CN215865715U

CN215865715U - A righting device and vibration system for shaking table

Info

Publication number: CN215865715U
Application number: CN202121854446.2U
Authority: CN
Inventors: 丁炎; 叶腾波; 曹振威; 石健; 祁祺
Original assignee: Suzhou Dongling Vibration Test Instrument Co Ltd
Current assignee: Suzhou Dongling Vibration Test Instrument Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-02-18
Anticipated expiration: 2031-08-09

Abstract

The utility model provides a centering device and a vibration system for a vibration table, which relate to the technical field of vibration tables, and the centering device for the vibration table comprises a plurality of centering components and a plurality of auxiliary components; two ends of any one of the centralizing assemblies are respectively connected with the driving table surfaces of the test table and the vibration table; the righting assemblies are uniformly arranged at intervals around a spherical hinge supporting structure between the test bed and the vibration table; two ends of any auxiliary assembly are respectively connected with the driving table top of the test bed and the driving table top of the vibration table; the auxiliary assemblies are arranged around the spherical hinge supporting structure at uniform intervals. According to the utility model, the centering component and the auxiliary component jointly act on the test bed, so that the test bed can vibrate in a safety range under a certain load, and the risk that a test object is unbalanced and toppled and even a vibration bed body of the vibration bed is damaged due to overlarge vibration inclination angle of the test bed is avoided.

Description

A righting device and vibration system for shaking table

Technical Field

The utility model relates to the technical field of vibration tables, in particular to a centering device and a vibration system for a vibration table.

Background

At present, the development of electric vibration tables at home and abroad is more and more mature, and the types of the electric vibration tables are more and more abundant. The application environment and the test objects of the vibration table are more diversified, and particularly, in the field of aerospace industry, along with the progress of aerospace technology, the test objects such as spacecrafts are heavier and heavier, and the size of the test objects is larger and larger, so that the detection test needs to be performed through the combined vibration of a plurality of vibration tables, and the accuracy of vibration transmission needs to be ensured.

In the process of a combined vibration test of a plurality of vibration tables, certain difference exists in vibration amplitude among the vibration tables, so that the test tables supported together generate a certain inclination angle, and especially when the vibration tables run asynchronously, the inclination angle of the test tables is larger, and even the test object is unbalanced and toppled. Meanwhile, when the weight of a test object placed on the test bed is large, the test object cannot be reset along with the overlarge inclination angle of the test bed, the test object tends to slide to one side along the table board of the test bed, the weight is deviated to the vibration table on one side, and the permanent mechanical damage to the table body of the vibration table is easily caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defects that the vibration table in the prior art is easy to unbalance and topple and damage the table body of the vibration table when carrying a heavy test object for testing, so as to provide a centering device and a vibration system for the vibration table.

The utility model provides a righting device for a vibrating table, which comprises:

a plurality of centralizer assemblies; two ends of any one of the centralizing assemblies are respectively connected with the driving table surfaces of the test table and the vibration table; the righting assemblies are uniformly arranged at intervals around a spherical hinge supporting structure between the test bed and the vibration table;

a plurality of auxiliary components; two ends of any auxiliary assembly are respectively connected with the driving table top of the test bed and the driving table top of the vibration table; the auxiliary assemblies are arranged around the spherical hinge supporting structure at uniform intervals.

Preferably, the structural strength of the auxiliary component is greater than the structural strength of the righting component.

Preferably, the auxiliary assembly and the centering assembly are arranged on the same circumference.

Preferably, the auxiliary component is a damper; and two ends of the damper are respectively hinged with the test bed and the driving table surface of the vibration table.

Preferably, the two hinge shafts at both ends of the damper are disposed perpendicular to each other.

Preferably, the axis of one of the two hinge shafts intersects with and is perpendicular to the axis of the spherical hinge support structure, and the axis of the other of the two hinge shafts is out of plane with and is perpendicular to the axis of the spherical hinge support structure.

Preferably, any of the centralizing assemblies comprises:

the two mounting seats are respectively fixed on the driving table tops of the test bed and the vibration table;

the two ends of the supporting swing rod are movably arranged in the mounting seat in a penetrating way respectively; a moving space is reserved in the mounting seat along the axial direction of the support swing rod;

and the buffer parts are respectively sleeved at two ends of the support swing rod and are closely matched with the corresponding mounting seats.

Preferably, a step hole is formed in the mounting seat, and the buffer piece is sleeved at two ends of the support swing rod and fixed in the step hole of the mounting seat.

Preferably, the buffer member is a rubber gasket.

The present invention provides a vibration system comprising:

at least two vibration tables adapted to act together on the same test bed;

at least two of the above-mentioned righting devices for a vibration table.

The technical scheme of the utility model has the following advantages:

1. according to the centering device for the vibration table, the plurality of centering components are arranged at equal intervals in a circle around the spherical hinge supporting structure between the test table and the vibration table, so that the vibration phase difference among the vibration tables can be compensated in the combined vibration test process of the plurality of vibration tables, and the centering of the test table is realized;

in addition, a plurality of auxiliary assemblies are arranged at equal intervals around the circle of the spherical hinge supporting structure, the auxiliary assemblies are used for strengthening and reinforcing the test bed during the combined vibration test of a plurality of vibration tables, particularly when each vibration table operates asynchronously, when the test bed inclines to a large angle and has the tendency that a test object is unbalanced and topples over, the auxiliary assemblies are combined to strengthen the restoring force for the test bed, the strengthening effect on the test bed is enhanced, the test bed vibrates in a safety range, and the risk that the test object is unbalanced and topples over or even damages the table body of the vibration table is avoided.

2. According to the centering device for the vibrating table, the auxiliary assembly can achieve good effects of buffering and protecting the vibrating table by adopting the dampers in the vibrating process of the vibrating table, the plurality of dampers surround the spherical hinge support structure for a circle, and two ends of each damper are hinged with the test table and the driving table surface of the vibrating table respectively, so that the test table can be centered by the centering assembly and buffered by the dampers no matter which direction the test table inclines, particularly, when the plurality of vibrating tables asynchronously vibrate, the inclination angle of the test table is too large, and after the dampers are added for buffering, the centering assembly can be protected, and the centering assembly is prevented from being damaged due to failure.

3. According to the centering device for the vibrating table, the centering component is provided with the mounting seat, the supporting swing rod and the buffer piece, when the test table inclines beyond the swing range of the test table, the supporting swing rod pushes the test table back to the swing range of the test table due to the buffer effect of the buffer piece, and the spherical hinge supporting structure is protected from being pulled; in addition, the two ends of the supporting swing rod are sleeved with the buffer parts, and the space for the supporting swing rod to move along the axial direction of the supporting swing rod is reserved in the mounting seat, so that the buffer effect of the supporting swing rod is improved, and particularly, when a plurality of vibration tables vibrate in a combined manner, the inclination angle range which can be righted by the righting assembly is enlarged.

4. According to the vibration system provided by the utility model, the centralizing devices for the vibration tables are correspondingly arranged between the test table supported by the plurality of vibration tables and the driving table top of each vibration table, so that the plurality of vibration tables can be suitable for larger loads when synchronously or asynchronously vibrating in a combined manner, the test table can be ensured to be centered without toppling when the load is larger and the inclination angle is larger, and the table bodies of the vibration tables are protected from being damaged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a centralizer for a vibratory table in an embodiment of the present invention;

FIG. 2 is a top view of a centralizer for a vibratory table in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a centering assembly in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a vibration system in an embodiment of the present invention.

Description of reference numerals:

1. a spherical hinge support structure; 2. a righting assembly; 21. a mounting seat; 211. a stepped bore; 22. supporting a swing rod; 23. a buffer member; 3. an auxiliary component; 4. a first connecting plate; 5. a second connecting plate; 6. a test bed; 7. a vibration table.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a righting device for a vibrating table comprising a plurality of righting assemblies 2 and a plurality of auxiliary assemblies 3. As shown in fig. 1, two ends of any one of the centering assemblies 2 are respectively connected with the driving table surfaces of the test bed 6 and the vibration table 7, and the centering assemblies 2 are uniformly arranged around the spherical hinge support structure 1 between the test bed 6 and the vibration table 7 at intervals; the two ends of any auxiliary component 3 are respectively connected with the driving table surfaces of the test table 6 and the vibration table 7, and the auxiliary components 3 are uniformly arranged around the spherical hinge supporting structure 1 at intervals. As shown in fig. 2, in the present embodiment, eight centering assemblies 2 are provided, eight auxiliary assemblies 3 are correspondingly provided, and the centering assemblies 2 and the auxiliary assemblies 3 are arranged on the same circumference around the spherical hinge support structure 1 at intervals. Of course, four, six, etc. may be provided for the centering assembly 2, and four, six, etc. may be provided for the corresponding auxiliary assembly 3, as required.

As further shown in fig. 2, in the present embodiment, eight centering assemblies 2 are uniformly spaced around the spherical hinge support structure 1. The spherical hinge support structure 1 is a hydraulic spherical hinge and is used for decoupling and transferring force to the vibration table 7.

The lower surface of the test bed 6 is fixedly connected with a first connecting plate 4 through bolts, and the driving table surface of the vibration table 7 is fixedly connected with a second connecting plate 5 through bolts. The two ends of the righting component 2 are respectively connected with the driving table-board of the test bed and the vibration table 7 through a first connecting plate 4 and a second connecting plate 5.

The righting assembly 2 comprises two mounting seats 21, a support rocker 22 and a buffer 23. Specifically, referring to fig. 3, two mounting seats 21 are fixedly mounted on the first connecting plate 4 and the second connecting plate 5 by bolts, respectively. A stepped hole 211 is formed in the mounting seat 21. The large diameter hole of the stepped hole 211 is used for installing a rubber gasket and supporting the swing rod 22, and the small diameter hole of the stepped hole 211 is used for the supporting swing rod 22 to move in the axial direction. In this embodiment, the buffer member 23 is a rubber washer. Two ends of the supporting swing rod 22 are fixed in the stepped holes 211 of the mounting seats 21 on the corresponding sides, and the rubber gaskets are sleeved at the ends of the supporting swing rod 22 and filled between the supporting swing rod 22 and the inner walls of the corresponding stepped holes 211, so that the supporting swing rod 22 and the mounting seats 21 are in close fit.

As a deformation mode, the buffer 23 may also be a spring, two ends of the support swing rod 22 are sleeved with the spring and then inserted into the step hole 211 of the mounting seat 21, and the spring abuts against the step surface of the step hole 211; a limit ring which is abutted against the spring is sleeved on one side of the two ends of the supporting swing rod 22 far away from the spring. In order to improve the cushioning effect and reduce the rigid contact, the limiting ring may be made of rubber, and the limiting ring is tightly fitted with the support swing link 22.

As shown in fig. 1, two ends of any auxiliary assembly 3 are respectively connected with the driving table tops of a test bed 6 and a vibration table 7 through a first connecting plate 4 and a second connecting plate 5; eight auxiliary assemblies 3 are evenly spaced around the ball joint support structure 1.

Eight auxiliary assembly 3 and eight crisscross interval settings of righting subassembly 2 are on same circumference, can improve the effect of the two mutual synergism, and the reinforcing is right the effect.

In this embodiment, the auxiliary component 3 is a damper; the two ends of the damper are respectively hinged with the first connecting plate 4 and the second connecting plate 5. Two articulated shafts mutually perpendicular setting at attenuator both ends. In this embodiment, the axis of the hinge shaft of the damper hinged to the first connecting plate 4 is coplanar with and perpendicular to the axis of the spherical hinge support structure 1, and the axis of the hinge shaft of the damper hinged to the second connecting plate 5 is intersected with and perpendicular to the axis of the spherical hinge support structure 1. Of course, the position relationship of the hinge shafts at the two ends of the damper can be interchanged.

The auxiliary component 3 may also be a rubber column or other elastic element that may act as a buffer.

In order to enhance the righting effect and improve the load of the test bed 6, the structural strength of the auxiliary assembly 3 is greater than that of the righting assembly 2. For example, a damper with a diameter larger than that of the support pendulum 22 is selected, or a damper made of a material with greater structural strength is selected.

Example 2

This embodiment provides a vibration system, including at least two shaking tables, be suitable for acting on same test bench jointly, at least two for shaking table righting device in embodiment 1.

As shown in fig. 4, in this embodiment, four vibrating tables are provided, and four centering devices are provided corresponding to the vibrating tables. The four vibration tables are distributed in a square shape to jointly support the same test bed 6.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A righting device for a vibratory table, comprising:

a plurality of righting assemblies (2); two ends of any one of the centralizing assemblies (2) are respectively connected with a driving table top of the test table (6) and a driving table top of the vibration table (7); the righting assemblies (2) are uniformly arranged at intervals around the spherical hinge supporting structure (1) between the test bed (6) and the vibration table (7);

a plurality of auxiliary components (3); two ends of any auxiliary assembly (3) are respectively connected with a driving table board of the test table (6) and a driving table board of the vibration table (7); the auxiliary assemblies (3) are arranged around the spherical hinge supporting structure (1) at even intervals.

2. A righting device for a vibrating table according to claim 1, characterized in that the structural strength of the auxiliary assembly (3) is greater than the structural strength of the righting assembly (2).

3. A righting device for a vibrating table according to claim 1, characterized in that the auxiliary component (3) is arranged on the same circumference as the righting component (2).

4. A righting device for a vibrating table according to claim 3, characterized in that the auxiliary component (3) is a damper; and the two ends of the damper are respectively hinged with the test bed (6) and the driving table surface of the vibration table (7).

5. A centralizer for a vibrating table according to claim 4 characterised in that the two hinge axes at the ends of the damper are arranged perpendicular to each other.

6. A righting device for a vibrating table as claimed in claim 5, characterized in that the axis of one of the two articulated shafts intersects and is perpendicular to the axis of the spherical hinge support structure (1), and the axis of the other of the two articulated shafts is out-of-plane and perpendicular to the axis of the spherical hinge support structure (1).

7. A righting device for a vibrating table according to any one of claims 1-6, characterized in that any one of the righting assemblies (2) comprises:

the two mounting seats (21) are respectively fixed on the driving table tops of the test bed (6) and the vibration table (7);

the two ends of the supporting swing rod (22) are movably arranged in the mounting seat (21) in a penetrating way respectively; a moving space is reserved in the mounting seat (21) along the axial direction of the support swing rod (22);

and the buffer parts (23) are respectively sleeved at two ends of the supporting swing rod (22) and are tightly matched with the corresponding mounting seats (21).

8. The righting device for the vibrating table as claimed in claim 7, wherein a stepped hole (211) is formed in the mounting seat (21), and the buffers (23) are sleeved on both ends of the support swing link (22) and fixed in the stepped hole (211) of the mounting seat (21).

9. A righting device for a vibrating table as claimed in claim 8, characterized in that said buffer (23) is a rubber washer.

10. A vibratory system, comprising:

at least two oscillating tables (7) suitable for acting jointly on the same test bed (6);

at least two righting devices for a vibrating table according to any one of claims 1-9.