CN115855337B

CN115855337B - Motor axial torque detection device and detection method thereof

Info

Publication number: CN115855337B
Application number: CN202310126061.1A
Authority: CN
Inventors: 于威; 于娟
Original assignee: Shenzhen Iridium Cheng Electromechanical Equipment Co ltd
Current assignee: Shenzhen Iridium Cheng Electromechanical Equipment Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-05-02
Anticipated expiration: 2043-02-17
Also published as: CN115855337A

Abstract

The invention discloses a motor axial torque detection device and a detection method thereof, and relates to the field of motor shaft detection. According to the invention, after the motor shaft is detected, the conveyor belt is started to drive the movable frame to move, the movable frame drives the heating sleeve to move, and the position between the movable frame and the motor shaft is changed, so that all parts of the motor shaft can be detected.

Description

Motor axial torque detection device and detection method thereof

Technical Field

The invention relates to the field of motor shaft detection, in particular to a motor axial torque detection device and a motor axial torque detection method.

Background

The motor is an electromagnetic device for converting or transmitting electric energy according to the law of electromagnetic induction, and the motor usually adopts a motor shaft to output torque externally, so that the motor shaft can bear larger force when the motor is used, and the bearing limit of the axial force of the motor torque needs to be detected for the safety of the motor when the motor is used, and therefore a torque detection device is needed for detecting the motor shaft.

However, the use environment of the existing motor is complex, the temperature of the motor running is greatly changed under different conditions, the existing motor shaft detection device is usually kept at a room temperature when detecting, and the motor shafts under different conditions are difficult to detect, and secondly, the sizes of the existing motors are different, so that the specifications of the motor shafts inside the existing motors are greatly different, and in the detection process of the longer motor shafts, the force applied to the end parts of the motor shafts can be usually detected, the detection of each position of the motor shafts cannot be accurately carried out, and the detection effect is poor.

Disclosure of Invention

Based on the above, the invention aims to provide a motor axial torque detection device and a motor axial torque detection method, so as to solve the technical problems that motor shafts with different temperatures cannot be detected and the detection range of the motor shafts is smaller.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a motor axial torque detection device, includes the detection platform, the driving motor is installed to the top of detection platform, and driving motor's output is connected with and adds the frame of holding, the top swing joint of detection platform has the carriage, is provided with the motor shaft between driving motor and the carriage, the end connection of carriage has the heating jacket, the internally mounted of heating jacket has solid fixed ring, and gu the side of fixed ring is located the motor shaft outside and is connected with multiunit iron rod, and the coil has been cup jointed in the outside of every group iron rod, and the coil extends to the internal connection of heating jacket has the control electric ring, the control electric ring provides different electric current to the coil and makes the iron rod produce different magnetism, the end connection of iron rod has the heating plate that extends to the motor shaft outside, the internal connection of carriage has the ring that reduces the speed, and the internal connection of ring has multiunit limiting splint, and every group limiting splint all are connected with the iron rod transmission through drive mechanism, and the supporting network has been seted up respectively to the top and the bottom of carriage, and the external air current enters into the carriage inside through the air inlet to the motor shaft through the supporting network to the internal cooling of the motor shaft.

Through adopting above-mentioned technical scheme, can conveniently heat the motor shaft through the coil, later produce stable magnetism through the coil lets in the direct current and promote drive mechanism and remove to make spacing splint hold the motor shaft, in the testing process, cool down the motor shaft through external air current, thereby detect the motor shaft under the different temperatures, improved detection range.

The invention is further characterized in that the top end of the detection table is connected with a plurality of groups of sliding grooves, a conveyor belt is arranged in the detection table, the top end of the conveyor belt is connected with a fixing frame, and the bottom end of the movable frame passes through the sliding grooves to be connected with the fixing frame in a clamping manner.

Through adopting above-mentioned technical scheme, can conveniently drive the movable frame and remove.

The invention is further arranged that the top end of the conveyor belt is connected with the fan, a group of sliding grooves are positioned between the air inlet and the fan, and air flow generated by the fan enters the moving frame along the sliding grooves to radiate heat of the motor shaft.

Through adopting above-mentioned technical scheme, can make the fan dispel the heat to remove the inside of frame, and when removing the frame and remove, make the fan along with removing the frame synchronous motion.

The invention is further arranged that a torque sensor is connected between the clamping frame and the output end of the driving motor, a lock rod and an extrusion clamping block are arranged in the clamping frame, the lock rod is connected with the clamping frame through threads, and the lock rod pushes the extrusion clamping block to move in the clamping frame to clamp and lock a motor shaft.

By adopting the technical scheme, the torque of the motor shaft during rotation can be conveniently detected.

The invention is further characterized in that the inside of the movable frame is connected with a clamping ring, the speed reducing ring is in limit connection with the clamping ring, a plurality of groups of balls are arranged on two sides of the clamping ring, a limit ring is arranged on the outer wall of the speed reducing ring, and the speed reducing ring is in rolling connection with the balls through the limit ring.

Through adopting above-mentioned technical scheme, can carry out spacingly to the reduction ring, reduce the rocking of speed reduction ring.

The invention is further characterized in that driving cylinders are symmetrically arranged on the inner wall of the clamping ring, the output end of each driving cylinder is connected with a clamping block, the clamping blocks are aligned with the supporting net on the outer side of the speed reducing ring, and anti-skid patterns are formed on the inner wall of each clamping block.

Through adopting above-mentioned technical scheme, can improve the resistance of reducing ring through the clamp splice, change the load that the reducing ring applyed the motor shaft, improve detection range.

The invention further provides that the transmission mechanism between the limiting clamp plate and the iron rod is a push plate, one side of the push plate, which is close to the iron rod, is connected with a magnetic ring, one side of the push plate, which is close to the speed reduction ring, is connected with a plurality of groups of inserting rods, each group of inserting rods extends to the inside of the speed reduction ring and is distributed on the side surface of the limiting clamp plate, the inserting rods are movably connected with the speed reduction ring through springs, the outer sides of the inserting rods are connected with extrusion plates, the side surface of the limiting clamp plate is connected with inclined surfaces matched with the extrusion plates, and the magnetic ring pushes the limiting clamp plate to move through the inclined surfaces.

Through adopting above-mentioned technical scheme, the steady magnetism that produces the coil promotes the push pedal, makes the push pedal remove and promotes spacing splint through the stripper plate and carry out spacingly to the motor shaft.

The invention is further provided that the inner wall of each group of limiting clamping plates is connected with a ripple clamp, the limiting clamping plates are fixedly connected with the motor shaft through the ripple clamps, the limiting plates are arranged on two sides of each limiting clamping plate, and the limiting clamping plates are in limiting connection with the speed reducing ring through the limiting plates.

Through adopting above-mentioned technical scheme, make things convenient for spacing splint to add to hold spacing to the motor shaft.

A motor axial torque detection method comprising the steps of:

step one: firstly, a motor shaft is installed in a holding frame, a lock rod is rotated to extrude and limit the motor shaft, so that the motor shaft can synchronously rotate along with the holding frame, then a conveyor belt is started, the conveyor belt drives a movable frame to move, the end part of the motor shaft is sleeved into the movable frame and the heating sleeve, and the conveyor belt is closed, so that the movable frame is fixedly limited;

step two: the electric rings are controlled to provide alternating current for a plurality of groups of coils, the coils generate a changing magnetic field to heat the interior of the iron rod, the iron rod is heated and transmitted into the heating sleeve through the heating sheet, and the end part of the motor shaft is heated;

step three: after the temperature of the motor shaft reaches a proper temperature, the control electric ring is cut off to supply alternating current to the coils, and the control electric ring is used for supplying direct current to a plurality of groups of coils, at the moment, the iron rod forms magnetism under a stable magnetic field, the magnetism is opposite to that of a magnetic ring at the end part of the push plate, so that the push plate is pushed to be close to the outer side of the speed reduction ring, the push plate pushes the inserted rod to be inserted into the speed reduction ring, and the extrusion plate at the side surface of the inserted rod pushes the limiting clamp plate, so that the limiting clamp plate clamps and limits the motor shaft, and the motor shaft is clamped with the speed reduction ring;

step four: starting a plurality of groups of driving cylinders, and driving the cylinders to push the clamping blocks to clamp the outer sides of the speed reduction rings so as to apply resistance to the speed reduction rings;

step five: starting a driving motor, wherein the output end of the driving motor drives a torque sensor and an adding and holding frame to synchronously rotate, the adding and holding frame drives a motor shaft to rotate at the moment, the end part of the motor shaft is decelerated through a deceleration ring, and the torque of the motor shaft rotating is checked according to the torque sensor;

step six: a fan on the conveyor belt is started, the fan sends external cold air into the movable frame through the air inlet, air flow enters into the speed reducing ring through the supporting net, the position where the motor shaft is held is cooled, and therefore the motor shaft can be cooled rapidly, and hot air flow is discharged through the air outlet;

step seven: after the detection is finished, the direct current to the plurality of groups of coils is cut off, the magnetization of the iron rod is eliminated, the push plate and the inserting rod return under the action of the spring, the extrusion plate does not limit the limiting clamping plate any more, the limit to the motor shaft is relieved, then the conveyor belt is started, the conveyor belt drives the movable frame to move forwards, the positions of the heating sleeve and the motor shaft are changed, and therefore other positions of the motor shaft are heated and torque detection is carried out.

In summary, the invention has the following advantages:

1. according to the invention, when the motor shaft is detected, the movable frame is driven to move through the conveyor belt, the connection position of the motor shaft and the movable frame is changed, meanwhile, alternating current is increased through the control electric ring to the coil, the iron rod is heated under the alternating current magnetic field, the iron rod heats the motor shaft through the heating plate, after the heating is finished, the motor shaft is limited through the speed reducing ring, the driving motor is started to detect the torque of the motor shaft, the fan is started while the detection is carried out, the fan sends outside air into the movable frame to cool the heated position of the motor shaft, and meanwhile, the torque detection is carried out, so that the torque detection of the motor shaft at different temperatures is carried out, and the problem that the motor shaft at different temperatures cannot be detected is effectively solved.

2. According to the invention, after the motor shaft is detected, the conveyor belt is started to drive the movable frame to move, and the movable frame drives the heating sleeve to move, so that the positions between the movable frame and the motor shaft are changed, and therefore, all parts of the motor shaft can be detected, the detection range of the motor shaft is improved, and the problem that the detection range of the motor shaft is smaller is effectively solved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of a clamping frame according to the present invention;

FIG. 4 is a schematic view of the internal structure of the mobile frame according to the present invention;

FIG. 5 is a schematic view of the internal structure of the heating jacket of the present invention;

FIG. 6 is a schematic view of a heating iron rod according to the present invention;

FIG. 7 is a schematic diagram showing a structure of a locking mechanism of a speed reducing ring and a motor shaft according to the present invention;

FIG. 8 is a schematic view of a limiting clamp plate according to the present invention;

FIG. 9 is a schematic view showing the internal structure of the mobile frame according to the present invention;

FIG. 10 is a schematic view of the structure of the conveyor belt inside the inspection station according to the present invention.

In the figure: 1. a detection table; 101. a chute; 2. a driving motor; 201. a holding rack; 202. a torque sensor; 203. a lock lever; 204. extruding the clamping blocks; 3. a moving rack; 301. a clamping ring; 302. a driving cylinder; 303. clamping blocks; 304. an exhaust port; 305. an air inlet; 4. a heating jacket; 5. a control electric loop; 6. a fixing ring; 601. an iron rod; 602. a coil; 603. a heating sheet; 7. a speed reducing ring; 701. a limiting ring; 702. a support net; 8. a push plate; 801. a rod; 802. a magnetic ring; 803. an extrusion plate; 9. a conveyor belt; 901. a fixing frame; 10. a fan; 1001. a conductive rod; 11. limiting clamping plates; 1101. a corrugated clip; 1102. and a limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.

The utility model provides a motor axial torque detection device, as shown in fig. 1 through 10, including detecting platform 1, detecting platform 1's top installs driving motor 2, driving motor 2's output is connected with and adds and hold the frame 201, detecting platform 1's top is connected with multiunit spout 101, detecting platform 1's internally mounted has conveyer belt 9, conveyer belt 9's top is connected with mount 901, the bottom of movable frame 3 passes spout 101 and is connected with mount 901 block, driving motor 2 and movable frame 3 are provided with the motor shaft, after fixing the motor shaft, start conveyer belt 9 drive movable frame 3 and remove the motor shaft outside, movable frame 3's end connection has heating jacket 4, heating jacket 4's internally mounted has solid fixed ring 6, and gu the side of fixed ring 6 is located the motor shaft outside and is connected with multiunit iron rod 601, coil 602 has been cup jointed in the outside of every group iron rod 601, coil 602 extends to heating jacket 4's internally connected with control electric ring 5, control electric ring 5 provides different electric current to coil 602 and makes iron rod 601 produce different magnetism, iron rod 601's end connection has the heating plate 603 to extend to the motor shaft outside, be provided with the motor shaft 603, change the temperature to the electric motor shaft 602 through control electric ring 602, thereby change the temperature to the motor shaft, thereby change the heating field 601, thereby change the motor shaft is heated.

The inside of the movable frame 3 is connected with a speed reducing ring 7, the inside of the speed reducing ring 7 is connected with a plurality of groups of limiting clamping plates 11, each group of limiting clamping plates 11 is in transmission connection with an iron rod 601 through a transmission mechanism, the transmission mechanism between each limiting clamping plate 11 and the iron rod 601 is a push plate 8, one side of the push plate 8, which is close to the iron rod 601, is connected with a plurality of groups of inserting rods 801, one side of the push plate 8, which is close to the speed reducing ring 7, is connected with a plurality of groups of inserting rods 801, the inside of the speed reducing ring 7 is distributed on the side face of the limiting clamping plates 11, the inserting rods 801 are movably connected with the speed reducing ring 7 through springs, the outer side of the inserting rods 801 are connected with extrusion plates 803, the side face of the limiting clamping plates 11 is connected with inclined faces matched with the extrusion plates 803, the magnetic rings 802 push the limiting clamping plates 11 to move through the inclined faces, after the motor shaft temperature reaches a proper temperature, the control electric ring 5 provides alternating current for the coils 602, and the electric ring 5 provides direct current for the plurality of coils 602, at the moment, the iron rod 601 forms magnetism under a stable magnetic field, the magnetism is opposite to that the magnetism of the magnetic rings 802 at the end of the push plate 8, thereby pushing the push plate 8 is close to the outer side of the speed reducing ring 7, the push plate 8 pushes the inserting rods 801 to the magnetic rings 801, and the side of the motor shaft 801 is inserted into the side of the limiting plates 7, and the limiting plates 803 are pushed into the limiting plates 803, and clamped by the limiting plates 803.

The supporting network 702 is arranged on the outer side of the speed reducing ring 7, the top end and the bottom end of the movable frame 3 are respectively provided with the air inlet 305 and the air outlet 304, the top end of the conveyor belt 9 is connected with the fan 10, a group of sliding grooves 101 are arranged between the air inlet 305 and the fan 10, and air flow generated by the fan 10 enters the movable frame 3 along the sliding grooves 101 to radiate heat of a motor shaft, so that the motor shaft at different temperatures can be conveniently inspected.

Referring to fig. 1 and 2, a torque sensor 202 is connected between a holding frame 201 and an output end of a driving motor 2, a lock rod 203 and an extrusion clamping block 204 are installed in the holding frame 201, the lock rod 203 is connected with the holding frame 201 through threads, the lock rod 203 pushes the extrusion clamping block 204 to move in the holding frame 201 to clamp and lock a motor shaft, the motor shaft can be conveniently limited, and torque generated when the motor shaft rotates is detected through the torque sensor 202.

Referring to fig. 4, a clamping ring 301 is connected to the inner portion of the moving frame 3, a decelerating ring 7 is in limiting connection with the clamping ring 301, a plurality of groups of balls are arranged on two sides of the clamping ring 301, a limiting ring 701 is arranged on the outer wall of the decelerating ring 7, the decelerating ring 7 is in rolling connection with the balls through the limiting ring 701, a driving cylinder 302 is symmetrically arranged on the inner wall of the clamping ring 301, a clamping block 303 is connected to the output end of the driving cylinder 302, the clamping block 303 is aligned with a supporting net 702 on the outer side of the decelerating ring 7, anti-skid patterns are arranged on the inner wall of the clamping block 303, the decelerating ring 7 is conveniently limited, the decelerating ring 7 is prevented from shifting during operation, resistance can be applied to the decelerating ring 7 through the driving cylinder 302 and the clamping block 303, and accordingly the load of a motor shaft is changed.

Referring to fig. 8, the inner walls of each group of limiting clamping plates 11 are connected with a corrugated clamp 1101, the limiting clamping plates 11 are fixedly connected with a motor shaft through the corrugated clamps 1101, limiting plates 1102 are arranged on two sides of the limiting clamping plates 11, the limiting clamping plates 11 are in limiting connection with the speed reducing ring 7 through the limiting plates 1102, the motor shaft is conveniently limited by the limiting clamping plates 11, and the limiting clamping plates 11 are fixedly limited through the limiting plates 1102.

Referring to fig. 1 to 10, a method for detecting axial torque of a motor includes: firstly, a motor shaft is installed in a holding frame, a lock rod is rotated to extrude and limit the motor shaft, so that the motor shaft can synchronously rotate along with the holding frame, then a conveyor belt is started, the conveyor belt drives a movable frame to move, the end part of the motor shaft is sleeved into the movable frame and the heating sleeve, and the conveyor belt is closed, so that the movable frame is fixedly limited;

The working principle of the invention is as follows: when the motor shaft is detected, firstly, the motor shaft is installed in the holding frame 201, the locking rod 203 is rotated to extrude and limit the motor shaft, so that the motor shaft can synchronously rotate along with the holding frame 201, then the conveyor belt 9 is started, the conveyor belt 9 drives the moving frame 3 to move, the end part of the motor shaft is sleeved into the moving frame 3 and the heating sleeve 4, the conveyor belt 9 is closed, the moving frame 3 is fixedly limited, then the plurality of groups of coils 602 are provided with alternating current through the control electric ring 5, the coils 602 generate a changed magnetic field to heat the interior of the iron rod 601, the iron rod 601 is heated and is transmitted into the heating sleeve 4 through the heating plate 603, the end part of the motor shaft is heated, after the temperature of the motor shaft reaches a proper temperature, the control electric ring 5 is cut off to provide alternating current for the coils 602, and the control electric ring 5 is used for providing direct current for the plurality of groups of coils 602, at the moment, the iron rod 601 forms magnetism under a stable magnetic field, the magnetism is opposite to that of a magnetic ring 802 at the end part of a push plate 8, so that the push plate 8 is pushed to be close to the outer side of a speed reducing ring 7, a push plate 8 pushes a plug rod 801 to be inserted into the speed reducing ring 7, a pressing plate 803 at the side surface of the plug rod 801 pushes a limiting clamping plate 11 to clamp and limit a motor shaft, the motor shaft is clamped with the speed reducing ring 7, then a plurality of groups of driving cylinders 302 are started, the driving cylinders 302 push a clamping block 303 to be clamped at the outer side of the speed reducing ring 7, resistance is applied to the speed reducing ring 7, then a driving motor 2 is started, the output end of the driving motor 2 drives a torque sensor 202 and an acceleration frame 201 to synchronously rotate, at the moment, the end part of the motor shaft drives the motor shaft to rotate through the speed reducing ring 7, the torque sensor 202 is used for checking the rotating torque of the motor shaft, at the moment, the torsion position of the motor shaft is heated through a plurality of groups of iron bars 601, the heating temperature can be adjusted according to requirements, so that torque detection can be performed on motor shafts at different temperatures, the detection effect is improved, after the position detection is finished, direct current power to a plurality of groups of coils 602 is cut off, iron bars are magnetized and eliminated, a push plate 8 and an inserting rod 801 return under the action of a spring, a limiting clamp plate 11 is not limited by a pressing plate 803 any more, the motor shaft is relieved, a conveyor belt 9 is started, the conveyor belt 9 drives a movable frame 3 to move forwards, the positions of a heating sleeve 4 and the motor shaft are changed, the other positions of the motor shaft are heated, torque detection is performed, and the detection effect is improved;

and when removing frame 3 and remove, start fan 10 on the conveyer belt 9, in fan 10 sends into the removal frame 3 with external cold air through air inlet 305, the air current enters into in the ring 7 that slows down through supporting network 702, the position that holds the motor shaft adds, thereby can carry out quick cooling to the motor shaft, the hot air flow is discharged through gas vent 304, change the temperature of motor shaft, thereby the convenience is inspected the motor shaft under different temperatures, improve the detection effect, and the cooling can make things convenient for the motor shaft to take out at the back, improve the loading and unloading speed of motor shaft.

Although embodiments of the invention have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the invention as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the invention, provided that such modifications are within the scope of the appended claims.

Claims

1. The utility model provides a motor axial torque detection device, includes detection platform (1), driving motor (2) are installed to the top of detection platform (1), and the output of driving motor (2) is connected with and adds holds frame (201), the top swing joint of detection platform (1) has movable frame (3), is provided with the motor shaft between driving motor (2) and movable frame (3), its characterized in that: the end connection who removes frame (3) has heating jacket (4), the internally mounted of heating jacket (4) has solid fixed ring (6), and the side of solid fixed ring (6) is located the motor shaft outside and is connected with multiunit iron rod (601), and coil (602) have been cup jointed in the outside of every group iron rod (601), and coil (602) extend to the internal connection of heating jacket (4) have control electric ring (5), control electric ring (5) provide different electric currents to coil (602) and make iron rod (601) produce different magnetism, the end connection of iron rod (601) has heating plate (603) that extend to the motor shaft outside, the internal connection of removing frame (3) has retarding ring (7), and the internal connection of retarding ring (7) has multiunit limiting clamp plate (11), and every group limiting clamp plate (11) all are connected with iron rod (601) transmission through drive mechanism, and supporting network (702) have been seted up in the outside of retarding ring (7), and air inlet (305) and gas vent (304) have been seted up respectively to the top and bottom of removing frame (3) to coil (602), and air current gets into through motor shaft (305) and get into the air inlet (305) and get into inside to internal cooling down to supporting network (702).

2. The motor axial torque detection device according to claim 1, wherein: the top of detecting platform (1) is connected with multiunit spout (101), the internally mounted of detecting platform (1) has conveyer belt (9), the top of conveyer belt (9) is connected with mount (901), the bottom of moving frame (3) passes spout (101) and mount (901) block connection.

3. The motor axial torque detecting apparatus according to claim 2, wherein: the top end of the conveyor belt (9) is connected with a fan (10), a group of sliding grooves (101) are arranged between the air inlet (305) and the fan (10), and air flow generated by the fan (10) enters into the movable frame (3) along the sliding grooves (101) to dissipate heat of a motor shaft.

4. A motor axial torque detecting apparatus according to claim 3, wherein: a torque sensor (202) is connected between the clamping frame (201) and the output end of the driving motor (2), a lock rod (203) and an extrusion clamping block (204) are arranged in the clamping frame (201), the lock rod (203) is connected with the clamping frame (201) through threads, and the lock rod (203) pushes the extrusion clamping block (204) to move in the clamping frame (201) so as to clamp and lock a motor shaft.

5. The motor axial torque detecting apparatus according to claim 4, wherein: the inside of movable frame (3) is connected with clamp ring (301), speed reduction ring (7) is connected with clamp ring (301) in a limiting way, and the both sides of clamp ring (301) have all been seted up multiunit ball, and spacing ring (701) have been seted up to the outer wall of speed reduction ring (7), and speed reduction ring (7) are connected with the ball is rolling through spacing ring (701).

6. The motor axial torque detecting apparatus according to claim 5, wherein: the inner wall symmetry of clamp ring (301) is installed and is driven cylinder (302), the output of drive cylinder (302) is connected with clamp splice (303), and clamp splice (303) aligns with support net (702) in the speed reduction ring (7) outside, and the anti-skidding line has been seted up to the inner wall of clamp splice (303).

7. The motor axial torque detecting apparatus according to claim 6, wherein: the driving mechanism between the limiting clamp plate (11) and the iron rod (601) is a push plate (8), one side of the push plate (8) close to the iron rod (601) is connected with a magnetic ring (802), one side of the push plate (8) close to the speed reducing ring (7) is connected with a plurality of groups of inserting rods (801), each group of inserting rods (801) extends to the inner side of the speed reducing ring (7) and is distributed on the side face of the limiting clamp plate (11), the inserting rods (801) are movably connected with the speed reducing ring (7) through springs, the outer side of the inserting rods (801) is connected with an extrusion plate (803), the side face of the limiting clamp plate (11) is connected with an inclined face matched with the extrusion plate (803), and the magnetic ring (802) pushes the limiting clamp plate (11) to move through the inclined face.

8. The motor axial torque detecting apparatus according to claim 7, wherein: every group the inner wall of limiting clamp plate (11) all is connected with ripple clamp (1101), limiting clamp plate (11) pass through ripple clamp (1101) and motor shaft fixed connection, limiting plate (1102) have been seted up to both sides of limiting clamp plate (11), limiting clamp plate (11) pass through limiting plate (1102) and are connected with speed reduction ring (7) spacing.

9. A motor axial torque detection method characterized by comprising a motor axial torque detection apparatus as claimed in claim 8, comprising the steps of: