A reciprocating piston fatigue life test device

Abstract

The invention discloses a reciprocating piston fatigue life test device, which belongs to the technical field of engineering equipment, including a work table and a rotary three-jaw chuck on the top thereof, the work table is equipped with an image collector and a work table, a detection table is slidably connected to the top of the work table, a reciprocating rod provided on the top of the work table is fixed with a plurality of connecting pieces, connecting rods are rotatably connected to both sides of the connecting piece, a piston arranged in a cylinder body is rotatably connected to the connecting rod, a spring fixed to the work table is fixed to the detection table, the detection table is equipped with a clamping device, a transmission device for driving the reciprocating rod to reciprocate in a fan-shaped manner is provided on the top of the work table, the transmission device includes a first rotating rod and a second rotating rod, the transmission device cooperates with the spring to realize the vibration of the detection table, a power device is installed on the work table, the power device includes a transmission gear, and adjusting the position of the transmission gear can drive the three-jaw chuck and the transmission device respectively. The invention can improve the test efficiency, simulate the vibrating working environment, and improve the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of engineering equipment, and in particular to a reciprocating piston fatigue life testing device. Background Art

[0002] The reciprocating piston fatigue life test device is a device specially used to simulate and evaluate the fatigue condition and life of the reciprocating piston in the actual working environment. The piston is a vital component in mechanical equipment such as engines, and its performance reliability directly affects the working efficiency and life of the entire machine. During the working process, the piston reciprocates in the cylinder or pump cylinder through the connecting rod under the action of external force. In different usage scenarios, the size of the piston, connecting rod, cylinder or pump cylinder will also vary.

[0003] During the design and manufacturing process of pistons, manufacturers will make pistons of different sizes and materials according to demand. In order to test the fatigue and life of the pistons, two or more pistons need to be tested and compared and analyzed. Traditional testing equipment can only test one piston at a time, while improved equipment can test multiple pistons at the same time, but it cannot test multiple pistons of different sizes at the same time, resulting in long testing time, low efficiency, and difficulty in real-time comparison of test results.

[0004] In actual working conditions, in addition to the loads generated by reciprocating motion, the piston is also affected by the additional loads generated by engine vibration. Vibration accelerates the initiation and expansion of fatigue cracks, thereby shortening the life of the piston. Usually, when testing a piston under vibration conditions, the piston to be tested is fixed on a vibration table and vibrated by a vibration motor to simulate the engine vibration environment. This test method requires an additional vibration motor, which increases the complexity of the device and the test cost.

[0005] Before and after the piston test, piston inspection is required. Piston inspection, as the basis of piston testing, is the prerequisite for ensuring the accuracy of piston test results. Only when the piston's geometric dimensions and appearance are qualified can subsequent piston testing be carried out. After the piston test, it is also necessary to check whether there are cracks, scratches, wear, corrosion and other damage on the piston surface. At present, this test still relies on the human eye for preliminary judgment, which is inefficient and not very accurate. In addition, the piston inspection and piston testing devices are separate, resulting in low equipment utilization. The piston needs to be moved to different devices, which increases the operation time. Summary of the invention

[0006] The purpose of the present invention is to improve the test efficiency, simulate the vibrating working environment, and improve the accuracy of the test results.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a reciprocating piston fatigue life test device, comprising a work table and a rotary three-jaw chuck on the top thereof, the work table is equipped with an image collector and a work table, a detection table is slidably connected to the top of the work table, a reciprocating rod provided on the top of the work table is fixed with a plurality of connecting pieces, connecting rods of the same size are rotatably connected on both sides of the connecting piece, the connecting rods are rotatably connected with a piston arranged in a cylinder body, the farther from the rotation center of the reciprocating rod, the larger the size of the connecting rod, the cylinder body and the piston, the detection table is fixed with a spring fixed to the work table, and the detection table is equipped with a clamping device, which can change its own position and clamp cylinder bodies of different sizes;

[0008] A transmission device is provided on the top of the workbench to drive the reciprocating rod to rotate in a fan shape. The transmission device includes a first rotating rod and a second rotating rod. The transmission device cooperates with a spring to realize the vibration of the detection table. A power device is installed on the workbench. The power device includes a transmission gear. Adjusting the position of the transmission gear can drive the three-jaw chuck and the transmission device respectively.

[0009] As a further description of the above technical solution: the clamping device includes a slide rail fixed on the detection table, a plurality of slide plates slide on the top of the slide rail, a clamping seat slides on the top of the slide plate, and the cylinder body is arranged in a groove on the top of the clamping seat.

[0010] As a further description of the above technical solution: a clamping rod with a cylinder body fixed thereto is threadedly passed through the clamping seat, a first fixing plate is fixed by bolts on the slide rail and on both sides of the slide plate, a second fixing plate is fixed by bolts on the slide plate and on both sides of the clamping seat, the first fixing plate is slidably connected to the slide rail, and the second fixing plate is slidably connected to the slide plate.

[0011] As a further description of the above technical solution: the connecting member can be fixed at any position on the reciprocating rod by bolts, and connecting seats are fixed to the top two sides of the connecting member by bolts, and the connecting seats are rotatably connected to the connecting rod.

[0012] As a further description of the above technical solution: the first rotating rod and the second rotating rod are rotatably connected to the work table, the power device includes a driving motor, the output shaft of the driving motor passes through the work table and is fixed with a main gear, a threaded column for installing a transmission gear is provided on the top of the second rotating rod, the main gear is meshed with the transmission gear, and the first rotating rod and the second rotating rod are driven by a belt.

[0013] As a further description of the above technical solution: a first rotating column rotatably connected to the work table is fixed at the bottom of the three-jaw chuck, a second rotating column rotatably connected to the top of the work table, a threaded column for installing a transmission gear is provided on the top of the second rotating column, and the first rotating column and the second rotating column are driven by a belt.

[0014] As a further description of the above technical solution: the transmission device includes an arc plate and a straight plate connected to each other, the reciprocating rod and the straight plate are rotatably connected to a rotating shaft fixed on the workbench, the top of the first rotating rod passes through the workbench and is fixed with an extension rod, and the convex column at the top of the extension rod extends into the arc hole of the arc plate.

[0015] As a further description of the above technical solution: the straight plate is fixed with a striking rod, the top wall of the inner cavity of the detection platform is fixed with a rectangular plate used in conjunction with the striking rod, and the top of the straight plate is fixed with a transmission rod passing through the reciprocating rod.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. Two pistons of the same size can be rotatably connected through the connecting piece. According to the rule that the farther the distance from the rotation center of the reciprocating rod is, the larger the piston size is, the pistons of different sizes are placed at appropriate positions, so that the connecting piece is fixedly connected to the reciprocating rod. When the reciprocating rod rotates in a fan shape, multiple pistons of different sizes can be driven to perform linear reciprocating motion in the cylinder body, shortening the entire test cycle and improving test efficiency and equipment utilization.

[0018] 2. The reciprocating rod is divided into two sections with its own rotation center as the boundary. The length of each section is equal to the number of connecting parts. Two pistons of the same size are fixed in each section, so that the reciprocating rod can drive four pistons of the same size to perform linear reciprocating motion in the cylinder body. This method can obtain more test data in the same time, reduce errors, improve the accuracy of test results, and more quickly discover common problems existing in the same batch of pistons.

[0019] 3. When pistons of the same size are installed on both sides of the connector, they can reciprocate in the cylinder. This positional relationship enables the staff to directly observe the movement trajectory, speed, vibration, etc. of the pistons, so as to intuitively compare their performance differences. In addition, the two pistons move the same distance, which helps to improve the accuracy of the test data.

[0020] 4. The transmission device converts circular motion into fan-shaped motion, thereby driving the reciprocating rod to perform fan-shaped motion. In addition, the transmission device can also make the test table slide slightly on the workbench and cooperate with the spring to generate slight vibration. This vibration can simulate the additional load on the piston caused by engine vibration, thereby accelerating the generation and expansion of fatigue cracks. By testing the working ability of the piston in extreme environments, its performance can be evaluated.

[0021] 5. By adjusting the position of the transmission gear, the three-jaw chuck and the transmission device can be driven separately. When the transmission gear drives the three-jaw chuck, the piston can rotate, and the image acquisition mechanism can take pictures of the piston at different angles, thereby collecting image information at the corresponding position. This provides a basis for the computer to perform image recognition and judge whether the piston meets the requirements. In addition, through multi-angle imaging, more comprehensive surface information can be obtained, thereby improving the accuracy of defect detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 shows a front view according to the present invention;

[0023] Figure 2 A perspective sectional view of a cylinder according to the present invention is shown;

[0024] Figure 3 A partial top sectional view of a test bench according to the present invention is shown;

[0025] Figure 4 It is shown that according to the present invention Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 A partial cross-sectional view of a work table according to the present invention is shown;

[0027] Figure 6 It is shown that according to the present invention Figure 5 The enlarged view of point B in the middle;

[0028] Figure 7 Shows a cutaway perspective view according to the present invention;

[0029] Figure 8 It is shown that according to the present invention Figure 7 Enlarged view of point C in the middle;

[0030] Fig. 9 A partial top view of a work table according to the present invention is shown;

[0031] Fig.10 A top cross-sectional view of a workbench according to the present invention is shown;

[0032] Fig.11 It is shown that according to the present invention Fig.10 Enlarged view of point D in the middle.

[0033] Legend:

[0034] 10. work table; 11. three-jaw chuck; 111. first rotating column; 112. second rotating column; 12. image collector; 13. work table; 14. testing table; 141. rectangular plate; 15. connecting rod; 16. cylinder body; 17. piston; 18. spring;

[0035] 20. reciprocating rod; 21. connecting piece; 22. connecting seat;

[0036] 30. Clamping device; 31. Slide rail; 32. Slide plate; 33. Clamping seat; 34. Clamping rod; 35. First fixing plate; 36. Second fixing plate;

[0037] 40. Transmission device; 41. First rotating rod; 42. Second rotating rod; 43. Curved plate; 44. Straight plate; 45. Extension rod; 46. Impact rod; 47. Transmission rod;

[0038] 50. Power unit; 51. Transmission gear; 52. Drive motor; 53. Main gear. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 11 The present invention provides a reciprocating piston fatigue life test device, including a work table 10 and a rotary three-jaw chuck 11 connected to the top thereof, the device also includes a piston 17. In addition to being able to clamp and rotate the piston 17, the three-jaw chuck 11 also has the function of adjusting the jaw spacing to adapt to pistons 17 of different shapes, thereby improving the versatility of the device.

[0041] The top of the work table 10 is fixedly connected to an image collector 12 and a workbench 13. The image collector 12 uses a high-resolution camera and a light source, and combines an image processing algorithm to perform fine defect detection on the surface of the piston 17, including microcracks, scratches, and wear.

[0042] A testing platform 14 is slidably connected to the top of the workbench 13. A reciprocating rod 20 is provided on the top of the testing platform 14. A plurality of connecting members 21 are fixed to the reciprocating rod 20 by bolts. Both sides of each connecting member 21 are rotatably connected to connecting rods 15 of the same size. The other end of the connecting rod 15 is connected to a piston 17 arranged in a cylinder body 16. As the distance from the rotation center of the reciprocating rod 20 increases, the sizes of the connecting rod 15, the cylinder body 16 and the piston 17 also increase accordingly.

[0043] During the working process, the three-jaw chuck 11 is used to clamp and fix pistons 17 of different sizes. At the same time, the three-jaw chuck 11 drives the piston 17 to rotate. In conjunction with the image collector 12, the piston 17 can be photographed at various angles and the image information of the corresponding position collected can be transmitted to the computer. The computer uses image acquisition and image processing technology to analyze the defects of the piston 17 to detect whether its quality meets the standards.

[0044] A spring 18 fixed to the workbench 13 is fixed on the testing table 14. The testing table 14 is equipped with a clamping device 30, which can clamp pistons 17 of different sizes. The clamping device 30 can change its own position according to the size of the clamped piston 17. A transmission device 40 is provided on the top of the workbench 13. The transmission device 40 is located in the inner cavity of the testing table 14. The transmission device 40 can convert circular rotation into fan-shaped rotation. The transmission device 40 can drive the reciprocating rod 20 to perform fan-shaped rotation.

[0045] The reciprocating rod 20 is divided into two sections with its own rotation center as the boundary, and the lengths of the two sections are equal to the number of connecting parts 21. During the fan-shaped reciprocating rotation of the reciprocating rod 20, the farther away from the rotation center, the greater the distance that the reciprocating rod 20 drives the connecting rod 15 to move; a connecting rod 15, a cylinder body 16 and a piston 17 of suitable sizes are installed at appropriate positions on the reciprocating rod 20. Through the rotation of the reciprocating rod 20, multiple pistons 17 of different sizes can be driven to perform linear reciprocating motion in the cylinder body 16.

[0046] The transmission device 40 can cooperate with the spring 18 to drive the detection platform 14 to vibrate slightly on the workbench 13. By adjusting the stiffness of the spring 18, the vibration amplitude can be controlled to simulate the vibration load under different working conditions. In addition, the workbench 13 is also equipped with a power device 50, which includes a transmission gear 51. By changing the position of the transmission gear 51, the three-jaw chuck 11 and the transmission device 40 can be driven separately.

[0047] Specifically, when the transmission device 40 drives the reciprocating rod 20 to perform fan-shaped reciprocating motion, the test table 14 can slide slightly on the workbench 13, thereby generating slight vibration, which can simulate the additional load generated by engine vibration and accelerate the initiation and expansion of fatigue cracks.

[0048] Furthermore, the clamping device 30 includes a slide rail 31 fixed on the detection table 14, a plurality of slide plates 32 slide on the top of the slide rail 31, a clamping seat 33 slides on the top of the slide plate 32, and the cylinder body 16 is located in a groove on the top of the clamping seat 33. By moving the slide plate 32 on the slide rail 31 and the clamping seat 33 on the slide plate 32, the position of the cylinder body 16 can be adjusted so that the clamping seat 33 can fix the cylinder body 16 in a suitable position.

[0049] The size and shape of the groove on the top of the clamping seat 33 match the cylinder body 16. Cylinder bodies 16 of different sizes require different clamping seats 33 to be fixed. By replacing different clamping seats 33, cylinder bodies 16 of different sizes can be fixed. The sliding design of the slide plate 32 and the clamping seat 33 makes it easy to adjust the position of the cylinder body 16.

[0050] The thread on the clamping seat 33 passes through the clamping rod 34, and the clamping rod 34 is used to fix the cylinder body 16. When the cylinder body 16 is placed in the groove on the top of the clamping seat 33, the clamping rod 34 can be rotated to fix it on the clamping seat 33 to prevent the cylinder body 16 from detaching from the clamping seat 33 during the test.

[0051] A first fixing plate 35 is fixed to the slide rail 31 by bolts, and the first fixing plate 35 is located on both sides of the slide plate 32. A second fixing plate 36 is fixed to the slide plate 32 by bolts, and the second fixing plate 36 is located on both sides of the clamping seat 33. The first fixing plate 35 is slidably connected to the slide rail 31, and the second fixing plate 36 is slidably connected to the slide plate 32. The first fixing plate 35 and the second fixing plate 36 can fix the slide plate 32 and the clamping seat 33 to prevent displacement and falling off during the test, which affects the test.

[0052] Furthermore, the connecting member 21 can be fixed at any position on the reciprocating rod 20 by bolts. By changing the position of the connecting member 21, the position of the connecting rod 15 can be changed. Connecting seats 22 are fixed to both sides of the top of the connecting member 21 by bolts. The connecting seat 22 is rotatably connected to the connecting rod 15. By replacing connecting seats 22 of different sizes, connecting rods 15 of different sizes can be rotatably connected, thereby improving the practicality of the device. The connecting member 21 and the connecting seat 22 are connected by bolts, which is convenient for disassembly and replacement, and is convenient for maintenance and upgrading.

[0053] Furthermore, the transmission device 40 includes a first rotating rod 41 and a second rotating rod 42, which are rotatably connected to the work table 10, and the power device 50 includes a driving motor 52. The output shaft of the driving motor 52 passes through the work table 10 and is fixed with a main gear 53. A threaded column for installing the transmission gear 51 is provided on the top of the second rotating rod 42. The transmission gear 51 is fixed to the second rotating rod 42 by a nut and the threaded column. The main gear 53 is meshed with the transmission gear 51, and the first rotating rod 41 and the second rotating rod 42 are driven by a belt.

[0054] When the driving motor 52 drives the main gear 53 to rotate, the main gear 53 transmits power to the transmission gear 51, the transmission gear 51 drives the second rotating rod 42 to rotate, and the second rotating rod 42 transmits power to the first rotating rod 41 through the belt.

[0055] Furthermore, a first rotating column 111 rotatably connected to the work table 10 is fixed at the bottom of the three-jaw chuck 11, and a second rotating column 112 rotatably connected to the top of the work table 10. A threaded column for installing the transmission gear 51 is provided on the top of the second rotating column 112, and the first rotating column 111 and the second rotating column 112 are driven by a belt.

[0056] Remove the transmission gear 51 from the second rotating rod 42, and then install the transmission gear 51 on the second rotating column 112, let the driving motor 52 drive the second rotating column 112 to rotate, the second rotating column 112 transmits power to the first rotating column 111 through the belt, and the first rotating column 111 drives the three-jaw chuck 11 to rotate.

[0057] Furthermore, the transmission device 40 includes an arc plate 43 and a straight plate 44 connected to each other, the arc plate 43 and the straight plate 44 are integrally formed, and the reciprocating rod 20 and the straight plate 44 are both rotatably connected to a rotating shaft fixed on the workbench 13, and the reciprocating rod 20 and the straight plate 44 both rotate around this rotating shaft.

[0058] The top of the first rotating rod 41 passes through the workbench 13 and is fixed with an extension rod 45. The convex column on the top of the extension rod 45 extends into the arc-shaped hole of the arc plate 43. When the first rotating rod 41 rotates, the extension rod 45 on the top of the first rotating rod 41 rotates in a circle. The extension rod 45 drives the arc plate 43 to move through the convex column on the top, and the straight plate 44 connected to the arc plate 43 also rotates around the rotating shaft on the workbench 13. Due to the shape of the arc plate 43, when the straight plate 44 rotates a certain distance in one direction, it will rotate the same distance in the opposite direction. At this time, the arc plate 43 and the straight plate 44 make a fan-shaped reciprocating motion.

[0059] The straight plate 44 is fixed with a striking rod 46, and the top wall of the inner cavity of the detection table 14 is fixed with a rectangular plate 141 used in conjunction with the striking rod 46. When the straight plate 44 performs a fan-shaped reciprocating rotation motion, the striking rod 46 will continuously strike the rectangular plate 141. Under the action of this impact, the detection table 14 slides on the workbench 13, and cooperates with the spring 18 to cause the detection table 14 to vibrate. A transmission rod 47 that penetrates the reciprocating rod 20 is fixed to the top of the straight plate 44. The transmission rod 47 can transmit the fan-shaped reciprocating rotation motion of the straight plate 44 to the reciprocating rod 20, allowing the reciprocating rod 20 to perform a fan-shaped reciprocating rotation motion.

[0060] The use process of the present invention:

[0061] First, the piston 17 is installed on the three-jaw chuck 11, and then the transmission gear 51 is installed on the second rotating column 112. Then, the driving motor 52 will drive the three-jaw chuck 11 to rotate, and then drive the piston 17 to rotate. At the same time, the image acquisition device 12 will take pictures of the piston 17 at different angles to collect images of it at different angles. Subsequently, the images are transmitted to the computer, and the computer will identify the images to determine whether the various parameters of the piston 17 meet the requirements. If they meet the requirements, the piston 17 is installed in the cylinder body 16, and the cylinder body 16 is fixed to the clamping device 30.

[0062] According to the rule that the farther the distance from the rotation center of the reciprocating rod 20, the larger the size of the cylinder body 16 and the piston 17, the cylinder body 16 and the piston 17 are arranged in different sizes, and the position of the clamping device 30 is changed, thereby changing the position of the cylinder body 16 and the piston 17, so that the connecting rod 15 on the piston 17 is connected to the connecting seat 22, and according to the position of the cylinder body 16 and the piston 17, the position of the connecting piece 21 is adjusted so that the connecting piece 21, the connecting seat 22, the connecting rod 15, the cylinder body 16 and the piston 17 are in a straight line. At this time, the piston 17 is located at the center of the inner cavity of the cylinder body 16.

[0063] The transmission gear 51 is removed from the second rotating column 112, and then installed on the second rotating rod 42. The power device 50 is started to drive the transmission device 40, which drives the reciprocating rod 20 to perform a fan-shaped reciprocating motion, so that the connecting rod 15 drives the piston 17 to perform a linear reciprocating motion in the cylinder body 16. At the same time, the detection platform 14 generates slight vibrations through the transmission device 40 and the return spring 18 to simulate the vibration load in the actual working environment. During this process, the cylinder body 16 can also be sealed and the medium can be injected into it. The changing working pressure in the actual working condition is simulated by the medium pressure loading mechanism, and data is collected by the pressure sensor, temperature sensor and stroke number sensor.

[0064] After the test is completed, the piston 17 is placed on the three-jaw chuck 11, and the fatigue life and quality of the piston 17 are evaluated based on the image analysis results.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reciprocating piston fatigue life test device, comprising a work table (10) and a rotary three-jaw chuck (11) on the top thereof, characterized in that: The work table (10) is equipped with an image collector (12) and a workbench (13). The top of the workbench (13) is slidably connected to a detection table (14). A reciprocating rod (20) provided on the top of the workbench (13) is fixed with a plurality of connecting members (21). Connecting rods (15) of the same size are rotatably connected on both sides of the connecting members (21). The connecting rods (15) are rotatably connected to a piston (17) arranged in a cylinder body (16). The farther away from the rotation center of the reciprocating rod (20), the larger the size of the connecting rod (15), the cylinder body (16) and the piston (17). The detection table (14) is fixed with a spring (18) fixed to the workbench (13). The detection table (14) is equipped with a clamping device (30). The clamping device (30) can change its position and clamp cylinder bodies (16) of different sizes. A transmission device (40) is provided on the top of the workbench (13) for driving the reciprocating rod (20) to rotate in a fan-shaped reciprocating manner. The transmission device (40) includes a first rotating rod (41) and a second rotating rod (42). The transmission device (40) cooperates with a spring (18) to realize the vibration of the detection table (14). A power device (50) is installed on the workbench (10). The power device (50) includes a transmission gear (51). By adjusting the position of the transmission gear (51), the three-jaw chuck (11) and the transmission device (40) can be driven respectively. The transmission device (40) comprises an arc-shaped plate (43) and a straight plate (44) connected to each other. The reciprocating rod (20) and the straight plate (44) are both rotatably connected to a rotating shaft fixed on the workbench (13). The top of the first rotating rod (41) passes through the workbench (13) and is fixed with an extension rod (45). The convex column at the top of the extension rod (45) extends into the arc-shaped hole of the arc-shaped plate (43).

2. A reciprocating piston fatigue life test device according to claim 1, characterized in that: The clamping device (30) comprises a slide rail (31) fixed on the detection platform (14), a plurality of slide plates (32) sliding on the top of the slide rail (31), a clamping seat (33) sliding on the top of the slide plates (32), and a cylinder body (16) disposed in a groove on the top of the clamping seat (33).

3. A reciprocating piston fatigue life test device according to claim 2, characterized in that: A clamping rod (34) to which the cylinder body (16) is fixed is threadedly penetrated on the clamping seat (33); a first fixing plate (35) is fixed on both sides of the slide rail (31) and the slide plate (32) by bolts; a second fixing plate (36) is fixed on both sides of the clamping seat (33) and the slide plate (32) by bolts; the first fixing plate (35) is slidably connected to the slide rail (31), and the second fixing plate (36) is slidably connected to the slide plate (32).

4. A reciprocating piston fatigue life test device according to claim 1, characterized in that: The connecting member (21) can be fixed to any position on the reciprocating rod (20) by means of bolts. Connecting seats (22) are fixed to both sides of the top of the connecting member (21) by means of bolts. The connecting seats (22) are rotatably connected to the connecting rod (15).

5. The reciprocating piston fatigue life test device according to claim 1, characterized in that: The first rotating rod (41) and the second rotating rod (42) are rotatably connected to the work table (10); the power device (50) comprises a driving motor (52); the output shaft of the driving motor (52) passes through the work table (10) and is fixed with a main gear (53); a threaded column for mounting a transmission gear (51) is provided on the top of the second rotating rod (42); the main gear (53) is meshed with the transmission gear (51); and the first rotating rod (41) and the second rotating rod (42) are driven by a belt.

6. The reciprocating piston fatigue life test device according to claim 1, characterized in that: A first rotating column (111) rotatably connected to the work table (10) is fixed at the bottom of the three-jaw chuck (11), and a second rotating column (112) is rotatably connected to the top of the work table (10). A threaded column for mounting a transmission gear (51) is provided at the top of the second rotating column (112), and the first rotating column (111) and the second rotating column (112) are driven by a belt.

7. The reciprocating piston fatigue life test device according to claim 1, characterized in that: The straight plate (44) is fixed with a striking rod (46), the top wall of the inner cavity of the detection platform (14) is fixed with a rectangular plate (141) used in conjunction with the striking rod (46), and the top of the straight plate (44) is fixed with a transmission rod (47) that passes through the reciprocating rod (20).

Images