CN114279669A - Electronic equipment chassis multi-angle shock vibration test fixture and method - Google Patents

Abstract

The invention discloses a multi-angle impact vibration test fixture and method for an electronic equipment chassis, including a chassis vibration test frame, the chassis vibration test frame includes an installation frame and a clamping frame, and the installation frame includes a bottom plate and a bracket mounted on the bottom plate. A vertical plate, a rotating shaft is installed on the vertical plate through a bearing, and the two shaft ends of the rotating shaft respectively protrude out of the left and right end faces of the vertical plate; the clamping frame is installed on one side of the vertical plate on the corresponding rotating shaft On the shaft end; a ratchet mechanism is installed between the other shaft end of the rotating shaft and the corresponding end face of the vertical plate, and a limit mechanism for restricting the positive rotation angle of the ratchet mechanism to drive the clamping frame is arranged on the end face of the vertical plate . The invention adopts the mechanism of manually pressing the electronic equipment case, can adjust the pushing distance of the pressing block, and has strong adaptability;

Description

Electronic equipment chassis multi-angle shock vibration test fixture and method

technical field

The invention relates to a shock-resistant vibration test of electronic equipment, in particular to a multi-angle shock-vibration test fixture and method of an electronic equipment chassis.

Background technique

During the service of electronic equipment, the equipment will be harmed by instantaneous shock and vibration. Therefore, it is necessary to check whether the function and performance of the electronic equipment meet the requirements under the expected impact environment conditions, and whether the structure of the electronic equipment has residual deformation. cracks and other mechanical damage.

According to the requirements of the relevant test standards for shock and vibration of electronic equipment, it is necessary to apply shocks to the electronic equipment for the specified number of times along the 6 axes of the 3 orthogonal axes. However, the table tops of the commonly used shock and vibration test benches on the market are all horizontal, and the table tops cannot be rotated, and most electronic devices are flat box-shaped boxes. Shock, the front and rear axles and the left and right axles cannot be impacted. Therefore, it is necessary to design a fixture for vertical placement and fixing of electronic equipment to assist in testing the shock and vibration resistance of the front and rear axles and the left and right axles of the electronic equipment.

At present, there are three main structural forms of electronic equipment chassis clamps: L-shaped, inverted T-shaped and box-shaped, but most of them can only clamp the equipment in one direction, and cannot impose other directional constraints or easily adjust the shock and vibration angle.

For example, the utility model patent of "Clamp on the Falling Ball Impact Tester" with the authorization number of CN204740175U, discloses a clamp with an extrusion device. The extrusion device mainly includes a push rod, a spring and a fixing plate. Clamping the test item, the compression force is small, and it is not suitable for clamping the electronic equipment chassis with large self-weight in the shock and vibration test.

For example, the invention patent of "a drop-weight multi-angle impact fixture with stable impact position" with application number CN110658059A discloses a drop-weight multi-angle impact fixture with stable impact position. The turret is a special-shaped structure, which is not easy to process. take shape.

For example, the utility model patent of "a fixture for vibration and impact test" with the authorization number of CN208921386U, discloses a fixture that can be rotated by 90°. The structure of the fixture is relatively simple, but there is no clamping device for parts, and it is only suitable for Chassis mounted directly on a riser.

The structures of the above-mentioned patent applications cannot be directly fixed to the vertical plate for the electronic equipment chassis, so there is currently no suitable fixture available.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an impact and vibration test fixture and method that can realize multi-angle clamping of an electronic equipment chassis.

The electronic equipment chassis multi-angle impact vibration test fixture that can solve the above technical problems, its technical solution includes a chassis vibration test frame, the difference is that the chassis vibration test frame includes a mounting frame and a clamping frame, and the mounting frame includes a bottom plate and a A vertical plate installed on the bottom plate, a rotating shaft is installed on the vertical plate through a bearing, and the two shaft ends of the rotating shaft respectively protrude out of the left and right end faces of the vertical plate; the clamping frame is on one side of the vertical plate Installed on the corresponding shaft end of the rotating shaft; a ratchet mechanism is installed between the other shaft end of the rotating shaft and the corresponding end face of the vertical plate, and the end face of the vertical plate is provided with a restricting ratchet mechanism to drive the clamping frame to rotate in the forward direction Angle limit mechanism.

One structure of the limiting mechanism includes a limiting rod that is penetrated on the corresponding shaft end of the rotating shaft. Within the rotation range of the left and right rod bodies of the limiting rod, a plurality of groups of uniform circumferences are provided on the corresponding end faces of the vertical plate. In addition, there are two opposite threaded holes in the shaft centers, and limit screws for blocking the forward rotation of the corresponding rod body are screwed into the two opposite threaded holes.

One structure of the ratchet mechanism includes a ratchet wheel and a pawl, the ratchet wheel is installed on the corresponding shaft end of the rotating shaft, the pawl is rotatably installed on the corresponding end surface of the vertical plate, and the pawl is on the corresponding end surface of the vertical plate. The installed shrapnel engages with the ratchet teeth of the ratchet to prevent the reverse rotation of the ratchet.

One structure of the clamping frame includes a base plate installed on the corresponding shaft end of the rotating shaft, a support plate is installed at the bottom of the base plate, a left side plate and a right side plate are respectively installed on the left and right sides of the base plate, and the The support plate, the left side plate and the right side plate constitute the frame body of the electronic equipment chassis in place, one side of the frame body is provided with a pressure plate, and the pressure plate is screwed with at least two upper and lower positioning screws, each positioning screw It is slidably installed in the sliding sleeve on the corresponding side plate, and the side plate is screwed with at least two upper and lower pressing screws acting on the pressing plate; Next two strips.

Adopt the method of the present invention to carry out the multi-angle impact vibration test on the electronic equipment chassis, and the scheme steps of its operation are as follows:

1. Place the electronic equipment chassis in the frame of the clamping frame, tighten the compression screws on one side panel and push the pressure plate to press the electronic equipment chassis on the other side panel.

2. Install the upper and lower pressure strips on the left and right side panels and fix the electronic equipment chassis at the front and back.

3. Rotate the limit rod in the forward direction to rotate the clamping frame and the electronic equipment chassis to the required anti-vibration angle, and screw the limit screw into the corresponding set of threaded holes to limit the position of the limit rod to prevent the limit Forward rotation of the bit rod.

4. Install the bottom plate on the vibration test bench to conduct the impact test of the electronic equipment chassis.

5. After the test is completed, unscrew the limit screw, turn the limit rod in the forward direction to rotate the clamping frame and the electronic equipment case by 180°, and screw the upper limit screw into another set of corresponding threaded holes to carry out another electronic equipment case. Shock testing in orthogonal directions.

Beneficial effects of the present invention:

1. In the structure of the present invention, a mechanism for manually pressing the electronic equipment case can be used to adjust the pushing distance of the pressing block, with strong adaptability, and the electronic equipment case is easy to install. Compared with the electric pressing mechanism using a motor, it is more suitable for the actual impact test. condition.

2. In the structure of the present invention, the clamping frame can be rotated at multiple angles, which can realize impact tests in different directions without disassembling and assembling the electronic equipment chassis.

Description of drawings

FIG. 1 is an axonometric view of an embodiment of the present invention.

FIG. 2 is a rear view of the embodiment of FIG. 1 .

FIG. 3 is a partial view from the direction A in FIG. 1 .

FIG. 4 is a schematic structural diagram of the ratchet mechanism and the limiting mechanism in FIG. 1 .

FIG. 5 is an axonometric view of the rail-mounted sub-box used in the embodiment of FIG. 1 .

Drawing number identification: 1. Bottom plate; 2. Vertical plate; 2-1 Handle hole; 3. Rotating shaft; 4. Ratchet mechanism; 4-1, Ratchet; 4-2, Pawl; 4-3, Shrapnel; 5, Limiting mechanism; 5-1, limit rod; 5-2, threaded hole; 5-3, limit screw; 6, base plate; 7, support plate; 8, left side plate; 9, right side plate; 10, Pressing plate; 11. Positioning screw; 12. Pressing screw; 13. Pressing strip; 14. Rail-mounting box; 14-1.

Detailed ways

The technical solutions of the present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

The present invention is particularly suitable for the clamping installation of a rail-mounted sub-box 14 (a type of electronic equipment chassis, belonging to a flat cuboid). The rail-mounted sub-box 14 is provided with guide rails 14 on the left and right box panels. -1, a plurality of connectors 14-2 are provided on the bottom plate of the rail-mounted sub-box 14, and mounting holes 14-3 are also provided on the left and right sides of the top plate of the rail-mounted sub-box 14, as shown in FIG. 5 .

The multi-angle impact vibration test fixture of the electronic equipment chassis of the present invention includes a chassis vibration test frame, and the chassis vibration test frame includes a mounting frame installed on the vibration test bench and a clamping frame installed on the installation frame.

The mounting frame includes a bottom plate 1 and a vertical plate 2, the vertical plate 2 is vertically arranged in the middle of the bottom plate 1, the vertical plate 2 is clamped by the left and right position splints 15, and the left and right splints 15 are used on the bottom plate 1. The screw is fixed and installed, the upper center of the vertical plate 2 is provided with a handle hole 2-1, the middle of the vertical plate 2 is installed with a rotating shaft 3 that penetrates the plate body through a bearing, and a clamping frame is installed on the front end of the rotating shaft 3. A ratchet mechanism 4 is installed between the rear shaft end of the rotating shaft 3 and the rear end surface of the vertical plate 2, and a limit mechanism 5 is arranged on the rear end surface of the vertical plate 2, and the limit mechanism 5 restricts the ratchet mechanism 4 to drive the clamping frame. The angle of forward rotation is shown in Figure 1 and Figure 2.

The main body of the clamping frame is the base plate 6, the base plate 6 is installed on the front shaft end of the rotating shaft 3 and is attached to the front end surface of the vertical plate 2, the bottom of the front end surface of the base plate 6 is installed with a supporting plate 7, and the front end of the base plate 6 is installed. The left and right side parts of the surface are respectively installed with a left side plate 8 and a right side plate 9. The support plate 7, the left side plate 8 and the right side plate 9 constitute a frame for placing the rail-mounted socket 14. The support plate 7 The upper part is provided with an escape hole for avoiding each connector 14-2, the right side of the frame is provided with a vertical pressing plate 10, and the upper, middle and lower sliding sleeves on the right side plate 9 all slide in The positioning screws 11 screwed together with the pressing plate 10 are installed, and the upper, middle and lower pressing screws 12 which can act on the pressing plate 10 are also screwed on the right side plate 9. Push the pressing plate 10 to the left, and each pressing screw 12 is sleeved with a spring pressed on the right side plate 9 to prevent the pressing screw 12 from loosening. The end faces of the left side plate 8 and the right side plate 9 pass the screws Two upper and lower pressing strips 13 are installed, as shown in Figure 1, Figure 2, and Figure 3.

The ratchet mechanism 4 includes a ratchet 4-1 and a ratchet 4-2. The ratchet 4-1 is mounted on the rear end of the rotating shaft 3 and is attached to the rear end surface of the vertical plate 2. The ratchet 4-2 It is rotatably installed on the rear end surface of the vertical plate 2 and is on the side above the ratchet wheel 4-1. The teeth are engaged, so that the ratchet 4-1 can only rotate in the forward direction (the clockwise direction of the arrow in the figure), as shown in Figures 1 and 4.

The limit mechanism 5 includes a limit rod 5-1 installed through the rotating shaft 3. The limit rod 5-1 can follow the rotation of the rotating shaft 3 and rotate synchronously with the ratchet 4-1. Within the rotation range of the right rod body, there are four groups of threaded holes 5-2 that are evenly distributed around the circumference and are opposite to each other with the shaft center on the rear end surface of the vertical plate 2. Together with the limit screw 5-3, the limit screw 5-3 can block the forward rotation of the corresponding rod body and limit the rotation position of the limit rod 5-1, that is, the ratchet 4-1, as shown in Figure 1 and Figure 4 Show.

Adopt the present invention to carry out the multi-angle impact vibration test to the guide rail installation type sub-box 14, and the scheme steps of its operation are as follows:

1. Place the rail-mounted sub-box 14 in the frame of the clamping frame, the bottom plate of the rail-mounted sub-box 14 is located on the pallet 7, and the left and right box plates of the rail-mounted sub-box 14 are placed on the left side Between the plate 8 and the right plate 9, tighten the pressing screw 12 on the right plate 9 to push the pressing plate 10 to press the rail-mounted sub-box 14 on the left plate 8, and the left plate 8 is provided with an escapement. The groove of the left guide rail 14-1 and the width of the pressing plate 10 can avoid the right guide rail 14-1.

2. Install the upper and lower pressure strips 13 on the left side panel 8 and the right side panel 9 and fix the position of the rail-mounted sub-box 14 at the front and rear.

3. Rotate the limit rod 5-1 in the positive direction and drive the guide rail-mounted insert box 14 to rotate to the anti-vibration angle that needs to be detected through the clamping frame, and screw the limit screws 5-3 into the corresponding pair of opposite threads. The position of the limit rod 5-1 is restricted and the forward rotation of the limit rod 5-1 is prevented.

4. Install the bottom plate 1 on the vibration test bench by lifting the vertical plate 2, and then the impact test can be performed on the rail-mounted sub-box 14.

5. After the test is completed, unscrew the limit screw 5-3, turn the limit rod 5-1 in the positive direction, and rotate the guide rail-mounted insert box 14 by 180° through the clamping frame. The upper limit screw 5-3 is screwed in the hole 5-2, so that the impact test in another orthogonal direction of the rail-mounted sub-box 14 can be performed.

The above embodiments are only specific examples for further detailed description of the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the scope of the disclosure of the present invention are included within the protection scope of the present invention.

Claims (5)

1. Electronic equipment chassis multi-angle impact vibration test fixture, including chassis vibration test frame, it is characterized in that: described chassis vibration test frame includes mounting frame and clamping frame, and described mounting frame comprises base plate (1) and is installed on base plate ( 1) The vertical plate (2) on the vertical plate (2), the rotating shaft (3) is installed on the vertical plate (2) through the bearing, and the two shaft ends of the rotating shaft (3) respectively protrude from the left and right ends of the vertical plate (2). out-of-plane; the clamping frame is installed on one side of the vertical plate (2) on the shaft end of the corresponding rotating shaft (3); the other shaft end of the rotating shaft (3) and the corresponding end face of the vertical plate (2) A ratchet mechanism (4) is installed between the vertical plates (2), and a limiting mechanism (5) is arranged on the end face of the vertical plate (2) to limit the ratchet mechanism (4) to drive the positive rotation angle of the clamping frame. 2. The multi-angle shock and vibration test fixture of an electronic equipment chassis according to claim 1, wherein the limit mechanism (5) comprises a limit rod (5- 1), within the rotation range of the left and right rod bodies of the limit rod (5-1), on the corresponding end face of the vertical plate (2), there are a plurality of sets of threaded holes (5) which are evenly distributed around the circumference and opposite to each other with the shaft center. -2), limit screws (5-3) for blocking the forward rotation of the corresponding rod body are screwed into the opposite threaded holes (5-2). 3. The multi-angle impact vibration test fixture of an electronic equipment chassis according to claim 1, wherein the ratchet mechanism (4) comprises a ratchet (4-1) and a ratchet (4-2), and the ratchet (4-2) 4-1) Installed on the corresponding shaft end of the rotating shaft (3), the pawl (4-2) is rotatably installed on the corresponding end face of the vertical plate (2), and the pawl (4-2) is on the vertical plate. (2) Under the action of the elastic piece (4-3) installed on the corresponding end surface, it engages with the ratchet teeth of the ratchet wheel (4-1) to prevent the reverse rotation of the ratchet wheel (4-1). 4. The multi-angle shock and vibration test fixture for an electronic equipment chassis according to any one of claims 1 to 3, wherein the clamping frame comprises a base plate (6) mounted on the corresponding shaft end of the rotating shaft (3). A support plate (7) is installed at the bottom of the base plate (6), a left side plate (8) and a right side plate (9) are respectively installed on the left and right sides of the base plate (6), and the support plate (7) ) and the left side plate (8) and the right side plate (9) form the frame body of the electronic equipment case in place, one side of the frame body is provided with a pressure plate (10), and at least a pressure plate (10) is screwed on the pressure plate (10). There are two upper and lower positioning screws (11). Each positioning screw (11) is slidably installed in the sliding sleeve on the corresponding side plate. Press the screws (12); at least two upper and lower pressing bars (13) are installed between the left side plate (8) and the right side plate (9) through the screws. 5. The electronic equipment chassis multi-angle impact vibration test method is characterized in that the electronic equipment chassis multi-angle impact vibration test fixture as claimed in claim 4 is adopted, and the scheme steps of its operation are: ①. Place the electronic equipment chassis in the frame of the clamping frame, tighten the compression screw (12) on one side plate and push the pressure plate (10) to press the electronic equipment chassis on the other side plate; ②. Install the upper and lower pressure strips (13) on the left side panel (8) and the right side panel (9) and fix the electronic equipment chassis at the front and back; ③. Rotate the limit rod (5-1) in the forward direction to rotate the clamping frame and the electronic equipment case to the required anti-vibration angle, and screw the limit screw (5-3) into the corresponding set of threaded holes (5- 2) and limit the position of the limit rod (5-1) to prevent the limit rod (5-1) from rotating forward; ④. Install the bottom plate (1) on the vibration test bench to conduct the impact test of the electronic equipment chassis; ⑤. After the test is completed, unscrew the limit screw (5-3), turn the limit rod (5-1) in the positive direction to rotate the clamping frame and the electronic equipment case by 180°, and screw the upper limit screw (5-3) to the The impact test in another orthogonal direction of the electronic equipment chassis is carried out in another group of corresponding threaded holes (5-2).

Images