Pneumatic rod fatigue testing apparatus

Abstract

The utility model discloses a kind of pneumatic rod fatigue test equipment, comprising: equipment box;Two slide bars, slide bar is placed in the top of the equipment box, the outside of the slide bar is fixedly connected with the fixed plate for supporting fixed pneumatic rod;Pressing part, pressing part lifting is placed in the outside of the slide bar, the pressing part includes lifting plate and the screw rod of driving lifting plate movement, the bottom of the lifting plate is provided with pressing sleeve, pressure sensor is installed above the pressing sleeve, the beneficial effects of the utility model are: by comparing the pressure value of specified height with preset value, whether the upward reset of pneumatic rod reaches specified position can be accurately judged, pneumatic rod fatigue problem is found in time, setting knock vibration part, can adjust knock ball position to make it contact with pneumatic rod, under the driving of screw rod, fixed plate is repeatedly knocked, simulate the vibration generated to pneumatic rod when seat moves, further detect the performance of pneumatic rod in vibration environment, test function is more comprehensive.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic rod fatigue testing technology, specifically a pneumatic rod fatigue testing device. Background Technology

[0002] Pneumatic rods, as important mechanical components, are widely used in many fields, especially in seat adjustment systems. Their compact structure, ease of operation, and ability to provide stable support make them key components for functions such as seat height and angle adjustment. Fatigue performance is one of the key indicators of quality in the production and use of pneumatic rods. Because pneumatic rods need to frequently extend and retract during actual operation, and are subjected to various vibrations and impacts during seat movement, their internal structure and materials gradually suffer fatigue damage under prolonged exposure to these conditions. This leads to performance degradation, such as uneven extension and retraction, inaccurate reset, and weakened support force, and in severe cases, may even cause safety accidents. Therefore, rigorous fatigue testing of pneumatic rods, simulating various working conditions in actual use and detecting performance changes under repeated extension, retraction, and vibration environments, is crucial for ensuring the quality and reliability of pneumatic rods. However, currently available pneumatic rod testing equipment has relatively limited functionality, mostly only capable of simple extension and retraction tests, unable to comprehensively simulate the vibration conditions experienced by pneumatic rods in actual use, and therefore unable to accurately assess their fatigue performance in complex environments. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic rod fatigue testing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic rod fatigue testing device, comprising:

[0005] Equipment box;

[0006] Two sliding rods are placed on top of the equipment box, and a fixing plate for supporting and fixing the pneumatic rod is fixed to the outside of the sliding rods;

[0007] The pressing part is raised and lowered on the outside of the slide bar. The pressing part includes a lifting plate and a lead screw that drives the lifting plate to move. A pressing sleeve is provided at the bottom of the lifting plate, and a pressure sensor is installed above the pressing sleeve.

[0008] A striking and oscillating part is located on the outside of the lead screw. The striking and oscillating part includes a striking ball installed on the bottom side of the lead screw for striking and oscillating the pneumatic rod.

[0009] Preferably, a top plate is fixedly connected to the top of the two slide rods, and a servo motor is fixedly connected to the top of the top plate. The output end of the servo motor is connected to the lead screw drive via a coupling.

[0010] Preferably, the lead screw is threaded to a drive slider, the drive slider is fixedly connected to the lifting plate, the bottom of the lifting plate is fixedly connected to a connecting block, a support block is slidably connected to one side of the connecting block, the top of the support block is fixedly connected to a guide rod that is slidably connected to the connecting block, and a spring is sleeved on the outside of the guide rod.

[0011] Preferably, the pressure sensor is fixed to the bottom of the connecting block and is located between the connecting block and the support block, and the pressing sleeve is fixed to the bottom of the support block.

[0012] Preferably, the fixing plate has a groove in the middle for installing a pneumatic rod, a limit block is installed inside the groove, one end of the limit block is fixedly connected to a notch, and the fixing plate has a through hole in the middle for cooperating with the limit rod.

[0013] Preferably, the limiting block has a notch one on one side and the fixing plate has a notch two in the middle. When the limiting block is engaged with the groove, notch one and notch two form a complete circular hole, and notch two can be detachably installed in the circular hole.

[0014] Preferably, the striking vibration part further includes a fixed sleeve fixed to the outside of the lead screw, a threaded tube fixed to the outside of the fixed sleeve, a threaded rod threadedly connected to the inside of the outside of the threaded tube, a second spring fixed to the end of the threaded rod, and the striking ball fixed to the end of the second spring.

[0015] Compared with existing technologies, the advantages of this utility model are as follows: The screw reversing forward and reverse rotation drives the lifting plate to move up and down along the slide bar, causing the pressing sleeve to press the start valve at the top of the pneumatic rod, thus achieving the reciprocating extension and retraction test of the telescopic rod. This simulates the repeated extension and retraction of the pneumatic rod in actual use. Equipped with a pressure sensor, it continuously detects the corresponding pressure during the downward and upward movement of the lifting plate. By comparing the pressure value at a specified height with the preset value, it can accurately determine whether the pneumatic rod has reached the specified position for upward reset, promptly identifying pneumatic rod fatigue issues. A striking and oscillating part is included, allowing adjustment of the striking ball position to contact the pneumatic rod. Under the drive of the screw, the fixed plate is repeatedly struck, simulating the vibration generated on the pneumatic rod during seat movement, further testing the performance of the pneumatic rod under oscillation conditions, making the testing function more comprehensive. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a schematic diagram of the position structure of the servo motor of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fixing plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting block of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the fixing sleeve of this utility model;

[0021] Figure 6 This is a schematic diagram of the pressing sleeve of this utility model.

[0022] In the diagram: 1. Equipment box; 2. Striking ball; 3. Slide rod; 4. Lifting plate; 5. Top plate; 6. Servo motor; 7. Lead screw; 8. Fixing plate; 9. Limiting block; 10. Limiting rod; 11. Notch 1; 12. Notch 2; 13. Fixing pin; 14. Connecting block; 15. Support block; 16. Pressing sleeve; 17. Pressure sensor; 18. Guide rod; 19. Spring 1; 20. Fixing sleeve; 21. Threaded tube; 22. Threaded rod; 23. Spring 2. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this utility model provides a technical solution: a pneumatic rod fatigue testing device, comprising: an equipment box 1; a slide rod 3 fixedly connected to the top of the box 1, and a fixing plate 8 for supporting and fixing the pneumatic rod fixedly connected to the outside of the slide rod 3; a pressing part is raised and lowered outside the slide rod 3, the pressing part including a lifting plate 4 and a lead screw 7 for driving the lifting plate 4 to move, the lifting plate 4 being slidably connected to the slide rod 3 through a linear bearing, a pressing sleeve 16 being provided at the bottom of the lifting plate 4, and a pressure sensor 17 being installed above the pressing sleeve 16; a striking and vibrating part is placed outside the lead screw 7, the striking and vibrating part including a striking ball 2 installed on the bottom side of the lead screw 7, the striking ball 2 being made of rubber and used to strike and vibrate the pneumatic rod.

[0025] It should be noted that in this embodiment, a PLC controller is provided, and an operation switch and display are provided on the top of the equipment box 1. The pneumatic rod is placed in the middle of the fixed plate 8. The forward and reverse rotation of the lead screw 7 drives the lifting plate 4 to move up and down along the slide bar 3. During the descent of the lifting plate 4, the pressing sleeve 16 presses the start valve on the top of the pneumatic rod. At this time, the pneumatic rod is in the unlocking device. The pressing sleeve 16 presses the telescopic rod downward. After reaching the preset position, the lead screw 7 reverses and drives the lifting plate 4 to move upward. At this time, the pressing sleeve 16 continuously presses the start valve, causing the telescopic rod to move upward with the lifting plate 4. This operation is repeated to control the telescopic rod. When the rod is subjected to reciprocating extension and retraction tests, it needs to be struck and vibrated to simulate the vibration generated on the pneumatic rod during seat movement. By adjusting the position of the striking ball 2 so that it contacts the pneumatic rod, the fixed plate 8 is repeatedly struck under the drive of the lead screw 7. During the downward and upward movement, the pressure sensor 17 continuously detects the corresponding pressure. By checking whether the pressure value at the specified height is the same as the preset value, if the pressure provided by the extension rod is less than the preset value when the lifting plate 4 returns to the specified height within a certain period of time, it indicates that the pneumatic rod has not reached the specified position when returning to the upward position. At this time, the controller controls the corresponding audible and visual alarm to remind the user.

[0026] In one embodiment, a top plate 5 is fixedly connected to the top of the two slide rods 3, and a servo motor 6 is fixedly connected to the top of the top plate 5. The output end of the servo motor 6 is connected to the lead screw 7 via a coupling. A drive slider is threadedly connected to the outside of the lead screw 7, and the drive slider is fixedly connected to the lifting plate 4.

[0027] It should be noted that in this embodiment, the servo motor 6 is equipped with an encoder and connected to the PLC controller. The servo motor 6 drives the lead screw 7 to rotate in both directions, thereby causing the lifting plate 4 to move up and down along the slide bar 3 via the lead screw 7 driving the slider. A connecting block 14 is fixedly connected to the bottom of the lifting plate 4. A support block 15 is slidably connected to one side of the connecting block 14. A guide rod 18 is fixedly connected to the top of the support block 15 and slidably connected to the connecting block 14. A spring 19 is sleeved on the outside of the guide rod 18. A pressure sensor 17 is fixedly connected to the bottom of the connecting block 14 and is located between the connecting block 14 and the support block 15. A pressing sleeve 16 is fixedly connected to the bottom of the support block 15. When the lifting plate 4 drives the connecting block 14 to move downward, the connecting block 14 presses against the pressure sensor 17. The pressure sensor 17 is pressed against the pressing sleeve 16 through the support block 15. After the pressing sleeve 16 presses against the start valve, it presses the telescopic rod downward. During the descent, under the reaction force, the pressure sensor 17 detects the upward thrust of the pneumatic rod. When the lifting plate 4 moves downward to the specified height, if the pneumatic rod does not return to the specified height, the pressure it generates on the pressure sensor 17 will decrease. This can be used to determine that the pneumatic rod is fatigued and has not returned to the corresponding height. The product quality can be judged based on the test time.

[0028] In one embodiment, a groove for installing a pneumatic rod is provided in the middle of the fixing plate 8. A limiting block 9 is installed inside the groove. One end of the limiting block 9 is fixedly connected to a notch 11. A through hole that mates with the limiting rod 10 is provided in the middle of the fixing plate 8. A notch 11 is provided on one side of the limiting block 9. A notch 2 12 is provided in the middle of the fixing plate 8. When the limiting block 9 mates with the groove, notch 11 and notch 2 12 form a complete circular hole. Notch 2 12 is detachably installed inside the circular hole.

[0029] It should be noted that, in this embodiment, when installing the pneumatic rod, the pneumatic rod is placed in the groove on the top of the equipment box 1, and the middle part of the pneumatic rod is placed in the middle of the fixing plate 8. The limiting rod 1 at one end of the limiting block 9 is inserted into the corresponding side through hole of the fixing plate 8, so that the limiting block 9 and the fixing plate 8 limit the pneumatic rod. When the first notch 11 corresponds to the second notch 12, the first notch 11 and the second notch 12 form a complete circular hole. At this time, the fixing pin 13 is inserted into the circular hole to prevent the limiting block 9 from separating from the fixing plate 8.

[0030] In one embodiment, the striking vibration part further includes a fixed sleeve 20 fixed to the outside of the lead screw 7. A threaded tube 21 is fixed to the outside of the fixed sleeve 20. A threaded rod 22 is threadedly connected to the inside of the outside of the threaded tube 21. A second spring 23 is fixed to the end of the threaded rod 22. The striking ball 2 is fixed to the end of the second spring 23.

[0031] It should be noted that, in this embodiment, when the pneumatic rod is subjected to impact vibration, the threaded rod 22 is rotated so that it emerges from the inside of the threaded tube 21. Then, the nut on the outside of the threaded rod 22 is rotated to the end of the threaded tube 21. In this way, the fixed sleeve 20 is rotated during the rotation of the screw 7. The fixed sleeve 20 drives the spring 23 to rotate through the threaded tube 21 and the threaded rod 22. The spring 23 drives the striking ball 2 to contact the pneumatic rod, thereby achieving impact vibration of the pneumatic rod. This allows for testing its vibration performance.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0033] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection 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.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic rod fatigue testing device, characterized in that: include: Equipment box (1); Two slide rods (3) are placed on the top of the equipment box (1), and a fixing plate (8) for supporting and fixing the pneumatic rod is fixed to the outside of the slide rod (3); The pressing part is raised and lowered on the outside of the slide bar (3). The pressing part includes a lifting plate (4) and a screw (7) that drives the lifting plate (4) to move. A pressing sleeve (16) is provided at the bottom of the lifting plate (4), and a pressure sensor (17) is installed above the pressing sleeve (16). The striking and oscillating part is located on the outside of the lead screw (7). The striking and oscillating part includes a striking ball (2) installed on the bottom side of the lead screw (7) for striking and oscillating the pneumatic rod.

2. The pneumatic rod fatigue testing device according to claim 1, characterized in that: A top plate (5) is fixedly connected to the top of the two slide rods (3), and a servo motor (6) is fixedly connected to the top of the top plate (5). The output end of the servo motor (6) is connected to the lead screw (7) through a coupling.

3. The pneumatic rod fatigue testing device according to claim 1, characterized in that: The lead screw (7) is threaded to a drive slider, which is fixedly connected to the lifting plate (4). The bottom of the lifting plate (4) is fixedly connected to a connecting block (14), and a support block (15) is slidably connected to one side of the connecting block (14). The top of the support block (15) is fixedly connected to a guide rod (18) that is slidably connected to the connecting block (14). A spring (19) is sleeved on the outside of the guide rod (18).

4. The pneumatic rod fatigue testing device according to claim 3, characterized in that: The pressure sensor (17) is fixed to the bottom of the connecting block (14) and the pressure sensor (17) is located between the connecting block (14) and the support block (15). The pressing sleeve (16) is fixed to the bottom of the support block (15).

5. The pneumatic rod fatigue testing device according to claim 1, characterized in that: The fixing plate (8) has a groove in the middle for installing a pneumatic rod. A limiting block (9) is installed inside the groove. One end of the limiting block (9) is fixedly connected to a notch (11). The fixing plate (8) has a through hole in the middle that cooperates with the limiting rod (10).

6. The pneumatic rod fatigue testing device according to claim 5, characterized in that: The limiting block (9) has a notch 1 (11) on one side and a notch 2 (12) in the middle of the fixing plate (8). When the limiting block (9) is engaged with the groove, the notch 1 (11) and the notch 2 (12) form a complete circular hole. The notch 2 (12) can be detachably installed in the circular hole.

7. The pneumatic rod fatigue testing device according to claim 1, characterized in that: The striking vibration part also includes a fixed sleeve (20) fixed to the outside of the lead screw (7). A threaded tube (21) is fixed to the outside of the fixed sleeve (20). A threaded rod (22) is threaded to the inside of the outside of the threaded tube (21). A second spring (23) is fixed to the end of the threaded rod (22). The striking ball (2) is fixed to the end of the second spring (23).

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