CN215952827U

CN215952827U - Non-contact magnetic coupling torque sensor

Info

Publication number: CN215952827U
Application number: CN202121901756.5U
Authority: CN
Inventors: 史文全; 周琦; 吴志勇; 丁艳玲
Original assignee: Dongguan Nanli Sensing Apparatus Co ltd
Current assignee: Dongguan Nanli Sensing Apparatus Co ltd
Priority date: 2021-08-14
Filing date: 2021-08-14
Publication date: 2022-03-04
Anticipated expiration: 2031-08-14

Abstract

The utility model relates to the technical field of torque sensors, in particular to a non-contact magnetic coupling torque sensor, which comprises a stator, a rotor and a rotating shaft, wherein the rotating shaft is used for being connected with an external driving mechanism; the end face, close to the stator, of the rotor is provided with a first circuit board, the end face, close to the rotor, of the stator is provided with a second circuit board, and magnetic coupling is formed between the first circuit board and the second circuit board. The utility model aims to provide a non-contact magnetic coupling torque sensor, which solves the problem that the traditional non-contact torque sensor is low in precision and reliability.

Description

Non-contact magnetic coupling torque sensor

Technical Field

The utility model relates to the technical field of torque sensors, in particular to a non-contact magnetic coupling torque sensor.

Background

At present, torque sensors are classified into two categories, namely dynamic torque sensors and static torque sensors, wherein the dynamic torque sensors can be called torque sensors, torque rotating speed sensors, non-contact torque sensors, rotating torque sensors and the like, the torque sensors are used for detecting torsion torque on various rotating or non-rotating mechanical parts, and the torque sensors convert physical changes of torsion into accurate electric signals. The non-contact torque sensor consists of a stator and a rotor, and the sensor is arranged on the rotor; through a coil coupling mode, the stator wirelessly supplies power to the rotor, and the rotor wirelessly transmits data to the stator; the stator and the rotor are both provided with coils, and the coils (enameled wires) are wound on a special framework (made of aluminum, iron or magnetic materials); because the coil is with high costs, difficult installation and account for the space big, skeleton weight is big simultaneously, leads to the pivot rotation inertia big, influences sensor measurement accuracy and reliability.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a non-contact magnetic coupling torque sensor, which solves the problem that the traditional non-contact torque sensor is low in precision and reliability.

The utility model is realized by the following technical scheme:

a non-contact magnetic coupling torque sensor comprises a stator, a rotor and a rotating shaft, wherein the rotating shaft is used for being connected with an external driving mechanism, the rotor is coaxially and rotatably connected with the rotating shaft, and the stator and the rotor are arranged at intervals; the end face, close to the stator, of the rotor is provided with a first circuit board, the end face, close to the rotor, of the stator is provided with a second circuit board, and magnetic coupling is formed between the first circuit board and the second circuit board.

The stator and the rotor are both in a cylinder structure.

The other end face of the rotor extends outwards to form a protruding part, and the side wall of the protruding part is provided with a plurality of through holes arranged at equal intervals; and a counting assembly for detecting the through holes is arranged above the rotating shaft.

Wherein the counting assembly is a reflective optical sensor.

Wherein, one side of the stator is provided with a groove.

The sensor further comprises a shell, two bearings are arranged on the shell, and the bearings are respectively sleeved at two ends of the rotating shaft.

The sensor also comprises a third circuit board, wherein the third circuit board is provided with an electric connector electrically connected with the third circuit board; the third circuit board is electrically connected with the second circuit board.

And a sealing ring is arranged between the electric connecting port and the shell.

Wherein, the pivot is equipped with the ground connection piece that is used for ground connection.

Wherein, the grounding piece is a screw.

The utility model has the beneficial effects that:

the problem of traditional non-contact torque sensor precision and reliability lower is solved: according to the non-contact magnetic coupling torque sensor, the first circuit board and the second circuit board are arranged on the stator and the rotor, wireless power supply of the second circuit board to the first circuit board is achieved through magnetic coupling between the first circuit board and the second circuit board, meanwhile, the rotor transmits wireless data to the stator, and the torque value detected by the current sensor can be read out by reading the data on the stator and calculating the data through a corresponding control algorithm. Compared with the traditional torque sensor, the utility model does not need to use a coil and a framework, realizes the same effect through magnetic coupling between circuit boards, and solves the problem of lower precision and reliability of the traditional non-contact torque sensor.

Drawings

The utility model is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the utility model, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic structural diagram of the rotating shaft, the stator and the rotating shaft.

Fig. 3 is a cross-sectional view of the present invention.

FIG. 4 is a circuit control diagram of the magnetic coupling of the present invention.

Reference numerals

The stator comprises a stator 100, a second circuit board 101, a groove 102, a rotor 200, a first circuit board 201, a protrusion 202, a through hole 203, a rotating shaft 300, a grounding piece 301, a counting assembly 400, a shell 500, a bearing 501, a third circuit board 502, an electric connection port 503 and a sealing ring 504.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It should be noted that the structures shown in the drawings are only used for matching the disclosure of the present invention, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance, and any modifications or adjustments of the structures should still fall within the scope of the technical contents of the present invention without affecting the function and the achievable purpose of the present invention.

As shown in fig. 1 to 4, a non-contact magnetic coupling torque sensor includes a stator 100, a rotor 200 and a rotating shaft 300, wherein the rotating shaft 300 is used for connecting with an external driving mechanism, the rotor 200 is coaxially and rotatably connected with the rotating shaft 300, and the stator 100 and the rotor 200 are arranged at intervals; one end face of the rotor 200 close to the stator 100 is provided with a first circuit board 201, one end face of the stator 100 close to the rotor 200 is provided with a second circuit board 101, and magnetic coupling is formed between the first circuit board 201 and the second circuit board 101. The principle of magnetic coupling of the first circuit board 201 and the second circuit board 101 is shown in fig. 4.

In the present embodiment, the first circuit board 201 and the second circuit board 101 are PCBs.

Specifically, according to the non-contact magnetic coupling torque sensor, the first circuit board 201 and the second circuit board 101 are arranged on the stator 100 and the rotor 200, wireless power supply of the second circuit board 101 to the first circuit board 201 is achieved through magnetic coupling between the first circuit board 201 and the second circuit board 101, meanwhile, the rotor 200 transmits wireless data to the stator 100, and the torque value detected by the current sensor can be read out by reading the data on the stator 100 and calculating the data through a corresponding control algorithm. Compared with the traditional torque sensor, the utility model does not need to use a coil and a framework, realizes the same effect through magnetic coupling between circuit boards, and solves the problem of lower precision and reliability of the traditional non-contact torque sensor.

Specifically, the stator 100 and the rotor 200 are both cylindrical structures, so that the space of the sensor is saved.

Specifically, a protrusion 202 is formed on the other end surface of the rotor 200 and extends outwards, and a plurality of through holes 203 are formed in the side wall of the protrusion 202 at equal intervals; a counting assembly 400 for detecting the through hole 203 is arranged above the rotating shaft 300. Reading through holes 203 with equal distances on the surface of the counting assembly 400 to assist in counting; when the rotating shaft 300 rotates, the counting assembly 400 realizes a counting function, generates a pulse square wave signal and outputs the pulse square wave signal, and calculates the rotating speed. Preferably, the counting assembly 400 is a reflective optical sensor.

Specifically, one side of the stator 100 is provided with a groove 102, which is convenient for taking the first circuit board 201.

Specifically, the sensor further includes a housing 500, the housing 500 is provided with two bearings 501, and the bearings 501 are respectively sleeved at two ends of the rotating shaft 300. The housing 500 can protect the devices inside the sensor, and the bearing 501 can ensure the stability of the rotating shaft 300 during rotation.

Specifically, the sensor further comprises a third circuit board 502, wherein the third circuit board 502 is provided with an electrical connection port 503 electrically connected with the third circuit board 502; the third circuit board 502 is electrically connected to the second circuit board 101. In this embodiment, the electrical connection port 503 is an 8pin male connector, and the torque value of the sensor can be read by using a corresponding instrument through electrical connection and matching with an 8pin female connector of the same type.

Specifically, a seal ring 504 is provided between the electrical connection port 503 and the housing 500, so that the sealing property in the sensor can be increased.

Specifically, the rotating shaft 300 is provided with a grounding piece 301 for grounding, and since the material of the rotating shaft 300 is usually stainless steel or other alloy materials, tin (or tin wire) cannot be welded on the rotating shaft 300; in addition, a pressure sensor and a circuit board are installed on the rotating shaft 300, and the anti-interference capability of the sensor can be improved by arranging the grounding piece 301. Preferably, the grounding member 301 is a screw.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A contactless magnetically-coupled torque sensor, characterized by: the motor comprises a stator (100), a rotor (200) and a rotating shaft (300), wherein the rotating shaft (300) is used for being connected with an external driving mechanism, the rotor (200) is coaxially and rotatably connected with the rotating shaft (300), and the stator (100) and the rotor (200) are arranged at intervals;

one end face, close to the stator (100), of the rotor (200) is provided with a first circuit board (201), one end face, close to the rotor (200), of the stator (100) is provided with a second circuit board (101), and magnetic coupling is formed between the first circuit board (201) and the second circuit board (101).

2. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the stator (100) and the rotor (200) are both of cylindrical structures.

3. A contactless magnetically-coupled torque sensor according to claim 1, wherein: a convex part (202) is arranged on the other end face of the rotor (200) in an outward extending mode, and a plurality of through holes (203) are arranged on the side wall of the convex part (202) at equal intervals; and a counting assembly (400) for detecting the through hole (203) is arranged above the rotating shaft (300).

4. A contactless magnetically-coupled torque sensor according to claim 3, wherein: the counting assembly (400) is a reflective optical sensor.

5. A contactless magnetically-coupled torque sensor according to claim 1, wherein: one side of the stator (100) is provided with a groove (102).

6. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the sensor further comprises a shell (500), two bearings (501) are arranged on the shell (500), and the bearings (501) are respectively sleeved at two ends of the rotating shaft (300).

7. A contactless magnetically-coupled torque sensor according to claim 6, wherein: the sensor further comprises a third circuit board (502), the third circuit board (502) is provided with an electric connecting port (503) electrically connected with the third circuit board (502); the third circuit board (502) is electrically connected with the second circuit board (101).

8. A contactless magnetically-coupled torque sensor according to claim 7, wherein: and a sealing ring (504) is arranged between the electric connecting port (503) and the shell (500).

9. A contactless magnetically-coupled torque sensor according to claim 1, wherein: the rotating shaft (300) is provided with a grounding piece (301) for grounding.

10. A contactless magnetically-coupled torque sensor according to claim 9, wherein: the grounding piece (301) is a screw.