CN217331452U

CN217331452U - Electromagnetic torque sensor

Info

Publication number: CN217331452U
Application number: CN202220696138.XU
Authority: CN
Inventors: 周延峰; 戴旭良; 钮建华; 柏晓华; 倪雪风; 闵月峰
Original assignee: Zhejiang Jiaxue Special Minitype Motors Co ltd
Current assignee: Zhejiang Jiaxue Special Minitype Motors Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-08-30
Anticipated expiration: 2032-03-29

Abstract

The utility model relates to a sensor neck is an electromagnetic torque sensor particularly, including sensor base, control box, left base, right base, the sensor base can divide into left end lid, casing, right-hand member lid three, runs through the sensor base left and right sides by inner rotor axle, external rotor iron core, rear axle, and the rear axle is fixed by hexagon socket head cap screw with the external rotor iron core, and the external rotor iron core inner wall inlays by the bearing frame, the bearing frame is laminated with the rear axle, and the bearing frame inner circle is equipped with third deep groove ball bearing, is equipped with spring washer between its and the rear axle, and third deep groove ball bearing inner circle is connected with the inboard short protruding axle interference fit of inner rotor axle, changes overall structure, avoids electromagnetic interference and magnetic field stack, reduces the whole volume of sensor simultaneously to adapt to the installation demand.

Description

Electromagnetic torque sensor

Technical Field

The utility model relates to a sensor field is an electromagnetic torque sensor particularly.

Background

The conventional electromagnetic induction type torque sensor is characterized in that a plurality of groups of coils are arranged, planar rotors are arranged on two sides of the conventional electromagnetic induction type torque sensor, and the rotor angle is measured through coil voltage by utilizing the principles of electromagnetic induction, eddy current effect and the like.

The torque sensor is plane-extended, has large volume and cannot be completely applied to the field of aviation. Meanwhile, due to the distribution of magnetic lines of force of the planar coil, the eddy current effect of the planar rotor is not obvious, so that the detection signal is weak, and the measurement accuracy is influenced. Because two sets of coils are arranged on two sides of the printed circuit board, the generated magnetic fields are overlapped, although the single-side rotor structure and the corresponding coil set can be changed to realize the independent measurement of signals, the interference cannot be avoided, and therefore an electromagnetic torque sensor needs to be designed.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

Aiming at the defects of the prior art, the utility model provides an electromagnetic torque sensor which can realize the non-contact measurement of torque, has the advantages of high precision, strong anti-interference capability, no need of extra power supply and easy installation, and is very suitable for the torque measurement under the extreme environments of high temperature, high humidity and dust; the high-strength high-. The whole structure is changed, electromagnetic interference and magnetic field superposition are avoided, and the whole volume of the sensor is reduced to adapt to installation requirements.

Technical scheme

The utility model provides a technical scheme that its technical problem adopted is: an electromagnetic torque sensor comprises a sensor base, a control box, a left base and a right base, wherein the sensor base can be divided into a left end cover, a shell and a right end cover, an inner rotor shaft, an outer rotor iron core and a rear shaft penetrate through the left side and the right side of the sensor base, the rear shaft and the outer rotor iron core are fixed by inner hexagonal cylindrical head screws, a bearing seat is embedded in the inner wall of the outer rotor iron core, and the bearing seat is attached to the rear shaft; the inner ring of the bearing seat is provided with a third deep groove ball bearing, a spring washer is arranged between the third deep groove ball bearing and the rear shaft, and the inner ring of the third deep groove ball bearing is connected with the short protruding shaft at the inner side of the inner rotor shaft in an interference fit manner; the inner rotor shaft is provided with a second deep groove ball bearing and a bearing sheath along the outer long shaft in sequence; the bearing sheath is fixedly connected with the outer rotor iron core through pan head screws; the shell and the shell cover plate fixedly coat the connection part of the inner rotor shaft, the outer rotor iron core and the rear shaft; a long shaft of an inner rotor shaft on the inner side of the left end cover is outwards provided with a left sensor, a first deep groove ball bearing and a left wave washer in sequence from the machine shell; and a right sensor, a fourth deep groove ball bearing and a right wave washer are sequentially arranged on the rear shaft at the inner side of the right end cover from the shell cover plate to the outside.

Preferably, the inner rotor shaft, the outer rotor core and the rear shaft have the same axial lead.

Preferably, the control box is arranged at the top of the sensor base and is fixedly connected by a top pan head screw; the front end of the control box is provided with an aviation plug-in, and the aviation plug-in are connected and fixed by a small pan head screw.

Preferably, the inner rotor shaft and the outer shaft are connected with the first deep groove ball bearing and the second deep groove ball bearing in an interference fit mode, and the rear shaft and the fourth deep groove ball bearing are connected in an interference fit mode.

Advantageous effects

Compared with the prior art, the utility model provides an electromagnetic torque sensor, the beneficial effect who possesses: the electromagnetic torque sensor designed by the design reduces the whole volume of the sensor, is suitable for application in the field of aviation, realizes non-contact transmission of torque signals, and detects the signals as digital signals; when the inner rotor shaft, the outer rotor iron core and the rear shaft rotate, the air gap of the magnetic circuit changes, so that the magnetic flux also changes, alternating voltage is induced in the coil, the detection signal is enhanced, and the measurement precision is greatly improved; electromagnetic interference and magnetic field superposition are avoided, and the installation requirement is met.

Drawings

FIG. 1 is a perspective view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

reference numerals are as follows: 1-1. a left base; 1-2. a right base; 2. countersunk head screws; 3. a left sensor; 4. a first deep groove ball bearing; 5. an inner rotor shaft; 6. a left wave washer; 7. a left end cap; 8. a bearing sheath; 9. pan head screws; 10. a housing; 11. an outer rotor core; 12. a control box; 13. a top pan head screw; 14. an aviation plug-in; 15. small pan head screws; 16. a third deep groove ball bearing; 17. a bearing seat; 18. a socket head cap screw; 19. a case cover plate; 20. a right end cap; 21. a spring washer; 22. a fourth deep groove ball bearing; 23. a right wave washer; 24. a rear axle; 25. a second deep groove ball bearing; 26. a right side sensor; 27. a sensor base.

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.

Examples

Referring to fig. 1-2, an electromagnetic torque sensor comprises a sensor base 27, a control box 12, a left base 1-1 and a right base 1-2, wherein the sensor base 27 can be divided into a left end cover 7, a machine shell 10 and a right end cover 20, an inner rotor shaft 5, an outer rotor iron core 11 and a rear shaft 24 penetrate through the left side and the right side of the sensor base 27, the rear shaft 24 and the outer rotor iron core 11 are fixed by inner hexagonal socket head screws 18, a bearing seat 17 is embedded in the inner wall of the outer rotor iron core 11, and the bearing seat 17 is attached to the rear shaft 24; the inner ring of the bearing seat 17 is provided with a third deep groove ball bearing 16, a spring washer 21 is arranged between the third deep groove ball bearing and a rear shaft 24, and the inner ring of the third deep groove ball bearing 16 is connected with a short protruding shaft at the inner side of the inner rotor shaft 5 in an interference fit manner; the inner rotor shaft 5 is provided with a second deep groove ball bearing 25 and a bearing sheath 8 along the outer long shaft in sequence; the bearing sheath 8 and the outer rotor iron core 11 are fixedly connected by a pan head screw 9; the shell 10 and a shell cover plate 19 fixedly coat the connection part of the inner rotor shaft 5, the outer rotor iron core 11 and the rear shaft 24; a long shaft of an inner rotor shaft 5 on the inner side of a left end cover 7 is outwards provided with a left sensor 3, a first deep groove ball bearing 4 and a left wave washer 6 in sequence from a machine shell 10; and a right sensor 26, a fourth deep groove ball bearing 22 and a right wave washer 23 are sequentially arranged on a rear shaft 24 on the inner side of the right end cover 20 from the shell cover plate 19 to the outside.

In a further technical scheme, the axial leads of the inner rotor shaft 5, the outer rotor iron core 11 and the rear shaft 24 are the same.

In a further technical scheme, the control box 12 is arranged at the top of the sensor base 27 and is connected and fixed by a top pan head screw 13; an aviation plug-in 14 is arranged at the front end of the control box 12, and the aviation plug-in are fixedly connected through a small pan head screw 15.

In a further technical scheme, the outer shaft of the inner rotor shaft 5 is connected with the first deep groove ball bearing 4 and the second deep groove ball bearing 25 in an interference fit mode, and the rear shaft 24 is connected with the fourth deep groove ball bearing 22 in an interference fit mode.

The working principle is as follows: when the inner rotor shaft, the outer rotor iron core and the rear shaft rotate, the air gap of the magnetic circuit changes, so that the magnetic flux also changes, and alternating-current voltage is induced in the coil. When torque acts on the torsion shaft, the induced voltages U1 and U2 output by the two magnetoelectric sensors have a phase difference. This phase difference is proportional to the torsion angle of the torsion shaft. Thus, the frequency signal output by the sensor is sent to the frequency meter, the sensor can convert the torsion angle caused by the torque into an electric signal of phase difference, and the frequency signal or the voltage signal which is directly proportional to the torque is directly read.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, and it will be apparent to those skilled in the art that various modifications may be made to the disclosed embodiments, and that other structures may be devised in accordance with the principles of the present invention without departing from the scope of the invention.

Claims

1. An electromagnetic torque sensor, characterized by: the sensor comprises a sensor base (27), a control box (12), a left base (1-1) and a right base (1-2), wherein the sensor base (27) can be divided into a left end cover (7), a shell (10) and a right end cover (20), an inner rotor shaft (5), an outer rotor iron core (11) and a rear shaft (24) penetrate through the left side and the right side of the sensor base (27), the rear shaft (24) and the outer rotor iron core (11) are fixed through inner hexagonal cylinder head screws (18), a bearing seat (17) is embedded in the inner wall of the outer rotor iron core (11), and the bearing seat (17) is attached to the rear shaft (24); a third deep groove ball bearing (16) is arranged on the inner ring of the bearing seat (17), a spring washer (21) is arranged between the third deep groove ball bearing and the rear shaft (24), and the inner ring of the third deep groove ball bearing (16) is connected with a short protruding shaft on the inner side of the inner rotor shaft (5) in an interference fit manner; the inner rotor shaft (5) is provided with a second deep groove ball bearing (25) and a bearing sheath (8) in sequence along the outer long shaft; the bearing sheath (8) is fixedly connected with the outer rotor iron core (11) through a pan head screw (9); the shell (10) and the shell cover plate (19) fixedly coat the connection part of the inner rotor shaft (5), the outer rotor iron core (11) and the rear shaft (24); a long shaft of an inner rotor shaft (5) at the inner side of the left end cover (7) is sequentially provided with a left sensor (3), a first deep groove ball bearing (4) and a left wave washer (6) from the shell (10) to the outside; and a rear shaft (24) at the inner side of the right end cover (20) is provided with a right sensor (26), a fourth deep groove ball bearing (22) and a right wave washer (23) from the casing cover plate (19) to the outside in sequence.

2. An electromagnetic torque transducer according to claim 1, wherein: the axial leads of the inner rotor shaft (5), the outer rotor iron core (11) and the rear shaft (24) are the same.

3. An electromagnetic torque transducer according to claim 1, wherein: the control box (12) is arranged at the top of the sensor base (27) and is connected and fixed by a top pan head screw (13); the front end of the control box (12) is provided with an aviation plug-in (14), and the aviation plug-in are connected and fixed through small pan head screws (15).

4. An electromagnetic torque transducer according to claim 1, wherein: the inner rotor shaft (5) outer shaft is connected with the first deep groove ball bearing (4) and the second deep groove ball bearing (25), and the rear shaft (24) is connected with the fourth deep groove ball bearing (22) in an interference fit mode.