An electric push rod load life test device

Abstract

The utility model discloses a kind of electric push rod load life testing devices, comprising: rack;Fixed seat is located in the lower part of the rack, for fixing the electric push rod to be measured;At least two horizontal parallel arrangements of sliding load, sequentially arranged in the vertical direction above the electric push rod to be measured;The lowermost sliding load is connected with the output end of the electric push rod to be measured;Guiding mechanism, vertically arranged on the rack, for guiding the sliding load along vertical direction sliding;Barrier, located on the rack or guiding mechanism, for abutting below each layer of sliding load to maintain the spacing between layers;Wherein, the electric push rod to be measured pushes the lowermost sliding load to move up and sequentially triggers the sliding load linkage of adjacent upper layer, forms load stepwise increasing.The utility model has the advantages that: the stepwise increasing of load is realized, the dynamic scene of load layer-by-layer superposition in actual working condition can be simulated, and test result is closer to real application.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical equipment testing technology, specifically to an electric push rod load life testing device. Background Technology

[0002] In the field of electric linear actuator testing, the flexibility and efficiency of load simulation are key technical requirements. Chinese Patent Publication No. CN218865497U discloses a technical solution entitled "An Electric Linear Actuator Testing Device with Arbitrarily Changeable Load," which achieves load adjustment through a combination structure of pulleys, connecting ropes, and stacked load blocks. Specifically, the device includes a frame, an electric linear actuator, pulleys, a load assembly (composed of a coupling, pins, and multiple load blocks), and connecting ropes. The number of loads is selected by inserting pins into load blocks at different positions. While this solution solves some of the problems associated with the complexity of traditional counterweight adjustments, it still has the following limitations:

[0003] Load adjustment relies on manual operation: it requires manually inserting or removing pins to change the number of load blocks, and each adjustment requires interrupting the test process, which is inefficient and introduces the risk of human error. This is especially true for multi-level test scenarios with frequent load switching, where the operation becomes significantly more cumbersome.

[0004] Structural complexity and maintenance costs: The stacking of load components requires the use of couplings, pins, and through holes. The first through holes of multiple load blocks need to be precisely aligned to form a through second hole, demanding high machining and assembly precision. Over long-term use, the pins and through holes are prone to wear, leading to loose connections between load blocks and affecting testing accuracy and safety. Furthermore, the redundant structure of connecting ropes, pulleys, and guides further increases the complexity of the device and the difficulty of maintenance.

[0005] Insufficient dynamic load simulation capability: This device can only achieve step-by-step adjustment of static load by increasing or decreasing the number of load blocks, and cannot simulate the alternating load scenario caused by the gradual accumulation or sudden change of load in actual working conditions. For example, it cannot realize automatic switching or dynamic accumulation of load during the movement of the push rod, resulting in deviations between test results and actual applications.

[0006] Transmission reliability issues: Relying on connecting ropes and pulleys for transmission, long-term testing is prone to reduced transmission efficiency due to rope stretching, pulley wear, or load block swaying, and may even lead to rope breakage, affecting the service life and stability of the testing device. Utility Model Content

[0007] The purpose of this invention is to provide an electric actuator load life testing device that abandons the traditional cable drive and manual pin adjustment methods. Through a vertical frame, multi-layered sliding load components, and a linkage design with blocking components, it achieves automated triggering of dynamic alternating loads. In this device, the sliding load components are arranged in layers along the vertical direction via a guide mechanism. The actuator under test pushes the load components upwards layer by layer. The load layers and spacing can be flexibly adjusted by the blocking components. This not only avoids manual intervention but also accurately simulates the real working conditions of the actuator under alternating loads, significantly improving testing efficiency and reliability.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] An electric linear actuator load life testing device includes:

[0010] frame;

[0011] A mounting base located at the lower part of the frame is used to fix the electric push rod to be tested;

[0012] At least two horizontally parallel sliding load members are arranged vertically above the electric push rod under test; the lowest sliding load member is connected to the output end of the electric push rod under test.

[0013] A guiding mechanism, vertically mounted on the frame, is used to guide the sliding load component to slide in the vertical direction;

[0014] A blocking element, provided on the frame or guide mechanism, is used to abut against the underside of each sliding load element to maintain the spacing between layers;

[0015] The electric push rod under test pushes the lowest sliding load component to move upward and sequentially triggers the linkage of the adjacent upper sliding load components, forming a step-like increase in load.

[0016] In the aforementioned electric push rod load life testing device, the sliding load component is provided with an adjustable top rod, which is used to adjust the linkage distance between the lower sliding load component and the upper sliding load component.

[0017] In the aforementioned electric push rod load life testing device, the sliding load component includes a sliding plate and a replaceable load block disposed thereon.

[0018] In the above-mentioned electric push rod load life testing device, the guide mechanism includes at least two vertically spaced slide rods, and the sliding load member is slidably sleeved on the slide rods.

[0019] In the above-mentioned electric push rod load life testing device, the blocking member is an adjustable clamp provided on the slide rod, and the distance between adjacent sliding load members can be changed by adjusting its position on the slide rod.

[0020] In the aforementioned electric linear actuator load life testing device, the electric linear actuator load life testing device further includes:

[0021] The controller is used to control the execution of the test process;

[0022] A quick-connection clamp, located on the frame, is used to establish a detachable electrical connection with the motor wires of the electric actuator under test;

[0023] The test switch is communicatively connected to the controller;

[0024] The test switch is configured to: trigger the controller to start a stepped incremental load test process upon first operation; and trigger the controller to immediately stop the test process upon subsequent operation during the test.

[0025] In the above-mentioned electric linear actuator load life testing device, a proximity sensor is provided on the top of the frame, which is used to control the electric linear actuator under test to stop pushing upward when the uppermost sliding load component is detected to be approaching.

[0026] In the above-mentioned electric linear actuator load life testing device, the bottom of the lowest sliding load component is provided with a connector with a U-shaped connecting groove. The output end of the electric linear actuator to be tested is inserted into the connecting groove and fixed by a pin that penetrates the side wall of the connector and the output end.

[0027] In the aforementioned electric push rod load life testing device, a counter is provided on the frame next to the bottom sliding load component to record the number of times the bottom sliding load component moves.

[0028] In the above-mentioned electric linear actuator load life testing device, the top of the fixed base is provided with a fixed groove with a concave cross-section, the bottom of the electric linear actuator to be tested is inserted into the fixed groove, and fixed by bolts that penetrate the side wall of the fixed groove and the electric linear actuator.

[0029] Compared with the prior art, the advantages of this utility model are:

[0030] Abandoning the traditional method of manually adjusting the load using pins, this system uses an electric push rod to move the lowest sliding load component upwards, automatically triggering the linkage of adjacent upper-level sliding load components. This achieves a stepped increase in load, simulating the dynamic scenario of loads stacking layer by layer in actual working conditions, resulting in test results that more closely resemble real-world applications. The design employs a combination of multi-layer sliding load components and blocking components, eliminating the need for complex rope, pulley, and pin structures. Adjusting the spacing between layers via the blocking components changes the load triggering sequence, reducing wear on mechanical transmission components and lowering maintenance costs. It also supports flexible adjustment of load levels and triggering logic. The load increase process does not interrupt the test flow, allowing for continuous operation and automatic switching between multiple load layers. This avoids the tedious manual pin insertion and removal operations of traditional solutions, making it suitable for high-frequency, multi-level load testing scenarios and significantly shortening the test cycle. A guide mechanism guides the sliding load components vertically, ensuring precise movement trajectories, reducing swaying and offset, and improving the stability and data reliability of the test process. This is particularly suitable for life testing where high load accuracy is required. It supports multi-level settings with at least two sliding load components, and the number of load layers can be flexibly increased according to test requirements. It can adapt to the load test requirements of electric actuators of different specifications, and the modular design facilitates future upgrades and functional expansion.

[0031] Furthermore, the sliding load component is equipped with an adjustable push rod, which is used to adjust the linkage distance between the lower sliding load component and the upper sliding load component. The adjustable push rod can precisely control the linkage timing between the upper and lower sliding load components, and by adjusting the length of the push rod, the contact buffer during the linkage of the load components can be optimized, avoiding mechanical impact caused by rigid collisions, reducing wear of the load components and vibration of the testing device, thereby improving the stability of test data and the service life of the equipment.

[0032] Furthermore, the sliding load component includes a sliding plate and replaceable load blocks disposed thereon. The load blocks on each sliding load component can be independently disassembled or replaced, and by combining and stacking load blocks of different weights, the precise load value required for testing can be quickly matched.

[0033] Furthermore, the guiding mechanism includes at least two vertically spaced slide rods, and the sliding load member is slidably sleeved on the slide rods. The spaced slide rods form a parallel guiding structure. The sliding load member engages with the slide rods through a sliding sleeve (or through a hole) fitted onto the slide rod, effectively limiting the horizontal swaying or forward / backward shift of the load member, ensuring that it moves only along the vertical direction of the slide rod. Multiple layers of sliding load members are sleeved on the same set of slide rods, sharing a guiding reference, which avoids the problem of asynchronous movement of load members in different layers due to inconsistencies in the guiding mechanism.

[0034] Furthermore, the blocking component is an adjustable clamp mounted on the slide rod. By adjusting its position on the slide rod, the spacing between adjacent sliding load components can be changed. The position of the adjustable clamp directly determines the initial spacing between adjacent sliding load components. By moving the clamp's installation position on the slide rod up and down, the distance at which the lower load component moves upward to trigger the upper load component's linkage can be precisely set.

[0035] Furthermore, the electric linear actuator load life testing device also includes: a controller for controlling the execution of the test process; quick-connect clamps, mounted on the frame, for establishing a detachable electrical connection with the motor wires of the electric linear actuator under test; and a test switch, communicatively connected to the controller. The test switch is configured to: trigger the controller to start a stepped increasing load test process upon initial operation; and trigger the controller to immediately stop the test process upon subsequent operation during the test. The controller can preset the test parameters for the stepped increasing load (such as the trigger conditions for each load level, the operating cycle, and the load holding time), automatically executing the test process according to the program to avoid process deviations caused by manual operation. The quick-connect clamps adopt a spring clamp or plug-in design, directly clamping the motor wires of the electric linear actuator under test, completing the electrical connection without the need for tools such as screwdrivers, significantly shortening the wiring time before testing.

[0036] Furthermore, a proximity sensor is installed on the top of the frame to control the electric push rod under test to stop pushing upward when the uppermost sliding load component is detected approaching. This function can prevent the load component from hitting the top of the frame due to uncontrolled stroke of the push rod, and prevent mechanical failures such as load block falling off and push rod output end deformation, significantly reducing the risk of damage to the testing device.

[0037] Furthermore, the bottom of the lowest sliding load component is provided with a connector with a U-shaped connecting groove. The output end of the electric push rod under test is inserted into the connecting groove and fixed by a pin that penetrates the side wall of the connector and the output end. The U-shaped structure of the connecting groove can evenly distribute the tensile or thrust force on the output end, avoiding local stress concentration caused by single-point fixing. The U-shaped connecting groove and the output end of the electric push rod form a rigid surface contact connection. The pin penetrating the side wall of the connector and the output end can effectively prevent the connection from loosening or falling off due to thrust fluctuations during the test.

[0038] Furthermore, a counter is installed on the frame next to the bottom sliding load component to record the number of times the bottom sliding load component moves. The counter can record the number of movements in real time without manual operation, which is especially suitable for long-term continuous testing scenarios, avoiding fatigue and errors caused by manual counting. By recording the number of movements of the sliding load component (i.e., the number of reciprocating cycles of the electric actuator), the counter can directly reflect the working life of the actuator under specific load conditions.

[0039] Furthermore, the top of the mounting base is provided with a U-shaped mounting groove. The bottom of the electric push rod to be tested is inserted into the mounting groove and fixed by bolts that penetrate the side wall of the mounting groove and the electric push rod. The bolt fixing points are located on both sides of the mounting groove, and the symmetrical force design avoids local stress concentration caused by single-point fixing. Attached Figure Description

[0040] Figure 1 This is a top-view perspective view of the electric linear actuator load life testing device of this utility model during testing.

[0041] Figure 2 This is a perspective view taken from below during testing of an electric linear actuator load life testing device according to this utility model.

[0042] Figure 3 This is a perspective view of an electric push rod load life testing device according to the present invention.

[0043] The attached figures are labeled as follows:

[0044] Frame 100, proximity sensor 110, counter 120, mounting base 200, mounting groove 210, bolt 220, sliding load component 300, sliding plate 310, load block 320, connector 330, connecting groove 331, pin 332, guide mechanism 400, slide bar 410, blocking component 500, adjustable top rod 600, controller 700, quick-connect clamp 800, electric push rod under test 900. Detailed Implementation

[0045] An electric linear actuator load life testing device includes:

[0046] 100 racks;

[0047] A mounting base 200 located at the lower part of the frame 100 is used to fix the electric push rod 900 to be tested.

[0048] At least two horizontally parallel sliding load members 300 are arranged vertically above the electric push rod 900 to be tested; the lowest sliding load member 300 is connected to the output end of the electric push rod 900 to be tested.

[0049] The guide mechanism 400 is vertically mounted on the frame 100 and is used to guide the sliding load member 300 to slide in the vertical direction;

[0050] A blocking member 500 is provided on the frame 100 or the guide mechanism 400 and is used to abut against the underside of each layer of sliding load member 300 to maintain the spacing between layers.

[0051] The electric push rod 900 under test pushes the lowest sliding load component 300 upward and sequentially triggers the adjacent upper sliding load components 300 to move together, forming a step-by-step increase in load.

[0052] Abandoning the traditional method of manually adjusting the load using pins 332, this system uses an electric push rod to move the lowest sliding load component 300 upwards, automatically triggering the adjacent upper sliding load components 300 to achieve a stepped increase in load. This simulates the dynamic scenario of loads stacking layer by layer in actual working conditions, resulting in test results that are closer to real-world applications. The design employs multiple sliding load components 300 in conjunction with blocking components 500, eliminating the need for complex rope, pulley, and pin 332 structures. Adjusting the spacing between layers using the blocking components 500 changes the load triggering sequence, reducing wear on mechanical transmission components and lowering maintenance costs. It also supports flexible adjustment of load levels and triggering logic. The load increase process does not interrupt the test flow, allowing for continuous operation and automatic switching between multiple loads. This avoids the tedious manual insertion and removal of pins 332 in traditional solutions, making it suitable for high-frequency, multi-level load testing scenarios and significantly shortening the test cycle. The guide mechanism 400 guides the sliding load component 300 to slide vertically, ensuring accurate movement of the load component, reducing swaying and offset, and improving the stability and data reliability of the testing process. It is especially suitable for life testing with high load accuracy requirements. It supports multi-level settings of at least two sliding load components 300, and the number of load layers can be flexibly increased according to testing needs. It can adapt to the load testing requirements of different specifications of electric actuators, and the modular design facilitates future upgrades and functional expansion.

[0053] The embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0054] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] See Figure 1 , Figure 2 , Figure 3 This invention relates to an embodiment of an electric linear actuator load life testing device. The device includes a frame 100, which provides support for the entire testing device. A fixing seat 200 is provided at the lower part of the frame 100 to fix the electric linear actuator 900 under test, ensuring its stability during testing. A guide mechanism 400 and a sliding load member 300 are provided on the frame 100. The guide mechanism 400 is vertically mounted on the frame 100 and guides the sliding load member 300 to slide vertically. There are at least two sliding load members 300, arranged horizontally and parallel to each other. All sliding load members 300 are sequentially positioned above the electric linear actuator 900 under test. The lowest sliding load member 300 is connected to the output end of the electric linear actuator 900 under test, which is its piston.

[0058] Each sliding load member 300 is equipped with a blocking member 500 below it. The blocking member 500 can be fixed to the frame 100 or the guide mechanism 400, maintaining the spacing between the sliding load members 300. During testing, the electric actuator 900 under test pushes the lowest sliding load member 300 upwards, sequentially triggering the adjacent upper sliding load members 300, creating a stepped increase in load. This stepped increase in load means that when the electric actuator 900 under test travels upwards for the first segment, it only pushes the load of one layer of sliding load members 300. In the second segment, the load increases directly from one layer to two layers of sliding load members 300. If there are multiple strokes, the load will increase in a stepped manner.

[0059] Furthermore, to facilitate adjustment of the distance of each stroke, an adjustable top rod 600 is provided on the sliding load member 300. The adjustable top rod 600 can extend upwards uniformly or downwards. The adjustable top rod 600 and the sliding load member 300 can be threaded together to adjust the distance between the top of the adjustable top rod 600 and the adjacent sliding load member 300, thereby achieving stroke adjustment. In this embodiment, each layer of sliding load member 300 is provided with an upwardly extending adjustable top rod 600. The distance between the top surface of the adjustable top rod 600 and the bottom of the upper layer of sliding load member 300 is the upward stroke distance of that layer of sliding load member 300. Of course, in order to smoothly push the upper layer of sliding load member 300 to move, more than one adjustable top rod 600 can be provided on the lower layer of sliding load member 300. In addition, to reduce impact, a cushioning rubber or similar material can be provided on the top of the adjustable top rod 600.

[0060] The structure of each sliding load component 300 includes a sliding plate 310 and a replaceable load block 320 mounted thereon. The sliding plate 310 is generally a flat plate. The sliding plate 310 has sliding components that match the guide mechanism 400. For example, if the guide mechanism 400 is a sliding rod 410, a sliding hole is opened in the sliding plate 310, and a sliding sleeve matching the sliding rod 410 can be installed in the sliding hole. If the guide mechanism 400 is a slide rail, a slider matching the slide rail is provided on the sliding plate 310. Generally, the sliding plate 310 moves up and down in the vertical direction. Therefore, the load block 320 can be directly placed on the sliding plate 310. Of course, the load block 320 can also be fixed to the sliding plate 310 by detachable methods such as snap-fit ​​or threaded connection.

[0061] In this embodiment, the guide mechanism 400 adopts slide rods 410. At least two slide rods 410 are provided on the frame 100, located on both sides of the length direction of the sliding load member 300. The two or more slide rods 410 are spaced apart to form a parallel guide structure. The sliding load member 300 cooperates with the slide rod 410 through a sliding sleeve fitted on the slide rod 410, which can effectively limit the horizontal swaying or forward and backward displacement of the load member, ensuring that it only moves along the vertical direction of the slide rod 410. In addition, the length of the slide rod 410 can be determined according to the test requirements, thereby accommodating more layers of sliding load members 300. When it is necessary to test higher levels of load increments, only new sliding load members 300 need to be added to the slide rod 410, without modifying the basic structure of the frame 100 or the guide mechanism 400, so that the device can adapt to the load test requirements of electric push rods of different specifications. Multiple layers of sliding load members 300 are fitted on the same set of slide rods 410 and share the guide reference, which can avoid the problem of asynchronous movement of load members of different layers due to inconsistencies in the guide mechanism 400. In addition to using a slide rod 410, the guide mechanism 400 can also use a slide rail structure. A slider that cooperates with the slide rail is fixed on the guide mechanism 400, which can also play the role of guiding the movement of the sliding load component 300.

[0062] Furthermore, when the guide mechanism 400 uses a slide rod 410, the blocking component 500 uses an adjustable clamp. By adjusting the position of the adjustable clamp on the slide rod 410, the vertical distance between adjacent sliding load components 300 is changed, and the adjustable clamp can also support the sliding load component 300 above it. The adjustable clamp is usually fastened with a bolt 220 (such as an open ring clamp). During adjustment, simply loosen the bolt 220, move the clamp to the target position, and then tighten it again, without the need for additional tools or disassembly of other parts. The clamp and slide rod 410 are fixed by surface friction, without a complex mechanical linkage structure, and are less prone to component failure due to frequent adjustments during long-term use. In addition, the clamp itself is a standardized part, which can be quickly replaced after damage, and the maintenance cost is significantly lower than that of the traditional pin 332 type load adjustment mechanism. If the guide mechanism 400 uses a slide rail, a limiting block can be inserted into the slide rail to restrict the sliding position of the slider, thereby determining the starting position of each layer of sliding load component 300.

[0063] Based on the above embodiment, a proximity sensor 110 is provided on the top of the frame 100 to control the electric push rod 900 under test to stop pushing upwards when the uppermost sliding load component 300 is detected approaching. The proximity sensor 110 monitors the position of the uppermost sliding load component 300 in real time. When the load component approaches a preset position on the top of the frame 100 (e.g., 5cm from the top), the sensor immediately sends a signal to the controller 700, triggering the electric push rod to stop. This function can prevent the load component from hitting the top of the frame 100 due to uncontrolled stroke of the push rod, prevent mechanical failures such as the load block 320 falling off and the push rod output end rod deforming, and significantly reduce the risk of damage to the testing device. Traditional testing devices require manual observation of the load component's movement and manual shutdown, which poses a risk of overload due to human negligence. The proximity sensor 110 achieves fully automated limit switching without the need for real-time manual monitoring, making it particularly suitable for long-term continuous testing scenarios, improving operational safety and convenience. In addition, the proximity sensor 110 can accurately set the stop position of the load component (e.g., with an error of ±1mm), ensuring that the maximum stroke of the electric push rod is consistent in each test and avoiding deviations in load test data due to stroke differences. The proximity sensor 110 typically uses electromagnetic induction or photoelectric principles, and can detect position without direct contact with the load component, avoiding the failure problems caused by collision and wear of traditional mechanical limit switches.

[0064] A counter 120 is installed on the frame 100 next to the bottom sliding load component 300. The counter 120 is positioned close to the bottom sliding load component 300. The counter 120 can be designed using a photoelectric sensor (non-contact) or a mechanical contact (contact) and mounted on the frame 100 or the sliding load component 300. For example, the photoelectric counter 120 counts by detecting the number of times the load component blocks light, eliminating the risk of mechanical wear and making it suitable for high-frequency testing; the mechanical counter 120 counts using gear transmission, featuring a simple and durable structure suitable for harsh environments. Both methods ensure the accuracy and reliability of the count. Whether it is a constant test with a single layer of load or a stepped incremental test with multiple layers of load, the counter 120 uses the actual number of movements of the sliding load component 300 as the statistical benchmark, unaffected by changes in load weight.

[0065] Based on the above embodiments, the electric actuator load life testing device further includes a controller 700, a quick-connect clamp 800, and a test switch. The controller 700 controls the execution of the test process, the quick-connect clamp 800 establishes a detachable electrical connection with the motor wires of the electric actuator under test, and the test switch is communicatively connected to the controller 700. Upon the first operation of the test switch, the controller 700 is triggered to start a stepped increasing load test process. During the test, if the test switch is operated again, the controller 700 is triggered to immediately stop the test process. Alternatively, a predetermined number of test cycles can be input to the controller 700 through its interface, allowing the counter 120 to communicate with the controller 700, and the test will automatically stop after the predetermined number of test cycles is reached.

[0066] For the structure of the fixing base 200 for fixing the electric actuator 900 under test, a cavity-shaped fixing base 200 can be adopted. That is, a cavity is opened at the top of the fixing base 200 to fit the bottom of the electric actuator 900 under test. The bottom of the electric actuator 900 under test is inserted into the cavity to complete the fixing of the electric actuator 900 under test. The fixing base 200 can also be as follows: Figure 3 As shown, the fixing base 200 is a fixing groove 210 with a concave cross-section. The bottom of the electric push rod 900 under test is inserted into the fixing groove 210 and fixed by bolts 220 that penetrate the side wall of the fixing groove 210 and the electric push rod 900 under test. The two side walls of the concave fixing groove 210 and the bottom of the electric push rod form a rigid constraint that surrounds it on three sides. After the bolts 220 penetrate the side wall and are fixed to the push rod, the forward and backward, left and right swaying and vertical displacement of the push rod during the test can be effectively restricted. The fixing points of the bolts 220 are located on the two side walls of the fixing groove 210. The symmetrical force design can avoid local stress concentration caused by single-point fixing. For example, if a single-sided bolt 220 is used for fixing, the push rod may be twisted and deformed due to uneven force. However, the concave groove combined with the double-sided bolt 220 fixing can make the bottom of the push rod evenly stressed, reducing the risk of structural damage caused by the fixing method. This is especially suitable for long-term, high-frequency testing scenarios. The dimensions of the U-shaped fixing groove 210 can be standardized according to the bottom specifications of mainstream electric linear actuators (such as width and height to match the flange base of most linear actuators). The linear actuator to be tested only needs to match the bottom shape with the fixing groove 210 to be quickly fixed by bolts 220.

[0067] The output end of the electric actuator 900 under test can be disconnected from the bottom sliding load component 300. The top of the output end can move upwards to lift the sliding load component 300, which then slides down under its own weight. However, if the friction between the sliding load component 300 and the guide mechanism 400 is too high, the sliding load component 300 will descend slowly, affecting testing efficiency. Furthermore, if the load on the electric actuator 900 changes significantly during its descent, it can lead to deviations in the test data. Therefore, a connector 330 is provided at the bottom of the bottom sliding load component 300 to facilitate connection between the output end of the electric actuator 900 under test and the bottom sliding load component 300. Specifically, the connector 330 has a U-shaped connecting groove 331. The bottom of the electric actuator 900 under test is inserted into the fixing groove 210 and fixed by bolts 220 that penetrate the side wall of the fixing groove 210 and the electric actuator. The U-shaped connecting groove 331 and the output end of the electric push rod form a rigid surface contact connection. The pin 332 penetrates the side wall of the connector 330 and the output end, which can effectively prevent the connection from loosening or falling off due to thrust fluctuations during the test.

[0068] During testing, the bottom of the electric actuator 900 under test is first fixedly connected to the fixing slot 210, and the output end of the electric actuator 900 under test is fixedly connected to the connecting slot 331. Then, the motor of the electric actuator 900 under test is connected to the quick-connect clamp 800 through wires. Before testing, the spacing (i.e., the test stroke) of each layer of sliding load members 300 and the weight of the load block 320 on each layer of sliding load members 300 also need to be adjusted. By pressing the test switch, the electric actuator 900 under test is powered on, and the test is started. The output end of the electric actuator 900 under test pushes the bottommost sliding load member 300 upward. After the output end of the electric actuator 900 under test completes the first stroke, the bottommost sliding load member 300 will press against the second-to-last sliding load member 300. As the output end of the electric actuator 900 under test enters the second stroke, it will push the two layers of sliding load members 300 upward. Multiple strokes can be set according to the test needs, and the load increases in a step-like manner as the stroke progresses. After the topmost sliding load component 300 moves upward to its travel distance, it triggers the proximity sensor 110. The controller 700 then sends a signal to control the output end of the electric linear actuator 900 under test to stop moving upward and instead descend. Each sliding load component 300 returns to its original position sequentially. When the output end of the electric linear actuator 900 under test returns to its initial position, it is counted as one complete travel, and the counter 120 records the number of movements. After the set number of travels is completed, the controller 700 will control the electric linear actuator 900 under test to stop operating, or the test can be stopped by a test switch if an abnormality occurs during the test. This technical solution, through the deep integration of "automatic control + modular load + precise mechanical structure," overcomes the bottlenecks of traditional electric linear actuator testing devices, which suffer from "cumbersome manual operation, single load simulation, and complex and easily damaged structure." It significantly improves testing efficiency, data accuracy, equipment reliability, and scenario adaptability, providing an efficient and reliable solution for the industrial-scale batch testing and performance optimization of electric linear actuators.

[0069] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A device for testing the load life of an electric linear actuator, characterized in that, include: frame; A mounting base located at the lower part of the frame is used to fix the electric push rod to be tested; At least two horizontally parallel sliding load members are arranged vertically above the electric push rod under test; the lowest sliding load member is connected to the output end of the electric push rod under test. A guiding mechanism, vertically mounted on the frame, is used to guide the sliding load component to slide in the vertical direction; A blocking element, provided on the frame or guide mechanism, is used to abut against the underside of each sliding load element to maintain the spacing between layers; The electric push rod under test pushes the lowest sliding load component to move upward and sequentially triggers the linkage of the adjacent upper sliding load components, forming a step-like increase in load.

2. The electric linear actuator load life testing device as described in claim 1, characterized in that, The sliding load component is equipped with an adjustable top rod, which is used to adjust the linkage distance between the lower sliding load component and the upper sliding load component.

3. The electric linear actuator load life testing device as described in claim 1, characterized in that, The sliding load component includes a sliding plate and a replaceable load block disposed thereon.

4. The electric linear actuator load life testing device as described in claim 1, characterized in that, The guiding mechanism includes at least two vertically spaced sliding rods, and the sliding load member is slidably sleeved on the sliding rods.

5. The electric linear actuator load life testing device as described in claim 4, characterized in that, The blocking component is an adjustable clamp installed on the slide rod, and its position on the slide rod can be adjusted to change the spacing between adjacent sliding load components.

6. The electric linear actuator load life testing device as described in claim 1, characterized in that, The electric linear actuator load life testing device also includes: The controller is used to control the execution of the test process; A quick-connection clamp, located on the frame, is used to establish a detachable electrical connection with the motor wires of the electric actuator under test; The test switch is communicatively connected to the controller; The test switch is configured to: trigger the controller to start a stepped incremental load test process upon first operation; and trigger the controller to immediately stop the test process upon subsequent operation during the test.

7. The electric linear actuator load life testing device as described in claim 1, characterized in that, The top of the frame is equipped with a proximity sensor, which is used to control the electric push rod under test to stop pushing upward when the uppermost sliding load component is detected to be approaching.

8. The electric linear actuator load life testing device as described in claim 1, characterized in that, The bottom of the lowest sliding load component is provided with a connector with a U-shaped connecting groove. The output end of the electric push rod to be tested is inserted into the connecting groove and fixed by a pin that passes through the side wall of the connector and the output end.

9. The electric linear actuator load life testing device as described in claim 1, characterized in that, A counter is installed on the frame next to the bottom sliding load component to record the number of times the bottom sliding load component moves.

10. The electric linear actuator load life testing device as described in claim 1, characterized in that, The top of the fixed base is provided with a U-shaped fixing groove. The bottom of the electric push rod to be tested is inserted into the fixing groove and fixed by bolts that penetrate the side wall of the fixing groove and the electric push rod.

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