A hall gear rotational speed sensor structure

Abstract

The utility model provides a kind of hall gear rotation speed sensor structure, it is related to gear rotation speed sensor field, including framework, the left side of the framework front is provided with magnet steel, the back of the framework is sequentially provided with hall element and circuit board, the right side of the framework is provided with sheath line, the surface of the framework is inserted with sensor shell;Sensor in the utility model adopts integrated design, reduces the number of components, simplifies assembly process, framework as core component, integrates magnet steel, hall element, circuit board and other key components, realize quick assembly by plug-in or welding mode, greatly reduce production difficulty and cost, sensor shell and framework between using clamping mode connection, without complex tool and operation, can realize quick installation, not only improve installation efficiency, and sensor is installed, due to the rationality of structural design, usually debugging and calibration also can be realized by simple operation, greatly save time and cost.

Description

Technical Field

[0001] This utility model belongs to the field of gear speed sensors, specifically a Hall gear speed sensor structure. Background Technology

[0002] Hall effect gear speed sensors are sensors that operate based on the Hall effect principle. They are widely used in automotive camshaft and crankshaft speed and position detection, automotive and industrial speedometers, AC motor encoders, chain conveyor speed and distance detection, treadmills, etc. They detect changes in the gap between the teeth of a gear and convert this mechanical motion into an electrical signal output, thus achieving accurate measurement of rotational speed. The working principle of a Hall effect gear speed sensor is based on the Hall effect. When current passes through a conductor or semiconductor placed in a magnetic field, if the direction of the magnetic field is perpendicular to the direction of the current, a potential difference, i.e., the Hall voltage, will be generated in the direction perpendicular to both the current and the magnetic field. In a Hall effect gear speed sensor, there is usually a fixed permanent magnet that generates a magnetic field. The rotating gear changes the distribution of magnetic flux in the magnetic field. When the gear teeth pass the sensor, they move closer to the sensor, causing the magnetic field to strengthen; when the tooth grooves pass, they move away from the sensor, causing the magnetic field to weaken. This periodic change in magnetic field strength is detected by the Hall element and converted into a corresponding electrical signal output.

[0003] The existing gear speed sensor requires the Hall element to be correctly aligned with the solder points on the circuit board during production and installation. Then, the magnet is installed in the designated position on the housing, usually using glue to fix the magnet to the housing. Then, the circuit board with the Hall element and magnet installed, along with other components such as the signal processing circuit board, are placed into the housing. During this process, attention must be paid to the position and orientation of each component to ensure that they are installed correctly inside the housing and do not collide or interfere with each other. Finally, the various parts of the housing are tightly connected together using fixing screws. This installation method is relatively cumbersome and also causes inconvenience for the debugging and calibration of the sensor after installation, thus limiting production efficiency.

[0004] In summary, this utility model provides a Hall gear speed sensor structure to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A Hall effect gear speed sensor structure includes a frame, a magnet is disposed on the left side of the front of the frame, a Hall element and a circuit board are disposed sequentially on the back of the frame, a sheath wire is disposed on the right side of the frame, and a sensor housing is inserted into the surface of the frame.

[0007] Furthermore, in this utility model, a placement groove is provided on the left side of the front of the skeleton, and the magnet is installed in the inner cavity of the placement groove.

[0008] Furthermore, in this utility model, the back of the frame is provided with a mounting groove and a slot in sequence, and the Hall element and the circuit board are respectively installed in the inner cavity of the mounting groove and the slot.

[0009] Furthermore, in this utility model, a mounting hole is provided on the right side of the skeleton, and the sheath line extends into the inner cavity of the mounting hole.

[0010] Furthermore, in this utility model, a fixing slot is provided on the left side of the front of the frame, and a slot protrusion is fixedly connected to the inner cavity of the sensor housing, and the slot protrusion engages with the fixing slot.

[0011] Furthermore, in this invention, the Hall element is soldered to the circuit board, and the sheath wire passes through the mounting hole and is soldered to the circuit board.

[0012] Beneficial effects: This utility model has the following beneficial effects:

[0013] The sensor in this invention adopts an integrated design, reducing the number of parts and simplifying the assembly process. The frame, as the core component, integrates key components such as magnets, Hall elements, and circuit boards. It can be quickly assembled by plugging or welding, which greatly reduces the production difficulty and cost. The sensor housing and the frame are connected by a snap-fit ​​method, which can achieve quick installation without complicated tools and operations. This not only improves installation efficiency, but also, due to the rational design of the structure, the sensor can usually be debugged and calibrated through simple operations after installation, which greatly saves time and costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the skeleton, sheath wire, and sensor housing of this utility model;

[0016] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the back structure of the skeleton of this utility model;

[0018] Figure 5 This is a schematic diagram of the slot protrusion structure of this utility model.

[0019] In the picture:

[0020] 1. Frame; 2. Magnet; 3. Hall element; 4. Circuit board; 5. Sheathed wire; 6. Sensor housing; 7. Placement slot; 8. Mounting slot; 9. Slot; 10. Mounting hole; 11. Fixing slot; 12. Slot protrusion. Detailed Implementation

[0021] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0022] Example 1

[0023] like Figure 1-5 As shown, this is the first embodiment of the present invention. This embodiment provides a Hall gear speed sensor structure, including a frame 1, a magnet 2 is provided on the left side of the front of the frame 1, a Hall element 3 and a circuit board 4 are arranged sequentially on the back of the frame 1, a sheath wire 5 is provided on the right side of the frame 1, and a sensor housing 6 is inserted into the surface of the frame 1.

[0024] Hall element 3 is soldered to circuit board 4, and sheath wire 5 passes through mounting hole 10 and is soldered to circuit board 4.

[0025] like Figure 1-5 As shown, the frame 1 provides a stable support for all components of the sensor. The integrated design reduces assembly steps and improves production efficiency. The magnet 2, as the magnetic field source in the sensor, interacts with the gear to generate magnetic field changes, which are then detected by the Hall element 3 to achieve speed measurement. The Hall element 3 is used to detect the magnetic field changes generated by the magnet and convert them into electrical signals for output. It is a key component for speed measurement. The circuit board 4 is used to process the electrical signals output by the Hall element 3, performing amplification, filtering, and other processing to finally output a stable speed signal. The sheathed cable 5 is used to transmit the signal processed by the circuit board 4 to external devices, while protecting the signal line from external interference and damage. The sensor housing 6 is used to enclose the frame 1, magnet 2, Hall element 3, and other components, preventing the intrusion of external factors such as dust and moisture. After the sensor housing 6 is inserted into the frame 1, it is potted and fixed with epoxy resin potting compound, which can effectively prevent the influence of moisture, dust, vibration, etc. on the sensor performance.

[0026] Example 2

[0027] Reference Figure 3-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0028] In this embodiment, a placement groove 7 is provided on the left side of the front of the frame 1, and the magnet 2 is installed in the inner cavity of the placement groove 7.

[0029] The back of the frame 1 is provided with a mounting groove 8 and a card slot 9, and the Hall element 3 and the circuit board 4 are respectively installed in the inner cavity of the mounting groove 8 and the card slot 9.

[0030] A mounting hole 10 is provided on the right side of the frame 1, and the sheath line 5 extends into the inner cavity of the mounting hole 10.

[0031] A fixing slot 11 is provided on the left side of the front of the frame 1, and a slot protrusion 12 is fixedly connected to the inner cavity of the sensor housing 6, and the slot protrusion 12 is engaged with the fixing slot 11.

[0032] like Figure 3-5 As shown, the placement groove 7 is used to fix the magnet 2, ensuring that the position of the magnet 2 on the frame 1 is stable and accurate, preventing the magnet 2 from shifting during vibration or use, and improving measurement accuracy. The mounting groove 8 and the slot 9 are used to fix the Hall element 3 and the circuit board 4 respectively, ensuring that their positions on the frame 1 are stable and accurate, preventing them from shifting or loosening during use. The design of the mounting groove 8 and the slot 9 makes the internal structure of the sensor more compact and saves space. The mounting hole 10 is used to fix the sheath wire 5 and guide the sheath wire 5 through the frame 1 to connect with the circuit board 4, while preventing the sheath wire 5 from shaking or falling off. The fixing slot 11 and the slot protrusion 12 are used to realize the snap-fit ​​connection between the sensor housing 6 and the frame 1, ensuring the stability and convenience of the installation, making the connection between the sensor housing 6 and the frame 1 tight and stable. At the same time, the snap-fit ​​design makes the installation and disassembly of the sensor housing 6 quick and easy, without complicated tools. The fixing slot 11 and the slot protrusion 12 also play a guiding role to prevent reverse installation.

[0033] In use, first place the magnet 2 in the placement slot 7 above the frame 1, then place the Hall element 3 and the circuit board 4 in the mounting slot 8 and the card slot 9 respectively to fix them, and pass the sheath wire 5 through the mounting hole 10. Then, solder the Hall element 3 to the circuit board 4, and solder the sheath wire 5 through the mounting hole 10 to the circuit board 4. After all the components are installed in place and assembled into a whole, insert the sensor housing 6 and fix it with epoxy resin potting compound to prevent moisture, dust, vibration and other factors from affecting the sensor performance. The card slot protrusion 12 inside the sensor housing 6 guides the installation with the fixing card slot 11 to prevent reverse installation.

[0034] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A Hall gear speed sensor structure, comprising a frame (1), characterized in that: A magnet (2) is provided on the left side of the front of the frame (1), a Hall element (3) and a circuit board (4) are provided on the back of the frame (1) in sequence, a sheath wire (5) is provided on the right side of the frame (1), and a sensor housing (6) is inserted into the surface of the frame (1).

2. The Hall gear speed sensor structure as described in claim 1, characterized in that: The frame (1) has a placement groove (7) on the left side of the front, and the magnet (2) is installed in the inner cavity of the placement groove (7).

3. The Hall gear speed sensor structure as described in claim 1, characterized in that: The back of the frame (1) is provided with a mounting groove (8) and a card slot (9) in sequence, and the Hall element (3) and the circuit board (4) are respectively installed in the inner cavity of the mounting groove (8) and the card slot (9).

4. The Hall gear speed sensor structure as described in claim 1, characterized in that: The frame (1) has a mounting hole (10) on its right side, and the sheath line (5) extends into the inner cavity of the mounting hole (10).

5. The Hall gear speed sensor structure as described in claim 1, characterized in that: A fixing slot (11) is provided on the left side of the front of the frame (1), and a slot protrusion (12) is fixedly connected to the inner cavity of the sensor housing (6), and the slot protrusion (12) is engaged with the fixing slot (11).

6. The Hall gear speed sensor structure as described in claim 1, characterized in that: The Hall element (3) is welded to the circuit board (4), and the sheath wire (5) passes through the mounting hole (10) and is welded to the circuit board (4).

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