CN217424267U

CN217424267U - Sealed magnetic-sensing brushless angle sensor

Info

Publication number: CN217424267U
Application number: CN202221273570.4U
Authority: CN
Inventors: 李衡; 李侠; 刘振佳
Original assignee: Hebei Yinghu Agricultural Machinery Manufacturing Co Ltd
Current assignee: Hebei Yinghu Agricultural Machinery Manufacturing Co Ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-13
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a sealed magnetic-sensing brushless angle sensor, which comprises a cover plate and a shell fixing seat, wherein a sealing groove is arranged between the cover plate and the shell fixing seat and is sealed by ultrasonic welding, the inside of the shell fixing seat is movably connected with a rotating shaft, a magnet is arranged inside the top end of the rotating shaft, a retainer ring is fixedly arranged outside the rotating shaft and inside the shell fixing seat, a rotating limiting block is arranged below the retainer ring arranged at one side of the rotating shaft, a connecting rod is fixed at the bottom of the rotating shaft through two internal fastening screw grooves arranged inside the rotating shaft, a magnetic-sensing element is fixedly arranged outside one side of the magnet and inside the shell fixing seat, a PCB circuit board is fixedly arranged inside the shell fixing seat, the bottom of the PCB circuit board is fixedly connected with the magnetic-sensing element and is electrically connected with the magnetic-sensing element, the utility model adopts magnetic-sensing rotary induction to replace an electric brush, thereby greatly reducing mechanical abrasion, the service life of the equipment is prolonged remarkably, and the full-sealing mode is adopted, so that the damp and dust can be prevented from falling into the equipment.

Description

Sealed magnetic-sensing brushless angle sensor

Technical Field

The utility model relates to a sensor technical field specifically is a sealed magnetic sensing brushless angle sensor.

Background

The angle sensor, as the name implies, is used to detect an angle. It has a hole in its body to fit the shaft of the musical instrument. When attached to the RCX, the angle sensor counts every 1/16 shaft revolutions. When the rotation is made in one direction, the count is increased, and when the rotation direction is changed, the count is decreased. The count is related to the initial position of the angle sensor. When the angle sensor is initialized, its count value is set to 0, and you can reset it back to the original programmed state if necessary.

The existing angle sensor product technology mostly adopts the principle of a thin film potentiometer, and has the following objective defects: 1. the signal transmission depends on an electric brush, mechanical abrasion is caused, the service life is not long enough, 2, the shock resistance is poor, poor contact is easy to generate and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealed magnetic-sensing brushless angle sensor to solve the problem that above-mentioned background art provided.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a sealed magnetic-sensing brushless angle sensor, includes apron and shell fixing base, be provided with the seal groove between apron and the shell fixing base to it is sealed through ultrasonic welding, the inside swing joint of shell fixing base has the rotation axis, the top internally mounted of rotation axis has the magnet, the outside of rotation axis is located the fixed rand that is equipped with in inside of shell fixing base, one side of rotation axis is located the below of rand is equipped with rotatory stopper, the bottom of rotation axis is fixed with the connecting rod through two interior fastening spiral shells that inside was seted up, one side outside of magnet is located the inside of shell fixing base is fixed and is equipped with magnetic-sensing element, the inside fixed mounting of shell fixing base has PCB circuit board, PCB circuit board's bottom fixed connection magnetic-sensing element and with the magnetic-sensing element electricity is connected.

Preferably, a rotating shaft sealing ring is embedded between the shell fixing seat and the rotating shaft.

Preferably, the housing fixing seat is internally provided with a connecting sealing surface.

Preferably, a through groove is formed in the cover plate on the inner side of the connecting sealing surface, an electrical connection pin penetrates through the through groove, one end of the electrical connection pin is electrically connected with the PCB, and the other end of the electrical connection pin is connected with an external plug hole.

Preferably, the base material of the PCB circuit board is double-layer epoxy resin, double-sided copper plating is adopted, a resistor, a capacitor, an operational amplifier, a power supply, a reference voltage source and a power device are placed on the upper layer, and the magneto-sensitive element and a digital processing device are placed on the lower layer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this practicality replaces the brush through adopting the quick rotary induction of magnetism, and the mechanical wear that significantly reduces is showing the life of extension equipment to at the during operation and adopt the totally enclosed mode, can avoid equipment to wet and the dust falls into.

2. The utility model discloses owing to adopt the magnetic-sensing rotary induction, avoided producing the problem that the contact failure influences the performance because of vibrations to because shell and apron adopt weatherability plastics injection moulding, weather environmental suitability is good, and the normal operating of equipment is guaranteed in the influence that can be better reduction difference in temperature brought.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is an overall structure diagram of the present invention;

fig. 3 is an electrical implementation schematic diagram of the present invention.

In the figure: 1. the magnetic sensor comprises a cover plate, 2, a sealing groove, 3, a PCB circuit board, 4, an electrical connection needle, 5, a connection sealing surface, 6, a magnetic sensing element, 7, a rotation limiting block, 8, a magnet, 9, a rotation shaft sealing ring, 10, an inner fastening screw groove, 11, a shell fixing seat, 12, a clamping ring, 13 and a rotation shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a sealed magnetic-sensing brushless angle sensor comprises a cover plate 1 and a shell fixing seat 11, a sealing groove 2 is arranged between the cover plate 1 and the shell fixing seat 11, and seal through ultrasonic welding, make apron 1 and shell fixing base 11 fastening installation after the melting sealed, the inside swing joint of shell fixing base 11 has rotation axis 13, the top internally mounted of rotation axis 13 has magnet 8, the outside of rotation axis 13 is located the inside fixed rand 12 that is equipped with of shell fixing base 11, one side of rotation axis 13 is located the below of rand 12 and is equipped with rotatory stopper 7, two interior fastening screw grooves 10 that the inside was seted up are fixed with the connecting rod in the bottom of rotation axis 13, the outside inside that is located shell fixing base 11 of one side of magnet 8 is fixed and is equipped with magnetic sensing element 6, the inside fixed mounting of shell fixing base 11 has PCB circuit board 3, the bottom fixed connection magnetic sensing element 6 of PCB circuit board 3 just is connected with magnetic sensing element 6 electricity.

The outer empty round hole position is put into from the lower part to rotation axis 13, rotation axis 13 sets up the seal groove with the inside round hole coupling part of shell fixing base 11, rotation axis sealing washer 9 imbeds in the seal groove, the inside round hole internal surface of shell fixing base 11 is the smooth surface, rotation axis sealing washer 9 and the interior smooth surface stress contact of accuse of shell, wear-resisting and damping are moderate, it makes rotation axis 13 can not drop to fix through rand 12 between the round hole of rotation axis 13 and the inside of shell fixing base 11, there is mechanical rotation stopper 7 between the round hole of rotation axis 13 and the inside of shell fixing base 11, the restriction axle moves at 0-180 degree within range, it gets convenience to satisfy the on-the-spot installation of product.

In this embodiment, the inboard of connecting sealed face 5 is located the inside of apron 1 and has seted up logical groove, it has electric connection needle 4 to run through the inside of logical groove, the one end and the 3 electricity of PCB circuit board of electric connection needle 4 are connected, outside plug hole is connected to the other end of electric connection needle 4, electric connection needle 4 is integrative for the embedding of moulding plastics with the shell fixing base, electric connection needle 4 and plug jogged joint, upper portion is detained through the buckle, the plug realizes that the electric connector is sealed on sealed face 5 with the connector part through the cushion pressfitting.

In this embodiment, the substrate of the PCB 3 is a double-layer epoxy resin, and is plated with copper on both sides, the upper layer is placed with resistors, capacitors, operational amplifiers, power supplies, reference voltage sources and power devices, and the lower layer is placed with the magneto-sensitive element 6 and the digital processing device.

The working principle is as follows: the utility model relates to a sealed magnetic-sensing brushless angle sensor, firstly, when an external connecting rod drives a rotating shaft 13 to rotate, the array of magnetic-sensing elements 6 can sense the magnetic field intensity and the phase change of a magnet 8, and converts the change into a voltage signal to be output, the data processor DSP controls the analog-to-digital converter ADC to sample the voltage signal sensed and converted by the magnetic sensing element at a high speed, a sampling value is processed by the DSP operation to obtain a change value of a plane angle, the signal is converted into an analog signal which is in linear relation with the angle through a digital-to-analog converter, the signal is converted into an output current signal through a transmitting circuit such as an operational amplifier, the current signal is connected with an external plug hole through an electric connecting pin 4, the signal is transmitted out to act as a control end of a client, and a measured signal parameter can be quickly calibrated and measured through a programming point and a test point on a circuit board, so that high-efficiency batch production is facilitated.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a sealed magnetic sensing brushless angle sensor, includes apron (1) and shell fixing base (11), be provided with seal groove (2) between apron (1) and shell fixing base (11) to it is sealed through ultrasonic bonding, its characterized in that: a rotating shaft (13) is movably connected inside the shell fixing seat (11), a magnet (8) is installed inside the top end of the rotating shaft (13), a clamping ring (12) is fixedly arranged at the outer side of the rotating shaft (13) and positioned in the shell fixing seat (11), a rotating limit block (7) is arranged below the retainer ring (12) on one side of the rotating shaft (13), the bottom of the rotating shaft (13) is fixed with a connecting rod through two internal fastening screw grooves (10) arranged inside, a magnetic sensing element (6) is fixedly arranged outside one side of the magnet (8) and inside the shell fixing seat (11), the PCB (3) is fixedly arranged in the shell fixing seat (11), the bottom of the PCB circuit board (3) is fixedly connected with the magneto-sensitive element (6) and is electrically connected with the magneto-sensitive element (6).

2. A sealed, magnetically sensitive, brushless angle sensor as in claim 1, wherein: a rotary shaft sealing ring (9) is embedded between the shell fixing seat (11) and the rotary shaft (13).

3. A sealed, magnetically sensitive, brushless angle sensor as in claim 2, wherein: and a connecting sealing surface (5) is arranged in the shell fixing seat (11).

4. A sealed, magnetically sensitive, brushless angle sensor as in claim 3, wherein: the inner side of the connecting sealing surface (5) is positioned in the cover plate (1) and is provided with a through groove, an electrical connecting needle (4) penetrates through the through groove, one end of the electrical connecting needle (4) is electrically connected with the PCB (3), and the other end of the electrical connecting needle (4) is connected with an external plug hole.

5. A sealed, magnetically sensitive, brushless angle sensor as in claim 1, wherein: the PCB is characterized in that the base material of the PCB (3) is double-layer epoxy resin, double-sided copper plating is adopted, a resistor, a capacitor, an operational amplifier, a power supply, a reference voltage source and a power device are placed on the upper layer, and the magneto-dependent element (6) and a digital processing device are placed on the lower layer.