CN214952061U

CN214952061U - Vibration test stand

Info

Publication number: CN214952061U
Application number: CN202121011772.7U
Authority: CN
Inventors: 周佳; 杨省溪; 张胜云
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-11-30
Anticipated expiration: 2031-05-12

Abstract

The utility model provides a vibration test bench, include: a work table; a vibration exciter; the vibration exciter comprises a first telescopic component and a second telescopic component which are arranged along different directions. The utility model discloses a vibration test bench adopts the first flexible part and the flexible part of second that set up along the equidirectional, and the first end of the first flexible part and the first end of the flexible part of second articulate each other and form articulated supporting structure, and articulated supporting structure connects the lower surface of workstation, the second end of the first flexible part and the second end of the flexible part of second articulate the setting respectively, and during the action of first flexible part and second flexible part, the workstation is along moving, and simultaneously, first flexible part and the flexible part of second set up along the equidirectional, just so can be through the cooperation of the flexible part of first flexible part and second, can produce the exciting force of a plurality of directions to the workstation, for prior art, the utility model discloses simple structure does not have any overconstraint, convenient assembling.

Description

Vibration test stand

Technical Field

The utility model relates to a vibration test technical field particularly, relates to a vibration test platform.

Background

When mechanical equipment such as an automobile runs on a road surface, various road conditions are usually met, for example, the road surface is uneven, obstacles exist on the road surface, and the like, which all cause the mechanical equipment to vibrate, and the vibration has a great influence on the service life of the structure in the mechanical equipment. In order to evaluate the bearing capacity of each part of the mechanical equipment to the road condition, so as to improve the performance of the equipment, a vibration test bed is generally adopted to simulate the running condition of the mechanical equipment on the road surface.

In the process of product research and development, widely used vibration test beds are various in type, and can be divided into two categories, namely a simulation earthquake test bed with an integral working table and a vibration test bed for simulating multipoint excitation of a load according to different structural arrangements and purposes. The common vibration driving modes include electromagnetism, machinery and electricity liquid, and when the degree of freedom is high, the structural arrangement is difficult, and the control of vibration parameters is complex. The structure adopting the guide rail mode of the machine tool has the advantages of complex structure, large volume and weight, suitability for only a test bed with less freedom degree and lower frequency and no wide application. And a structure adopting 6 obliquely arranged oil cylinders is called as a Stewart Platform (Stewart Platform), and although 6 degrees of freedom can be realized, the mechanical structure is complex, the operation difficulty of motion parameters is high, the program is huge, and the cost of a main engine is high.

Therefore, it is a realistic meaning for a person skilled in the art how to provide a vibration testing stand to improve one of the technical problems existing in the prior art or the related art.

SUMMERY OF THE UTILITY MODEL

According to an embodiment of the present invention, it is intended to improve at least one of technical problems existing in the prior art or the related art.

Therefore, according to the utility model discloses an embodiment, aim at provides a vibration test bench.

In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided a vibration test stand including:

a work table;

a vibration exciter;

the vibration exciter comprises a first telescopic part and a second telescopic part which are arranged along different directions, wherein the first end of the first telescopic part and the first end of the second telescopic part are hinged to each other to form a hinged support structure, the hinged support structure is connected with the lower surface of the workbench, and the second end of the first telescopic part and the second end of the second telescopic part are hinged to each other.

According to the utility model discloses an embodiment of first aspect, the utility model discloses a vibration test bench adopts the first flexible part and the flexible part of second that set up along the equidirectional not to constitute the vibration exciter, and the first end of the first flexible part and the first end of the flexible part of second articulate each other and form the hinge support structure, and the hinge support structural connection the lower surface of workstation, the second end of first flexible part and the second end of the flexible part of second articulate the setting respectively, and when first flexible part and the flexible part action of second, the workstation is followed up, and simultaneously, first flexible part and the flexible part of second set up along the equidirectional not, just so can produce the excitation force of a plurality of directions to the workstation through the cooperation of first flexible part and the flexible part of second. Therefore, the utility model discloses a vibration test platform, for prior art, simple structure does not have any restraint, convenient assembling.

As the utility model discloses a vibration test platform is the improvement on the one hand, the vibration exciter includes the frame, the second end of first flexible part with the frame is articulated, the second end of the flexible part of second with the frame is articulated.

As an improvement of the vibration test stand of the present invention in one aspect, one of the first extensible member and the second extensible member is disposed along a horizontal direction, and the other is disposed along a height direction.

As an improvement of the vibration test bed of the present invention, in one aspect, the first telescopic member is a servo cylinder; and/or the second telescopic part is a servo oil cylinder.

As the utility model discloses an improvement of vibration test platform on the one hand, articulated bearing structure is including support, inner cup, enclosing cover and the lower cover that from top to bottom sets gradually, the support connect in the lower surface of workstation, the support with the lower cover encloses to close and forms outer sphere chamber, the first end of second extensible part stretches into outer sphere chamber forms the sphere and articulates vice, the first end of second extensible part is embedded inner cup and enclosing cover, inner cup and enclosing cover enclose to close and form interior sphere chamber, the first end of first extensible part stretches into interior sphere chamber forms the sphere and articulates vice.

As the utility model discloses a vibration test platform is the improvement on the one hand, the quantity of vibration exciter is 3, and the articulated bearing structure of 3 vibration exciters is equilateral triangle arrange connect in the lower surface of workstation.

As the utility model discloses an improvement of vibration test platform on the one hand, the first flexible part of 2 vibration exciters in 3 vibration exciters sets up along first horizontal direction, and the first flexible part of 1 vibration exciter sets up along the second horizontal direction, and the flexible part of second of 3 vibration exciters all sets up along direction of height, first horizontal direction perpendicular to the second horizontal direction, the direction of height perpendicular to first horizontal direction, the direction of height perpendicular to the second horizontal direction.

As the utility model discloses a vibration test platform still includes the third flexible part that sets up along the direction of height in the improvement of an aspect, the third flexible part is used for balanced gravity, the one end of the flexible part of third articulate in the lower surface of workstation, the articulated setting of the other end of the flexible part of third.

As the utility model discloses an improvement of vibration test platform on the one hand, the quantity of vibration exciter is 3, and the articulated bearing structure of 3 vibration exciters is equilateral triangle and arranges the support in the lower surface of workstation, the quantity of third extensible member is 3, and 3 third extensible members are equilateral triangle and arrange, the articulated bearing structure of vibration exciter with the third extensible member sets up in turn, and the phase difference between the articulated bearing structure of adjacent vibration exciter and the third extensible member is 60.

As the utility model discloses a vibration test platform is in the improvement of an aspect, including a plurality of fixed stay posts, the fixed stay post is used for support when workstation (10) is in unoperated state the workstation, when the workstation is in unoperated state or unoperated state promptly, the workstation passes through the fixed stay post supports.

Additional aspects and advantages of the embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural diagram of a vibration testing stand according to an embodiment of the present invention when the stand is provided with a worktable.

Fig. 2 shows a schematic structural diagram of a vibration testing stand without a worktable according to an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a vibration exciter according to an embodiment of the present invention.

Fig. 4 shows a schematic structural diagram of an exciter according to an embodiment of the present invention at another viewing angle.

Fig. 5 shows a schematic structural view of an articulated support structure according to an embodiment of the invention.

The correspondence between reference numerals and components in fig. 1 to 5 is as follows:

10-a workbench; 20-a vibration exciter; 21-a first telescopic member; 22-a second telescopic member; 23-a stand; 31-a support; 32-an inner cover; 33-outer cover; 34-a lower cover; 30-a third telescopic member; and 40-fixing the support column.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of 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 some embodiments of the present invention, as shown in fig. 1 to 5, the present solution provides a vibration test stand, comprising:

a work table 10;

a vibration exciter 20;

the vibration exciter 20 comprises a first telescopic component 21 and a second telescopic component 22 which are arranged along different directions, wherein the first end of the first telescopic component 21 and the first end of the second telescopic component 22 are hinged to each other to form a hinged supporting structure, the hinged supporting structure is connected with the lower surface of the workbench 10, and the second end of the first telescopic component 21 and the second end of the second telescopic component 22 are respectively hinged to each other.

The control principle is as follows: first end of first flexible part 21 and the first end of the flexible part 22 of second articulate each other and form articulated bearing structure, articulated bearing structure connects the lower surface of workstation 10, the second end of first flexible part 21 and the second end of the flexible part 22 of second articulate respectively and set up, and during the flexible part 22 action of first flexible part 21 and second, workstation 10 follow-up, simultaneously, first flexible part 21 and the flexible part 22 of second set up along different directions, just so can produce the exciting force of a plurality of directions to workstation 10 through the cooperation of first flexible part 21 and the flexible part 22 of second.

According to the above, the vibration test bench of the present invention adopts the first telescopic member 21 and the second telescopic member 22 disposed along different directions to constitute the vibration exciter 20, the first end of the first telescopic member 21 and the first end of the second telescopic member 22 are hinged to each other to form the hinge support structure, the hinge support structure is connected to the lower surface of the working table 10, the second end of the first telescopic member 21 and the second end of the second telescopic member 22 are hinged to each other, when the first telescopic member 21 and the second telescopic member 22 act, the working table 10 follows up, and simultaneously, the first telescopic member 21 and the second telescopic member 22 are disposed along different directions, so that the vibration exciter can generate exciting forces in multiple directions on the working table 10 through the cooperation of the first telescopic member 21 and the second telescopic member 22. Therefore, the utility model discloses a vibration test platform, for prior art, simple structure does not have any restraint, convenient assembling.

Specifically, optionally, as shown in fig. 3 to 4, the vibration exciter 20 includes a base 23, the second end of the first telescopic member 21 is hinged to the base 23, the second end of the second telescopic member 22 is hinged to the base 23, and the addition of the base 23 facilitates the arrangement of the second ends of the first telescopic member 21 and the second telescopic member 22, and also facilitates the assembly, movement, and transportation of the vibration exciter 20.

In some possible embodiments of the present invention, as shown in fig. 1 to 5, one of the first telescopic member 21 and the second telescopic member 22 is disposed along a horizontal direction, and the other is disposed along a height direction. The control procedure of the vibration test stand is relatively simple when the first telescopic member 21 and said second telescopic member 22 are arranged directly in a rectangular coordinate system.

Preferably, the first telescopic member 21 is a servo cylinder; and/or the second telescopic part 22 is a servo oil cylinder. The servo oil cylinder has large driving force, accurate displacement and convenient control.

As a specific implementation form of the hinge support structure, as shown in fig. 5, the hinge support structure includes a support 31, an inner cover 32, an outer cover 33, and a lower cover 34, which are sequentially arranged from top to bottom, the support 31 is connected to the lower surface of the workbench 10, the support 31 and the lower cover 34 enclose to form an outer spherical cavity, a first end of the second telescopic component 22 extends into the outer spherical cavity to form a spherical hinge pair, a first end of the second telescopic component 22 is embedded into the inner cover 32 and the outer cover 33, the inner cover 32 and the outer cover 33 enclose to form an inner spherical cavity, and a first end of the first telescopic component 21 extends into the inner spherical cavity to form a spherical hinge pair. In this particular embodiment, the support 31 is fixed under the table 10, and is combined with the lower cover 34 to form a large inner spherical surface, the first end of the second telescopic member 22 is assembled inside to form an outer spherical hinge, and the inner cover 32 and the outer cover 33 are assembled in the hole of the first end of the second telescopic member 22 to form a small inner spherical surface, which forms an inner spherical hinge with the first end of the first telescopic member 21.

Preferably, as shown in fig. 1 to 5, the number of the exciters 20 is 3, and the hinged support structures of the 3 exciters 20 are connected to the lower surface of the table 10 in an equilateral triangle arrangement. The first telescopic members 21 of 2 of the 3 vibration exciters 20 are arranged along a first horizontal direction, the first telescopic members 21 of 1 vibration exciter 20 are arranged along a second horizontal direction, and the second telescopic members 22 of the 3 vibration exciters 20 are all arranged along a height direction, wherein the first horizontal direction is perpendicular to the second horizontal direction, the height direction is perpendicular to the first horizontal direction, and the height direction is perpendicular to the second horizontal direction. The 3 vibration exciters 20 are arranged longitudinally and transversely, so that the switchboard is reasonable in structure and simple to control.

In order to balance the gravity, as shown in fig. 1 to 5, the adverse effect of the weight of the workbench 10 and the tested piece is effectively eliminated, the testing device further comprises a third telescopic member 30 arranged along the height direction, the third telescopic member 30 is used for balancing the gravity, one end of the third telescopic member 30 is hinged to the lower surface of the workbench 10, and the other end of the third telescopic member 30 is hinged. The third telescopic member 30 is preferably a servo cylinder. The servo oil cylinder has large driving force, accurate displacement and convenient control.

In some possible embodiments of the present invention, as shown in fig. 1 to 5, the number of the vibration exciters 20 is 3, the hinge support structures of 3 vibration exciters 20 are arranged in an equilateral triangle and supported on the lower surface of the working platform 10, the number of the third telescopic members 30 is 3, 3 third telescopic members 30 are arranged in an equilateral triangle, the hinge support structures of the vibration exciters 20 and the third telescopic members 30 are alternately arranged, and the phase difference between the hinge support structures of the adjacent vibration exciters 20 and the third telescopic members 30 is 60 °.

In some possible embodiments of the present invention, as shown in fig. 1 to 5, a plurality of fixed supporting columns 40 are included, the fixed supporting columns 40 are used for supporting the working table 10, and the fixed supporting columns 40 are used for supporting the working table 10 during parking and during mounting and dismounting of a tested piece, and are kept in a horizontal state.

In some possible embodiments of the present invention, as shown in fig. 1 to 5, the vibration testing platform comprises 3 vibration exciters 20, wherein the first telescopic member 21 of 2 vibration exciters 20 of the 3 vibration exciters 20 is disposed along a first horizontal direction, the first telescopic member 21 of 1 vibration exciter 20 is disposed along a second horizontal direction, and the second telescopic member 22 of the 3 vibration exciters 20 is disposed along a height direction, the first horizontal direction is perpendicular to the second horizontal direction, the height direction is perpendicular to the first horizontal direction, the height direction is perpendicular to the second horizontal direction, the first telescopic member 21 is a servo cylinder, and the second telescopic member 22 is a servo cylinder, that is, the vibration testing platform of the present invention is driven by the servo cylinders, and the two servo cylinders are configured as a vibration exciter 20, the heads of the two piston rods of the two servo cylinders are hinged at a point through the inner and outer spherical surfaces, the automatic vibration exciter has the advantages that the automatic vibration exciter completes independent movement in the longitudinal and transverse directions of 2, the 3 vibration exciters 20 are arranged in the longitudinal and transverse directions, 6 independent degrees of freedom are achieved, the automatic vibration exciter is directly arranged according to a rectangular coordinate system, a control program is simple, on the other hand, the vibration exciters 20 are hinged with the workbench 10 through 3 spherical surfaces, movement precision is high, no over-constraint exists, the stress condition is good, assembly is convenient, and the manufacturing and processing requirements are not high.

In the above embodiment, in order to balance the gravity, the adverse effect of the weight of the workbench 10 and the tested piece is effectively eliminated, the test device further includes a third telescopic member 30 arranged along the height direction, the third telescopic member 30 is used for balancing the gravity, one end of the third telescopic member 30 is hinged to the lower surface of the workbench 10, the other end of the third telescopic member 30 is hinged, and the adverse effect of the gravity of the workbench 10 and the tested piece on the test control parameters can be eliminated to a certain extent by additionally arranging 3 gravity balance oil cylinders.

In the above embodiment, the workbench 10 has a rectangular plate structure, and the hinge support structures of the 3 vibration exciters 20 are uniformly distributed in an equilateral triangle with the center of the workbench 10 as a center, wherein the first telescopic members 21 of the 2 vibration exciters 20 are arranged along the long side direction of the workbench 10, the first telescopic members 21 of the 1 vibration exciters 20 are arranged along the short side direction of the workbench 10, and the second telescopic members 22 of the 3 vibration exciters 20 are all arranged along the height direction. 3 second telescopic parts 22 control 3 degrees of freedom of the workbench 10, the upper Z axis moves up and down, the X axis rotates and the Y axis rotates, 2 first telescopic parts 21 arranged along the long side direction of the workbench 10 control 102 degrees of freedom, namely X axis movement and Z axis rotation, and 1 first telescopic part 21 arranged along the short side direction of the workbench 10 controls 1 degree of freedom, namely X axis movement. The 3 third telescopic parts 30 are separated from the second telescopic part 22 by 60 degrees and are used for supporting the workbench 10, balancing the majority of the weight of the workbench 10 and a tested piece, and enabling the dynamic parameters in all directions to be the same.

In the above embodiment, 4 fixed supporting columns 40 are included, and 4 fixed supporting columns 40 are arranged at 4 corners below the worktable 10, the fixed supporting columns 40 are used for supporting the worktable 10 when the worktable 10 is in a non-operating state, that is, the worktable 10 is supported by the fixed supporting columns 40 when the worktable 10 is in a non-operating state or a non-operating state, and in particular, the fixed supporting columns 40 are used for supporting the worktable 10 during parking and during mounting and dismounting of a tested piece and are kept in a horizontal state. The vibration exciter 20 comprises a base 23, the second end of the first telescopic component 21 is hinged to the base 23, the second end of the second telescopic component 22 is hinged to the base 23, specifically, the second end of the first telescopic component 21 and the second end of the second telescopic component 22 can be hinged to the base 23 through a joint bearing and a pin shaft, and the first end of the first telescopic component 21 and the first end of the second telescopic component 22 form a spherical hinge pair. The ends of the first telescopic member 21 and the second telescopic member 22 are not only able to move along the drive cylinder axis, but also allow free swinging of small lateral angles.

In the above embodiment, the hinge support structure includes a support 31, an inner cover 32, an outer cover 33 and a lower cover 34, which are sequentially arranged from top to bottom, the support 31 is connected to the lower surface of the workbench 10, the support 31 and the lower cover 34 enclose to form an outer spherical cavity, the first end of the second telescopic component 22 extends into the outer spherical cavity to form a spherical hinge pair, the first end of the second telescopic component 22 is embedded into the inner cover 32 and the outer cover 33, the inner cover 32 and the outer cover 33 enclose to form an inner spherical cavity, and the first end of the first telescopic component 21 extends into the inner spherical cavity to form a spherical hinge pair. In this particular embodiment, the support 31 is fixed under the table 10, and is combined with the lower cover 34 to form a large inner spherical surface, the first end of the second telescopic member 22 is assembled inside to form an outer spherical hinge, and the inner cover 32 and the outer cover 33 are assembled in the hole of the first end of the second telescopic member 22 to form a small inner spherical surface, which forms an inner spherical hinge with the first end of the first telescopic member 21. The embodiment provides a six-degree-of-freedom vibration device driven by 6 servo oil cylinders, the geometric and motion parameters of a vibration test bed are accurate, no over-constraint exists in the structure, and the assembly is convenient.

To sum up, the utility model discloses a vibration test bench adopts first flexible part 21 and the flexible part 22 of second that sets up along the equidirectional each other articulated and form articulated bearing structure, articulated bearing structure connection of first flexible part 21's first end and the flexible part 22's of second first end and the lower surface of workstation 10, the second end of first flexible part 21 and the second end of the flexible part 22 of second articulate the setting respectively, and when first flexible part 21 and the flexible part 22 action of second, workstation 10 follow-up, simultaneously, first flexible part 21 and the flexible part 22 of second set up along the equidirectional, just so can produce the exciting force of a plurality of directions to workstation 10 through the cooperation of first flexible part 21 and the flexible part 22 of second. Therefore, the utility model discloses a vibration test platform, for prior art, simple structure does not have any restraint, convenient assembling.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A vibration test stand, comprising:

a table (10);

a vibration exciter (20);

the vibration exciter (20) comprises a first telescopic component (21) and a second telescopic component (22) which are arranged along different directions, the first end of the first telescopic component (21) and the first end of the second telescopic component (22) are hinged to each other to form a hinged supporting structure, the hinged supporting structure is connected with the lower surface of the workbench (10), and the second end of the first telescopic component (21) and the second end of the second telescopic component (22) are hinged to each other.

2. Vibration testing stand according to claim 1,

the vibration exciter (20) comprises a base (23), the second end of the first telescopic component (21) is hinged to the base (23), and the second end of the second telescopic component (22) is hinged to the base (23).

3. Vibration test bench according to claim 1, characterized in that one of the first (21) and second (22) telescopic members is arranged in horizontal direction and the other one in height direction.

4. Vibration test bench according to claim 1, characterized in that the first telescopic part (21) is a servo cylinder; and/or the second telescopic part (22) is a servo oil cylinder.

5. Vibration testing stand according to claim 1,

articulated bearing structure is including support (31), inner cup (32), enclosing cover (33) and lower cover (34) that from top to bottom set gradually, support (31) connect in the lower surface of workstation (10), support (31) with enclosing of lower cover (34) forms outer sphere chamber, the first end of second extensible part (22) stretches into outer sphere chamber forms the sphere and articulates vice, the first end of second extensible part (22) is embedded inner cup (32) and enclosing cover (33), inner cup (32) and enclosing cover (33) enclose and close and form interior sphere chamber, the first end of first extensible part (21) stretches into interior sphere chamber forms the sphere and articulates vice.

6. Vibration testing stand according to any of claims 1 to 5, characterized in that the number of said exciters (20) is 3, the articulated support structure of the 3 exciters (20) being connected to the lower surface of said table (10) in an equilateral triangular arrangement.

7. Vibration test bench according to claim 6, characterized in that the first telescopic members (21) of 2 of the 3 exciters (20) are arranged in a first horizontal direction, the first telescopic members (21) of 1 exciter (20) are arranged in a second horizontal direction, and the second telescopic members (22) of 3 exciters (20) are each arranged in a height direction, said first horizontal direction being perpendicular to said second horizontal direction, said height direction being perpendicular to said first horizontal direction, said height direction being perpendicular to said second horizontal direction.

8. The vibration test bench according to any one of claims 1 to 5, further comprising a third telescopic member (30) arranged along the height direction, wherein the third telescopic member (30) is used for balancing gravity, one end of the third telescopic member (30) is hinged to the lower surface of the workbench (10), and the other end of the third telescopic member (30) is hinged.

9. Vibration test bench according to claim 8, characterized in that the number of exciters (20) is 3, the articulated support structure of 3 exciters (20) is supported on the lower surface of the bench (10) in an equilateral triangular arrangement, the number of third telescopic members (30) is 3, the number of 3 third telescopic members (30) is in an equilateral triangular arrangement, the articulated support structure of the exciters (20) and the third telescopic members (30) are arranged alternately, and the phase difference between the articulated support structure of an adjacent exciter (20) and the third telescopic member (30) is 60 °.

10. Vibration testing stand according to any of claims 1 to 5, characterized in that it comprises a plurality of fixed supporting columns (40), said fixed supporting columns (40) being intended to support the work table (10) when the work table (10) is in a non-operative state.