Method for testing durability of hoisting mechanism of outboard motor

Abstract

The invention discloses a durability testing method for a hoisting mechanism of an outboard motor. The durability testing method comprises the following steps: step 1, parameter setting: inputting a rated load, a lifting stroke and environmental parameters corresponding to the model of the outboard motor; step 2, multi-mode testing: mode A: simulating a conventional working condition, and continuously and circularly lifting for 5000 times at 80% of a rated load; mode B: simulating an extreme load, randomly applying 120% rated load impact, and circularly inserting once every 100 times; the mode C is in an environment superposition state, and testing of the mode A, the mode B or the mode A and the mode B is carried out in a salt mist environment and a high-temperature environment; compared with the prior art, multiple modes are adopted for testing, and compared with single load testing, the authenticity of the hoisting mechanism in the testing process is improved, so that the durability testing effect of the hoisting mechanism is improved, and meanwhile durability testing of the hoisting mechanism in different salt mist, temperature and humidity environments is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a durability testing method for an outboard motor hoisting mechanism. Background Art

[0002] An outboard motor is a propulsion device installed outside the stern of a boat to provide power for small boats. An outboard motor mainly includes an engine, a transmission system, a lifting mechanism, a propeller, and a control system. The lifting mechanism of an outboard motor is the core component that controls the tilt angle and lifting of the outboard motor in the water. It is mainly used to adjust the water depth of the propeller, adapt to different water environments, and optimize the performance of the boat during navigation.

[0003] The flexibility of the lifting mechanism's telescopic movement, positioning accuracy, safety of use and service life have always been important indicators for manufacturing qualified lifting mechanisms. In order to ensure the production quality of the lifting mechanism, the lifting mechanism is generally subjected to safety inspections such as inching control test, lifting force test and durability test. These tests are static tests of the lifting mechanism cylinder. For example, the durability test is to test the stability of the lifting mechanism after long-term and multiple extensions and retractions.

[0004] To solve the above problems, Chinese patent application number 202222111476.5 discloses a dynamic testing device for a lifter. The above-mentioned testing device comprises a vertical support member, a lifter, an outboard motor simulation body and a sway simulation mechanism; the top of the vertical support member is hinged to the top of the outboard motor simulation body, a tensile and pressure sensor is installed in the middle of the outboard motor simulation body, a connecting seat is fixed to the sensing surface of the tensile and pressure sensor, and the two ends of the lifter are respectively hinged to the middle of the vertical support member and the connecting seat; the sway simulation mechanism is used to drive the vertical support member to simulate the surging state of the water surface of the boat. Chinese patent application number 202420807763.6 discloses a durability testing device for an outboard motor operating handle. The durability testing device disclosed above includes: a support platform; a handle bracket connected to the support platform, the handle bracket being used to install the test handle and make the grip of the test handle protrude from the handle bracket; a power support frame connected to the support platform; a drive assembly connected to the power support frame, and the drive assembly is detachably connected to the grip of the test handle, the drive assembly is used to drive the grip of the test handle to rotate; a detection component connected to the power support frame and the drive assembly, and used to detect the number of rotations of the test handle.

[0005] In the above - disclosed prior art, the lifting mechanism is fixed by a support member, and the outboard engine simulation body is arranged on the lifting mechanism to simulate the weight of the outboard engine. At the same time, the sway simulation mechanism is used to simulate the water surface surging state of the boat in the actual use environment, so as to realize the test work of the lifting mechanism. However, in the above - mentioned solution, a single load or a fixed number of cycles is adopted, which cannot simulate the complex working conditions of the lifting mechanism during actual operation, and the influence of seawater corrosion and temperature and humidity environment in the real environment on the durability of the lifting mechanism is not considered. Summary of the Invention

[0006] The present invention aims to overcome the above - mentioned defects in the prior art and provides a durability test method for an outboard engine lifting mechanism that can simulate actual working conditions, realize a corrosive environment, and regulate temperature and humidity.

[0007] To achieve the above - mentioned invention purpose, the present invention adopts the following technical solutions: A durability test method for an outboard engine lifting mechanism includes the following steps:

[0008] Step 1: Parameter setting: Input the rated load, lifting stroke, and environmental parameters corresponding to the outboard engine model.

[0009] Step 2: Multi - mode test:

[0010] Mode A: Simulate normal working conditions, continuously lift and lower 5000 times at 80% of the rated load.

[0011] Mode B: Simulate extreme load, randomly apply an impact of 120% of the rated load, and insert it once every 100 cycles.

[0012] Mode C: Environmental superposition state, conduct tests of Mode A, Mode B, or Mode A + B in a salt - fog environment and a high - temperature environment.

[0013] Step 3: Fault checking: Analyze the vibration data through the device to identify characteristic signals such as abnormal structure or hydraulic leakage of the lifting mechanism.

[0014] Step 4: According to the test data, calculate the expected life of the lifting mechanism under 90% load.

[0015] As a preferred solution of the present invention, the parameter input in Step 1 needs to be carried out on a test device, and the test device includes a test mechanism and a control and display system electrically connected to the test mechanism.

[0016] As a preferred solution of the present invention, the test mechanism includes a loading mechanism for testing the lifting mechanism. The loading mechanism includes a lifting part, a loading part, and a pressure sensor. The lifting mechanism operates according to the parameters set in Step 1. After the pressure sensor receives the set value, it automatically adjusts the magnitude of the input current of the loading part.

[0017] As a preferred embodiment of the present invention, the environmental parameters in step one include salt spray concentration and temperature range, both of which are adjusted by a salt spray temperature control box.

[0018] As a preferred embodiment of the present invention, a salt spray injection mechanism, a temperature monitor, and a temperature controller are provided in the salt spray temperature control box, and a testing mechanism is arranged in the salt spray temperature control box.

[0019] As a preferred embodiment of the present invention, in step two, in mode B, the load impact time lasts for 1 second.

[0020] As a preferred embodiment of the present invention, in step three, a vibration sensor is arranged on the hoisting mechanism to detect the vibration data of the hoisting mechanism.

[0021] As a preferred embodiment of the present invention, an upper limit of the vibration frequency is set in step three. When the vibration frequency reaches the set upper limit, it is determined that the hoisting mechanism fails.

[0022] As a preferred embodiment of the present invention, the calculation method in step four is calculated using the linear damage theory, and the linear damage theory formula is:

[0023]

[0024] Where: ni is the actual number of cycles at the i-th stress level; Ni is the number of cycles leading to failure at the i-th stress level; k is the number of different stress levels.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The hoisting mechanism is subjected to cyclic lifting and lowering tests under normal working conditions, and tests of the hoisting mechanism under extreme working conditions are realized under extreme loads. The simulation of the actual seawater corrosion environment and temperature and humidity environment is realized under the environmental superposition state. By using multiple modes for testing, compared with single-load testing, the authenticity of the hoisting mechanism during the testing process is improved, thereby improving the effect of the durability test of the hoisting mechanism. At the same time, the durability test of the hoisting mechanism under different salt spray, temperature, and humidity environments is also realized;

[0027] 2. Further, the expected life of the hoisting mechanism is calculated through test data, thereby realizing the precise control of the durability of the hoisting mechanism, further improving the quality of the hoisting mechanism, ensuring the maintenance of the hoisting mechanism during actual use, and thus increasing the service life of the hoisting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the test mechanism of the present invention;

[0030] Figure 3 It is the front view of the test mechanism of the present invention;

[0031] Figure 4 It is the sectional view of the test mechanism of the present invention

[0032] Reference numerals: test platform 1, installation groove 101, lifting mechanism 2, loading mechanism 3, bracket 301, top plate 3011, support plate 3012, sliding groove 3013, lifting part 302, lifting plate 3021, connecting block 3022, connecting shaft 3023, lifting column 3024, loading part 303, first electromagnet 3031, second electromagnet 3032, pressure sensor 304, base 305, guiding part 3051, guiding hole 3052, hinge seat 306, power supply 4, control and display system 5, vibration sensor 6, salt spray temperature control box 7, salt spray spraying mechanism 701, temperature monitor 702, temperature controller 703. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] As Figures 1-4 shown, a durability test method for an outboard engine lifting mechanism includes the following steps:

[0035] Step 1, parameter setting: input the rated load, lifting stroke and environmental parameters corresponding to the outboard engine model;

[0036] Step 2, multi-mode test:

[0037] Mode A: Simulate the conventional working condition, continuously lift and lower 5000 times at 80% of the rated load;

[0038] Mode B: Simulate the extreme load, randomly apply an impact of 120% of the rated load, and insert it once every 100 cycles;

[0039] Mode C: Environmental superposition state, perform the tests of Mode A, Mode B or Mode A + B in the salt spray environment and high temperature environment;

[0040] Step 3, fault checking: Analyze the vibration data through the device to identify characteristic signals such as abnormal structure or hydraulic leakage of the lifting mechanism 2;

[0041] Step 4, calculate the expected life of the lifting mechanism 2 under 90% load according to the test data.

[0042] The parameter input in Step 1 needs to be carried out on the test device, and the test device includes a test mechanism and a control and display system 5 electrically connected to the test mechanism.

[0043] The test mechanism includes a loading mechanism 3 for testing the hoisting mechanism 2. The loading mechanism 3 includes a lifting part 302, a loading part 303 and a pressure sensor 304. The hoisting mechanism 2 operates according to the parameters set in Step 1. After the pressure sensor 304 receives the set value, it automatically adjusts the magnitude of the input current of the loading part 303.

[0044] Specifically, a pressure sensor 304 is installed on the lifting part 302, a second electromagnet 3032 is installed above the pressure sensor 304, and a first electromagnet 3031 opposite to the second electromagnet 3032 is installed at the top of the stroke range of the hoisting mechanism 2.

[0045] The environmental parameters in Step 1 include the salt mist concentration and the temperature range, both of which are adjusted by the salt mist temperature control box 7.

[0046] Furthermore, the salt mist temperature control box 7 is provided with a salt mist spraying mechanism 701, a temperature monitor 702, and a temperature controller 703. The test mechanism is arranged in the salt mist temperature control box 7. Further, control devices such as a salt mist spraying mechanism 701, a temperature monitor 702, and a temperature controller 703 are installed in the salt mist temperature control box 7. The equipment cables are subjected to airtight treatment. Salt mist is sprayed into the salt mist temperature control box 7 through the salt mist spraying mechanism 701 to simulate the salt mist environment at sea. At the same time, the salt mist sprayed out through the salt mist spraying mechanism 701 can also adjust the humidity in the salt mist temperature control box 7, and the temperature in the salt mist temperature control box 7 is regulated by the temperature controller 703. The temperature monitor 702 is used to monitor the magnitude of the temperature in the salt mist temperature control box 7.

[0047] In Step 2, in Mode B, the load impact time lasts for 1 second. By setting the load impact time, damage to the hoisting mechanism 2 caused by high-intensity loads is avoided, which is not conducive to the test of the true durability of the hoisting mechanism 2.

[0048] In Step 3, a vibration sensor 6 is arranged on the hoisting mechanism 2 for detecting the vibration data of the hoisting mechanism 2. Further, the vibration sensor 6 is arranged on the hoisting mechanism 2 and is electrically connected to the control and display system 5. The vibration data of the hoisting mechanism 2 is detected through the vibration sensor 6, so as to facilitate the detection and judgment of the durability of the hoisting mechanism 2.

[0049] Specifically, in Step 3, the upper limit of the vibration frequency is set. When the vibration frequency reaches the set upper limit, it is determined that the hoisting mechanism 2 fails.

[0050] The calculation method in Step 4 is calculated using the linear damage theory. The linear damage theory formula is:

[0051]

[0052] Where: ni is the actual number of cycles at the i-th stress level; Ni is the number of cycles that cause failure at the i-th stress level; k is the number of different stress levels. Further, by adding the formula of the linear damage theory into the control display system 5, the expected life can be automatically calculated.

[0053] Connect the control lines of equipment such as the hoisting mechanism 2, the temperature monitor 702, the temperature controller 703, the pressure sensor 304, the first electromagnet 3031, the second electromagnet 3032, and the vibration sensor 6 to the control display system 5. There is also a display screen with display and storage functions on the control display system 5.

[0054] Specific method: Turn on the power supply 4 and input the settings of parameters such as the model of the hoisting mechanism 2 to be tested, the load corresponding to the outboard engine, the stroke of the hoisting mechanism 2, the number of cycles, mode selection (selected according to requirements), and the pressure magnitude.

[0055] Next, check the assembly stability of the hoisting mechanism 2 and whether each device is operating normally.

[0056] Next, close the hatch and turn on the start button. According to the parameters set above, the hoisting mechanism 2 operates according to the settings. After the pressure sensor 304 receives the set value, it will automatically adjust the magnitude of the input current of the electromagnet. When the stroke is large, the electromagnet current increases accordingly, and the pressure is stabilized within the set value range. It is also possible to set to increase or decrease the load during the operation of the hoisting mechanism 2 according to requirements, and whether to start environmental tests such as salt spray and high and low temperatures.

[0057] Next, information such as the number of cycles of the hoisting mechanism and the vibration frequency is also recorded on the display screen. Based on this information, the performance of the hoisting mechanism and whether there is a fault can be determined.

[0058] Specifically, the test mechanism includes a test platform 1 and a loading mechanism 3 disposed on the test platform 1 for testing the durability of the hoisting mechanism 2. The loading mechanism 3 includes a bracket 301, a lifting part 302 installed on the bracket 301, and a loading part 303 connected between the lifting part 302 and the bracket 301. The loading part 303 is configured to apply a variable load to the hoisting mechanism 2, and the lifting part 302 is configured to transfer the load to the hoisting mechanism 2; a pressure sensor 304 for feedback the load magnitude is provided on the lifting part 302.

[0059] Furthermore, the test platform 1 is placed horizontally, the hoisting mechanism 2 is placed on the test platform 1, the bracket 301 is fixedly installed on the test platform 1, the lifting part 302 is installed on the bracket 301, and the lifting part 302 can move up and down on the bracket 301. The loading part 303 is located between the bracket 301 and the lifting part 302. A load is applied through the loading part 303, and the load is transmitted to the hoisting mechanism 2 through the lifting part 302, so as to simulate the load borne by the hoisting mechanism 2 in the actual working environment. Through the load provided by the loading part 303, a long-term stable and reliable load is provided for the hoisting mechanism 2, enabling the hoisting mechanism 2 to continuously operate under the rated load. At the same time, the loading part 303 can accurately adjust the load size, thereby changing the load size of the hoisting mechanism 2. Under the action of the pressure sensor 304, the load change is fed back, and then the actual working conditions of the hoisting mechanism 2 of the outboard engine can be simulated, improving the test effect of the hoisting mechanism 2 under long-term or high-frequency rated load and ensuring the accuracy of the test effect.

[0060] Furthermore, as a load providing device, the loading part 303 can use a cylinder, an electric push rod, a hydraulic cylinder, etc. as the load output unit. However, since the load sizes provided by the cylinder, the electric push rod, and the hydraulic cylinder are fixed and the load size cannot be adjusted, preferably, an electromagnet is used as the load output unit, and the load size is adjusted by changing the current size.

[0061] Specifically, the loading part 303 includes a first electromagnet 3031 and a second electromagnet 3032 which are arranged at intervals and have repulsive magnetic poles. The first electromagnet 3031 is arranged at the top of the bracket 301, and the second electromagnet 3032 is arranged on the lifting part 302 and lifts synchronously with the lifting part 302. Further, the current directions of the first electromagnet 3031 and the second electromagnet 3032 are opposite, and the same magnetic poles of the first electromagnet 3031 and the second electromagnet 3032 are placed opposite to each other, that is, N pole to N pole, or S pole to S pole. There is a certain distance between the first electromagnet 3031 and the second electromagnet 3032; the lifting part 302 is slidably connected to the bracket 301, the lifting mechanism 2 is connected to the lifting part 302, and the lifting mechanism 2 is located below the lifting part 302. The lifting part 302 can slide on the bracket 301 along the height direction of the bracket 301; when the first electromagnet 3031 and the second electromagnet 3032 are energized, the two electromagnets repel each other, so that the second electromagnet 3032 and the lifting part 302 descend synchronously, and then the load acts on the lifting mechanism 2; by arranging the first electromagnet and the second electromagnet at intervals and with repulsive magnetic poles, a stable load is provided for the lifting mechanism. At the same time, the second electromagnet is arranged on the lifting part and lifts simultaneously with the lifting part. As the second electromagnet moves, the distance between the first electromagnet and the second electromagnet increases and the repulsive force decreases, so that the load borne by the lifting mechanism decreases, and then the change of the load size of the lifting mechanism is realized, and the size of the changed load is controllable. By increasing or decreasing the current of the first electromagnet and the second electromagnet, the precise control of the load can be realized, ensuring the test effect of the lifting mechanism.

[0062] The lifting part 302 includes a lifting plate 3021 and connecting blocks 3022 arranged at opposite ends of the lifting plate 3021. The connecting blocks 3022 are provided with connecting shafts 3023 which are slidably connected to the bracket 301. Further, the lifting plate 3021 is horizontally arranged, the connecting blocks 3022 are located at opposite ends of the lifting plate 3021, the connecting shafts 3023 are arranged along the length direction of the lifting plate 3021, and the connecting shafts 3023 are slidably connected to the bracket 301. The connection between the lifting plate 3021 and the bracket 301 is realized through the connecting shafts 3023.

[0063] The bracket 301 includes a top plate 3011 and support plates 3012 arranged at both ends of the top plate 3011. The support plates 3012 are arranged on the test platform 1. A chute 3013 is provided on the support plates 3012 along the height direction of the support plates 3012. The connecting shaft 3023 is slidably connected in the chute 3013. Further, the top plate 3011 is horizontally arranged. There are two support plates 3012, and the two support plates 3012 are respectively arranged at opposite ends of the top plate 3011. The support plates 3012 are perpendicularly arranged with respect to the top plate 3011. The two support plates 3012 are fixedly connected to the test platform 1, and the support plates 3012 are perpendicularly connected to the test platform 1. A chute 3013 is provided on the support plates 3012, and the chute 3013 is arranged along the height direction of the support plates 3012. At the same time, the connecting shafts 3023 at both ends of the lifting plate 3021 are slidably connected in the corresponding chutes 3013, thereby realizing the lifting function of the lifting plate 3021.

[0064] The first electromagnet 3031 is arranged on the lower surface of the top plate 3011, and the second electromagnet 3032 is arranged on the lifting plate 3021, and the second electromagnet 3032 is located directly below the first electromagnet 3031. Further, an installation hole is provided in the middle of the top plate 3011. The bolt fixes and installs the first electromagnet 3031 on the top plate 3011 through the installation hole, and the first electromagnet 3031 is installed on the lower surface of the top plate 3011. The second electromagnet 3032 is also installed on the upper surface in the middle of the lifting plate 3021. The first electromagnet 3031 and the second electromagnet 3032 are arranged oppositely, and the first electromagnet 3031 is directly opposite the second electromagnet 3032, so as to ensure that the repulsive force between the two electromagnets is in the maximum state.

[0065] Lifting columns 3024 are provided at the bottom of the lifting plate 3021. The lifting columns 3024 are located at opposite ends of the lifting plate 3021. A base 305 for guiding the lifting of the lifting columns 3024 is provided on the test platform 1. Further, there are two lifting columns 3024, and the two lifting columns 3024 are respectively arranged on the lower surfaces at opposite ends of the lifting plate 3021, and the lifting columns 3024 are perpendicularly arranged on the lifting plate 3021. In addition, the base 305 is fixedly installed on the test platform 1, and the lifting columns 3024 are connected to the base 305, and the lifting of the lifting columns 3024 is guided through the base 305.

[0066] Specifically, guiding parts 3051 are provided on both sides of the base 305. Guiding holes 3052 are provided on the guiding parts 3051 and are arranged along the height direction of the base 305. The lifting columns 3024 are slidably connected in the guiding holes 3052. Further, the guiding parts 3051 are located on both sides of the base 305. Guiding holes 3052 are arranged in the guiding parts 3051. The guiding holes are arranged along the height direction of the guiding parts 3051, and the tops of the guiding holes 3052 are open. The two lifting columns 3024 are slidably arranged in the corresponding guiding holes 3052. The lifting of the lifting columns 3024 is guided by the guiding holes 3052, so as to ensure that the lifting plate 3021 always remains horizontal during the lifting process, avoiding the situation where one end of the lifting plate 3021 is high and the other end is low, so as to ensure that the load applied by the loading part 303 can all act on the lifting mechanism 2, and further ensure the accuracy of the load detection of the lifting mechanism 2.

[0067] An articulated seat 306 for connecting the lifting mechanism 2 is provided at the bottom of the lifting plate 3021. The pressure sensor 304 is arranged between the articulated seat 306 and the lifting plate 3021. Further, the articulated seat 306 is fixed in the middle of the lifting plate 3021. The output shaft of the lifting mechanism 2 is articulated on the articulated seat 306. The pressure sensor 304 is arranged on the lower surface of the lifting plate 3021, that is, the pressure sensor 304 is located between the lifting plate 3021 and the articulated seat 306, so as to ensure the accuracy of the load detection of the lifting mechanism 2 by the pressure sensor 304.

[0068] A plurality of installation grooves 101 are provided on the test platform 1 and are arranged along the length direction of the test platform 1. Both the loading mechanism 3 and the lifting mechanism 2 are connected in the installation grooves 101. A power supply 4 for power supply is also provided on the test platform 1. Further, the support plate 3012 and the base 305 of the loading mechanism 3 are installed in the installation grooves 101 by bolts. At the same time, the lifting mechanism 2 is also fixed in the installation grooves 101, ensuring that both the loading mechanism 3 and the lifting mechanism 2 remain stable during the test, and further ensuring the accuracy of the test results.

[0069] In addition, the power supply 4 is also arranged on the test platform 1. The power supply 4 is electrically connected to the first electromagnet 3031, the second electromagnet 3032, the pressure sensor 304 and the lifting mechanism 4 respectively, and the first electromagnet 3031, the second electromagnet 3032, the pressure sensor 304 and the lifting mechanism 4 are powered by the power supply 4.

[0070] When the power supply 4 is started, the first electromagnet 3031 and the second electromagnet 3032 are energized to provide a stable load for the lifting mechanism 2. The lifting mechanism 2 operates continuously under the rated load. The pressure sensor 304 feeds back the load change, which can simulate the actual working conditions of the outboard engine lifting mechanism, and the performance of the lifting mechanism 2 under long-term or high-frequency use under the rated load can be detected.

[0071] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0072] Although the terms such as test platform 1, installation groove 101, lifting mechanism 2, loading mechanism 3, bracket 301, top plate 3011, support plate 3012, sliding groove 3013, lifting part 302, lifting plate 3021, connecting block 3022, connecting shaft 3023, lifting column 3024, loading part 303, first electromagnet 3031, second electromagnet 3032, pressure sensor 304, base 305, guiding part 3051, guiding hole 3052, hinge seat 306, power supply 4, control and display system 5, vibration sensor 6, salt spray temperature control box 7, salt spray injection mechanism 701, temperature monitor 702, temperature controller 703, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only for more conveniently describing and explaining the essence of the present invention; any interpretation of them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A durability test method for an outboard motor lifting mechanism, characterized in that It includes the following steps: Step 1, parameter setting: Input the rated load, lifting stroke and environmental parameters corresponding to the outboard engine model; Step 2, multi-mode test: Mode A: Simulate the normal working condition and continuously lift and lower 5000 times at 80% of the rated load in cycles; Mode B: Simulate the extreme load, randomly apply an impact of 120% of the rated load, and insert it once every 100 cycles; Mode C: Environmental superposition state, conduct tests of Mode A, Mode B or Mode A + B in the salt spray environment and high temperature environment; Step 3, fault inspection: Analyze the vibration data through the device to identify characteristic signals such as abnormal structure of the lifting mechanism (2) or hydraulic leakage; Step 4, calculate the expected life of the lifting mechanism (2) under 90% load according to the test data.

2. The durability test method for an outboard engine lifting mechanism according to claim 1, wherein The parameter input in Step 1 needs to be carried out on the test device, and the test device includes a test mechanism and a control display system (5) electrically connected to the test mechanism.

3. A durability test method for an outboard motor lifting mechanism according to claim 2, characterized in that, The test mechanism includes a loading mechanism (3) for testing the lifting mechanism (2). The loading mechanism (3) includes a lifting part (302), a loading part (303) and a pressure sensor (304). The lifting mechanism (2) operates according to the parameters set in Step 1. After the pressure sensor (304) receives the set value, it automatically adjusts the magnitude of the input current of the loading part (303).

4. A durability test method for an outboard engine lifting mechanism according to claim 1, characterized in that, The environmental parameters in Step 1 include the salt spray concentration and temperature range, and both the salt spray concentration and temperature range are adjusted by the salt spray temperature control box.

5. The durability test method of an outboard engine lifting mechanism according to claim 4, characterized in that The salt spray temperature control box is provided with a salt spray spraying mechanism, a temperature monitor and a temperature controller, and the test mechanism is arranged in the salt spray temperature control box.

6. The durability test method of an outboard engine lifting mechanism according to claim 1, characterized in that, In Step 2, in Mode B, the load impact time lasts for 1 second.

7. A durability test method for an outboard engine lifting mechanism according to claim 1, characterized in that In Step 3, a vibration sensor (6) is arranged on the lifting mechanism (2) to detect the vibration data of the lifting mechanism (2).

8. A durability test method for an outboard engine lifting mechanism according to claim 1, characterized in that, Set the upper limit of the vibration frequency in Step 3. When the vibration frequency reaches the set upper limit, it is determined that the lifting mechanism (2) fails.

9. A durability test method for an outboard motor lifting mechanism according to claim 1, characterized in that The calculation method in Step 4 is calculated using the linear damage theory, and the linear damage theory formula is: where: n i is the actual number of cycles at the i-th stress level; N i is the number of cycles to failure at the i-th stress level; k is the number of different stress levels.

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