Single-time multi-set circuit board vibration clamp

Abstract

According to the single-time multi-set circuit board vibration clamp provided by the utility model, a mode of simulating the box body structure of an original product is adopted, the position of the product in the box body is considered, and the clamp capable of simultaneously realizing vibration tests of a plurality of sets of circuit boards is designed, so that the working efficiency is improved by more than 6 times; problems of product appearance damage risk, time-consuming clamping and low single-time single-set vibration efficiency when the box body is adopted for vibration are effectively solved, so that the vibration test is more suitable for the requirement of batch production.

Description

Technical Field

[0001] The utility model belongs to the technical field of inertial system assembly and adjustment, and in particular relates to a single-time multiple-set circuit board vibration fixture. Background Art

[0002] During the debugging process of the circuit board, it is necessary to conduct a vibration stress screening test of the circuit board. The vibration stress screening test needs to simulate the connection relationship and position relationship of the circuit board in the box structure, and then verify the performance of the circuit board in a vibration environment.

[0003] A set of circuit boards for a certain product includes three types of circuit boards with different sizes and different installation positions. At present, in the vibration stress test stage, the test box is mainly used to install the three types of circuit boards on the vibration table according to the actual assembly position. The first type of circuit board and the second type of circuit board are combined in parallel through the pillars set at the four corners of the circuit board, such as Fig.10 As shown, the second type of circuit board is larger in size than the first type of circuit board. The combination of the first type of circuit board and the second type of circuit board is installed on the box through the two sides of the second type of circuit board and is parallel to the top plate; the third type of circuit board is installed on the box through screws set at the four corners of the circuit board. After installation, the test box is set on a vibration table to carry out a vibration test on the test box.

[0004] However, this method can only perform vibration tests on one set of circuit boards in a single vibration cycle, which is inefficient and cannot be used for batch testing. In addition, since the removal and installation process of the circuit board on the test box is complicated and cannot be performed independently by a single operator, a large amount of manpower is required for repeated operations.

[0005] Therefore, it is necessary to design a fixture that simulates the original product box structure to vibrate the circuit board. Utility Model Content

[0006] The utility model aims to solve the problems of low working efficiency and high manpower consumption in the prior art, and for this purpose provides a single-time multiple-set circuit board vibration fixture.

[0007] To achieve the above purpose, the technical solution provided by the utility model is:

[0008] A single multiple sets of circuit board vibration fixture, its special features are:

[0009] The vibration fixture comprises a hollow rectangular parallelepiped structure;

[0010] The cubic structure includes a top plate, two mounting plates and a limiting unit;

[0011] The two mounting plates are vertically fixed on the end surface of the vibration table by fasteners; the top plate is arranged on the top of the two mounting plates; and a plurality of groups of third type circuit boards are parallelly mounted on the upper end surface of the top plate by fasteners;

[0012] The distance between the two mounting plates is smaller than the width of the second type of circuit board and larger than the width of the first type of circuit board; the two mounting plates are provided with a plurality of mounting slot assemblies for mounting the second type of circuit board on opposite end faces, each of which comprises two mounting slots of the same height and parallel to each other, and the width of the mounting slots is greater than or equal to the thickness of the second type of circuit board; the assembly of the first type of circuit board and the second type of circuit board is mounted in the hollow rectangular parallelepiped structure through the cooperation of the two side edges of the second type of circuit board and the mounting slot assemblies; the distance between the upper and lower adjacent mounting slots is greater than the height of the assembly of the first type of circuit board and the second type of circuit board;

[0013] The limiting unit is installed on the side wall of the mounting plate and is used to limit the circuit board located in the hollow rectangular parallelepiped structure.

[0014] Furthermore, the top plate is provided with a plurality of groups of first mounting holes, and the first mounting holes match with the mounting holes on the side of the third type circuit board.

[0015] Furthermore, the top plate is provided with multiple groups of first mounting holes, each group includes four first mounting holes arranged in a rectangular shape, and a rectangular through hole is provided in the top plate within the rectangular area surrounded by each group of first mounting holes; the size of the rectangular through hole is smaller than that of the third type circuit board.

[0016] Further, the limiting unit includes four limiting plates;

[0017] A plurality of limit plate mounting holes are provided on the end faces of the two sides of the mounting plate; the height of the limit plate is less than or equal to the height of the mounting plate, and the width of the limit plate is greater than or equal to the depth of the mounting groove; a plurality of second mounting holes are provided on the limit plate, and the second mounting holes cooperate with the limit plate mounting holes; the four limit plates are fixed on the end faces of the two sides of the two mounting plates by fasteners.

[0018] Furthermore, a plurality of connecting ears are provided at the bottom of the mounting plate, and the connecting ears cooperate with the mounting holes of the vibration table; the two mounting plates are vertically fixed to the upper end surface of the vibration table by countersunk screws arranged in the connecting ears.

[0019] Further, the vibration fixture also includes a chassis;

[0020] The chassis matches the size of the vibration table, and is provided with a plurality of mounting holes. A plurality of hollow rectangular structures can be mounted on one chassis; the mounting plate is vertically fixed to the chassis by fasteners, and the chassis is fixed to the vibration table by fasteners.

[0021] Preferably, the straight line formed by the plurality of limiting plate mounting holes located on the same side of the same mounting plate is parallel to the mounting plate, and the limiting plate mounting holes are evenly arranged on the center line of the side wall of the mounting plate where they are located.

[0022] Preferably, the limiting unit comprises two limiting plates and a plurality of groups of pressing plate assemblies, each group of pressing plate assemblies cooperates with a group of mounting slot assemblies, and each group of pressing plate assemblies comprises two pressing plates;

[0023] A plurality of limiting plate mounting holes are provided on the end surfaces of the two side edges of the mounting plate, the height of the limiting plate is less than the height of the mounting plate, and the width of the limiting plate is greater than or equal to the depth of the mounting groove; a plurality of second mounting holes are provided on the limiting plate, and the second mounting holes match the limiting plate mounting holes;

[0024] A plurality of pressure plate mounting holes are also provided on the end surface of one side of the mounting plate, and the pressure plate mounting holes on the two mounting plates are located on the same side of the hollow rectangular structure; the plurality of pressure plate mounting holes are arranged in groups of two on both sides of the ends of each mounting slot; the plurality of pressure plates are fixed to one end of the mounting slot by fasteners, and the two limiting plates are fixed to the end surface of the mounting plate where the other end of the mounting slot is located by fasteners, so as to limit the first type of circuit board arranged in the mounting slot assembly from two directions;

[0025] The length of the pressing plate is greater than the width of the mounting groove, and the width of the pressing plate is greater than the depth of the mounting groove; the pressing plate is provided with two third mounting holes, and the number of the pressing plates is twice the number of the first type of circuit boards.

[0026] Preferably, the limiting plate and the pressing plate are both provided with rubber on the end surfaces for limiting the circuit board.

[0027] Furthermore, the resonance frequency range of the single-time multiple-set circuit board vibration fixture is 20 to 2000 Hz.

[0028] The advantages of the utility model are:

[0029] The utility model imitates the box structure of the original product and takes the position of the product in the box into consideration to design a fixture that can simultaneously realize vibration tests on multiple circuit boards, thereby improving work efficiency by more than 6 times. It effectively solves the problems of risk of damage to product appearance, time-consuming clamping, and low efficiency of single-time single-set vibration when using box vibration, making the circuit board debugging test process more suitable for the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the utility model from a front perspective;

[0031] Figure 2This is a schematic diagram of the rear view structure of the utility model;

[0032] Figure 3 It is a side view of the cubic structure;

[0033] Figure 4 It is the front view of the cubic structure;

[0034] Figure 5 It is a top view of the cubic structure;

[0035] Figure 6 It is the rear view of the cube structure;

[0036] Figure 7 Schematic diagram of the limiting plate structure;

[0037] Figure 8 It is a schematic diagram of the pressure plate structure;

[0038] Fig. 9 This is a schematic diagram for installing the third type of circuit board;

[0039] Fig.10 Schematic diagram of the first and second types of circuit boards;

[0040] Fig.11 This is a top view of the chassis.

[0041] In the figure: 1-top surface; 2-limiting plate; 3-mounting plate; 4-pressing plate; 5-rectangular through hole; 6-chassis; 7-first type circuit board; 8-second type circuit board; 9-third type circuit board; 10-connecting ear; 11-mounting slot; 12-limiting plate mounting hole; DETAILED DESCRIPTION

[0042] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments:

[0043] like Figure 1 , Figure 2 The single-time multiple-set circuit board vibration fixture shown includes at least one hollow rectangular parallelepiped structure and a chassis 6 .

[0044] like Figure 3 , Figure 4 , Figure 5 , Figure 6 The hollow rectangular parallelepiped structure shown includes a top plate 1, two mounting plates 3 and a limiting unit;

[0045] The top plate 1 is arranged at the top of the two mounting plates 3; the top plate 1 is provided with a plurality of first mounting holes for mounting the third type of circuit boards; the first mounting holes match the mounting holes on the side of the third type of circuit boards 9, and the plurality of third type of circuit boards can be mounted in parallel on the upper end surface of the top plate 1 by screwing countersunk screws into the first mounting holes and the mounting holes on the side of the third type of circuit boards 9;

[0046] Preferably, if Figure 5 As shown, in this embodiment, the top plate 1 is provided with multiple groups of first mounting holes, each group includes four first mounting holes arranged in a rectangular shape, and the top plate 1 is provided with a rectangular through hole 5 in the rectangular area surrounded by each group of first mounting holes; the size of the rectangular through hole 5 is smaller than that of the third type of circuit board, which is convenient for operators to install the third type of circuit board. In this embodiment, the upper end surface of the top plate 1 can simultaneously install up to three sets of third type circuit boards. After the third type circuit board is installed, Fig. 9 As shown, the position of the third type of circuit board in the box structure of the original product is the same.

[0047] like Figure 2 , Figure 5 As shown, the bottom end surface of the mounting plate 3 is provided with a plurality of connecting ears 10, and the connecting ears 10 match with the mounting holes of the vibration table. The two mounting plates 3 are vertically fixed on the upper end surface of the vibration table by countersunk screws arranged in the connecting ears 10, and the distance between the two mounting plates 3 is less than the width of the second type of circuit board 8 and greater than the width of the first type of circuit board 7;

[0048] like Figure 4 As shown, two mounting plates 3 are provided with a plurality of mounting slot assemblies on opposite end faces for mounting the first type of circuit board, each mounting slot assembly includes two mounting slots 11 of the same height and parallel to each other, and the width of the mounting slot 11 is greater than or equal to the thickness of the first type of circuit board;

[0049] like Fig.10 As shown, a plurality of assemblies of first-type circuit boards 7 and second-type circuit boards 8 are installed in the hollow rectangular parallelepiped structure through the cooperation between the two side edges of the second-type circuit boards and the respective mounting slot components. At this time, the first-type circuit boards 7 and the second-type circuit boards 8 are in the same position as in the original product box structure;

[0050] The distance between the upper and lower adjacent mounting grooves 11 is greater than the height of the first type of circuit board and the second type of circuit board after combination, ensuring that the adjacent circuit boards do not contact each other; preferably, the distances between the mounting grooves 11 are the same; in this embodiment, there are 4 groups of mounting groove assemblies.

[0051] In general, the limiting unit includes four limiting plates 2; Figure 4 As shown, a plurality of limit plate mounting holes 12 are provided on the end surfaces of the two sides of the mounting plate 3; preferably, the straight line formed by all the limit plate mounting holes 12 on the same side is parallel to the mounting plate 3, and all the limit plate mounting holes 12 on the same side are evenly arranged on the center line of the side end surface of the mounting plate 3, so as to reduce the installation difficulty and facilitate the operator to install the limit plate;

[0052] like Figure 7As shown, the height of the limiting plate 2 is less than or equal to the height of the mounting plate 3, and the width of the limiting plate 2 is greater than or equal to the depth of the mounting groove 11; a plurality of second mounting holes are provided on the limiting plate 2, and the second mounting holes match the limiting plate mounting holes; in this embodiment, there are four limiting plates 2, and the four limiting plates 2 are fixed to the end surfaces of the four sides of the two mounting plates 3 by countersunk screws, and are used to limit the first type of circuit board in the mounting groove assembly;

[0053] like Figure 2 As shown, in special cases, when the number of second-type circuit boards 8 to be installed in a hollow rectangular parallelepiped structure is less than the maximum number of installations of the hollow rectangular parallelepiped structure, the limiting unit includes two limiting plates 2 and a plurality of pressing plate assemblies, each group of pressing plate assemblies cooperates with a group of mounting slot assemblies, each group of pressing plate assemblies includes two pressing plates 4, and the length direction of the pressing plates 4 is perpendicular to the top plate 1; the number of pressing plates 4 is twice the number of the second-type circuit boards 8; as shown in FIG. Figure 6 As shown, in addition to the limit plate mounting hole, a plurality of pressure plate mounting holes are also provided on the end surface of one side of the mounting plate 3, and the pressure plate mounting holes on the two mounting plates 3 are located on the same side of the hollow rectangular structure; the plurality of pressure plate mounting holes are arranged in groups of two on both sides of the end of each mounting groove;

[0054] like Figure 8 As shown, in order to ensure the installation effect of the second circuit board, the length of the pressing plate 4 is greater than the width of the installation slot, and the width of the pressing plate 4 is greater than the depth of the installation slot; two third installation holes are provided on the pressing plate 4, and the pressing plate installation holes match the third installation holes. The pressing plate 4 is fixed to one end of the installation slot 11 by countersunk screws; the limiting plate 2 is installed on the end face of the installation plate where the other end of the installation slot 11 is located by countersunk screws, and together with the pressing plate 4, the first type of circuit board in the installation slot 11 assembly is limited from two directions. In order to facilitate repeated installation, the limiting plate 2 is no longer removed from the hollow cubic structure after the first installation;

[0055] In order to ensure the fastening effect and prevent the circuit board from being damaged by compression, rubber is provided on the end surfaces of the limiting plate 2 and the pressing plate 4 for limiting the circuit board.

[0056] The resonant frequency range of the utility model is 20-2000 Hz.

[0057] like Figure 1 , Figure 2 As shown, the chassis 6 matches the size of the vibration table, and the chassis 6 is provided with a plurality of mounting holes, and a plurality of hollow rectangular structures can be mounted on one chassis 6; the mounting plate 3 is vertically fixed to the chassis by countersunk screws, and the chassis 6 is fixed to the vibration table by countersunk screws passing through the connecting ears;

[0058] In this embodiment, one chassis can be mounted with two hollow rectangular parallelepiped structures.

[0059] The operation method of performing a single vibration test of multiple sets of circuit boards using this embodiment is as follows:

[0060] 1. Install two limit plates 2 on the mounting plate 3 of the hollow rectangular parallelepiped structure; the limit plates 2 are not removed from the hollow rectangular parallelepiped structure after the first installation;

[0061] 2. Insert the assembly of the first circuit board 7 and the second circuit board 8 into the mounting slot assembly, then install the pressing plate 4 on the mounting plate 3 of the hollow rectangular structure and set it opposite to the limiting plate 2, apply pressure to the circuit board to ensure that the first circuit board 7 and the second circuit board 8 are firmly installed;

[0062] 3. Install the two hollow cuboid structures that have been installed on the chassis 6;

[0063] 4. Install the chassis on the vibration table and start the vibration test of the circuit board.

[0064] This embodiment realizes the test process of simultaneously vibrating 8 sets of first-type circuit boards and second-type circuit boards and simultaneously vibrating 6 sets of third-type circuit boards at a time by installing two rectangular structures on the chassis;

[0065] In addition, by conducting a cyclic test on the circuit boards installed on the two hollow rectangular structures, during the vibration test of a single hollow rectangular structure and the circuit boards thereon, another hollow rectangular structure and the circuit boards thereon to be tested are assembled simultaneously. After the vibration test is completed, another assembled hollow rectangular structure with the circuit boards to be tested is directly installed on the chassis 6. By cyclically performing this method, vibration tests of vibrating 8 sets of first-type circuit boards and second-type circuit boards at the same time and vibrating 6 sets of third-type circuit boards at the same time are realized at a time, which greatly saves the installation time of the vibration test. Compared with before the improvement, the work efficiency is increased by more than 6 times, making the circuit board debugging test process more suitable for the needs of mass production.

[0066] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A single multiple sets of circuit board vibration fixture, characterized by: The vibration fixture comprises a hollow rectangular parallelepiped structure; The cuboid structure includes a top plate, two mounting plates and a limiting unit; The two mounting plates are vertically fixed on the end surface of the vibration table by fasteners; the top plate is arranged on the top of the two mounting plates; and a plurality of groups of third type circuit boards are parallelly mounted on the upper end surface of the top plate by fasteners; The distance between the two mounting plates is smaller than the width of the second type of circuit board and larger than the width of the first type of circuit board; the two mounting plates are provided with a plurality of mounting slot assemblies for mounting the second type of circuit board on opposite end faces, each of which comprises two mounting slots of the same height and parallel to each other, and the width of the mounting slots is greater than or equal to the thickness of the second type of circuit board; the assembly of the first type of circuit board and the second type of circuit board is mounted in the hollow rectangular parallelepiped structure through the cooperation of the two side edges of the second type of circuit board and the mounting slot assemblies; the distance between the upper and lower adjacent mounting slots is greater than the height of the assembly of the first type of circuit board and the second type of circuit board; The limiting unit is installed on the side wall of the mounting plate and is used to limit the circuit board located in the hollow rectangular parallelepiped structure.

2. The single-time multiple-set circuit board vibration fixture according to claim 1 is characterized in that: The top plate is provided with a plurality of groups of first mounting holes, and the first mounting holes match with the mounting holes on the side of the third type circuit board.

3. The single-time multiple-set circuit board vibration fixture according to claim 2, characterized in that: The top plate is provided with multiple groups of first mounting holes, each group includes four first mounting holes arranged in a rectangular shape, and the top plate is provided with a rectangular through hole in the rectangular area surrounded by each group of first mounting holes; the size of the rectangular through hole is smaller than that of the third type circuit board.

4. The single-time multiple-set circuit board vibration fixture according to claim 1, characterized in that: The limiting unit includes four limiting plates; A plurality of limit plate mounting holes are provided on the end faces of the two sides of the mounting plate; the height of the limit plate is less than or equal to the height of the mounting plate, and the width of the limit plate is greater than or equal to the depth of the mounting groove; a plurality of second mounting holes are provided on the limit plate, and the second mounting holes cooperate with the limit plate mounting holes; the four limit plates are fixed on the end faces of the two sides of the two mounting plates by fasteners.

5. The single-time multiple-set circuit board vibration fixture according to claim 1, characterized in that: The bottom of the mounting plate is provided with a plurality of connecting ears, which match with the mounting holes of the vibration table; the two mounting plates are vertically fixed on the upper end surface of the vibration table by countersunk screws arranged in the connecting ears.

6. The single-time multiple-set circuit board vibration fixture according to claim 1, characterized in that: The vibration fixture also includes a chassis; The chassis matches the size of the vibration table, and is provided with a plurality of mounting holes. A plurality of hollow rectangular structures can be mounted on one chassis; the mounting plate is vertically fixed to the chassis by fasteners, and the chassis is fixed to the vibration table by fasteners.

7. The single-time multiple-set circuit board vibration fixture according to claim 4, characterized in that: The straight line formed by the plurality of limiting plate mounting holes located on the same side of the same mounting plate is parallel to the mounting plate, and the limiting plate mounting holes are evenly arranged on the center line of the side wall of the mounting plate where they are located.

8. The single-time multiple-set circuit board vibration fixture according to claim 1, characterized in that: The limiting unit includes two limiting plates and multiple groups of pressing plate assemblies, each group of pressing plate assemblies cooperates with a group of mounting slot assemblies, and each group of pressing plate assemblies includes two pressing plates; A plurality of limiting plate mounting holes are provided on the end surfaces of the two side edges of the mounting plate, the height of the limiting plate is less than the height of the mounting plate, and the width of the limiting plate is greater than or equal to the depth of the mounting groove; a plurality of second mounting holes are provided on the limiting plate, and the second mounting holes match the limiting plate mounting holes; A plurality of pressure plate mounting holes are also provided on the end surface of one side of the mounting plate, and the pressure plate mounting holes on the two mounting plates are located on the same side of the hollow rectangular structure; the plurality of pressure plate mounting holes are arranged in groups of two on both sides of the ends of each mounting slot; the plurality of pressure plates are fixed to one end of the mounting slot by fasteners, and the two limiting plates are fixed to the end surface of the mounting plate where the other end of the mounting slot is located by fasteners, so as to limit the first type of circuit board arranged in the mounting slot assembly from two directions; The length of the pressing plate is greater than the width of the mounting groove, and the width of the pressing plate is greater than the depth of the mounting groove; the pressing plate is provided with two third mounting holes, and the number of the pressing plates is twice the number of the first type of circuit boards.

9. The single-time multiple-set circuit board vibration fixture according to claim 8, characterized in that: The limiting plate and the pressing plate are both provided with rubber on the end surfaces for limiting the circuit board.

10. The single-time multiple-set circuit board vibration fixture according to claim 1, characterized in that: The resonant frequency range of the single multiple sets circuit board vibration fixture is 20~2000Hz.

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