Linear motor reliability test device with multi-dimensional dynamic and static load simulation loading

Abstract

The application discloses a linear motor reliability test device with multi-dimensional dynamic and static load simulation loading, which comprises a ground plane, a non-motion direction loading part, a non-motion direction loading driving mechanism, an inertial load loading part, a test platform and a Y-axis direction contact type loading mechanism. The non-motion direction loading part comprises a non-motion direction loading frame and a loading mechanism stress body; two X-axis direction contact type loading mechanisms are symmetrically arranged on the two sides of the non-motion direction loading frame, and a Z-axis direction contact type loading mechanism is fixed above the non-motion direction loading frame; the loading ends of the X-axis direction contact type loading mechanisms and the Z-axis direction contact type loading mechanism are arranged in the non-motion direction loading frame and are in contact with the loading mechanism stress body; the three directions of dynamic and static force, inertial load, feeding speed and other multi-dimensional load conditions of the linear motor under actual working conditions can be effectively simulated, and the load conditions under different feeding speeds are simulated, so that potential faults of the tested linear motor can be effectively excited and exposed.

Description

Technical Field

[0001] This invention belongs to the field of motor reliability testing technology, specifically relating to a linear motor reliability testing device with multi-dimensional dynamic and static load simulation. Background Technology

[0002] Linear motors consist of a primary and a secondary winding, enabling linear motion and characterized by high thrust, high speed, and small size. Currently, linear motors are increasingly replacing complex ball screws in linear motion applications, finding widespread use in gantry systems, intelligent logistics, rail transportation, 3D printing, and many other fields. Before introducing a linear motor to the market, a crucial step is to conduct reliability testing. This involves simulating the loading conditions experienced by the linear motor under real-world operating conditions to recreate its actual working state. This helps to test the key performance characteristics of the linear motor, identify any defects, and improve its application.

[0003] Most current linear motor reliability testing devices can only load or test the linear motor in the direction of motion. For example, Chinese patent publication number CN108957321A uses a hydraulic cylinder as a drive to load the linear motor in the direction of motion and perform thrust testing on the linear motor. However, it does not simulate multi-dimensional dynamic and static loads on the linear motor, that is, it lacks loading in the non-motion direction of the linear motor and inertial loads, and cannot simulate the real stress situation of the linear motor under actual working conditions.

[0004] Some linear motor reliability testing devices, such as Chinese Patent Publication No. CN102288914A, use electromagnetic chucks to load the linear motor in the non-moving direction, which has limitations in the magnitude of the loading force; and it lacks the ability to load inertial loads, so it cannot load the linear motor with inertial loads by adding weights or other measures; in the moving direction of the linear motor, it uses a rotary motor as the drive and uses a steel wire rope to load it, which also has great limitations in the magnitude of the load, and the loading accuracy is poor. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems and to provide a linear motor reliability testing device with multi-dimensional dynamic and static load simulation.

[0006] A reliability testing device for linear motors with multi-dimensional dynamic and static load simulation includes: a ground rail 1, a non-motion direction loading section, a non-motion direction loading drive mechanism, an inertial load loading section, a test platform, and a Y-axis contact loading mechanism. The non-motion direction loading drive mechanism includes: a linear bearing, a guide shaft, a guide shaft support, a base, and a second servo motor 37; the base is fixed on the ground iron 1, and the non-motion direction loading part is fixed on the linear bearing and driven by the second servo motor 37 to reciprocate on the guide shaft; The non-motion direction loading part includes: a non-motion direction loading frame and a loading mechanism receiving body 4; two X-axis direction contact loading mechanisms are symmetrically arranged and fixed on both sides of the non-motion direction loading frame, and a Z-axis direction contact loading mechanism 3 is fixed above the non-motion direction loading frame; their loading ends are located inside the non-motion direction loading frame and are in contact with the loading mechanism receiving body 4. The test platform includes: an intermediate platform 56, a motor magnetic track 75, and a linear motor 74; the intermediate platform 56 is located within the non-motion direction loading frame and is fixed at both ends to the ground iron 1; the motor magnetic track 75 is mounted on the intermediate platform 56 as a stator, and the linear motor 74 is mounted on the motor magnetic track 75 as a mover; the inertial load loading part and the loading mechanism force-bearing body 4 are fixed on the linear motor 74. The Y-axis contact loading mechanism includes: a first servo motor 60, a first lead screw 65, and a first lead screw nut connector 66; a Y-axis contact loading mechanism tension / compression sensor 67 and a Y-axis contact loading mechanism piezoelectric ceramic actuator 68 are mounted on the first lead screw nut connector 66; the first lead screw 65 passes through the loading mechanism receiving body 4, and both ends are fixed to the ground level 1; the loading end of the Y-axis contact loading mechanism piezoelectric ceramic actuator 68 is in contact with the front end face of the loading mechanism receiving body 4. The non-motion direction loading frame is formed by connecting the Z-axis contact loading mechanism outer connecting plate 20, the X-axis first contact loading mechanism outer connecting plate 12, the X-axis second contact loading mechanism outer connecting plate and the loading support mechanism intermediate connecting plate 44 with bolts. The X-axis first contact loading mechanism includes: a lower connecting plate 6, a first side connecting plate 7, a washer 8, a fixing nut 9, an anti-loosening nut 10, a double-ended bolt 11, an outer connecting plate 12, a piezoelectric ceramic actuator 13, a tension / compression sensor 14, a movable slider 15, a threadless connecting slider 16, a threaded connecting slider 17, an intermediate spring 18, and a second side connecting plate 19. The frame of the X-axis first contact loading mechanism is formed by connecting the first side connecting plate 7, the outer connecting plate 12, the second side connecting plate 19, and the lower connecting plate 6, and is connected using bolts. The axis of the piezoelectric ceramic actuator 13 of the first contact loading mechanism in the X-axis direction is collinear with the axis of the circular hole in the middle of the outer connecting plate 12 of the first contact loading mechanism in the X-axis direction. The tension / compression sensor 14 of the first contact loading mechanism in the X-axis direction has bolts at both its upper and lower ends for connection. The piezoelectric ceramic actuator 13 of the first contact loading mechanism in the X-axis direction is connected to it via the connecting bolt at its upper end, and the movable slider 15 is connected to it via the connecting bolt at its lower end. The movable slider 15, the unthreaded connecting slider 16, and the threaded connecting slider 17 form a wedge-shaped structure. The unthreaded connecting slider 16 and the threaded connecting slider 17 are pressed against the connecting plates on both sides by the elastic force of the intermediate spring 18, and the movement of the connecting slider can be controlled by rotating the double-headed bolt 11. The Z-axis contact loading mechanism 3 and the X-axis second contact loading mechanism have the same structure as the X-axis first contact loading mechanism. The center position of the intermediate connecting plate 44 of the loading support mechanism is connected to the nut on the second lead screw 48 through the second lead screw nut connector 50; both sides are connected to the linear guide rail through the linear guide rail slider, the linear guide rail is fixed on the ground iron 1, the second servo motor 37 drives the second lead screw 48, and drives the loading frame to move in the non-movement direction. The inertial load loading section includes four inertial load loading mechanisms. Each inertial load loading mechanism includes an inertial load loading mechanism magnetic base 22 and several inertial load loading mechanism counterweights 21, which are connected by grooves and bosses. The loading ends of the piezoelectric ceramic actuators are all spherical. The loading mechanism has a groove on the force-receiving body 4, which corresponds to the spherical surface of the loading end of the piezoelectric ceramic actuator.

[0007] This invention provides a reliability testing device for a linear motor with multi-dimensional dynamic and static load simulation. It includes: a ground platform 1, a non-motion direction loading section, a non-motion direction loading drive mechanism, an inertial load loading section, a test platform, and a Y-axis contact loading mechanism. The non-motion direction loading section includes: a non-motion direction loading frame and a loading mechanism receiving body; two X-axis contact loading mechanisms are symmetrically arranged and fixed on both sides of the non-motion direction loading frame, and a Z-axis contact loading mechanism is fixed above the non-motion direction loading frame; their loading ends are located within the non-motion direction loading frame and are in contact with the loading mechanism receiving body.

[0008] Compared with the prior art, the beneficial effects of the present invention are: 1. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention can effectively simulate the multi-dimensional load conditions experienced by a linear motor under actual working conditions, including dynamic and static forces in three directions, inertial loads, and feed speeds. It can simulate the load conditions of the linear motor at different feed speeds, thereby effectively stimulating and exposing potential faults in the tested linear motor, improving the effectiveness of linear motor reliability testing, and contributing to the successful reliability analysis of the linear motor.

[0009] 2. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading described in this invention can not only apply dynamic and static forces to the linear motor in the direction of motion through the ball screw structure and piezoelectric ceramic actuator, but also apply dynamic and static forces to the non-motion direction of the linear motor through the piezoelectric ceramic actuator in the Z-axis contact loading mechanism and the X-axis contact loading mechanism, thereby realizing the simulation loading of dynamic and static forces on the linear motor in three directions.

[0010] 3. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention includes an inertial load loading device. Utilizing the structural characteristics of the magnetic base, weights are fixed to the linear motor, thereby enabling the loading of inertial loads. Furthermore, the number of weights can be changed according to actual needs, meeting more customer requirements.

[0011] 4. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention adopts follow-up contact loading, which can apply corresponding multi-dimensional dynamic and static loads to the linear motor while it is moving and feeding. It can also change the movement speed of the linear motor and load it at different feed speeds, so as to better simulate the actual load conditions and improve the test accuracy, reliability and service life. Attached Figure Description

[0012] Figure 1This is an isometric projection of the linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention; Figure 2 This is an axial projection (external) of the non-motion direction loading drive mechanism in the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading as described in this invention. Figure 3 This is the axial projection (internal) of the non-motion direction loading drive mechanism in the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading as described in this invention. Figure 4 This is an axial projection view of the test platform in the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading as described in this invention; Figure 5 This is a schematic diagram of the connection relationship of each loading mechanism in the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading of the present invention; Figure 6 This is a schematic diagram of the composition of the first contact loading mechanism in the X-axis direction of the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading as described in this invention. Figure 7 This is a schematic diagram of the composition of the inertial load loading mechanism in the linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading described in this invention; Figure 8 This is an axial projection view of the side support seat in the linear motor reliability test device with multi-dimensional dynamic and static load simulation loading described in this invention; Figure 9 This is a three-dimensional view of the load-bearing body 4 of the loading mechanism.

[0013] (In the diagram: 1. Ground leveling plate, 2. First contact loading mechanism in the X-axis direction, 3. Contact loading mechanism in the Z-axis direction, 4. Loading mechanism receiving body, 5. Inertial load loading mechanism, 6. Lower connecting plate, 7. First side connecting plate, 8. Washer, 9. Fixing nut, 10. Anti-loosening nut, 11. Double-ended bolt, 12. Outer connecting plate of the first contact loading mechanism in the X-axis direction, 13. Piezoelectric ceramic actuator of the first contact loading mechanism in the X-axis direction, 14. Tension / compression sensor of the first contact loading mechanism in the X-axis direction, 15. Moving slider, 16. Threadless connecting slider, 17. Threaded connecting slider, 18. Intermediate spring, 19. Second side connecting plate, 20. Outer connecting plate of the contact loading mechanism in the Z-axis direction, 21. Inertial load loading mechanism) 22. Counterweight of the loading mechanism; 23. Magnetic base of the inertial load loading mechanism; 24. Left linear bearing of the non-motion direction loading drive mechanism; 25. Left guide shaft of the non-motion direction loading drive mechanism; 26. First base of the non-motion direction loading drive mechanism; 27. First guide shaft support of the non-motion direction loading drive mechanism; 28. Upper connecting plate of the non-motion direction loading drive mechanism; 29. ​​Second base of the non-motion direction loading drive mechanism; 30. Second guide shaft support of the non-motion direction loading drive mechanism; 31. Right guide shaft of the non-motion direction loading drive mechanism; 32. Right linear bearing of the non-motion direction loading drive mechanism; 33. Third guide support of the non-motion direction loading drive mechanism; 34. Non-motion direction loading drive mechanism; 35. Front connecting plate of the motion direction loading drive mechanism; 36. Second servo motor connecting plate A; 37. Second servo motor connecting plate B; 38. Second servo motor; 39. Second servo motor connecting plate C; 40. Fourth base of the non-motion direction loading drive mechanism; 41. Fourth guide shaft support of the non-motion direction loading drive mechanism; 42. Lower connecting plate of the non-motion direction loading drive mechanism; 43. Left linear guide slider; 44. Left support seat; 45. Middle connecting plate of the non-motion direction loading drive mechanism; 46. Left linear guide; 47. Rear connecting plate of the non-motion direction loading drive mechanism; 48. Second lead screw support side support; 49. Second lead screw; 50. Right linear guide; 51. Second lead screw nut connector; 52. Right side support, 53. Right side linear guide slider, 54. Second coupling, 55. Second lead screw fixed side support, 56. Side support, 57. Intermediate platform, 58. First servo motor connecting plate A, 59. First servo motor connecting plate B, 60. T-type connector, 61. First servo motor, 62. First coupling, 63. First lead screw fixed side support, 64. Fixed side pad, 65. First servo motor connecting plate C, 66. First lead screw, 67. First lead screw nut connector, 68. Y-axis contact loading mechanism tension / compression sensor, 69. Y-axis contact loading mechanism piezoelectric ceramic actuator, 70. First lead screw support side support, 71. Support side pad, 72. Connecting plate A, 73.73. Connecting plate B; 74. Linear motor; 75. Motor magnetic track; 76. Second contact loading mechanism in the X-axis direction; 77. Second inertial load loading mechanism; 78. Third inertial load loading mechanism; 79. Fourth inertial load loading mechanism; 80. X-axis groove of the force-bearing body; 81. Y-axis groove of the force-bearing body. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings: See Figure 1-8 The linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention can conduct reliability tests on linear motors, simulate force loading under actual working conditions, and provide assistance in optimizing linear motors. The linear motor three-degree-of-freedom dynamic and static loading reliability testing device consists of a non-motion direction loading section, an inertial load loading section, a loading support section, and a test platform section.

[0015] I. Loading section in non-motion direction The non-motion direction loading part includes a first contact loading mechanism 2 in the X-axis direction, a contact loading mechanism 3 in the Z-axis direction, and a second contact loading mechanism 76 in the X-axis direction.

[0016] The X-axis first contact loading mechanism 2 and the X-axis second contact loading mechanism 76 are two structurally identical mechanisms, symmetrically arranged on both sides of the loading mechanism's load-bearing body 4, with the outer connecting plate 12 of the X-axis first contact loading mechanism closer to the load-bearing body 4. Except for the outer connecting plate 20, all other components of the Z-axis contact loading mechanism 3 have the same mechanical structure and connection method as the X-axis first contact loading mechanism 2. The Z-axis contact loading mechanism 3 is located at the top of the loading mechanism's load-bearing body 4, with the outer connecting plate 20 closer to the load-bearing body 4. The outer connecting plate 20, the outer connecting plate 12, and the outer connecting plate 20 of the Z-axis contact loading mechanism are connected to the intermediate connecting plate 44 of the non-motion direction loading drive mechanism using bolts, forming a non-motion direction loading frame, which is fixed in position by the intermediate connecting plate 44 of the non-motion direction loading drive mechanism.

[0017] The X-axis first contact loading mechanism includes: a lower connecting plate 6, a first side connecting plate 7, a washer 8, a fixing nut 9, a lock nut 10, a double-ended bolt 11, an outer connecting plate 12, a piezoelectric ceramic actuator 13, a tension / compression sensor 14, a movable slider 15, a threadless connecting slider 16, a threaded connecting slider 17, a central spring 18, and a second side connecting plate 19. The frame of the X-axis first contact loading mechanism is formed by connecting the first side connecting plate 7, the outer connecting plate 12, the second side connecting plate 19, and the lower connecting plate 6, and is connected by bolts. The axis of the piezoelectric ceramic actuator 13 is collinear with the axis of the circular hole in the middle of the outer connecting plate 12. The X-axis first contact loading mechanism tension / compression sensor 14 has bolts at both its upper and lower ends for connection. The X-axis first contact loading mechanism piezoelectric ceramic actuator 13 is connected to it via the connecting bolt at its upper end, and the moving slider 15 is connected to it via the connecting bolt at its lower end. The moving slider 15, the unthreaded connecting slider 16, and the threaded connecting slider 17 form a wedge structure. The unthreaded connecting slider 16 and the threaded connecting slider 17 are pressed against the connecting plates on both sides by the elastic force of the intermediate spring 18, and the movement of the connecting slider can be controlled by rotating the double-ended bolt 11.

[0018] The main technical requirements for sensor 14 in the first contact loading mechanism in the X-axis direction are as follows: 1) The full-load measurement deformation of the tension / compression sensor in the first contact loading mechanism in the X-axis direction should be less than 0.01 mm. 2) The comprehensive error range of the tension / compression sensor in the first contact loading mechanism in the X-axis direction is ±0.05 (%RO). 3) The measurement range of the tension / compression sensor in the first contact loading mechanism in the X-axis direction is 0N~XN, that is, the minimum measurement value is 0N, and the maximum measurement value is XN. X must be greater than the maximum value required by the user, and a safety factor required by the user must be included. For example, if the user specifies a safety factor of 150% and requires a maximum load value of 1000N, then the range of the selected tension / compression sensor should be 0N~1500N.

[0019] The X-axis first contact loading mechanism tension and compression sensor 14 has threads at both ends for connection. The upper end is connected to the X-axis first contact loading mechanism piezoelectric ceramic actuator 13, and the lower end is connected to the connecting slider 15.

[0020] Requirements for the piezoelectric ceramic actuator 13 of the first contact loading mechanism in the X-axis direction: 1) While meeting the user's loading requirements, a piezoelectric ceramic actuator of suitable length can be selected according to the user's needs. 2) The piezoelectric ceramic actuator has a corresponding controller, which can control the loading force of the piezoelectric ceramic actuator by controlling the magnitude of the input current. The accuracy of the control current is determined according to the accuracy of the loading force required by the user.

[0021] The main parameters of the piezoelectric ceramic actuator are: 1) Maximum loading force; 2) Maximum / nominal stroke; 3) Resonant frequency.

[0022] The bottom of the piezoelectric ceramic actuator of the first contact loading mechanism in the X-axis direction has a threaded hole for connection, which can be connected to the upper bolt of the tension and compression sensor of the first contact loading mechanism in the X-axis direction to achieve closed-loop control and meet the requirements of dynamic and precise loading.

[0023] II. Inertial Loading Section The inertial load loading section includes a first inertial load loading mechanism 5, a second inertial load loading mechanism 77, a third inertial load loading mechanism 78, and a fourth inertial load loading mechanism 79. These four inertial load loading mechanisms have identical mechanical structures.

[0024] See Figure 4The first inertial load loading mechanism consists of an inertial load loading mechanism counterweight 21 and an inertial load loading mechanism magnetic base 22. The inertial load loading mechanism counterweight 21 is made of magnetically conductive material and has four grooves at its lower end, which can engage with four protrusions on the upper surface of the inertial load loading mechanism magnetic base 22. Simultaneously, the upper surface of the inertial load loading mechanism counterweight 21 also has four protrusions, which can connect to the next inertial load loading mechanism counterweight, thereby changing the magnitude of the inertial load applied to the linear motor to meet more customer needs. The inertial load loading mechanism counterweight 21 is firmly placed on the inertial load loading mechanism magnetic base 22 by utilizing its adsorption force. The lower base plate of the inertial load loading mechanism magnetic base 22 is made of non-magnetically conductive material and is used to connect the inertial load loading mechanism magnetic base 22 to the linear motor 74. The upper shell of the magnetic base 22 of the inertial load loading mechanism consists of two magnetic conductors and a copper plate. The copper plate is positioned in the middle of the magnetic conductors. Bosses with threaded holes are designed on both sides of the magnetic conductors to connect with the lower base plate of the magnetic base 22. Inside the magnetic base 22, there is also a permanent magnet. When the external knob of the magnetic base 22 is turned to the horizontal position, the internal permanent magnet is rotated so that its N and S poles are directly opposite the magnetic conductors. The magnetic lines of force flow from the N pole to the magnetic conductor, then to the guide rail, to the other magnetic conductor, and finally to the S pole, forming a closed loop. This allows the counterweight 21 of the inertial load loading mechanism to be firmly attached to the magnetic base 22. When the external knob is turned to the vertical position, the permanent magnet is rotated to the middle position, meaning its diameter is not directly opposite the magnetic conductors. The magnetic lines of force form closed loops between the two magnetic conductors, and the magnetic base has no attractive force in this position.

[0025] III. Non-motion direction loading drive mechanism 1. External mechanism of non-motion direction loading drive mechanism The external mechanism of the non-motion direction loading drive mechanism includes: a ground rail 1, a left linear bearing 23 of the non-motion direction loading drive mechanism, a left guide shaft 24 of the non-motion direction loading drive mechanism, a first base 25 of the non-motion direction loading drive mechanism, a first guide shaft support 26 of the non-motion direction loading drive mechanism, an upper connecting plate 27 of the non-motion direction loading drive mechanism, a second base 28 of the non-motion direction loading drive mechanism, a second guide shaft support 29 of the non-motion direction loading drive mechanism, a right guide shaft 30 of the non-motion direction loading drive mechanism, a right linear bearing 31 of the non-motion direction loading drive mechanism, a third guide support 32 of the non-motion direction loading drive mechanism, a third base 33 of the non-motion direction loading drive mechanism, a front connecting plate 34 of the non-motion direction loading drive mechanism, a fourth base 39 of the non-motion direction loading drive mechanism, a fourth guide shaft support 40 of the non-motion direction loading drive mechanism, a lower connecting plate 41 of the non-motion direction loading drive mechanism, and a rear connecting plate 46 of the non-motion direction loading drive mechanism.

[0026] The first base 25, second base 28, third base 33, and fourth base 39 of the non-motion direction loading drive mechanism are four structurally identical parts. Similarly, the first guide shaft support 26, second guide shaft support 29, third guide shaft support 32, and fourth guide shaft support 40 of the non-motion direction loading drive mechanism are also four structurally identical parts. The left guide shaft 24 and right guide shaft 30 of the non-motion direction loading drive mechanism are two structurally identical parts. The left linear bearing 23 and right linear bearing 31 of the non-motion direction loading drive mechanism are also two structurally identical parts.

[0027] Four non-motion direction loading drive mechanism bases are symmetrically arranged on both sides of the non-motion direction loading drive mechanism. The first base 25 of the non-motion direction loading drive mechanism has U-shaped grooves on both sides, and is fixedly connected to the ground iron 1 using T-bolts. Two threaded holes are designed on the upper end face for connecting the first guide shaft support 26 of the non-motion direction loading drive mechanism. The first guide shaft support 26 and the fourth guide shaft support 40 of the non-motion direction loading drive mechanism are used to connect the left guide shaft 24 of the non-motion direction loading drive mechanism. The left linear bearing 23 of the non-motion direction loading drive mechanism is installed on the left guide shaft 24 of the non-motion direction loading drive mechanism and is connected to the side support 55 using bolts. The connection method of the linear bearing and side support on the right guide shaft 30 of the non-motion direction loading drive mechanism is the same as the connection method of the parts on the left guide shaft 24 of the non-motion direction loading drive mechanism, and they are symmetrically arranged on both sides of the non-motion direction loading drive mechanism to ensure that the two guide shafts are parallel to each other.

[0028] The frame of the non-motion direction loading drive mechanism is composed of an upper connecting plate 27, a front connecting plate 34, a lower connecting plate 41, and a rear connecting plate 46 connected by bolts. The side support 55 connected to the left guide shaft 24 of the non-motion direction loading drive mechanism is bolted to the outer connecting plate 12 of the first contact loading mechanism in the X-axis direction. This connection ensures greater stability of the first contact loading mechanism in the X-axis direction after installation, guaranteeing loading even when the linear motor is in motion. The connection method on the right side of the non-motion direction loading drive mechanism is the same as on the left.

[0029] 2. Internal mechanisms of the non-motion direction loading drive mechanism The internal structure of the non-motion direction loading drive mechanism includes: second servo motor connecting plate A35, second servo motor connecting plate B36, second servo motor 37, second servo motor connecting plate C38, left linear guide slider 42, left support seat 43, intermediate connecting plate 44 of the non-motion direction loading drive mechanism, left linear guide 45, second lead screw support side support 47, second lead screw 48, right linear guide 49, second lead screw nut connector 50, right support seat 51, right linear guide slider 52, second coupling 53, and second lead screw fixed side support 54.

[0030] The linear guide rails, linear guide rail sliders, and support seats arranged on both sides of the non-motion direction loading drive mechanism are two sets of components with identical mechanical structures and connection methods. The left linear guide rail 45 is fixed to the lower connecting plate 41 of the non-motion direction loading drive mechanism with bolts. The left linear guide rail slider 42 is provided with four threaded holes for connection, which are used to connect with the left support seat 43. The middle connecting plate 44 of the non-motion direction loading drive mechanism is connected to the left support seat 43 and the right support seat 51 with bolts respectively.

[0031] The second servo motor 37 is mounted on the front connecting plate 34 of the non-motion direction loading drive mechanism via second servo motor connecting plates A35, B36, and C38. The second servo motor 37 is connected to the second lead screw 48 via a second coupling 53. The second lead screw 48 is mounted on the side connecting plate of the non-motion direction loading drive mechanism via a second lead screw fixed side support 54 and a second lead screw support side support 47. The second lead screw nut connector 50 on the second lead screw 48 is connected to the intermediate connecting plate 44 of the non-motion direction loading drive mechanism via bolts. The second lead screw is mainly used to control the movement of the non-motion direction loading part, ensuring that loading can be applied even when the linear motor is in motion.

[0032] III. Testing Platform The test platform framework includes an intermediate platform 56, a first servo motor connecting plate A57, a first servo motor connecting plate B58, a first servo motor connecting plate C64, a connecting plate A71, a connecting plate B72, a connecting plate C73, a linear motor 74, and a motor magnetic track 75.

[0033] The intermediate platform 56 is bolted to the connecting plate 27 of the non-motion direction loading drive mechanism. The motor magnetic rail 75 is also bolted to the intermediate platform 56, serving as the stator of the linear motor, while the linear motor 74 acts as the mover, moving on the motor magnetic rail 75. The first servo motor connecting plates A57, B58, and C64 are bolted together and arranged on the intermediate platform 56, serving to connect the first servo motor 60 and the first lead screw fixed side support 62. Connecting plates A71, B72, and C73 are also bolted together and arranged on the intermediate platform 56, serving to connect the first lead screw support side support 69.

[0034] V. Contact loading mechanism in the Y-axis direction See Figure 8The Y-axis contact loading mechanism includes: a T-type connector 59, a first servo motor 60, a first coupling 61, a first lead screw fixed side support 62, a fixed side pad 63, a first lead screw 65, a first lead screw nut connector 66, a Y-axis contact loading mechanism tension and compression sensor 67, a Y-axis contact loading mechanism piezoelectric ceramic actuator 68, a first lead screw support side support 69, and a support side pad 70.

[0035] The first servo motor 60 is mounted on the first servo motor connecting plate B58 via a T-shaped connector 59. The first servo motor 60 is connected to the first lead screw 65 via a first coupling 61. The first lead screw 65 is mounted on the first lead screw fixed side support 62 and the first lead screw support side support 69. To adjust the height of the first lead screw, a fixed side pad 63 and a support side pad 70 are also designed. Customers can modify these parameters according to actual needs. The Y-axis contact loading mechanism tension and compression sensor 67 is connected to the first lead screw nut connector 66 via bolts. At the same time, the Y-axis contact loading mechanism piezoelectric ceramic actuator 68 is connected to the Y-axis contact loading mechanism tension and compression sensor 67. The loading end of the Y-axis contact loading mechanism piezoelectric ceramic actuator 68 contacts the Y-axis groove 81 on the surface of the loading mechanism force-bearing body 4, thereby realizing the dynamic and static force loading in the direction of linear motor motion.

[0036] Working principle of a linear motor reliability testing device with multi-dimensional dynamic and static load simulation: See Figure 1 During reliability testing of the linear motor, the first lead screw is primarily used to apply load in the direction of motion to the linear motor, while the second lead screw is mainly used to drive the non-motion direction loading part. In the non-motion direction loading part, the loading ends of the first contact loading mechanism piezoelectric ceramic actuators in the X-axis direction, the second contact loading mechanism piezoelectric ceramic actuators in the X-axis direction, and the contact loading mechanism piezoelectric ceramic actuators in the Z-axis direction are all spherical, and are respectively connected to the X-axis groove 80 and the Z-axis groove on the surface of the loading mechanism receiving body 4. The loading end of the contact loading mechanism piezoelectric ceramic actuator in the Y-axis direction is also spherical and is connected to the front end face of the loading mechanism receiving body 4. The loading mechanism receiving body 4 is connected to the linear motor 74 by bolts. During the test, the second lead screw moves at the same speed as the linear motor, while the first lead screw has a speed difference with the linear motor. The magnitude of this speed difference depends on the direction of motion of the linear motor. Maintaining this speed difference is to preload the Y-axis contact loading mechanism piezoelectric ceramic actuator, thereby ensuring the accuracy of the loading.

[0037] The linear motor reliability testing device with multi-dimensional dynamic and static load simulation described in this invention allows for the setting of the loading force and inertial load magnitude according to the actual working conditions to be simulated when conducting reliability tests on linear motors. The testing device is then installed and the loading test is performed.

[0038] This invention is only applicable to reliability testing of linear motors of different models and sizes within a certain range. For reliability testing of linear motors of different models and sizes outside this range, the basic technical solution remains the same, but the specifications and models of the components used will also change accordingly. Therefore, this invention is not limited to the description of this specific technical solution. If those skilled in the art make equivalent structural changes or modifications without creative effort while adhering to the basic technical solution of this invention, these modifications are all within the protection scope of this invention.

Claims

1. A reliability testing device for linear motors with multi-dimensional dynamic and static load simulation, comprising: Horizontal rail (1), non-motion direction loading part, non-motion direction loading drive mechanism, inertial load loading part, test platform and Y-axis direction contact loading mechanism: The non-motion direction loading drive mechanism includes: a linear bearing, a guide shaft, a guide shaft support, a base, and a second servo motor (37); the base is fixed on the ground iron (1), and the non-motion direction loading part is fixed on the linear bearing and driven by the second servo motor (37) to reciprocate on the guide shaft; The non-motion direction loading part includes: a non-motion direction loading frame and a loading mechanism receiving body (4); two X-axis direction contact loading mechanisms are symmetrically arranged and fixed on both sides of the non-motion direction loading frame, and a Z-axis direction contact loading mechanism (3) is fixed above the non-motion direction loading frame; their loading ends are located inside the non-motion direction loading frame and are in contact with the loading mechanism receiving body (4); The test platform includes: an intermediate platform (56), a motor magnetic track (75), and a linear motor (74); the intermediate platform (56) is located in the non-motion direction loading frame and is fixed at both ends on the ground iron (1); the motor magnetic track (75) is installed on the intermediate platform (56) as a stator; and the linear motor (74) is installed on the motor magnetic track (75) as a mover; the inertial load loading part and the loading mechanism force-bearing body (4) are fixed on the linear motor (74).

2. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 1, characterized in that: The Y-axis contact loading mechanism includes: a first servo motor (60), a first lead screw (65), and a first lead screw nut connector (66); a Y-axis contact loading mechanism tension and compression sensor (67) and a Y-axis contact loading mechanism piezoelectric ceramic actuator (68) are mounted on the first lead screw nut connector (66); the first lead screw (65) passes through the loading mechanism force-bearing body (4) and is fixed at both ends to the ground iron (1); the loading end of the Y-axis contact loading mechanism piezoelectric ceramic actuator (68) is in contact with the front end face of the loading mechanism force-bearing body (4).

3. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 2, characterized in that: The non-motion direction loading frame is formed by connecting the Z-axis contact loading mechanism outer connecting plate (20), the X-axis first contact loading mechanism outer connecting plate (12), the X-axis second contact loading mechanism outer connecting plate and the loading support mechanism intermediate connecting plate (44) with bolts. The X-axis first contact loading mechanism includes: a lower connecting plate (6), a first side connecting plate (7), a washer (8), a fixing nut (9), a lock nut (10), a double-ended bolt (11), an outer connecting plate (12) for the X-axis first contact loading mechanism, a piezoelectric ceramic actuator (13) for the X-axis first contact loading mechanism, a tension / compression sensor (14) for the X-axis first contact loading mechanism, a moving slider (15), a threadless connecting slider (16), a threaded connecting slider (17), an intermediate spring (18), and a second side connecting plate (19); the frame of the X-axis first contact loading mechanism consists of the first side connecting plate (7), the X-axis... The first contact loading mechanism is connected by an outer connecting plate (12), a second side connecting plate (19), and a lower connecting plate (6), and is connected by bolts. The axis of the piezoelectric ceramic actuator (13) of the first contact loading mechanism in the X-axis direction is collinear with the axis of the circular hole in the middle of the outer connecting plate (12) of the first contact loading mechanism in the X-axis direction. The tension and compression sensor (14) of the first contact loading mechanism in the X-axis direction is designed with bolts for connection at both the upper and lower ends. The piezoelectric ceramic actuator (13) of the first contact loading mechanism in the X-axis direction is connected to it through the connecting bolt at its upper end, and the moving slider (15) is connected to it through the connecting bolt at its lower end. The movable slider (15) forms a wedge structure with the unthreaded connecting slider (16) and the threaded connecting slider (17). The unthreaded connecting slider (16) and the threaded connecting slider (17) are pressed against the connecting plates on both sides by the elastic force of the intermediate spring (18), and the connecting slider can be moved by controlling the rotation of the double-headed bolt (11). The Z-axis contact loading mechanism (3) and the X-axis second contact loading mechanism have the same structure as the X-axis first contact loading mechanism.

4. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 3, characterized in that: The center position of the intermediate connecting plate (44) of the loading support mechanism is connected to the nut on the second lead screw (48) through the second lead screw nut connector (50); the two sides are connected to the linear guide rail through the linear guide rail slider, the linear guide rail is fixed on the ground iron (1), the second servo motor (37) drives the second lead screw (48) to drive the non-motion direction loading frame to move.

5. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 4, characterized in that: The inertial load loading section includes four inertial load loading mechanisms. Each inertial load loading mechanism includes an inertial load loading mechanism magnetic base (22) and several inertial load loading mechanism counterweights (21), which are connected by grooves and bosses.

6. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 5, characterized in that: The loading ends of the piezoelectric ceramic actuators are all spherical.

7. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 6, characterized in that: The loading mechanism has a groove on the force-receiving body (4), which corresponds to the spherical surface of the loading end of the piezoelectric ceramic actuator.

8. The linear motor reliability testing device with multi-dimensional dynamic and static load simulation loading according to claim 7, characterized in that: The second lead screw moves at the same speed as the linear motor, while there is a speed difference between the first lead screw and the linear motor.

Images