Motor Load and Self-locking Force Tester and Testing Method

Abstract

The present invention relates to a motor load and self-locking force testing machine and its testing method, which includes a frame, a motor base, a connecting plate, a weight seat, a self-locking force component, a rope loosening component, and a pulley group; the motor base is provided with a locking component for fixing the motor to be tested; the connecting plate is provided with a wire hanging plate, and the end of the steel wire rope of the motor to be tested is stuck on the wire hanging plate; the upper part of the weight seat is provided with a hook and a hook disengaging component, and the weight seat is detachably suspended below the connecting plate through the hook, and the hook is clamped into and disengaged from the connecting plate through the hook disengaging component; in the load testing stage, the weight seat is hung on the connecting plate through the hook, and the gravity of the connecting plate and the weight seat forms a load acting on the motor to be tested; in the self-locking force testing stage, the self-locking force component exerts a downward pressing force on the connecting plate and the weight seat; in the rope loosening stage, the rope loosening component drives the connecting plate and the wire hanging plate to be loosened from the end of the steel wire rope. The present invention conducts load and self-locking force tests on the motor, and a certain length of steel wire rope is left outside after the test.

Description

Technical Field

[0001] The present invention relates to the technical field of motor load testing, and particularly to a finished product load test and self-locking force test for a micro motor, i.e., the motor for the clothes drying rack's wire rope retraction and extension. Background Art

[0002] Motors, as power sources, have extensive applications, especially in the household appliance field. For example, in an electric clothes drying rack, a motor is required to drive the clothes drying rack to lift and lower. As disclosed in a Chinese invention with the application number CN202022047059.X, a new type of electric clothes drying rack lifting motor includes a driving part, a transmission part, a planetary gear train, and a wire wheel. The wire wheel winds a steel wire cable used to connect the clothes drying rack, and the driving part drives the wire wheel to rotate to retract and extend the cable.

[0003] To ensure that the motor meets the usage requirements, it is necessary to conduct load tests and self-locking force tests on the motors before leaving the factory. The load test simulates the situation where the motor still drives the clothes drying rack to lift and lower at a set speed and power after the clothes drying rack is hung with clothes. The self-locking in the gearbox of the motor is achieved through a worm and a helical gear, and the self-locking force test is used to simulate the weight required for the clothes drying rack to hang clothes in daily use. Currently, when testing motors, the load test and the self-locking force test are separately carried out, and then the wire is separately wound to the required length, resulting in low work efficiency. Summary of the Invention

[0004] To solve the deficiencies of the prior art, the present invention provides a motor load and self-locking force testing machine, which can conduct load tests, self-locking force tests, and wire winding (winding the steel wire rope) on the motor to be tested.

[0005] The present invention also provides a testing method for the testing machine to conduct load tests and self-locking force tests on the motor to be tested.

[0006] To achieve the above object, the technical solution provided by the present invention is: a motor load and self-locking force testing machine, including a frame, a motor base, a connecting plate, a weight base, a self-locking force component, a rope loosening component, and a pulley group; the motor base is arranged on the upper part of the frame, the connecting plate and the weight base are arranged below the motor base in a liftable manner, and the self-locking force component and the rope loosening component are respectively arranged on the lifting paths of the connecting plate; the motor base is provided with a locking component for fixing the motor to be tested; the connecting plate is provided with a wire hanging plate, and the end of the steel wire rope of the motor to be tested is stuck on the wire hanging plate. A lifting guide rail is arranged on the frame, and the connecting plate slides up and down along the lifting guide rail; the weight base is provided with at least one weight, and a hook and a hook disengaging component are arranged on the upper part of the weight base. The weight base is detachably suspended below the connecting plate through the hook, and the hook is clamped into and disengaged from the connecting plate through the hook disengaging component; a plurality of pulleys of the pulley group are arranged on the frame at intervals to guide the steel wire rope of the motor to be tested to extend from the motor base to the wire hanging plate; in the load test stage, the weight base is hung on the connecting plate through the hook, and the gravity of the connecting plate and the weight base forms a load acting on the motor to be tested; in the self-locking force test stage, the self-locking force component exerts a downward pressing force on the connecting plate and the weight base; in the rope loosening stage, the rope loosening component drives the connecting plate and the wire hanging plate to be disengaged from the end of the steel wire rope.

[0007] In the above technical solution, the motor to be tested is vertically fixed on the frame through the motor base. The motor base is provided with a positioning pin and a positioning groove for initially positioning the motor to be tested. The positioning pin is connected to the positioning hole on the motor to be tested, and a positioning magnet magnetically connected to the motor to be tested is arranged in the positioning groove; the locking component includes a locking cylinder and a pressing arm. The locking cylinder is fixed on the outer side of the seat body of the motor base, and the pressing arm is rotatably arranged at the driving end of the locking cylinder. The locking cylinder drives the pressing arm to clamp and fix the motor to be tested on the motor base.

[0008] In the above technical solution, a wire hanging groove for clamping the end of the steel wire rope of the motor to be tested is formed by inwardly opening one outer side wall of the wire hanging plate; a baffle is arranged on the outside of the wire hanging plate in an openable and closable manner; when the end of the steel wire rope of the motor to be tested is stuck into the wire hanging groove, the baffle buckled on the wire hanging plate is located in the direction of the end of the steel wire rope disengaging from the wire hanging groove and buckles the end of the steel wire rope on the wire hanging plate.

[0009] In the above technical solution, a rotating shaft and a magnet are arranged between the baffle and the wire hanging plate. The rotating shaft and the magnet are located on both sides of the wire hanging groove. The baffle is rotatably arranged on one side of the wire hanging plate through the rotating shaft and forms an openable and closable magnetic fixing structure with the wire hanging plate through the magnet.

[0010] In the above technical solution, the decoupling component includes a hook seat, a decoupling cylinder, and a movable joint. The hook seat is fixed to the upper part of the weight seat. The lower part of the hook is rotatably arranged on the hook seat through a rotating shaft. A clamping groove cooperating with the connecting plate is arranged on the upper part of the hook. The middle part of the hook is connected to the decoupling cylinder through a movable joint. The decoupling cylinder is installed on the upper part of the weight seat through a cylinder seat. The decoupling cylinder drives the hook to engage with and disengage from the connecting plate.

[0011] In the above technical solution, it further includes a tensioning mechanism for tensioning the steel wire rope of the motor to be tested. The tensioning mechanism includes a first tensioning cylinder, a tensioning guide rail, a tensioning seat, a second tensioning cylinder, and a tensioning slide plate arranged in sequence from top to bottom. The first tensioning cylinder and the tensioning guide rail are linearly arranged on the machine frame. The first tensioning cylinder drives the tensioning seat to move along the tensioning guide rail. The second tensioning cylinder is arranged on the tensioning seat. The second tensioning cylinder drives the tensioning slide plate to slide in the chute of the tensioning seat. The pulley group includes a first pulley, a second pulley, and a third pulley. The first pulley is arranged outside the motor seat. The second pulley is arranged on the tensioning slide plate. The third pulley is arranged on the top of the machine frame. The second pulley is located between the first pulley and the third pulley. The tensioning mechanism adjusts the length of the steel wire rope between the first pulley and the third pulley by driving the second pulley to tension the steel wire rope of the motor to be tested.

[0012] In the above technical solution, the loose rope component includes a lifting cylinder, a lifting plate, a lifting rod, and a lifting guide rail. The lifting cylinder and the lifting guide rail are arranged in parallel on the machine frame. The lifting plate is arranged on the driving end of the lifting cylinder. The lifting rod is vertically arranged on the lifting plate and extends from the lifting plate to below the connecting plate. The lifting cylinder drives the lifting plate to move back and forth between the motor to be tested and the weight seat along the lifting guide rail. The lifting cylinder lifts the connecting plate through the lifting rod, so that the rope end of the steel wire rope moves towards the motor to be tested.

[0013] In the above technical solution, the self-locking force component includes a downward pressure cylinder, a moving cylinder, a moving plate, and a moving guide rail. The moving cylinder is installed on the machine frame through a cylinder seat. The moving guide rail is arranged on one side of the moving cylinder. One end of the moving plate is connected to the driving end of the moving cylinder and is slidably connected to the moving guide rail. The other end of the moving plate is installed with the downward pressure cylinder. In the self-locking force test stage, the moving cylinder drives the downward pressure cylinder to move to the rising path of the weight seat. The driving end of the downward pressure cylinder acts on the connecting plate and the weight seat to generate a second load.

[0014] In the above technical solution, at least one weight is fixed below the weight seat. Guide columns are arranged on both sides of the weight seat on the frame, and a lifting cylinder is arranged directly below the weight seat. The guide columns are fixed on the bottom plate of the frame, and the bottom plate is provided with rubber pads which are located directly below the weights; the bottom of the lifting cylinder is fixed on the frame, and the upper part of the lifting cylinder extends to the lower surface of the weight seat.

[0015] Another technical solution provided by the present invention is: a method for testing the load and self-locking force of a motor, including the above-mentioned testing machine, and the load and self-locking force of the motor to be tested are tested by the testing machine. The testing method includes the following steps:

[0016] Step 1, fix the motor to be tested. The motor seat is preliminarily positioned with the motor to be tested through a positioning pin and a positioning groove. Rotate the pressing arm to the position of the motor to be tested, and the locking cylinder drives the pressing arm to clamp and fix the motor to be tested on the motor seat.

[0017] Step 2, hang the steel wire ropes. Separate the two steel wire ropes of the motor to be tested. After each steel wire rope bypasses the first pulley, the second pulley and the third pulley in sequence, the rope end of the steel wire rope is clamped into the wire hanging groove, and the baffle is buckled to fasten the rope end of the steel wire rope on the wire hanging plate.

[0018] Step 3, in the load testing stage, the hook is stuck on the connecting plate through the hook releasing cylinder of the hook releasing assembly. The tensioning mechanism moves the second pulley to tension the steel wire rope. Power is supplied to the motor to be tested, and the steel wire rope is retracted upward into the motor to be tested. The sum of the weights of the connecting plate and the weight seat driven upward by the steel wire rope is the load weight. Move upward a distance sensed and controlled by the sensor, and the testing machine calculates the speed of the motor to be tested according to the time for moving this distance.

[0019] Step 4, in the self-locking force testing stage, the pressing cylinder moves to the rising path of the weight seat. The connecting plate and the weight seat move to the position of the pressing cylinder, and the pressing cylinder applies a force to the connecting plate and the weight seat for self-locking force testing. During the self-locking force testing process, the motor to be tested is in a power-off state, and the steel wire rope inside it shall not loosen.

[0020] Step 5, in the rope retracting stage, the lifting cylinder extends upward to support the weight seat. The hook releasing cylinder of the hook releasing assembly on the weight seat extends, driving the hook away from the connecting plate. Power is supplied to the motor to be tested, and the steel wire rope takes in the weight of the connecting plate and is retracted into the motor to be tested, and a certain length of steel wire rope is reserved outside the motor to be tested. At the same time, the lifting cylinder retracts to drive the weight seat to move downward and reset.

[0021] Step 6, in the rope loosening stage, the motor to be tested is powered off, and the lifting cylinder drives the lifting rod to lift the connecting plate to loosen the steel wire rope from the connecting plate, so that there is no connection force between the rope end of the steel wire rope and the wire hanging plate, realizing rope loosening.

[0022] Step 7: Pull the baffle to take out the rope end of the wire rope from the wire hanging groove, lock the air cylinder to drive the pressing arm to disengage from the motor under test, rotate the pressing arm to the outside of the motor under test, remove the motor under test from the motor base, and the lifting air cylinder drives the connecting plate to move downward and reset.

[0023] The beneficial effects of the present invention are as follows: The structure of the present invention is reasonable, the design is novel, and the practicability is strong. Weights are used as test loads to test the power, current, speed, and self-locking force performance of the motor. For motors that pass the test, the wire ropes are retracted into the gearbox of the motor, and a certain length of wire rope is reserved outside; the testing machine has two workstations on the left and right, and the operation and testing are carried out simultaneously to complete the load test, self-locking force test, and rope retraction in sequence. Description of the Drawings

[0024] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0025] Figure 2 It is a three-dimensional structure schematic diagram of the present invention after removing the frame.

[0026] Figure 3 It is a structure schematic diagram of the motor base (without the motor).

[0027] Figure 4 It is a structure schematic diagram of the motor base (with the motor locked).

[0028] Figure 5 It is a structure schematic diagram between the connecting plate and the wire hanging plate.

[0029] Figure 6 It is an exploded structure schematic diagram of the wire hanging plate and the baffle.

[0030] Figure 7 It is a structure schematic diagram of the wire hanging plate.

[0031] Figure 8 It is a structure schematic diagram of the baffle.

[0032] Figure 9 It is a structure schematic diagram of the loose rope assembly.

[0033] Figure 10 It is a structure schematic diagram of the hook and the hook disengaging assembly.

[0034] Figure 11 It is a structure schematic diagram of the self-locking force assembly.

[0035] Figure 12 It is a structure schematic diagram during the self-locking force test.

[0036] In the figure: 1. Frame; 11. Lifting guide rail; 12. PLC; 13. First sensor; 14. Second sensor; 2. Motor base; 21. Positioning area; 22. Positioning pin; 23. Positioning groove; 24. Positioning magnet; 25. Locking cylinder; 26. Pressing arm; 27. Pressing head; 3. Connecting plate; 31. Panel; 32. Wire hanging plate; 321. Wire hanging groove; 322. Wire clamping groove; 33. Baffle; 331. Upper stop block; 332. Lower stop block; 333. Clamping groove; 34. Concave position; 35. Hanging rod; 36. Second magnet; 37. First fixing block; 38. Second fixing block; 4. Weight seat; 41. Hook; 411. Contact surface; 412. Card slot; 413. Rotating shaft; 414. First mounting block; 415. Second mounting block; 42. Hook releasing assembly; 421. Hook releasing cylinder; 422. Cylinder seat; 423. Movable joint; 44. First weight; 45. Second weight; 46. Jacking cylinder; 47. Rubber pad; 48. Bottom plate; 49. Guide post; 5. Self-locking force assembly; 51. Moving cylinder; 52. Moving guide rail; 53. Moving plate; 54. Pressing-down cylinder; 55. Through hole; 6. Loose rope assembly; 61. Lifting guide rail; 62. Lifting cylinder; 63. Lifting plate; 64. Lifting rod; 7. Pulley block; 71. First pulley; 72. Second pulley; 73. Third pulley; 8. Tensioning mechanism; 81. First tensioning cylinder; 82. Tensioning guide rail; 83. Tensioning seat; 84. Second tensioning cylinder; 85. Chute; 86. Tensioning sliding plate; 9. Motor to be tested; 91. Motor; 92. Gearbox; 10. Steel wire rope; 101. Rope end. Specific embodiments

[0037] The specific embodiments of the present invention are introduced with reference to the accompanying drawings.

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present invention without creative efforts belong to the scope of protection of the present invention. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed by the present invention, some design, manufacturing or production changes made on the basis of the technical content disclosed by the present invention are only conventional technical means and should not be understood that the content disclosed by the present invention is insufficient.

[0039] References to "embodiments" in this invention mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment each time, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art will explicitly and implicitly understand that the embodiments described in this invention can be combined with other embodiments without conflict.

[0040] Unless otherwise defined, technical terms or scientific terms involved in this invention shall have the ordinary meanings understood by those of ordinary skill in the technical field to which this invention belongs. The words such as "a", "an", "motor load, self-locking force testing machine and its testing method", "the" and the like involved in this invention do not indicate a limitation in quantity and can represent either a singular or a plural number. The terms "comprise", "include", "have" and any variations thereof involved in this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in this invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this invention means greater than or equal to two. "And / or" describes the associated relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The terms "first", "second", "third", etc. involved in this invention are only used to distinguish similar objects and do not represent a specific order for the objects.

[0041] As Figure 1 shown, the figure is a three-dimensional structure diagram of the testing machine. The testing machine has two workstations and can test two motors simultaneously to improve the testing efficiency. The motor base 2 is on the upper part of the frame 11, the weight base 4 is on the lower part of the frame 1, and the motor under test 9 is fixed on the motor base 2. As Figure 2 shown, the steel wire rope 10 of the motor under test 9 is towed through a pulley and then hung on the wire hanging board 32.

[0042] As Figures 1 - 12As shown in the figure, the motor load and self-locking force testing machine includes a frame 1, a motor base 2, a connecting plate 3, a weight seat 4, a self-locking force assembly 5, a rope-loosening assembly 6, a pulley group 7, and a tensioning mechanism 8 for tensioning the steel wire rope 10 of the motor 9 to be tested. The motor base 2 is arranged at the upper part of the frame 1. The connecting plate 3 and the weight seat 4 are arranged below the motor base 2 in a liftable manner. The self-locking force assembly 5 and the rope-loosening assembly 6 are respectively arranged on the lifting paths of the connecting plate 3. The motor base 2 is provided with a locking assembly for fixing the motor 9 to be tested. The connecting plate 3 is provided with a wire-hanging plate 32. The wire head 101 of the steel wire rope 10 of the motor 9 to be tested is stuck on the wire-hanging plate 32. The frame 1 is provided with a lifting guide rail 11, and the connecting plate 3 slides up and down along the lifting guide rail 11. The weight seat 4 is provided with at least one weight. The upper part of the weight seat 4 is provided with a hook 41 and a hook-removing assembly 42. The weight seat 4 is detachably suspended below the connecting plate 3 through the hook 41, and the hook 41 is clamped into and disengaged from the connecting plate 3 through the hook-removing assembly 42. The multiple pulleys of the pulley group 7 are arranged on the frame 1 at intervals to guide the steel wire rope 10 of the motor 9 to be tested to extend from the motor base 2 to the wire-hanging plate 32. In the load test stage, the weight seat 4 is hung on the connecting plate 3 through the hook 41, and the gravity of the connecting plate 3 and the weight seat 4 forms a load acting on the motor 9 to be tested. In the self-locking force test stage, the self-locking force assembly 5 applies a downward pressing force to the connecting plate 3 and the weight seat 4. In the rope-loosening stage, the rope-loosening assembly 6 drives the connecting plate 3 to move towards the motor base 2.

[0043] As Figure 4 shown, the motor 9 to be tested includes a motor 91 and a gearbox 92. Inside the gearbox 92, gears drive the rotation around the pulley, driving the steel wire rope 10 around the pulley to be wound and unwound. The above-mentioned motor 9 to be tested is similar to the lifting motor disclosed in the Chinese design with the application number CN202130406837.7. This lifting motor is used to adjust the lifting of a clothes hanger during actual use. However, this is not a limitation on the motor 9 to be tested in the present invention. The motor 9 to be tested can also be a motor used for pulling curtains and screens.

[0044] As Figures 1 - 4 shown, the motor 9 to be tested is vertically fixed on the frame 1 through the motor base 2. The motor base 2 is provided with a positioning pin 22 and a positioning groove 23 for initially positioning the motor 9 to be tested. The positioning pin 22 is connected to the positioning hole on the motor 9 to be tested, and a positioning magnet 24 magnetically connected to the motor 91 of the motor 9 to be tested is arranged in the positioning groove 23. The locking assembly includes a locking cylinder 25 and a pressing arm 26. The locking cylinder 25 is fixed on the outside of the body of the motor base 2, and the pressing arm 26 is rotatably arranged at the driving end of the locking cylinder 25. The locking cylinder 25 drives the pressing arm 26 to clamp and fix the motor 9 to be tested on the motor base 2. The outer shell of the motor 91 of the motor 9 to be tested is magnetically attracted by the positioning magnet 24, thereby magnetically positioning the motor 91.

[0045] One end of the pressure arm 26 is fixed to the driving end of the locking cylinder 25. Since the piston rod as the driving end of the locking cylinder 25 can rotate relative to the cylinder body of the locking cylinder 25, the pressure arm 26 and the piston rod can rotate relative to the cylinder body of the locking cylinder 25 together, so that the pressure arm 26 can rotate back and forth between the inner side of the positioning area 21 and the outer side of the positioning area 21 with the locking cylinder 25 as the center. The other end of the pressure arm 26 is provided with a pressure head 27 that contacts the gear box 92 of the motor 9 to be tested. The pressure head 27 is a rubber pressure head 27 to avoid scratching the gear box 92 of the motor 9 to be tested.

[0046] like Figures 6 - 8 As shown, an outer wall of the wire hanging plate 32 is provided with a wire hanging groove 321 for clamping the wire rope 10 end 101 of the motor 9 to be tested; a baffle 33 is provided on the outer side of the wire hanging plate 32 to be opened and closed; when the wire rope 10 end of the motor 9 to be tested is clamped into the wire hanging groove 321, the baffle 33 buckled on the wire hanging plate 32 is located in the direction of the wire rope 10 end in the wire hanging groove 321 to be separated, and the wire rope 10 end is buckled on the wire hanging plate 32. A panel 31 is provided between the connecting plate and the slider of the lifting guide rail, the wire hanging plate 32 and the baffle 33 are provided on the panel 31, and the second fixing block 38 of the panel 31 is provided with a hanging rod 35 connected to the connecting plate; the wire hanging plate 32 is installed on the two first fixing blocks 37 of the panel 31.

[0047] A wire hanging shaft and a second magnet 36 are provided between the baffle 33 and the wire hanging plate 32. The shaft 413 and the second magnet 36 are located on both sides of the wire hanging groove 321. The baffle 33 is rotatably provided on one side of the wire hanging plate 32 through the wire hanging shaft, and forms an openable and closable magnetic attraction fixing structure with the wire hanging plate 32 through the second magnet 36. The wire hanging plate 32 is made of iron alloy, and the second magnet 36 is embedded on one side of the baffle 33 near the wire hanging plate 32.

[0048] The lower part of the wire hanging groove 321 is provided with a wire clamping groove 322, the inner diameter of the wire hanging groove 321 is smaller than the outer diameter of the rope head 101 of the wire rope 10, and the inner diameter of the wire clamping groove 322 is between the inner diameter of the wire hanging groove 321 and the outer diameter of the rope head 101 of the wire rope 10. The wire hanging plate 32 is in a "冂" shape, and the two vertical ends of the wire hanging plate 32 are fixed on the slider by screws, and the wire hanging groove 321 runs through the horizontal body of the wire hanging plate 32 from top to bottom. The upper and lower sides of the baffle 33 are respectively vertically provided with an upper block 331 and a lower block 332, and a clamping groove 333 is formed between the upper block 331 and the lower block 332 to be clamped with the main body of the wire hanging plate 32.

[0049] like Figure 10As shown in the figure, the decoupling assembly 42 can drive the hook 41 to disengage from the connecting plate 3. The decoupling assembly 42 includes a hook seat, a decoupling cylinder 421, and a movable joint 423. The hook seat is fixed to the upper part of the weight seat 4. The lower part of the hook 41 is rotatably arranged on the hook seat through a rotating shaft 413. A clamping groove 412 for cooperating with the connecting plate 3 is arranged on the upper part of the hook 41. The middle part of the hook 41 is connected to the decoupling cylinder 421 through the movable joint 423. The decoupling cylinder 421 is installed on the upper part of the weight seat 4 through a cylinder seat 422. The decoupling cylinder 421 drives the hook 41 to engage with and disengage from the connecting plate 3. A concave position 34 for cooperating with the clamping groove 412 of the hook 41 is arranged in the middle of the connecting plate 3. The hook seat is composed of a first mounting block 414 and a second mounting block 415. The hook is arranged between the first mounting block and the second mounting block.

[0050] As Figure 2 shown in the figure, the tensioning mechanism 8 includes a first tensioning cylinder 81, a tensioning guide rail 82, a tensioning seat 83, a second tensioning cylinder 84, and a tensioning slide plate 86 arranged in sequence from top to bottom. The first tensioning cylinder 81 and the tensioning guide rail 82 are linearly arranged on the machine frame 1. The first tensioning cylinder 81 drives the tensioning seat 83 to move along the tensioning guide rail 82. The second tensioning cylinder 84 is arranged on the tensioning seat 83. The second tensioning cylinder 84 drives the tensioning slide plate 86 to slide in the chute 85 of the tensioning seat 83. The pulley group 7 includes a first pulley 71, a second pulley 72, and a third pulley 73. The first pulley 71 is arranged outside the motor seat 2. The second pulley 72 is arranged on the tensioning slide plate 86. The third pulley 73 is arranged on the top of the machine frame 1. The second pulley 72 is located between the first pulley 71 and the third pulley 73. The tensioning mechanism 8 adjusts the length of the steel wire rope 10 between the first pulley 71 and the third pulley 73 by driving the second pulley 72 to tension the steel wire rope 10 of the motor 9 to be tested.

[0051] The first tensioning cylinder 81 of the tensioning mechanism extends downward before and throughout the test. Its downward thrust is jointly controlled by a pressure regulating valve, a gas release valve, and an electronic pressure gauge. After the steel wire rope is wound up and before the steel wire rope is loosened, the first tensioning cylinder 81 turns to retract upward. After the motor to be tested is taken out, the operator presses the reset button, and the first tensioning cylinder 81 resumes extending downward. The first tensioning cylinder 81 retracts upward before the test and extends downward at the start of the load test to tension the steel wire rope (the steel wire rope is loose after the operator hangs the rope).

[0052] As Figure 9As shown in the figure, the loose rope assembly 6 includes a lifting cylinder 62, a lifting plate 63, a lifting rod 64, and a lifting guide rail 61. The lifting cylinder 62 and the lifting guide rail 61 are arranged in parallel on the frame 1. The lifting plate 63 is arranged on the driving end of the lifting cylinder 62. The lifting rod 64 is vertically arranged on the lifting plate 63, and the lifting rod 64 extends from the lifting plate 63 to below the connecting plate 3. The lifting cylinder 62 drives the lifting plate 63 to move back and forth between the motor to be tested 9 and the weight seat 4 along the lifting guide rail 61. The lifting cylinder 62 lifts the connecting plate 3 through the lifting rod 64, so that the rope end 101 of the steel wire rope 10 moves towards the motor to be tested 9.

[0053] The lifting cylinder 62 is a rodless cylinder. Both ends of the rodless cylinder are fixed to the frame 1 of the testing machine, and the rodless cylinder is arranged between the two lifting guide rails 61.

[0054] As Figure 11 shown in the figure, the self-locking force assembly 5 includes a pressing cylinder 54, a moving cylinder 51, a moving plate 53, and a moving guide rail 52. The moving cylinder 51 is installed on the frame 1 through a cylinder seat 422. The moving guide rail 52 is arranged on one side of the moving cylinder 51. One end of the moving plate 53 is connected to the driving end of the moving cylinder 51 and is slidably connected to the moving guide rail 52. The other end of the moving plate 53 is installed with the pressing cylinder 54. During the self-locking force test stage, the moving cylinder 51 drives the pressing cylinder 54 to move to the rising path of the weight seat 4, and the driving end of the pressing cylinder 54 acts on the connecting plate 3 and the weight seat 4 to generate a second load. The moving plate 53 is provided with a through hole 55 penetrating the moving plate 53, and the driving end of the pressing cylinder 54 is inserted into the through hole 55. The upper part of the hook 41 is provided with a contact surface 411. During the self-locking force test, the driving end of the pressing cylinder 54 acts on the contact surface 411. During the self-locking force test process, the load formed by the connecting plate and the weight seat and the downward pressing force of the pressing cylinder 54 act on the motor to be tested 9 together.

[0055] As Figure 2 、 12 shown in the figure, two groups of weight sets are fixed below the weight seat 4. There are a total of four weights in the two groups of weight sets. The frame 1 is provided with guide columns 49 on both sides of the weight seat 4 and a jacking cylinder 46 is provided directly below the weight seat 4. The weight seat 4 is slidably connected to the guide columns 49 through linear bearings. The guide columns 49 are fixed on the bottom plate 48 of the frame 1. The bottom plate 48 is provided with a rubber pad 47, and the rubber pad 47 is located directly below the weight. The bottom of the jacking cylinder 46 is fixed on the frame 1, and the upper part of the jacking cylinder 46 extends to the lower surface of the weight seat 4. The weight set includes a first weight 44 and a second weight 45. The upper ends of the first weight 44 and the second weight 45 are both fixed to the weight seat 4 by screws, and the height of the first weight 44 is higher than that of the second weight 45. The jacking cylinder 46 is located between the two groups of weight sets.

[0056] As Figure 12As shown, the driving end of the lifting cylinder 46 moves up and down with the weight seat 4. During the unhooking process, the lifting cylinder 46 extends upward to support the weight seat. The unhooking cylinder 421 of the unhooking component on the weight seat extends, the hook 41 leaves the connecting plate, the motor under test is powered on, and the steel wire rope takes in the weight of the connecting plate into the motor under test. When the motor under test 9 being tested is unqualified, the load will damage the self-locking force of the motor under test 9, resulting in the weight seat 4 falling off the frame 1 uncontrollably. The driving end of the lifting cylinder 46 located below the weight seat 4 will support the weight seat 4 to prevent the weight seat 4 from hitting directly, ensuring the test safety of the testing machine.

[0057] This testing machine tests the motor under test: First, the weight seat is hung with weights for load testing. During the operation of the motor under test powered on, the steel wire rope is taken into the motor under test upward. The sum of the weights of the connecting plate and the weight seat driven by the steel wire rope is the load weight. It moves upward a distance sensed and controlled by two first sensors 13. The PLC (12) of the testing machine calculates the speed based on the time of moving this distance (this speed is preset by the customer). The first sensor 13 is a proximity switch used to sense the position of the connecting plate. Second, for the self-locking force test, on the basis of the load test, an additional force (controlled by a pressure regulating valve) is applied by the self-locking force component mechanism. During the self-locking force test, the motor under test is in a powered-off state and the steel wire rope inside it shall not loosen. Third, after the self-locking force test is completed, unhooking is carried out. The lifting cylinder 46 extends upward to support the weight seat. The unhooking cylinder 421 of the unhooking component on the weight seat extends, the hook 41 leaves the connecting plate, the motor under test is powered on, the steel wire rope takes in the weight of the connecting plate into the motor under test, and the reserved length of the steel wire is controlled by the second sensor 14. At the same time, the lifting cylinder 46 retracts, driving the weight seat back to its original position; the second sensor 14 is an infrared sensor, and the second sensor 14 is higher than the uppermost first sensor 13. Fourth is to loosen the rope. After unhooking is completed, the motor under test is powered off. The lifting cylinder 62 of the rope-loosening component moves upward, driving the lifting rod 64 to lift the connecting plate, the steel wire rope is loosened, the operator removes the steel wire rope, removes the motor under test, and the lifting cylinder 62 moves downward to reset.

[0058] A method for testing the motor load and self-locking force, including the above-mentioned testing machine, tests the motor under test 9 for load and self-locking force through the testing machine. The testing method includes the following steps:

[0059] Step 1, fix the motor under test 9. The motor seat 2 is initially positioned with the motor under test 9 through the positioning pin 22 and the positioning groove 23. The pressing arm 26 is rotated to the position of the motor under test 9, and the locking cylinder 25 drives the pressing arm 26 to clamp and fix the motor under test 9 on the motor seat 2.

[0060] Step 2: Hang the steel wire ropes 10. Separate the two steel wire ropes 10 of the motor 9 to be tested. Each steel wire rope 10 is successively wound around the first pulley 71, the second pulley 72, and the third pulley 73, and then the rope end 101 of the steel wire rope 10 is clamped into the wire hanging groove 321. The baffle 33 is buckled to tightly fasten the rope end 101 of the steel wire rope 10 on the wire hanging plate 32.

[0061] Step 3: Load test stage. The hook 41 is clamped on the connecting plate 3 through the hook releasing cylinder 421 of the hook releasing assembly 42. The tensioning mechanism 8 moves the second pulley 72 to tension the steel wire rope 10. The motor 9 to be tested is powered on, and the steel wire rope is retracted into the motor 9 to be tested upwards. The sum of the weights of the connecting plate and the weight seat driven upwards by the steel wire rope is the load weight. It moves upwards a distance sensed and controlled by the sensor, and the testing machine calculates the speed of the motor 9 to be tested according to the time taken to move this distance.

[0062] Step 4: Self-locking force test stage. The pressing cylinder 54 moves to the rising path of the weight seat 4. The connecting plate 3 and the weight seat 4 move to the position of the pressing cylinder 54, and the pressing cylinder 54 applies a force to the connecting plate 3 and the weight seat 4 for the self-locking force test. During the self-locking force test, the motor 9 to be tested is in a power-off state, and the steel wire rope inside it shall not loosen.

[0063] Step 5: Rope retracting stage. The lifting cylinder 46 extends upwards to support the weight seat. The hook releasing cylinder of the hook releasing assembly on the weight seat extends, driving the hook to leave the connecting plate. The motor 9 to be tested is powered on, and the steel wire rope takes in the weight of the connecting plate and is retracted into the motor 9 to be tested. A certain length of the steel wire rope is reserved outside the motor 9 to be tested. At the same time, the lifting cylinder retracts to drive the weight seat to move downwards to reset.

[0064] Step 6: Rope releasing stage. The motor 9 to be tested is powered off. The lifting cylinder 62 drives the lifting rod to lift the connecting plate to loosen the steel wire rope from the connecting plate, so that there is no connection force between the rope end of the steel wire rope and the wire hanging plate, realizing rope releasing.

[0065] Step 7: Remove the motor 9 to be tested. Flip the baffle 33 and take out the rope end 101 of the steel wire rope 10 from the wire hanging groove 321. The locking cylinder 25 drives the pressing arm 26 to disengage from the motor 9 to be tested, rotates the pressing arm 26 to the outside of the motor 9 to be tested, removes the motor 9 to be tested from the motor seat 2, and the lifting cylinder 62 drives the connecting plate to move downwards to reset.

[0066] The structure of the present invention is reasonable, the design is novel, and the practicability is strong. Weights are used as the test load to test the power, current, speed, and self-locking force performance of the motor. For the motors passing the test, the steel wire ropes 10 are retracted into the gearbox 92 of the motor, and a certain length of the steel wire rope 10 is reserved outside. The testing machine has two working stations on the left and right, and the operation and testing are carried out simultaneously, successively completing the load test, self-locking force test, and rope retracting.

[0067] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. Motor load and self-locking force testing machine, characterized in that, It includes a frame, a motor base, a connecting plate, a weight seat, a self-locking force assembly, a rope-loosing assembly, and a pulley group; the motor base is arranged on the upper part of the frame, the connecting plate and the weight seat are arranged below the motor base in a liftable manner, and the self-locking force assembly and the rope-loosing assembly are respectively arranged on the lifting paths of the connecting plate; the motor base is provided with a locking assembly for fixing the motor to be tested; the connecting plate is provided with a wire-hanging plate, and the end of the steel wire rope of the motor to be tested is stuck on the wire-hanging plate. A lifting guide rail is arranged on the frame, and the connecting plate slides up and down along the lifting guide rail; the weight seat is provided with at least one weight, and a hook and a hook-releasing assembly are arranged on the upper part of the weight seat. The weight seat is detachably suspended below the connecting plate through the hook, and the hook is clamped into and disengaged from the connecting plate through the hook-releasing assembly; multiple pulleys of the pulley group are arranged on the frame at intervals to guide the steel wire rope of the motor to be tested to extend from the motor base to the wire-hanging plate; in the load test stage, the weight seat is hung on the connecting plate through the hook, and the gravity of the connecting plate and the weight seat forms a load acting on the motor to be tested; in the self-locking force test stage, the self-locking force assembly exerts a downward pressing force on the connecting plate and the weight seat. In the rope-loosing stage, the rope-loosing assembly drives the connecting plate and the wire-hanging plate to be disengaged from the end of the steel wire rope; the rope-loosing assembly includes a lifting cylinder, a lifting plate, a lifting rod, and a lifting guide rail. The lifting cylinder and the lifting guide rail are arranged on the frame in parallel. The lifting plate is arranged on the driving end of the lifting cylinder. The lifting rod is vertically arranged on the lifting plate and extends from the lifting plate to below the connecting plate; the lifting cylinder drives the lifting plate to move back and forth between the motor to be tested and the weight seat along the lifting guide rail, and the lifting cylinder lifts the connecting plate through the lifting rod so that the end of the steel wire rope moves towards the motor to be tested; the self-locking force assembly includes a downward pressing cylinder, a moving cylinder, a moving plate, and a moving guide rail. The moving cylinder is installed on the frame through a cylinder seat. The moving guide rail is arranged on one side of the moving cylinder. One end of the moving plate is connected to the driving end of the moving cylinder and is slidably connected to the moving guide rail. The other end of the moving plate is installed with a downward pressing cylinder; in the self-locking force test stage, the moving cylinder drives the downward pressing cylinder to move to the rising path of the weight seat, and the driving end of the downward pressing cylinder acts on the connecting plate and the weight seat to generate a second load.

2. The motor load and self-locking force testing machine according to claim 1, characterized in that, The motor to be tested is vertically fixed on the frame through the motor base. The motor base is provided with a positioning pin and a positioning groove for initially positioning the motor to be tested. The positioning pin is connected to the positioning hole on the motor to be tested, and a positioning magnet magnetically connected to the motor to be tested's motor is arranged in the positioning groove; the locking assembly includes a locking cylinder and a pressing arm. The locking cylinder is fixed on the outside of the motor base body, and the pressing arm is rotatably arranged on the driving end of the locking cylinder. The locking cylinder drives the pressing arm to clamp and fix the motor to be tested on the motor base.

3. The motor load and self-locking force testing machine according to claim 2, wherein A wire-hanging groove for clamping the end of the steel wire rope of the motor to be tested is formed by inwardly opening on an outer side wall of the wire-hanging plate; a baffle is arranged on the outside of the wire-hanging plate in an openable and closable manner; when the end of the steel wire rope of the motor to be tested is stuck into the wire-hanging groove, the baffle buckled on the wire-hanging plate is located in the direction of the end of the steel wire rope disengaging from the wire-hanging groove and buckles the end of the steel wire rope on the wire-hanging plate.

4. The motor load and self-locking force testing machine according to claim 3, characterized in that, A rotating shaft and a magnet are arranged between the baffle and the wire hanging board. The rotating shaft and the magnet are located on both sides of the wire hanging groove. The baffle is rotatably arranged on one side of the wire hanging board through the rotating shaft and forms an openable and closable magnetic attraction fixing structure with the wire hanging board through the magnet.

5. The motor load and self-locking force testing machine according to claim 4, characterized in that, The hook detachment assembly includes a hook seat, a hook detachment cylinder, and a movable joint. The hook seat is fixed on the upper part of the weight seat. The lower part of the hook is rotatably arranged on the hook seat through a rotating shaft. A clamping groove cooperating with the connecting plate is arranged on the upper part of the hook. The middle part of the hook is connected to the hook detachment cylinder through the movable joint. The hook detachment cylinder is installed on the upper part of the weight seat through a cylinder seat. The hook detachment cylinder drives the hook to be clamped into and detached from the connecting plate.

6. The motor load and self-locking force testing machine according to claim 5, wherein, It further includes a tensioning mechanism for tensioning the steel wire rope of the motor to be tested. The tensioning mechanism includes a first tensioning cylinder, a tensioning guide rail, a tensioning seat, a second tensioning cylinder, and a tensioning sliding plate arranged in sequence from top to bottom. The first tensioning cylinder and the tensioning guide rail are linearly arranged on the frame. The first tensioning cylinder drives the tensioning seat to move along the tensioning guide rail. The second tensioning cylinder is arranged on the tensioning seat. The second tensioning cylinder drives the tensioning sliding plate to slide in the sliding groove of the tensioning seat. The pulley group includes a first pulley, a second pulley, and a third pulley. The first pulley is arranged outside the motor seat. The second pulley is arranged on the tensioning sliding plate. The third pulley is arranged on the top of the frame. The second pulley is located between the first pulley and the third pulley. The tensioning mechanism adjusts the length of the steel wire rope between the first pulley and the third pulley by driving the second pulley to tension the steel wire rope of the motor to be tested.

7. The motor load and self-locking force testing machine according to claim 6, characterized in that, At least one weight is fixed below the weight seat. Guide columns are arranged on both sides of the weight seat on the frame, and a jacking cylinder is arranged directly below the weight seat. The guide columns are fixed on the bottom plate of the frame. The bottom plate is provided with a rubber pad, and the rubber pad is located directly below the weight. The bottom of the jacking cylinder is fixed on the frame, and the upper part of the jacking cylinder extends to the lower surface of the weight seat.

8. Method for testing motor load and self-locking force, characterized in that, It is realized based on the testing machine described in claim 7. The motor to be tested is subjected to load and self-locking force tests by the testing machine. The testing method includes the following steps: Step 1: Fix the motor to be tested. The motor seat is preliminarily positioned with the motor to be tested through a positioning pin and a positioning groove. Rotate the pressing arm to the position of the motor to be tested, and the locking cylinder drives the pressing arm to clamp and fix the motor to be tested on the motor seat. Step 2: Hang the steel wire rope. Separate the two steel wire ropes of the motor to be tested. Each steel wire rope passes around the first pulley, the second pulley, and the third pulley in sequence, and then the rope head of the steel wire rope is clamped into the wire hanging groove. Close the baffle to clamp the rope head of the steel wire rope on the wire hanging board. Step 3: In the load test stage, the hook is clamped on the connecting plate by the hook detachment cylinder of the hook detachment assembly. The tensioning mechanism moves the second pulley to tension the steel wire rope. Power on the motor to be tested. The steel wire rope is retracted upward into the motor to be tested. The sum of the weights of the connecting plate and the weight seat driven upward by the steel wire rope is the load weight. Move upward a distance sensed and controlled by the sensor. The testing machine calculates the speed of the motor to be tested according to the time for moving this distance. Step 4, self-locking force test stage: The pressing cylinder moves to the rising path of the weight seat. The connecting plate and the weight seat move to the position of the pressing cylinder. The pressing cylinder applies a force to the connecting plate and the weight seat for the self-locking force test. During the self-locking force test, the motor under test is in a power-off state, and the steel wire rope inside it shall not loosen. Step 5, rope winding stage: The jacking cylinder extends upward to support the weight seat. The hook release cylinder of the hook release assembly on the weight seat extends to drive the hook away from the connecting plate. The motor under test is powered on. The steel wire rope winds the weight of the connecting plate into the motor under test with a certain length of the steel wire rope reserved outside the motor under test. At the same time, the jacking cylinder retracts to drive the weight seat to move downward and reset. Step 6, rope loosening stage: The motor under test is powered off. The lifting cylinder drives the lifting rod to lift the connecting plate to loosen the steel wire rope from the connecting plate, so that there is no connection force between the steel wire rope head and the wire hanging plate, realizing rope loosening. Step 7, move the baffle: Take out the steel wire rope head from the wire hanging groove. The locking cylinder drives the pressing arm to disengage from the motor under test, rotate the pressing arm to the outside of the motor under test, remove the motor under test from the motor seat, and the lifting cylinder drives the connecting plate to move downward and reset.

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