CN212133949U

CN212133949U - Strain type torque sensor

Info

Publication number: CN212133949U
Application number: CN202021124530.4U
Authority: CN
Inventors: 洪骅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-12-11
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses a strain torque sensor, wherein a supporting seat is arranged at the bottom of a machine shell, a stator system is arranged in the supporting seat, an elastic shaft is arranged in the machine shell, and a rotor system is arranged on the elastic shaft; two ends of the elastic shaft are fixed on the shell by fixing units; the rotor system collects torque signals, processes the torque signals and transmits the torque signals to the stator system, and the stator system receives the torque signals and processes the received torque and rotating speed signals through integrating rotating speed signals and outputs the torque and rotating speed signals through the communication module. The utility model adopts the voltage signal generated by the strain bridge to be converted into the digital signal by the AD converter, and the digital signal is converted into the communication signal by the singlechip on the second circuit board through wireless transmission; output signal adopts digital signal, detects that the precision is high, stability is good, interference immunity is strong, need not zero setting repeatedly, but continuous measurement positive and negative moment of torsion, casing and mount pad one-piece type design, and is small, light in weight easily installs and uses, makes the utility model has the characteristics of it is convenient to use, small, detect the precision high.

Description

Strain type torque sensor

Technical Field

The utility model relates to a sensor technical field, more specifically the utility model relates to a strain type torque sensor.

Background

Torque is the most frequently involved parameter in a rotating power system, and in order to detect the rotating torque, a torsion angle phase difference type sensor is used more often. Two sets of gears with the same number of teeth, shape and installation angle are installed at two ends of an elastic shaft, and a proximity (magnetic or optical) sensor is installed at the outer side of each gear. When the elastic shaft rotates, the two groups of sensors can measure two groups of pulse waves, and the torque borne by the elastic shaft can be calculated by comparing the phase difference of the front edge and the rear edge of the two groups of pulse waves. Some torque sensor in the market are because battery powered, so can only use for a short time, and every rotational speed point all has a zero point when using moreover, need zero setting repeatedly, and the volume is great, is difficult for the installation, because the front and back edge of pulse ripples is slow difficult for the comparison during low-speed, consequently low-speed performance is unsatisfactory.

Therefore, how to provide a torque detection sensor which is convenient to use and small in size is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a use convenient, small a strain type torque sensor moreover.

In order to achieve the above object, the present invention provides the following technical solutions, which mainly include: the device comprises a shell, a stator system, a rotor system and an elastic shaft; the motor comprises a shell, an elastic shaft, a stator system, a rotor system, a stator system, a rotor system and a rotor system, wherein the bottom of the shell is provided with a supporting seat, the stator system is arranged in the supporting seat, openings are formed in two sides of the shell, the elastic shaft is arranged in the shell, and the rotor system is arranged on the elastic shaft; two ends of the elastic shaft are fixed on the shell by fixing units; the rotor system carries out torque acquisition, torque signal processing and torque signal transmission, information transmission is carried out between the rotor system and the stator system through the wireless transmitter, and the stator system carries out torque signal receiving, rotating speed signal acquisition, torque rotating speed signal processing, power supply DC/AC circuit and communication interface output.

Preferably, in the above strain-type torque sensor, the fixing unit is composed of a position-limiting sleeve, a gland, a bearing and an end cover; the end covers are fixed on two sides of the shell, the gland is fixed on the gland through threads, and a bearing is arranged between the end covers and the gland; the limiting sleeve is arranged in the end cover; the limiting sleeve, the gland, the bearing and the end cover are coaxial and tightly sleeved on the elastic shaft.

Preferably, in the above strain-type torque sensor, the rotor system is composed of a first circuit board, a strain gauge set, a wireless transmitter, a secondary coil, an AD converter, and a housing; the casing is arranged in the casing, the first circuit board is fixed in the casing and sleeved on the elastic shaft, the strain gauge group is fixed on the casing and sleeved on the elastic shaft, the strain gauge group is connected with the first circuit board through the AD converter, the first circuit board is connected with the secondary coil through an AC/DC line, and the wireless transmitter is arranged on the first circuit board.

Preferably, in the above strain-type torque sensor, the strain gauge set is composed of a mounting plate, a toothed plate, a magnetic conduction frame, a strain gauge, a magnetic conduction ring, a coil frame, a spacer ring and a washer; the mounting plate is fixed on the housing, the fluted disc is fixed on the mounting plate, the magnetic conduction frame is mounted at the bottom of the mounting plate, the magnetic conduction ring is arranged on the magnetic conduction frame, the strain gauge is arranged between the magnetic conduction frame and the magnetic conduction ring, the coil rack is arranged on one side of the magnetic conduction frame, and the spacer ring and the gasket are arranged between the coil rack and the end cover; and a secondary coil is arranged on the coil rack, and the strain gauge is connected with the first circuit board through an AD converter.

Preferably, in the above strain-type torque sensor, the stator system is composed of a second circuit board, a communication module, a speed measuring unit, a power supply circuit, a main coil, and a wireless receiver; the speed measuring unit is fixed on the shell, corresponds to the position of the fluted disc and is electrically connected with the second circuit board, the power supply circuit is connected with the second circuit board to supply power to the second circuit board and the main coil, and simultaneously the main coil and the secondary coil generate induced current to supply power to the first circuit board and the strain gauge group through an AC/DC (alternating current/direct current) circuit.

Preferably, in the above strain type torque sensor, opposing key grooves are provided at both ends of the elastic shaft.

Preferably, in the above strain-type torque sensor, the housing diameter is smaller than the casing inner diameter.

Preferably, in the strain-type torque sensor, a power amplifier is provided in the power supply circuit.

According to the technical scheme, compared with the prior art, the utility model discloses a strain torque sensor, the utility model discloses a voltage signal that adopts strain bridge to produce is converted into digital signal by AD converter, through wireless transmission, is converted into communication signal through the singlechip on the second circuit board; the output signal adopts a digital signal, the detection precision is high, the stability is good, the anti-interference performance is strong, the repeated zero setting is not needed, the positive and negative torques can be continuously measured, the integrated design of the machine shell and the mounting seat is adopted, the volume is small, the weight is light, and the installation and the use are easy; make the utility model has the characteristics of it is convenient to use, small, the detection precision is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the appearance structure of the present invention.

Fig. 3 is a schematic circuit flow diagram according to the present invention.

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.

Please refer to fig. 1-3, which illustrate a strain type torque sensor according to the present invention.

The utility model discloses, mainly include: the device comprises a shell 1, a stator system 3, a rotor system 4 and an elastic shaft 2; the bottom of the machine shell 1 is provided with a supporting seat 25, a stator system 3 is arranged in the supporting seat 25, openings are formed in two sides of the machine shell 1, the elastic shaft 2 is arranged in the machine shell 1, and a rotor system 4 is arranged on the elastic shaft 2; two ends of the elastic shaft 2 are fixed on the machine shell 1 by fixing units 101; the rotor system 4 carries out torque acquisition, torque signal processing and torque signal transmission, and transmits information with the stator system through a wireless transmitter, and the stator system 3 carries out torque signal receiving, rotating speed signal acquisition, torque and rotating speed signal processing, power supply DC/AC circuit and communication interface output.

In order to further optimize the technical scheme, the fixing unit 101 consists of a limiting sleeve 8, a gland 9, a bearing 10 and an end cover 11; the end covers 11 are fixed on two sides of the machine shell 1, the gland 9 is fixed on the end covers 11 through threads, and a bearing 10 is arranged between the end covers 11 and the gland 9; the limiting sleeve 8 is arranged in the gland 9; the limiting sleeve 8, the gland 9, the bearing 10 and the end cover 11 are coaxial and tightly sleeved on the elastic shaft 2.

In order to further optimize the above technical solution, the rotor system 4 is composed of a first circuit board 13, a strain gauge set 102, a wireless transmitter, a secondary coil, an AD converter and a housing 12; the housing 12 is disposed inside the casing, the first circuit board is fixed in the housing and sleeved on the elastic shaft, the strain gauge set 102 is fixed on the casing 1 and sleeved on the elastic shaft 2, the strain gauge set 102 is connected with the first circuit board 13 through an AD converter, the first circuit board 13 is connected with the secondary coil through an AC/DC line, and the wireless transmitter is disposed on the first circuit board 13.

In order to further optimize the technical scheme, the strain gauge set 102 consists of a mounting plate 14, a fluted disc 15, a magnetic conduction frame 16, a strain gauge, a magnetic conduction ring 17, a coil frame 18, a spacer ring 19 and a gasket 20; the mounting plate 14 is fixed on the housing 12, the fluted disc 15 is fixed on the mounting plate 14, the magnetic conduction frame 16 is mounted at the bottom of the mounting plate 14, the magnetic conduction ring 17 is arranged on the magnetic conduction frame 16, a strain gauge is arranged between the magnetic conduction frame 16 and the magnetic conduction ring 17, a coil rack 18 is arranged on one side of the magnetic conduction frame 16, and the spacer ring 19 and the gasket 20 are arranged between the coil rack 18 and the end cover 11; a secondary coil is arranged on the coil former 18, and the strain gauge is connected with the first circuit board 13 through an AD converter.

In order to further optimize the technical scheme, the stator system 3 is composed of a second circuit board 6, a communication module 22, a speed measuring unit 5, a power supply circuit, a main coil and a wireless receiver; the second circuit board 6 is fixed in the supporting seat 21, the supporting seat 21 is provided with the cover plate 7, the communication module 22 is fixed on the surface of the supporting seat 21 and electrically connected with the second circuit board 6, the second circuit board 6 is provided with the main coil and the wireless receiver, the speed measuring unit 5 is fixed on the casing 1 and corresponds to the position of the fluted disc 15 and is electrically connected with the second circuit board 6, the power supply circuit is connected with the second circuit board 6 to supply power to the second circuit board 6 and the main coil, and the main coil and the secondary coil generate induced current to supply power to the first circuit board 13 and the strain gauge set 102 through the AC/DC line.

In order to further optimize the technical scheme, opposite key grooves are formed in the two ends of the elastic shaft 2.

In order to further optimize the above technical solution, the diameter of the casing 12 is smaller than the inner diameter of the casing 1.

In order to further optimize the technical scheme, a power amplifier is arranged on the power supply circuit.

In order to further optimize the technical scheme, the strain gauges are 4 groups of strain gauges to form a Wheatstone bridge.

In order to further optimize the technical scheme, the elastic shaft 2 is deformed by torsion, the strain bridge on the shaft generates linear voltage difference, a digital signal is generated directly through a high-precision 24-bit AD conversion chip and is subjected to data processing by the first circuit board 13, the wireless signal receiver of the stator system 3 receives torque wireless signals sent by a rotor, the speed measuring unit 5 measures pulse signals of rotation of the fluted disc 15 on the shaft through a photoelectric sensor, the pulse signals are processed by the second circuit board 6 uniformly, the communication module 21 sends out data according to appointed time, the power supply part is subjected to oscillation starting fixed frequency, signal processing and power amplification, and the secondary coil generates alternating current through electromagnetic induction of the primary coil.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A strain-type torque sensor, comprising: the device comprises a shell, a stator system, a rotor system and an elastic shaft; the motor comprises a shell, an elastic shaft, a stator system, a rotor system, a stator system, a rotor system and a rotor system, wherein the bottom of the shell is provided with a supporting seat, the stator system is arranged in the supporting seat, openings are formed in two sides of the shell, the elastic shaft is arranged in the shell, and the rotor system is arranged on the elastic shaft; two ends of the elastic shaft are fixed on the shell by fixing units; wherein, the above; the rotor system collects torque signals, transmits the torque signals to the stator system through the wireless transmitter after processing, and processes the received torque and rotating speed signals through integrating rotating speed signals after the stator system receives the torque signals and outputs the torque and rotating speed signals through the communication module.

2. The strain torque sensor as claimed in claim 1, wherein the fixing unit is composed of a stop collar, a gland, a bearing and an end cap; the end covers are fixed on two sides of the shell, the gland is fixed on the end covers through threads, and a bearing is arranged between the end covers and the gland; the limiting sleeve is arranged in the gland; the limiting sleeve, the gland, the bearing and the end cover are coaxial and tightly sleeved on the elastic shaft.

3. A strain torque transducer according to claim 1, wherein the rotor system is composed of a first circuit board, a strain gauge set, a wireless transmitter, a secondary coil, an AD converter and a housing; the casing is arranged in the casing, the first circuit board is fixed in the casing and sleeved on the elastic shaft, the strain gauge group is fixed on the casing and sleeved on the elastic shaft, the strain gauge group is connected with the first circuit board through the AD converter, the first circuit board is connected with the secondary coil through an AC/DC line, and the wireless transmitter is arranged on the first circuit board.

4. The strain torque transducer as claimed in claim 3, wherein the strain gauge set is composed of a mounting plate, a fluted disc, a magnetic conductive frame, a strain gauge, a magnetic conductive ring, a coil frame, a spacer ring and a washer; the mounting plate is fixed on the housing, the fluted disc is fixed on the mounting plate, the magnetic conduction frame is mounted at the bottom of the mounting plate, the magnetic conduction ring is arranged on the magnetic conduction frame, the strain gauge is arranged between the magnetic conduction frame and the magnetic conduction ring, the coil rack is arranged on one side of the magnetic conduction frame, and the spacer ring and the gasket are arranged between the coil rack and the end cover; and a secondary coil is arranged on the coil rack, and the strain gauge is connected with the first circuit board through an AD converter.

5. The strain torque sensor as claimed in claim 1, wherein the stator system is composed of a second circuit board, a communication module, a speed measuring unit, a power supply circuit, a main coil and a wireless receiver; the speed measuring unit is fixed on the shell, corresponds to the position of the fluted disc and is electrically connected with the second circuit board, the power supply circuit is connected with the second circuit board to supply power to the second circuit board and the main coil, and simultaneously the main coil and the secondary coil generate induced current to supply power to the first circuit board and the strain gauge group through an AC/DC (alternating current/direct current) circuit.

6. A strain torque transducer as claimed in claim 1, wherein opposing keyways are provided at opposite ends of the flexible shaft.

7. A strain torque transducer as claimed in claim 3, wherein the housing diameter is smaller than the casing internal diameter.

8. The strain torque sensor as claimed in claim 5, wherein a power amplifier is provided on the power supply circuit.