Motor torque and speed on-line monitoring device and motor

Abstract

The embodiment of the application belongs to the technical field of detection equipment, and particularly relates to a motor torque and rotating speed online monitoring device and a motor. The embodiment of the application aims to solve the technical problem that the existing motor torque and rotating speed online monitoring device has a large installation space due to a too long axial length. The motor torque and rotating speed online monitoring device provided by the embodiment of the application comprises a shell, a shaft sleeve and a detector. The shell surrounds a shaft hole, the shaft sleeve is arranged in the shaft hole, one end of the shell along the center line direction of the shaft hole is used for being connected with a driving device, the shaft sleeve is used for being sleeved on a main shaft of the driving device, the shaft sleeve and the main shaft are in transmission connection, and one end of the shaft sleeve, which is away from the driving device, is used for being connected with an input shaft of a load. The shell is fixedly connected with the driving device, and the shaft sleeve is sleeved on the main shaft, so that part of the main shaft can be arranged in the shell, the distance between the driving device and the shell is shortened, the distance between the driving device and the load is further reduced, and the space occupied by the whole power system is reduced.

Description

Technical Field

[0001] This application belongs to the field of detection equipment technology, specifically relating to an online monitoring device for motor torque and speed and a motor. Background Technology

[0002] Electric motors, as power sources, are widely used in various industries, such as mining machinery, railway machinery, and oil extraction. The motor's spindle is connected to the load's input shaft so that when the motor is working, it drives the input shaft to rotate, thereby driving the load. To monitor the operation of the load or motor, it is often necessary to measure the output torque of the motor's spindle.

[0003] In related technologies, a detection device is typically installed between the main shaft of the motor and the input shaft of the load to detect the output torque of the main shaft. Specifically, the detection device includes a housing, a detector, a first connecting shaft connected to one end of the detector, and a second connecting shaft connected to the other end of the detector. The axes of the first and second connecting shafts are collinear. The first connecting shaft is connected to the main shaft of the motor via a coupling, and the second connecting shaft is connected to the input shaft of the load via a coupling. When the main shaft rotates, the detection device drives the input shaft to rotate, thereby driving the load to work. During this process, the detector can detect the output torque of the main shaft.

[0004] However, the detection device is connected to the motor and the load respectively via a coupling, which results in a large distance between the motor and the load and occupies a large space. Summary of the Invention

[0005] The main objective of this application is to provide an online monitoring device for motor torque and speed, as well as a motor, to solve the technical problem of excessive axial length.

[0006] On the one hand, to achieve the above objectives, the online monitoring device for motor torque and speed provided in this application includes a housing, a bushing, and a detector. The housing forms a shaft hole, the bushing passes through the shaft hole, and the center line of the bushing is parallel to the center line of the shaft hole. One end of the housing along the center line of the shaft hole is used to connect to a drive device, the bushing is used to be sleeved on the main shaft of the drive device, and the bushing and the main shaft are connected by transmission. The end of the bushing away from the drive device is used to connect to the input shaft of the load. The detector is disposed between the bushing and the housing, and the detector is used to detect the output data of the main shaft.

[0007] There is a safety gap between the outer wall of the bushing and the wall of the shaft hole.

[0008] The bushing is connected to the main shaft via a key drive.

[0009] The detector comprises a power supply device, a strain body, a data transmission device and a processing circuit, the strain body and the processing circuit are arranged on the shaft sleeve, and the strain body is electrically connected with the processing circuit; the power supply device and the data transmission device are arranged between the shaft sleeve and the shell, and the power supply device and the data transmission device are electrically connected with the processing circuit.

[0010] The strain body is used for detecting the deformation amount of the shaft sleeve, the processing circuit is used for obtaining the torque data of the main shaft according to the deformation amount, and the torque is sent to an external device through the data transmission device.

[0011] The power supply device comprises a first power supply coil and a second power supply coil, the first power supply coil is arranged on the shaft sleeve, and the first power supply coil is electrically connected with the processing circuit; the second power supply coil is arranged on the shell, and the second power supply coil corresponds to the first power supply coil.

[0012] The data transmission device comprises a first data coil and a second data coil, the first data coil is arranged on the shaft sleeve, and the first data coil is electrically connected with the processing circuit; the second data coil is arranged on the shell, and the second data coil corresponds to the first data coil.

[0013] The first data coil and the first power supply coil are arranged in the direction of the center line of the shaft sleeve, the strain body is located between the first power supply coil and the first data coil, and the strain body is attached to the outer wall of the shaft sleeve.

[0014] The shaft sleeve comprises a sleeve body and a column body arranged at the end of the sleeve body away from the driving device, the column body is provided with a connecting portion at the end away from the driving device, the first power supply coil is sleeved on the sleeve body, the strain body is arranged on the column body, the first power supply coil is arranged on the connecting portion, and the processing circuit is arranged at the end of the connecting portion away from the driving device; the connecting portion is used for driving connection with the input shaft.

[0015] The end of the connecting portion away from the driving device is provided with a containing groove, and the processing circuit is arranged in the containing groove.

[0016] In another aspect, an electric motor comprises an electric motor housing and the electric motor torque and speed online monitoring device in any one of the embodiments, and the shell of the electric motor torque and speed online monitoring device is connected with the electric motor housing.

[0017] The electric motor torque and rotating speed online monitoring device provided by the embodiment of the application comprises a shell, a shaft sleeve and a detector, the shell surrounds a shaft hole, the shaft sleeve is arranged in the shaft hole, one end of the shell along the center line direction of the shaft hole is used for being connected with a driving device, the shaft sleeve is used for being sleeved on a main shaft of the driving device, and the shaft sleeve is in transmission connection with the main shaft, and one end of the shaft sleeve away from the driving device is used for being connected with an input shaft of a load. The shell is fixedly connected with the driving device, the shaft sleeve is sleeved on the main shaft, so that part of the main shaft can be arranged in the shell; compared with the first connecting shaft in the shell and the main shaft being connected through a shaft coupling, the distance between the driving device and the shell is shortened, and then the distance between the driving device and the load is reduced, and the space occupied by the whole power system is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the related art. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0019] Figure 1 The shaft side sectional view of the electric motor torque and rotating speed online monitoring device provided by the embodiment of the application;

[0020] Figure 2 The front sectional view of the electric motor torque and rotating speed online monitoring device provided by the embodiment of the application;

[0021] Figure 3 The sectional view of the middle shell; Figure 1

[0022] The sectional view of the middle shaft sleeve; Figure 4 Figure 1 The sectional view of the electric motor torque and rotating speed online monitoring device provided by the embodiment of the application;

[0023] Figure 5 The schematic diagram of the electric motor provided by the embodiment of the application.

[0024] Figure 6 Explanation of reference signs:

[0025] 10-shell; 130-shaft hole;

[0026] 10-shell; 130-shaft hole;

[0027] 110-first flange; 20-shaft sleeve;

[0028] 120-positioning hole; 210-sleeve body; ​

[0029] 211 - first keyway; 322 - second power supply coil;

[0030] 212 - first wiring hole; 330 - data transmission device;

[0031] 213 - second wiring hole; 331 - first data coil;

[0032] 220 - column; 332 - second data coil;

[0033] 221 - process hole; 340 - processing circuit;

[0034] 230 - connecting part; 341 - cover plate;

[0035] 231 - accommodating groove; 350 - junction box;

[0036] 232 - second flange; 361 - detection disc;

[0037] 233 - third wiring hole; 40 - motor;

[0038] 234 - fourth wiring hole; 420 - main shaft;

[0039] 310 - strain body; 50 - load;

[0040] 320 - power supply device; 510 - third flange;

[0041] 321 - first power supply coil; 60 - flat key.

[0042] Through the above drawings, the specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] In the related art, the detection device comprises a shell and a rotating shaft penetrating through the shell, the shell is externally provided with a support fixed to the ground, the support is used for supporting the detection device, the shell is internally provided with a bearing, the bearing is used for supporting the rotating shaft, one end of the rotating shaft is provided with a first connecting shaft, the other end of the rotating shaft is provided with a second connecting shaft, the first connecting shaft is connected with a main shaft of a motor through a shaft coupling, and the second connecting shaft is connected with a load through a shaft coupling. A plurality of strain bodies are installed on the rotating shaft, the strain bodies form a bridge circuit therebetween, and a signal output end of the bridge circuit is connected with a signal input end of a processing circuit arranged on the rotating shaft. When torque measurement is performed, the rotating shaft will be slightly deformed, so that the resistance value of the strain body changes, thereby dragging the bridge circuit to output a voltage signal that changes, the signal is transmitted to the processing circuit for processing, and then output through a signal output device, and the output signal is collected by an external device.

[0044] When the rotating shaft is connected with the main shaft of the motor and the input shaft of the load, in order to ensure the reliability of the connection, the first connecting shaft and the second connecting shaft are designed to be relatively long, and the shaft couplings are connected, so that the entire shafting is relatively long, and the volume and weight of the entire detection device are relatively large, material is consumed during manufacturing, and space is occupied during installation.

[0045] Therefore, the motor torque and speed online monitoring device provided by the embodiments of the present application comprises a shell, a shaft sleeve and a detector, the shell is fixed on the motor, the shaft sleeve is located in the shell, the shaft sleeve is sleeved on the main shaft of the motor, the shaft sleeve is in transmission connection with the main shaft, and one end of the shaft sleeve away from the motor is connected with the load. In this way, the shaft sleeve is sleeved on the main shaft of the motor, the shell is fixed on the motor, the length of the motor torque and speed online monitoring device along the axial direction of the motor can be shortened, the distance between the motor and the load can be reduced, and the space occupied by the entire power system can be reduced.

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0047] Figure 1 A shaft side sectional view of the motor torque and speed online monitoring device provided by the embodiments of the present application is shown in FIG. 1, Figure 2 A front sectional view of the motor torque and speed online monitoring device provided by the embodiments of the present application is shown in FIG. 2, Figure 3 A front sectional view of the motor torque and speed online monitoring device provided by the embodiments of the present application is shown in FIG. 2, Figure 1 A sectional view of the middle shell is shown in FIG. 3, Figure 4 A sectional view of the middle shell is shown in FIG. 3, Figure 1 A sectional view of the middle shaft sleeve is shown in FIG. 4, Figure 5 A shaft side 1 / 4 sectional view of the motor torque and speed online monitoring device provided by the embodiments of the present application is shown in FIG. 5,Figure 6 A schematic diagram of the motor provided by the embodiment of the present application.

[0048] As shown in Figure 1 , Figure 2 , the motor torque and speed online monitoring device provided by the embodiment of the present application comprises a shell 10, a shaft sleeve 20 and a detector, the shell 10 is arranged around a shaft hole 130, the shaft sleeve 20 is arranged in the shaft hole 130, and the center line of the shaft sleeve 20 is arranged in parallel with the center line of the shaft hole 130; one end of the shell 10 along the center line direction of the shaft hole 130 is used for being connected with a driving device, the shaft sleeve 20 is used for being sleeved on a main shaft of the driving device, and the shaft sleeve 20 is in transmission connection with the main shaft; one end of the shaft sleeve 20 away from the driving device is used for being connected with an input shaft of a load 50; the detector is arranged between the shaft sleeve 20 and the shell 10, and the detector is used for detecting output data of the main shaft.

[0049] In the embodiment, the driving device is a device for conveying power outward through the rotation of the main shaft, for example, the driving device can be a motor, and correspondingly, the main shaft is a main shaft 420 of the motor 40; of course, the driving device can also be an internal combustion engine, a hydraulic motor or the like. In order to facilitate the description of the implementation mode of the embodiment of the present application, the driving device is taken as the motor 40 for example in the following embodiments.

[0050] The load 50 is a device driven by the motor 40, the input shaft of the load 50 rotates under the driving of the main shaft 420, and then the load 50 works. The embodiment does not limit the load 50, and the load 50 can be a crusher, a ball mill or the like, and of course, the load 50 can also be other devices.

[0051] In the embodiment, as shown in Figure 5 , the shell 10 is used for supporting part of the structure of the detector and protecting the shaft sleeve 20, and continues to refer to Figure 1 , the connecting end of the shell 10 towards the motor 40 is provided with a first flange plate 110, the first flange plate 110 is provided with a bolt hole, the end surface of the motor 40 is provided with a threaded hole, the bolt passes through the bolt hole and cooperates with the threaded hole, so that the fixation between the shell 10 and the motor 40 is realized. Of course, in other implementation modes, the shell 10 can also be connected with the motor 40 through welding, or the shell 10 and the shell of the motor can also be an integrated structure formed through casting or injection molding and the like.

[0052] As shown in Figure 4-6As shown in the drawings, in some embodiments, the end of the flange towards the motor 40 is provided with a positioning hole 120, the axis of the positioning hole 120 coincides with the center line of the shaft sleeve 20, and the diameter of the positioning hole 120 is greater than the diameter of the shaft hole 130; the motor 40 is provided with a boss at one end of the motor torque and speed online monitoring device, and when the flange is attached to the motor 40, the boss extends into the positioning hole 120 to realize the positioning of the shell 10.

[0053] As shown in the drawings, Figure 1 and Figure 6 The shaft sleeve 20 is in transmission connection with the main shaft 420 and the input shaft, and the main shaft 420 of the motor 40 drives the input shaft to rotate through the shaft sleeve 20. In some implementations, the shaft sleeve 20 and the main shaft 420 are in transmission connection through a flat key 60, and correspondingly, the shaft sleeve 20 is sleeved on the main shaft 420, the inner wall of the shaft sleeve 20 is provided with a first key groove 211, the side wall of the main shaft 420 is provided with a second key groove, and the flat key 60 is arranged in the first key groove 211 and the second key groove to realize the transmission connection between the main shaft 420 and the shaft sleeve 20. Through the flat key 60, the transmission connection between the main shaft 420 and the shaft sleeve 20 is realized, which is simple in structure and convenient for processing and manufacturing.

[0054] Of course, in other implementations, an internal spline can be formed on the inner wall of the shaft sleeve 20, and correspondingly, an external spline is formed on the main shaft 420, and when the main shaft 420 is arranged in the shaft sleeve 20, the internal spline and the external spline are matched to realize the transmission connection between the main shaft 420 and the shaft sleeve 20.

[0055] In some embodiments, the shaft sleeve 20 and the input shaft can be connected through a shaft coupling, of course, the shaft sleeve 20 and the input shaft can also be connected through other structures, as long as the shaft sleeve 20 can drive the input shaft to rotate. For example, Figure 3 , Figure 6 As shown in the drawings, the end of the shaft sleeve 20 away from the motor 40 is provided with a second flange 222, and correspondingly, the input shaft is provided with a third flange 510, the second flange 232 is attached to the third flange, and the second flange 232 and the third flange 510 are connected through bolts to realize the transmission connection between the input shaft and the shaft sleeve 20. Compared with the transmission mode through the shaft coupling, the transmission mode of the connection between the second flange 232 and the third flange 510 further shortens the shafting length of the motor torque and speed online monitoring device.

[0056] In this embodiment, the shaft sleeve 20 can be forged from alloy steel or cast from cast iron and other materials, as long as it has high strength, and the present application does not limit this.

[0057] In some embodiments, as shown in the drawings, Figure 1 , Figure 2 and Figure 5As shown, the shaft sleeve 20 is arranged in the housing 10, the housing 10 is fixedly connected with the motor 40, and the shaft sleeve 20 is sleeved on the main shaft 420, and a safety gap is formed between the outer wall of the shaft sleeve 20 and the inner wall of the shaft hole 130 of the housing 10, so as to avoid mutual interference between the shaft sleeve 20 and the housing 10 during rotation. In this way, a bearing does not need to be arranged between the shaft sleeve 20 and the housing 10, the installation precision of the shaft sleeve 20 and the shaft hole 130 can be reduced, and assembly is facilitated; in addition, the bearing does not need to be arranged, the cost and the complexity of assembly can be reduced.

[0058] For example, the safety gap can be 1.5-2.5 mm, such as 1.5 mm, 2 mm, 2.5 mm, etc. On the premise of ensuring that the shaft sleeve 20 and the inner wall of the shaft hole 130 have a safety distance, the volume of the motor torque and speed online monitoring device is reduced, and the compactness of the structure is improved.

[0059] Continuing to refer to Figure 1 , Figure 2 The detector is arranged between the shaft sleeve 20 and the housing 10, and is used to detect output data of the main shaft 420. The output data can be torque transmitted by the main shaft 420 to the input shaft or other parameters.

[0060] In the implementation mode in which the detector is used to detect the torque transmitted by the main shaft 420 to the input shaft, the detector can include a power supply device 320, a strain body 310, a data transmission device 330, and a processing circuit 340, the strain body 310 and the processing circuit 340 are arranged on the shaft sleeve 20 and are electrically connected between the strain body 310 and the processing circuit 340; the power supply device 320 and the data transmission device 330 are arranged between the shaft sleeve 20 and the housing 10, and the power supply device 320 and the data transmission device 330 are electrically connected with the processing circuit 340. The strain body 310 is used to detect the deformation amount of the shaft sleeve 20, the processing circuit 340 is used to obtain the torque data of the main shaft 420 according to the deformation amount, and the torque is transmitted to an external device through the data transmission device 330.

[0061] In this way, the strain body 310 is used to detect the deformation amount of the shaft sleeve 20, and then the torque transmitted by the main shaft 420 to the input shaft is detected, so that the structure is simple and the accuracy of the detection value is high.

[0062] Further, the strain body 310 can be a strain gauge (resistance strain gauge), which is attached to the shaft sleeve 20, so that when the shaft sleeve 20 deforms, the strain gauge deforms, and then the resistance of the strain gauge changes, the processing circuit 340 forms the torque data according to the change of the resistance, and then controls the data transmission device 330 to transmit the torque data to the external device, so that the external device obtains the torque value output by the main shaft 420.

[0063] In the above implementation, the processing circuit 340 can include a single-chip microcomputer, a micro control unit (MCU), or the like, which can output torque data according to resistance changes of the strain body 310, and the present embodiment is not limited in this regard.

[0064] In some other embodiments, the strain body 310 is a diffused silicon, which is a silicon film based on the piezoelectric effect and can amplify a small displacement and convert it into an electrical signal when subjected to stress.

[0065] The power supply device 320 provides power for the processing circuit 340. In some embodiments, the power supply device 320 is a battery installed on the shaft sleeve 20.

[0066] In some other embodiments, as shown in Figure 1 , Figure 2 The power supply device 320 includes a first power supply coil 321 and a second power supply coil 322. The first power supply coil 321 is arranged on the shaft sleeve 20 and electrically connected to the processing circuit 340. The second power supply coil 322 is arranged on the housing 10 and corresponds to the first power supply coil 321. In this way, the second power supply coil 322 can supply power to the first power supply coil 321 in a non-contact manner, achieving power supply without affecting the rotation of the shaft sleeve 20.

[0067] Further, the second power supply coil 322 corresponds to the first power supply coil 321, and the first power supply coil 321 is located in the magnetic field of the second power supply coil 322. When the second power supply coil 322 generates an alternating magnetic field, an electric current is formed on the first power supply coil 321, thereby supplying power to the strain body 310 and the processing circuit 340.

[0068] Continuing to refer to Figures 1-2 , the data transmission device 330 is connected to the processing circuit 340 and transmits the output signal of the processing circuit 340 to an external device. In some embodiments, the data transmission device 330 includes a first data coil 331 and a second data coil 332. The first data coil 331 is arranged on the shaft sleeve 20 and electrically connected to the processing circuit 340. The second data coil 332 is arranged on the housing 10 and corresponds to the first data coil 331. In this way, the signal from the processing circuit 340 can be transmitted to the external device in a wireless manner, thereby achieving torque detection.

[0069] Further, the second data coil 332 corresponds to the first data coil 331, and the second data coil 332 is located in the magnetic field of the first data coil 331. When the first data coil 331 is subjected to a magnetic field with a changed resistance of the strain gauge, an electric current is formed on the second data coil 332 to output torque data.

[0070] In other embodiments, such as Figure 4 As shown, the data transmission device 330 also includes a junction box 350. The junction box 350 integrates an external circuit connected to the second data coil 332 and an aviation connector for the signal output data line. The external circuit connects to external devices via the output data line to complete data transmission. The integrated design of the junction box 350 improves the neatness and rationality of the wiring for the online motor torque and speed monitoring device.

[0071] It is worth noting that the external device can be a personal computer, monitor, or server that can receive signals from the data transmission device 330 and then present the detected torque value to the user.

[0072] The installation process of the online monitoring device for motor torque and speed provided in this embodiment is as follows: the bushing 20 is fitted onto the main shaft 420, then the housing 10 is fitted onto the bushing 20, and the housing 10 is fixed onto the motor 40; the bushing 20 is connected to the input shaft.

[0073] During testing: The main shaft 420 of the motor 40 is connected to the input shaft through the bushing 20 and rotates. At this time, the bushing 20 undergoes a slight deformation, which causes the strain gauge 310 to deform, and the resistance of the strain gauge 310 changes. At the same time, the second power supply coil 322 supplies power to the first power supply coil 321, which in turn supplies power to the processing circuit 340. The processing circuit 340 converts the resistance change of the strain gauge 310 into torque data, which is then output to the external device by the first data coil 331 and the second data coil 332.

[0074] The online torque and speed monitoring device for an electric motor provided in this application includes a housing 10, a bushing 20, and a detector. The housing 10 forms a shaft hole 130, and the bushing 20 passes through the shaft hole 130. One end of the housing 10 along the center line of the shaft hole 130 is used to connect to the electric motor 40. The bushing 20 is used to fit onto the main shaft 420 of the electric motor 40, and there is a transmission connection between the bushing 20 and the main shaft 420. The end of the bushing 20 away from the drive device is used to connect to the input shaft of the load 50. The housing 10 is fixedly connected to the electric motor 40, and the bushing is fitted onto the main shaft 420, so that part of the main shaft 420 can pass through the inside of the housing 10. Compared with separating the housing 10 from the electric motor 40 and connecting the first connecting shaft protruding from the housing 10 to the main shaft 420 through a coupling, this shortens the distance between the electric motor 40 and the housing 10, thereby reducing the distance between the electric motor 40 and the load 50 and reducing the space occupied by the entire power system.

[0075] Meanwhile, the shell 10 is connected with the motor 40 and supported by the motor 40, so that an additional support is not needed to fix the shell 10, and the structure of the shafting is simplified; since the shaft sleeve is sleeved on the main shaft 420, positioning of the shaft sleeve and the main shaft 420 is not needed, and the assembly difficulty is reduced; the detector arranged between the shaft sleeve 20 and the shell 10 can detect the output data of the main shaft 420 in real time.

[0076] With reference to the foregoing Figure 2 Further, the first data coil 331 is arranged along the center line direction of the shaft sleeve 20 and spaced from the first power supply coil 321, so as to avoid mutual interference between magnetic fields.

[0077] The strain body 310 is located between the first power supply coil 321 and the first data coil 331, and the strain body 310 is attached to the outer wall of the shaft sleeve 20, so as to facilitate installation of the strain gauge.

[0078] In some embodiments, the shaft sleeve 20 includes a sleeve body 210 and a column body 220 arranged at an end of the sleeve body 210 away from the motor 40, the column body 220 is provided with a connecting portion 230 at an end thereof away from the motor 40, the first power supply coil 321 is sleeved on the sleeve body 210, the strain body 310 is arranged on the column body 220, the first power supply coil 321 is arranged on the connecting portion 230, and the processing circuit 340 is arranged at an end of the connecting portion 230 away from the motor 40; the connecting portion 230 is used for transmission connection with the input shaft.

[0079] Further, the column body 220 is provided with a process hole 221 along the axial direction, so that the diameter of the process hole 221 is as large as possible on the basis of ensuring the strength of the shaft sleeve 20, so as to reduce the weight of the shaft sleeve 20.

[0080] For example, the diameter of the column body 220 can be smaller than the outer diameter of the sleeve body 210, so that the column body 220 is more easily deformed on the basis of ensuring the strength of the shaft sleeve 20, so as to facilitate deformation of the strain body 310. Of course, the diameter of the column body 220 can also be equal to the outer diameter of the sleeve body 210, and the present embodiment does not limit this.

[0081] In the implementation mode in which the shaft sleeve 20 is transmission connected with the input shaft through the second flange plate 232 and the third flange plate 510 on the input shaft, the connecting portion 230 can be the second flange plate 232; of course, in other implementation modes, the connecting portion 230 can also be other structures connected with the input shaft.

[0082] For example Figures 1-3As shown, the end of the connecting part 230 away from the motor 40 is provided with a receiving groove 231, and the processing circuit 340 is arranged in the receiving groove 231. In this way, the receiving groove 231 can protect the processing circuit 340, and the arrangement of the processing circuit 340 in the receiving groove 231 can also improve the compactness of the motor torque and speed online monitoring device.

[0083] Further, a cover plate 341 is arranged at the end of the receiving groove 231, and the cover plate 341 is detachably connected with the connecting part 230 by means of bolt connection or clamping, so as to further improve the protection effect of the processing circuit 340.

[0084] Further, as shown in the drawings, Figure 3 the sleeve body 210 is radially provided with a first wire hole 212, the first wire hole 212 is arranged in the orthographic projection of the first power coil 321 on the outer wall of the sleeve body 210, the sleeve body 210 is axially provided with a second wire hole 213, the second wire hole 213 penetrates the sleeve body 210 and communicates with the first wire hole 212; the connecting part 230 is radially provided with a third wire hole 233, the third wire hole 233 is located in the orthographic projection of the first data coil 331 on the outer wall of the connecting part 230, and the connecting part 230 is axially provided with a fourth wire hole 234, the fourth wire hole 234 penetrates the connecting part 230 and communicates with the third wire hole 233. The above arrangement facilitates the electrical connection between the first power coil 321, the first data coil 331 and the processing circuit 340.

[0085] In some possible embodiments, as shown in the drawings, Figure 2 and Figure 6 the detector further comprises a speed detector 30 for detecting the speed of the main shaft 420, and the speed detector 30 comprises a sensor 362 and a detection disc 361 arranged on the sleeve 20, the outer periphery of the detection disc 361 is provided with a plurality of grid slots, and the plurality of grid slots are arranged at equal intervals around the axis of the sleeve 20; the sensor is arranged on the inner wall of the shaft hole 130, and the sensor and the detection disc 361 are located in the same plane; the sensor is used to count the number of grid slots passing through the sensor per unit time, and then the speed of the sleeve 20 is obtained.

[0086] For example, the sensor can be a distance detector such as an infrared tube pair or a laser tube pair, and of course the sensor can also be a Hall sensor, and correspondingly, the detection disc 361 between adjacent grid slots is provided with magnetism. As long as the sensor can detect the grid slots, the present embodiment does not make any limitation.

[0087] The present application also provides a motor 40 comprising a motor housing and the motor torque and speed online monitoring device in any one of the above embodiments, and the shell 10 of the motor torque and speed online monitoring device is connected with the motor housing.

[0088] The motor torque and speed on-line monitoring device in the motor 40 provided by the embodiment comprises a shell 10, a shaft sleeve 20 and a detector, the shell 10 is arranged as a shaft hole 130, the shaft sleeve 20 is arranged in the shaft hole 130, one end of the shell 10 along the center line direction of the shaft hole 130 is used for connecting with the motor 40, the shaft sleeve 20 is used for sleeving on the main shaft 420 of the motor, and the shaft sleeve 20 is in transmission connection with the main shaft 420, and the end of the shaft sleeve 20 away from the motor 40 is used for connecting the input shaft of the load 50. The shell 10 is fixedly connected with the motor 40, the shaft sleeve 20 is sleeved on the main shaft 420, so that part of the main shaft 420 can be arranged in the shell 10; compared with the first connecting shaft in the shell 10 and the main shaft 420 being connected through a shaft coupling, the distance between the motor 40 and the shell 10 is shortened, and the distance between the motor 40 and the load 50 is reduced, and the space occupied by the whole power system is reduced.

[0089] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An on-line monitoring device for torque and speed of an electric motor, characterized by, The device comprises a shell, a shaft sleeve and a detector, The shell surrounds a shaft hole, the shaft sleeve is arranged in the shaft hole, and the center line of the shaft sleeve is parallel to the center line of the shaft hole; one end of the shell along the center line direction of the shaft hole is used for connecting with a driving device, the shaft sleeve is used for sleeving on a main shaft of the driving device, and the shaft sleeve is in transmission connection with the main shaft; the other end of the shaft sleeve away from the driving device is used for connecting an input shaft of a load; The detector is arranged between the shaft sleeve and the shell, and is used for detecting output data of the main shaft; The detector comprises a power supply device, a strain body, a data transmission device and a processing circuit, the strain body and the processing circuit are arranged on the shaft sleeve, and the strain body is in electrical connection with the processing circuit; the power supply device and the data transmission device are arranged between the shaft sleeve and the shell, and the power supply device and the data transmission device are in electrical connection with the processing circuit; The power supply device comprises a first power supply coil and a second power supply coil, the first power supply coil is arranged on the shaft sleeve, and the first power supply coil is in electrical connection with the processing circuit; the second power supply coil is arranged on the shell, and the second power supply coil corresponds to the first power supply coil; The data transmission device comprises a first data coil and a second data coil, the first data coil is arranged on the shaft sleeve, and the first data coil is in electrical connection with the processing circuit; the second data coil is arranged on the shell, and the second data coil corresponds to the first data coil; The data transmission device further comprises a junction box, the junction box is integrated with an external circuit connected with the second data coil and an aviation plug connected with a signal output data line, the external circuit is connected with an external device through the output data line, and data transmission is completed.

2. The on-line monitoring device for motor torque and speed according to claim 1, characterized in that, A safety gap is formed between the outer wall of the shaft sleeve and the hole wall of the shaft hole.

3. The on-line monitoring device for motor torque and speed according to claim 1, characterized in that, The shaft sleeve and the main shaft are in transmission connection through a flat key.

4. The online monitoring device for torque and rotating speed of an electric motor according to any one of claims 1-3, wherein The strain body is used for detecting a deformation amount of the shaft sleeve, the processing circuit is used for obtaining torque data of the main shaft according to the deformation amount, and the torque is sent to an external device through the data transmission device.

5. The on-line monitoring device for motor torque and speed according to claim 1, characterized in that, The first data coil and the first power supply coil are arranged in a spaced manner along the center line direction of the shaft sleeve, the strain body is located between the first power supply coil and the first data coil, and the strain body is attached to the outer wall of the shaft sleeve.

6. The on-line motor torque speed monitoring device of claim 5, wherein, The shaft sleeve comprises a sleeve body and a column arranged at one end of the sleeve body away from the driving device, a connecting portion is arranged at one end of the column away from the driving device, the first power supply coil is sleeved on the sleeve body, the strain body is arranged on the column, the first power supply coil is arranged on the connecting portion, and the processing circuit is arranged at one end of the connecting portion away from the driving device; the connecting portion is used for being in transmission connection with the input shaft.

7. The on-line motor torque speed monitoring apparatus of claim 6, wherein, The connecting part is provided with a containing groove at one end away from the driving device, and the processing circuit is arranged in the containing groove.

8. An electric motor characterized by The motor torque and speed online monitoring device of any one of claims 1-7 is connected with the motor housing.

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