Angle sensor and mounting structure thereof

Abstract

The utility model discloses an angle sensor and a mounting structure thereof, the angle sensor comprises an upper shell and a magnet seat which are arranged independently, a Hall chip is mounted on the upper shell, two magnets which can adapt to the Hall chip are mounted on the magnet seat, and two magnet grooves are arranged symmetrically. The upper shell is completely separated from the magnet seat, namely the upper shell and the magnet seat are in non-contact measurement; the installation error-tolerant rate is high, and certain precision can be guaranteed within a certain axial and radial installation error range. The axial mounting distance of the sensor and the magnet seat has very small influence on the precision, remote detection can be realized, and the error is ensured not to be greater than 0.3 degree within 10mm.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and in particular to an angle sensor and a mounting structure thereof. Background Art

[0002] According to their principles, angle sensors are mainly divided into photoelectric effect, Hall effect, mechanical potential change or acceleration / angular velocity measurement to achieve angle measurement. Currently, Hall type and potentiometric types are more widely used. This sensor is designed based on the Hall effect. From a mechanical structure point of view, angle sensors are divided into contact and non-contact types. Contact sensors, such as potentiometers and rotary transformers, rely on physical contact to measure angles. They are low-cost but prone to wear, and wear leads to a decrease in accuracy. Non-contact sensors, such as photoelectric encoders and Hall sensors, use the principles of photoelectric or Hall effect, with high accuracy and long life. In the prior art, the so-called non-contact structure does not completely separate the sensor and the magnet base. It is just that the internal magnet shaft is non-contact with the sensing element, and the outside is still wrapped by the structure, that is, the sensor will still be in contact with the original part being measured. It is not completely non-contact, but only avoids wear of the sensing element. For example, Chinese patent 201821558115.2 discloses a Hall angle sensor, comprising: a shell, a rotating shaft and a Hall chip, wherein the rotating shaft is supported by a bearing and passes through one side of the shell, and the end of the rotating shaft located outside the shell can be driven to rotate by an external force, and the end of the rotating shaft located inside the shell is provided with a magnet mounting frame, and the magnet mounting frame is provided with a magnet, and the Hall chip is fixed in the shell and arranged opposite to the magnet, the axial direction of the rotating shaft is perpendicular to the surface of the magnet, the surface of the magnet is parallel to the surface of the Hall chip, and the center of the magnet is aligned with the magnetic induction center Rd of the Hall chip.

[0003] Therefore, the current technology has the following problems when used in systems such as electro-hydraulic lifting: insufficient accuracy (mechanical wear, errors in transmission components), complex structure and high cost (existence of transmission components), high failure rate, and complex installation. Especially in the existing agricultural machinery installation and use environment, failures are more frequent, which to a certain extent restricts the development of systems such as electro-hydraulic lifting. Utility Model Content

[0004] The purpose of the utility model is to provide an angle sensor and its installation structure to solve the above problems. The angle sensor is completely separated from the magnet seat, has no mechanical contact, avoids mechanical wear, and greatly increases the service life.

[0005] To achieve the above-mentioned purpose, the utility model discloses an angle sensor, which includes an upper shell and a magnet base that are independently arranged. A Hall chip is installed on the upper shell, and two magnets that can adapt to the Hall chip are installed on the magnet base. The two magnets are symmetrically arranged.

[0006] This structure employs a parallel configuration of the magnets and Hall effect chip, providing the sensor with a more balanced and stable magnetic field environment. Specifically, the two magnets are symmetrically arranged with opposite polarity, forming a closed magnetic circuit within the sensing area. This results in minimal curvature and high parallelism of the magnetic field lines within this area, thus ensuring sensor accuracy within a certain range.

[0007] This technical solution is suitable for applications in complex or demanding environments, such as agricultural machinery and other industrial fields. By eliminating the mechanical friction common in traditional contact designs, the fully separated angle sensor can provide a longer service life and higher operational safety. For application scenarios that require long-term stable operation, it is undoubtedly a more ideal choice. This application uses the application of this technical solution in an electro-hydraulic lifting system as an example to illustrate, and does not limit the scope of application of this technical solution.

[0008] During operation, a bracket is mounted on the frame, the upper housing is mounted on the bracket, and the magnet base is mounted on the rotating shaft of the lift arm. Utilizing the Hall effect principle, the sensor itself is physically isolated from the magnet base. This structural design not only effectively avoids wear caused by direct contact, thereby reducing the accuracy degradation and potential failure risks caused by wear, but also greatly simplifies the installation process and improves the system's fault tolerance. The main advantages are significantly enhanced stability and reliability during measurement, reduced dependence on precise mounting position, reduced maintenance costs, and ultimately improved overall operational efficiency.

[0009] Preferably, a PCB is also mounted on the upper shell, the Hall chip is electrically connected to the PCB, and the PCB is electrically connected with pins.

[0010] This structure is convenient for the installation of PCB and Hall chip and is easy to use.

[0011] Preferably, the upper shell is open on one side away from the magnet seat, an upper cover is installed on the open side of the upper shell, a plug is connected to the front side of the upper shell, the Hall chip and PCB are located in the upper shell, and the end of the pin is located in the plug.

[0012] This structure is convenient for installing the pin and is easy to use.

[0013] Preferably, a magnet groove is provided on the side of the magnet seat, and the magnet is located in the magnet groove.

[0014] When installing the magnet, insert the magnet into the magnet slot. An interference fit is adopted between the magnet and the side wall of the magnet slot, which facilitates the installation of the magnet and is easy to use.

[0015] Preferably, a glue groove is provided on the inner side wall of the magnet groove.

[0016] When installing the magnet, the glue groove is used to pour epoxy resin glue, which fixes the magnet more firmly and prevents the magnet from falling off, making it easier to install the magnet and use it.

[0017] Preferably, the upper shell has a plurality of positioning claws on one side close to the magnet seat, and the plurality of positioning claws are circumferentially distributed along the central axis of the upper shell. A corresponding annular positioning groove is opened on the side close to the upper shell.

[0018] When installing the upper shell and the magnet seat, the positioning claws are aligned with the positioning grooves to ensure the installation accuracy of the upper shell and the magnet seat and improve the detection accuracy.

[0019] Preferably, the magnet seat has a magnetic pole mark.

[0020] When installing the magnet, it is convenient to identify the installation direction of the magnet.

[0021] Preferably, an upper ear plate is connected to the upper shell, an upper mounting hole is provided on the upper ear plate, a lower ear plate is connected to the magnet seat, a lower mounting hole is provided on the lower ear plate, an avoidance groove corresponding to the lower mounting hole is provided on the magnet seat, and a middle mounting hole is provided at the central axis of the magnet seat.

[0022] When installing the upper housing and the magnet seat, use bolts to pass through the upper mounting hole, lower mounting hole and middle mounting hole respectively, which is easy to operate.

[0023] An installation structure of the angle sensor as described above includes a frame with a rotating shaft rotatably connected to the frame. The structure is characterized in that a bracket is installed on the frame, an upper shell is installed on the bracket, and a magnet seat is installed on the rotating shaft.

[0024] Utilizing the Hall effect principle, the sensor itself is physically isolated from the magnet base. This structural design not only effectively avoids wear and tear caused by direct contact, thereby reducing the risk of wear-related accuracy degradation and potential failures, but also greatly simplifies the installation process and improves the system's fault tolerance. The main advantages are significantly enhanced measurement stability and reliability, reduced dependence on precise installation position, reduced maintenance costs, and ultimately improved overall operational efficiency.

[0025] Preferably, a protective cover is also installed on the frame.

[0026] The protective cover is used to protect the upper shell and the magnet seat.

[0027] In summary, the beneficial effects of this utility model include: the upper housing and magnet base are completely separated, i.e., contactless measurement; high installation tolerance, and guaranteed accuracy within certain axial and radial installation error ranges. The axial installation distance between the sensor and the magnet base has minimal impact on accuracy, enabling remote detection, with an error guaranteed to be no greater than 0.3° within 10 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the front view of a three-dimensional structure of an angle sensor of the present invention;

[0029] Figure 2 This is a rear-view stereoscopic structural diagram of an angle sensor of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of an angle sensor of the present utility model;

[0031] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper shell of an angle sensor of the present utility model;

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the lower shell of an angle sensor of the present invention;

[0033] Figure 6 This is a three-dimensional structural diagram of an angle sensor installation structure of the utility model;

[0034] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of part A in the figure.

[0035] In the figure: 1. Upper shell; 2. Upper cover; 3. Upper ear plate; 4. Upper mounting hole; 5. Plug; 6. Magnet seat; 7. Magnet slot; 8. Magnet; 9. Lower ear plate; 10. Lower mounting hole; 11. PCB; 12. Hall chip; 13. Pin; 14. Positioning claw; 15. Positioning slot; 16. Magnetic pole mark; 17. Middle mounting hole; 18. Avoidance slot; 19. Frame; 20. Lifting arm; 21. Rotating shaft; 22. Bracket; 23. Protective cover; 24. Glue slot; 25. Upper insert; 26. Lower insert. DETAILED DESCRIPTION

[0036] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 therefore cannot be understood as a limitation on this application.

[0038] 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 number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0041] Example 1, as Figures 1 to 5 As shown, an angle sensor includes an upper shell 1 and a magnet base 6 that are independently arranged. A Hall chip 12 is installed on the upper shell 1, and a magnet 8 that can adapt to the Hall chip 12 is installed on the magnet base 6. The upper shell 1 has a plurality of positioning claws 14 on the side close to the magnet base 6. The plurality of positioning claws 14 are distributed circumferentially along the central axis of the upper shell 1, and the magnet base 6 has a corresponding positioning groove 15 in the shape of a ring on the side close to the upper shell 1. Specifically, the number of positioning claws 14 is four, and the four positioning claws 14 are evenly distributed circumferentially along the central axis of the upper shell 1. When installing the upper shell 1 and the magnet base 6, the positioning claws 14 are aligned with the positioning groove 15 to ensure the installation accuracy of the upper shell 1 and the magnet base 6 and improve the detection accuracy.

[0042] This technical solution is suitable for applications in complex or demanding environments, such as agricultural machinery and other industrial fields. By eliminating the mechanical friction common in traditional contact designs, the fully separated angle sensor can provide a longer service life and higher operational safety. For application scenarios that require long-term stable operation, it is undoubtedly a more ideal choice. This application uses the application of this technical solution in an electro-hydraulic lifting system as an example to illustrate, and does not limit the scope of application of this technical solution.

[0043] During operation, a bracket 22 is mounted on the frame 19, the upper housing 1 is mounted on the bracket 22, and the magnet base 6 is mounted on the rotating shaft 21 of the lifting arm 20. Utilizing the Hall effect principle, the sensor itself is physically isolated from the magnet base. This structural design not only effectively avoids wear caused by direct contact, thereby reducing the accuracy degradation and potential failure risks caused by wear, but also greatly simplifies the installation process and improves the system's fault tolerance. The main advantages are significantly enhanced stability and reliability during the measurement process, reduced dependence on precise installation position, reduced maintenance costs, and ultimately improved overall operational efficiency.

[0044] The advantages of this solution are: the upper housing 1 and magnet holder 6 are completely separated, meaning there is no contact between them. It also offers a high tolerance for installation errors, ensuring accuracy within certain axial and radial installation tolerances. The axial installation distance between the upper housing 1 and magnet holder 6 has minimal impact on accuracy, enabling remote measurement, with an error guaranteed to be no greater than 0.3° within a 10mm range.

[0045] Specifically, the upper housing 1 also houses a PCB 11, to which the Hall chip 12 is electrically connected, and to which the PCB 11 is electrically connected a pin 13. This structure facilitates the installation of the PCB 11 and the Hall chip 12, making it easy to use. The upper housing 1 is open on the side facing away from the magnet holder 6. The upper cover 2 is mounted on this open side of the upper housing 1. The front of the upper housing 1 is connected to the plug 5. The Hall chip 12 and PCB 11 are located within the upper housing 1, and the end of the pin 13 is located within the plug 5. This structure facilitates the installation of the pin 13 and makes it easy to use.

[0046] Specifically, a magnet slot 7 is provided on the side of the magnet base 6, and the magnet 8 is located in the magnet slot 7. When installing the magnet 8, the magnet 8 is inserted into the magnet slot 7, and an interference fit is adopted between the magnet 8 and the side wall of the magnet slot 7, which facilitates the installation of the magnet 8 and is easy to use. A glue slot 24 is provided on the inner side wall of the magnet slot 7. When installing the magnet 8, the glue slot 24 is used to pour epoxy resin glue, which fixes the magnet 8 more firmly and prevents the magnet 8 from detaching, facilitating the installation of the magnet 8 and making it easy to use. There are two magnet slots 7, and the two magnet slots 7 are arranged symmetrically with each other. This structure adopts a configuration in which the magnets are parallel to the Hall chip, providing a more balanced and stable magnetic field environment for the sensor. Specifically, the two magnets 8 are arranged symmetrically and with opposite polarities, forming a closed magnetic circuit within the sensing area, so that the magnetic lines of force in this area have a smaller curvature and a higher degree of parallelism, thereby ensuring the sensor accuracy within a certain range. The magnet base 6 has a magnetic pole mark 16. When installing the magnet 8, it is convenient to identify the installation direction of the magnet 8.

[0047] Specifically, the upper housing 1 is connected to an upper lug plate 3, which has an upper mounting hole 4. The magnet base 6 is connected to a lower lug plate 9, which has a lower mounting hole 10. The magnet base 6 also has an escape groove 18 corresponding to the lower mounting hole 10. A middle mounting hole 17 is defined along the central axis of the magnet base 6. Specifically, an upper insert 25 is connected to the upper mounting hole 4, and a lower insert 26 is connected to the lower mounting hole 10. To install the upper housing 1 and magnet base 6, bolts are inserted through the upper mounting hole 4, lower mounting hole 10, and middle mounting hole 17, respectively, making the installation simple.

[0048] Example 2, as Figures 6 to 7 As shown, a mounting structure for an angle sensor according to Example 1 includes a frame 19, a rotating shaft 21 being rotatably connected to the frame 19, a bracket 22 being mounted on the frame 19, an upper housing 1 being mounted on the bracket 22, and a magnet holder 6 being mounted on the rotating shaft 21. A shield 23 is also mounted on the frame 19. The shield 23 is used to protect the upper housing 1 and the magnet holder 6.

[0049] Utilizing the Hall effect principle, the sensor itself is physically isolated from the magnet base. This structural design not only effectively avoids wear and tear caused by direct contact, thereby reducing the risk of wear-related accuracy degradation and potential failures, but also greatly simplifies the installation process and improves the system's fault tolerance. The main advantages are significantly enhanced measurement stability and reliability, reduced dependence on precise installation position, reduced maintenance costs, and ultimately improved overall operational efficiency.

[0050] Compared to traditional angle sensors, which require connection to the measured component and are prone to wear and tear, affecting accuracy or causing failures in environments with low installation precision, as well as complex installation and low fault tolerance, fully separated angle sensors are completely separated from the measured object and maintain reliable accuracy even under certain axial and radial offsets and non-parallel installation conditions. This not only eliminates wear and tear that can affect accuracy and cause failures, but also improves installation convenience and fault tolerance. Designed for electro-hydraulic lifting systems in high-horsepower tractors, this fully separated angle sensor aligns with the trend toward agricultural mechanization and automation and holds broad market potential. This sensor accurately detects angle changes, ensuring system stability and reliability, and improving agricultural production efficiency. Furthermore, its superior performance extends beyond tractor applications and is also suitable for use in construction machinery such as excavators and loaders, enabling precise and reliable angle measurement and improving operational accuracy and safety. In summary, fully separated angle sensors have broad application prospects in both agriculture and construction machinery, playing a significant role in promoting the development of intelligent and automated operations in related industries.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An angle sensor, characterized in that: The device comprises an upper shell (1) and a magnet base (6) which are independently arranged. A Hall chip (12) is mounted on the upper shell (1). Two magnets (8) which are compatible with the Hall chip (12) are mounted on the magnet base (6). The two magnets (8) are symmetrically arranged with respect to each other.

2. The angle sensor according to claim 1, wherein: A PCB (11) is also mounted on the upper housing (1), the Hall chip (12) is electrically connected to the PCB (11), and the PCB (11) is electrically connected to a pin (13).

3. The angle sensor according to claim 2, wherein: The upper shell (1) is open on one side away from the magnet seat (6), and an upper cover (2) is installed on the open side of the upper shell (1). The front side of the upper shell (1) is connected to a plug (5), the Hall chip (12) and the PCB (11) are located in the upper shell (1), and the end of the pin (13) is located in the plug (5).

4. The angle sensor according to claim 1, wherein: A magnet slot (7) is provided on the side of the magnet seat (6), and the magnet (8) is located in the magnet slot (7).

5. The angle sensor according to claim 4, wherein: A glue groove (24) is provided on the inner side wall of the magnet groove (7).

6. The angle sensor according to claim 1, wherein: The magnet base (6) has a magnetic pole mark (16).

7. The angle sensor according to claim 1, wherein: A side of the upper shell (1) close to the magnet seat (6) has a plurality of positioning claws (14), and the plurality of positioning claws (14) are distributed circumferentially along the central axis of the upper shell (1). A corresponding positioning groove (15) in the shape of an annulus is opened on the side of the magnet seat (6) close to the upper shell (1).

8. The angle sensor according to any one of claims 1 to 7, characterized in that The upper shell (1) is connected to an upper ear plate (3), the upper ear plate (3) is provided with an upper mounting hole (4), the magnet base (6) is connected to a lower ear plate (9), the lower ear plate (9) is provided with a lower mounting hole (10), the magnet base (6) is further provided with an avoidance groove (18) corresponding to the lower mounting hole (10), and a middle mounting hole (17) is provided at the center axis of the magnet base (6).

9. A mounting structure for an angle sensor as claimed in claim 1, comprising a frame (19), a rotating shaft (21) being rotatably connected to the frame (19), characterized in that: A bracket (22) is mounted on the frame (19), the upper shell (1) is mounted on the bracket (22), and the magnet seat (6) is mounted on the rotating shaft (21).

10. A mounting structure for an angle sensor as claimed in claim 9, characterized in that: A guard (23) is also installed on the frame (19).

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