CN112798162A

CN112798162A - Dynamic torque sensor

Info

Publication number: CN112798162A
Application number: CN202110279200.5A
Authority: CN
Inventors: 古永国; 董国平; 王佳; 徐阳
Original assignee: Hebei Yusheng Construction Engineering Co ltd
Current assignee: Hebei Yusheng Construction Engineering Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-05-14

Abstract

The invention provides a dynamic torque sensor, which belongs to the technical field of torque sensors and comprises a shell, a transmission shaft, a circuit board fixing ring, a bearing, a conductive inner copper sleeve, a conductive outer copper sleeve, an O-shaped sealing ring, a power supply contact and a signal output contact, wherein the torque of a measured object can be measured through the rotation of the transmission shaft; the torque measurement is output to the outside of the shell, and compared with the traditional torque sensor, the torque measurement device is high in sensitivity, good in signal, stable and reliable in operation, short in time delay, good in physical fixing performance, stable in connection, simple in structure and greatly reduced in production cost.

Description

Dynamic torque sensor

Technical Field

The invention belongs to the technical field of torque sensors, and particularly relates to a dynamic torque sensor.

Background

The torque sensor is a precision measuring instrument for measuring various torques, rotating speeds and mechanical powers, has a wide application range, is mainly used for detecting the output torques and powers of rotary power equipment such as motors, engines, internal combustion engines and the like, is also used for detecting the torques and powers of fans, water pumps, gear boxes and torque wrenches, is also used for detecting the torques and powers in railway locomotives, automobiles, tractors, airplanes, ships and mining machinery, is also used for detecting the torques and powers in sewage treatment systems, is also used for manufacturing viscometers, and can also be used in process industry and flow industry.

At present, the dynamic torque sensors of the same kind of technology at home and abroad mainly comprise: the sensor comprises a coupling sensor, a carbon brush sensor and a bearing conductive sensor, wherein the carbon brush sensor is mainly adopted in Germany, and the bearing conductive sensor is mainly adopted in Japan; the coupling type sensor is generally adopted in China, and has the following defects: unstable and unreliable operation, low measurement precision, slow reaction speed, long time delay and high cost.

In addition, the dynamic torque sensor in the prior art only adopts a single bearing to support the transmission shaft, the operation is unstable, a large error exists between the output of a torque signal and an actual torque value, the measurement is inaccurate, power supply and output signals are all welded on an inner ring and an outer ring of the bearing, the inner ring and the outer ring of the bearing are respectively isolated from the transmission shaft and a shell by generally adopting insulating materials, strain areas on the transmission shaft are deviated from one side, the measurement precision is influenced, and a screw hole, a square groove and the like are arranged on the transmission shaft so as to be convenient for installing clamping and the like, so that the processing cost is correspondingly improved.

Disclosure of Invention

The invention aims to provide a dynamic torque sensor, and aims to solve the technical problems of unstable operation, low reliability and long delay time of a torque sensor in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the dynamic torque sensor comprises a shell, a transmission shaft, a circuit board fixing ring, a bearing, a conductive inner copper sleeve, a conductive outer copper sleeve, an O-shaped sealing ring, a power supply contact and a signal output contact;

the shell is hollow, end holes are formed in two ends of the shell, and an opening is formed in the upper end of the shell; the transmission shaft is sleeved in the shell in a penetrating manner, penetrates through the end hole at one end and penetrates out of the end hole at the other end, the transmission shaft can rotate in the shell, a strain area is arranged in the middle of the transmission shaft, and the end part of the transmission shaft is used for being connected with a measured torque medium; the circuit board fixing ring is coaxially sleeved in the middle of the transmission shaft and is not in contact with the transmission shaft, a through hole is formed in the circuit board fixing ring, the circuit board fixing ring is used for fixedly mounting a circuit board, and the circuit board is used for collecting a torque signal of a strain area on the transmission shaft; the bearing is at least two groups, the bearings are coaxially arranged in the shell in parallel, sleeved on the transmission shaft and positioned on two sides of the circuit board fixing ring, a plurality of groups of the bearings are coaxially arranged with the end hole and the transmission shaft, an isolation magnetic sleeve and conductive grease are arranged at the joint of the plurality of groups of the bearings, the isolation magnetic sleeve is used for enabling the plurality of groups of the bearings to form a gap, and the conductive grease is used for transmitting electric signals among the plurality of the bearings; the conductive inner copper sleeve is coaxially sleeved on the transmission shaft, positioned inside the plurality of groups of bearings, coaxially arranged with the bearings and used for supporting the plurality of groups of bearings to rotate, capable of transmitting electric signals, provided with a mounting hole aligned with a through hole in a circuit board fixing ring, and fixedly connected with the conductive inner copper sleeve through a connecting piece sequentially penetrating through the through hole and the mounting hole; the conductive outer copper sleeve is coaxially sleeved on the plurality of groups of bearings, is positioned outside the plurality of groups of bearings, is coaxially arranged with the bearings, is used for wrapping the plurality of groups of bearings to rotate, and can transmit electric signals on the conductive outer copper sleeve; the O-shaped sealing rings are uniformly distributed on the inner circumference of the conductive inner copper sleeve and are contacted with the outer wall of the transmission shaft, and are also uniformly distributed on the outer circumference of the conductive outer copper sleeve and are contacted with the inner wall of the shell, and the O-shaped sealing rings are respectively used for suspending and supporting the bearing, the shell and the transmission shaft, and achieving a free state, reducing friction force, improving insulativity and improving sensitivity; the power supply contact is arranged in the shell in a penetrating mode, the outer end of the power supply contact is used for being connected with a power supply source, and the inner end of the power supply contact is used for being abutted to the outer wall of the conductive outer copper sleeve and used for supplying power to the circuit board; the signal output contact is arranged in the shell in a penetrating mode, the outer end of the signal output contact is used for being connected with a signal collector, the inner end of the signal output contact is used for being abutted to the outer wall of the conductive outer copper sleeve, and the signal output contact and the power supply contact are respectively located on two sides of the circuit board fixing ring and used for outputting torque signals generated by a strain area on the transmission shaft.

As another embodiment of this application, be equipped with the mounting groove on the outer copper sheathing of electrically conducting, the casing inside be equipped with the vertical hole that the mounting groove aligns passes in proper order through using the plastics screw the vertical hole with the mounting groove, the plastics screw is used for fixed locking the outer copper sheathing of electrically conducting is arranged in inside the casing.

As another embodiment of the present application, a harness connection member is provided at an upper end of the housing, and a harness connecting the power supply contact and the signal output contact is passed through and led out from the harness connection member.

As another embodiment of this application, the power supply contact with all be equipped with the spring part on the signal output contact, the spring part suit is in on the contact, and be used for the orientation electrically conductive outer copper sheathing elasticity ejection power supply contact with the signal output contact, and make the power supply contact with the signal output contact inner with electrically conductive outer copper sheathing butt.

As another embodiment of this application, be equipped with the shaft shoulder on the transmission shaft, be equipped with the draw-in groove on the copper sheathing in electrically conductive, the shaft shoulder is used for the joint the draw-in groove is fixed copper sheathing in electrically conductive.

As another embodiment of the application, the conductive outer copper sleeve is L-shaped along the axial longitudinal section and is used for surrounding and fixing a plurality of groups of the bearings.

As another embodiment of this application, casing one end is equipped with the opening part is equipped with the jump ring, the jump ring is used for casing opening part joint is fixed the outer end of electrically conductive outer copper sheathing.

As another embodiment of this application, be close to on the electrically conductive outer copper sheathe the tip in casing end hole with be equipped with insulating pad between the shells inner wall, be close to on the electrically conductive outer copper sheathe open-ended tip with also be equipped with insulating pad between the jump ring.

As another embodiment of this application, insulating pad is the L type along axial longitudinal section, and be used for with it is fixed that electrically conductive outer copper sheathing joint, the bearing outer end electrically conductive interior copper sheathing outer end all with insulating pad contactless.

As another embodiment of this application, the transmission shaft middle part is the flute form, the strain region is arranged in and is located the flute form and be equipped with the foil gage, the circuit board is used for responding to the torque signal of foil gage.

The dynamic torque sensor provided by the invention has the beneficial effects that: compared with the prior art, the dynamic torque sensor comprises a shell, a transmission shaft, a circuit board fixing ring, bearings, a conductive inner copper sleeve, a conductive outer copper sleeve, an O-shaped sealing ring, a power supply contact and a signal output contact, wherein the transmission shaft is rotatably arranged in the shell in a penetrating way, the torque of a measured object can be measured through the rotation of the transmission shaft, the transmission shaft can be stably and rotatably supported through a plurality of groups of bearings, the torque measurement sensitivity is improved, a strain area is arranged in the middle of the transmission shaft and can be collected by the circuit board, the strain of the strain area is collected by the circuit board, the torque actually generated by the transmission shaft can be known, the power is supplied to the circuit board through the power supply contact, the measured torque is output to the outside of the shell through the signal output assembly, and compared with the traditional torque sensor, sensitivity is high, and the signal is good, and the operation is reliable and stable, and the time delay is short, and is good through physics fixity ability, connects stably, simple structure, manufacturing cost greatly reduced charges the outage speed faster than carbon brush formula sensor, possesses functions such as precision height, high temperature resistant, resistance to compression simultaneously, and the practicality is stronger.

Drawings

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

Fig. 1 is a schematic structural diagram of an external appearance of a dynamic torque sensor according to an embodiment of the present invention;

fig. 2 is a schematic half-sectional structure diagram of a dynamic torque sensor according to an embodiment of the present invention.

In the figure: 1. a housing; 2. a drive shaft; 3. a circuit board fixing ring; 4. a bearing; 5. a conductive inner copper sleeve; 6. a conductive outer copper sleeve; 7. an O-shaped sealing ring; 8. a power supply contact; 9. a signal output contact; 10. a strained region; 11. a through hole; 12. isolating the magnetic sleeve; 13. mounting holes; 14. a connecting member; 15. mounting grooves; 16. a vertical hole; 17. a plastic screw; 18. a wire harness connector; 19. a spring member; 20. a shaft shoulder; 21. a card slot; 22. a clamp spring; 23. an insulating pad.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 2 together, a dynamic torque sensor provided by the present invention will now be described. The dynamic torque sensor comprises a shell 1, a transmission shaft 2, a circuit board fixing ring 3, a bearing 4, a conductive inner copper sleeve 5, a conductive outer copper sleeve 6, an O-shaped sealing ring 7, a power supply contact 8 and a signal output contact 9.

The shell 1 is hollow, end holes are formed in two ends of the shell, and an opening is formed in the upper end of the shell 1; the transmission shaft 2 is sleeved in the shell 1 in a penetrating mode, penetrates through an end hole at one end and penetrates out of an end hole at the other end, the transmission shaft 2 can rotate in the shell 1, a strain area 10 is arranged in the middle of the transmission shaft 2, and the end portion of the transmission shaft is used for being connected with a torque medium to be measured; the circuit board fixing ring 3 is coaxially sleeved in the middle of the transmission shaft 2 and is not in contact with the transmission shaft 2, a through hole 11 is formed in the circuit board fixing ring 3, the circuit board fixing ring 3 is used for fixedly mounting a circuit board, and the circuit board is used for collecting a torque signal of a strain area 10 on the transmission shaft 2; the bearing 4 is at least two groups, the bearings 4 are coaxially arranged in the shell 1 in parallel, are sleeved on the transmission shaft 2 and are positioned on two sides of the circuit board fixing ring 3, the multiple groups of bearings 4 are coaxially arranged with the end hole and the transmission shaft 2, an isolation magnetic sleeve 12 and conductive grease are arranged at the joint of the multiple groups of bearings 4, the isolation magnetic sleeve 12 is used for enabling the multiple groups of bearings 4 to form a gap, and the conductive grease is used for transmitting electric signals among the multiple groups of bearings 4; the conductive inner copper sleeve 5 is coaxially sleeved on the transmission shaft 2, is positioned inside the plurality of groups of bearings 4, is coaxially arranged with the bearings 4, and is used for supporting the plurality of groups of bearings 4 to rotate, the conductive inner copper sleeve 5 can transmit electric signals, the conductive inner copper sleeve 5 is provided with a mounting hole 13 which is aligned with the through hole 11 on the circuit board fixing ring 3, and the circuit board fixing ring 3 is fixedly connected with the conductive inner copper sleeve 5 by sequentially penetrating through the through hole 11 and the mounting hole 13 through a connecting piece 14; the conductive outer copper sleeve 6 is coaxially sleeved on the plurality of groups of bearings 4, is positioned outside the plurality of groups of bearings 4, is coaxially arranged with the bearings 4, and is used for wrapping the plurality of groups of bearings 4 to rotate, and the conductive outer copper sleeve 6 can transmit electric signals; a plurality of O-shaped sealing rings 7 are uniformly distributed on the inner circumference of the conductive inner copper sleeve 5 and contacted with the outer wall of the transmission shaft 2, and are also uniformly distributed on the outer circumference of the conductive outer copper sleeve 6 and contacted with the inner wall of the shell 1, and the O-shaped sealing rings 7 are sleeved in the annular groove of the conductive inner copper sleeve 5 and the annular groove of the conductive outer copper sleeve 6; the suspension support device is respectively used for suspending and supporting the bearing 4, the shell 1 and the transmission shaft 2, and enabling the suspension support to reach a free state, reducing friction force, improving insulativity and improving sensitivity; the power supply contact 8 is arranged in the shell 1 in a penetrating way, the outer end head is used for connecting a power supply source, and the inner end head is used for being abutted against the outer wall of the conductive outer copper sleeve 6 and supplying power to the circuit board; the signal output contact 9 is arranged in the shell 1 in a penetrating mode, the outer end of the signal output contact is used for being connected with a signal collector, the inner end of the signal output contact is used for being abutted to the outer wall of the conductive outer copper sleeve 6, and the signal output contact 9 and the power supply contact 8 are located on two sides of the circuit board fixing ring 3 respectively and used for outputting torque signals generated by the strain area 10 on the transmission shaft 2.

Compared with the prior art, the dynamic torque sensor comprises a shell 1, a transmission shaft 2, a circuit board fixing ring 3, bearings 4, a conductive inner copper sleeve 5, a conductive outer copper sleeve 6, an O-shaped sealing ring 7, a power supply contact 8 and a signal output contact 9, wherein the transmission shaft 2 is rotatably arranged in the shell 1 in a penetrating manner, the torque of a measured object can be measured through the rotation of the transmission shaft 2, the transmission shaft 2 can be stably and rotatably supported through a plurality of groups of bearings 4, the torque measurement sensitivity is improved, a strain area 10 is arranged in the middle of the transmission shaft 2, the strain area 10 can be a torque strain area 10 and can be collected by a circuit board, the strain of the strain area 10 can be collected by the circuit board, the torque actually generated by the transmission shaft 2 can be known, the power is supplied to the circuit board through the power supply contact 8, the torque is output to the outside of the shell 1 through, can measure the moment of torsion of testee through this dynamic torque sensor, compare with traditional torque sensor, sensitivity is high, and the signal is good, and the operation is reliable and stable, and the time delay is short, and is good through physics fixity ability, connects stably, simple structure, manufacturing cost greatly reduced, and the outage speed of charging is faster than carbon brush formula sensor, possesses functions such as precision height, high temperature resistant, resistance to compression simultaneously, and the practicality is stronger.

The circuit board adopts the circuit board that is used for real-time measurement torsion among the prior art, be equipped with torsion data acquisition unit on the circuit board, it is prior art product, so can directly take in this application, the strain area 10 that sets up on transmission shaft 2 is a strain gage of canning on transmission shaft 2, the real-time torsion that produces on the strain gage of strain area 10 can be gathered to the data acquisition unit on the circuit board, after the strain gage takes place the torsion, can directly gather through the circuit board, and export to the casing 1 outside through signal output contact 9, signal output contact 9 can be connected with display or computer etc. outside casing 1, can be direct real-time observation torsion value on display or computer, be connected to power supply through power supply contact 8 on, can be for the circuit board power supply. The circuit board can adopt a circuit board in the prior art.

The free state mentioned above means: the conductive inner copper bush 5, the conductive outer copper bush 6, the bearing 4, the shell 1 and the transmission shaft 2 are mutually connected stably, the bearing rotates freely and is not restrained, the conductive inner copper bush 5 and the conductive outer copper bush 6 are supported stably, and the bearing 4, the shell 1 and the transmission shaft 2 are in free states. The friction force is reduced, namely when the bearing 4 and the transmission shaft 2 are in a free state, the bearing 4 keeps good coaxiality, the bearing 4 rotates freely, and the friction force is small; adopt insulating cover among the prior art, do not adopt insulating cover in this application, but adopt the good O type sealing washer 7 of insulating properties, can also play fine technological effect simultaneously.

As a specific embodiment of the dynamic torque sensor provided by the present invention, please refer to fig. 1 to 2, an installation groove 15 is formed on the conductive outer copper sleeve 6, a vertical hole 16 aligned with the installation groove 15 is formed inside the housing 1, and a plastic screw 17 is used to fixedly lock the conductive outer copper sleeve 6 inside the housing 1 by sequentially passing through the vertical hole 16 and the installation groove 15.

The conductive outer copper sleeve 6 and the conductive inner copper sleeve 5 cover the plurality of groups of bearings 4, so that the plurality of groups of bearings 4 form a group of bearings 4, and the plurality of groups of bearings 4, the conductive outer copper sleeve 6 and the conductive inner copper sleeve 5 are symmetrically arranged in the axial direction of the transmission shaft 2 by taking the circuit board as the center, so that the rotary support stability of the transmission shaft 2 can be improved.

The number of the bearings 4 in this application is four, and two sets of bearings 4 are provided on the upper left half and the right half of the drive shaft 2, respectively. The more the number of bearings 4 is set, the higher the acquisition sensitivity for torque and the more stable.

Referring to fig. 1 to 2, as an embodiment of the dynamic torque sensor provided by the present invention, a harness connector 18 is disposed at the upper end of the housing 1, and a harness connecting the power supply contact 8 and the signal output contact 9 is led out from the harness connector 18.

The wiring harness is a wire or a line, and a common wiring harness can be selected to pass through the wiring harness connector 18, and in a specific implementation, the wiring harness connector 18 can be fixed on the shell 1 through a plastic screw.

As a specific embodiment of the dynamic torque sensor provided by the present invention, please refer to fig. 1 to 2, the power supply contact 8 and the signal output contact 9 are both provided with a spring member 19, the spring member 19 is sleeved on the contacts and is used for elastically pushing the power supply contact 8 and the signal output contact 9 toward the conductive outer copper sleeve 6, and the inner ends of the power supply contact 8 and the signal output contact 9 are abutted against the conductive outer copper sleeve 6.

As a specific embodiment of the dynamic torque sensor provided by the present invention, please refer to fig. 1 to 2, a shaft shoulder 20 is disposed on the transmission shaft 2, a clamping groove 21 is disposed on the conductive inner copper sleeve 5, and the shaft shoulder 20 is used for clamping the clamping groove 21 and axially fixing the conductive inner copper sleeve 5.

Referring to fig. 1 to 2, as an embodiment of the dynamic torque sensor provided by the present invention, the conductive outer copper sleeve 6 is L-shaped along an axial longitudinal section and is used for surrounding and fixing the plurality of sets of bearings 4.

As a specific embodiment of the dynamic torque sensor provided by the present invention, please refer to fig. 1 to 2, an opening is disposed at one end of the housing 1, a snap spring 22 is disposed at the opening, and the snap spring 22 is used for clamping and fixing the outer end of the conductive outer copper sleeve 6 at the opening of the housing 1.

As a specific embodiment of the dynamic torque sensor provided by the present invention, please refer to fig. 1 to 2, an insulating pad 23 is disposed between an end portion of the conductive outer copper sleeve 6 close to the end hole of the housing 1 and an inner wall of the housing 1, and an insulating pad 23 is also disposed between an end portion of the conductive outer copper sleeve 6 close to the opening and the snap spring 22.

The insulating pad 23 is used for isolating the magnetic field output of the circuit board to the outside of the housing 1, and improves the stability of torque detection. The role and advantage of the insulating pad 23 in this application are: the good insulating effect is guaranteed, support is provided for torque collection or detection, the insulating pad 23 is made of tetrafluoroethylene insulating materials, and the friction performance is good.

Referring to fig. 1 to 2, as a specific embodiment of the dynamic torque sensor provided by the present invention, the insulating pad 23 is L-shaped along the axial longitudinal section, and is used for being clamped and fixed with the conductive outer copper sleeve 6, and the outer end of the bearing 4 and the outer end of the conductive inner copper sleeve 5 are not in contact with the insulating pad 23.

Referring to fig. 1 to 2, as an embodiment of the dynamic torque sensor provided by the present invention, the middle portion of the transmission shaft 2 is in a groove shape, the strain region 10 is disposed in the groove shape and is provided with a strain gauge, and the circuit board is used for sensing a torque signal of the strain gauge.

Be equipped with a plurality of draw-in grooves, screw hole and square groove etc. on current transmission shaft 2 for the connection is adorned to clamping in later stage, but does not set up above structure in this application, but directly adopts an optical axis, is equipped with the recess in the middle part of the optical axis, and sets up to strain area 10, has improved 2 output signal's of transmission shaft stability and accuracy nature so greatly. The dynamic torque sensor of the application is after improving, and output signal's time delay can compete with the same type sensor abroad, and overall dimension can accomplish to be the same with the foreign sensor, and casing 1 is thinnest and transmission shaft 2 is thinnest can all realize, can make the appearance adaptation of sensor changeable simultaneously, and various styles are made into to the size processing as required.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dynamic torque sensor, comprising:

the shell is hollow, end holes are formed in two ends of the shell, and an opening is formed in the upper end of the shell;

the transmission shaft is sleeved in the shell in a penetrating mode, penetrates through the end hole at one end and penetrates out of the end hole at the other end, the transmission shaft can rotate in the shell, a strain area is arranged in the middle of the transmission shaft, and the end portion of the transmission shaft is used for being connected with a measured torque medium;

the circuit board fixing ring is coaxially sleeved in the middle of the transmission shaft and is not in contact with the transmission shaft, a through hole is formed in the circuit board fixing ring, the circuit board fixing ring is used for fixedly mounting a circuit board, and the circuit board is used for collecting a torque signal of a strain area on the transmission shaft;

the bearing is at least two groups, the bearings are coaxially arranged in the shell in parallel, sleeved on the transmission shaft and positioned on two sides of the circuit board fixing ring, a plurality of groups of bearings are coaxially arranged with the end hole and the transmission shaft, an isolation magnetic sleeve and conductive grease are arranged at the joint of the plurality of groups of bearings, the isolation magnetic sleeve is used for enabling the plurality of groups of bearings to form a gap, and the conductive grease is used for transmitting electric signals among the plurality of bearings;

the conductive inner copper sleeve is coaxially sleeved on the transmission shaft, is positioned inside the plurality of groups of bearings, is coaxially arranged with the bearings, and is used for supporting the plurality of groups of bearings to rotate, the conductive inner copper sleeve can transmit electric signals, a mounting hole used for aligning with a through hole on a circuit board fixing ring is formed in the conductive inner copper sleeve, and the circuit board fixing ring is fixedly connected with the conductive inner copper sleeve by sequentially penetrating through the through hole and the mounting hole through a connecting piece;

the conductive outer copper sleeve is coaxially sleeved on the plurality of groups of bearings, is positioned outside the plurality of groups of bearings, is coaxially arranged with the bearings, is used for wrapping the plurality of groups of bearings to rotate, and can transmit electric signals;

a plurality of O-shaped sealing rings are uniformly distributed on the inner circumference of the conductive inner copper sleeve and contacted with the outer wall of the transmission shaft, and are also uniformly distributed on the outer circumference of the conductive outer copper sleeve and contacted with the inner wall of the shell, and the O-shaped sealing rings are respectively used for suspending and supporting the bearing, the shell and the transmission shaft, and achieving a free state, reducing friction force, improving insulativity and improving sensitivity;

the power supply contact is arranged in the shell in a penetrating manner, the outer end of the power supply contact is used for being connected with a power supply source, and the inner end of the power supply contact is used for being abutted against the outer wall of the conductive outer copper sleeve and used for supplying power to the circuit board;

and the signal output contact is arranged in the shell in a penetrating manner, the outer end of the signal output contact is used for connecting a signal collector, the inner end of the signal output contact is used for being abutted against the outer wall of the conductive outer copper sleeve, and the signal output contact and the power supply contact are respectively positioned on two sides of the circuit board fixing ring and are used for outputting a torque signal generated by a strain area on the transmission shaft.

2. The dynamic torque transducer according to claim 1, wherein the conductive outer copper sleeve has a mounting slot formed therein, and the housing has a vertical hole formed therein aligned with the mounting slot, the vertical hole and the mounting slot being sequentially penetrated by a plastic screw for fixedly locking the conductive outer copper sleeve inside the housing.

3. The dynamic torque transducer according to claim 1, wherein a harness connector is provided at an upper end of the housing, and a harness connecting the power supply contact and the signal output contact is passed through and led out from the harness connector.

4. The dynamic torque transducer of claim 1, wherein the power supply contact and the signal output contact each have a spring member disposed thereon, the spring member being disposed around the contacts and adapted to resiliently urge the power supply contact and the signal output contact toward the outer conductive copper sleeve and to cause inner ends of the power supply contact and the signal output contact to abut the outer conductive copper sleeve.

5. The dynamic torque sensor as claimed in claim 1, wherein a shoulder is disposed on the transmission shaft, and a slot is disposed on the conductive inner copper sleeve, and the shoulder is used for engaging with the slot and fixing the conductive inner copper sleeve.

6. The dynamic torque transducer of claim 1, wherein the conductive outer copper jacket is L-shaped in axial longitudinal cross-section and is adapted to surround and secure a plurality of sets of the bearings.

7. The dynamic torque sensor as claimed in claim 6, wherein an opening is formed at one end of the housing, a clamp spring is arranged at the opening, and the clamp spring is used for clamping and fixing the outer end of the conductive outer copper sleeve at the opening of the housing.

8. The dynamic torque transducer of claim 7, wherein an insulating pad is disposed between an end of the conductive outer copper sleeve near the housing end hole and the inner wall of the housing, and an insulating pad is also disposed between an end of the conductive outer copper sleeve near the opening and the clamp spring.

9. The dynamic torque transducer according to claim 8, wherein the insulating pad is L-shaped along an axial longitudinal section and is adapted to be fixed to the conductive outer copper sleeve in a snap fit manner, and the outer end of the bearing and the outer end of the conductive inner copper sleeve are not in contact with the insulating pad.

10. The dynamic torque transducer of claim 1, wherein the transmission shaft has a recessed middle portion, the strain region is disposed in the recessed middle portion and has a strain gauge, and the circuit board is configured to sense a torque signal of the strain gauge.