Large displacement guide support mechanism and vibration test platform equipped with the mechanism

Abstract

The present invention discloses a large-displacement guiding support mechanism and a vibration test platform equipped with the mechanism, wherein the large-displacement guiding support mechanism comprises a base, an air storage cavity is formed inside the base; the large-displacement guiding support mechanism also comprises a first air spring and a second air spring whose internal spaces are sequentially connected to the air storage cavity, the first air spring and the second air spring are both telescopically arranged along a first direction, wherein the first air spring is fixedly arranged relative to the base, and the second air spring is fixedly arranged relative to an end of the first air spring away from the base; the large-displacement guiding support mechanism also comprises a guiding component for guiding the first air spring and the second air spring to telescope along the first direction; the large-displacement guiding support mechanism involved in the present invention can provide large-displacement guidance, and in specific applications in a vibration test platform, based on the specific structure of the large-displacement guiding support mechanism, can meet the testing requirements of heavy-loaded and high-center-of-gravity test pieces, and has strong versatility.

Description

Technical Field

[0001] The present invention relates to the field of vibration testing, and in particular to a large displacement guiding support mechanism and a vibration testing platform equipped with the mechanism. Background Art

[0002] At present, conventional vibration test platforms can better meet the requirements of small displacement (generally not more than 100mm) vibration simulation tests such as packaging and transportation vibration, building dam vibration, earthquake and electromechanical equipment vibration. In these small displacement simulation tests, air springs are usually used to support and guide the vibration test platform in a specific direction; however, for some test pieces with large weight, high center of gravity, and relatively large displacement (generally not less than 300mm) required during testing, such as artillery shells, heavy missiles, high-pressure gas cylinders, etc., the existing technology cannot meet the requirements well. The main reason is that there are few load-bearing devices on the market that can directly meet the long displacement guidance requirements of such test pieces, and conventional single air springs are constrained by their own long displacement and low load-bearing characteristics and cannot meet their heavy load requirements.

[0003] In view of this, it is necessary to provide an improved technical solution to solve the above problems. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To achieve the above-mentioned purpose of the invention, the present invention provides a large displacement guiding support mechanism, and its specific design method is as follows.

[0005] A large displacement guiding support mechanism comprises a base, wherein an air storage cavity is formed inside the base; the large displacement guiding support mechanism also comprises a first air spring and a second air spring whose internal spaces are sequentially connected to the air storage cavity, wherein the first air spring and the second air spring are both telescopically arranged along a first direction, wherein the first air spring is fixedly arranged relative to the base, and the second air spring is fixedly arranged relative to an end of the first air spring away from the base; the large displacement guiding support mechanism also comprises a guiding assembly for guiding the first air spring and the second air spring to telescope along the first direction.

[0006] Furthermore, the guide assembly includes a guide shaft extending in the same direction as the first direction and a linear bearing fitted to the guide shaft, the linear bearing being fixed relative to the base, and the guide shaft being fixed relative to an end of the second air spring away from the first air spring.

[0007] Furthermore, the large displacement guide support mechanism has a sealing plate fixed to an end of the second air spring away from the first air spring, and the guide shaft is fixed to the sealing plate.

[0008] Furthermore, the large displacement guiding support mechanism has a connecting column extending along the first direction and fixed to the base, the connecting column is hollow and connected to the air storage chamber, the connecting column at least partially extends into the interior of the first air spring, and the linear bearing is fixed to one end of the connecting column away from the base.

[0009] Furthermore, a connecting hole is formed on the side wall of the connecting column to connect the spaces on both sides of the side wall.

[0010] Furthermore, the large displacement guiding support mechanism has a connecting ring arranged between the first air spring and the second air spring for fixedly connecting the two, and the guiding assembly may also include a connecting column extending along the first direction and fixed to the base, and a guide sleeve movably arranged outside the connecting column, and the guide sleeve is fixed to the connecting ring.

[0011] Furthermore, the connecting ring includes a first ring fixed to one end of the first air spring close to the second air spring and a second ring fixed to one end of the second air spring close to the first air spring. The first ring is fixedly connected to the second ring with a sealing ring sandwiched therebetween.

[0012] Furthermore, the guide sleeve is formed by extending from the inner edge of the first ring toward the base.

[0013] Furthermore, a gap for air flow is formed between the guide sleeve and the connecting column.

[0014] The present invention also provides a vibration test platform, comprising a base, an exciter fixed on the base, and a vibration table connected to the power output end of the exciter. The vibration test device also includes a plurality of large-displacement guiding support mechanisms as described above, and the plurality of large-displacement guiding support mechanisms are distributed around the exciter and are all connected to the base and the vibration table.

[0015] Furthermore, the vibration testing device also has an air guide pipe, which is connected to the air storage chambers of several of the large displacement guide support mechanisms.

[0016] The beneficial effects of the present invention are as follows: the large displacement guiding support mechanism involved in the present invention can provide large displacement guidance, and in specific applications in a vibration test platform, based on the specific structure of the large displacement guiding support mechanism, it can meet the testing requirements of heavy-loaded and high-center-of-gravity test pieces, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 The figure shows an overall structural schematic diagram of a large displacement guide support mechanism of the present invention;

[0019] Figure 2 Shown Figure 1 An exploded schematic diagram of a large displacement guide support mechanism is shown;

[0020] Figure 3 Shown Figure 1 A schematic diagram of an axial cross section of a large displacement guide support mechanism is shown;

[0021] Figure 4 Shown Figure 3 A schematic diagram of some of the mechanisms of the structure shown;

[0022] Figure 5 Shown Figure 4 Schematic diagram of three different states of the structure shown;

[0023] Figure 6 The figure shows a schematic diagram of the integrated structure of the guide sleeve and the first ring;

[0024] Figure 7 An overall structural schematic diagram of the vibration test platform of the present invention is shown;

[0025] Figure 8 Shown Figure 7 A schematic diagram of the coordination between the large displacement guide support mechanism and the vibration table in the structure shown;

[0026] Fig. 9 Shown are schematic diagrams of the front and back sides of a specific implementation structure of a vibration table. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the large displacement guiding support mechanism involved in the present invention includes a base 100, and an air storage chamber 10 is formed inside the base 100. As further shown in the figure, the large displacement guiding support mechanism also includes a first air spring 21 and a second air spring 22 whose internal spaces are sequentially connected to the air storage chamber 10, and the first air spring 21 and the second air spring 21 are both telescopically arranged along the first direction, wherein the first air spring 21 is fixedly arranged relative to the base 10, and the second air spring 22 is fixedly arranged relative to an end of the first air spring 21 away from the base 100. In order to avoid torsion or unnecessary positional displacement when the first air spring 21 and the second air spring 22 are telescopically extended to the greatest extent, the large displacement guiding support mechanism involved in the present invention also includes a guiding component for guiding the first air spring 21 and the second air spring 22 to telescope along the first direction.

[0029] Specific to Figure 1-Figure 4 In the illustrated embodiment, the base 100 includes a main body 11 that is generally in the shape of a hollow cylinder, and a connecting portion 12 fixed to the top of the main body 11, and the first air spring 21 is fixedly connected to the connecting portion 12 of the base 100. More specifically, the connecting portion 12 includes a flange 122 fixedly connected to the top of the main body 11, and the flange 122 is locked and fixed to one end of the first air spring 21 by a plurality of bolts.

[0030] In addition, it should be understood that the “first direction” involved in the present embodiment is consistent with the length direction of the main body 11 of the base 100, and the volume of the air storage chamber 10 formed inside the base 100 is usually much larger than the volume of the internal space of the first air spring 21 and the second air spring 22. The intake or exhaust caused by the extension or contraction of the first air spring 21 and the second air spring 22 can be balanced by the air supplement or compression in the air storage chamber 10.

[0031] refer to Figure 7 As shown, the present invention also provides a vibration test platform, including a base 500, an exciter 600 fixed on the base 500, and a vibration table 700 connected to the power output end 60 of the exciter 600. The vibration test device involved in the present invention also has a plurality of large displacement guide support mechanisms as described above, and the plurality of large displacement guide support mechanisms are distributed around the exciter 600 and are all connected to the base 500 and the vibration table 700.

[0032] Specifically in the illustrated embodiment, the vibrator 600 can refer to a vibration device such as a hydraulic vibrator in the prior art that can achieve a specific displacement stroke, which can drive the vibration table 700 to perform a large displacement vertical reciprocating motion; the base 500 and the vibration table 700 are both roughly rectangular, and the vibrator 600 connects the central area of ​​the two rectangular components; four large displacement guide support mechanisms are respectively connected to the four corner areas of the two rectangular components.

[0033] It can be understood that in other embodiments of the present invention, the base 500 and the vibration table 700 are not limited to the rectangular shape shown in the figure, and the vibration test platform can also include other numbers of large displacement guide support mechanisms.

[0034] Further integration Figure 8 As shown, the vibration test device involved in the present invention also has an air guide tube 800, and the air guide tube 800 is connected to the air storage chambers 10 of a plurality of large displacement guide support mechanisms. In a specific embodiment, two ventilation interfaces 110 are provided on the base 100 of each large displacement guide support mechanism, and the air guide tube 800 is sequentially connected to the air storage chambers 10 of a plurality of large displacement guide support mechanisms through the ventilation interfaces 110, so that the air storage chamber 10 of each large displacement guide support mechanism has a consistent pressure.

[0035] In the specific implementation process, refer to Figure 8 As shown, the vibration test device also has an air inlet valve 81 connected to the air guide pipe 800 and a pressure gauge capable of indicating pressure. Based on this, the operator can more conveniently adjust the air pressure in the air storage chamber 10 of the large displacement guide support mechanism, and can timely replenish the air in the air storage chamber 10 of the large displacement guide support mechanism through an external air source, thereby adapting to the load-bearing requirements of the vibration table 700.

[0036] Further references Fig. 9 As shown in (d), the front side of the vibration table 700 of the present embodiment is provided with a plurality of side test piece mounting holes (not marked in the figure), and the test piece can be mounted and fixed based on these mounting holes. Fig. 9 As shown in (e), the back of the vibration table 700 includes an intermediate connection platform 71 and an edge connection platform 72, wherein the intermediate connection platform 71 is used to be fixedly connected to the power output end 60 of the exciter 600, and the edge connection platform 72 is used to be fixedly connected to the top of the large displacement guide support mechanism. In addition, in this specific embodiment, the back of the vibration table 700 is also provided with a plurality of reinforcing ribs 73 extending from the intermediate connection platform 71 toward the edge to strengthen the bearing capacity of the vibration table 700.

[0037] The telescopic amount of the large displacement guiding support mechanism involved in the present invention is determined by the superposition of the deformation amounts of the first air spring 21 and the second air spring 22. The superposition of the two air springs in the height direction can effectively increase the telescopic stroke, provide large displacement guidance, and increase the load-bearing capacity. In the specific application of the vibration test platform, through the cooperation of several large displacement guiding support mechanisms, the vibration table 700 is guided and supported, which can meet the test requirements of heavy-loaded high-center-of-gravity test pieces, and can effectively reduce the reaction force and overturning moment of the heavy-loaded high-center-of-gravity test pieces on the exciter 600, and has strong versatility.

[0038] In order to better understand the present invention, some detailed structures of the large displacement guide support mechanism of the present invention are further described below.

[0039] refer to Figure 2 , Figure 3 , Figure 4 As shown, in this embodiment, the guide assembly includes a guide shaft 31 whose extension direction is consistent with the first direction and a linear bearing 32 matched to the guide shaft 31. The linear bearing 32 is fixedly arranged relative to the base 100, and the guide shaft 31 is fixedly arranged relative to the end of the second air spring 22 away from the first air spring 31. Based on this arrangement, during the extension and retraction process of the large displacement guide support mechanism, the two ends of the first air spring 31 and the second air spring 22 that are relatively far away can be restricted to be relatively close or far away in the first direction without positional deviation in other directions.

[0040] More specifically, as shown in the reference figure, the large displacement guide support mechanism has a sealing plate 41 fixed to the end of the second air spring 22 away from the first air spring 21, and the guide shaft 31 is fixed to the sealing plate 41. It is relatively easy to understand that the sealing plate 41 forms a seal on the end of the second air spring 22 away from the first air spring 31, and the guide shaft 31 is fixed to the side of the sealing plate 41 facing the base 100.

[0041] In this embodiment, the large displacement guiding support mechanism has a connecting column 121 extending along the first direction and fixed to the base 100, the connecting column 121 is hollow and connected to the air storage chamber 10, the connecting column 121 at least partially extends into the interior of the first air spring 21, and the linear bearing 32 is fixed to one end of the connecting column 121 away from the base 100.

[0042] In more detail, the connecting column 121 involved in this embodiment is formed on the connecting portion 12; as shown in the figure, the connecting column 121 is extended from the inner edge of the flange 122 in the direction away from the main body 11, and the linear bearing 32 is a flange linear bearing, which is fixed to the top of the connecting column 121 by a plurality of bolts, and the guide shaft 31 is fitted into the flange linear bearing from the upper side of the flange linear bearing.

[0043] In order to make the air storage chamber 10 of the base 100 communicate with the interior of the first air spring 21, a connecting hole 1210 is formed on the side wall of the connecting column 121 to connect the spaces on both sides of the side wall. In the specific implementation process, in order to prevent the linear bearing 32 extending to the interior of the connecting column 121 from blocking the connecting hole 1210, a gap is formed between the outer wall of the linear bearing 32 extending to the interior of the connecting column 121 and the inner wall of the connecting column 121. In this way, the air in the air storage chamber 10 is reliably connected to the internal space of the first air spring through the connecting hole 1210.

[0044] Further preferably, the large displacement guide support mechanism involved in the present invention has a connecting ring 42 disposed between the first air spring 21 and the second air spring 22 for fixed connection between the two, and the guide assembly may further include a guide sleeve 4220 that is movably sleeved outside the connecting column 121, wherein the guide sleeve 4220 is fixed to the connecting ring 42. It can be understood that the two adjacent ends of the first air spring 21 and the second air spring 22 are fixedly connected by the connecting ring 42, and the guide sleeve 4220 fixed to the connecting ring 42 can further limit the telescopic action of the first air spring 21 and the second air spring 22 in the first direction by cooperating with the connecting column 121, effectively preventing the first air spring 21 and the second air spring 22 from twisting during the telescopic process.

[0045] In a specific implementation process, the connecting ring 42 includes a first ring 422 fixed to one end of the first air spring 21 close to the second air spring 22 and a second ring 421 fixed to one end of the second air spring 22 close to the first air spring 21. The first ring 422 is fixedly connected to the second ring 421 with a sealing ring 420 sandwiched therebetween. Figure 6 As shown, the mating surfaces of the first ring 422 and the second ring 421 can be formed with an annular groove, and the sealing ring 420 is arranged in the groove to form an extrusion fit between the first ring 422 and the second ring 421, thereby ensuring that a seal is formed between the two adjacent ends of the first air spring 21 and the second air spring 22.

[0046] As a preferred embodiment, as shown in the reference figure, the guide sleeve 4220 is formed by extending from the inner edge of the first ring 422 toward the base 100. That is, the guide sleeve 4220 and the first ring 422 are integrally formed, which can reduce the number of parts of the large displacement guide support mechanism and simplify its assembly process.

[0047] In order to ensure reliable communication between the internal spaces of the first air spring 21 and the second air spring 22 , a gap for air flow is formed between the guide sleeve 4220 and the connecting column 121 in this embodiment.

[0048] Figure 5 The diagram can better demonstrate the telescopic process of the large displacement guide support mechanism, as shown in the figure. The large displacement guide support mechanism has Figure 5 (a) Figure 5 (c) The two limit states shown and Figure 5(b) The equilibrium state shown, the following describes several states of the large displacement guide support mechanism in combination with the operation process of the vibration test device: before the exciter 600 is started, the uppermost end of the large displacement guide support mechanism is placed at the initial O position; when the power output end 60 of the exciter 600 drops to the lowest position, the uppermost end of the large displacement guide support mechanism is placed at -H / 2 position; when the power output end 60 of the exciter 600 rises to the highest position, the uppermost end of the large displacement guide support mechanism is placed at H / 2 position. Based on the above, the large displacement guide support mechanism involved in the present invention can achieve support and guidance of a large displacement H (usually H is not less than 300mm).

[0049] In addition, during the extension and retraction process of the large displacement guiding support mechanism described above, the internal space of the first air spring 21 and the second air spring 22 is constantly changing, but because the space of the air storage chamber 10 is much larger than the internal space of the first air spring 21 and the second air spring 22, the intake and exhaust caused by the extension and retraction state of the first air spring 21 and the second air spring 22 can be completely balanced by timely replenishment and compression of the air in the air storage chamber 10.

[0050] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0051] 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 large displacement guide support mechanism, comprising a base, wherein an air storage cavity is formed inside the base; characterized in that: The large displacement guiding support mechanism also includes an internal space and a first air spring and a second air spring connected to the air storage chamber, the first air spring and the second air spring are both telescopically arranged along a first direction, wherein the first air spring is fixedly arranged relative to the base, and the second air spring is fixedly arranged relative to an end of the first air spring away from the base; the large displacement guiding support mechanism also includes a guiding component for guiding the first air spring and the second air spring to telescope along the first direction; the guiding component includes a guiding shaft with an extension direction consistent with the first direction and a linear bearing matched to the guiding shaft, the linear bearing is fixedly arranged relative to the base, and the guiding shaft is fixedly arranged relative to an end of the second air spring away from the first air spring; The large displacement guiding support mechanism comprises a sealing plate fixed to the end of the second air spring away from the first air spring, and the guide shaft is fixed to the sealing plate; the large displacement guiding support mechanism comprises a connecting column extending along the first direction and fixed to the base, the connecting column is hollow and connected to the air storage chamber, the connecting column at least partially extends into the first air spring, and the linear bearing is fixed to the end of the connecting column away from the base; the large displacement guiding support mechanism comprises a connecting ring arranged between the first air spring and the second air spring for fixed connection between the two, and the guiding assembly may also include a connecting column extending along the first direction and fixed to the base and a guide sleeve movably arranged outside the connecting column, and the guide sleeve is fixed to the connecting ring.

2. The large displacement guide support mechanism according to claim 1, characterized in that: The side wall of the connecting column is formed with a connecting hole connecting the spaces on both sides of the side wall.

3. The large displacement guide support mechanism according to claim 1, characterized in that: The connecting ring includes a first ring fixed to one end of the first air spring close to the second air spring and a second ring fixed to one end of the second air spring close to the first air spring. The first ring is fixedly connected to the second ring with a sealing ring sandwiched therebetween.

4. The large displacement guide support mechanism according to claim 3, characterized in that: The guide sleeve is formed by extending from the inner edge of the first ring toward the base.

5. The large displacement guide support mechanism according to claim 1, characterized in that: A gap for air flow is formed between the guide sleeve and the connecting column.

6. A vibration test platform, comprising a base, a vibration exciter fixed on the base, and a vibration table connected to a power output end of the vibration exciter, characterized in that: The vibration test platform also includes a plurality of large displacement guiding support mechanisms as described in any one of claims 1 to 5, wherein the plurality of large displacement guiding support mechanisms are distributed around the exciter and are all connected to the base and the vibration table.

7. The vibration test platform according to claim 6, characterized in that: The vibration test platform also has an air guide pipe, which is connected to the air storage chambers of several large displacement guide support mechanisms.

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