Large-stroke electric impact table

Abstract

A large-stroke electric impact table comprises a base, and a magnetic cylinder body is fixedly arranged on the base. The magnetic cylinder body comprises a plurality of magnetic cylinder rings which are sequentially connected in the impact direction, end plates connected to outer end ring openings of the magnetic cylinder rings at the two ends and magnet exciting coils detachably connected to the interior of at least one magnetic cylinder ring. A moving coil part is arranged in the magnetic cylinder body, and the two ends of the moving coil part respectively penetrate through the two end surfaces of the magnetic cylinder body and are connected with the test piece mounting table surface and the buffer device. According to the utility model, through modular design of the magnetic cylinder body, the multi-section type magnetic cylinder body can be assembled according to the stroke requirement, the axial length of the winding is large, the displacement space of the moving coil is large, large-displacement impact can be realized, the manufacturing and assembling difficulty of the whole electric impact table is greatly reduced, the flexibility is high, and subsequent maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of vibration test devices, in particular to a large-stroke electric impact table. Background Art

[0002] The working principle of the electric impact table is to use alternating current to drive the moving coil winding to move up and down repeatedly under the action of the magnetic field. During the movement of the moving coil, a guide structure is generally required to prevent the moving coil from shaking in the radial direction.

[0003] The impact indicators that can be achieved by traditional dynamic guide structures and winding lengths are relatively low, mainly low impact displacement and impact velocity. When large-stroke vibration or impact tests are required, this traditional electric impact table cannot meet the requirements.

[0004] In this regard, in the prior art, a method of extending the moving coil frame, the magnetic cylinder body and the guide structure is usually adopted to achieve a long stroke, but this also increases the difficulty of manufacturing and installing the impact table.

[0005] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a topic to be studied and solved in the present invention. Utility Model Content

[0006] The utility model aims to provide an electric impact table with a large stroke.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A long-stroke electric impact table comprises a base, on which a magnetic cylinder is fixedly arranged;

[0009] The magnetic cylinder body comprises a plurality of magnetic cylinder rings connected in sequence along the impact direction, end plates connected to the outer end ring openings of the magnetic cylinder rings at both ends, and an excitation coil detachably connected to the inside of at least one of the magnetic cylinder rings;

[0010] The magnetic cylinder body has a moving coil component inside, and two ends of the moving coil component respectively penetrate the two end surfaces of the magnetic cylinder body and are connected to the test piece installation table and the buffer device.

[0011] In a further solution, the magnetic cylinder ring with the excitation coil connected thereto comprises an inner cylinder ring and an outer cylinder ring, and the inner cylinder ring, the excitation coil and the outer cylinder ring are nested in sequence from the inside to the outside.

[0012] In a further solution, when the excitation coils are arranged in two or more, adjacent excitation coils are arranged at intervals, and the two ends of the inner cylinder ring on the inner side are respectively clamped and connected with the adjacent end faces of the magnetic cylinder ring, and one end of the outer cylinder ring on the outer side is screwed to the adjacent outer cylinder ring.

[0013] In a further solution, the two ends of the inner cylinder ring are connected to the adjacent end faces of the magnetic cylinder ring by means of protrusions and grooves respectively.

[0014] In a further solution, the dynamic coil component includes a dynamic coil winding, a dynamic coil frame and a guide structure;

[0015] The moving coil winding is arranged on the moving coil frame, and both are located inside the magnetic cylinder body;

[0016] The guide structure is detachably connected to the moving coil frame, and two ends of the guide structure respectively penetrate through the two end surfaces of the magnetic cylinder body and are connected to the specimen mounting table and the buffer device.

[0017] In a further solution, the guide structure includes two groups of guide rods connected to the two ends of the dynamic coil frame and respectively passing through the two end plates, wherein the outer ends of one group of guide rods are connected to the specimen mounting table through a first end connecting plate, and the outer ends of the other group of guide rods are connected to the buffer device through a second end connecting plate.

[0018] In a further solution, the specimen mounting table is arranged in a protective cover, and the protective cover is fixedly connected to the base.

[0019] In a further solution, the buffer device is arranged in an air collecting hood, and the air collecting hood is sealed and connected to the magnetic cylinder body.

[0020] In a further solution, the buffer device includes at least one folding frame that is telescopic in the impact direction and a damping structure provided at at least one end of the folding frame;

[0021] When the damping structure is arranged at one end of the folding frame, the one end of the folding frame is rotatably connected to the damping structure through a rotating shaft, the damping structure is connected to the end plate, and the other end of the folding frame is rotatably connected to a mounting plate through a rotating shaft, and the mounting plate is connected to the second end connecting plate;

[0022] When the damping structures are arranged at two ends of the folding frame, the two ends of the folding frame are respectively rotatably connected to the damping structures through a rotating shaft, and the two damping structures are respectively connected to the end plate and the second end connecting plate.

[0023] In a further solution, the damping structure includes an outer frame connected to the end plate, and a mounting groove is provided on the outer frame corresponding to the rotating shaft. The mounting groove and the rotating shaft are the same equilateral polygonal prism, and the edges and corners of the mounting groove correspond one by one to the wall surfaces of the rotating shaft, and at least one elastomer is provided between the corresponding edges and corners and the wall surfaces.

[0024] The working principle and advantages of this utility model are as follows:

[0025] The utility model adopts a modular design of the magnetic cylinder body, and the multi-section magnetic cylinder body can be assembled according to the stroke requirements. The axial length of the winding is large, the displacement space of the moving coil is large, and a large displacement impact can be achieved. The manufacturing and assembly difficulty of the entire electric impact table is greatly reduced, the flexibility is high, and subsequent maintenance is convenient.

[0026] The utility model interlaces and assembles the guide structure with the magnetic cylinder body, not only the guide space is large and suitable for large displacement impact, but also the guide structure is simple and stable and the guide precision is high.

[0027] The buffer device of the utility model adopts the form of a folding frame and a damping structure, which can realize a small space occupation during stretching with a large displacement and contraction, is suitable for large displacement impact, and has a good buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0029] Attached Figure 2 It is an overall top view of an embodiment of the utility model;

[0030] Attached Figure 3 It is an overall cross-sectional view of an embodiment of the utility model;

[0031] Attached Figure 4 It is a cross-sectional axonometric view of an embodiment of the utility model;

[0032] Attached Figure 5 For the utility model embodiment Figure 4 A magnified view of the structure of part A;

[0033] Attached Figure 6 This is an axonometric view of the moving coil component of an embodiment of the utility model;

[0034] Attached Figure 7 This is an axonometric diagram of a buffer device according to an embodiment of the utility model;

[0035] Attached Figure 8 This is an axonometric diagram of the damping structure of an embodiment of the utility model.

[0036] In the above attached figure:

[0037] 1. Base;

[0038] 2. Magnetic cylinder;

[0039] 21. The first magnetic cylinder ring;

[0040] 211. Inner cylinder ring;

[0041] 212. Outer cylinder ring;

[0042] 22. The second magnetic cylinder ring;

[0043] 23. End plate;

[0044] 24. Excitation coil;

[0045] 3. Moving coil components;

[0046] 31. Moving coil winding;

[0047] 32. Dynamic armature frame;

[0048] 33. Guidance structure;

[0049] 331. Guide rod;

[0050] 332. First end connecting plate;

[0051] 333. Second end connecting plate;

[0052] 4. Specimen installation table;

[0053] 5. Buffer device;

[0054] 51. Folding rack;

[0055] 52. Damping structure;

[0056] 521. External frame;

[0057] 522. Mounting slot;

[0058] 523. Elastomers;

[0059] 53. Mounting plate;

[0060] 54. Rotating shaft;

[0061] 6. Protective cover;

[0062] 7. Wind collecting hood;

[0063] 8. Raised part;

[0064] 9. Groove;

[0065] 10. Long screws. DETAILED DESCRIPTION

[0066] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0067] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0068] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0069] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0070] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0071] The words “include,” “including,” and “have” used in this document are open-ended terms, meaning including but not limited to.

[0072] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0073] See attached Figure 1-8 A large-stroke electric impact table comprises a base 1 on which a magnetic cylinder 2 is fixedly arranged; the base 1 and the magnetic cylinder 2 can be placed horizontally to serve as a horizontal impact table. Figure 1 The base 1 and the magnetic cylinder body 2 can also be placed vertically to serve as a vertical impact table (not shown in the figure).

[0074] The magnetic cylinder body 2 includes a plurality of magnetic cylinder rings connected in sequence along the impact direction, end plates 23 connected to the outer end ring openings of the magnetic cylinder rings at both ends, and an excitation coil 24 detachably connected to the inside of at least one of the magnetic cylinder rings; wherein the magnetic cylinder ring with the excitation coil 24 inside is the first magnetic cylinder ring 21, and the magnetic cylinder ring without the excitation coil 24 is the second magnetic cylinder ring 22. The number of the two magnetic cylinder rings can be selected according to the stroke requirements.

[0075] The magnetic cylinder body 2 has a moving coil component 3 inside, and the two ends of the moving coil component 3 respectively penetrate the two end surfaces of the magnetic cylinder body 2 and are connected to the specimen mounting table 4 and the buffer device 5. The specimen mounting table 4 is arranged in a protective cover 6, and the protective cover 6 is fixedly connected to the base 1. The buffer device 5 is arranged in an air collecting hood 7, and the air collecting hood 7 is sealed and connected to the magnetic cylinder body 2. An air outlet is arranged on the air collecting hood 7, and air outlets are arranged on the two end plates 23 of the magnetic cylinder body 2, wherein the air outlet away from the air collecting hood 7 is an air inlet, and the air inlet and the air outlet are connected to the air cooling system through an air duct, and the cold air output by the air cooling system can pass through the inner cavity of the magnetic cylinder body 2 to dissipate heat for the magnetic cylinder body 2 and the moving coil component 3 (not shown in the figure).

[0076] When the moving coil component 3 is in a conductive state, it can reciprocate along the impact direction inside the magnetic cylinder body 2 and carry the specimen mounting table 4 to impact back and forth. The buffer device 5 is continuously compressed and stretched back and forth to achieve a buffering effect.

[0077] In this embodiment, the magnetic cylinder ring (first magnetic cylinder ring 21 ) with the excitation coil 24 connected thereto includes an inner cylinder ring 211 and an outer cylinder ring 212 . The inner cylinder ring 211 , the excitation coil 24 and the outer cylinder ring 212 are nested in sequence from the inside to the outside.

[0078] When two or more excitation coils 24 are provided, adjacent excitation coils 24 are spaced apart from each other. This design can be beneficial to heat dissipation of the excitation coils 24 .

[0079] In this embodiment, when two excitation coils 24 are provided, the two excitation coils 24 are respectively arranged in one first magnetic cylinder ring 21, that is, the first magnetic cylinder ring 21 and the second magnetic cylinder ring 22 are arranged alternately; during installation, the excitation coil 24 is directly and completely sleeved on the outside of the inner cylinder ring 211, and the outer cylinder ring 212 is completely sleeved on the outside of the excitation coil 24, and the assembly of the first magnetic cylinder ring 21 is completed. Figure 4-5 In other embodiments, two excitation coils 24 can be arranged in one first magnetic cylinder ring 21 at the same time, but the inner cylinder ring 211 and the outer cylinder ring 212 are connected in the middle, that is, the cross-section of the entire steel ring structure is an "I" shape, and the two excitation coils 24 are arranged in the openings on both sides of the "I" shape (not shown in the figure).

[0080] The two ends of the inner cylinder ring 211 on the inner side of the excitation coil 24 are respectively connected by clamping with the adjacent end faces of the magnetic cylinder ring. Specifically, the two ends of the inner cylinder ring 211 are respectively connected by clamping with the adjacent end faces of the magnetic cylinder ring through the protrusion 8 and the groove 9; one end of the outer cylinder ring 212 on the outer side of the excitation coil 24 is connected to the adjacent outer cylinder ring 212 by screws.

[0081] In this embodiment, the second magnetic cylinder ring 22 is fixedly installed in the base 1 by means of structures such as screws and a mounting seat.

[0082] When assembling the magnetic cylinder body 2, one of the second magnetic cylinder rings 22 can be installed and fixed first, and then the other magnetic cylinder rings can be installed in sequence on both sides.

[0083] When the second magnetic cylinder ring 22 is next to the first magnetic cylinder ring 21, the inner steel ring of the first magnetic cylinder ring 21 can be assembled with the second magnetic cylinder ring 22 by means of the protrusion 8 and the groove 9, and then the excitation coil 24 and the outer cylinder ring 212 are put on in sequence, and finally the long screw 10 is inserted from the outer end face of the outer cylinder ring 212 to fix the outer cylinder ring 212 and the end face of the second magnetic cylinder ring 22 together. The protrusion 8 and the groove 9 are both set in an annular shape.

[0084] After all the magnetic cylinder rings are installed, the end plates 23 can be fixedly installed at the ring openings at both ends by screws, and then the wind collecting cover 7 can be fixedly installed at one end of the magnetic cylinder body 2.

[0085] In this embodiment, see the attached Figure 3-6 The dynamic coil component 3 includes a dynamic coil winding 31, a dynamic coil frame 32 and a guide structure 33;

[0086] The dynamic coil frame 32 is cylindrical, with a hollow surface and an internal support tripod inside; the dynamic coil winding 31 is arranged on the dynamic coil frame 32, and both are located inside the magnetic cylinder body 2;

[0087] The guide structure 33 is detachably connected to the moving coil frame 32 , and two ends thereof respectively penetrate through the two end surfaces of the magnetic cylinder body 2 and are connected to the specimen mounting table 4 and the buffer device 5 .

[0088] Among them, the guide structure 33 includes two groups of guide rods 331 connected to the two ends of the dynamic coil skeleton 32 and respectively passing through the two end plates 23, wherein the outer end of one group of guide rods 331 is connected to the specimen mounting table 4 through a first end connecting plate 332, and the outer end of the other group of guide rods 331 is connected to the buffer device 5 through a second end connecting plate 333.

[0089] When the dynamic coil component 3 is assembled, the dynamic coil winding 31 can be wound around the dynamic coil frame 32, and then the guide rod 331 is threadedly installed on the end surface of the dynamic coil frame 32;

[0090] When the moving coil component 3 is installed in the magnetic cylinder body 2, the end plates 23 at both ends of the magnetic cylinder body 2 are not installed first. The entire moving coil component 3 is inserted into the inner cavity of the magnetic cylinder body 2, and then the sleeve on the end plate 23 is aligned with the guide rod 331, and the end plate 23 is installed in place; after the end plate 23 is installed, the two end connecting plates are fixed to the ends of the two groups of guide rods 331 by screws, and finally the specimen mounting table 4 and the buffer device 5 are installed.

[0091] In this embodiment, two buffer devices 5 are provided, and the buffer device 5 includes at least one folding frame 51 that is telescopic in the impact direction and a damping structure 52 provided at at least one end of the folding frame 51; the folding frame 51 is an X-shaped folding frame.

[0092] When the damping structure 52 is arranged at one end of the folding frame 51, the one end of the folding frame 51 is rotatably connected to the damping structure 52 through the rotating shaft 54, and the damping structure 52 is connected to the end plate 23, and the other end of the folding frame 51 is rotatably connected to a mounting plate 53 through the rotating shaft 54, and the mounting plate 53 is connected to the second end connecting plate 333. Figure 4 ;

[0093] When the damping structure 52 is arranged at both ends of the folding frame 51, the two ends of the folding frame 51 are respectively rotatably connected to the damping structure 52 through the rotating shaft 54, and the two damping structures 52 are respectively connected to the end plate 23 and the second end connecting plate 333 (not shown in the figure).

[0094] Among them, see Appendix Figure 7 The damping structure 52 includes an outer frame 521 connected to the end plate 23, and a mounting groove 522 is arranged on the outer frame 521 corresponding to the rotating shaft 54. The mounting groove 522 and the rotating shaft 54 ​​are the same equilateral polygonal prism, and the edges and corners of the mounting groove 522 correspond to the wall surfaces of the rotating shaft 54 ​​one by one, and at least one elastic body 523 is arranged between the corresponding edges and corners and the wall surfaces.

[0095] In this embodiment, the mounting groove 522 and the rotating shaft 54 ​​may be an equilateral triangle, a square, an equilateral pentagon, etc.; the elastic body 523 may be set to be cylindrical and made of rubber material.

[0096] When the dynamic coil component 3 reciprocates, the folding frame 51 expands and contracts along with the movement. At this time, the elastic body 523 is restricted by the cavity of the installation groove 522. When the rotating shaft 54 ​​rotates, the elastic body 523 will be gradually compressed. The elastic body 523 generates resistance to the rotation of the rotating shaft 54, so that the folding frame 51 also has resistance in the folding direction (impact direction), which has a good buffering effect.

[0097] In addition, by setting the elastic body 523 to be cylindrical and made of rubber material, when the rotating shaft 54 ​​rotates, the elastic body 523 can rotate, is not easily squeezed and damaged, and has a good buffering effect.

[0098] The entire electric impact table adopts a modular design, which greatly reduces the difficulty of manufacturing and assembly, and has a stable guide. It can be assembled according to stroke requirements, has high flexibility, and is also convenient for subsequent maintenance.

[0099] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A long-stroke electric impact table, characterized in that: It comprises a base, on which a magnetic cylinder body is fixedly arranged; The magnetic cylinder body comprises a plurality of magnetic cylinder rings connected in sequence along the impact direction, end plates connected to the outer end ring openings of the magnetic cylinder rings at both ends, and an excitation coil detachably connected to the inside of at least one of the magnetic cylinder rings; The magnetic cylinder body has a moving coil component inside, and two ends of the moving coil component respectively penetrate the two end surfaces of the magnetic cylinder body and are connected to the test piece installation table and the buffer device.

2. The long-stroke electric impact table according to claim 1, characterized in that: The magnetic cylinder ring with an excitation coil connected thereto comprises an inner cylinder ring and an outer cylinder ring, and the inner cylinder ring, the excitation coil and the outer cylinder ring are nested in sequence from the inside to the outside.

3. The long-stroke electric impact table according to claim 2, characterized in that: When the excitation coils are arranged in two or more, adjacent excitation coils are arranged at intervals, and the two ends of the inner cylinder ring on the inner side are respectively connected to the end faces of the adjacent magnetic cylinder rings by clamping, and one end of the outer cylinder ring on the outer side is connected to the adjacent outer cylinder ring by screws.

4. The long-stroke electric impact table according to claim 3, characterized in that: The two ends of the inner cylinder ring are connected to the adjacent end faces of the magnetic cylinder ring by means of protrusions and grooves respectively.

5. The long-stroke electric impact table according to claim 1, characterized in that: The dynamic coil component includes a dynamic coil winding, a dynamic coil frame and a guide structure; The moving coil winding is arranged on the moving coil frame, and both are located inside the magnetic cylinder body; The guide structure is detachably connected to the moving coil frame, and two ends of the guide structure respectively penetrate through the two end surfaces of the magnetic cylinder body and are connected to the specimen mounting table and the buffer device.

6. The long-stroke electric impact table according to claim 5, characterized in that: The guide structure includes two groups of guide rods connected to the two ends of the dynamic coil frame and respectively passing through the two end plates, wherein the outer end of one group of guide rods is connected to the specimen mounting table through a first end connecting plate, and the outer end of the other group of guide rods is connected to the buffer device through a second end connecting plate.

7. The long-stroke electric impact table according to claim 5, characterized in that: The test piece installation table is arranged in a protective cover, and the protective cover is fixedly connected to the base.

8. The long-stroke electric impact table according to claim 5, characterized in that: The buffer device is arranged in an air collecting hood, and the air collecting hood is sealed and connected to the magnetic cylinder body.

9. The long-stroke electric impact table according to claim 6, characterized in that: The buffer device comprises at least one folding frame that is telescopic in the impact direction and a damping structure arranged at at least one end of the folding frame; When the damping structure is arranged at one end of the folding frame, the one end of the folding frame is rotatably connected to the damping structure through a rotating shaft, the damping structure is connected to the end plate, and the other end of the folding frame is rotatably connected to a mounting plate through a rotating shaft, and the mounting plate is connected to the second end connecting plate; When the damping structures are arranged at two ends of the folding frame, the two ends of the folding frame are respectively rotatably connected to the damping structures through a rotating shaft, and the two damping structures are respectively connected to the end plate and the second end connecting plate.

10. The long-stroke electric impact table according to claim 9, characterized in that: The damping structure includes an outer frame connected to the end plate, and a mounting groove is arranged on the outer frame corresponding to the rotating shaft. The mounting groove and the rotating shaft are the same equilateral polygonal prism, and the edges and corners of the mounting groove correspond to the wall surfaces of the rotating shaft one by one, and at least one elastic body is arranged between the corresponding edges and corners and the wall surfaces.

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