Hall component fixed structure

Abstract

The utility model relates to a Hall component fixing structure, including a coil frame, a fan-shaped Hall plate is provided on the end surface of the coil frame, a Hall mounting seat is provided at a position corresponding to a short arc edge on the end surface of the Hall plate, a curved surface coaxially arranged with the motor shaft is provided on the side of the Hall mounting seat close to the motor shaft, the Hall plate is connected and fixed to the coil frame by screws, a plurality of fixed grooves coaxially arranged with the arc track of the curved surface and evenly distributed are distributed on the Hall mounting seat, and a Hall element is fixed in the fixed groove. The utility model has the characteristics of making the concentricity of the Hall component relative to the motor shaft more accurate and stable.

Description

Technical Field

[0001] The utility model relates to a Hall component fixing structure and belongs to the technical field of motors. Background Art

[0002] Brushless DC motors have been fully applied in various fields. In order to detect the rotor position in the current DC motor control technology, electromagnetic induction using motor Hall element components, software programming to calculate the position (without motor Hall element components), and photoelectric induction are usually used. Electromagnetic induction using motor Hall element components is currently the most commonly used and mature technology, and can accurately control the start and stop of the motor.

[0003] A motor Hall element fixing bracket is disclosed in a Chinese patent application with publication number CN204947837U, comprising a long strip fixing bracket body matching the outer cylindrical surface of a stator core, a motor Hall element assembly mounting platform being provided on the outer side of the fixing bracket body, at least two bracket mounting positions matching the outer cylindrical surface of the stator core being provided on the fixing bracket body on the side of the motor Hall element assembly mounting platform, a first boss matching the groove on the outer cylindrical surface of the stator core being provided on the bracket mounting position and / or a second boss matching the notch between two adjacent windings on the outer cylindrical surface of the stator core being provided on the bracket mounting position.

[0004] The Hall element fixing frame in the above-mentioned prior art is fixed on the outside of the stator core, which occupies the radial installation space of the motor and cannot ensure the more precise concentricity of the Hall element relative to the motor shaft, affecting the precise sensing of the Hall element to the motor magnetic field. Utility Model Content

[0005] The utility model aims to provide a Hall component fixing structure, which solves the problems existing in the prior art such as failure to accurately ensure concentricity.

[0006] The above technical purpose of the utility model is mainly solved by the following technical solutions: a Hall component fixing structure, including a coil skeleton, a fan-shaped Hall plate is provided on the end surface of the coil skeleton, a Hall mounting seat is provided at a position corresponding to the short arc side on the end surface of the Hall plate, a curved surface coaxially arranged with the motor shaft is provided on the side of the Hall mounting seat close to the motor shaft, the Hall plate is connected and fixed to the coil skeleton by screws, and a plurality of fixed grooves are distributed on the Hall mounting seat, which are arranged concentrically with the arc track of the curved surface and are evenly distributed, and a Hall element is fixed in the fixed groove; the above-mentioned Hall mounting seat and the Hall plate are combined and formed, and the curved surface setting of the Hall mounting seat can adapt to the concentric structure of the Hall plate and the motor shaft, avoid the Hall mounting seat from interfering with the rotation of the motor shaft, and reduce the space occupied by the motor, and the Hall element is fixed in the fixed groove which is arranged concentrically with the arc track line of the curved surface and is evenly distributed, so that the distribution of the Hall element is positioned by the Hall mounting seat, so that the structural setting of the distribution of the Hall element and the motor shaft can be realized through the Hall mounting seat and the Hall fixing plate, so that the concentricity of the Hall component relative to the motor shaft is more accurate and stable.

[0007] Preferably, the short arc side of the Hall plate is kept flush with the inner edge of the Hall mounting seat; the short arc side of the Hall plate is kept flush with the inner edge of the Hall mounting seat, so that the Hall mounting seat and the inner side of the Hall plate are consistent, so as to facilitate the concentric positioning of the Hall mounting seat and the Hall plate, and fixation and positioning are more convenient.

[0008] Preferably, a plurality of evenly distributed first support parts are provided at the outer edge of the coil skeleton, a plurality of first support parts are provided with threaded holes on the top, and a fixing hole corresponding to the threaded hole is provided on the Hall plate, and the fixing hole and the threaded hole can be connected and fixed by screws; the above-mentioned first support part can support and fix the Hall plate, so that the Hall plate can be connected and fixed to the first support part by screws, thereby ensuring the stable position of the Hall plate.

[0009] Preferably, the first supporting parts where each two of the threaded holes are located are separated by two first supporting parts with protruding columns on the top, and the Hall plate is provided with through holes corresponding to the protruding columns; the above-mentioned protruding columns can cooperate with the through holes on the Hall plate to locate the installation position of the Hall plate, which is convenient for the precise assembly of the Hall plate, increases the positioning effect of the Hall plate when tightening the screws, avoids the displacement of the Hall plate, improves the installation accuracy of the Hall plate, and at the same time increases the installable positions of the Hall plate, so that the Hall plate can be installed at the circumferential position of the motor shaft as needed and ensures the concentricity of the Hall plate and the Hall element.

[0010] Preferably, a plurality of evenly distributed second support parts are provided at the inner edge of the coil skeleton, a convex part is provided on the top of the second support part corresponding to the first support part provided with the convex column, a connecting groove corresponding to the convex part is provided on the Hall plate, and an adhesive is filled between the convex part and the connecting groove; the above-mentioned second support part can cooperate with the first support part to increase the supporting stability of the Hall plate, and enhance the fixing effect of the Hall plate through the cooperation between the convex part and the connecting groove, and at the same time, the convex part and the connecting groove are filled with adhesive, which can further enhance the fixing reliability of the Hall plate on the first support part and the second support part, avoid loosening of the Hall plate, and ensure the stability and precision of the concentricity of the Hall assembly.

[0011] Therefore, the utility model has the characteristics of making the concentricity of the Hall assembly relative to the motor shaft more accurate and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure of the Hall plate and Hall mount. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0015] like Figure 1-2 As shown, a Hall component fixing structure includes a coil skeleton 1, a fan-shaped Hall plate 2 is provided on the end surface of the coil skeleton 1, a Hall mounting seat 21 is provided on the end surface of the Hall plate 2 at a position corresponding to the short arc edge, a curved surface 211 coaxially arranged with the motor shaft is provided on the side of the Hall mounting seat 21 close to the motor shaft, the Hall plate 2 is connected and fixed to the coil skeleton 1 by screws, a plurality of fixing grooves 22 are distributed on the Hall mounting seat 21, which are cocentrically arranged with the arc trajectory of the curved surface 211 and are evenly distributed, a Hall element 221 is fixed in the fixing groove 22, and the short arc edge of the Hall plate 2 is kept flush with the inner edge of the Hall mounting seat 21.

[0016] The above-mentioned coil skeleton is fixed on the inner side of the motor casing, the Hall plate is fixed on the top of the coil skeleton in a fan-shaped structure, and the Hall mounting seat is fixed on the inner side of the top surface of the Hall plate near the short arc edge. The Hall mounting seat and the Hall plate are connected and fixed by screws or by pins. The arc surface on the inner side of the Hall mounting seat is kept flush with the short arc edge of the Hall plate. The Hall mounting seat is kept concentrically set relative to the motor shaft by the concentric setting of the Hall plate and the motor shaft, and the Hall plate is fixed to the coil skeleton by screws to keep the position of the Hall plate fixed. A plurality of fixing grooves are evenly distributed on the top surface of the Hall mounting seat. In this embodiment, three fixing grooves are provided, and Hall elements are fixed in the fixing grooves. The pins of the Hall element pass through the bottom of the fixing groove and are welded to the Hall plate. The position of the Hall element is evenly distributed around the axis of the motor shaft to ensure the concentricity of the distribution of the Hall element position relative to the motor shaft.

[0017] like Figure 1-2 As shown, a plurality of evenly distributed first support portions 11 are provided at the outer edge of the coil skeleton 1, and threaded holes 111 are provided on the tops of the plurality of first support portions 11. A fixing hole 23 corresponding to the threaded hole 111 is provided on the Hall plate 2, and the fixing hole 23 and the threaded hole 111 can be fixed by screw connection, and two first support portions 11 with protruding columns 112 on the tops are separated between each two first support portions 11 where the threaded holes 111 are located, and a through hole 24 corresponding to the protruding columns 112 is provided on the Hall plate 2, and a plurality of evenly distributed second support portions 12 are provided at the inner edge of the coil skeleton 1, and a protrusion 121 is provided on the top of the second support portion 12 corresponding to the first support portion 11 with the protruding columns 112, and a connecting groove 25 corresponding to the protrusion 121 is provided on the Hall plate 2, and an adhesive is filled between the protrusion 121 and the connecting groove 25.

[0018] The first support part and the second support part are respectively integrally formed at the top of the coil frame, and a boss is arranged on the top of two adjacent first support parts. A threaded hole is arranged on the top of the other first support part outside the two first support parts with the boss. The fixing hole on the Hall plate is connected with the threaded hole, and the screw can pass through the fixing hole and the threaded hole to tighten the thread to fix the Hall plate. The boss is stuck in the through hole on the Hall plate to position the Hall plate. The above-mentioned adhesive is set with glue, and the convex part on the second support part is stuck in the connecting groove. The connecting groove and the convex part are bonded by adhesive to strengthen the fixing strength of the Hall plate.

Claims

1. A Hall component fixing structure, characterized in that: The invention comprises a coil frame (1), a fan-shaped Hall plate (2) is provided on the end surface of the coil frame (1), a Hall mounting seat (21) is provided on the end surface of the Hall plate (2) at a position corresponding to a position close to a short arc edge, a curved surface (211) coaxially arranged with the motor shaft is provided on the side of the Hall mounting seat (21) close to the motor shaft, the Hall plate (2) is connected and fixed to the coil frame (1) by screws, a plurality of fixed grooves (22) coaxially arranged with the arc track of the curved surface (211) and evenly distributed are distributed on the Hall mounting seat (21), and a Hall element (221) is fixed in the fixed groove (22).

2. The Hall assembly fixing structure according to claim 1, characterized in that: The short arc side of the Hall plate (2) is kept flush with the inner edge of the Hall mounting seat (21).

3. The Hall assembly fixing structure according to claim 1, characterized in that: A plurality of evenly distributed first support portions (11) are provided at the outer edge of the coil skeleton (1), threaded holes (111) are provided at the tops of the plurality of first support portions (11), and fixing holes (23) corresponding to the threaded holes (111) are provided on the Hall plate (2), and the fixing holes (23) and the threaded holes (111) can be fixed by screw connection.

4. The Hall assembly fixing structure according to claim 3, characterized in that: Two first support parts (11) with protruding columns (112) disposed on top are spaced apart between each two first support parts (11) where the threaded holes (111) are located, and through holes (24) corresponding to the protruding columns (112) are disposed on the Hall plate (2).

5. The Hall assembly fixing structure according to claim 1, characterized in that: A plurality of evenly distributed second support portions (12) are provided at the inner edge of the coil skeleton (1); a convex portion (121) is provided at the top of the second support portion (12) corresponding to the first support portion (11) provided with the convex column (112); a connecting groove (25) corresponding to the convex portion (121) is provided on the Hall plate (2); and an adhesive is filled between the convex portion (121) and the connecting groove (25).

Images