Swing-vibration combined test bench

Abstract

A swing-vibration combined test bench, comprising a base (100), vibration excitation assemblies and a vibration table top (300). The vibration excitation assemblies are rotatably connected to the vibration table top (300) and the base (100), and apply a vibration force in the vertical direction to the vibration table top (300); righting assemblies (400) are provided between the base (100) and the vibration table top (300) and each comprise a righting support (410) and a swing arm (420), the righting supports (410) being arranged on the base (100); one end of each swing arm (420) is provided with a first decoupling rotation mechanism (430) connected to a righting support (410), and the other end of each swing arm (420) is provided with a second decoupling rotation mechanism (440) connected to the vibration table top (300); each first decoupling rotation mechanism (430) comprises a holder (431) and a first rotating shaft (432) supported on the holder (431), the axis of the first rotating shaft (432) being parallel to the horizontal plane; end parts of the swing arms (420) are rotatably connected to the first rotating shafts (432), and the swing arms (420) can perform rotational motion perpendicular to the horizontal plane around the first decoupling rotation mechanisms (430) along with the vibration table top (300); horizontal deflection compensation members are provided on the holders (431), and are used for enabling the swing arms (420) to rotate in the horizontal direction; while performing reciprocating vibration in the vertical direction, the vibration table top (300) rotates in the horizontal direction along with the swing arms (420).

Description

Swing vibration composite test bench

[0001] This application is based on the Chinese patent application with application number 202311253443.7 and application date September 26, 2023, and claims the priority of the Chinese patent application. The entire content of the above patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of vibration test benches, and in particular to a swing vibration composite test bench. Background Art

[0003] Vibration testing is a typical environmental mechanical test and is widely used for mechanical simulation and reliability verification of automotive parts, aerospace products, and other equipment. Swing testing is primarily used to simulate the environments in which equipment such as ships and seaplanes are installed. It allows for swing and tilt testing of various mechanical, electrical, and electronic products to assess their ability to withstand the specified severity levels. It can also be used to test the adaptability of major automotive components to tilt and swing environments. It can also be used to simulate swing testing of control rods in nuclear reactors to verify their reliability and stability.

[0004] Usually, a considerable number of test pieces are placed in complex environments and need to undergo composite tests of vibration and swing at the same time, so as to more realistically simulate the actual mechanical environment of the product.

[0005] The reference to any prior art in the specification is not an acknowledgement or suggestion that the prior art forms part of the common general knowledge in any jurisdiction, or that it could reasonably be expected that the person skilled in the art would understand, consider relevant and / or combine with other prior art. Summary of the Invention

[0006] The purpose of this application is to provide a rocking vibration composite test bench to solve the above problems.

[0007] To achieve one of the above-mentioned objectives, one embodiment of the present invention provides a rocking-vibration composite test bench, comprising a base, an excitation assembly, and a vibration table driven by the excitation assembly, wherein the excitation assembly includes a hydraulic cylinder, the upper end of which is rotatably connected to the vibration table, and the lower end of which is rotatably connected to the base, and the excitation assembly can apply a vertical vibration force to the vibration table;

[0008] A righting assembly is provided between the base and the vibration table, the righting assembly comprising a righting support and a swing arm, the righting support is provided on the base, one end of the swing arm is provided with a first decoupling rotation mechanism connected to the righting support, and the other end of the swing arm is provided with a second decoupling rotation mechanism connected to the vibration table;

[0009] The structure of the first decoupling rotation mechanism is consistent with that of the second decoupling rotation mechanism. The first decoupling rotation mechanism includes a bracket and a first rotating shaft mounted on the bracket. The axis of the first rotating shaft is parallel to the horizontal plane. The end of the swing arm is rotatably connected to the first rotating shaft. The swing arm can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism along with the vibration table. A horizontal deflection compensation component is also provided on the bracket. The horizontal deflection compensation component is used to enable the swing arm to rotate in the horizontal direction. The vibration table rotates in the horizontal direction along with the swing arm while performing reciprocating vibration in the vertical direction.

[0010] As a further improvement to the embodiment of the present application, bearings are respectively provided at both ends of the first rotating shaft, and the bearings are provided on a bracket.

[0011] As a further improvement of the embodiment of the present application, the horizontal deflection compensation member is an elastic ring, and the elastic ring is arranged between the outer cylindrical surface of the bearing and the bracket.

[0012] As a further improvement to the embodiment of the present application, a retaining ring is provided on a side of the bearing close to the end of the first rotating shaft.

[0013] As a further improvement of the implementation mode of the present application, the straightening support is arranged perpendicular to the base, and the straightening support includes a vertical plate and two side plates arranged perpendicular to the vertical plate. The side plates are triangular, and the axis of the first rotating shaft is arranged parallel to the plane where the vertical plate is located.

[0014] As a further improvement of the implementation mode of the present application, the vibration table includes a table main body and a connecting portion extending outward from the table main body, the connecting portion is used to connect to a second decoupling rotation mechanism, and a yield portion is formed between the connecting portion and the table main body, and the yield portion is used to allow the vibration table to avoid the straightening component during movement.

[0015] As a further improvement to the implementation mode of the present application, the two ends of the hydraulic cylinder are respectively connected to the base and the vibration table in the form of ball joints.

[0016] As a further improvement of the implementation mode of the present application, a rotating mechanism is provided at both ends of the hydraulic cylinder, and the rotating mechanism includes a first rotating support, a second rotating shaft, a second rotating support and a third rotating shaft. The first rotating support is fixed on the base / vibration table, the second rotating shaft is mounted on the first rotating support, the second rotating support is fixed on the hydraulic cylinder, and the third rotating shaft is mounted on the second rotating support. The second rotating shaft and the third rotating shaft are an integrated cross-shaped structure.

[0017] As a further improvement of the embodiment of the present application, there are at least two straightening assemblies.

[0018] As a further improvement of the implementation mode of the present application, there are four excitation components and they are evenly distributed circumferentially, and there are four straightening components and they are evenly distributed circumferentially.

[0019] Compared with the prior art, the beneficial effect of the present application is that: through the above structure, the excitation component is used to apply a vertical vibration force to the vibration table, and by arranging the straightening component to rotate in the vertical direction with the vertical vibration of the vibration table, the vibration table is driven to rotate in the horizontal direction, thereby realizing a vibration and swing composite test on the specimen, with excellent test accuracy and reliability.

[0020] As used herein, the term "comprise" and variations of the term, such as "comprises," "comprised," "comprising," "including," and "containing" do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of the overall structure of a swing vibration composite test bench according to a specific embodiment of the present application;

[0022] Figure 2 is an enlarged view of point A in Figure 1;

[0023] FIG3 is a schematic diagram of a portion of the structure of the righting assembly in the rocking vibration composite test bench;

[0024] FIG4 is a cross-sectional view of a decoupling rotation mechanism in a rocking vibration composite test bench;

[0025] FIG5 is a top view of the rocking vibration composite test bench.

[0026] Among them: 100-base, 210-hydraulic cylinder, 220-rotation mechanism, 221-first rotating support, 222-second rotating shaft, 223-second rotating support, 224-third rotating shaft, 300-vibration table, 310-table body, 320-connecting part, 330-yielding part, 400-righting assembly, 410-righting support, 411-vertical plate, 412-side plate, 420-swing arm, 430-first decoupling rotating mechanism, 431-bracket, 432-first rotating shaft, 433-bearing, 434-elastic ring, 435-retaining ring, 440-second decoupling rotating mechanism. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0028] If the present invention involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), the directions involved must be defined. For example, "To clearly express the positions and directions described in this invention, the end closest to the operator is the proximal end, and the end away from the operator is the distal end." Alternatively, the paper can be used as a reference for definition. Of course, if the subsequent description defines the positional relationship between the two by reference, this definition does not need to be included here.

[0029] A rocking vibration composite test bench, as shown in Figures 1 to 5, includes a base 100, an excitation assembly, and a vibration table 300 driven by the excitation assembly, which are arranged in order from bottom to top. The excitation assembly includes a hydraulic cylinder 210, and the two ends of the hydraulic cylinder 210 are respectively rotatably connected to the base 100 and the vibration table 300. The excitation assembly can apply a vibration force in the vertical axis direction to the vibration table 300.

[0030] A straightening assembly 400 is provided between the base 100 and the vibration table 300. The straightening assembly 400 includes a straightening support 410 and a swing arm 420. The straightening support 410 is provided on the base 100. One end of the swing arm 420 is provided with a first decoupling rotation mechanism 430 connected to the straightening support 410, and the other end of the swing arm 420 is provided with a second decoupling rotation mechanism 440 connected to the vibration table 300.

[0031] The first decoupling rotation mechanism 430 and the second decoupling rotation mechanism 440 have the same structure. The first decoupling rotation mechanism 430 includes a bracket 431 and a first rotating shaft 432 mounted on the bracket 431. The axis of the first rotating shaft 432 is parallel to the horizontal plane. The end of the swing arm 420 is rotatably connected to the first rotating shaft 432. The swing arm 420 can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism 430 along with the vibration table 300. A horizontal deflection compensator is also provided on the bracket 431. This compensator is used to allow the swing arm 420 to rotate horizontally. The vibration table 300 rotates horizontally along with the swing arm 420 while performing vertical reciprocating vibration. The first and second decoupling rotation mechanisms 430 and 440 are used to limit the horizontal swinging freedom of the vibration table 300.

[0032] As shown in FIG3 , bearings 433 are respectively provided at both ends of the first rotating shaft 432 , and the bearings 433 are provided on the bracket 431 . The first rotating shaft 432 is mounted on the bracket 431 through the bearings 433 and can rotate on the bracket 431 , thereby causing the swing arm 420 to rotate.

[0033] As shown in FIG4 , the horizontal deflection compensation component is an elastic ring 434 , which is disposed between the outer circumferential surface of the bearing 433 and the bracket 431 . When the swing arm 420 rotates perpendicularly to the horizontal plane along with the vibration table 300 , the vibration table 300 is driven by the swing arm 420 to generate a horizontal rotational movement trend. The swing arm 420 applies force to the bearing 433 , and the bearing 433 is squeezed by the elastic ring 434 . As a result, the elastic ring 434 is deformed, allowing the swing arm 420 to deflect horizontally, thereby realizing the horizontal rotation of the vibration table 300 . The elastic ring 434 allows the righting assembly 400 to have a certain degree of flexibility while limiting the freedom of movement of the vibration table 300 , thereby compensating for the expansion and contraction of the righting assembly 400 during operation of the test bench.

[0034] A retaining ring 435 is provided on one side of the bearing 433 close to the end of the first rotating shaft 432 . The retaining ring 435 is used to shield, prevent dust, protect and limit the bearing 433 .

[0035] The straightening support 410 is arranged perpendicular to the base 100. The straightening support 410 includes a vertical plate 411 and two side plates 412 arranged perpendicular to the vertical plate 411. The side plates 412 are triangular. The axis of the first rotating shaft 432 is arranged parallel to the plane where the vertical plate 411 is located. One end of the swing arm 420 is arranged on the vertical plate 411 through a first decoupling rotation mechanism 430, and the other end of the swing arm 420 is arranged below the vibration table 300 through a second decoupling rotation mechanism 440, so that the swing arm 420 rotates around the first decoupling rotation mechanism 430 arranged on the vertical plate 411.

[0036] As shown in Figure 5, the vibration table 300 includes a table body 310 and a connecting portion 320 extending outward from the table body 310. The connecting portion 320 is used to connect to the second decoupling rotation mechanism 440. A yield portion 330 is formed between the connecting portion 320 and the table body 310. The yield portion 330 is used to allow the vibration table 300 to avoid the straightening assembly 400 during movement. When the vibration table 300 moves downward with the excitation assembly, the swing arm 420 also rotates downward. Due to the presence of the yield portion 330, the swing arm 420 and the vibration table 300 can be prevented from colliding during movement.

[0037] As an embodiment of the present invention, both ends of the hydraulic cylinder 210 are respectively connected to the base 100 and the vibration table 300 in the form of ball joints, and the ball joints are used to decouple the movement of the hydraulic cylinder 210.

[0038] As another embodiment of the present invention, as shown in FIG2 , the two ends of the hydraulic cylinder 210 are connected to the base 100 and the vibration table 300 respectively by a rotation mechanism 220. The rotation mechanism 220 includes a first rotation support 221, a second rotation shaft 222, a second rotation support 223 and a third rotation shaft 224. The first rotation support 221 is fixed to the base 100 / vibration table 300, the second rotation shaft 222 is mounted on the first rotation support 221, the second rotation support 223 is fixed to the hydraulic cylinder 210, and the third rotation shaft 224 is mounted on the second rotation support 223. The second rotation shaft 222 and the third rotation shaft 224 are an integrated cross-shaped structure. The above-mentioned rotation mechanism 220 meets the large thrust requirements of some tests, and at the same time can avoid the problem of easy wear between the spherical surface and the mounting surface of conventional ball joints, thereby ensuring transmission accuracy.

[0039] As an embodiment of the present invention, the number of the excitation components corresponds to the number of the righting components 400 , and each movement of the excitation component is restricted by a righting component 400 to limit the degree of freedom and guide the swinging motion.

[0040] As an embodiment of the present invention, there are at least two straightening assemblies 400 and there are multiple excitation assemblies.

[0041] As an embodiment of the present invention, there are four excitation assemblies that are evenly distributed circumferentially, and there are four straightening assemblies 400 that are evenly distributed circumferentially. The vibration table 300 is evenly driven by the excitation assemblies and evenly pulled by the straightening assemblies 400. The second decoupling rotation mechanisms 440 of the straightening mechanism are respectively arranged below the connecting portion 320, and the swing arms 420 are arranged in the yielding portion 330, so that the movement of the swing arms 420 and the vibration table 300 is smooth and does not interfere with each other. The excitation assembly is arranged next to the second decoupling rotation mechanism 440, so that the movement of the swing arms 420 and the excitation assembly is smooth and does not interfere with each other.

[0042] The rocking and vibration composite test bench provided by the present invention uses the excitation assembly to apply a vertical vibration force to the vibration table 300. By arranging the righting assembly 400 to rotate in the vertical direction along with the vertical vibration of the vibration table 300, it drives the vibration table 300 to rotate in the horizontal direction, thereby realizing a vibration and rocking composite test on the specimen, with excellent test accuracy and reliability.

[0043] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swing vibration composite test bench, characterized in that: The invention comprises a base (100), a vibration excitation component and a vibration table (300) driven by the vibration excitation component, wherein the vibration excitation component comprises a hydraulic cylinder (210), the upper end of the hydraulic cylinder (210) is rotatably connected to the vibration table (300), the lower end of the hydraulic cylinder (210) is rotatably connected to the base (100), and the vibration excitation component can apply a vibration force in a vertical direction to the vibration table (300); A righting assembly (400) is provided between the base (100) and the vibration table (300), the righting assembly (400) comprising a righting support (410) and a swing arm (420), the righting support (410) being provided on the base (100), a first decoupling rotation mechanism (430) being provided at one end of the swing arm (420) and being connected to the righting support (410), and a second decoupling rotation mechanism (440) being provided at the other end of the swing arm (420) and being connected to the vibration table (300); The first decoupling rotation mechanism (430) and the second decoupling rotation mechanism (440) have the same structure. The first decoupling rotation mechanism (430) comprises a bracket (431) and a first rotating shaft (432) mounted on the bracket (431). The axis of the first rotating shaft (432) is parallel to a horizontal plane. The end of the swing arm (420) is rotatably connected to the first rotating shaft (432). The swing arm (420) can rotate perpendicular to the horizontal plane around the first decoupling rotation mechanism (430) along with the vibration table (300). A horizontal deflection compensation component is also provided on the bracket (431). The horizontal deflection compensation component is used to enable the swing arm (420) to rotate in a horizontal direction. The vibration table (300) rotates in a horizontal direction along with the swing arm (420) while performing reciprocating vibration in a vertical direction.

2. The swing vibration composite test bench according to claim 1 is characterized in that: Bearings (433) are respectively sleeved on both ends of the first rotating shaft (432), and the bearings (433) are arranged on the bracket (431).

3. The rocking and vibration composite test bench according to claim 2 is characterized in that: The horizontal deflection compensation component is an elastic ring (434), and the elastic ring (434) is arranged between the outer cylindrical surface of the bearing (433) and the bracket (431).

4. The swing vibration composite test bench according to claim 2 is characterized in that: A retaining ring (435) is provided on one side of the bearing (433) close to the end of the first rotating shaft (432).

5. The swing vibration composite test bench according to claim 1 is characterized in that: The uprighting support (410) is arranged perpendicular to the base (100), and comprises a vertical plate (411) and two side plates (412) arranged perpendicular to the vertical plate (411), the side plates (412) are triangular in shape, and the axis of the first rotating shaft (432) is arranged parallel to the plane where the vertical plate (411) is located.

6. The rocking and vibration composite test bench according to claim 1 is characterized in that: The vibration table (300) comprises a table body (310) and a connecting portion (320) extending outward from the table body (310); the connecting portion (320) is used to connect to a second decoupling rotation mechanism (440); a yielding portion (330) is formed between the connecting portion (320) and the table body (310); the yielding portion (330) is used to allow the vibration table (300) to avoid the straightening assembly (400) during movement.

7. The swing vibration composite test bench according to claim 1 is characterized in that: Both ends of the hydraulic cylinder (210) are respectively connected to the base (100) and the vibration table (300) in the form of ball joints.

8. The swing vibration composite test bench according to claim 1 is characterized in that: A rotating mechanism (220) is provided at both ends of the hydraulic cylinder (210), and the rotating mechanism (220) comprises a first rotating support (221), a second rotating shaft (222), a second rotating support (223) and a third rotating shaft (224); the first rotating support (221) is fixed on the base (100) / vibration table (300); the second rotating shaft (222) is mounted on the first rotating support (221); the second rotating support (223) is fixed on the hydraulic cylinder (210); the third rotating shaft (224) is mounted on the second rotating support (223); and the second rotating shaft (222) and the third rotating shaft (224) are an integrated cross-shaped structure.

9. The swing vibration composite test bench according to claim 1 is characterized in that: There are at least two righting assemblies (400).

10. The rocking and vibration composite test bench according to claim 9, characterized in that: There are four excitation components which are evenly distributed in the circumferential direction, and there are four straightening components (400) which are evenly distributed in the circumferential direction.

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