tooth, so that when the clamping block slides out of the card slot, friction between the enhancing block and the side wall of the iron core tooth is avoided, facilitating the clamping block to slide out of the card slot.

[0036] Further, the circuit board 6 is an arc-shaped circuit board with an arc consistent with a part of the arc of the rotor core 1. In this technical solution, the circuit board is an arc-shaped circuit board with an arc consistent with a part of the arc of the rotor core, so that a plurality of Hall sensors can be arranged at the exact middle position near the notch in each core slot, which is convenient for the installation of the Hall sensors.

[0037] In this specific embodiment, for the installation of the existing Hall sensors, since they are suspended in the core slots, when fixing with glue,

[0038] the Hall sensors will shake, and thus there are problems: the installation position accuracy of the Hall is poor and it cannot accurately reflect the rotor position; and it is difficult to replace the Hall by fixing with glue; and the process operation is difficult when fixing with glue; and there is no radial constraint, and it is easy to exceed the core and cause a problem of stator sweeping. In the above solution, two elastic buckles are injection-molded on both sides of the housing of the Hall sensor, and two corresponding card slots are opened on the side wall of the core tooth on the inner side of the core slot. When installing the Hall, the Hall is inserted into the core slot along the axial direction, and the elastic buckles will be squeezed and deformed. Until when it is inserted into the card slot position, the card blocks of the elastic buckles cooperate with the card slots to form a snap connection, and the cooperation method is tight, so that the Hall sensor can be stably located at the exact middle position near the notch in the core slot, thereby ensuring the accuracy of the Hall installation position, and then being able to accurately reflect the rotor position. Moreover, by installing the Hall sensor with snap connections, the installation is convenient and it is also easy to disassemble, solving the problems of difficult process operation when fixing with glue and difficult replacement of the Hall after fixing with glue. In addition, the elastic buckles cooperate with the card slots, and are radially limited, preventing the risk of the Hall exceeding the rotor core and being swept by the stator.

[0039] It should be noted here that a foam block can be bundled and fixed and inserted between the circuit board and the coil, and the circuit board is bundled on the foam block again, or the circuit board is adhesively fixed above the coil.

[0040] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model without departing from the principles and spirit of the present utility model.

Claims

1. A Hall sensor installation structure, comprising a rotor core (1), wherein insulating plates (16) are provided at both axial ends of the rotor core (1), a plurality of axially arranged core teeth (2) are constructed at intervals on the outer periphery of the rotor core (1), core slots (3) are formed between adjacent core teeth (2), insulating paper (4) is inserted into the core slots (3), a coil (5) is wound around the core teeth (2) on the outer sides of the insulating plates (16) and the insulating paper (4), a circuit board (6) is fixed above the coil (5), a plurality of Hall sensors (7) are provided below the circuit board (6) in the core slots (3), the upper ends of the Hall sensors (7) are fixed to the circuit board (6) via a plurality of pins, and the distances from the Hall sensors (7) to the side walls of the core teeth (2) on the left and right sides are equal; characterized in that: The Hall sensor (7) comprises a housing and a Hall sensor body arranged in the housing, elastic buckles (8) are integrally formed on both sides of the housing, two opposing buckles (9) are arranged on the side walls of the iron core teeth (2) in the iron core slot (3), the buckle slots (9) are located outside the coil (5), and the Hall sensor (7) can be moved axially into the iron core slot (3) so that the elastic buckle (8) and the buckle slot (9) form a buckle connection.

2. A Hall sensor installation structure according to claim 1, characterized in that: The elastic buckle (8) comprises a buckle body (10) formed on the outer shell and a clamping block (11) formed on the outer end of the buckle body (10), the clamping block (11) being adapted to be clamped in the clamping slot (9), a reinforcing block (12) being formed upward at the upper end of the buckle body (10), a step (13) being formed between the reinforcing block (12) and the clamping block (11), the step (13) being against the inner wall of the upper end of the clamping slot (9).

3. A Hall sensor installation structure according to claim 2, characterized in that: The buckle body (10) is an upwardly curved arc block, with the upper and lower ends of the arc block forming an upper arc surface (14) and a lower arc surface (15) respectively, and the concave surfaces of the upper arc surface (14) and the lower arc surface (15) face the Hall sensor (7).

4. A Hall sensor installation structure according to claim 3, characterized in that: Part of the upper curved surface (14) extends to form the inner side surface of the reinforcement block (12).

5. A Hall sensor installation structure according to claim 3, characterized in that: Part of the lower arc surface (15) extends to form the lower end surface of the clamping block (11).

6. A Hall sensor installation structure according to claim 4, characterized in that: The outer side surface of the reinforcement block (12) is an inclined surface and forms an angle with the side wall of the core tooth (2).

7. A Hall sensor installation structure according to claim 1, characterized in that: The circuit board (6) is an arc-shaped circuit board whose curvature is consistent with the curvature of a portion of the rotor core (1).

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