Novel electronic cabinet vibration test tool with high first-order inherent frequency

Abstract

The utility model discloses a novel electronic cabinet vibration test tool with a high first-order inherent frequency, which comprises a trunk main body piece and two installation pieces, and the installation pieces can move up and down on the main body piece according to requirements so as to realize adjustment in the height direction. The body of the vibration test tool is an integrated casting, the interior of the vibration test tool is hollow, the weight is reduced, meanwhile, the rigidity is high, and therefore the whole set of clamp can reach the high first-order inherent frequency. The mounting plate is of a triangular plate structure and is an integrated casting, mounting holes with multiple types of intervals are distributed in the right-angle side of the mounting plate and used for mounting of multiple types of electronic cabinets, and meanwhile the triangular face of the mounting plate is hollowed out for weight reduction, so that the tool has high universality. According to the utility model, the first-order inherent frequency exceeds 130Hz, and the problems of good transmission characteristic and flat transmission performance of the electronic cabinet in a vibration test are solved, so that the electronic cabinet can be safely, efficiently and reliably subjected to the vibration test according to related standards, and the test quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration test fixtures, in particular to a novel electronic cabinet vibration test fixture with a higher first-order natural frequency. Background Art

[0002] In recent years, large-scale, multi-type electronic cabinets have been constantly updated and replaced, and their structural forms have become increasingly diverse. In order to quickly, economically, and effectively stimulate various defects that may cause product failure under normal use conditions, it is necessary to design safe, reliable, and versatile large-scale, multi-type electronic cabinet vibration test fixtures in accordance with relevant standards. The designed fixtures must also have good transfer characteristics and flat transfer performance. By designing electronic cabinet vibration test fixtures with good rigidity and strong versatility, the electronic cabinet can be easily, quickly, and efficiently installed on the vibration fixture to complete the vibration test. Currently, large-scale electronic cabinet vibration fixtures are mostly made of steel and are manufactured by welding. As a result, their first-order natural frequency is often not high, the transfer characteristics are not ideal, and the real vibration excitation cannot be transmitted to the electronic cabinet. Utility Model Content

[0003] The purpose of the utility model is to design a new type of electronic cabinet vibration test fixture with a high first-order natural frequency, the first-order natural frequency of which exceeds 130Hz, to solve the problem of good transfer characteristics and flat transfer performance of electronic cabinets in vibration tests, so that electronic cabinets can be safely, efficiently and reliably subjected to vibration tests in accordance with relevant standards.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of electronic cabinet vibration test fixture with a higher natural frequency, the complete set of fixtures including a trunk and a mounting plate; the trunk and the mounting plate are both integrated castings, the two mounting plates are installed on both sides of the trunk through mounting holes, and the entire fixture structure is symmetrical along the center line of the two mounting plates.

[0005] Furthermore, the trunk structure is a rectangular parallelepiped with a hollow interior; a solid rectangular bottom plate is provided under the trunk, and the trunk is a bilaterally symmetrical structure with a central axis.

[0006] Furthermore, the side of the trunk used for connecting to the electronic cabinet is defined as the front, the side corresponding to the front is defined as the back, and the other two sides of the trunk are defined as the left and right sides; the bottom of the trunk is a rectangular base plate and extends in all directions, and the extension distance of the front is shorter than the extension distance of the back, left and right sides; a mounting hole is drilled in the extended part of the rectangular base plate for connecting to the vibration test bench.

[0007] Furthermore, several first trapezoidal reinforcing ribs are arranged at the connection between the extended part of the rectangular base plate and the left and right sides of the torso, and several second trapezoidal reinforcing ribs are arranged at the connection between the extended part of the rectangular base plate and the front of the torso; several triangular reinforcing ribs are arranged at the connection between the extended part of the rectangular base plate and the back of the torso; and a circular hollow is made in the middle of the first trapezoidal reinforcing rib.

[0008] Furthermore, the mounting plate structure is a triangular plate, the side where the mounting plate is connected to the trunk is the first right-angled side, and the right-angled side where the mounting plate is connected to the electronic cabinet is the second right-angled side.

[0009] Furthermore, a boss is provided on the first right-angled side for mounting and positioning the trunk and the mounting plate.

[0010] Furthermore, a triangular reinforcement rib is provided between the first right-angled side and the second right-angled side, and the triangular reinforcement rib is a hollow structure for reducing weight.

[0011] Furthermore, the first trapezoidal reinforcement ribs and the triangular reinforcement ribs are arranged at equal distances; the heights of the first trapezoidal reinforcement ribs and the triangular reinforcement ribs are consistent and exceed 0.5 times the height of the trunk, and the height of the second trapezoidal reinforcement ribs exceeds the heights of the first trapezoidal reinforcement ribs and the triangular reinforcement ribs.

[0012] Compared with the existing technology, the beneficial effects of the present invention are: novel structure, strong mechanical properties, simple installation method, and matching installation of multiple types of electronic cabinets can be achieved by moving the installation components, solving the universality problem, significantly improving the test efficiency, and having good promotion and application value.

[0013] In order to more clearly illustrate the functional characteristics and structural parameters of the present invention, further description will be given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 This is a three-dimensional schematic diagram of the structure of a new type of electronic cabinet vibration test fixture with a higher first-order natural frequency proposed by the utility model;

[0016] Figure 2 This is a three-dimensional schematic diagram of the mounting plate structure of the utility model;

[0017] The figures in the figure are marked as follows: 1-trunk, 2-mounting plate, 3-first trapezoidal reinforcement rib, 4-second trapezoidal reinforcement rib, 5-triangular reinforcement rib, 6-rectangular bottom plate, 7-first right angle side, 8-second right angle side, 9-boss, 10-triangular reinforcement rib. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1-Figure 2 The figure shows a novel electronic cabinet vibration test fixture with a high first-order natural frequency. The fixture consists of a body 1 and a mounting plate 2. Both are integral castings, with the two mounting plates 2 attached to either side of the body 1 via mounting holes. The fixture is bilaterally symmetrical along the centerline of the two mounting plates 2. The body 1 is a rectangular parallelepiped with a hollow interior. A solid rectangular base plate 6 is positioned beneath the body 1, forming a bilaterally symmetrical structure about its central axis. The side of the body 1 connecting to the electronic cabinet is defined as the front, the side corresponding to the front is defined as the back, and the other two sides of the body 1 are defined as the left and right. The bottom of the body 1 is a rectangular base plate 6 that extends in all directions, with the front extending shorter than the back, left, and right sides. Mounting holes are drilled in the extended portion of the rectangular base plate 6 for connection to the vibration test bench. The first-order natural frequency of this vibration test fixture reaches above 130 Hz.

[0020] Several first trapezoidal reinforcing ribs 3 are arranged at the connection between the extended part of the rectangular base plate 6 and the left and right sides of the torso 1, and several second trapezoidal reinforcing ribs 4 are arranged at the connection between the extended part of the rectangular base plate 6 and the front of the torso 1; several triangular reinforcing ribs 5 are arranged at the connection between the extended part of the rectangular base plate 6 and the back of the torso 1; the middle of the first trapezoidal reinforcing rib 3 is circularly hollowed out.

[0021] Mounting plate 2 is a triangular plate. The edge connecting mounting plate 2 to trunk 1 is a first right-angled edge 7, and the edge connecting mounting plate 2 to the electronic cabinet is a second right-angled edge 8. First right-angled edge 7 is provided with a boss 9 for positioning trunk 1 and mounting plate 2. Triangular reinforcement ribs 10 are provided between first and second right-angled edges 7 and 8. These hollowed-out ribs are used to reduce weight.

[0022] The first trapezoidal reinforcement rib 3 and the triangular reinforcement rib 5 are arranged at equal distances; the height of the first trapezoidal reinforcement rib 3 and the triangular reinforcement rib 5 are consistent and exceed 0.5 times the height of the trunk 1, and the height of the second trapezoidal reinforcement rib 4 exceeds the height of the first trapezoidal reinforcement rib 3 and the triangular reinforcement rib 5.

[0023] Specifically, in one embodiment, the thickness of the rectangular bottom plate 6 is at least three times the thickness of the upper portion of the trunk 1 .

[0024] Specifically, in one embodiment, the second right-angled side 8 is a smooth surface with distributed mounting holes for connection with an electronic cabinet.

[0025] Specifically, in one embodiment, the mounting plate 2 can adjust the mounting height to accommodate different test samples.

[0026] Specifically, in one embodiment, the test conditions applicable to the set of fixtures are as follows:

[0027] Sine test: 5 Hz–16 Hz, 1 mm (0-p);

[0028] 16Hz–60Hz, 1g;

[0029] 60Hz–160Hz, 2.5g.

[0030] The fixture of the utility model is divided into two major parts according to the functional area, namely the trunk 1 and the mounting plate 2. The trunk 1 is an integrated casting with a hollow interior, which achieves weight reduction while having high rigidity, so that the whole fixture can achieve a high first-order natural frequency; the mounting plate 2 is a triangular plate structure, which is an integrated casting. The right-angled sides of the mounting plate 2 are distributed with mounting holes of various types of spacing, which are used for installation with various types of electronic cabinets. At the same time, the triangular surface of the mounting plate is hollowed out to reduce weight, so that the tooling has high versatility; the thickness of the rectangular bottom plate 6 in the lower half of the trunk 1 is more than 3 times the thickness of the upper half of the trunk, so as to ensure the overall strength of the fixture while having a lower center of gravity. The holes of the rectangular bottom plate 6 are arranged according to the holes of the vibration table;

[0031] To use this utility model, use a sling to tie the mounting plate at the opening and then lift it using a crane. Lift the fixture above the vibration table and align it with the mounting holes on the vibration table. Once the position is correct, lower the fixture and secure it to the vibration table with screws. Next, use the crane to lift the test sample electronic cabinet near the fixture. The operator pushes the cabinet until the back mounting plate aligns with the fixture mounting plate. Observe the alignment of the back mounting holes on the cabinet and the mounting holes on the fixture mounting plate. Once alignment is confirmed, install the screws. Once preparations are complete, the vibration test can begin.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of electronic cabinet vibration test fixture with a high first-order natural frequency, characterized by: The entire set of fixtures comprises a trunk (1) and a mounting plate (2); the trunk (1) and the mounting plate (2) are both integral castings, the two mounting plates (2) are mounted on both sides of the trunk (1) through mounting holes, and the entire set of fixtures is symmetrical along the center lines of the two mounting plates (2).

2. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 1 is characterized in that: The trunk (1) is a rectangular parallelepiped structure with a hollow interior. A solid rectangular bottom plate (6) is provided below the trunk (1), and the trunk (1) is a bilaterally symmetrical structure with a central axis.

3. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 1 is characterized in that: The side of the trunk (1) used for connecting with the electronic cabinet is defined as the front, the side corresponding to the front is defined as the back, and the other two sides of the trunk (1) are defined as the left and right sides; the bottom of the trunk (1) is a rectangular base plate (6) extending in all directions, and the extension distance of the front is shorter than the extension distances of the back, left and right sides; a mounting hole is drilled in the extended part of the rectangular base plate (6) for connecting with the vibration test bench.

4. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 3 is characterized in that: Several first trapezoidal reinforcing ribs (3) are provided at the connection between the extended portion of the rectangular base plate (6) and the left and right sides of the trunk (1); several second trapezoidal reinforcing ribs (4) are provided at the connection between the extended portion of the rectangular base plate (6) and the front of the trunk (1); several triangular reinforcing ribs (5) are provided at the connection between the extended portion of the rectangular base plate (6) and the back of the trunk (1); and the middle of the first trapezoidal reinforcing ribs (3) is circularly hollowed out.

5. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 1 is characterized in that: The mounting plate (2) is a triangular plate; the side where the mounting plate (2) is connected to the trunk (1) is a first right-angled side (7); and the right-angled side where the mounting plate (2) is connected to the electronic cabinet is a second right-angled side (8).

6. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 5 is characterized in that: The first right-angled side (7) is provided with a boss (9) for mounting and positioning the trunk (1) and the mounting plate (2).

7. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 5 is characterized in that: A triangular reinforcing rib (10) is provided between the first right-angled side (7) and the second right-angled side (8); the triangular reinforcing rib (10) is a hollow structure for reducing weight.

8. The novel electronic cabinet vibration test fixture with a higher first-order natural frequency according to claim 4 is characterized in that: The first trapezoidal reinforcing ribs (3) and the triangular reinforcing ribs (5) are arranged at equal distances; the heights of the first trapezoidal reinforcing ribs (3) and the triangular reinforcing ribs (5) are consistent and exceed 0.5 times the height of the trunk (1); and the height of the second trapezoidal reinforcing ribs (4) exceeds the heights of the first trapezoidal reinforcing ribs (3) and the triangular reinforcing ribs (5).

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