Small angle sensor

Abstract

The utility model relates to a small angle sensor comprising a housing, two ends of the housing are provided with clamping holes, the clamping holes are internally provided with clamping sleeves, the housing is provided with a shaft hole between the clamping holes, and the shaft hole is internally provided with a rotating shaft assembly. Through the clamping holes formed in the two ends of the sensor shell and the clamping sleeve arranged in the sensor shell, the design not only simplifies the installation process, but also ensures the stability and reliability of the sensor in textile machinery, and the semi-cylindrical bulge at the bottom of the shell is matched with the semi-cylindrical groove in the circuit board, so that the reliability of the sensor is improved. The circuit board and the shell can be conveniently assembled and disassembled, the rotating shaft assembly arranged in the shaft hole can accurately respond to external angle changes and convert the external angle changes into measurable signals, and meanwhile, the angle positioning grooves formed in the two sides of the shaft hole of the shell further improve the measurement precision and the positioning accuracy of the sensor. And accurate control and stable operation of each part in the textile machinery are ensured.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a small-angle sensor. Background Technology

[0002] In the textile machinery industry, small-angle sensors are widely used to accurately measure and monitor angle changes in equipment to ensure the stability of the weaving process and product quality. Traditional small-angle sensor designs typically include a one-piece molded shaft assembly. While this design is relatively simple to manufacture, the one-piece shaft assembly is often limited by material selection and manufacturing processes, making it difficult to meet the high precision, high reliability, and durability requirements of textile machinery. Especially in applications requiring heavy loads or frequent rotation, the one-piece shaft assembly is prone to wear, deformation, and even breakage, affecting the sensor's measurement accuracy and lifespan. Furthermore, the one-piece shaft assembly presents inconvenience in maintenance and replacement. In case of failure, the entire sensor usually needs to be replaced, which not only increases maintenance costs but may also lead to extended equipment downtime. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a small-angle sensor that is high-precision, highly stable, and easy to assemble and disassemble.

[0004] To achieve the above objectives, this utility model employs a small-angle sensor comprising a housing, with snap-fit ​​holes at both ends of the housing, and snap-fit ​​sleeves disposed inside the snap-fit ​​holes. A shaft hole is formed between the snap-fit ​​holes in the housing, and a rotating shaft assembly is disposed inside the shaft hole. A circuit board is snapped onto the bottom of the housing, and a semi-cylindrical protrusion is provided at the bottom of the housing. A semi-cylindrical groove matching the semi-cylindrical protrusion is provided on the circuit board, and the circuit board is snapped onto the semi-cylindrical protrusion at the bottom of the housing via the semi-cylindrical groove.

[0005] The advantages of the above structure are as follows: the snap-fit ​​holes at both ends of the sensor housing and the snap-fit ​​sleeves inside not only simplify the installation process but also ensure the stability and reliability of the sensor in textile machinery, effectively preventing loosening or detachment due to vibration or external force. The semi-cylindrical protrusion at the bottom of the housing matches the semi-cylindrical groove on the circuit board, allowing the circuit board to be easily assembled and disassembled with the housing. The rotating shaft assembly inside the shaft hole can accurately respond to changes in external angle and convert them into measurable signals. At the same time, the angle positioning grooves on both sides of the shaft hole of the housing further improve the measurement accuracy and positioning accuracy of the sensor, ensuring the precise control and stable operation of various components in textile machinery.

[0006] This utility model is further configured as follows: a rotating shaft assembly includes a rotating shaft installed within a shaft hole in the housing. The top end of the rotating shaft extends outward from the shaft hole and protrudes from the housing. A first bearing is fitted onto the rotating shaft at one end of the shaft hole opening. A magnet is provided at the end of the rotating shaft. A magnet sleeve is fitted between the magnet and the rotating shaft. A second bearing, fitted onto the rotating shaft at the end of the magnet sleeve located near the first bearing, is positioned adjacent to the magnet sleeve and maintains a certain distance from the first bearing. The arrangement of the first and second bearings effectively supports the rotating shaft and reduces friction and wear during rotation, thereby improving the stability of the rotating shaft, extending its service life, and ensuring the reliability of the sensor during long-term operation. The magnet at the end of the rotating shaft and the magnet sleeve fitted between the magnet and the rotating shaft together constitute a magnetic induction system, enabling the sensor to more accurately detect changes in external angles and convert them into electrical signals for output. Simultaneously, the presence of the magnet sleeve also protects and secures the magnet, preventing it from falling off or being damaged during operation.

[0007] This invention further features a circuit board with chips positioned facing the magnet. These chips are distributed within the magnet's magnetic field range, with a gap between them and the magnet. By positioning the chips within the magnet's magnetic field range, changes in the magnetic field generated by the magnet can be detected more accurately. Maintaining a certain distance between the chips and the magnet avoids physical interference or damage caused by direct contact.

[0008] This utility model is further configured such that the housing has angular positioning grooves on both sides of the shaft hole. By providing angular positioning grooves on both sides of the shaft hole, a more accurate reference point can be provided for the rotating shaft assembly, which helps the sensor reduce errors and improve measurement accuracy when measuring angles.

[0009] This utility model is further configured such that the housing is made of insulating material. The use of insulating material effectively isolates the internal electronic components of the sensor from the external electrical environment, preventing electrical safety issues such as current leakage or short circuits.

[0010] This utility model is further configured such that the shaft is made of metal. Making the shaft of metal significantly improves its mechanical strength and wear resistance.

[0011] This utility model is further configured such that the snap-fit ​​sleeve is made of a conductive material. The conductive material of the snap-fit ​​sleeve ensures smooth current flow at the snap-fit ​​point, reducing resistance and energy loss. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0013] Figure 2This is an exploded view of the assembly of the shell and the internal structure of the shell according to an embodiment of the present invention.

[0014] Figure 3 This is an exploded view of the rotating shaft assembly according to an embodiment of the present invention.

[0015] Figure 4 This is an exploded view of the assembly of the housing and circuit board according to an embodiment of the present invention. Detailed Implementation

[0016] like Figures 1-4 As shown, an embodiment of this utility model provides a small angle sensor, including a housing 1 made of plastic material to ensure electrical insulation. Both ends of the housing 1 have snap-fit ​​holes 2, with copper snap-fit ​​sleeves 21 inside. A shaft hole 3 is formed between the two snap-fit ​​holes 21, and a rotating shaft assembly 4 is disposed inside the shaft hole 3. A circuit board 5 is snapped onto the bottom of the housing 1. A semi-cylindrical protrusion 11 is provided on the bottom of the housing 1. A semi-cylindrical groove 51 matching the semi-cylindrical protrusion 11 is provided on the circuit board 5. The circuit board 5 is snapped onto the semi-cylindrical protrusion 11 at the bottom of the housing 1 through the semi-cylindrical groove 51. Angle positioning grooves 12 are provided on both sides of the shaft hole 3 to improve the angle measurement accuracy of the sensor during rotation. The rotating shaft assembly 4 includes a mounting bracket... A steel rotating shaft 41 is installed in the shaft hole 3 of the housing 1. The top part of the rotating shaft 41 extends out of the shaft hole 3 and out of the housing 1 for easy connection with external mechanisms. A first bearing 42 is provided at one end of the shaft hole 3, which is sleeved on the rotating shaft 41 to ensure smooth rotation of the rotating shaft 41. A magnet 43 is provided at the end of the rotating shaft 41 to generate a magnetic field. A magnet sleeve 44 is sleeved between the magnet 43 and the rotating shaft 41. A second bearing 45 is provided at one end of the magnet sleeve 44, which is sleeved on the rotating shaft 41. The second bearing 45 is arranged close to the magnet sleeve 44 and maintains a certain distance from the first bearing 42 to reduce friction and wear. A chip 52 is arranged on the circuit board 5 facing the magnet 43. The chip 52 is distributed within the magnetic field range of the magnet 43, and there is a gap between the chip 52 and the magnet 43.

[0017] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A small-angle sensor, characterized in that: The device includes a housing, with snap-fit ​​holes at both ends. A snap-fit ​​sleeve is provided inside each snap-fit ​​hole. A shaft hole is provided between the snap-fit ​​holes, and a rotating shaft assembly is provided inside the shaft hole. A circuit board is snapped into the bottom of the housing. A semi-cylindrical protrusion is provided at the bottom of the housing. A semi-cylindrical groove matching the semi-cylindrical protrusion is provided on the circuit board. The circuit board is snapped into the semi-cylindrical protrusion at the bottom of the housing through the semi-cylindrical groove.

2. The small-angle sensor according to claim 1, characterized in that: The rotating shaft assembly includes a rotating shaft installed in a shaft hole in the housing. The top part of the rotating shaft extends outward from the shaft hole and protrudes from the housing. A first bearing is provided at one end of the shaft hole opening and sleeved on the rotating shaft. A magnet is provided at the end of the rotating shaft. A magnet sleeve is sleeved between the magnet and the rotating shaft. A second bearing is provided at the end of the magnet sleeve located at the first bearing and sleeved on the rotating shaft. The second bearing is arranged adjacent to the magnet sleeve and maintains a certain distance from the first bearing.

3. The small-angle sensor according to claim 2, characterized in that: The circuit board has chips arranged facing the magnet, the chips are distributed within the magnetic field range of the magnet, and there is a gap between the chips and the magnet.

4. The small-angle sensor according to claim 1, characterized in that: The housing has angular positioning grooves on both sides of the shaft hole.

5. The small-angle sensor according to claim 1, characterized in that: The housing is made of insulating material.

6. The small-angle sensor according to claim 1, characterized in that: The shaft is made of metal.

7. The small-angle sensor according to claim 1, characterized in that: The snap-fit ​​sleeve is made of conductive material.

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