Automatic cogging torque testing device

Abstract

The invention provides a cogging torque automatic testing device which comprises a base, three lifting assemblies are connected to the base in a sliding mode, the three lifting assemblies are connected into the same rail in a sliding mode, and a tested prototype, a torque sensor and a servo motor are sequentially installed on the three lifting assemblies distributed in the length direction of the rail respectively. The lifting assembly is provided with a centering clamping assembly corresponding to the torque sensor, the tested sample machine or the servo motor. The device is reasonable in design, effectively solves the problem that the axial center line of each device is inconvenient to adjust to the same height through the lifting assembly, effectively clamps a torque sensor, a tested prototype and a servo motor through the centering clamping assembly, guarantees that the axial center lines of the devices are collinear, provides a powerful guarantee for the stability of automatic cogging torque testing, and improves the testing efficiency. And specialized testing work is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of cogging torque testing, in particular to an automatic cogging torque testing device. Background Art

[0002] Permanent magnet motors have the advantages of simple structure, small size, light weight and reliable operation. With the continuous improvement of the performance of permanent magnet materials, permanent magnet motors are increasingly used in speed and position control systems. However, the motor structural parameters will cause torque pulsation. This defect limits the application of motors in high-precision control systems. In permanent magnet motors, cogging torque is an important reason for vibration, noise and difficulty in improving system control accuracy. How to accurately measure the cogging torque of the motor has become the focus of motor design and manufacturing. In some cogging torque tests, it is necessary to keep the servo motor, torque sensor and prototype tightly connected on the same axis. If the axes of the servo motor, torque sensor and prototype are inconsistent, when the motor is running, due to the unbalanced force and torque, the system will vibrate. These vibrations will not only affect the normal operation of the measuring equipment (such as the torque sensor) and shorten its service life, but may also cause the connection parts to loosen. When connected on the same axis, the force of the system is more uniform and reasonable, which can effectively reduce vibration and noise, ensure the stability of the test process and the reliability of the test system, and ensure long-term and high-precision cogging torque measurement. To this end, we propose an automatic cogging torque test device. Summary of the invention

[0003] In view of this, the purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide an automatic cogging torque testing device with reasonable design. The problem that the axial center lines of various equipment are not convenient to adjust to the same height is effectively solved through the lifting component. The torque sensor, the test sample and the servo motor are effectively clamped through the centering clamping component to ensure that the axial center lines of various equipment are in line, thereby providing a strong guarantee for the stability of the automatic cogging torque test.

[0004] The present invention is implemented by the following scheme: an automatic testing device for tooth slot torque: comprising a base, on which three lifting assemblies are slidably connected, and the three lifting assemblies are slidably connected in the same track, and the three lifting assemblies distributed along the length direction of the track are respectively and sequentially installed with a sample to be tested, a torque sensor and a servo motor, and the lifting assemblies are installed with a centering clamping assembly corresponding to the torque sensor, the sample to be tested or the servo motor.

[0005] Furthermore, the lifting assembly includes a bottom slide plate, on which a carrying plate is mounted, and one side of the forward side or the backward side of the carrying plate is connected to the bottom slide plate via a first screw mechanism, and the other side is connected to the bottom slide plate via a telescopic rod mechanism.

[0006] Furthermore, the first screw mechanism includes a first screw, which is vertically rotatably connected to the bottom slide plate, a nesting hole corresponding to the first screw is opened on the bearing plate, a screw nut matching the first screw is nested in the nesting hole, and a handwheel for driving the first screw to rotate is installed on the lower end of the first screw outside the bottom slide.

[0007] Furthermore, the telescopic rod mechanism includes at least two telescopic rods, which are installed at intervals on one side of the bottom slide. The telescopic rod includes a vertically arranged sleeve, which is fixed on the bottom slide. A sleeve rod is slidably connected in the sleeve, and the upper end of the sleeve rod extends out of the sleeve, and the extended end of the sleeve rod is connected to the supporting plate.

[0008] Furthermore, the centering clamping assembly includes clamps that are symmetrically slidably connected to the side of the supporting plate, and a driving assembly for driving one of the clamps to slide is installed on the lower surface of the forward or backward side of the supporting plate, and a linkage assembly for driving the two clamps to open and close synchronously is installed in the middle of the lower surface of the supporting plate.

[0009] Furthermore, the clamping plate includes an L-shaped clamping plate, the vertical plate body of the clamping plate is on the top and the horizontal plate body is on the bottom, the horizontal plate body of the clamping plate is installed with a sliding plate, a guide rail is arranged under the bearing plate corresponding to the sliding direction of the clamping plate, and a guide block is arranged on the sliding plate corresponding to the guide rail.

[0010] Furthermore, the drive assembly includes a horizontally arranged second screw assembly, the second screw assembly includes a horizontally arranged second screw, one end of the second screw is fixed to a sliding plate thereof, and the other end is rotatably connected to an internally threaded rotating cylinder, and the internally threaded rotating cylinder is rotatably connected under the supporting plate.

[0011] Furthermore, at least one rotating drum seat is arranged under the supporting plate, the internally threaded rotating drum is rotatably connected to the rotating drum seat, the outer sleeve of the internally threaded rotating drum is provided with a limiting ring for limiting the axial sliding of the internally threaded rotating drum, a threaded hole cooperating with the second screw rod is arranged in one end of the internally threaded rotating drum, and the other end extends out from the lower surface of the supporting plate and is equipped with a triangular handle for driving the internally threaded rotating drum to rotate.

[0012] Furthermore, the linkage assembly includes a transmission plate rotatably connected to the bottom of the bearing plate, and a connecting rod is rotatably connected to the corresponding sliding plate on the transmission plate. One end of the connecting rod is rotatably connected to the transmission plate, and the other end is rotatably connected to the sliding plate.

[0013] Furthermore, a rectangular clearance opening is provided on the side of the bearing plate corresponding to the clamping plate, a rubber pad is installed on the inner side of the vertical plate body of the clamping plate, a sliding track for the sliding movement of the lifting component is opened on the base, and a roller is rotatably connected to the side wall corresponding to the sliding track on the side of the bottom slide plate, and a limited roller groove is provided on the side wall of the sliding track corresponding to the roller.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The lifting assembly designed in the present invention effectively solves the problem that the axial center lines of various equipment are not convenient to be adjusted to the same height. The three lifting assemblies are all based on the same design principle for height adjustment. During operation, the hand wheels of the three lifting assemblies are rotated respectively to make each bearing plate rise or fall. Since each lifting assembly has an independent height adjustment capability, the height of the bearing plate supporting the servo motor, the torque sensor and the tested prototype can be adjusted respectively. After the three lifting assemblies are brought together, it is convenient to observe the position of the axis of each equipment, and then the axial center lines of various equipment are finally adjusted to the same height by means of the precise transmission of the screw rod and the internal threaded sleeve and the stabilizing effect of the telescopic rod; 2. The centering clamping assembly designed in the present invention provides a strong guarantee for the stability of the automatic test of the tooth slot torque. The centering clamping assembly is symmetrically arranged on the front and rear sides of the load-bearing plate with the center of the load-bearing plate as the reference. This symmetrical design is the basis for ensuring stability. The two clamping plates are symmetrically distributed with the center of the load-bearing plate. When clamping the equipment, force can be evenly applied from both sides, making the force on the equipment more balanced, avoiding deviation or shaking due to excessive force on one side, and creating favorable conditions for the stability of the test; 3. The lifting assembly and the centering clamping assembly designed by the present invention cooperate with each other, which is the key to ensuring that the axial center lines of each device are in line. The centering clamping assembly is symmetrically arranged with the center of the load-bearing plate as the reference, and the two clamping plates are located on the front and rear sides of the load-bearing plate. This symmetrical layout is the basis for achieving the coincidence of the axial center line of the device and the transverse center line of the load-bearing plate in the top view. From the design point of view, with the transverse center line of the load-bearing plate as the symmetry axis, when the centering clamping assembly is working, the clamping force generated by it is evenly distributed on both sides of the center line. This symmetrical force can guide the device to approach the transverse center line of the load-bearing plate during the clamping process, so that the axial center line of the device is gradually aligned with the transverse center line of the load-bearing plate. Since the transverse center lines of the three load-bearing plates are in line, after the three devices are completely clamped, the axial center lines of the devices are in line in the top view, and then the height of each device can be adjusted by the lifting assembly, and finally the axial center lines of the device are in line in both the front view and the top view, that is, the axial center lines of each device are completely in line, thereby meeting the requirements of the automatic test of the tooth slot torque for the coaxial height of each device, and improving the accuracy of the entire test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the detection device in an embodiment of the present invention; Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A; Figure 3 It is a front view of the detection device after the axis is calibrated in the embodiment of the present invention; Figure 4 It is a top view of the schematic diagram detection device in the embodiment of the present invention after the axis is calibrated; Figure 5 Schematic diagram of the positions of the lifting assembly and the centering clamping assembly in an embodiment of the present invention; Figure 6 Schematic diagram of the positions and postures of the load-bearing plate and the centering clamping assembly in an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle; Figure 8 It is a schematic diagram of the overall structure of the centering clamping assembly in an embodiment of the present invention; Fig. 9 1 is a view of the alternating positions of the centering clamping assembly in an embodiment of the present invention.

[0016] In the figure: 1. base; 101. limit roller groove; 2. lifting assembly; 21. bottom slide plate; 211. roller; 22. load-bearing plate; 221. screw nut; 222. drum rotating seat; 223. guide rail; 224. clearance port; 23. first screw; 24. handwheel; 25. telescopic rod; 3. centering clamping assembly; 31. internal thread drum; 311. limit ring; 312. triangular handle; 32. second screw; 321. connecting bracket; 33. clamping plate; 331. guide block; 332. rubber pad; 34. connecting rod; 35. transmission plate; 351. connecting shaft; 4. torque sensor; 5. tested prototype; 6. servo motor. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] like Figure 1-9 As shown, an automatic testing device for tooth slot torque includes a base 1, on which three lifting assemblies 2 are slidably connected, and the three lifting assemblies are slidably connected in the same track. A test sample 5, a torque sensor 4 and a servo motor 6 are installed in sequence on the three lifting assemblies distributed along the length direction of the track, that is, a torque sensor is installed on the middle lifting assembly, and a test sample and a servo motor are installed on the lifting assemblies on both sides, respectively. Meanwhile, the torque sensor, the test sample and the servo motor are all existing equipment, which are not the invention points of the present device, so they will not be elaborated. A centering clamping assembly 3 is installed on the lifting assembly corresponding to the torque sensor, the test sample or the servo motor. When in use, the lifting assembly is used to effectively solve the problem that the axial center lines of various equipment are not convenient to adjust to the same height. The centering clamping assembly is used to effectively clamp the torque sensor, the test sample and the servo motor to ensure that the axial center lines of various equipment are in line, thereby providing a strong guarantee for the stability of the automatic testing of tooth slot torque.

[0021] In the present embodiment, in order to realize the lifting and lowering of the lifting assembly, the lifting assembly includes a bottom slide plate 21, a carrying plate 22 is mounted on the bottom slide plate, one side of the forward side or the backward side of the carrying plate is connected to the bottom slide plate by a first screw mechanism, and the other side is connected to the bottom slide plate by a telescopic rod mechanism. When in use, the carrying plate is arranged directly above the bottom slide plate, and the lifting and lowering are realized by the first screw mechanism. The telescopic rod mechanism is used for auxiliary lifting and auxiliary support. The specific structure of the first screw mechanism is as follows: the first screw mechanism includes a first screw rod 23, which is vertically rotatably connected to the bottom slide plate, that is, a rotating bearing matched with the lower end of the first screw rod is installed on the bottom slide, a nesting hole is opened on the carrying plate corresponding to the first screw rod, a screw nut 221 matched with the first screw rod is nested in the nesting hole, and a hand wheel 24 for driving the first screw rod to rotate is mounted on the lower end of the first screw rod outside the top of the bottom slide; the ... The structure is as follows: the telescopic rod mechanism includes at least two telescopic rods 25, which are installed at intervals on one side of the bottom slide, and the telescopic rod includes a vertically arranged sleeve, which is fixed on the bottom slide, and a sleeve rod is slidably connected in the sleeve, and the upper end of the sleeve rod extends out of the sleeve, and the extended end of the sleeve rod is connected to the load-bearing plate. When in use, the hand wheel drives the first screw rod to rotate. Since the first screw rod cooperates with the screw nut on the load-bearing plate, and the bottom end of the first screw rod rotates with the bearing of the bottom slide, under the auxiliary support and limitation of the two telescopic rods, as the first screw rod rotates, the load-bearing plate can move up and down along the first screw rod, thereby realizing the adjustment of the height of the load-bearing plate, and then adjusting the height of the equipment placed on the load-bearing plate. At the same time, when it is necessary to fix the height of the equipment placed on the load-bearing plate, the position of the sleeve rod in the sleeve can be fixed by bolt locking, which is convenient for auxiliary fixation. Of course, other methods can also be used for fixing, as long as the fixing and loosening of the sleeve rod can be achieved.

[0022] In this embodiment, in order to realize that the centering clamping assembly can effectively fix the equipment, the centering clamping assembly includes clamping plates that are symmetrically slidably connected to the side of the carrying plate, and a driving assembly for driving one of the clamping plates to slide is installed on the lower surface of the forward side or the backward side of the carrying plate, and a linkage assembly for driving the two clamping plates to open and close synchronously is installed in the middle of the lower surface of the carrying plate, that is, the two clamping plates are symmetrically distributed with the carrying plate as the center, and the two clamping plates are located on the left and right sides of the forward direction of the bottom slide plate. In this way, when clamping the equipment, force can be evenly applied from both sides to make the force on the equipment more balanced, avoiding deviation or shaking due to excessive force on one side, and at the same time, one of the clamping plates is driven to approach the carrying plate or move away from the carrying plate by the driving assembly, and then the other clamping plate is driven to approach the carrying plate or move away from the carrying plate synchronously by the linkage assembly to achieve clamping. Equipment, the specific structure of the clamping plate is: the clamping plate includes an L-shaped clamping plate 33, the vertical plate body of the clamping plate is on the top, and the horizontal plate body of the clamping plate is installed with a sliding plate, specifically, the plate body of the vertical plate body of the clamping plate is perpendicular to the supporting plate, and a guide rail 223 is arranged under the supporting plate corresponding to the sliding direction of the clamping plate, and a guide block 331 is arranged on the sliding plate corresponding to the guide rail, and the sliding direction of the guide rail is horizontally perpendicular to the forward direction of the bottom slide plate, and the guide block slides along the guide rail, which not only accurately limits the moving direction of the clamping plate to ensure that the clamping plate moves along a predetermined straight line direction, but also can withstand the lateral force generated by the clamping plate when clamping the equipment, this limiting guiding effect can prevent the clamping plate from deflecting during the movement and clamping process, thereby improving the accuracy and stability of the equipment clamping.

[0023] In this embodiment, in order to realize that the driving component can drive one of the sliding plates to slide, the driving component includes a horizontally arranged second screw rod assembly, the second screw rod assembly includes a horizontally arranged second screw rod 32, the second screw rod is parallel to the guide rail, one end of the second screw rod is fixed to one of the sliding plates, and an L-shaped connecting bracket 321 can be fixed on the sliding plate, one end of the second screw rod is fixed to the connecting bracket, and the other end is rotatably connected to an internally threaded rotating cylinder 31, and the internally threaded rotating cylinder is rotatably connected under the bearing plate. When in use, the second screw rod is screwed in or out by rotating the internally threaded rotating cylinder, thereby driving one of the sliding plates fixed with the second screw rod to slide. Of course, in order to realize that only the second screw rod moves along the axial direction, the bearing plate needs to axially rotate the internally threaded rotating cylinder. To limit the upward movement, specifically, at least one drum rotating seat 222 is arranged under the supporting plate. The present device adopts two, but of course more is also possible. The internally threaded drum is rotatably connected to the drum rotating seat, and a plurality of limiting rings 311 for limiting the axial slippage of the internally threaded drum are threadedly arranged on the outer shell of the internally threaded drum. The limiting rings can be located on both sides of the drum rotating seat so that the drum rotating seat is limited between the two limiting rings, which does not affect the rotation of the internally threaded drum and also limits the axial movement of the internally threaded drum. A threaded hole cooperating with the second screw rod is arranged at one end of the internally threaded drum, and the other end extends out from the lower surface of the supporting plate and is equipped with a triangular handle 312 for driving the internally threaded drum to rotate. The rotation of the internally threaded drum is achieved by rotating the triangular handle.

[0024] In this embodiment, in order to realize that when one sliding plate slides, the other sliding plate can be driven to slide, the linkage assembly includes a transmission plate 35 rotatably connected to the bottom of the supporting plate, and the transmission plate can be a diamond plate. A connecting shaft 351 is provided in the middle of the top of the transmission plate, and the connecting shaft is rotatably matched with a bearing provided in the middle of the bottom of the supporting plate. The corresponding sliding plate on the transmission plate is rotatably connected with a connecting rod 34, which can be a connecting rod rotatably connected on the two acute-angle ends of the diamond plate. One end of the connecting rod is rotatably connected to the transmission plate, and the other end is rotatably connected to the sliding plate, so that when one sliding plate slides, it will drive the connecting rod to swing, thereby driving the diamond plate to rotate, and then driving the other connecting rod to swing, and finally achieving the realization of driving the other sliding plate to slide synchronously.

[0025] In this embodiment, for the sake of reasonable design, a rectangular clearance opening 224 is provided on the side of the supporting plate corresponding to the clamping plate, that is, the supporting plate is in an I-shape, and the clearance opening provided on the supporting plate facilitates the clamping of smaller equipment by the clamping plate; a rubber pad 332 is installed on the inner side of the vertical plate body of the clamping plate; a sliding track for the sliding movement of the lifting component is provided on the base, and a roller 211 is rotatably connected to the side wall corresponding to the return of the sliding track on the side of the bottom slide plate, and a limiting roller groove 101 is provided on the side wall of the sliding track corresponding to the roller, and the smoothness and stability of the movement are guaranteed by the cooperation between the roller and the limiting roller groove. The rotation connection method in this device can be the existing shaft type, and of course it can also be other existing rotation connection methods, as long as rotation can be achieved.

[0026] In this embodiment, the working principle is: First, each piece of equipment is clamped in the center, and the triangular handle on the internal thread drum is turned to rotate the internal thread drum. Since the second screw rod cooperates with the internal thread drum, the second screw rod will move in the horizontal direction, and the clamping plate connected to the end of the second screw rod will move synchronously under the drive of the second screw rod. At the same time, through the transmission action of the transmission plate and the connecting rod, the other clamping plate will also move in the opposite direction or opposite direction. During the movement of the clamping plate, its guide block slides on the guide rail at the bottom of the bearing plate to ensure the accurate movement direction. When the clamping plate is close to the equipment, the rubber pad at the clamping end of the clamping plate is used to clamp and fix the equipment, so as to realize the stable clamping of the torque sensor, the tested sample and the servo motor placed on the bearing plate. At this time, the axial center lines of each piece of equipment are collinear in the top view. Secondly, adjust the axial center lines of each device to the same height. When adjusting, bring the three lifting components together, and use the height of one of the bearing plates as a reference. For example, first adjust the bearing plate supporting the torque sensor to a suitable initial height, and then adjust the heights of the other two bearing plates in turn. By observing the heights of the axial center lines of each device, make them in the same height plane, and by constantly fine-tuning the rotation angle of each first screw rod, with the help of the precise transmission of the first screw rod and the screw rod nut and the stabilizing effect of the telescopic rod, finally achieve the consistency of the height of the axial center lines of the three devices. At this time, with the cooperation of the lifting component and the centering clamping component, the axial center lines of each device are completely collinear; Finally, after the servo motor reaches the specified speed by controlling the pulse frequency, the servo motor uses its own holding torque as a fixed end of the torque sensor, so that the torque acts on the torque sensor. The collected torque is then processed to obtain a two-dimensional display of the cogging torque, and the cogging torque value is read out. At this point, the entire workflow is completed.

[0027] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0028] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0029] Single supine machine If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0030] In addition, the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" used in any of the technical solutions disclosed in the above-mentioned invention are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent. Unless otherwise stated, the terms used to indicate shapes used in any of the technical solutions disclosed in the above-mentioned invention include shapes that are approximate, similar, or close to them.

[0031] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A cogging torque automatic testing device, characterized in that: It includes a base, on which three lifting assemblies are slidably connected, and the three lifting assemblies are slidably connected in the same track. The three lifting assemblies distributed along the length direction of the track are respectively installed with a sample to be tested, a torque sensor and a servo motor in sequence, and the lifting assemblies are installed with a centering clamping assembly corresponding to the torque sensor, the sample to be tested or the servo motor.

2. The automatic cogging torque testing device according to claim 1, characterized in that: The lifting assembly includes a bottom slide plate, on which a carrying plate is mounted. One side of the forward side or the backward side of the carrying plate is connected to the bottom slide plate via a first screw mechanism, and the other side is connected to the bottom slide plate via a telescopic rod mechanism.

3. The automatic cogging torque testing device according to claim 2, characterized in that: The first screw mechanism includes a first screw, which is vertically rotatably connected to the bottom slide plate. A nesting hole is provided on the supporting plate corresponding to the first screw, and a screw nut matching the first screw is nested in the nesting hole. A handwheel that drives the first screw to rotate is mounted on the lower end of the first screw outside the bottom slide.

4. The automatic cogging torque test device according to claim 2, characterized in that: The telescopic rod mechanism includes at least two telescopic rods, which are installed at intervals on one side of the bottom slide. The telescopic rod includes a vertically arranged sleeve, which is fixed on the bottom slide. A sleeve rod is slidably connected in the sleeve, and the upper end of the sleeve rod extends out of the sleeve, and the extended end of the sleeve rod is connected to the bearing plate.

5. The automatic cogging torque testing device according to claim 2, characterized in that: The centering clamping assembly includes clamping plates that are symmetrically slidably connected to the side of the supporting plate. A driving assembly for driving one of the clamping plates to slide is installed on the lower surface of the forward or backward side of the supporting plate. A linkage assembly for driving the two clamping plates to open and close synchronously is installed in the middle of the lower surface of the supporting plate.

6. The automatic cogging torque testing device according to claim 5, characterized in that: The clamping plate includes an L-shaped clamping plate, with a vertical plate body on the top and a horizontal plate body on the bottom. The horizontal plate body of the clamping plate is installed with a sliding plate. A guide rail is arranged under the bearing plate corresponding to the sliding direction of the clamping plate, and a guide block is arranged on the sliding plate corresponding to the guide rail.

7. The automatic cogging torque test device according to claim 6, characterized in that: The driving assembly includes a second screw assembly arranged horizontally, and the second screw assembly includes a second screw arranged horizontally, one end of the second screw is fixed to a sliding plate thereof, and the other end is rotatably connected to an internal threaded rotating cylinder, and the internal threaded rotating cylinder is rotatably connected under the bearing plate.

8. The automatic cogging torque testing device according to claim 7, characterized in that: At least one drum rotating seat is arranged under the supporting plate, the internally threaded drum is rotatably connected to the drum rotating seat, a limiting ring is arranged outside the internally threaded drum to limit the axial sliding of the internally threaded drum, a threaded hole cooperating with the second screw rod is arranged inside one end of the internally threaded drum, and the other end extends out from the lower surface of the supporting plate and is equipped with a triangular handle for driving the internally threaded drum to rotate.

9. The automatic cogging torque testing device according to claim 6, characterized in that: The linkage assembly includes a transmission plate rotatably connected to the bottom of the bearing plate, a connecting rod rotatably connected to the corresponding sliding plate on the transmission plate, one end of the connecting rod is rotatably connected to the transmission plate, and the other end is rotatably connected to the sliding plate.

10. The automatic cogging torque testing device according to claim 6, characterized in that: A rectangular clearance opening is arranged on the side of the bearing plate corresponding to the clamping plate, a rubber pad is installed on the inner side of the vertical plate body of the clamping plate, a sliding track for sliding movement of the lifting component is opened on the base, a roller is rotatably connected to the side wall corresponding to the return of the sliding track on the side of the bottom slide plate, and a limited roller groove is arranged on the side wall of the sliding track corresponding to the roller.

Images