Magnetic sensor structure

Abstract

The utility model provides a magnetic sensor structure, which relates to the field of sensors, and comprises a magnetic sensitive element, a packaging shell is sleeved outside the magnetic sensitive element, and the bottom of the packaging shell is connected with a base; the connecting piece is arranged below the base, and a rotating piece is arranged at the top end of the connecting piece; mounting grooves are formed in the packaging shell and the base, and guide structures are arranged on the inner walls of the mounting grooves; and the guide block is arranged on the rotating piece. The rotating part is inserted into the mounting groove along the guide structure and then rotates to realize connection, operation in a narrow space by tools such as a wrench is not needed, the mounting process is simplified, and when the position of the sensor needs to be adjusted on an industrial automatic production line, the structure can be easily disassembled only by reversely rotating the rotating part and then repositioned and mounted; and compared with an existing complex multi-component disassembly and assembly structure, the adjustment convenience is greatly improved, and the flexibility and efficiency of a production line are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sensor especially relates to a magnetic sensor structure. BACKGROUND

[0002] Magnetic sensor can detect magnetic field accurately and convert into electric signal, and is widely applied in many fields such as automobile, industrial automation, consumer electronics etc. Automobile engine ignition, electronic stability control, precision machinery operation monitoring in industry, intelligent logistics goods position detection, and smart phone compass in consumer electronics, wireless charging magnetic field detection etc. all rely on it. Its working principle is based on hall or magnetoresistance effect, when external magnetic field changes, magnetic sensitive element produces electric signal change, and accurate magnetic field detection is realized through circuit processing. However, there are many inconveniences in actual installation and use.

[0003] In automobile manufacturing and maintenance, part of sensors are fixed by bolts, and maintenance personnel need to operate with wrench in small and complex space, and the process is tedious. Industrial automation production line often needs to adjust sensor position to adapt to different processes, but the existing installation structure is complex, involves multi-component disassembly, consumes a lot of energy of professional personnel, and affects the flexibility and efficiency of production line. Therefore, a kind of magnetic sensor structure is proposed. CONTENT OF UTILITY MODEL

[0004] The utility model aims at the deficiency in the prior art, and realizes connection by rotating rotating part after inserting installation slot along guide structure, does not need to operate in small space with the aid of wrench and other tools, simplifies installation process, when industrial automation production line needs to adjust sensor position, the structure only needs to reversely rotate rotating part to be easily disassembled, and then repositioned and installed, compared with the existing complex multi-component disassembly structure, the convenience of adjustment is greatly improved, and the flexibility and efficiency of production line are improved.

[0005] In order to solve the above technical problems, the utility model solves the problem of insufficient installation convenience of existing magnetic sensor through the following technical scheme.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of magnetic sensor structure, comprising:

[0008] Magnetic sensitive element, its outside is equipped with encapsulation shell, the bottom of the encapsulation shell is connected with base;

[0009] Connecting piece is arranged below the base, and the top end of the connecting piece is provided with rotating part;

[0010] The encapsulation shell and base are provided with installation slot, and the inner wall of the installation slot is provided with guide structure;

[0011] A guide block is arranged on the rotating member, and the guide block is inserted into the installation slot along the guide structure and then rotated to form a threaded connection between the rotating member and the installation slot.

[0012] Preferably, the guide structure comprises a guide slot and a limiting rotation slot, the guide slot extends longitudinally and communicates with the limiting rotation slot to guide the insertion and rotational positioning of the rotating member.

[0013] Preferably, the upper end of the rotating member is provided with external threads, and the inner wall of the installation slot is provided with internal threads matched with the external threads to achieve threaded fastening.

[0014] Preferably, the inner wall of the base is provided with an inner chamfer, and the rotating member of the connecting member is provided with an outer chamfer between the connecting member, and the contact surface of the inner chamfer and the outer chamfer has an inclined slope to increase the contact area and improve the connection stability.

[0015] Preferably, the inner periphery of the inner chamfer is provided with an annular stabilizing layer, and the annular stabilizing layer is in close contact with the outer wall of the outer chamfer for stress dispersion and prevention of loosening.

[0016] Preferably, the inner wall of the inner chamfer is provided with a plurality of insertion interfaces, and the outer wall of the annular stabilizing layer is provided with elastic clamping balls, and the elastic clamping balls are in interference fit with the insertion interfaces to enhance the axial fixing force.

[0017] Preferably, the elastic clamping balls are made of silicone rubber or polyurethane, and the diameter of the elastic clamping balls is greater than the hole diameter of the insertion interfaces to form compression deformation to realize interference fit.

[0018] Preferably, the elastic clamping balls and the insertion interfaces are uniformly distributed in at least four groups in the circumferential direction to ensure uniform stress.

[0019] Preferably, the surface of the annular stabilizing layer is provided with inclined notches to facilitate assembly of the annular stabilizing layer.

[0020] Preferably, the guide structure is provided with two groups of guide slots and limiting rotation slots along the inner wall of the installation slot, each group comprising one guide slot and one limiting rotation slot to balance the rotational torque and prevent deflection.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The magnetic sensor structure provided by the application realizes connection by rotating the rotating member along the guide structure after being inserted into the installation slot, without the need for tools such as wrenches for operation in a small space, thereby simplifying the installation process. When the position of the sensor needs to be adjusted on an industrial automatic production line, the structure only needs to be reversely rotated to easily disassemble the rotating member, and then the rotating member is repositioned and installed. Compared with the existing complex multi-component disassembly and assembly structure, the convenience of adjustment is greatly improved, and the flexibility and efficiency of the production line are improved.

[0023] The thread connection between the rotating part and the mounting groove, combined with the close fit of the chamfer of the base and the connecting part, increases the contact area. The design of the annular stabilizing layer and the elastic clamping ball disperses stress and enhances axial fixation force, prevents loosening, ensures stable operation of the sensor under complex working conditions, and reduces detection errors caused by unstable installation.

[0024] The oblique cut on the surface of the annular stabilizing layer facilitates assembly, and the interference fit design of the elastic clamping ball and the plug-in interface ensures fixation effect while facilitating installation of the annular stabilizing layer, improving the assembly efficiency of the overall structure.

[0025] The elastic clamping ball and the plug-in interface are uniformly distributed in at least four groups in the circumferential direction, and two groups of guide structures are arranged along the inner wall of the mounting groove in the circumferential direction, which can balance the rotational torque, prevent deflection, make the entire structure more uniform in stress during operation, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0028] Figure 2 It is a schematic diagram of the split structure of the present application;

[0029] Figure 3 It is a schematic diagram of the bottom view of the packaging shell and the base of the present application;

[0030] Figure 4 It is a schematic diagram of the structure of the present application eliminating hidden lines;

[0031] Figure 5 It is a schematic diagram of the right side view of the packaging shell and the base of the present application;

[0032] Figure 6 It is a schematic diagram of the stabilizing layer of the present application.

[0033] Figure number explanation: 1, magnetic sensitive element; 2, packaging shell; 201, mounting groove; 202, guide structure; 2021, guide groove; 2022, limiting rotation groove; 203, internal thread; 3, base; 301, internal chamfer; 3011, plug interface; 4, connecting piece; 401, rotating piece; 402, guide block; 403, external thread; 404, external chamfer; 5, annular stabilizing layer; 501, clamping ball; 502, notch. DETAILED DESCRIPTION

[0034] The utility model will be described in further detail below in combination with the drawings.

[0035] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the utility model defined in the following description can be used in other implementation schemes, modification schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0036] Those skilled in the art should understand that, in the disclosure of the utility model, the orientation or position indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the simplified description of the utility model for the convenience of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms cannot be understood as a limitation of the utility model.

[0037] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number. EMBODIMENT

[0038] Please refer to Figures 1-6 A magnetic sensor structure comprises:

[0039] The magnetic sensitive element is externally sleeved with a packaging shell, and the bottom of the packaging shell is connected with a base;

[0040] The connecting piece is arranged below the base, and the top end of the connecting piece is provided with a rotating piece;

[0041] The packaging shell and the base are provided with a mounting groove, and the inner wall of the mounting groove is provided with a guide structure;

[0042] The guide block is arranged on the rotating member, and the guide block is inserted into the installation slot along the guide structure and then rotated, so that the rotating member is connected with the installation slot in a threaded mode.

[0043] The magnetic sensor structure of the present application is mainly composed of a magnetic sensitive element, a packaging shell, an installation slot, a guide structure, a base, a connecting member, a rotating member and a guide block, and the following is a detailed structure and working principle.

[0044] I. Detailed structure of each component and connection mode

[0045] Component assembly: first, the magnetic sensitive element is placed in the packaging shell to complete the preliminary packaging. The packaging shell and the base are integrally formed, the installation slot is pre-formed in the inside thereof, the guide structure is arranged on the inner wall of the installation slot, including the longitudinally extending guide slot and the limiting rotation slot communicated with the guide slot, and the internal thread is machined on the upper end of the inner wall of the installation slot.

[0046] For the connecting member, the rotating member is installed at the top end thereof, the external thread matched with the internal thread of the rotating slot is arranged on the upper end of the rotating member, the guide blocks are installed on the outer wall of the rotating member, and the external chamfer is arranged between the rotating member and the connecting member.

[0047] The internal chamfer is machined on the inner wall of the base, the annular stabilizing layer is arranged on the inner periphery of the internal chamfer, the elastic clamping ball is installed on the outer wall of the annular stabilizing layer, the inclined cut is formed on the surface of the annular stabilizing layer, and the insertion port corresponding to the elastic clamping ball is formed on the inner wall of the internal chamfer.

[0048] Installation process: the assembled magnetic sensor (the whole composed of the magnetic sensitive element, the packaging shell and the base) is aligned with the installation slot from top to bottom, and the guide blocks on the outer wall of the rotating member are inserted into the guide slots. When the guide blocks touch the top of the guide structure and generate resistance, the rotating member is rotated. Since the guide slot and the limiting rotation slot are communicated with each other, the guide block is slowly rotated to the inside of the limiting rotation slot, at this time, the external thread on the rotating member is matched with the internal thread in the installation slot to realize the threaded connection, and the guide block is abutted against the inner wall of the limiting rotation slot to complete the preliminary fixation.

[0049] With the rotating of the rotating member, the bottom of the base is tightly pressed on the connecting member, the internal chamfer in the base is in close contact with the external chamfer between the rotating member and the connecting member, the annular stabilizing layer is in close contact with the outer wall of the external chamfer, and the elastic clamping ball on the annular stabilizing layer is in interference fit with the insertion port on the inner wall of the internal chamfer, so as to further enhance the axial fixation force.

[0050] II. Working principle

[0051] Magnetic detection principle: the magnetic sensitive element works based on the Hall or magnetoresistance effect, when the external magnetic field changes, the magnetic sensitive element will produce an electrical signal change, which can realize accurate detection of the magnetic field after subsequent circuit processing, and is applied to different scenes such as automobile engine ignition control, mechanical operation monitoring of industrial automation equipment, etc.

[0052] Connection and positioning: when installing the magnetic sensor, the guide block on the rotating part is inserted into the installation slot along the guide groove, which plays a guiding role to ensure that the rotating part can be accurately inserted. When the guide block is blocked at the top of the guide groove, rotate the rotating part, and the guide block will enter the limiting rotation groove, while the external thread on the rotating part and the internal thread in the installation slot are mutually engaged to realize threaded connection. Two groups of guide structures are arranged circumferentially along the inner wall of the installation slot, which can balance the rotating torque and prevent deflection during rotation, ensuring the accuracy and stability of the connection.

[0053] Stability and fastening: the inner chamfer in the base closely fits the outer chamfer on the connecting piece, and since the contact surface has an inclined slope, the contact area is increased and the stability of the connection is improved. The annular stabilizing layer is made of rubber and closely contacts the outer wall of the outer chamfer, which not only can further increase the friction force, but also can disperse stress and prevent loosening. The interference fit between the elastic clamping ball and the plug-in port enhances the axial fixing force, and at least four groups are evenly distributed to ensure uniform stress, so that the magnetic sensor can be stably installed under various complex working conditions such as vibration and impact, and the normal operation of the magnetic detection work is ensured.

[0054] It should be understood by those skilled in the art that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been demonstrated and explained in the embodiments, and the embodiments of the utility model can have any deformation or modification without departing from the principle.

Claims

1. A magnetic sensor structure, characterized by The application relates to a magnetic sensitive element (1) which is externally sleeved with a packaging shell (2), the bottom of the packaging shell (2) is connected with a base (3), a connecting piece (4) is arranged below the base (3), the top end of the connecting piece (4) is provided with a rotating piece (401), an installation groove (201) is arranged in the packaging shell (2) and the base (3), a guide structure (202) is arranged on the inner wall of the installation groove (201), a guide block (402) is arranged on the rotating piece (401), the guide block (402) is inserted into the installation groove (201) along the guide structure (202) and is rotated, so that the rotating piece (401) is in threaded connection with the installation groove (201). The guide structure (202) comprises a guide groove (2021) and a limiting rotating groove (2022), the guide groove (2021) extends in the longitudinal direction and is communicated with the limiting rotating groove (2022), so as to guide the insertion and rotating positioning of the rotating piece (401). The top end of the rotating piece (401) is provided with an external thread (403), the inner wall of the installation groove (201) is provided with an internal thread (203) matched with the external thread (403), so as to realize threaded fastening. The inner wall of the base (3) is provided with an inner chamfer (301), the rotating piece (401) of the connecting piece (4) is provided with an outer chamfer (404) between the connecting piece (4), the contact surface of the inner chamfer (301) and the outer chamfer (404) has an inclined slope, so as to increase the contact area and improve the connection stability. The inner periphery of the inner chamfer (301) is provided with an annular stabilizing layer (5), the annular stabilizing layer (5) is in close contact with the outer wall of the outer chamfer (404), and is used for dispersing stress and preventing loosening.

2. A magnetic sensor structure according to claim 1, characterized in that: The inner wall of the inner chamfer (301) is provided with a plurality of insertion interfaces (3011), the outer wall of the annular stabilizing layer (5) is provided with elastic clamping balls (501), the elastic clamping balls (501) are in interference fit with the insertion interfaces (3011), so as to enhance the axial fixing force.

3. A magnetic sensor structure according to claim 1, characterized in that: The elastic clamping balls (501) are made of silicone rubber or polyurethane, the diameter of the elastic clamping balls (501) is greater than the hole diameter of the insertion interfaces (3011), compression deformation is formed to realize interference fit.

4. A magnetic sensor structure according to claim 1, characterized in that: The elastic clamping balls (501) and the insertion interfaces (3011) are uniformly distributed in at least four groups in the circumferential direction, so as to ensure uniform stress.

5. A magnetic sensor structure according to claim 4, characterised in that: The surface of the annular stabilizing layer (5) is provided with an oblique cut (502), so as to facilitate assembly of the annular stabilizing layer (5).

6. A magnetic sensor structure according to claim 5, characterised in that: The guide structure (202) is arranged in two groups along the inner wall of the installation groove (201) in the circumferential direction, each group comprises one guide groove (2021) and one limiting rotating groove (2022), so as to balance the rotating torque and prevent deflection.

7. A magnetic sensor structure according to claim 6, characterised in that: ​ 8. A magnetic sensor structure according to claim 6, characterized in that: ​ 9. A magnetic sensor structure according to claim 5, characterized in that: ​ 10. A magnetic sensor structure according to claim 2, characterized in that: ​

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