Stator structure of eddy current angle position sensor for rotating shaft

Abstract

The utility model provides a structure of an eddy current angle position sensor stator for a rotating shaft and application thereof, and relates to the angle position detection technology for the rotating shaft. A plastic shell is removed, and the LED lamp is only composed of a PCB and potting glue. A winding coil and an electronic element are arranged on the PCB, the winding coil is matched with a rotor of the eddy current position sensor on the rotating shaft, glue pouring is carried out at least on the electronic element on one side or two sides of the PCB, and the pouring glue strengthens the rigidity and protects the winding coil and / or the electronic element. According to the utility model, through the structural change, a stator plastic shell is removed, the mold opening cost and period are removed, and the material cost and the process cost are reduced.

Description

Technical Field

[0001] The utility model relates to an angle position detection technology for a rotating shaft, in particular to a stator structure of an eddy current angle position sensor. Background Art

[0002] At present, the motors needed in many fields such as industry, automotive electronics, aerospace, etc. all need to measure the angle of the motor shaft and control the rotation position of the motor shaft; many types of gearboxes, such as automobile gearboxes, need to measure the speed and angle of the power output and input shafts; various internal combustion engines such as diesel engines, gasoline engines, and natural gas engines need to measure the shaft position to determine the top dead center of the piston in order to achieve precise injection advance angle control; various gas turbines also need to measure the speed and angle of the shaft to achieve power control; the steering wheel steering shaft also needs to know the shaft angle.

[0003] In order to achieve accurate measurement of the rotation angle of the shaft, an angle position sensor is needed for perception, and the eddy current angle position sensor is a new type of sensor for measuring the angle position of the shaft. The advantages of eddy current position sensors include good reliability (can completely replace the rotary transformer position sensor), high measurement accuracy, applicable to higher speeds, lower cost, better electromagnetic compatibility, self-decoding, etc. This eddy current position sensor has been maturely applied in new energy drive motors. Foreign countries have mass-produced this type of sensor in 2021, and domestic manufacturers are currently basically in the sample stage.

[0004] The eddy current angle position sensor consists of two parts, namely the stator and the rotor. The stator is fixed on the shell, and the rotor is fixed on the shaft. The existing eddy current angle position sensor stator generally consists of three parts: plastic shell, PCB board, and glue potting. The plastic shell is made of mold injection, the PCB board is placed inside the plastic shell, and the surface is covered with winding coils and electronic components are welded. The side of the PCB board that is not wrapped by the shell is all glued.

[0005] Due to the wide variety of motors and their different sizes, a stator of an eddy current angle position sensor of one size cannot be adapted to more motors, and it is necessary to change the motor structure, or re-open the mold and change the sensor stator housing structure. Utility Model Content

[0006] The purpose of the utility model is to make up for the deficiencies in the prior art and propose a structure of a stator for an eddy current angle position sensor for a rotating shaft. Specifically, the stator removes the plastic shell and is only composed of a PCB board and glue potting. The PCB board is provided with a winding coil and an electronic component, and the winding coil is matched with the eddy current position sensor rotor on the rotating shaft. Glue is potted on one side or both sides of the PCB board at least at the electronic component, and the potting glue strengthens the rigidity and protects the winding coil and / or the electronic component. A hole is opened in the middle of the PCB board or no hole is opened.

[0007] The utility model has the following main effects: removing the stator plastic shell, removing the mold opening cost and cycle, and reducing the material cost and process cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram of stator installation of shaft-end type eddy current position sensor of the utility model;

[0009] Figure 2 Schematic diagram of the position of the stator winding coil and electronic components of the through-axis eddy current position sensor of the utility model;

[0010] Figure 3 Schematic diagram of single-side potting of the stator of the through-shaft eddy current position sensor of the utility model;

[0011] Figure 4 Schematic diagram of double-sided potting of the stator of the through-axis eddy current position sensor of the utility model;

[0012] Figure 5 Schematic diagram of the utility model of the through-shaft eddy current position sensor in which the stator is only potted with electronic components;

[0013] Figure 6 Schematic diagram of the position of the stator winding coil and electronic components of the shaft-end type eddy current position sensor of the utility model;

[0014] Figure 7 Schematic diagram of single-side potting of the stator of the shaft-end type eddy current position sensor of the utility model;

[0015] Figure 8 Schematic diagram of double-sided potting of the stator of the shaft-end type eddy current position sensor of the utility model;

[0016] Fig. 9 Schematic diagram of the utility model shaft end type eddy current position sensor stator only potting electronic components;

[0017] In the figure: 1- potting glue; 2- PCB board; 3- electronic components; 4- mounting surface; 5- shaft end type eddy current position sensor stator; 6- end cover; 7- rotating shaft; 8- shaft end type eddy current position sensor rotor; 9- bearing; 10- winding coil; DETAILED DESCRIPTION

[0018] The structure of the stator of the eddy current angle position sensor for the rotating shaft of the utility model is only composed of a PCB board 2 and a potting glue 1. The PCB board 2 has an increased thickness to maintain a certain rigidity, and the PCB board 2 has one or more mounting holes. The potting glue 1 is coated on the surface of the PCB board to enhance the rigidity and protect the winding coil 10 and the electronic components 3. Figure 1 This is a schematic diagram of the stator installation of the shaft-end type eddy current position sensor of the utility model; Figure 2 This is a schematic diagram of the position of the stator winding coil and electronic components of the through-axis eddy current position sensor of the utility model; Figure 6 This is a schematic diagram of the position of the stator winding coil and electronic components of the shaft-end type eddy current position sensor of the utility model;

[0019] Embodiment 1: Figure 3 The schematic diagram of the stator single-side potting of the through-shaft eddy current position sensor of the utility model is shown in FIG. The potting glue 1 is coated on the surface of one side of the PCB board 2, and the coating is partial; the PCB board 2 has a mounting hole 4 and a corresponding mounting surface 4, and the mounting surface 4 is not potted with glue; the PCB board 2 has a hole in the middle;

[0020] Embodiment 2: Figure 4 The schematic diagram of the double-sided potting of the stator of the through-axis eddy current position sensor of the utility model is shown in FIG. The potting glue 1 is coated on the surfaces of both sides of the PCB board 2, and the coating is local; the PCB board 2 has 4 mounting holes and corresponding mounting surfaces 4; the mounting surface 4 is not potted; the PCB board 2 has a hole in the middle;

[0021] Embodiment 3: Figure 5 This is a schematic diagram of the stator of the through-axis eddy current position sensor of the utility model only encapsulating electronic components. The winding coils are distributed in the inner layer of the PCB board. The encapsulating glue 1 is coated on the lower half of one side of the PCB board 2, covering only the electronic components 3. The PCB board 2 has 4 mounting holes and corresponding mounting surfaces 4. The mounting surface 4 is not encapsulated with glue. The PCB board 2 has a hole in the middle.

[0022] Embodiment 4: Figure 7 The schematic diagram of the one-side potting of the stator of the shaft-end type eddy current position sensor of the utility model is shown in FIG. The potting glue 1 is coated on the surface of one side of the PCB board 2, and the coating is partial; the PCB board 2 has three mounting holes and corresponding mounting surfaces 4; the mounting surface 4 is not potted; and the PCB board 2 has no hole in the middle;

[0023] Embodiment 5: Figure 8 The schematic diagram of the double-sided potting of the stator of the shaft-end type eddy current position sensor of the utility model is shown in FIG. The potting glue 1 is coated on the surfaces of both sides of the PCB board 2, and the coating is partial; the PCB board 2 has three mounting holes and corresponding mounting surfaces 4; the mounting surface 4 is not potted; and the PCB board 2 has no hole in the middle;

[0024] Embodiment 6: Fig. 9 This is a schematic diagram of the stator of the shaft-end type eddy current position sensor of the utility model only encapsulating electronic components. The encapsulating glue 1 is coated on the lower half of one side of the PCB board 2, and only covers the electronic components 3. The PCB board 2 has three mounting holes and corresponding mounting surfaces 4. The mounting surface 4 is not encapsulated with glue. There is no hole in the middle of the PCB board 2.

[0025] A transmission mechanism includes a fixed part, a rotating part, and an angle position sensor device. An electric mechanical device includes a drive device, a transmission device, an actuator, a sensing device, a control device, and the transmission mechanism.

[0026] In this specification, the eddy current position sensor stator mentioned is the component of the eddy current position sensor fixed to the housing.

[0027] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the utility model concept. The protection scope of the utility model should not be deemed to be limited to the specific forms described in the embodiments. The protection scope of the utility model also includes equivalent technical means that can be thought of by those skilled in the art based on the concept of the utility model.

Claims

1. A structure of a stator of an eddy current angle position sensor for a rotating shaft, characterized in that: It is only composed of a PCB board and potting glue. The PCB board is provided with winding coils and electronic components. The winding coils cooperate with the eddy current position sensor rotor on the rotating shaft. Glue is poured on one side or both sides of the PCB board at least at the electronic components. The potting glue enhances the rigidity and protects the winding coils and / or electronic components.

2. The structure of the stator of the eddy current angle position sensor for the rotating shaft according to claim 1 is characterized in that: The winding coils are distributed on the inner layer of the PCB board.

3. The structure of the stator of the eddy current angle position sensor for the rotating shaft according to claim 1 is characterized in that: The PCB board is provided with one or more mounting holes.

4. The structure of the stator of the eddy current angle position sensor for the rotating shaft according to claim 1 is characterized in that: Perform local glue filling on one or both sides of the PCB board.

5. The structure of the stator of the eddy current angle position sensor for the rotating shaft according to claim 4 is characterized in that The mounting surface is not glued.

6. The structure of the stator of the eddy current angle position sensor for the rotating shaft according to claim 2 or 3, characterized in that: The thickness of the PCB board is greater than 1 mm, and a hole is opened in the middle of the PCB board or no hole is opened in the middle of the PCB board.

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