CN216815941U

CN216815941U - Multi-angle impact vibration test fixture for electronic equipment case

Info

Publication number: CN216815941U
Application number: CN202220004691.2U
Authority: CN
Inventors: 陶鲭驰; 李虔华; 韦海波; 梁增柱; 陆宣博; 刘霄海
Original assignee: CETC 34 Research Institute
Current assignee: CETC 34 Research Institute
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-24
Anticipated expiration: 2032-01-04

Abstract

The utility model discloses a multi-angle impact vibration test fixture for a chassis of electronic equipment, which comprises a chassis vibration test frame, wherein the chassis vibration test frame comprises a mounting frame and a clamping frame, the mounting frame comprises a bottom plate and a vertical plate arranged on the bottom plate, a rotating shaft is arranged on the vertical plate through a bearing, and two shaft ends of the rotating shaft respectively extend out of the left end surface and the right end surface of the vertical plate; the clamping frame is arranged on the corresponding rotating shaft end at one side of the vertical plate; and a ratchet mechanism is arranged between the other shaft end of the rotating shaft and the corresponding end surface of the vertical plate, and a limiting mechanism for limiting the ratchet mechanism to drive the clamping frame to rotate in the forward direction is arranged on the end surface of the vertical plate. The mechanism for manually pressing the electronic equipment case is adopted, the pushing distance of the pressing block can be adjusted, and the adaptability is strong; the clamping frame can rotate at multiple angles, and impact tests in different directions can be performed under the condition that the electronic equipment case is not disassembled and assembled.

Description

Multi-angle impact vibration test fixture for electronic equipment case

Technical Field

The utility model relates to an electronic equipment shock resistance test, in particular to a multi-angle shock resistance test clamp for an electronic equipment case.

Background

In the service process of the electronic equipment, the equipment is damaged by instantaneous impact shock, so that whether the functions and the service performance of the electronic equipment meet requirements or not, whether the structure of the electronic equipment generates residual deformation, cracks and other mechanical damages or not and the like under an expected impact environment condition need to be examined.

According to the requirements of the relevant test standards of impact vibration of the electronic equipment, the electronic equipment is required to be impacted for times specified by relevant specifications along 6 axial directions of 3 orthogonal axes. However, the top of the impact vibration test stand commonly used in the market is a horizontal plane, and the top cannot rotate, while electronic equipment is mostly a flat square box, and can only impact the equipment in the upper and lower axial directions without a clamp, and cannot impact the equipment in the front and rear axial directions and the left and right axial directions. Therefore, a fixture for vertically placing and fixing the electronic equipment needs to be designed to assist in testing the impact and vibration resistance of the front and rear shafts and the left and right shafts of the electronic equipment.

At present, the structural forms of the electronic equipment case clamp mainly comprise an L shape, an inverted T shape and a box shape, but most of the electronic equipment case clamps only can clamp equipment in a one-way mode, and cannot apply restraint in other directions or conveniently adjust an impact vibration angle.

For example, the utility model discloses a "anchor clamps on falling ball impact tester" utility model patent with grant number CN204740175U, disclosed a anchor clamps with extrusion device, extrusion device mainly includes push rod, spring and fixed plate, relies on the elasticity of spring to press from both sides tight test article, and the packing force is less, is not suitable for the tight of the clamp of the great electronic equipment machine case of dead weight in impact vibration test.

For example, the utility model patent of "a drop hammer type multi-angle impact fixture with stable impact position" with application number CN110658059A discloses a drop hammer type multi-angle impact fixture with stable impact position, wherein the rotating frame is of a special-shaped structure and is not easy to machine and form.

For example, the utility model discloses a "anchor clamps for vibrations and impact test" utility model patent with grant number CN208921386U, a 90 rotatory anchor clamps is disclosed, the anchor clamps structure is fairly simple, but does not have part clamping device, and only be applicable to the quick-witted case that can directly install on the riser.

The structure of each of the above patent applications is not directly fixed to the vertical plate for the electronic device case, and therefore, no suitable clamp is temporarily available.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide an impact vibration test fixture capable of clamping a chassis of an electronic device in multiple angles.

The multi-angle impact vibration test fixture for the electronic equipment chassis comprises a chassis vibration test frame, wherein the chassis vibration test frame comprises a mounting frame and a clamping frame, the mounting frame comprises a bottom plate and a vertical plate arranged on the bottom plate, a rotating shaft is arranged on the vertical plate through a bearing, and two shaft ends of the rotating shaft respectively extend out of the left end surface and the right end surface of the vertical plate; the clamping frame is arranged on the corresponding rotating shaft end at one side of the vertical plate; and a ratchet mechanism is arranged between the other shaft end of the rotating shaft and the corresponding end surface of the vertical plate, and a limiting mechanism for limiting the ratchet mechanism to drive the clamping frame to rotate in the forward direction is arranged on the end surface of the vertical plate.

One structure of the limiting mechanism comprises a limiting rod which is arranged on the corresponding shaft end of the rotating shaft in a penetrating mode, a plurality of groups of threaded holes which are uniformly distributed on the corresponding end faces of the vertical plates and are opposite to each other in terms of the axis are formed in the rotating range of the left and right rod bodies of the limiting rod, and limiting screws which block the corresponding rod bodies to rotate in the forward direction are screwed in the opposite threaded holes.

One structure of the ratchet mechanism comprises a ratchet wheel and a pawl, the ratchet wheel is arranged at the corresponding shaft end of the rotating shaft, the pawl is rotatably arranged on the corresponding end surface of the vertical plate, and the pawl is meshed with the ratchet of the ratchet wheel under the action of an elastic sheet arranged on the corresponding end surface of the vertical plate to prevent the reverse rotation of the ratchet wheel.

One structure of the clamping frame comprises a base plate arranged on the corresponding shaft end of the rotating shaft, a supporting plate is arranged at the bottom of the base plate, a left side plate and a right side plate are respectively arranged on the left side and the right side of the base plate, the supporting plate, the left side plate and the right side plate form a frame body of the in-place electronic equipment case, a pressing plate is arranged on one side in the frame body, at least an upper positioning screw and a lower positioning screw are screwed on the pressing plate, each positioning screw is slidably arranged in a sliding sleeve on the corresponding side plate, and at least an upper compression screw and a lower compression screw which act on the pressing plate are screwed on the side plate; an upper pressing strip and a lower pressing strip are at least arranged between the left side plate and the right side plate through screws.

The utility model has the beneficial effects that:

1. in the structure of the utility model, the mechanism for manually pressing the electronic equipment case is adopted, the pushing distance of the pressing block can be adjusted, the adaptability is strong, the electronic equipment case is easy to install, and the mechanism can be more suitable for the actual conditions of an impact test compared with an electric pressing mechanism adopting a motor.

2. In the structure of the utility model, the clamping frame can rotate at multiple angles, and impact tests in different directions can be carried out under the condition of not dismounting the electronic equipment case.

Drawings

FIG. 1 is an isometric view of one embodiment of the present invention.

Fig. 2 is a rear view of the embodiment of fig. 1.

Fig. 3 is a partial view taken along the line a in fig. 1.

Fig. 4 is a schematic structural view of the ratchet mechanism and the limiting mechanism in fig. 1.

Fig. 5 is an isometric view of a rail-mounted subrack for use with the embodiment of fig. 1.

And (3) identifying the figure number: 1. a base plate; 2. a vertical plate; 2-1 handle hole; 3. a rotating shaft; 4. a ratchet mechanism; 4-1, ratchet; 4-2, pawl; 4-3, a spring plate; 5. a limiting mechanism; 5-1, a limiting rod; 5-2, a threaded hole; 5-3, a limit screw; 6. a substrate; 7. a support plate; 8. a left side plate; 9. a right side plate; 10. pressing a plate; 11. a set screw; 12. a compression screw; 13. layering; 14. a rail-mounted subrack; 14-1, guide rails; 14-2, a connector; 14-3, mounting holes; 15. and (4) clamping the plate.

Detailed Description

The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.

The utility model is particularly suitable for clamping and mounting a guide rail mounting type plug box 14 (one type of electronic equipment chassis, belonging to a flat cuboid), wherein guide rails 14-1 are respectively arranged on the left box plate and the right box plate of the guide rail mounting type plug box 14, a plurality of connectors 14-2 are arranged on the bottom plate of the guide rail mounting type plug box 14, and mounting holes 14-3 are also arranged on the left side and the right side of the top plate of the guide rail mounting type plug box 14, as shown in figure 5.

The multi-angle impact vibration test fixture for the electronic equipment case comprises a case vibration test frame, wherein the case vibration test frame comprises a mounting frame arranged on a vibration test table and a clamping frame arranged on the mounting frame.

The mounting bracket comprises a bottom plate 1 and a vertical plate 2, the vertical plate 2 is perpendicularly arranged at the middle part of the bottom plate 1, the vertical plate 2 is clamped by a clamping plate 15 at a left position and a right position, the left clamping plate 15 and the right clamping plate 15 are fixedly arranged on the bottom plate 1 through screws, a handle hole 2-1 is formed in the upper center of the vertical plate 2, a rotating shaft 3 penetrating through a plate body is arranged at the middle part of the vertical plate 2 through a bearing, a clamping frame is arranged at the front shaft end of the rotating shaft 3, a ratchet mechanism 4 is arranged between the rear shaft end of the rotating shaft 3 and the rear end face of the vertical plate 2, a limiting mechanism 5 is arranged on the rear end face of the vertical plate 2, and the limiting mechanism 5 limits the ratchet mechanism 4 to drive the forward rotating angle of the clamping frame, as shown in fig. 1 and fig. 2.

The main body of the clamping frame is a base plate 6, the base plate 6 is arranged at the front shaft end of the rotating shaft 3 and is attached to the front end face of the vertical plate 2, a supporting plate 7 is arranged at the bottom of the front end face of the base plate 6, a left side plate 8 and a right side plate 9 are respectively arranged at the left side and the right side of the front end face of the base plate 6, the supporting plate 7, the left side plate 8 and the right side plate 9 form a frame body for placing a guide rail installation type inserting box 14, a yielding hole for avoiding each connector 14-2 is formed in the supporting plate 7, a vertical pressing plate 10 is arranged at the right side in the frame body, positioning screws 11 screwed with the pressing plate 10 are respectively arranged in an upper sliding sleeve, a middle sliding sleeve and a lower sliding sleeve on the right side plate 9 in a sliding manner, an upper pressing screw 12, a middle pressing screw 12 and a lower pressing screw 12 which can act on the pressing plate 10 are screwed in a manner, the three pressing screws 12 can push the pressing plate 10 leftwards in a screwing manner, springs on the right side plate 9 are sleeved to prevent the pressing screws 12 from loosening, the end surfaces of the left side plate 8 and the right side plate 9 are provided with an upper pressing bar 13 and a lower pressing bar 13 through screws, as shown in fig. 1, 2 and 3.

The ratchet mechanism 4 comprises a ratchet wheel 4-1 and a pawl 4-2, the ratchet wheel 4-1 is mounted at the rear shaft end of the rotating shaft 3 and attached to the rear end face of the vertical plate 2, the pawl 4-2 is rotatably mounted on the rear end face of the vertical plate 2 and located on one side above the ratchet wheel 4-1, and the pawl 4-2 is meshed with a ratchet of the ratchet wheel 4-1 under the action of an elastic sheet 4-3 mounted on the rear end face of the vertical plate 2, so that the ratchet wheel 4-1 can only rotate in the forward direction (clockwise direction of an arrow in the figure), as shown in figures 1 and 4.

The limiting mechanism 5 comprises a limiting rod 5-1 which penetrates through the rotating shaft 3, the limiting rod 5-1 can rotate along with the rotating shaft 3 and synchronously rotate with the ratchet wheel 4-1, four groups of threaded holes 5-2 which are uniformly distributed on the circumference and are opposite to each other in pairs along the axis are formed in the rear end face of the vertical plate 2 in the rotating range of the left rod body and the right rod body of the limiting rod 5-1, limiting screws 5-3 are screwed in the groups of threaded holes 5-2 which are opposite to each other in pairs, and the limiting screws 5-3 can block the forward rotation of the corresponding rod bodies to limit the rotating position of the limiting rod 5-1, namely the ratchet wheel 4-1, as shown in figures 1 and 4.

The utility model is adopted to carry out multi-angle impact vibration test on the guide rail installation type plug-in box 14, and the operation scheme comprises the following steps:

1. the guide rail installation type inserting box 14 is arranged in a frame body of a clamping frame, a bottom plate of the guide rail installation type inserting box 14 is located on a supporting plate 7, a left box plate and a right box plate of the guide rail installation type inserting box 14 are arranged between a left side plate 8 and a right side plate 9, a compression screw 12 on the right side plate 9 is screwed to push a pressure plate 10 to compress the guide rail installation type inserting box 14 on the left side plate 8, a groove avoiding the left guide rail 14-1 is formed in the left side plate 8, and the width of the pressure plate 10 is designed to be capable of avoiding the right guide rail 14-1.

2. The upper and lower pressing bars 13 are mounted on the left and

right side plates

8 and 9, and the positions of the guide rail mounting type plug boxes 14 are fixed front and back.

3. The limiting rod 5-1 is rotated forwards, the guide rail installation type inserting box 14 is driven to rotate to a shock-proof angle required to be detected through the clamping frame, and the limiting screws 5-3 are screwed into a group of corresponding threaded holes 5-2 which are opposite in pairs to limit the position of the limiting rod 5-1 so as to prevent the limiting rod 5-1 from rotating forwards.

4. The base plate 1 is mounted on the vibration test stand by lifting the riser 2, and then the rail-mounted type box 14 can be subjected to an impact test.

5. After the test is finished, the limiting screws 5-3 are unscrewed, the limiting rods 5-1 are rotated in the forward direction, the guide rail installation type plug box 14 is rotated by 180 degrees through the clamping frame, the limiting screws 5-3 are screwed in the corresponding other group of threaded holes 5-2 which are opposite in pairs, and then the impact test in the other orthogonal direction of the guide rail installation type plug box 14 can be carried out.

The above-described embodiments are only specific examples for further explaining the object, technical solution and advantageous effects of the present invention in detail, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement and the like made within the scope of the present disclosure are included in the protection scope of the present invention.

Claims

1. Electronic equipment machine case multi-angle impact vibration test anchor clamps, including quick-witted case vibrations test jig, its characterized in that: the chassis vibration testing frame comprises a mounting frame and a clamping frame, the mounting frame comprises a bottom plate (1) and a vertical plate (2) arranged on the bottom plate (1), a rotating shaft (3) is arranged on the vertical plate (2) through a bearing, and two shaft ends of the rotating shaft (3) respectively extend out of the left end surface and the right end surface of the vertical plate (2); the clamping frame is arranged on the shaft end of the corresponding rotating shaft (3) at one side of the vertical plate (2); ratchet (4) are installed between another axle head of pivot (3) and the corresponding terminal surface of riser (2), be equipped with limiting ratchet (4) on this terminal surface of riser (2) and drive clamping frame forward turned angle's stop gear (5).

2. The multi-angle impact shock test fixture for electronic equipment cabinets of claim 1, wherein: the limiting mechanism (5) comprises a limiting rod (5-1) which penetrates through the corresponding shaft end of the rotating shaft (3), a plurality of groups of threaded holes (5-2) which are uniformly distributed in the circumference and are opposite to each other in two directions by the axis are formed in the corresponding end surface of the vertical plate (2) in the rotating range of the left and right rod bodies of the limiting rod (5-1), and limiting screws (5-3) which block the corresponding rod bodies from rotating in the forward direction are screwed in the opposite threaded holes (5-2).

3. The multi-angle impact shock test fixture for electronic equipment cabinets of claim 1, wherein: the ratchet mechanism (4) comprises a ratchet wheel (4-1) and a pawl (4-2), the ratchet wheel (4-1) is 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 meshed with the ratchet of the ratchet wheel (4-1) under the action of an elastic sheet (4-3) installed on the corresponding end face of the vertical plate (2) to prevent the reverse rotation of the ratchet wheel (4-1).

4. The multi-angle impact shock test fixture for the electronic equipment chassis according to any one of claims 1 to 3, characterized in that: the clamping frame comprises a base plate (6) arranged on the corresponding shaft end of the rotating shaft (3), a supporting plate (7) is arranged at the bottom of the base plate (6), a left side plate (8) and a right side plate (9) are respectively arranged on the left side and the right side of the base plate (6), the supporting plate (7), the left side plate (8) and the right side plate (9) form a frame body of the in-place electronic equipment case, a pressing plate (10) is arranged on one side in the frame body, at least an upper positioning screw (11) and a lower positioning screw (11) are screwed on the pressing plate (10), each positioning screw (11) is slidably arranged in a sliding sleeve on the corresponding side plate, and at least an upper compression screw (12) and a lower compression screw (12) acting on the pressing plate (10) are screwed on the side plate; at least an upper pressing strip and a lower pressing strip (13) are arranged between the left side plate (8) and the right side plate (9) through screws.