Gear transmission type electric cylinder experimental reliability detection device

Abstract

The application discloses a gear transmission type reliability detection device for electric cylinder experiment, and relates to the technical field of electric cylinder detection.The device comprises a control box, a detection box, a clamping mechanism, a load assembly, an industrial camera, a vibration motor, a high-temperature simulation mechanism and an intelligent temperature controller; the air heating cavity and the air inlet hole are arranged on the push cylinder placement table in the detection box, and all the components work cooperatively; the application has the following advantages: the working condition can be accurately restored, the high-temperature and vibration compound environment can be simulated in the same process, the drawbacks of the traditional step-by-step test can be overcome, the detection data can be in line with the actual situation, the performance can be accurately evaluated, the product design can be optimized, the production efficiency and quality can be improved, the temperature control is accurate and the heat distribution is uniform, the temperature can be accurately controlled according to the preset curve, the exhaust guide box and the strip-shaped exhaust hole design are used to solve the problem of uneven heat distribution, the detection efficiency is greatly improved, the same device and process can complete the detection, the process is simplified, the time is shortened, the research and development is accelerated, the equipment utilization rate is improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of electric cylinder testing technology, and in particular to a reliability testing device for gear-driven electric cylinders. Background Technology

[0002] In the field of testing technology for gear-driven electric cylinders, with the continuous improvement of industrial automation, the requirements for the reliability of electric cylinders are becoming increasingly stringent. In practical applications, electric cylinders are often in complex and variable working environments, especially high-temperature and vibration environments. For example, in some equipment in industries such as metallurgy, chemical industry, and machinery manufacturing, the electric cylinders are subjected to both high temperature and vibration during operation. However, existing testing technologies have obvious limitations. Traditional testing devices can mostly only focus on simulating single factors, or can only perform reliability tests such as load testing, speed testing, accuracy testing, or durability testing.

[0003] Taking the radial load test of the push rod in an electric cylinder as an example, the cylinder body is usually fixed by clamping and the circuit is connected. Then, radial pressure is applied to the end of the push rod for testing. However, this method cannot directly test the gear-driven electric cylinder under the common high temperature or vibration conditions in actual operation. When it is necessary to evaluate the performance of the electric cylinder under the simultaneous presence of high temperature and vibration, the existing method usually involves first conducting a high temperature test on a specialized high temperature testing device, and then transferring the electric cylinder to a vibration testing device for vibration testing. This step-by-step testing method is not only cumbersome and time-consuming, but also makes it difficult to accurately reproduce the combined effect of high temperature and vibration on the electric cylinder under actual operating conditions because the two tests are conducted on different devices and at different times. It cannot comprehensively and realistically reflect the reliability of the electric cylinder under complex actual operating conditions, resulting in deviations between the test results and the actual application. This makes it difficult to accurately evaluate and optimize the performance of the electric cylinder, thus restricting the production efficiency and product quality improvement of related industries. In view of this, this paper proposes a reliability testing device for gear-driven electric cylinders. Summary of the Invention

[0004] The main objective of this invention is to provide a reliability testing device for gear-driven electric cylinders, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A reliability testing device for a gear-driven electric cylinder includes a control box, a testing box, a clamping mechanism for fixing the cylinder body of the gear-driven electric cylinder, a load assembly, an industrial camera for monitoring the testing process, a vibration motor for providing a vibration source, a high-temperature simulation mechanism for simulating a high-temperature environment, and an intelligent temperature controller.

[0007] The detection box is connected to the control box. The inside of the detection box is a cylinder pusher platform for horizontally placing the cylinder body of the gear-driven electric cylinder. The cylinder pusher platform has an air heating chamber, and a number of air inlets are densely arranged on the right side of the air heating chamber.

[0008] The clamping mechanism is installed directly above the cylinder placement platform inside the testing box. The load assembly is vertically suspended on the end of the gear-driven electric cylinder push rod on the right side of the cylinder placement platform in the testing box. It is used to detect the radial force on the end of the push rod in the gear-driven electric cylinder. The industrial camera, vibration motor and intelligent temperature controller are all fixedly connected to the control box, and the lens of the industrial camera faces the push rod in the gear-driven electric cylinder.

[0009] The high-temperature simulation mechanism includes an air filter, a square cylinder, several electric heating wires, and several cooling fans. The outer walls of the two air filters are respectively sealed and fixedly connected to the air heating chambers. The square cylinder is disposed between the two air heating chambers, and the outer wall of the square cylinder is sealed and fixedly connected to the inner wall of the air heating chamber. The left and right openings of the square cylinder are respectively aligned with the two air filters. Several electric heating wires are densely arranged and installed inside the square cylinder. Several cooling fans are disposed on the left side of the two air filters, and the cooling fans are fixedly connected to the cylinder pusher platform.

[0010] Preferably, an exhaust guide box is fixedly connected to the upper left side of the air heating chamber, and the inner cavity opening below the exhaust guide box is connected to the periphery of several cooling fans. Several strip-shaped exhaust holes are provided on the right end face of the exhaust guide box, and the strip-shaped exhaust holes are arranged parallel to each other at equal intervals, with the inner width of the strip-shaped exhaust holes being the same.

[0011] Preferably, the load assembly includes an internally threaded cylinder, two rings, two rectangular frames, and several counterweights. The internally threaded cylinder is threaded onto the screw at the end of the push rod in the gear-driven electric cylinder. The two rings are rotatably mounted on both sides of the internally threaded cylinder, and the two rectangular frames are fixedly mounted on the lower sides of the two rings. The width of the counterweights is the same as the inner width of the rectangular frames, and two symmetrical slots are provided on the lower sides of the counterweights. The lower edges of the two rectangular frames are respectively fitted into the inner cavities of the two slots below the counterweights. Two symmetrical positioning blocks are fixedly connected to the upper sides of the counterweights, and the positions of the two positioning blocks on the counterweights correspond to the positions of the two slots on the counterweights.

[0012] Preferably, the clamping mechanism includes a hydraulic cylinder, two guide cylinders, two guide columns, and a pressure plate. The lower surface of the pressure plate is provided with a rubber pad. The two guide cylinders are respectively arranged parallel to each other on both sides of the hydraulic cylinder. The cylinder body of the hydraulic cylinder and the two guide cylinders are all vertically and fixedly connected to the top surface of the detection box. The upper ends of the two guide columns are vertically and telescopically installed in the two guide cylinders. The lower ends of the two guide columns and the lower end of the piston rod in the hydraulic cylinder are all vertically and fixedly connected to the upper surface of the pressure plate.

[0013] Preferably, a heat insulation cover is fixedly connected to the periphery of the cylinder body in the hydraulic cylinder. The heat insulation cover is provided with heat dissipation holes, which are higher than the top surface of the test box. The heat insulation cover and the test box are fixedly connected.

[0014] Preferably, a door is slidably installed on one side of the testing box, and sliding blocks are fixedly connected to both the upper and lower sides of the door. Sliding grooves are provided on both the upper and lower sides of the front opening of the inner cavity of the testing box. The door is slidably connected to the inner cavity of the two sliding grooves on the testing box through two sliding blocks.

[0015] Preferably, a number of rubber vibration isolators are densely arranged in a matrix between the upper surface of the control box and the lower bottom surface of the detection box, and a control panel is provided on one side of the control box.

[0016] Preferably, a magnetic strip is fixedly connected to the inner end face of the door, and the body of the testing box is made of stainless steel that can attract magnets.

[0017] Preferably, a vacuum glass observation window is fixedly connected to the door of the enclosure.

[0018] Preferably, the upper surface of the push cylinder placement platform is provided with an anti-slip pad.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) Accurately reproduce actual working conditions

[0021] This invention can accurately simulate a combined high-temperature and vibration environment within the same testing process, overcoming the shortcomings of traditional step-by-step testing in reproducing actual working conditions. A single test can simulate the high-temperature and vibration conditions of a gear-driven electric cylinder in a real-world scenario, making the test data more closely resemble actual operating conditions and providing a reliable basis for accurately evaluating the performance of the gear-driven electric cylinder. This allows for a deeper understanding of the working characteristics of the gear-driven electric cylinder under complex conditions, enabling targeted optimization of product design, enhanced product reliability, reduced failure rates, reduced maintenance and downtime, and improved production efficiency and product quality.

[0022] 2) Precise temperature control

[0023] This invention offers high precision in temperature control for high-temperature environments, accurately raising and maintaining the temperature according to a preset temperature curve with minimal temperature error. This ensures stable and accurate temperature conditions for gear-driven electric cylinders during high-temperature testing, avoiding interference from temperature fluctuations with the accuracy of test results. It also makes the testing of material properties, sealing, and transmission efficiency of gear-driven electric cylinders at high temperatures more reliable. Furthermore, it can promptly detect potential problems of gear-driven electric cylinders at high temperatures, such as thermal deformation of components and lubricant failure, providing strong support for optimizing the high-temperature adaptability of products.

[0024] Furthermore, the unique exhaust guide box design of the air heating chamber of the cylinder placement platform plays a crucial role in the testing process. The strip-shaped exhaust holes on its right end face have different internal heights depending on their positions, causing the air in the exhaust guide box to tend to be discharged from the upper exhaust holes. With the attraction of the strip-shaped exhaust holes and the natural upward force of the hot air, the problem of uneven heat distribution caused by the position of the air inlet is effectively solved, allowing the heat in the inner cavity of the testing chamber to be evenly distributed. This not only ensures the stability and consistency of the high-temperature environment simulation and avoids the adverse effects of local overheating or overcooling areas on the accuracy of the test, but also provides a balanced thermal environment for all parts of the gear-driven electric cylinder during high-temperature testing, ensuring the accuracy and reliability of various performance indicators, further improving the overall testing quality and data validity, providing a more accurate basis for the high-temperature adaptability assessment of the gear-driven electric cylinder, and helping to more accurately grasp the characteristics of the product under high-temperature conditions, so as to carry out targeted optimization and improvement.

[0025] 3) Detection efficiency is significantly improved

[0026] Compared to traditional testing techniques that require switching between different high-temperature and vibration testing equipment and repeated installation and debugging of gear-driven electric cylinders, this invention can complete high-temperature and vibration combined-condition testing within the same reliability testing device and process for gear-driven electric cylinders. This greatly simplifies the testing process and significantly shortens the testing time. It enables comprehensive testing of gear-driven electric cylinders in a shorter cycle, accelerating product development and quickly bringing qualified products to market, thus enhancing market competitiveness. At the same time, efficient testing also helps improve the utilization rate of testing equipment, reduce testing costs, and create more substantial economic benefits for enterprises.

[0027] 4) Precise radial force detection: Existing technologies may not be precise enough or lack systematic design for detecting radial force on the end of the push rod of a gear-driven electric cylinder. This invention, through a unique load component design, connects the internal threaded cylinder to the screw at the end of the push rod, and with a rectangular frame that can add or remove counterweights, can precisely adjust and control the radial pressure on the end of the push rod. It can also monitor in real time the various performance indicators of the electric cylinder and the state changes of the push rod under this radial force condition, thus providing a more accurate and systematic detection method for studying the reliability of electric cylinders under radial force conditions.

[0028] 5) Component stability protection: For key components in the reliability testing device for gear-driven electric cylinders, such as hydraulic cylinders, multiple heat insulation and heat dissipation measures are adopted, including heat shields, heat dissipation holes, cooling fans, and heat dissipation fins, to effectively reduce the impact of high-temperature environments and ensure long-term stable operation. At the same time, a matrix arrangement of rubber vibration isolators is used to reduce external vibration interference and the impact of vibration motor operation on other components. Existing technologies may not be comprehensive enough in terms of stability protection for these key components, which may easily lead to component failure due to high temperature or vibration, affecting the accuracy of test results and the continuity of the test process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a partial cross-sectional view of the present invention;

[0031] Figure 3 This is a schematic diagram of the inner structure of the box door in this invention;

[0032] Figure 4 This is the present invention. Figure 2 Enlarged view of the area within the middle circle;

[0033] Figure 5 This is a schematic diagram of the load component in this invention;

[0034] Figure 6 This is a schematic diagram of the high-temperature simulation mechanism in this invention;

[0035] Figure 7 This is a schematic diagram of the exhaust guide box in this invention;

[0036] Figure 8 This is a cross-sectional view of the exhaust guide box in this invention.

[0037] In the diagram: 1. Control box; 101. Control panel; 2. Detection box; 201. Push cylinder placement platform; 202. Box door; 203. Sliding block; 204. Slide groove; 205. Magnetic strip; 206. Vacuum glass observation window; 207. Air heating chamber; 208. Anti-slip pad; 209. Air inlet; 3. Clamping mechanism; 301. Hydraulic cylinder; 302. Guide cylinder; 303. Guide column; 304. Pressure plate; 305. Rubber pad; 306. Heat insulation cover; 3 7. Heat dissipation holes; 4. Load assembly; 401. Internal threaded cylinder; 402. Ring; 403. Rectangular frame; 404. Counterweight; 405. Slot; 406. Positioning block; 5. Industrial camera; 6. Vibration motor; 7. Rubber vibration isolator; 8. High temperature simulation mechanism; 801. Air filter; 802. Square cylinder; 803. Electric heating wire; 804. Cooling fan; 805. Exhaust guide box; 806. Strip exhaust hole; 9. Intelligent temperature controller. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0039] like Figures 1-8 As shown, a reliability testing device for a gear-driven electric cylinder includes a control box 1, a testing box 2, a clamping mechanism 3, a load assembly 4, two industrial cameras 5, a vibration motor 6, several rubber vibration isolators 7, a high-temperature simulation mechanism 8, and an intelligent temperature controller 9.

[0040] refer to Figure 1 and Figure 2 The control box 1 contains a battery and a programmable logic controller (PLC). The battery and PLC are connected sequentially to the industrial camera 5, the vibration motor 6, the electric heating wire 803 in the high-temperature simulation mechanism 8, and the intelligent temperature controller 9 via wires. The battery is connected to an external power source via wires. A control panel 101 is fixedly connected to one outer wall of the control box 1, and a display screen is fixedly connected to the control panel 101 to display the current testing process, key parameters, and fault alarm information in real time. The battery in the control box 1 can not only be charged by connecting to an external power source via wires, but also has the function of providing short-term power to the entire gear-driven electric cylinder experimental reliability testing device in the event of a sudden power outage, ensuring that the testing process will not be interrupted by unexpected power outages or cause equipment damage.

[0041] refer to Figure 1 , Figure 2 and Figure 3A push cylinder placement platform 201 is fixedly installed on the left side of the inner cavity of the detection box 2. The upper surface of the push cylinder placement platform 201 is used to horizontally place the gear-driven electric cylinder to be tested. The end of the push rod in the gear-driven electric cylinder is suspended on the right side of the inner cavity of the detection box 2. A box door 202 is slidably installed in the front opening of the inner cavity of the control box 1. Sliding strips 203 are symmetrically installed on the upper and lower sides of the box door 202. Two sliding grooves 204 are symmetrically arranged on the upper and lower inner walls of the front opening of the inner cavity of the control box 1. The two sliding strips 203 on the upper and lower sides of the box door 202 are slidably installed in the sliding grooves 204 on the upper and lower inner walls of the front opening of the inner cavity of the control box 1. A magnetic strip 205 is fixedly installed on the inner wall of the box door 202. The box body of the detection box 2 is made of stainless steel that can attract magnets. When the left side of the magnetic strip 205 and the detection box... When the left inner walls of the control box 1 and the test box 2 are in contact, the door 202 completely covers and seals the front opening of the inner cavity of the control box 1. When the right side of the magnet strip 205 and the right inner wall of the test box 2 are in contact, the door 202 completely opens the front opening of the inner cavity of the control box 1. A vacuum glass observation window 206 is fixedly connected inside the door 202. A heating wire or anti-fog coating is fixedly installed around the vacuum glass observation window 206 of the door 202 to prevent fogging on the glass surface from affecting observation during high and low temperature tests. In addition, an auxiliary handle is fixedly installed on the outer end face of the door 202 for easy opening and closing by the operator. A sealing rubber strip is added to the edge of the door 202 to further enhance the sealing performance and ensure the stability of the internal temperature of the test box 2 during high and low temperature tests.

[0042] refer to Figure 4 The clamping mechanism 3 is mainly composed of a hydraulic cylinder 301, two guide cylinders 302, two guide columns 303, a pressure plate 304, and a rubber pad 305. The two guide cylinders 302 are respectively arranged parallel to each other on both sides of the hydraulic cylinder 301. The two guide cylinders 302 and the hydraulic cylinder 301 are vertically fixed to the top surface of the detection box 2. The piston rod in the hydraulic cylinder 301 is set vertically downward. The top ends of the two guide columns 303 are vertically telescopically installed in the two guide cylinders 302. The lower ends of the two guide columns 303 and the end of the piston rod in the hydraulic cylinder 301 are vertically fixed to the upper surface of the pressure plate 304. The pressure plate 304 is set directly above the push cylinder placement platform 201. The upper surface of the rubber pad 305 and the upper surface of the pressure plate 304 are attached to each other.

[0043] As is well known, gear-driven electric cylinders are generally rectangular in shape. One side of the cylinder body is placed against the flat rear inner wall of the testing box 2, and it is in contact with the upper surface of the cylinder pusher platform 201. The push rod of the gear-driven electric cylinder is then placed horizontally to the right along the cylinder pusher platform 201. The piston rod in the hydraulic cylinder 301 moves vertically downwards, pushing the pressure plate 304 to drive the rubber pad 305, thus fixing and pressing the cylinder body of the gear-driven electric cylinder onto the cylinder pusher platform 201. If the cylinder body of the gear-driven electric cylinder to be tested is not a regular rectangular shape, a rectangular clamp can be used to clamp it. The cylinder body of the gear-driven electric cylinder is held in place, and then the hydraulic cylinder 301 is used to drive the pressure plate 304 to drive the rubber pad 305 to fix the cylinder body of the gear-driven electric cylinder in the fixture onto the cylinder placement platform 201. In addition to using a cuboid clamp for fixing, a set of replaceable and adjustable clamping fixtures can be designed. The fixture is equipped with claws or grooves of various shapes and sizes. Through simple methods such as screw adjustment and dovetail groove sliding, it can quickly adapt to electric cylinder bodies of different shapes and sizes, and ensure the firmness and centering of the clamping, so that the gear-driven electric cylinder will not be displaced or deviated during the testing process, which would affect the accuracy of the test results.

[0044] refer to Figure 4 Since the gear-driven electric cylinder needs to be tested in a high-temperature environment later, in order to reduce the impact of the high-temperature environment on the hydraulic cylinder 301, the present invention encloses and fixes a heat insulation cover 306 around the cylinder body of the hydraulic cylinder 301. The upper end of the heat insulation cover 306 passes through the top of the test box 2. The heat insulation cover 306 and the test box 2 are connected in a closed manner. Furthermore, a number of heat dissipation holes 307 are densely arranged on the outer ring of the top of the heat insulation cover 306. The heat dissipation holes 307 are located above the test box 2. In addition, a small cooling fan can be fixedly installed on the top of the heat insulation cover 306 to actively dissipate the heat generated by the hydraulic cylinder 301 during operation. At the same time, heat dissipation fins are added inside the heat insulation cover 306 to increase the heat dissipation area and improve the heat dissipation efficiency, further reducing the impact of the high-temperature environment on the hydraulic cylinder 301 and ensuring its long-term stable operation.

[0045] refer to Figure 5The load assembly 4 is suspended on the right side of the pusher placement platform 201 in the test box 2. It is mainly used to test the radial force on the end of the push rod in the gear-driven electric cylinder. In this invention, the end of the push rod in the gear-driven electric cylinder is coaxially fixedly connected to a screw. The load assembly 4 is mainly composed of an internal threaded cylinder 401, two rings 402, and several counterweights 404. The internal threaded cylinder 401 is threaded onto the screw at the end of the push rod in the gear-driven electric cylinder. The two rings 402 are rotatably mounted on both sides of the internal threaded cylinder 401, and a rectangular frame 403 is fixedly mounted on the lower side of each of the two rings 402. The width of the counterweight 404 is the same as the inner width of the rectangular frame 403, and two opposing counterweights are arranged on the lower sides of the counterweight 404. The lower edges of the two rectangular frames 403 are respectively fitted into the inner cavities of the two slots 405 below the counterweight 404. That is, the counterweight 404 can be installed below the two rectangular frames 403 below the internal thread cylinder 401 by fitting into the two slots 405 below it. Secondly, two mutually symmetrical positioning blocks 406 are fixedly connected to the upper sides of the counterweight 404, and the positions of the two positioning blocks 406 on the counterweight 404 correspond to the positions of the two slots 405 on the counterweight 404. This is mainly used to quickly and vertically engage the two counterweights 404 together. The more counterweights 404 placed in the two rectangular frames 403 below the internal thread cylinder 401, the greater the radial pressure on the end of the push rod in the gear-driven electric cylinder.

[0046] refer to Figure 1 , Figure 2 and Figure 4 The housings of two industrial cameras 5 are fixedly installed on the outer side of the rear wall of the inspection box 2. The lenses of the two industrial cameras 5 are set inside the inspection box 2, and the lenses of the industrial cameras 5 are forward-facing, pointing towards the push rod in the gear-driven electric cylinder. They are mainly used to acquire images of the push rod in the gear-driven electric cylinder in real time to detect whether the push rod is bent. In addition to acquiring images of the push rod in the gear-driven electric cylinder in real time, the industrial cameras 5 are also equipped with corresponding image analysis software. The software has a built-in image recognition algorithm that can automatically determine whether the push rod is bent and the degree and location of the bend. These analysis results are fed back to the programmable controller in the control box 1 in real time to realize automated push rod status monitoring and fault warning functions. At the same time, a ring light panel is added to the inner top surface of the inspection box 2 to assist the illumination of the industrial cameras 5, ensuring that the images of the push rod can be clearly acquired under different lighting conditions inside the inspection box 2, especially when fog or other conditions may affect the light during high-temperature testing.

[0047] refer to Figure 1 and Figure 2The vibration motor 6 is installed on the top of the test box 2 and is mainly used to simulate the vibration state of the test box 2. It is used to detect the gear-driven electric cylinder under vibration. The vibration motor 6 should have wide bandwidth and high-precision vibration frequency and amplitude adjustment functions. It can be connected to the programmable controller in the control box 1 to accurately output the required vibration parameters according to different preset test conditions. At the same time, flexible connection methods such as elastic couplings can be used at the connection between the vibration motor 6 and the test box 2 to reduce rigid impact during vibration transmission, avoid unnecessary damage to the test box 2 and other internal components, and help improve the accuracy of vibration simulation.

[0048] refer to Figure 1 and Figure 2 Several rubber vibration isolators 7 are arranged in a dense matrix. The test box 2 is rectangular in shape. The test box 2 is installed on top of the control box 1 by several rubber vibration isolators 7. The upper and lower ends of the rubber vibration isolators 7 are fixedly connected to the test box 2 and the control box 1, respectively. The rubber vibration isolators 7 are of the same model and size. In a static state, the rubber vibration isolators 7 can stably place the test box 2 horizontally on the control box 1. This is mainly used to reduce the interference of external vibration on the test process inside the test box 2 and the influence of the test box 2's own vibration motor 6 on the control box 1 when it is working.

[0049] refer to Figure 6An air heating chamber 207 is provided inside the cylinder pusher placement platform 201. An anti-slip pad 208 for placing a gear-driven electric cylinder is fitted onto the top of the cylinder pusher placement platform 201. A high-temperature simulation mechanism 8 is located inside the air heating chamber 207. The high-temperature simulation mechanism 8 mainly consists of two air filters 801, a square cylinder 802, several electric heating wires 803, and several cooling fans 804. Furthermore, several air inlets 209 are densely arranged on the right side of the air heating chamber 207 in the cylinder pusher placement platform 201. The vent 209 is mainly used to connect the air heating chamber 207 and the inner cavity of the detection box 2. The outer walls of the two air filters 801 are respectively and fixedly connected to both sides of the air heating chamber 207 in the cylinder placement platform 201. The square tube 802 is placed between the two air filters 801, and the outer wall of the square tube 802 is fixedly connected to the inner wall of the air heating chamber 207 in the cylinder placement platform 201. The left and right openings of the square tube 802 are respectively aligned with the two air filters 801, and several electric... Heating wires 803 are densely arranged inside a square tube 802. Several cooling fans 804 are located on the left side of two air filters 801 and are fixedly installed on the upper left side of the push cylinder placement platform 201. They are mainly used to draw air from the air heating chamber 207 and discharge it into the detection box 2, and to draw air from the detection box 2 into the air heating chamber 207, so as to realize the circulation of air in the detection box 2 and the air heating chamber 207. The circulating air has a more uniform air temperature distribution. When the circulating air flows through the inner cavity of the square tube 802 in the air heating chamber 207, the several energized electric heating wires 803 in the square tube 802 can actively heat the air in contact with it. It needs to be used with an intelligent temperature controller 9. For the air filters 801, filter elements with high efficiency filtration and low resistance characteristics can be selected. The function of regularly reminding to replace the filter elements can also be integrated into the control system of the control box 1 to ensure that the air entering the air heating chamber 207 and the detection box 2 is clean and to avoid dust and other impurities from affecting the normal operation of the electric heating wires 803.

[0050] refer to Figure 7 and Figure 8An exhaust guide box 805 is fixedly connected to the upper left side of the air heating chamber 207 in the cylinder placement platform 201. The inner opening of the exhaust guide box 805 is connected to the periphery of several cooling fans 804. Several strip-shaped exhaust holes 806 are provided on the right end face of the exhaust guide box 805. The strip-shaped exhaust holes 806 are arranged parallel to each other at equal intervals, and the inner width of the strip-shaped exhaust holes 806 is the same. The exhaust guide box 805 is mainly used to initially mix the air discharged from the several cooling fans 804, because several air inlets 209 in the air heating chamber 207 are located at... On the right side of the cylinder placement platform 201, if the inner height of several strip-shaped exhaust holes 806 is consistent, the air discharged from the lower strip-shaped exhaust hole 806 is more easily attracted and flows, while the air flow at the top is poor. Therefore, the lower the inner height of several strip-shaped exhaust holes 806, the smaller the relative inner height, that is, the larger the inner size of the upper strip-shaped exhaust hole 806. The air in the exhaust guide box 805 is more inclined to be discharged from the upper exhaust hole 806. Combined with the attraction of several strip-shaped exhaust holes 806 and the lift of hot air relative to cold air, the heat in the inner cavity of the detection box 2 is more evenly distributed.

[0051] refer to Figure 1 and Figure 2 The intelligent temperature controller 9 is fixedly installed on the top of the test chamber 2. The probe of the temperature sensor in the intelligent temperature controller 9 is set in the inner cavity of the test chamber 2 to monitor the temperature in the inner cavity of the test chamber 2 in real time. The intelligent temperature controller 9 is mainly used to control the on and off of the circuits in several electric heating wires 803. It also has the function of recording and analyzing temperature curves, plotting the temperature changes during each high and low temperature test into curves, which is convenient for subsequent viewing and analysis of test data. At the same time, it performs precise temperature adjustment according to the preset temperature error range to ensure that the temperature control accuracy is within the allowable range and meets the strict test standard requirements.

[0052] In this embodiment, the programmable logic controller (PLC) is the control core of the entire reliability testing device for the gear-driven electric cylinder. It has pre-written control programs corresponding to various testing procedures. The control program writing and testing procedure settings are as follows:

[0053] 1) Program Architecture Basics

[0054] Programmable logic controllers (PLCs) are programmed using specialized programming software. Their program architecture is typically built using programming languages ​​such as ladder diagrams, statement lists, or function block diagrams. For the control program of this reliability testing device for gear-driven electric cylinders, different functional modules are first divided, corresponding to various stages such as high and low temperature testing, vibration testing, and other related testing operations. Each module has clear logic and execution order to ensure that the entire testing process proceeds in an orderly manner.

[0055] 2) High-temperature testing phase

[0056] The program sets the trigger conditions for starting the low-temperature test. For example, the operator can press the "Start High-Temperature Test" button on the control panel 101 or trigger it according to the preset timed start mechanism. Once triggered, the programmable controller will send control signals to the relevant components in the high-temperature simulation mechanism 8. First, it controls the cooling fan 804 to start, so that it runs at a certain speed to draw air from the test chamber 2 into the air heating chamber 207. The programmable controller will control the electric heating wire 803 to start heating according to the program logic, gradually increasing the power of the electric heating wire 803, so that the air in the air heating chamber 207 is heated rapidly. The hot air is circulated into the test chamber 2 under the drive of the cooling fan 804, which raises the temperature inside the chamber. Similarly, the programmable controller continuously receives temperature sensor signals and compares them with the preset high-temperature target value, and precisely adjusts the power of the electric heating wire 803 and the speed of the cooling fan 804, etc., until the temperature inside the test chamber 2 stabilizes within the high-temperature target range, and begins the testing and data acquisition of the gear-driven electric cylinder performance under high-temperature conditions.

[0057] Furthermore, a small air conditioning unit, which is used for refrigeration in the prior art, can also be fixedly installed on one side of the square tube 802 between the two air filters 801, as long as it is used to refrigerate the test box 2 and test the gear-driven electric cylinder in a low-temperature environment, or perform low-temperature and high-temperature cycle tests.

[0058] 3) Parameter initialization

[0059] Before starting the vibration test, the operator can set key parameters such as the vibration frequency, amplitude and test duration of the vibration motor 6 in the programmable logic controller program through the control panel 101. The programmable logic controller stores these settings and uses them as the basis for subsequent control and judgment.

[0060] Vibration Start and Control: When the "Vibration Test Start" button is pressed, the programmable controller sends a start signal to the vibration motor 6. At the same time, according to the set vibration frequency and amplitude parameters, the built-in control algorithm precisely controls the working state of the vibration motor 6 to produce vibration that meets the requirements. During the vibration process, the programmable controller will monitor the vibration time in real time and compare it with the preset test duration. When the set duration is reached, it will automatically send a signal to stop the vibration motor 6 and complete the vibration test.

[0061] 4) Industrial camera image acquisition coordination

[0062] The programmable logic controller (PLC) works in conjunction with two industrial cameras 5. It sets parameters such as the shooting interval and shooting duration for the industrial cameras 5. During the entire detection process, it sends trigger signals to the industrial cameras 5 according to the set time rhythm, so that they can capture images of the push rod in the gear-driven electric cylinder. Then, it receives the image data signals returned by the industrial cameras 5 and passes these data to the subsequent image analysis module for processing to determine whether the push rod has bent or other abnormalities.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A reliability testing device for a gear-driven electric cylinder experiment, characterized by: The utility model relates to a kind of gear drive type electric cylinder detection device, including control box (1), detection box (2), the clamping mechanism (3) for fixing gear drive type electric cylinder cylinder body, load assembly (4), the industrial camera (5) for monitoring detection process, the vibration motor (6) for providing vibration source, high temperature simulation mechanism (8) for simulating high temperature environment and intelligent temperature controller (9); The detection box (2) is connected with the control box (1), and the detection box (2) is internally provided with a cylinder pushing placement table (201) for horizontally placing the gear drive type electric cylinder cylinder body. The cylinder pushing placement table (201) has an air heating cavity (207), and a plurality of air inlet holes (209) are densely arranged on the right side of the air heating cavity (207). The clamping mechanism (3) is installed above the cylinder pushing placement table (201) in the detection box (2), and the load assembly (4) is vertically hung on the end of the gear drive type electric cylinder pushing rod on the right side of the cylinder pushing placement table (201) in the detection box (2), for detecting the working condition of the radial stress of the end of the pushing rod in the gear drive type electric cylinder. The industrial camera (5), the vibration motor (6) and the intelligent temperature controller (9) are fixedly connected with the control box (1), and the lens of the industrial camera (5) faces the pushing rod in the gear drive type electric cylinder. The high temperature simulation mechanism (8) comprises an air filter (801), a square tube (802), a plurality of electric heating wires (803) and a plurality of heat dissipation fans (804). The outer walls of the two air filters (801) are fixedly connected in the air heating cavities (207) in a closed manner. The square tube (802) is arranged between the two air heating cavities (207), and the outer wall of the square tube (802) and the inner wall of the air heating cavity (207) are fixedly connected in a closed manner. The left and right openings of the square tube (802) are aligned with the two air filters (801) respectively, and the plurality of electric heating wires (803) are densely arranged in the square tube (802). The plurality of heat dissipation fans (804) are arranged on the left side of the two air filters (801), and the heat dissipation fans (804) are fixedly connected with the cylinder pushing placement table (201). An exhaust guide box (805) is fixedly and communicatively connected to the left side of the air heating cavity (207), and the inner cavity opening of the exhaust guide box (805) is communicatively arranged on the periphery of the plurality of heat dissipation fans (804). A plurality of strip-shaped exhaust holes (806) are arranged on the right side end surface of the exhaust guide box (805). The plurality of strip-shaped exhaust holes (806) are sequentially and equidistantly arranged in parallel. The inner widths of the plurality of strip-shaped exhaust holes (806) are consistent. The load assembly (4) comprises an internally threaded cylinder (401), two circular rings (402), two rectangular frames (403) and a plurality of counterweights (404), the internally threaded cylinder (401) is threadedly mounted on a screw rod at the end of a push rod of a gear transmission type electric cylinder, the two circular rings (402) are rotatably mounted on the two sides of the internally threaded cylinder (401) respectively, and the two rectangular frames (403) are fixedly mounted on the lower sides of the two circular rings (402) respectively, the width of the counterweight (404) is the same as the inner width of the rectangular frame (403), two symmetric clamping grooves (405) are arranged on the lower sides of the counterweight (404), the lower frames of the two rectangular frames (403) are respectively embedded in the inner cavities of the two clamping grooves (405) on the lower sides of the counterweight (404), and two symmetric positioning blocks (406) are fixedly connected to the upper sides of the counterweight (404), and the positions of the two positioning blocks (406) on the counterweight (404) correspond to the positions of the two clamping grooves (405) on the counterweight (404) respectively.

2. The reliability test device for a gear-driven electric cylinder experiment according to claim 1, characterized by: The clamping mechanism (3) comprises a hydraulic oil cylinder (301), two guide cylinders (302), two guide columns (303) and a pressing plate (304), a rubber pad (305) is arranged on the lower surface of the pressing plate (304), the two guide cylinders (302) are arranged on the two sides of the hydraulic oil cylinder (301) respectively, the cylinder body in the hydraulic oil cylinder (301) and the two guide cylinders (302) are all fixedly connected with the top surface of the detection box (2) perpendicularly, the upper ends of the two guide columns (303) are vertically and telescopically arranged in the two guide cylinders (302) respectively, and the lower ends of the two guide columns (303) and the lower end of the piston rod in the hydraulic oil cylinder (301) are all fixedly connected with the upper surface of the pressing plate (304) perpendicularly.

3. The gear-driven electro-hydraulic cylinder experimental reliability testing device according to claim 2, characterized in that: The outer periphery of the cylinder body in the hydraulic oil cylinder (301) is fixedly connected with a heat shield (306), the heat shield (306) is provided with heat dissipation holes (307), the heat dissipation holes (307) are higher than the top surface of the detection box (2), and the heat shield (306) is fixedly connected with the detection box (2).

4. The reliability test device for a gear-driven electro-hydraulic cylinder experiment according to claim 1, characterized in that: A box door (202) is slidably arranged on one side of the detection box (2), slide block strips (203) are fixedly connected to the upper and lower sides of the box door (202), and slide grooves (204) are arranged on the upper and lower sides of the opening on the front side of the inner cavity of the detection box (2), and the box door (202) is slidably connected with the inner cavities of the two slide grooves (204) on the detection box (2) through the two slide block strips (203).

5. The reliability test device for a gear-driven electric cylinder experiment according to claim 1, characterized by: A plurality of rubber vibration isolators (7) are arranged in a matrix dense arrangement between the upper surface of the control box (1) and the lower bottom surface of the detection box (2), and a control panel (101) is arranged on one side of the control box (1).

6. The gear-driven electro-hydraulic cylinder experimental reliability testing device according to claim 4, characterized in that: A magnet strip (205) is fixedly connected to the inner side end surface of the box door (202), and the box body of the detection box (2) is made of stainless steel which can attract magnets.

7. The reliability test device for a gear-driven electric cylinder experiment according to claim 4, characterized by: A vacuum glass observation window (206) is fixedly connected to the box door (202).

8. The reliability test device for a gear-driven electro-hydraulic cylinder experiment according to claim 1, characterized in that: The pushing cylinder placing table (201) is provided with an antiskid pad (208) on the upper surface.

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