A transition device for a vibration test fixture

Abstract

The utility model belongs to environmental test technical field, concretely is a kind of transition device for vibration test fixture. One end of universal ball head is installed on base bottom plate through bolt, the anti-inclination side plate is four, is installed on base bottom plate through bolt, four anti-inclination side plates are respectively arranged in the periphery of universal ball head, one end of universal ball head other end is connected top plate through bolt, the periphery of top plate is respectively set up notch, and extension arm on anti-inclination side plate is in-depth the notch, the periphery of top plate is equipped with blind hole, and vibration-damping rubber column is installed in the blind hole, and the both ends of vibration-damping rubber column are respectively set stud, and anti-inclination side plate and top plate are connected by the both ends stud set up on vibration-damping rubber column. It can be realized in the required test piece of multiple-point excitation asynchronous vibration test can be in the guarantee vibration transmission while realizing certain angle realizes deflection swing, and guarantee swing amplitude is not too big, and functionality and security are considered.

Description

Technical Field

[0001] This utility model relates to the design of a transition device for a novel vibration testing fixture, belonging to the field of environmental testing technology. By designing a transition device, the test piece can safely deflect and swing within a certain angle during multi-point asynchronous excitation vibration testing. Specifically, it is a transition device for a vibration testing fixture. Background Technology

[0002] Vibration testing is an important part of environmental testing. It can be used to discover defects in product design and manufacturing processes, thereby improving product design and enhancing the product's resistance to vibration environments.

[0003] Due to the limitations of vibration testing requirements, commonly used vibration fixtures and vibration tables are rigidly mounted. When the test piece vibrates, the product is rigidly connected to the vibration table via the fixture, allowing only fixed-axis vibration. As vibration testing requirements become increasingly stringent, some slender test pieces require multi-point asynchronous excitation vibration. However, the commonly used method of directly connecting the vibration table to the vibration fixture can only achieve synchronous vibration or asynchronous vibration through the small-angle deflection and oscillation of the vibration table's moving coil. This results in a limited adjustment range, poor safety, and a high risk of damage to the test piece. To enable the test piece to achieve a certain angle of deflection and oscillation on the vibration table, a transition device is designed. A universal ball joint is installed between the vibration table and the test fixture. The universal ball joint is rigidly connected to the vibration table via a base plate, and its top plate is rigidly connected to the bottom surface of the vibration fixture. The oscillation of the universal ball joint allows the test piece to deflect and oscillate at a certain angle. Four anti-tilt side plates are installed around the two ends of the universal ball joint of the transition device. The anti-tilt side plates are rigidly fixed to the base plate and flexibly connected to the top plate through vibration damping rubber columns. Through the grooves on the sides of the top plate and the extension arm structure on the top of the anti-tilt side plates, the test piece can swing at a certain angle while ensuring that the swing amplitude of the test piece is not too large, thus achieving the purpose of safe testing. Utility Model Content

[0004] Utility Model Purpose Design a transition device to enable the test piece to deflect and swing at a certain angle when vibrating on a vibration table, while ensuring that the swing amplitude of the test piece is not too large, so as to achieve the purpose of multi-point asynchronous excitation vibration safety test.

[0005] Technical solution A transition device for a vibration testing fixture includes a base plate, a top plate, anti-tilt side plates, a universal ball joint, and vibration-damping rubber columns. One end of the universal ball joint is bolted to the base plate. Four anti-tilt side plates are bolted to the base plate and are respectively arranged around the universal ball joint. One end of the universal ball joint is bolted to the top plate. The top plate has slots around its perimeter, and extension arms on the anti-tilt side plates extend into these slots. Blind holes are provided around the top plate, and vibration-damping rubber columns are installed within these blind holes. Studs are provided at both ends of each vibration-damping rubber column, connecting the anti-tilt side plates and the top plate.

[0006] Furthermore, the thickness of the extension arm is smaller than the height of the groove to ensure that the two do not contact each other, and the maximum deflection swing amplitude is determined by designing the difference between the two.

[0007] Furthermore, the base plate is made of aluminum, which ensures rigidity while reducing weight.

[0008] Furthermore, the anti-tilt side plate is provided with anti-tilt side plate reinforcing ribs.

[0009] Furthermore, the anti-roll side plate is specifically an inverted T-shaped structure.

[0010] Furthermore, there are several blind holes, evenly distributed around the top plate.

[0011] Technical effect The design of this transition device enables the test piece to achieve a certain angle of deflection and oscillation during multi-point excitation asynchronous vibration tests, while ensuring vibration transmission and preventing excessive oscillation amplitude, thus balancing functionality and safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the transition device; Figure 2 This is a front view of the transition device; Figure 3 This is a schematic diagram of a universal ball joint; The components include: base plate 1, top plate 2, anti-tilt side plate 3, universal ball joint 4, vibration damping rubber column 5, extension arm 6, side groove of top plate 7, mounting through hole of vibration damping rubber column 8, and reinforcing rib of anti-tilt side plate 9. Detailed Implementation

[0013] The transition device consists of five parts: a base plate, a top plate, anti-tilt side plates, a universal ball joint, and vibration-damping rubber columns.

[0014] The base plate is made of aluminum and its bottom surface is rigidly connected to the vibration table. Blind holes are drilled on the base plate according to the mounting holes of the universal ball joint and the anti-tilt side plate, and steel threaded bushings are installed. The universal ball joint and the anti-tilt side plate are rigidly connected to the base plate by bolts.

[0015] The top plate is made of aluminum, with grooves cut into the center of all four sides. A vibration clamp is rigidly connected to the upper surface of the top plate. Blind holes are drilled on the lower surface of the top plate according to the mounting holes for the universal ball joint, and steel threaded bushings are installed, rigidly connected to the other end of the universal ball joint via bolts. A ring of vibration-damping rubber posts is installed around the lower edge of the top plate side.

[0016] The anti-roll side plates are made of aluminum, with an inverted T-shaped structure, consisting of four pieces in total (front, back, left, and right). The bottom of the anti-roll side plates is bolted to the base plate. An extension arm is welded to the upper end, which inserts into a groove in the top plate. The thickness of the extension arm is less than the height of the groove to ensure that they do not contact each other; the maximum deflection swing amplitude is determined by the difference between the two. Through holes are drilled in the upright plate of the anti-roll side plates, and vibration-damping rubber columns installed on the lower side of the top plate are connected and fixed to the anti-roll side plates with nuts through the through holes.

[0017] The omnidirectional ball joint is made of steel, and the two hemispheres can move freely within a certain angle. The two end faces are fixed to the upper end face of the base plate and the lower end face of the top plate respectively through fixing holes.

[0018] The vibration damping rubber column is a rubber component with mounting studs at both ends. One end is installed on the lower side of the top plate, and the other end passes through the vertical surface of the anti-tilt side plate and is fixed with a nut.

[0019] Example The transition device for vibration testing fixture includes a base plate 1, a top plate 2, anti-tilt side plates 3, a universal ball joint 4, and vibration damping rubber columns 5. One end of the universal ball joint 4 is bolted to the base plate 1. There are four anti-tilt side plates 3, which are bolted to the base plate 1. The four anti-tilt side plates 3 are respectively arranged around the universal ball joint 4. One end of the universal ball joint 4 is bolted to the top plate 2. The top plate 2 has slots on all four sides. The extension arms 6 on the anti-tilt side plates 3 extend into the slots. The top plate 2 has blind holes on all four sides. Vibration damping rubber columns 5 are installed in the blind holes. Studs are set at both ends of the vibration damping rubber columns 5. The anti-tilt side plates 3 and the top plate 2 are connected by the studs at both ends of the vibration damping rubber columns 5.

[0020] Furthermore, the thickness of the extension arm 6 is smaller than the height of the groove to ensure that the two do not contact each other, and the maximum deflection swing amplitude is determined by designing the difference between the two.

[0021] Furthermore, the base plate 1 is made of aluminum, which ensures the required rigidity while reducing weight.

[0022] Furthermore, the anti-tilt side plate 3 is provided with anti-tilt side plate reinforcing ribs 9.

[0023] Furthermore, the anti-roll side plate 3 is specifically an inverted T-shaped structure.

[0024] Furthermore, there are several blind holes, evenly distributed around the top plate 2.

[0025] 1) A hexagonal base plate 1 with dimensions suitable for the mounting surface of the moving coil of the vibration table is machined and installed on the vibration table surface by bolts; 2) Process a top plate 2 of appropriate size, and cut grooves 7 on the sides of the top plate 2 in the middle of the four sides.

[0026] 3) Drill threaded holes in the lower half of the top plate 2 and install an appropriate number of vibration damping rubber columns 5.

[0027] 4) Select two universal ball joints 4 of appropriate size. The two ends of the universal ball joints 4 are rigidly installed on the upper end face of the base plate 1 and the lower end face of the top plate 2 by bolts.

[0028] 5) Process an anti-tilt side plate 3 of appropriate size, and weld an extension arm 6 of appropriate size to the top of the anti-tilt side plate 3. The size of the extension arm 6 is smaller than the height of the groove 7 on the side of the top plate to ensure that the two do not contact each other. The maximum deflection swing amplitude is determined by designing the difference between the two.

[0029] 6) Weld appropriate-sized anti-tilt side plate reinforcing ribs 9 around the anti-tilt side plate 3.

[0030] 7) The anti-tilting side plate 3 is rigidly installed on the hexagonal base plate 1 by bolts.

[0031] 8) On the anti-tilt side plate 3, make through holes 8 for installing vibration damping rubber columns. The position of the holes is determined according to the position of the vibration damping rubber columns 5.

[0032] 9) One end of the vibration damping rubber column 5 passes through the vibration damping rubber column mounting through hole 8 and is fixed to the upright plate with a nut.

[0033] Install the vibration test fixture on the top of the top plate 2 to complete the installation of the entire transition device.

Claims

1. A transition device for a vibration testing fixture, characterized in that, The system includes a base plate, a top plate, anti-tilt side plates, a universal ball joint, and vibration-damping rubber columns. One end of the universal ball joint is bolted to the base plate. There are four anti-tilt side plates, which are bolted to the base plate. The four anti-tilt side plates are respectively arranged around the universal ball joint. One end of the universal ball joint is bolted to the top plate. The top plate has slots around its perimeter. The extension arms on the anti-tilt side plates extend into the slots. Blind holes are provided around the top plate. Vibration-damping rubber columns are installed in the blind holes. Studs are provided at both ends of the vibration-damping rubber columns. The anti-tilt side plates and the top plate are connected by the studs on the vibration-damping rubber columns.

2. The apparatus as claimed in claim 1, characterized in that, The thickness of the extension arm is smaller than the height of the groove to ensure that the two do not contact each other. The maximum deflection swing amplitude is determined by designing the difference between the two.

3. The apparatus as described in claim 1, characterized in that, The base plate is made of aluminum.

4. The apparatus as claimed in claim 1, characterized in that, The anti-tilt side plate is provided with anti-tilt side plate reinforcing ribs.

5. The apparatus as claimed in claim 1, characterized in that, The anti-tilt side plate is specifically an inverted T-shaped structure.

6. The apparatus as claimed in claim 1, characterized in that, There are several blind holes, evenly distributed around the top plate.

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