Railway passenger seat strength and fatigue testing system

Abstract

The present application relates to a railway passenger seat strength and fatigue testing system, comprising a frame and a linear telescopic device. The linear telescopic device comprises a linear telescopic device body fixed to the frame and a telescopic rod that can be driven to move linearly relative to the linear telescopic device body. The testing system also comprises an end effector assembly connected to the telescopic rod and a rotary drive device that can drive the end effector assembly to rotate relative to the telescopic rod. The rotation axis of the end effector assembly is parallel to the telescopic direction of the telescopic rod. The end effector assembly is driven by the rotary drive device to rotate a predetermined angle as it follows the telescopic rod's extension and retraction. The end effector assembly is driven by the telescopic rod to contact the railway passenger seat under test. The system can dynamically adjust the point of application of force to the tested area, thereby enabling more realistic dynamic testing of the seat's fatigue strength and ensuring test reliability.

Description

Technical Field

[0001] The present application relates to the technical field of railway equipment testing devices, and in particular to a railway passenger seat strength and fatigue testing system. Background Art

[0002] Railway passenger seats deform and wear out during repeated use. To ensure passenger safety, strength and fatigue testing of passenger seats is essential. Existing testing methods and devices often rely on manually adding weights and observing deformation. This results in low test efficiency, fails to fully simulate passenger usage scenarios, and suffers from poor speed measurement accuracy, ultimately impacting passenger safety and experience.

[0003] The content of this background technology description is only for facilitating understanding of the relevant technology in this field and is not regarded as an admission of the prior art. Summary of the Invention

[0004] Therefore, embodiments of the present invention intend to provide a railway passenger seat strength and fatigue testing system that is more accurate and more in line with actual usage conditions, dynamically adjusts the measurement points of the tested area of ​​the railway passenger seat, and is more in line with actual usage conditions during the fatigue test. Specifically, embodiments of the present invention provide a railway passenger seat strength and fatigue testing system, comprising a frame, a linear telescopic device, wherein the linear telescopic device comprises a linear telescopic device body fixed to the frame and a telescopic rod that can be driven to move linearly relative to the linear telescopic device body. The testing system also comprises an end effector assembly connected to the telescopic rod and a rotary drive assembly that can drive the end effector assembly to rotate relative to the telescopic rod, wherein the rotation axis of the end effector assembly is parallel to the telescopic direction of the telescopic rod, and the end effector assembly is driven by the rotary drive assembly to rotate a predetermined angle in following the telescopic rod's extension and retraction process, and the end effector assembly is driven by the telescopic rod to contact the railway passenger seat under test.

[0005] In some embodiments of the present invention, a mounting end plate is provided at the end of the telescopic rod, and the end execution assembly includes a first gear mounted on the mounting end plate and rotatable relative to the mounting end plate, and a contact kit connected to the first gear; the output end of the rotation drive device is provided with a second gear rotatable relative to the mounting end plate, and the first gear is engaged with the second gear.

[0006] In some embodiments of the present invention, the rotation drive device includes a drive motor or a rotary cylinder connected to the mounting end plate, and an output end of the drive motor or the rotary cylinder is connected to the second gear.

[0007] The transmission gear of the present invention is connected with the transmission gear of the present invention respectively and the transmission gear of the present invention is connected with the transmission gear of the present invention respectively and the transmission gear of the present invention is connected with the transmission gear of the present invention respectively and the transmission gear of the present invention is connected with the transmission gear of the present invention respectively and the transmission gear of the present invention is connected with the transmission gear of the present invention respectively.

[0008] The ratchet device is configured to not drive the first bevel gear to rotate when the telescopic rod moves in a direction away from the linear telescopic device body, and to drive the first bevel gear to rotate when the telescopic rod moves in a direction close to the linear telescopic device body.

[0009] In some embodiments of the present invention, the contact kit includes a contact connecting rod connected to the first gear, a universal joint connected to the contact connecting rod, and a contact hammer connected to the universal joint coupling.

[0010] In some embodiments of the present invention, the linear telescopic device includes one or more of a driving cylinder, an electric cylinder, and a hydraulic cylinder.

[0011] In some embodiments of the present invention, a force sensor is provided at the end of the telescopic rod, and the end effector assembly is connected to the force sensor.

[0012] In some embodiments of the present invention, the testing system further comprises a displacement measuring device for measuring the displacement change of the measured area of ​​the railway passenger seat, and the measuring direction of the displacement measuring device is consistent with the extension and retraction direction of the telescopic rod.

[0013] In some embodiments of the present invention, the displacement measuring device includes a laser ranging sensor fixed to the frame, and a measuring point of the laser ranging sensor is located on the measured area.

[0014] In some embodiments of the present invention, the testing system further includes a control device, which is used to control the linear telescopic device to drive the telescopic rod to move in a direction away from the linear telescopic device body without driving the end actuator to rotate, and when the telescopic rod moves in a direction close to the linear telescopic device body, drive the end actuator to rotate a predetermined angle, and record the force and displacement borne by the measured area of ​​the railway passenger seat during the control process.

[0015] The testing system in this embodiment of the present invention dynamically adjusts the point of force application during the continuous application of a test force to the tested area of ​​a railway passenger seat, thereby enabling more realistic dynamic testing of the seat's fatigue strength, ensuring test reliability and increasing the accuracy of the testing process. Specifically, during the dynamic extension and retraction of the end effector assembly, the rotary drive device rotates the end effector assembly through a predetermined angle until it contacts the tested railway passenger seat.

[0016] Other optional features and technical effects of the embodiments of the present invention are partially described below, and partially can be understood by reading this document. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The elements shown are not limited to the scale shown in the drawings. The same or similar reference numerals in the drawings represent the same or similar elements, wherein:

[0018] Figure 1 An exemplary overall structural diagram of a railway passenger seat strength and fatigue testing system according to some embodiments of the present invention is shown;

[0019] Figure 2 An exemplary overall structural diagram of a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention is shown;

[0020] Figure 3 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0021] Figure 4 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0022] Figure 5 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0023] Figure 6 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0024] Figure 7 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0025] Figure 8 An exemplary partial structural diagram of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0026] Figure 9 An exemplary structural diagram of a second bevel gear in a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention is shown;

[0027] Figure 10a An exemplary structural diagram showing a ratchet device in a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown;

[0028] Figure 10b Another exemplary structural diagram showing a ratchet device in a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention;

[0029] Figure 11a An exemplary structural diagram showing an initial state of a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention;

[0030] Figure 11b An exemplary structural diagram showing an extended contact state of a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention;

[0031] Figure 11c An exemplary structural diagram of a railway passenger seat strength and fatigue testing system during retraction according to some other embodiments of the present invention is shown;

[0032] Figure 11d An exemplary structural diagram showing a retracted state of a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention;

[0033] Figure 11e An exemplary structural diagram showing a re-extended contact state of a railway passenger seat strength and fatigue testing system according to other embodiments of the present invention;

[0034] Figure 12 An exemplary connection diagram showing the connection relationship of a control device of a railway passenger seat strength and fatigue testing system according to some other embodiments of the present invention is shown. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0036] The inventors found that most of the current seat strength testing devices manually apply loads and then observe or measure deformation and displacement, and often use single-point testing. However, in the actual use environment of the seat, due to the user's sitting posture, the main bearing point of the seat on the user often changes, especially in the use environment of railway passenger seats. During the travel of railway trains, since the riding time is relatively long, users will inevitably change their sitting posture when using the seat, causing the seat bearing point to change. In order to test the seat more accurately, it is necessary to simulate the seat use environment more in line with actual usage conditions.

[0037] An embodiment of the present invention provides a railway passenger seat strength and fatigue testing system capable of testing the strength and fatigue of railway passenger seats. To better simulate the seat's operating environment, the end effector assembly in contact with the seat rotates according to a predetermined angle during its retraction and expansion process. This allows the contact point between the end effector assembly and the seat to change according to a predetermined design, thereby more accurately and realistically simulating the seat's operating environment. In particular, during fatigue testing, by varying the contact point, the seat's deformation and displacement over long periods of use can be measured, improving test reliability and ensuring the safety and comfort of the seat.

[0038] like Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a railway passenger seat strength and fatigue testing system 100, including a frame 110 and a linear telescopic device 120. The linear telescopic device 120 includes a linear telescopic device body 121 fixed to the frame 110 and a telescopic rod 122 that can be driven to move linearly relative to the linear telescopic device body 121. The testing system 100 also includes an end effector assembly 130 connected to the telescopic rod 122 and a rotation drive device 140 that can drive the end effector assembly 130 to rotate relative to the telescopic rod 122. The rotation axis of the end effector assembly 130 is parallel to the extension and retraction direction of the telescopic rod 122. The end effector assembly 130 is driven by the rotation drive device 140 to rotate by a predetermined angle as it follows the extension and retraction of the telescopic rod 122. The end effector assembly 130 is driven by the telescopic rod 122 to contact the railway passenger seat 200 under test.

[0039] In an embodiment of the present invention, the linear telescopic device body 121 can be fixed to the frame by a quick installation device, which is convenient for installation and fixation, or it can be fixed by screws. In some embodiments, when the linear telescopic device body 121 is not fixed to the frame, it can slide and rotate relative to the frame. After determining the rear position and posture, it can be fixed by a quick installation device. In some embodiments of the present invention, the frame 110 is provided with a slide groove, the nut of the fixing screw is set in the slide groove, the screw of the fixing screw is passed through the mounting hole of the linear telescopic device body 121, and a fixing nut is provided at the end of the screw of the fixing screw. By tightening the fixed nut, the linear telescopic device body 121 can be fixed. When the fixed nut is not tightened, the position of the linear telescopic device body 121 can be adjusted along the direction of the slide groove.

[0040] In the embodiment of the present invention, during the dynamic contact between the end effector assembly 130 and the railway passenger seat 200 under test, the rotary drive device 140 drives the end effector assembly 130 to rotate a certain angle relative to the telescopic rod 122, ensuring that the contact point of the test system 100 with the seat 200 is a dynamic contact point, thereby truly simulating the usage state of the seat 200.

[0041] In an embodiment of the present invention, during multiple consecutive tests or fatigue testing, the rotation drive device 140 can drive the end effector assembly 130 to rotate when the telescopic rod 122 is extended. When in contact with the seat 200, the end effector assembly 130 remains relatively stationary. When the telescopic rod 122 retracts, the rotation drive device 140 stops driving the end effector assembly 130 to rotate. When the telescopic rod 122 is extended again, the rotation drive device 140 drives the end effector assembly 130 to rotate by a predetermined angle; this cycle is repeated. In an embodiment of the present invention, the rotation drive device 140 can drive the end effector assembly 130 to rotate in only one direction, thereby ensuring a uniform distribution of contact points.

[0042] In an embodiment of the present invention, during a strength test or a fatigue test, the rotary drive device 140 can drive the end effector assembly 130 to rotate when the telescopic rod 122 retracts. When the telescopic rod 122 extends, the rotary drive device 140 stops driving the end effector assembly 130 to rotate. When in contact with the seat 200, the end effector assembly 130 remains relatively fixed. When the telescopic rod 122 retracts again, the rotary drive device 140 drives the end effector assembly 130 to rotate by a predetermined angle; this cycle is executed. This embodiment of the present invention ensures that the end effector assembly 130 remains relatively fixed during contact with the seat, thereby avoiding the risk of damage to the rotary drive device 140 due to the large resistance of the seat. In this embodiment of the present invention, the rotary drive device 140 can only drive the end effector assembly 130 to rotate in one direction, thereby ensuring that the contact points are evenly distributed.

[0043] like Figure 1 As shown, the telescopic rod 122 is provided with a mounting end plate 123 at its end. The end effector assembly 130 includes a first gear 131 mounted on and rotatable relative to the mounting end plate 123, and a contact assembly 132 connected to the first gear 131. The output end of the rotation drive device 140 is provided with a second gear 1401 rotatable relative to the mounting end plate 123, with the first gear 131 meshing with the second gear 1401. The rotation drive device 140 drives the second gear 1401 to rotate relative to the mounting end plate 123. The second gear 1401 drives the first gear 131 to rotate, thereby driving the contact assembly 132 to rotate. The contact assembly 132 is in contact with the seat being tested.

[0044] In some embodiments of the present invention, the rotation drive device 140 can move together with the telescopic rod 122. The rotation drive device 140 includes a drive motor or a rotary cylinder connected to the mounting end plate 123, and the output end of the drive motor or rotary cylinder is connected to the second gear 1401. The drive motor or rotary cylinder is fixedly connected to the mounting end plate 123, and the output end of the drive motor or rotary cylinder drives the second gear 1401 to rotate.

[0045] In some embodiments of the present invention, the rotation drive device 140 can be provided with a separate drive assembly at the end of the telescopic rod 122 to drive the end effector assembly 130 to rotate. In addition, the drive device can be saved, the weight of the end can be reduced, and the angle can be reduced by using the power of the telescopic rod 122 to drive the end effector assembly 130 to rotate. Specifically, Figures 2 to 12As shown, in some other embodiments of the embodiments of the present invention, the rotation drive device 140 includes a side mounting frame 1403 fixedly connected to the linear telescopic device body 121, a third gear 1404 mounted on the side mounting frame 1403 and rotatable relative to the side mounting frame 1403, a ratchet device 1405 arranged inside the third gear 1404 and rotatable relative to the side mounting frame 1403, a first bevel gear 1406 connected to the output shaft of the ratchet device 1405, a second bevel gear 1407 meshing with the first bevel gear 1406, a rack 1408 that can slide relative to the side mounting frame 1403 and meshing with the third gear 1404, and a distal end of the rack 1408 is fixed to the mounting end plate 123. The second bevel gear 1407 is mounted on the side mounting frame 1403 and can rotate relative to the side mounting frame 1403. A square sliding hole 14071 is provided at the center of the second bevel gear 1407, and the rotation axis of the second bevel gear 1407 is parallel to the sliding direction of the rack 1408; the rotation drive device 140 also includes a square connecting rod 1409 that can slide relative to the square sliding hole 14071 and is driven to rotate by the second bevel gear 1407, the end center of the square connecting rod 1409 is fixed to the center of the second gear 1401, the sliding direction of the rack 1408 is parallel to the extension direction of the telescopic rod 122, and the sliding direction of the square connecting rod 1409 is parallel to the extension direction of the telescopic rod 122.

[0046] The ratchet device 1405 is configured to not drive the first bevel gear 1406 to rotate when the telescopic rod 122 moves in a direction away from the linear telescopic device body 121, and to drive the first bevel gear 1406 to rotate when the telescopic rod 122 moves in a direction close to the linear telescopic device body 121.

[0047] In the embodiment of the present invention, when the telescopic rod 122 is extended, that is, when it moves in a direction away from the linear telescopic device body 121, the telescopic rod 122 drives the mounting end plate 123 to move, thereby driving the rack 1408 to move in a direction away from the telescopic device body 121. At this time, the ratchet device 1405 does not drive the first bevel gear 1406 to rotate, the second bevel gear 1407 does not rotate, the square connecting rod 1409 slides relative to the square sliding hole 14071, the square connecting rod 1409 does not rotate, and thus the second gear 1401 does not rotate, and the end actuator 130 does not rotate. Rotation; When the telescopic rod 122 retracts, that is, moves toward the linear telescopic device body 121, the telescopic rod 122 drives the mounting end plate 123 to move, thereby driving the rack 1408 to move toward the telescopic device body 121. At this time, the ratchet device 1405 drives the first bevel gear 1406 to rotate, the second bevel gear 1407 to rotate, the square connecting rod 1409 slides relative to the square sliding hole 14071, and the square connecting rod 1409 also rotates, thereby driving the second gear 1401 to rotate, and the end effector assembly 130 rotates a predetermined angle. Figure 9 As shown, the cross-sectional shape of the square sliding hole 14071 is adapted to the cross-sectional shape of the square connecting rod 1409 , for example, both are in the positive direction.

[0048] In some embodiments of the present invention, Figure 10a As shown, the ratchet device 1405 in the embodiment of the present invention includes a ratchet 14051 and a pawl 14052, the ratchet 14051 is connected to the first bevel gear 1406, and the pawl 14052 is hinged to the third gear 1404. Generally, the ratchet device 1405 also includes a spring, which is used to make the pawl 14052 close to the surface of the ratchet 14051. When the rack 1408 moves downward, the end of the pawl 14052 slides along the surface of the ratchet 14051, the ratchet 14051 does not rotate, and the first bevel gear 1406 does not rotate; when the rack 1408 moves upward, the end of the pawl 14052 is inserted into the groove of the ratchet 14051, and the pawl 14052 drives the ratchet 14051 to rotate, thereby rotating the first bevel gear 1406.

[0049] In other embodiments of the present invention, Figure 10b As shown, the ratchet device 1405 is configured to drive the first bevel gear 1406 to rotate when the telescopic rod 122 moves in a direction away from the linear telescopic device body 121, and not drive the first bevel gear 1406 to rotate when the telescopic rod 122 moves in a direction close to the linear telescopic device body 121.

[0050] In the embodiment of the present invention, when the telescopic rod 122 is extended, that is, when it moves in a direction away from the linear telescopic device body 121, the telescopic rod 122 drives the mounting end plate 123 to move, thereby driving the rack 1408 to move in a direction away from the telescopic device body 121. At this time, the ratchet device 1405 drives the first bevel gear 1406 to rotate, the second bevel gear 1407 to rotate, the square connecting rod 1409 slides relative to the square sliding hole 14071, the square connecting rod 1409 rotates, thereby the second gear 1401 rotates, and the end effector 130 rotates. Predetermined angle; when the telescopic rod 122 retracts, that is, moves in the direction close to the linear telescopic device body 121, the telescopic rod 122 drives the mounting end plate 123 to move, thereby driving the rack 1408 to move in the direction close to the telescopic device body 121. At this time, the ratchet device 1405 does not drive the first bevel gear 1406 to rotate, the second bevel gear 1407 does not rotate, the square connecting rod 1409 slides relative to the square sliding hole 14071, the square connecting rod 1409 does not rotate, the second gear 1401 does not rotate, and the end execution assembly 130 does not rotate.

[0051] In other embodiments of the present invention, Figure 10b As shown, the ratchet device 1405 in the embodiment of the present invention includes a ratchet 14051 and a pawl 14052, the ratchet 14051 is connected to the first bevel gear 1406, and the pawl 14052 is hinged to the third gear 1404. Generally, the ratchet device 1405 also includes a spring, which is used to make the pawl 14052 close to the surface of the ratchet 14051. When the rack 1408 moves upward, the end of the pawl 14052 slides along the surface of the ratchet 14051, the ratchet 14051 does not rotate, and the first bevel gear 1406 does not rotate; when the rack 1408 moves downward, the end of the pawl 14052 is inserted into the groove of the ratchet 14051, and the pawl 14052 drives the ratchet 14051 to rotate, thereby rotating the first bevel gear 1406.

[0052] In an embodiment of the present invention, during the telescopic rod's extension and retraction process, the rotation angle of the end effector 130 is determined based on the transmission ratio between the gears and the extension length. In some embodiments, after determining the transmission ratio, the angle can also be set by adjusting the length of the area on the rack where the teeth are located. The area outside this length is devoid of teeth, and the rack does not contact the third gear, thereby not driving the end effector 130 to rotate. In some embodiments of the present invention, when the telescopic rod is extended, the upper end of the rack may be devoid of teeth when driving the end effector to rotate. This allows the rotation drive to cease driving the end effector to rotate when the end effector contacts the seat, reducing the risk of damage to the seat and other components.

[0053] In some embodiments of the present invention, to ensure that the force applied to the seat 200 is perpendicular to the seat surface when the contact assembly 132 contacts the seat 200, a coupling is provided to adaptively adjust the posture of the contact assembly 132. Specifically, the contact assembly 132 includes a contact connecting rod 1321 connected to the first gear 131, a universal coupling 1322 connected to the contact connecting rod 1321, and a contact hammer 1323 connected to the universal coupling 1322. When the contact hammer 1323 contacts the seat 200, the universal coupling 1322 adaptively rotates as the surface of the seat 200 changes. This ensures that the contact hammer 1322 adaptively adjusts its posture when in contact with the seat, ensuring uniform force on the contact hammer 1322 and more realistically simulating the soft contact state of the seat during use.

[0054] In some embodiments of the present invention, the linear telescopic device 120 includes one or more of a driving cylinder, an electric cylinder, and a hydraulic cylinder to adapt to different driving environments.

[0055] In some embodiments of the present invention, a force sensor 1221 is provided at the end of the telescopic rod 122, and the end effector assembly 130 is connected to the force sensor 1221. The force applied to the seat 200 is measured by the force sensor 1221. In embodiments of the present invention, the weight of the end effector assembly 130 can be calibrated before measurement and then used.

[0056] In some embodiments of the present invention, the testing system 100 further includes a displacement measuring device 150 for measuring the displacement of a measured area of ​​the railway passenger seat 200 . The measuring direction of the displacement measuring device 150 is consistent with the telescopic direction of the telescopic rod 122 .

[0057] In some embodiments of the present invention, the displacement measuring device 150 includes a laser ranging sensor fixed to the frame, with the measuring point of the laser ranging sensor located above the measured area. The laser ranging sensor provides rapid and dynamic feedback on displacement changes in the measured area, enabling intuitive acquisition of changes in the measured area during testing.

[0058] In some embodiments of the present invention, Figure 1 、 Figure 12As shown, the testing system 100 further includes a control device 160. The control device 160 is configured to control the linear telescopic device 120 to not rotate the end effector assembly 130 when the telescopic rod 122 moves away from the linear telescopic device body 121. When the telescopic rod 122 moves toward the linear telescopic device body 121, the control device 160 drives the end effector assembly 130 to rotate by a predetermined angle. During this control process, the control device 160 records the force and displacement experienced by the tested area of ​​the railway passenger seat 200. In this embodiment of the present invention, the control device 160 controls the telescopic movement of the linear telescopic device 120 while also directly controlling the rotational drive device 140. When the telescopic rod 122 moves away from the linear telescopic device body 121, the control device 160 controls the rotational drive device 140 to not rotate the end effector assembly 130. When the telescopic rod 122 moves toward the linear telescopic device body 121, the control device 140 controls the rotational drive device 140 to rotate the end effector assembly 130 by a predetermined angle. In some embodiments of the present invention, the control device 160 can also control the operation of the rotational drive device 140 through the mechanical structure and the linear telescopic device 120. For example, as described in the above embodiment, the rotational drive device 140 utilizes the power of the telescopic rod 122. In some embodiments of the present invention, the control device 160 is also connected to the displacement measurement sensor 150 and the force sensor 1221 to receive and record corresponding displacement change and force measurement data. In some embodiments of the present invention, the control device 160 also generates corresponding displacement change curves and force change curves based on the received displacement change and force measurement data, facilitating intuitive analysis of the status of the tested seat.

[0059] In some embodiments of the present invention, the control device 160 can also be used to control the linear telescopic device 120 to drive the telescopic rod 122 to move in a direction away from the linear telescopic device body 121, thereby driving the end effector assembly 130 to rotate; when the telescopic rod 122 moves in a direction close to the linear telescopic device body 121, the end effector assembly 130 is not driven to rotate a predetermined angle, and the force and displacement borne by the measured area of ​​the railway passenger seat 200 are recorded during the control process.

[0060] In some embodiments of the present invention, multiple sets of components can be set up to test multiple seats simultaneously. In this case, corresponding linear telescopic devices 120, end execution components 130 and rotary drive devices 140 are set for each seat, and a displacement measuring device 150 can be further set.

[0061] The relative rotation between components and parts in the embodiments of the present invention can be achieved through conventional devices or structures in the art, such as bearings. In some embodiments of relative rotation, a shaft can be provided on a first part, a bearing can be placed on the outside of the shaft, a second part that rotates relative to the first part can be placed on the outside of the bearing, and a retaining spring or axial locking nut can be provided on the shaft. In some embodiments of relative rotation, a bearing hole can be provided on the first part, a bearing can be placed in the bearing hole, a second part that rotates relative to the first part can be placed on the inside of the bearing, and a locking screw can be provided on the opposite side to secure the second part in the axial direction.

[0062] In the embodiment of the present invention, in order to facilitate the rapid and effective sliding of the square connecting rod 1409, a sliding ball or sliding grease may be further provided inside the square sliding hole 14071.

[0063] In some embodiments of the present invention, Figures 11a to 11b As shown, when the telescopic rod 122 is extended, the contact kit 132 does not rotate. Figures 11c to 11d When the telescopic rod is retracted, the contact kit 132 rotates to a predetermined angle, which may be 60 degrees, 90 degrees, etc. Figure 11e When the telescopic rod 122 is extended again, the contact kit 132 does not rotate. Of course, in some embodiments of the present invention, the opposite setting can also be made as needed, that is, when the telescopic rod 122 is extended, the contact kit rotates, and when it is retracted, it does not rotate.

[0064] The testing system in this embodiment of the present invention dynamically adjusts the point of force application during the continuous application of a test force to the tested area of ​​a railway passenger seat, thereby enabling more realistic dynamic testing of the seat's fatigue strength, ensuring test reliability and increasing the accuracy of the testing process. Specifically, during the dynamic extension and retraction of the end effector assembly, the rotary drive device rotates the end effector assembly through a predetermined angle until it contacts the tested railway passenger seat.

[0065] In this document, multiple embodiments of the present invention are described, but for the sake of brevity, the description of each embodiment is not exhaustive, and the same or similar features or parts between the embodiments may be omitted. In this document, "one embodiment", "some embodiments", "example", "specific example", or "some examples" are intended to apply to at least one embodiment or example according to the present invention, but not all embodiments. The above terms do not necessarily mean to refer to the same embodiment or example. Those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually contradictory.

[0066] While the exemplary systems and apparatus of the present invention have been specifically shown and described with reference to the foregoing embodiments, these are merely examples of the best modes for implementing the present systems and methods. Those skilled in the art will appreciate that various modifications may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or apparatus without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A railway passenger seat strength and fatigue testing system, characterized in that: The test system comprises a frame and a linear telescopic device, wherein the linear telescopic device comprises a linear telescopic device body fixed to the frame and a telescopic rod that can be driven to move linearly relative to the linear telescopic device body. The test system further comprises an end-effector assembly connected to the telescopic rod and a rotary drive device that can drive the end-effector assembly to rotate relative to the telescopic rod, wherein the rotation axis of the end-effector assembly is parallel to the telescopic direction of the telescopic rod, and the end-effector assembly is driven by the rotary drive device to rotate a predetermined angle in the process of following the telescopic rod's extension and retraction, and the end-effector assembly is driven by the telescopic rod to contact the railway passenger seat under test; wherein, The end of the telescopic rod is provided with a mounting end plate, the end effector assembly includes a first gear mounted on the mounting end plate and rotatable relative to the mounting end plate, and a contact sleeve connected to the first gear; the output end of the rotary drive device is provided with a second gear rotatable relative to the mounting end plate, and the first gear is meshed with the second gear; The transmission gear of the present invention is a gear which is engaged with the gear of the control gear and the gear of the control gear. The gear of the control gear is engaged with the gear of the control gear and the gear of the control gear is connected with the gear of the control gear to the said gear box. The ratchet device is configured to not drive the first bevel gear to rotate when the telescopic rod moves in a direction away from the linear telescopic device body, and to drive the first bevel gear to rotate when the telescopic rod moves in a direction close to the linear telescopic device body; The contact kit includes a contact connecting rod connected to the first gear, a universal joint connected to the contact connecting rod, and a contact hammer connected to the universal joint.

2. The test system according to claim 1, wherein: The rotary drive device includes a drive motor or a rotary cylinder connected to the mounting end plate, and an output end of the drive motor or the rotary cylinder is connected to the second gear.

3. The test system according to claim 1, wherein: The linear telescopic device includes one or more of a driving cylinder, an electric cylinder, and a hydraulic cylinder.

4. The test system according to claim 1, wherein: A force sensor is provided at the end of the telescopic rod, and the end actuator is connected to the force sensor.

5. The test system according to claim 1, wherein: The testing system further comprises a displacement measuring device for measuring the displacement change of the measured area of ​​the railway passenger seat, wherein the measuring direction of the displacement measuring device is consistent with the telescopic direction of the telescopic rod.

6. The test system according to claim 5, characterized in that: The displacement measuring device includes a laser distance measuring sensor fixed to the frame, and a measuring point of the laser distance measuring sensor is located on the measured area.

7. The test system according to any one of claims 1 to 6, characterized in that: The testing system also includes a control device, which is used to control the linear telescopic device to drive the telescopic rod to move in a direction away from the linear telescopic device body without driving the end effector assembly to rotate, and when the telescopic rod moves in a direction close to the linear telescopic device body, drive the end effector assembly to rotate a predetermined angle, and record the force and displacement of the tested area of ​​the railway passenger seat during the control process.

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