A hall magnetoelectric angular displacement sensor

Abstract

The application relates to the technical field of angle measurement sensing, in particular to a Hall magnetoelectric type angle displacement sensor which comprises a fixed shell, a rotating core shaft, a magnetic ring assembly, an elastic contact piece assembly and an angle transmission mechanism. The rotating core shaft is arranged at the center of the fixed shell and is connected with an external rotating part; the magnetic ring assembly is sleeved on the rotating core shaft and rotates with the rotating core shaft; the elastic contact piece assembly is fixed to the inner wall of the fixed shell and cooperates with the magnetic ring assembly; and the angle transmission mechanism is connected with the elastic contact piece assembly and outputs an angle reading. The magnetic ring assembly comprises a main magnetic ring, the end face of which is alternately provided with N and S poles; the elastic contact piece assembly is deflected by the magnetic field; and the angle transmission mechanism outputs the angle through gear transmission. The sensor can realize full-angle measurement, is resistant to pollution, has high precision and long service life.

Description

Technical Field

[0001] This application relates to the field of angle measurement and sensing technology, and in particular to a Hall effect magnetoelectric angle displacement sensor. Background Technology

[0002] In modern industrial production and the operation of precision equipment, accurate measurement of angular displacement is crucial for ensuring stable system operation. Currently, among commonly used angle displacement sensors on the market, photoelectric sensors offer high measurement accuracy but suffer from significant technical limitations. Photoelectric sensors typically consist of a light source, a grating disk, and a photosensitive element. Their working principle involves the alternating changes in light transmission and blocking as the grating disk rotates, causing the photosensitive element to generate pulse signals to calculate the angle. However, this structure requires extremely clean working environments. If dust, oil, or other impurities enter the sensor, they directly block the light transmission path, causing disorder in the light signal received by the photosensitive element and leading to measurement errors. In industrial settings, especially dusty and oily environments such as machine shops and automotive engine compartments, the optical components of photoelectric sensors are easily contaminated. This not only requires frequent shutdowns for cleaning and maintenance, increasing equipment operating costs and downtime, but also, if cleaning is not timely or thorough, can lead to prolonged periods of inaccurate measurement by the sensor, affecting the overall system's accuracy and stability. In addition, the light source of photoelectric sensors has a certain lifespan. After long-term use, the brightness of the light source will decrease, further reducing the reliability of the measurement. This problem is particularly prominent on continuously operating production lines, which seriously restricts its widespread application in complex industrial environments.

[0003] To address this problem, a Hall effect magnetoelectric angular displacement sensor was invented. Utility Model Content

[0004] The present invention aims to provide a Hall effect magnetoelectric angle displacement sensor to solve the problem that existing photoelectric angle displacement sensors are easily contaminated in complex environments such as dusty and oily environments, resulting in decreased measurement accuracy and high maintenance costs. The invention aims to provide an angle displacement detection device that can work stably in harsh environments, measure accurately, and has a long service life.

[0005] This application provides a Hall effect magnetoelectric angle displacement sensor, which adopts the following technical solution: it includes a fixed housing, a rotating spindle, a magnetic ring assembly, an elastic contact assembly, and an angle transmission mechanism; the rotating spindle is rotatably disposed at the center of the fixed housing, and one end of it extends out of the fixed housing and is connected to an external rotating component; the magnetic ring assembly is sleeved on the rotating spindle and rotates synchronously with it; the elastic contact assembly is fixed to the inner wall of the fixed housing and cooperates with the magnetic ring assembly; the angle transmission mechanism is connected to the elastic contact assembly and outputs an angle reading.

[0006] Optionally, the magnetic ring assembly includes a main magnetic ring, on the end face of which a plurality of N poles and S poles are alternately arranged at intervals.

[0007] Optionally, the elastic contact assembly can sense changes in the magnetic field on the outer circumference of the main magnetic ring and deflect accordingly. It includes a fixed rod, a support rod on the fixed rod, a vertical slot on the support rod, a slidable sliding block in the vertical slot, a rotatable hinge rod on the sliding block, a swing contact on the hinge rod, a swing shaft at the bottom of the swing contact, a torsion spring mounted on the swing shaft, and the torsion spring positioned between the support rod and the swing contact.

[0008] Optionally, the oscillating contact is made of a magnetically conductive material.

[0009] Optionally, the angle transmission mechanism includes a transmission rod hinged to a sliding block, a first pinion gear on a support rod, the transmission rod being eccentrically hinged to the end face of the first pinion gear, a second large gear meshing with the first pinion gear inside the fixed housing, a third pinion gear coaxially disposed on the end face of the second large gear, a fourth large gear meshing with the third pinion gear inside the fixed housing, and an angle indicator needle coaxially disposed on the fourth large gear located outside the fixed housing.

[0010] In summary, this application includes the following beneficial technical effects: Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the device;

[0012] Figure 2 This is a side view of the device;

[0013] Figure 3 This is a top view of the device;

[0014] Figure 4 This is a cross-sectional schematic diagram of the overall structure of this device;

[0015] Figure 5 This is a schematic diagram of the elastic contact assembly of this device;

[0016] The components include: 1. Fixed housing; 2. Rotating spindle; 3. Magnetic ring assembly; 4. Elastic contact assembly; 5. Angle transmission mechanism; 6. Main magnetic ring; 7. Fixed rod; 8. Support rod; 9. Vertical slot; 10. Sliding block; 11. Hinge rod; 12. Swinging contact; 13. Swinging shaft; 14. Torsion spring; 15. Transmission rod; 16. First pinion; 17. Second large gear; 18. Third pinion; 19. Fourth large gear; and 20. Angle indicator needle. Detailed Implementation

[0017] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0018] Reference Figure 1 , Figure 3 , Figure 4 One embodiment shown is as follows: The angular displacement sensor is entirely enclosed by a fixed housing 1. A rotating spindle 2 passes through the fixed housing 1, its central axis coinciding with the central axis of the fixed housing 1. The rotating spindle 2 is connected to the fixed housing 1 via a high-precision bearing. This connection method allows the rotating spindle 2 to rotate flexibly within the fixed housing 1, ensuring stability and coaxiality during rotation and reducing measurement errors caused by rotational deviations. One end of the rotating spindle 2 extends from the fixed housing 1, and this extended end is firmly connected to an external rotating component via a coupling or other connecting parts, ensuring that the rotation of the external rotating component is accurately transmitted to the rotating spindle 2. A magnetic ring assembly 3 is fitted onto the portion of the rotating spindle 2 located within the fixed housing 1. The inner hole of the magnetic ring assembly 3 is tightly fitted to the rotating spindle 2, for example, through an interference fit, allowing the magnetic ring assembly 3 to rotate synchronously with the rotating spindle 2 without relative displacement between them. An elastic contact assembly 4 is installed inside the fixed housing 1, its position corresponding to the magnetic ring assembly 3, to achieve effective cooperation between the two. One end of the angle transmission mechanism 5 is connected to the elastic contact assembly 4, and the other end extends to the outside of the fixed housing 1 for outputting angle readings.

[0019] The implementation principle of the above embodiment is as follows: the external rotating component drives the rotating spindle 2 to rotate, the rotating spindle 2 drives the magnetic ring assembly 3 to rotate synchronously, and the magnetic ring assembly 3 generates a changing magnetic field during the rotation process. The elastic contact assembly 4 senses the change in magnetic field and generates a corresponding action. Its action is transmitted through the angle transmission mechanism 5 and converted into an angle reading output, thereby realizing the measurement of the angular displacement of the external rotating component.

[0020] Reference Figure 1 , Figure 4One embodiment shown is as follows: In the aforementioned magnetic ring assembly 3, the main magnetic ring 6 is a key component. The main magnetic ring 6 is cylindrical, and its central hole is tightly fitted and connected to the rotating spindle 2, ensuring that the main magnetic ring 6 rotates with the rotating spindle 2. On one end face of the main magnetic ring 6, multiple N poles and S poles are alternately distributed along the circumferential direction. For example, a magnetization process can be used to divide the end face of the main magnetic ring 6 into several sector-shaped regions, with adjacent sector-shaped regions being filled with N poles and S poles respectively. This distribution method causes the magnetic field on the outer circumferential surface of the main magnetic ring 6 to exhibit periodic changes during rotation.

[0021] The implementation principle of the above embodiment is as follows: when the main magnetic ring 6 rotates with the rotating spindle 2, the magnetic field on its outer circumference changes periodically. The elastic contact assembly 4 can sense this magnetic field change, thus providing a basis for subsequent measurement of angular displacement. Through this alternating arrangement of N and S poles, a regularly changing magnetic field signal can be generated, improving the accuracy and stability of angle measurement.

[0022] Reference Figure 1 , Figure 5 One embodiment shown is as follows: The elastic contact assembly 4 uses a fixed rod 7 as the basic component. The fixed rod 7 is fixed to the inner wall of the fixed housing 1 by welding or bolting to ensure its stable position. Vertical support rods 8 are fixedly connected to the top two sides of the fixed rod 7, and the two are perpendicular to each other. The connection method can be welding or threaded connection to ensure connection strength. A slot is opened on the support rod 8 along the vertical direction, which provides a movement track for the sliding block 10. The sliding block 10 is set in the vertical slot 9, and through the matching structure such as dovetail groove, the sliding block 10 can slide smoothly up and down in the vertical slot 9. A hinge rod 11 is connected to the sliding block 10 through a hinge shaft, and the hinge rod 11 can rotate flexibly around the hinge shaft. At the end of the hinge rod 11 away from the fixed rod 7, a swing contact 12 is installed through a swing shaft 13, and the swing contact 12 can swing around the swing shaft within a certain angle range. A torsion spring 14 is mounted on the swing shaft. The two ends of the torsion spring 14 abut against the support rod 8 and the swing contact 12, respectively, providing a restoring force to the swing contact 12. When the swing contact 12 is deflected by an external force, the torsion spring 14 generates a reverse torque, so that the swing contact 12 can return to its initial position after the force is removed.

[0023] The implementation principle of the above embodiment is as follows: When the magnetic field on the outer circumference of the main magnetic ring 6 changes, the swing contact 12 is deflected by the magnetic force due to the change in the induced magnetic field. The deflection of the swing contact 12 drives the bottom swing shaft to rotate, and at the same time causes the sliding block 10 connected to it to slide in the vertical slot 9. The sliding of the sliding block 10 is transmitted to the angle transmission mechanism 5 through the hinge rod 11, thereby realizing the response to the change in magnetic field and converting it into a change in mechanical displacement. The torsion spring 14 ensures that the swing contact 12 can be reset after the change in magnetic field disappears, so as to continuously sense new changes in magnetic field.

[0024] Reference Figure 1 , Figure 2 , Figure 5 One embodiment shown is as follows: In the swing contact 12 portion of the aforementioned elastic contact assembly 4, the swing contact 12 is made of a magnetically conductive material such as a soft magnetic alloy. The swing contact 12 is connected to the support rod 8 via a swing shaft, and its overall structure is located near the outer circumferential surface of the main magnetic ring 6 to better sense changes in the magnetic field. Because a magnetically conductive material is used, the swing contact 12 can effectively sense the magnetic field generated by the main magnetic ring 6, and compared to non-magnetically conductive materials, it enhances the response sensitivity to changes in the magnetic field.

[0025] The implementation principle of the above embodiment is as follows: when the magnetic field on the outer circumference of the main magnetic ring 6 changes, the swing contact 12 made of magnetic conductive material can quickly sense the change in magnetic field. Under the action of magnetic force, it is easier to deflect, thereby driving the entire elastic contact assembly 4 to move, providing a more accurate signal input for angular displacement measurement, and improving the sensor's sensing accuracy and response speed to changes in magnetic field.

[0026] Reference Figure 2 , Figure 5One embodiment shown is as follows: In the angle transmission mechanism 5, one end of the transmission rod 15 is connected to the sliding block 10 via a hinge shaft, ensuring that the two can rotate relative to each other, so that the linear motion of the sliding block 10 can be smoothly transmitted to the transmission rod 15. The other end of the transmission rod 15 is eccentrically hinged to the end face of the first pinion 16. Specifically, an eccentric hole is opened on the end face of the first pinion 16, and the transmission rod 15 is connected to the first pinion 16 via a pin. In this way, when the transmission rod 15 moves with the sliding block 10, it can drive the first pinion 16 to rotate around its central axis. The first pinion 16 is mounted on the support rod 8 and can rotate flexibly through bearings and other components. The first pinion 16 meshes with the second large gear 17 inside the fixed housing 1, and the teeth of the two are tightly engaged to ensure stable power transmission. A third pinion 18 is coaxially fixedly connected to the end face of the second large gear 17, and the two rotate synchronously. The third pinion 18 meshes with the fourth large gear 19 inside the fixed housing 1. The central shaft of the fourth gear 19 extends to the outside of the fixed housing 1. An angle indicator needle 20 is fixed on the central shaft and rotates synchronously with the fourth gear 19. A scale is fixedly installed on the outside of the fixed housing 1.

[0027] The implementation principle of the above embodiment is as follows: When the sliding block 10 slides in the vertical slot 9, it drives the transmission rod 15 to move. The eccentric hinge structure of the transmission rod 15 converts the linear motion of the sliding block 10 into the rotation of the first pinion 16. The first pinion 16 drives the second large gear 17 to rotate through meshing with the second large gear 17, which in turn drives the coaxial third pinion 18 to rotate. The third pinion 18 then meshes with the fourth large gear 19, which finally causes the fourth large gear 19 to rotate, driving the angle indicator needle 20 fixed on its central axis to rotate. The displacement change of the elastic contact assembly 4 is converted into the rotation angle of the angle indicator needle 20, thereby outputting the angle reading and realizing the measurement and display of the angle displacement.

[0028] Specifically, when the sliding block 10 reciprocates up and down within the vertical slot 9, the transmission rod 15 drives the first pinion 16 to rotate continuously via the eccentric pin. For example, when the sliding block 10 moves from the top to the bottom, the transmission rod 15 pushes the eccentric pin to rotate half a revolution around the axis of rotation of the first pinion 16, causing the first pinion 16 to rotate 180° clockwise. When the sliding block 10 moves from the bottom to the top, the transmission rod 15 pulls the eccentric pin to continue rotating half a revolution around the axis of rotation, causing the first pinion 16 to continue rotating 180° clockwise. Through this reciprocating drive, the first pinion 16 achieves a continuous 360° circular motion. After the continuous rotation of the first pinion 16 is transmitted through multiple gears, the fourth large gear 19 drives the angle indicator needle 20 to rotate continuously. The angle indicator needle 20 and the fourth large gear 19 are rigidly connected coaxially, and their rotation speeds are the same. The rotation angle of the indicator needle is directly proportional to the angular displacement of the external rotating component.

[0029] Specific motion conversion and indication principle: When the sliding block 10 moves to its uppermost position (upper limit position): at this time, the transmission rod 15 is in its shortest extension state, and the eccentric pin is located directly to the left of the rotation axis of the first pinion 16. When the sliding block 10 is about to start moving downward, the transmission rod 15 pushes the eccentric pin to move downward to the right, and the first pinion 16 rotates clockwise. Through gear transmission, the indicator needle rotates clockwise synchronously, and the rotation angle at this time is recorded as the initial value;

[0030] When the sliding block 10 moves down to the lowest point (lower limit position): the sliding block 10 completes one downward linear motion, the transmission rod 15 pulls the eccentric pin to rotate half a revolution clockwise around the rotation axis of the first pinion 16, the first pinion 16 rotates 180° clockwise, and the indicator needle rotates with the fourth large gear 19 at the corresponding angle (such as rotating 90° according to the transmission ratio). At this time, the angle pointed to by the indicator needle is the angle value corresponding to the displacement segment.

[0031] Sliding block 10 moves up to the top (returns to the upper limit position): Sliding block 10 moves upwards and reciprocates from the bottom, and transmission rod 15 pushes the eccentric pin to continue rotating clockwise half a revolution around the rotation axis of the first pinion 16. The first pinion 16 then rotates 180° (cumulative rotation of 360°). The indicator needle continues to rotate with the transmission system, and the cumulative angle increases, realizing the recording of the angular displacement from the lower limit to the upper limit.

[0032] Transition during continuous reciprocating motion: Each time the sliding block 10 completes one up-and-down reciprocating motion (up→down→up), the first pinion 16 rotates 360° clockwise continuously, and the indicator needle continuously accumulates the rotation angle according to the gear transmission ratio. For example, if the transmission ratio is 1:4, when the first pinion 16 rotates 360°, the indicator needle rotates 90°, corresponding to a 90° angular displacement of the external rotating component.

[0033] In the above process, the reciprocating linear motion of the sliding block 10 is transformed into the unidirectional continuous circular motion of the first pinion 16 through the eccentric hinge structure of the transmission rod 15, thus solving the problem of adapting reciprocating motion to continuous rotation. Multi-stage gear transmission transmits the rotation of the first pinion 16 to the angle indicator 20 in a fixed proportion, directly linking the rotation angle of the indicator to the angular displacement of the external rotating component. By reading the cumulative angle rotated by the indicator, the angular displacement of the external rotating component can be accurately displayed, achieving full-range, continuous angle measurement, which is particularly suitable for scenarios requiring the recording of cumulative angles from continuous rotation or reciprocating oscillation.

[0034] The working principle of this device is as follows: the external rotating component drives the rotating spindle 2 to rotate, causing the magnetic ring assembly 3 fitted on it to rotate synchronously. The alternating N and S poles on the end face of the main magnetic ring 6 cause the magnetic field on the outer circumference to change periodically. The oscillating contact piece 12, made of magnetically conductive material, senses the change in magnetic field and deflects, causing the sliding block 10 to slide in the vertical slot 9. The sliding block 10 is eccentrically hinged through the transmission rod 15, converting the linear motion into the rotation of the first pinion 16. The first pinion 16 meshes with the second large gear 17, and its coaxial third pinion 18 meshes with the fourth large gear 19, ultimately driving the angle indicator needle 20 to rotate. When the oscillating contact piece 12 deflects, the torsion spring 14 stores force, and resets after the change in magnetic field disappears, ensuring continuous sensing. The gear transmission transmits the motion and outputs the angle reading, realizing accurate measurement of the angular displacement of the external rotating component.

[0035] The working principle of this device has been explained through the above embodiments. These embodiments only illustrate several implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A Hall effect magnetoelectric angular displacement sensor, characterized in that: It includes a fixed housing (1), a rotating spindle (2), a magnetic ring assembly (3), an elastic contact assembly (4), and an angle transmission mechanism (5); the rotating spindle (2) is rotatably disposed at the center of the fixed housing (1), and one end of it extends out of the fixed housing (1) and is connected to an external rotating component; the magnetic ring assembly (3) is sleeved on the rotating spindle (2) and rotates synchronously with it; the elastic contact assembly (4) is fixed on the inner wall of the fixed housing (1) and cooperates with the magnetic ring assembly (3); the angle transmission mechanism (5) connects to the elastic contact assembly and outputs an angle reading.

2. A Hall effect magnetoelectric angle displacement sensor according to claim 1, characterized in that: The magnetic ring assembly (3) includes a main magnetic ring (6), on the end face of which a plurality of N poles and S poles are alternately arranged at intervals.

3. A Hall effect magnetoelectric angle displacement sensor according to claim 1, characterized in that: The elastic contact assembly (4) can sense the change in magnetic field on the outer circumference of the main magnetic ring (6) and deflect it. It includes a fixed rod (7), a support rod (8) is provided on the fixed rod (7), a vertical slot (9) is provided on the support rod (8), a sliding block (10) is provided in the vertical slot (9), a rotatable hinge rod (11) is provided on the sliding block (10), a swing contact piece (12) is provided on the hinge rod (11), a swing shaft (13) is provided at the bottom of the swing contact piece (12), a torsion spring (14) is fitted on the swing shaft (13), and the torsion spring (14) is located between the support rod (8) and the swing contact piece (12).

4. A Hall effect magnetoelectric angle displacement sensor according to claim 3, characterized in that: The oscillating contact (12) is made of magnetic material.

5. A Hall effect magnetoelectric angle displacement sensor according to claim 3, characterized in that: The angle transmission mechanism (5) includes a transmission rod (15), which is hinged to a sliding block (10). A first pinion (16) is provided on the support rod (8). The transmission rod (15) is eccentrically hinged to the end face of the first pinion (16). A second large gear (17) meshing with the first pinion (16) is provided inside the fixed housing (1). A third pinion (18) is coaxially provided on the end face of the second large gear (17). A fourth large gear (19) meshing with the third pinion (18) is provided inside the fixed housing (1). An angle indicator needle (20) located outside the fixed housing (1) is coaxially provided on the fourth large gear (19).

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