Test vibration platform

Abstract

The invention discloses a test vibration platform which is characterized in that a plurality of groups of vibration mechanisms are arranged between a base and a test objective table in a regular annular array, and the mounting position can be flexibly adjusted according to the size of a test piece by arranging a mounting mechanism, so that vibration test requirements of different structures are met; according to the test vibration platform, the air cylinder is adopted as a main driving part of the vibration mechanism, so that the thrust and the bearing capacity of the vibration platform can be flexibly adjusted according to the weight and the vibration amplitude of a test piece, and therefore the vibration test requirements of a heavy structure are met; the working frequency range of the vibration table can be flexibly adjusted according to the vibration characteristics of a test piece so as to adapt to the high-frequency or low-frequency vibration test requirements, and the waveform distortion and the nonlinear effect of the vibration table can be effectively inhibited through the matching of the locking bolt and the locking hole, so that the precision and the credibility of the vibration test are improved.

Description

Technical Field

[0001] The invention relates to the technical field of product testing, in particular to a test vibration platform. Background Art

[0002] Vibration test is a commonly used method to detect and evaluate the performance and reliability of structures under dynamic loads. The core equipment of vibration test is the vibration table, which can simulate the vibration environment under various working conditions, conduct different types of vibration excitations such as sine, random, and impact on the specimen, observe and analyze the vibration response and failure mode of the specimen, and thus provide a basis for the design, optimization and improvement of the structure.

[0003] At present, there are three common vibration tables on the market: mechanical vibration table, electro-hydraulic vibration table and electric vibration table. They each have their own advantages and disadvantages, but there are also some common problems, mainly the following points: 1. The table size of the vibration table is limited and cannot meet the vibration test requirements of different structures; 2. The thrust and load capacity of the vibration table are limited and cannot meet the vibration test requirements of heavy structures; 3. The waveform distortion and nonlinear effect of the vibration table affect the accuracy and reliability of the vibration test; 4. The installation mechanism of the vibration table is complex and cumbersome, which affects the efficiency and convenience of the vibration test.

[0004] Therefore, the current vibration table technology needs to be further improved and perfected to meet the vibration test needs of structures of different types and sizes. Summary of the invention

[0005] The purpose of the present invention is to provide a test vibration platform to solve the problems existing in the existing test vibration platform mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a test vibration platform, comprising a base, a test stage and several groups of vibration mechanisms; The bottom of the base is fixedly connected with an anti-skid pad; The test stage is arranged above the base, and a mounting mechanism is provided on the test stage; A plurality of groups of vibration mechanisms are arranged between the base and the test platform in a regular annular array, and the vibration mechanisms are suitable for vibrating the test platform.

[0007] Preferably, the vibration mechanism comprises an upper connecting column, an upper movable cylinder, a lower fixed cylinder, an upper universal joint, a lower universal joint, a mounting member and a cylinder, wherein: The upper connecting column is fixedly connected to the bottom of the test stage; The upper movable cylinder is connected to the outer side of the upper connecting column; The lower fixing cylinder is fixedly connected to the top of the base; The upper end of the upper universal joint is fixedly connected to the upper movable cylinder; The lower end of the lower universal joint is fixedly connected to the lower fixed cylinder; The lower end of the mounting piece is fixedly connected to the upper end of the lower universal joint; The cylinder is mounted on the mounting member through bolts, and the output end of the cylinder is fixedly connected with the lower end of the upper universal joint.

[0008] Preferably, a first locking hole is opened in the surface of the upper connecting column, and a second locking hole is opened through the surface of the upper movable cylinder. The first locking hole and the second locking hole are connected with locking bolts through a threaded structure, and the upper connecting column is connected to the upper movable cylinder with a clearance fit.

[0009] Preferably, a plurality of groups of the first locking holes are equidistantly arranged along the height extension direction of the upper connecting column, and the second locking holes are moved to correspond to the positions of the first locking holes.

[0010] Preferably, the mounting piece is of an "L"-shaped structure, a slide groove is provided in one side of the mounting piece, a slider is fixedly connected to one side of the cylinder, the slider is slidably connected in the slide groove, and the width of the slider is adapted to the width of the slide groove, a slot is provided in the top of the mounting piece close to one side of the cylinder, and the lower end of the cylinder is matched and inserted into the slot.

[0011] Preferably, the mounting mechanism comprises several groups of base holes and several groups of mounting blocks, wherein: A plurality of groups of base holes are provided in the top of the test stage; Several sets of mounting blocks are fixed to the top of the test stage by bolts.

[0012] Preferably, a strip hole and an internal threaded hole are formed through the mounting block, and the strip hole is arranged along the length extension direction of the mounting block. The mounting block is rotated to adjust the position of the internal threaded hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The test vibration platform adopts several groups of vibration mechanisms arranged in a regular circular array between the base and the test platform. By setting the installation mechanism, the installation position can be flexibly adjusted according to the size of the test piece, so as to meet the vibration test requirements of different structures; 2. The test vibration platform uses cylinders as the main driving components of the vibration mechanism, so that the thrust and load-bearing capacity of the vibration table can be flexibly adjusted according to the weight and vibration amplitude of the test piece, thus meeting the vibration test requirements of heavy structures; 3. The test vibration platform uses upper universal joints and lower universal joints as the connecting parts of the vibration mechanism, so that the working frequency range of the vibration table can be flexibly adjusted according to the vibration characteristics of the test piece, thereby adapting to the needs of high-frequency or low-frequency vibration tests; 4. The test vibration platform uses the upper connecting column and the upper movable cylinder as the fixed parts of the vibration mechanism. Through the cooperation of the locking bolts and the lock holes, the waveform distortion and nonlinear effect of the vibration table can be effectively suppressed, thereby improving the accuracy and credibility of the vibration test; 5. The test vibration platform adopts an installation mechanism including several groups of base holes and installation blocks. Through the cooperation of the strip holes and the internal threaded holes, the installation mechanism of the vibration table is simple and convenient, thereby improving the efficiency and convenience of the vibration test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a test vibration platform of the present invention; Figure 2 Another structural schematic diagram of a test vibration platform of the present invention; Figure 3 It is a schematic diagram of the arrangement of the vibration mechanism of a test vibration platform of the present invention; Figure 4 This is a schematic diagram of the structure of a vibration mechanism of a test vibration platform of the present invention; Figure 5 This is a schematic diagram of the structure of a mounting member of a test vibration platform of the present invention; Figure 6 This is a schematic diagram of the cylinder structure of a test vibration platform of the present invention; Figure 7 It is a structural schematic diagram of an upper movable cylinder and an upper connecting column of a test vibration platform of the present invention; Figure 8 This is a schematic diagram of the upper connecting column structure of a test vibration platform of the present invention; Fig. 9 The figure is a schematic diagram of the mounting block structure of a test vibration platform of the present invention.

[0015] In the figure: 1. Base; 11. Anti-slip pad; 2. Test stage; 3. Vibration mechanism; 31. Upper connecting column; 311. First locking hole; 32. upper movable cylinder; 321. second locking hole; 33. lower fixed cylinder; 34. Upper universal joint; 35. Lower universal joint; 36. Mounting parts; 361, slide; 362, slot; 37, cylinder; 371, slider; 38, locking bolt; 4. Mounting mechanism; 41. Base hole; 42. Mounting block; 421, strip hole; 422, internal thread hole. DETAILED DESCRIPTION

[0016] 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.

[0017] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0018] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-9 The present invention provides a technical solution: a test vibration platform, including a base 1, a test platform 2 and a plurality of vibration mechanisms 3.

[0020] An anti-skid pad 11 is fixedly connected to the bottom of the base 1 .

[0021] The test stage 2 is arranged above the base 1 , and a mounting mechanism 4 is provided on the test stage 2 .

[0022] The mounting mechanism 4 includes a plurality of base holes 41 and a plurality of mounting blocks 42, wherein: A plurality of base holes 41 are provided in the top of the test stage 2; A plurality of mounting blocks 42 are fixed to the top of the test stage 2 by bolts.

[0023] Specifically, by providing a plurality of groups of base holes 41 , the mounting block 42 can be installed in multiple positions, so that the mounting mechanism 4 of the vibration platform is simple and convenient, thereby improving the efficiency and convenience of the vibration test.

[0024] The mounting block 42 is provided with a strip hole 421 and an internal thread hole 422. The strip hole 421 is arranged along the length extension direction of the mounting block 42. The mounting block 42 is rotated to adjust the position of the internal thread hole 422. Figure 1-2 The internal threaded hole 422 can be used to fix the specimen on the mounting block 42 by bolts, and the bolts can pass through the strip hole 421 and be connected to the base hole 41, so that the mounting block 42 is fixed to the top of the test platform 2, and the strip hole 421 can meet the rotation and horizontal movement of the mounting block 42, so that the position of the mounting block 42 can be adjusted according to the different specimen shapes and the installation locations, and a corresponding number of mounting blocks 42 can be selected to install the specimen, thereby increasing the adaptability and versatility of the vibration table, and by setting the mounting mechanism 4, the installation position can be flexibly adjusted according to the size of the specimen, thereby meeting the vibration test requirements of different structures.

[0025] A plurality of groups of vibration mechanisms 3 are arranged in a regular annular array between the base 1 and the test platform 2 , and the vibration mechanisms 3 are suitable for vibrating the test platform 2 .

[0026] The vibration mechanism 3 includes an upper connecting column 31, an upper movable cylinder 32, a lower fixed cylinder 33, an upper universal joint 34, a lower universal joint 35, a mounting member 36 and a cylinder 37, wherein: The upper connecting post 31 is fixedly connected to the bottom of the test stage 2; The upper movable cylinder 32 is connected to the outer side of the upper connecting column 31; The lower fixing tube 33 is fixedly connected to the top of the base 1; The upper end of the upper universal joint 34 is fixedly connected to the upper movable cylinder 32; The lower end of the lower universal joint 35 is fixedly connected to the lower fixed cylinder 33; The lower end of the mounting member 36 is fixedly connected to the upper end of the lower universal joint 35; The cylinder 37 is mounted on the mounting member 36 by means of bolts, and the output end of the cylinder 37 is fixedly connected to the lower end of the upper universal joint 34 .

[0027] Specifically, when in use, the test piece can be first fixed on the test platform 2 through the installation mechanism 4, and the upper universal joint 34 can be pushed by the cylinder 37, and the upper universal joint 34 and the upper movable cylinder 32 can move freely, so that the test platform 2 can be driven to perform corresponding position displacement through the cylinder 37, and the installation part 36 can move freely between the lower universal joint 35 and the lower fixed cylinder 33, and the installation part 36 and the cylinder 37 can move synchronously, and then through the setting of several groups of vibration mechanisms 3, the test platform 2 can be driven to vibrate in multiple positions and angles, which can simulate various environments encountered by product test pieces during the manufacturing, assembly, transportation and use execution stages, and can be used to identify whether the product test pieces have the ability to withstand environmental vibrations.

[0028] Specifically, by setting up several groups of vibration mechanisms 3, the cylinder 37 is used as the main driving component of the vibration mechanism 3, so that the thrust and load-bearing capacity of the test platform 2 can be flexibly adjusted according to the weight and vibration amplitude of the specimen, thereby adapting to the vibration test requirements of different structures, and the upper universal joint 34 and the lower universal joint 35 are used as the connecting components of the vibration mechanism 3, so that the working frequency range of the test platform 2 can be flexibly adjusted according to the vibration characteristics of the specimen, thereby adapting to high-frequency or low-frequency vibration test requirements.

[0029] A first locking hole 311 is formed in the surface of the upper connecting column 31, and a second locking hole 321 is formed in the surface of the upper movable cylinder 32. The first locking hole 311 and the second locking hole 321 are connected with locking bolts 38 through a threaded structure, and the upper connecting column 31 is inserted and connected in the upper movable cylinder 32 with clearance fit. Specifically, the upper connecting column 31 has a positioning function for the upper movable cylinder 32, so that the upper movable cylinder 32 can be positioned and moved outside the upper connecting column 31, and the waveform distortion and nonlinear effect of the test stage 2 can be effectively suppressed by adjusting the position of the upper movable cylinder 32, thereby improving the accuracy and reliability of the vibration test, and the upper connecting column 31 and the upper movable cylinder 32 can be fixedly connected by connecting the locking bolts 38 in the first locking hole 311 and the second locking hole 321.

[0030] A plurality of first locking holes 311 are equidistantly arranged along the height extension direction of the upper connecting column 31, and the second locking holes 321 are moved to correspond to the positions of the first locking holes 311. Specifically, by providing a plurality of first locking holes 311, a multi-position fixed connection between the upper connecting column 31 and the upper movable cylinder 32 can be achieved, so that the test stage 2 can be adjusted according to different vibration frequencies and amplitudes, thereby increasing the adaptability and stability of the vibration table.

[0031] The mounting member 36 is an "L"-shaped structure, with a slide groove 361 provided in one side of the mounting member 36, a slider 371 fixedly connected to one side of the cylinder 37, the slider 371 slidably connected in the slide groove 361, and the width of the slider 371 matches the width of the slide groove 361, a slot 362 is provided in the top of the mounting member 36 close to the cylinder 37, and the lower end of the cylinder 37 is matched and inserted in the slot 362. Specifically, the slide groove 361 has a positioning and movement function for the slider 371 and the cylinder 37, and the slot 362 has a limiting function for the cylinder 37, thereby improving the connection stability between the cylinder 37 and the mounting member 36, and facilitating the disassembly and assembly between the cylinder 37 and the mounting member 36, thereby increasing the flexibility and reliability of the vibration table.

[0032] For details, please refer to the attached manual. Figure 1-2 The position of the mounting block 42 is adjusted according to the different shapes of the specimens and the locations where they are installed, and a corresponding number of mounting blocks 42 can be selected to install the specimens.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test vibration platform, characterized in that: It comprises a base (1), a test platform (2) and a plurality of sets of vibration mechanisms (3); The bottom of the base (1) is fixedly connected with an anti-slip pad (11); The test stage (2) is arranged above the base (1), and a mounting mechanism (4) is provided on the test stage (2); A plurality of groups of vibration mechanisms (3) are arranged in a regular annular array between the base (1) and the test platform (2), and the vibration mechanisms (3) are suitable for vibrating the test platform (2).

2. A test vibration platform according to claim 1, characterized in that: The vibration mechanism (3) comprises an upper connecting column (31), an upper movable cylinder (32), a lower fixed cylinder (33), an upper universal joint (34), a lower universal joint (35), a mounting member (36) and a cylinder (37), wherein: The upper connecting column (31) is fixedly connected to the bottom of the test platform (2); The upper movable cylinder (32) is connected to the outer side of the upper connecting column (31); The lower fixed cylinder (33) is fixedly connected to the top of the base (1); The upper end of the upper universal joint (34) is fixedly connected to the upper movable cylinder (32); The lower end of the lower universal joint (35) is fixedly connected to the lower fixed cylinder (33); The lower end of the mounting member (36) is fixedly connected to the upper end of the lower universal joint (35); The cylinder (37) is mounted on the mounting member (36) by means of bolts, and the output end of the cylinder (37) is fixedly connected to the lower end of the upper universal joint (34).

3. A test vibration platform according to claim 2, characterized in that: A first locking hole (311) is formed in the surface of the upper connecting column (31), and a second locking hole (321) is formed in the surface of the upper movable cylinder (32). A locking bolt (38) is connected to the first locking hole (311) and the second locking hole (321) via a threaded structure, and the upper connecting column (31) is connected to the upper movable cylinder (32) with a clearance fit.

4. A test vibration platform according to claim 3, characterized in that: A plurality of groups of the first locking holes (311) are equidistantly arranged along the height extension direction of the upper connecting column (31), and the second locking holes (321) are moved to correspond to the positions of the first locking holes (311).

5. A test vibration platform according to claim 2, characterized in that: The mounting member (36) has an "L"-shaped structure, a slide groove (361) is provided in one side of the mounting member (36), a slider (371) is fixedly connected to one side of the cylinder (37), the slider (371) is slidably connected in the slide groove (361), and the width of the slider (371) matches the width of the slide groove (361), a slot (362) is provided in the top of the mounting member (36) on the side close to the cylinder (37), and the lower end of the cylinder (37) is matched and inserted into the slot (362).

6. A test vibration platform according to claim 1, characterized in that: The mounting mechanism (4) comprises a plurality of groups of base holes (41) and a plurality of groups of mounting blocks (42), wherein: A plurality of groups of base holes (41) are opened in the top of the test stage (2); A plurality of groups of mounting blocks (42) are fixed to the top of the test platform (2) by means of bolts.

7. A test vibration platform according to claim 6, characterized in that: The mounting block (42) is provided with a strip hole (421) and an internal thread hole (422) extending therethrough. The strip hole (421) is arranged along the length extension direction of the mounting block (42). The mounting block (42) is rotated to adjust the position of the internal thread hole (422).

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