Self-adaptive fatigue test system suitable for magnetic axis linear motor

Abstract

The invention discloses a self-adaptive fatigue test system suitable for a magnetic axis linear motor, and relates to the technical field of fatigue test of magnetic axis linear motors. The device comprises a bottom plate seat, a main guide rod, a self-adaptive load adjusting sliding rod, a supporting electric cylinder, an adjusting table, a load mounting table and a magnetic axis linear motor fixing seat. A balancing weight and a load adjusting tension spring are combined to form a basic load, and real-time adjustment of the load is achieved through a planetary gear mechanism driven by a main adjusting motor and an auxiliary adjusting motor. The system is provided with first and second sliding resistance distance measuring rods for monitoring displacement and load states, and the supporting electric cylinder can adjust the mounting height of the motor. The load can be adjusted in real time in the testing process, the accuracy and reliability of motor fatigue testing are guaranteed, the dual-motor redundancy and anti-reverse transmission design is achieved, operation is safe and stable, and the motor fatigue testing device is suitable for multi-working-condition simulation testing.

Description

Technical Field

[0001] This invention relates to the field of fatigue testing technology for magnetic shaft linear motors, specifically to an adaptive fatigue testing system suitable for magnetic shaft linear motors. Background Technology

[0002] Most existing fatigue testing systems for magnetic shaft linear motors use fixed counterweights or a single tension spring as the loading method, simulating fatigue conditions by driving the actuator rod to reciprocate through a motor. These traditional structures have the following drawbacks: First, the load adjustment method is singular, usually relying on manual counterweight replacement, making dynamic adjustment during testing impossible, resulting in low testing efficiency and difficulty in adaptively simulating load changes at different stages of actual application. Second, the load adjustment mechanism in traditional structures is typically driven by a single motor; if the motor fails, the entire system collapses, leading to poor reliability. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: an adaptive fatigue testing system for a magnetic shaft linear motor, comprising a base plate, on which two parallel main guide rods are fixedly mounted, positioned diagonally opposite each other; two adaptive load adjusting sliding rods, parallel to the main guide rods, are rotatably mounted at the focusing position on the base plate, with their bottom ends extending to the bottom of the base plate, and driven to rotate by a control unit; a support cylinder is fixedly mounted at the center of the upper surface of the base plate, with a support seat fixedly mounted at the end of the telescopic rod of the support cylinder, the support seat being slidably mounted on all the main guide rods and adaptive load adjusting sliding rods; an adjustment platform, parallel to the support seat, is also provided above the support seat, slidably mounted on all the main guide rods and adaptive load adjusting sliding rods; and a load mounting platform, parallel to the adjustment platform, is provided above the adjustment platform, slidably mounted on all the main guide rods and adaptive load adjusting sliding rods.

[0004] Preferably, a counterweight is fixedly installed on the load mounting platform in a manner that facilitates disassembly; a magnetic shaft linear motor mounting base is fixedly installed in the middle of the upper surface of the adjusting platform, and a magnetic shaft linear motor is fixedly installed on the magnetic shaft linear motor mounting base. The top end of the actuator rod of the magnetic shaft linear motor is fixedly engaged with the center position of the lower surface of the load mounting platform in a manner that facilitates disassembly, and the bottom end of the actuator rod of the magnetic shaft linear motor is slidably inserted into the magnetic shaft linear motor mounting base.

[0005] Preferably, four support springs are provided between the opposing surfaces of the support base and the adjustment platform. The four support springs are respectively wrapped around all the main guide rods and the adaptive load adjustment sliding rod, and the two ends of the support springs are respectively fixedly engaged with the adjustment platform and the support base.

[0006] Preferably, a limiting sleeve is fitted on the outer side of each of the two adaptive load adjusting sliding rods, and the two limiting sleeves are fixedly installed on the adjusting platform; a limiting sleeve spline groove is opened on the inner side of the limiting sleeve, and a nut sliding block fitted on the adaptive load adjusting sliding rod is slidably installed in the limiting sleeve spline groove in a spline manner, and the middle part of the adaptive load adjusting sliding rod is provided with a thread that can engage with the threaded drive of the nut sliding block; a load adjusting tension spring is also fitted around each adaptive load adjusting sliding rod, and the two ends of the load adjusting tension spring are fixedly connected to the load mounting platform and the nut sliding block, respectively.

[0007] Preferably, the control unit includes a base housing for fixing the base plate seat, and two intermediate horizontal plates and a bottom horizontal plate are fixedly installed on the inner wall of the base housing, which are parallel to the base plate seat, wherein the intermediate horizontal plates are disposed between the base plate seat and the bottom horizontal plates.

[0008] Preferably, each adaptive load adjusting sliding rod has a driven gear fixedly installed at one end below the base plate. The two driven gears are driven by a driving gear disk that is rotated and installed on the lower surface of the base plate. A planetary drive disk is fixedly installed on the driving gear disk. A central gear is rotatably mounted at the center of the lower surface of the planetary drive disk. An outer gear ring is coaxially provided on the outer side of the central gear. The outer gear ring and the central gear are driven by three planetary gears. All three planetary gears are rotatably mounted on the planetary drive disk.

[0009] Preferably, the planetary drive disk is rotatably mounted on the middle horizontal plate, and the outer toothed ring is rotatably mounted between the middle horizontal plate and the bottom horizontal plate.

[0010] Preferably, a main regulating motor and an auxiliary regulating motor are fixedly installed on the lower surface of the bottom horizontal plate, wherein the output shaft of the auxiliary regulating motor is connected to the outer gear ring via a transmission belt, and the output shaft of the main regulating motor is fixedly connected to the central gear.

[0011] Preferably, a first sliding resistance measuring rod is provided between the support base and the adjusting platform, and a second sliding resistance measuring rod is provided between the adjusting platform and the load mounting platform. The first sliding resistance measuring rod is used to detect the distance between the adjusting platform and the support base, and the second sliding resistance measuring rod is used to detect the distance between the adjusting platform and the load mounting platform. The working principle of the first and second sliding resistance measuring rods is the same. Here, the first sliding resistance measuring rod is used as an example. One end of the first sliding resistance measuring rod is electrically slidably connected to the adjusting platform, and the other end of the first sliding resistance measuring rod is fixed to the support base. When the distance between the adjusting platform and the support base changes, the adjusting platform will slide relative to the first sliding resistance measuring rod. At this time, it is only necessary to measure the resistance value at the connection between the adjusting platform and the first sliding resistance measuring rod and the connection between the first sliding resistance measuring rod and the support base to obtain the distance between the adjusting platform and the support base.

[0012] Compared with the prior art, the present invention has the following advantages: (1) The present invention achieves continuous adjustment of the load mounting platform through a planetary gear transmission structure driven by the main adjustment motor and the auxiliary adjustment motor. During the test, there is no need to stop the machine to change the counterweight, and the preload and force state of the tension spring can be changed in real time, thereby dynamically simulating the load of the magnetic shaft linear motor under different working conditions, which greatly improves the flexibility and efficiency of the test; (2) The present invention monitors the distance changes between the support base and the adjustment platform, and between the adjustment platform and the load mounting platform by setting the first sliding resistance measuring rod and the second sliding resistance measuring rod, respectively, thereby achieving dual monitoring of the displacement and loading state of the motor actuator. This redundant detection method significantly improves the accuracy of data acquisition and the reliability of the system, and helps to better judge the performance changes of the motor during the fatigue test; (3) The present invention adopts a dual-drive redundant structure of the main adjustment motor and the auxiliary adjustment motor, and introduces a worm gear mechanism in the transmission path to prevent the reverse force of the external load from being transmitted to the motor. Even if one of the motors fails, the other motor can still maintain the load adjustment function, thereby ensuring the stable operation of the system during long-term testing and significantly improving reliability and safety; (4) The system of the present invention uses an easy-to-disassemble method to install the counterweight and magnetic shaft linear motor. The support cylinder can flexibly adjust the position of the motor mounting base. Combined with the synergistic effect of the limiting sleeve and spline nut, it is easy to quickly replace the test motor or adjust the load, greatly reducing the debugging time and operation difficulty. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the base housing of the present invention.

[0015] Figure 3 This is a schematic diagram of the limiting sleeve structure of the present invention.

[0016] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0017] Figure 5 This is a schematic diagram of the control unit structure of the present invention.

[0018] In the diagram: 101-Main guide rod; 102-Magnetic shaft linear motor mounting base; 103-Magnetic shaft linear motor; 104-Load mounting platform; 105-Counterweight block; 106-First sliding resistance distance measuring rod; 107-Second sliding resistance distance measuring rod; 108-Adjustment platform; 109-Adaptive load adjustment sliding rod; 110-Load adjustment tension spring; 111-Limiting sleeve; 112-Support spring; 113-Support base; 114-Support electric cylinder; 115-Base plate; 116-Intermediate horizontal plate; 117-Bottom horizontal plate; 118-Base housing; 119-Main adjustment motor; 120-Auxiliary adjustment motor; 121-Limiting sleeve spline groove; 122-Nut sliding block; 123-Driven gear; 124-Driving gear disc; 125-Planetary drive disc; 126-Transmission belt; 127-Outer gear ring; 128-Planetary gear; 129-Center gear. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-5 The technical solution of the present invention will be further illustrated through specific embodiments.

[0020] This invention provides an adaptive fatigue testing system for magnetic shaft linear motors, comprising a base plate 115, on which two parallel main guide rods 101 are fixedly mounted, positioned diagonally opposite each other. Two adaptive load adjusting sliding rods 109, parallel to the main guide rods 101, are also rotatably mounted at a focusing position on the base plate 115. The bottom ends of the two adaptive load adjusting sliding rods 109 extend below the base plate 115, and are driven to rotate by a control unit. A fixed mounting plate is also installed at the center of the upper surface of the base plate 115. A support cylinder 114 is provided, and a support base 113 is fixedly installed at the end of the telescopic rod of the support cylinder 114. The support base 113 is slidably installed on all the main guide rods 101 and the adaptive load adjusting sliding rod 109. An adjustment platform 108 parallel to the support base 113 is also provided above the support base 113. The adjustment platform 108 is slidably installed on all the main guide rods 101 and the adaptive load adjusting sliding rod 109. A load mounting platform 104 parallel to the adjustment platform 108 is provided above the adjustment platform 108. The load mounting platform 104 is slidably installed on all the main guide rods 101 and the adaptive load adjusting sliding rod 109. A counterweight 105 is fixedly mounted on the load mounting platform 104 in a manner that facilitates disassembly. A magnetic shaft linear motor mounting base 102 is fixedly mounted in the middle of the upper surface of the adjusting platform 108. A magnetic shaft linear motor 103 is fixedly mounted on the magnetic shaft linear motor mounting base 102. The top end of the actuator rod of the magnetic shaft linear motor 103 is fixedly engaged with the center position of the lower surface of the load mounting platform 104 in a manner that facilitates disassembly. The bottom end of the actuator rod of the magnetic shaft linear motor 103 slides into the magnetic shaft linear motor mounting base 102. Four support springs 112 are provided between the opposing surfaces of the support base 113 and the adjusting platform 108. The four support springs 112 respectively surround all the main guide rods 101 and the adaptive load adjustment sliding rod 109, and both ends of the support springs 112 are fixedly engaged with the adjusting platform 108 and the support base 113, respectively. Each of the two adaptive load adjusting sliding rods 109 is fitted with a limiting sleeve 111 on its outer side, and the two limiting sleeves 111 are fixedly installed on the adjusting platform 108. The inner side of the limiting sleeve 111 is provided with a limiting sleeve spline groove 121, and a nut sliding block 122 fitted on the adaptive load adjusting sliding rod 109 is slidably installed in the limiting sleeve spline groove 121 in a spline manner. The middle part of the adaptive load adjusting sliding rod 109 is provided with a thread that can engage with the nut sliding block 122. Each adaptive load adjusting sliding rod 109 is also surrounded by a load adjusting tension spring 110, and the two ends of the load adjusting tension spring 110 are fixedly connected to the load mounting platform 104 and the nut sliding block 122, respectively.

[0021] The control unit includes a base housing 118 for fixing the base plate 115. Two intermediate horizontal plates 116 and a bottom horizontal plate 117, parallel to the base plate 115, are fixedly installed on the inner wall of the base housing 118, with the intermediate horizontal plates 116 positioned between the base plate 115 and the bottom horizontal plates 117. A driven gear 123 is fixedly installed at one end of each adaptive load adjusting sliding rod 109 located below the base plate 115. The two driven gears 123 mesh with a drive gear 124 rotatably mounted on the lower surface of the base plate 115. A planetary drive disk 125 is coaxially fixedly mounted on the drive gear 124. A central gear 129 is rotatably mounted at the center of the lower surface of the planetary drive disk 125. An outer gear ring 127 is coaxially mounted on the outer side of the central gear 129. The outer gear ring 127 meshes with the central gear 129 through three planetary gears 128, all of which are rotatably mounted on the planetary drive disk 125. The planetary drive disk 125 is rotatably mounted on the middle horizontal plate 116, and the outer gear ring 127 is rotatably mounted between the middle horizontal plate 116 and the bottom horizontal plate 117. A main adjusting motor 119 and an auxiliary adjusting motor 120 are fixedly mounted on the lower surface of the bottom horizontal plate 117. The output shaft of the auxiliary adjusting motor 120 is connected to the outer gear ring 127 via a transmission belt 126, and the output shaft of the main adjusting motor 119 is fixedly connected to the central gear 129. A first sliding resistance measuring rod 106 is provided between the support base 113 and the adjusting platform 108, and a second sliding resistance measuring rod 107 is provided between the adjusting platform 108 and the load mounting platform 104. The first sliding resistance measuring rod 106 is used to detect the distance between the adjusting platform 108 and the support base 113, and the second sliding resistance measuring rod 107 is used to detect the distance between the adjusting platform 108 and the load mounting platform 104. The working principle of the first sliding resistance measuring rod 106 and the second sliding resistance measuring rod 107 is the same. Here, we take the first sliding resistance measuring rod 106 as an example. One end of the first sliding resistance measuring rod 106 is electrically and slidably connected to the adjustment platform 108, and the other end of the first sliding resistance measuring rod 106 is fixed on the support base 113. When the distance between the adjustment platform 108 and the support base 113 changes, the adjustment platform 108 will slide relative to the first sliding resistance measuring rod 106. At this time, it is only necessary to measure the resistance value at the connection between the adjustment platform 108 and the first sliding resistance measuring rod 106 and the connection between the first sliding resistance measuring rod 106 and the support base 113 to obtain the distance between the adjustment platform 108 and the support base 113.

[0022] The working principle of the adaptive fatigue testing system for magnetic shaft linear motors disclosed in this invention is as follows: The housing of the magnetic shaft linear motor 103 is fixed to the top of the magnetic shaft linear motor mounting base 102. Then, the magnetic shaft linear motor 103 is powered on, and the actuator of the magnetic shaft linear motor 103 will continuously extend and retract. When the actuator of the magnetic shaft linear motor 103 moves upward, it will push the counterweight 105 on the load mounting platform 104 to move upward (by changing the weight of the counterweight 105, the load size of the magnetic shaft linear motor 103 being tested is changed). At the same time, it will also overcome the elastic force of the two load adjustment springs 110. At this time, fatigue testing of the magnetic shaft linear motor 103 can be performed. The distance change between the load mounting platform 104 and the adjustment platform 108 is monitored in real time by the second sliding resistance distance measuring rod 107, that is, whether the displacement of the actuator of the magnetic shaft linear motor 103 meets the standard. By controlling the support cylinder 114, the telescopic rod of the support cylinder 114 drives the support base 113 to move. The support base 113 drives the adjustment platform 108 to move through the support spring 112. The adjustment platform 108 then drives the magnetic shaft linear motor mounting base 102 and the magnetic shaft linear motor 103 to move synchronously. At the same time, the limiting sleeve 111 also moves. However, the limiting sleeve 111 and the nut sliding block 122 will slide relative to each other, so the nut sliding block 122 will not move. That is to say, the position of the nut sliding block 122 on the adaptive load adjustment sliding rod 109 remains unchanged. Therefore, the bottom position of the load adjustment tension spring 110 will remain unchanged. This is equivalent to controlling the support cylinder 114, which also controls the height position of the magnetic shaft linear motor 103 housing, used to adjust the distance between the load mounting platform 104 and the adjustment platform 108, facilitating the installation of the magnetic shaft linear motor 103.

[0023] If the test load of the magnetic shaft linear motor 103 is changed, the counterweight 105 can be replaced. Alternatively, during the test, the load can be adjusted by controlling the auxiliary adjusting motor 120 and the main adjusting motor 119. Therefore, the load can be changed in real time according to the fatigue test of the magnetic shaft linear motor 103 to adapt to the load simulation at different stages of the actual operation of the magnetic shaft linear motor 103. Specifically, the auxiliary adjusting motor 120 and / or the main adjusting motor 119 are controlled. It should be noted that both the output shafts of the auxiliary adjusting motor 120 and the main adjusting motor 119 are equipped with a one-way transmission mechanism (worm gear mechanism). That is, a worm gear mechanism is set between the output shaft of the main adjusting motor 119 and the transmission path of the central gear 129 to prevent reverse power transmission. A worm gear mechanism is also set between the output shaft of the auxiliary adjusting motor 120 and the transmission path of the outer gear ring 127 to prevent reverse power transmission. For example, when the auxiliary regulating motor 120 is started, its output shaft drives the outer gear ring 127 to rotate via the transmission belt 126. The outer gear ring 127 drives the planetary gear 128 to revolve around the central gear 129. Since the output shaft of the main regulating motor 119 is rotating at this time, the central gear 129 is in a fixed state. Therefore, the planetary gear 128 drives the planetary drive disk 125 to rotate, which in turn drives the drive gear disk 124 to rotate. The drive gear disk 124 drives the two driven gears 123 to rotate, which in turn drives the two adaptive load adjusting sliding rods 109 to rotate. The rotation of the two adaptive load adjusting sliding rods 109 causes them to rotate relative to the nut sliding block 122. Since the nut sliding block 122 is restricted by the limiting sleeve 111 and cannot rotate, it will displace along the axial direction of the adaptive load adjusting sliding rod 109. The load mounting platform 104 is moved by the load adjustment spring 110, which adjusts the distance between the load mounting platform 104 and the adjustment platform 108. For example, when the nut sliding block 122 is at the lowest point of the adaptive load adjustment sliding rod 109, the load mounting platform 104 is also at its lowest position. At this time, the same displacement of the magnetic shaft linear motor 103 requires overcoming a greater force of the load adjustment spring 110 because it needs to drive a greater deformation of the load adjustment spring 110 (with the upward movement as the load direction). Conversely, when the nut sliding block 122 is at the top of the thread of the adaptive load adjustment sliding rod 109, the distance between the load mounting platform 104 and the adjustment platform 108 is the largest. At this time, the force of the load adjustment spring 110 that the magnetic shaft linear motor 103 needs to overcome to move to the same position is the smallest (this is an extreme position and is not used).Similarly, when the main regulating motor 119 is controlled to stop, the auxiliary regulating motor 120 stops rotating, and the outer gear ring 127 also cannot rotate. At this time, the output shaft of the main regulating motor 119 drives the central gear 129 to rotate, the central gear 129 drives the planetary gear 128 to revolve, the planetary gear 128 drives the planetary drive disk 125 to rotate, the planetary drive disk 125 drives the active gear disk 124 to rotate, and the active gear disk 124 drives the adaptive load adjustment sliding rod 109 to rotate through the driven gear 123. Therefore, when either the main regulating motor 119 or the auxiliary regulating motor 120 fails, the entire system can still operate normally and adjust the load tested by the magnetic shaft linear motor 103 in real time.

Claims

1. An adaptive fatigue testing system suitable for a magnetic axial linear motor, characterized by: The bottom plate seat (115) is fixedly installed with two parallel main guide rods (101) arranged at opposite corners of the bottom plate seat (115); the focus position on the bottom plate seat (115) is also rotatably installed with two self-adaptive load adjusting sliding rods (109) arranged in parallel with the main guide rods (101), the bottom ends of the two self-adaptive load adjusting sliding rods (109) penetrate to the lower side of the bottom plate seat (115), and the two self-adaptive load adjusting sliding rods (109) are driven to rotate by a control part; A supporting electric cylinder (114) is fixedly installed at the center position of the upper surface of the bottom plate seat (115), the telescopic rod end of the supporting electric cylinder (114) is fixedly installed with a supporting seat (113), the supporting seat (113) is slidingly installed on all the main guide rods (101) and self-adaptive load adjusting sliding rods (109), and a parallel adjusting table (108) is further arranged above the supporting seat (113), the adjusting table (108) is slidingly installed on all the main guide rods (101) and self-adaptive load adjusting sliding rods (109); a parallel load mounting table (104) is arranged above the adjusting table (108), and the load mounting table (104) is slidingly installed on all the main guide rods (101) and self-adaptive load adjusting sliding rods (109).

2. The adaptive fatigue testing system for a magnetic bearing linear motor of claim 1, wherein: The load mounting table (104) is fixedly installed with a counterweight (105) in a detachable manner; the upper surface of the adjusting table (108) is fixedly installed with a magnetic shaft linear motor fixing seat (102) at the middle part, the magnetic shaft linear motor fixing seat (102) is fixedly installed with a magnetic shaft linear motor (103), the top end of the actuator rod of the magnetic shaft linear motor (103) is fixedly connected with the lower surface center position of the load mounting table (104) in a detachable manner, and the bottom end of the actuator rod of the magnetic shaft linear motor (103) is slidingly inserted into the magnetic shaft linear motor fixing seat (102).

3. An adaptive fatigue testing system for a magnetic bearing linear motor as claimed in claim 2, wherein: Four supporting springs (112) are arranged between the opposite surfaces of the supporting seat (113) and the adjusting table (108), the four supporting springs (112) are respectively arranged around all the main guide rods (101) and self-adaptive load adjusting sliding rods (109), and the two ends of the supporting spring (112) are fixedly connected with the adjusting table (108) and the supporting seat (113) respectively.

4. The adaptive fatigue testing system for a magnetic bearing linear motor of claim 3, wherein: The outer side of each adaptive load adjusting sliding rod (109) is sleeved with a limiting sleeve (111), and the two limiting sleeves (111) are fixedly installed on the adjusting table (108); the inner side of the limiting sleeve (111) is provided with a limiting sleeve spline groove (121), and the limiting sleeve spline groove (121) is slidably installed with a nut sliding block (122) sleeved on the adaptive load adjusting sliding rod (109) in the form of spline, and the middle part of the adaptive load adjusting sliding rod (109) is provided with threads capable of being threadedly driven with the nut sliding block (122); the adaptive load adjusting sliding rod (109) is further sleeved with a load adjusting tension spring (110), and the two ends of the load adjusting tension spring (110) are fixedly connected with the load mounting table (104) and the nut sliding block (122) respectively.

5. An adaptive fatigue testing system for a magnetic axial linear motor according to claim 4, characterized in that: The control part comprises a base shell (118) for fixing the bottom plate seat (115), and two intermediate transverse plates (116) and a bottom transverse plate (117) are fixedly installed on the inner wall of the base shell (118) and arranged in parallel with the bottom plate seat (115), wherein the intermediate transverse plate (116) is arranged between the bottom plate seat (115) and the bottom transverse plate (117).

6. An adaptive fatigue testing system for a magnetic axial linear motor according to claim 5, characterized in that: Each adaptive load adjusting sliding rod (109) is fixedly installed with a driven gear (123) at one end below the bottom plate seat (115), and the two driven gears (123) are meshingly driven through a driving gear disc (124) rotatably installed on the lower surface of the bottom plate seat (115), wherein the driving gear disc (124) is coaxially fixedly installed with a planetary driving disc (125), the center position of the lower surface of the planetary driving disc (125) is rotatably provided with a central gear (129), and the outer side of the central gear (129) is coaxially provided with an outer side tooth ring (127), and the outer side tooth ring (127) and the central gear (129) are meshingly driven through three planetary gears (128), and the three planetary gears (128) are rotatably installed on the planetary driving disc (125).

7. An adaptive fatigue testing system for a magnetic axial linear motor according to claim 6, characterized in that: The planetary driving disc (125) is rotatably installed on the intermediate transverse plate (116), and the outer side tooth ring (127) is rotatably installed between the intermediate transverse plate (116) and the bottom transverse plate (117).

8. An adaptive fatigue testing system for a magnetic axial linear motor according to claim 7, characterized in that: The lower surface of the bottom transverse plate (117) is fixedly installed with a main adjusting motor (119) and an auxiliary adjusting motor (120), wherein the output shaft of the auxiliary adjusting motor (120) is drivingly connected with the outer side tooth ring (127) through a transmission belt (126), and the output shaft of the main adjusting motor (119) is fixedly connected with the central gear (129).

9. An adaptive fatigue testing system for a magnetic axial linear motor according to claim 8, characterized in that: A first sliding resistance distance measuring rod (106) is arranged between the supporting seat (113) and the adjusting table (108), and a second sliding resistance distance measuring rod (107) is arranged between the adjusting table (108) and the load mounting table (104), the first sliding resistance distance measuring rod (106) is used for detecting the distance between the adjusting table (108) and the supporting seat (113), and the second sliding resistance distance measuring rod (107) is used for detecting the distance between the adjusting table (108) and the load mounting table (104).

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