CN210741800U

CN210741800U - Stepped impact clamp

Info

Publication number: CN210741800U
Application number: CN201921731360.3U
Authority: CN
Inventors: 李丽; 朱剑凯
Original assignee: Hongkang Technology Testing Shanghai Co Ltd
Current assignee: Hongkang Technology Testing Shanghai Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-12
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to a cascaded impact fixture, including base and a plurality of sliding plate, degressive first step groove of basal area and second step groove and impact groove have been seted up in proper order along its degree of depth direction on the surface of base. The sliding plates are symmetrically arranged on the surface, far away from the impact groove, of the base in a sliding mode, and after the sliding plates slide close to the center of the first stepped groove, the PCB is abutted to the groove bottom of the first stepped groove. Before the PCB impact test is carried out, the PCB is placed into the matched stepped groove according to different sizes of the PCB. After placing the PCB board in first step inslot, slide the sliding plate to the center that is close to first step groove for the tank bottom in PCB board and first step groove supports tightly, has fixed the PCB board on the one hand, and broken PCB board pops out in follow anchor clamps when on the other hand prevents to strike. The PCB board that the size is littleer can be put into in the second ladder groove, and the PCB board of equidimension and thickness can be put into to the ladder groove of equidimension not, has solved the poor problem of impact fixture commonality.

Description

Stepped impact clamp

Technical Field

The utility model belongs to the technical field of PCB board impact test anchor clamps technique and specifically relates to a cascaded impact clamp is related to.

Background

A PCB is an important electronic component, not only a support for electronic components, but also a provider of electrical connections for electronic components, and is called a "printed" circuit board because it is manufactured by electronic printing.

In the production process of the PCB, various inspection tests are required to be performed on the PCB in order to verify the quality of the PCB. When the vibration and impact test is performed on the PCB, the PCB needs to be fixed on the corresponding jig. The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig. At present, the fixing clamp of the PCB is supported by an aluminum plate or a template, the rigidity of the fixing clamp is poor, and the response value in the test is greatly influenced by the installation level of an installer.

The existing impact clamp is used for clamping and fixing a PCB when the PCB is impacted, and the existing common impact clamp is designed and used by matching a single PCB, namely, the existing common impact clamp can only be used for the impact clamp with one size specification. Because the size of the board-level impact PCB provided by a customer is large, clamps with various sizes are required to be manufactured for testing. The material has not only been wasted in the anchor clamps of preparation multiple not unidimensional, will change anchor clamps according to the PCB board of not unidimensional in addition when experimental, then carries out impact test again, and the process is comparatively loaded down with trivial details, takes trouble and laboursome. Therefore, the problem of poor versatility of the impact clamp is to be solved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a cascaded impact clamp, it has the better advantage of commonality.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a stepped impact clamp comprises a base and a plurality of sliding plates, wherein a first stepped groove, a second stepped groove and an impact groove with gradually reduced bottom areas are sequentially formed in the surface of the base along the depth direction of the base;

the sliding plates are symmetrically and slidably arranged on one surface of the base, which is far away from the impact groove;

and after the sliding plate slides close to the center of the first stepped groove, the PCB is abutted against the groove bottom of the first stepped groove.

Through the technical scheme, before the PCB impact test is carried out, the PCB is placed into the matched stepped groove according to two different sizes of the PCB. The impact groove forms the impact cavity for the PCB impact test on the one hand, and on the other hand, the PCB which is broken after impact is taken out from the stepped groove conveniently. After placing the PCB board in first step inslot, slide the sliding plate to the center that is close to first step groove for the PCB board supports tightly with the tank bottom in first step groove, has fixed the PCB board on the one hand, and on the other hand prevents to pop out in the anchor clamps when the PCB board is strikeed. The PCB board that fixed dimension is littleer can be placed to the second step groove, and the sliding plate that slides makes it continue to slide to the center in first step groove, pops out from the anchor clamps when can prevent the PCB board by the impact equally, has solved the poor problem of impact fixture commonality.

The utility model discloses further set up to: and the joint of the second stepped groove and the bottom surface of the first stepped groove is provided with thin pressure grooves, and the thin pressure grooves are symmetrically arranged along the central axis of the impact groove.

And an excircle corner is arranged at the joint of the second stepped groove and the impact groove and on the edge of the thin pressure groove.

Through above-mentioned technical scheme, thin indent is convenient for place thinner chip, and the bullnose makes the PCB board insert the ladder inslot easily on the one hand, and on the other hand has removed sharp limit protection operator's hand and has not been cut by sharp limit.

The utility model discloses further set up to: and fillets are arranged at the ends, far away from the edges, of the first stepped groove, the second stepped groove and the thin pressure groove.

Through above-mentioned technical scheme, the fillet has increased the guidance quality when the PCB board is inserted on the one hand, and on the other hand is when assaulting the PCB board, the release of the stress of being convenient for is difficult for making anchor clamps crackle to appear.

The utility model discloses further set up to: one end of one sliding plate along the length direction is provided with a sliding groove, a driving shaft is connected in the sliding groove in a transmission mode, and the driving shaft penetrates through the sliding groove to be connected with the base in a rotating mode.

Through above-mentioned technical scheme, rotate the drive shaft and make the spout slide on the base for the PCB board of equidimension not can be put into to the ladder inslot. The sliding plate enables the PCB to be fixed in the impact fixture, and stability of the PCB during testing is improved.

The utility model discloses further set up to: the driving shaft is provided with a gear, the side wall of one end of the sliding chute is provided with a rack meshed with the gear, and the sliding chute is arranged along the width direction of the sliding plate.

Through the technical scheme, the mutual matching of the gear and the rack enables the rotary motion of the driving shaft to be changed into the linear motion of the sliding plates on the base, so that the positions of the two sliding plates on the base can be conveniently adjusted.

The utility model discloses further set up to: one end of one sliding plate, which is far away from the sliding groove, is provided with a through groove, a bolt is arranged in the through groove, and the bolt penetrates through the through groove and then is in threaded connection with the base;

the through groove and the sliding groove are arranged in parallel, an elastic gasket is arranged between the bolt and the sliding plate, and the diameter of the elastic gasket is larger than the width of the through groove;

and screwing the bolt to enable the elastic gasket to be elastically abutted against the sliding plate.

Through the technical scheme, the elastic gasket is elastically abutted against the sliding plate by screwing the bolt, so that the sliding plate is fixed on the base. Loosening the bolt leaves a gap between the elastic gasket and the sliding plate, and the through groove enables the sliding plate to move on the base relative to the bolt.

The utility model discloses further set up to: and one end of each of the two sliding plates, which is close to each other, is provided with a fixed plate, and the fixed plate is perpendicular to the sliding plates and is fixedly connected with the sliding plates in an integrated forming way.

Through above-mentioned technical scheme, the fixed plate makes the PCB board fixed at the ladder inslot on the one hand, and on the other hand prevents that the PCB board from popping out from anchor clamps because the fracture under the impact.

The utility model discloses further set up to: and chamfers are respectively arranged at one ends of the bases, which are close to the fixed plate.

Through the technical scheme, burrs on sharp edges of the base are removed through the chamfering, so that the jig is more attractive, and meanwhile, the chamfering is also convenient for assembling the sliding plate and the base.

To sum up, the utility model discloses a beneficial technological effect does:

1. through seting up the impact groove at the base center, set up a plurality of first step grooves and the second step groove that are used for placing not unidimensional on the lateral wall in impact groove, set up thin indent between first step groove and the second step groove for can put into the not PCB board of unidimensional and different thickness in the anchor clamps, solved the poor problem of impact fixture commonality.

2. Through set up fillet and bullnose on first step groove and second step groove and thin indent, make the PCB board place in anchor clamps more easily on the one hand, sharp limit and burr have been got rid of to on the other hand, have improved the security in the anchor clamps use.

3. A sliding groove is formed in the sliding plate, a rack is formed in one surface of the inner wall of the sliding groove, a driving shaft is arranged on the base, and a gear meshed with the rack is arranged on the driving shaft. Slide the sliding plate to the center that is close to first step groove for the tank bottom of PCB board and first step groove supports tightly, has fixed the PCB board on the one hand, and the PCB board pops out in following anchor clamps when on the other hand prevents to strike. The other end of the sliding plate is provided with a through groove, the base is provided with a bolt, and an elastic gasket is arranged between the bolt and the sliding plate. The bolt passes through the through groove and is in threaded connection with the base, and the bolt is screwed to enable the elastic gasket to be tightly abutted against the sliding plate, so that the sliding plate is fixed on the base.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of the present invention along the central axis of the two bolts coinciding with each other;

fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Reference numerals: 1. a base; 11. a first step groove; 12. a second stepped groove; 13. an impact groove; 131. a bullnose; 132. a fillet; 14. a thin pressing groove; 2. a sliding plate; 21. a chute; 211. a rack; 22. a through groove; 23. a fixing plate; 231. chamfering; 3. a drive shaft; 31. a gear; 4. a bolt; 41. an elastic pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a cascaded impact fixture, including base 1 and two sliding plates 2, base 1 is the cuboid form, and impact groove 13 has been seted up at the center of base 1. The sliding plates 2 are in the shape of a rectangular parallelepiped plate, and the two sliding plates 2 are arranged at two ends of the base 1 in a sliding manner with axial symmetry in the impact grooves 13. The sliding plates 2 are driven so that the sliding plates 2 approach each other to clamp the PCB panel placed between the sliding plates 2, thereby achieving the fixation of the PCB panel.

Base 1 is trapezoidal form along its length direction's section, has seted up first step groove 11 and second step groove 12 on two lateral walls of impact groove 13, and impact groove 13 forms PCB board level impact test's impact cavity on the one hand, and on the other hand is convenient for the tester to take out the PCB board from impact groove 13. Thin indent 14 has been seted up to first step groove 11 and second step groove 12 interconnect department, and thin indent 14 is the symmetry setting with 13 axis of impact groove. The first stepped groove 11, the second stepped groove 12 and the thin pressing groove 14 can be used for placing PCBs with different sizes and thicknesses, and the problem that the universality of the impact clamp is poor is solved.

Referring to fig. 4, the second stepped groove 12 is connected to the impact groove 13 and the edge of the thin pressing groove 14 is provided with a bullnose 131, on one hand, when the PCB placed in the stepped groove is impacted, the bullnose 131 protects the PCB from being pressed to a certain extent, and on the other hand, the sharp edge is removed to protect the hand of the operator from being cut by the sharp edge. First ladder groove 11 and second ladder groove 12 and thin indent 14 keep away from the one end at border and have seted up fillet 132 along its length direction, and fillet 132 is convenient for take out the PCB board after the experiment on the one hand, and on the other hand when assaulting the PCB board, the release of the stress of being convenient for is difficult for making anchor clamps crackle.

Referring to fig. 1 and 2, one end of one of the sliding plates 2 is provided with a kidney-shaped sliding slot 21 along a width direction thereof, one side of an inner wall of the sliding slot 21 along a length direction thereof is provided with a rack 211, the side opposite to the side provided with the rack 211 is a smooth side, and the sliding slot 21 penetrates through the sliding plate 2 and is symmetrically arranged with respect to a central axis of the impact slot 13. The base 1 is provided with a driving shaft 3, one end of the driving shaft 3 is fixedly connected with an inner hexagonal cylindrical head, and the outer circumferential surface of one end close to the cylindrical head is fixedly connected with a gear 31.

One end of the gear 31 is engaged with the rack 211, and the other end is spaced from the inner wall of the slide groove 21 by a small gap. The one end that the cylinder head was kept away from to drive shaft 3 passes spout 21 and is connected with the fixing base rotation, when rotating drive shaft 3 for sliding plate 2 is at fixing base length direction round trip movement, fixes the PCB board of placing between sliding plate 2 through adjusting the position of two sliding plates 2.

Referring to fig. 1 and 3, a waist-shaped through groove 22 parallel to the sliding groove 21 is formed in one end of one of the sliding plates 2 away from the sliding groove 21, a hexagon socket head cap screw 4 is arranged in the through groove 22, and the diameter of the hexagon socket head cap screw 4 is smaller than the width of the through groove 22. The fixing seat is provided with a threaded hole matched with the inner hexagon bolt 4, an elastic gasket 41 is arranged between the inner hexagon bolt 4 and the sliding plate 2, and the diameter of the elastic gasket 41 is larger than the width of the through groove 22.

The socket head cap screw 4 passes behind elastic gasket 41 and the logical groove 22 and threaded connection with the screw hole on the fixing base, when needing to fix sliding plate 2 on the fixing base, screws socket head cap screw 4 and makes elastic gasket 41 support tightly with sliding plate 2. When the position of the sliding plate 2 needs to be adjusted, the hexagon socket head cap screw 4 is unscrewed, so that a gap is left between the elastic gasket 41 and the bolt 4, and the sliding plate 2 can move on the fixed seat.

Referring to fig. 3, the sliding plate 2 is perpendicular fixedly connected with fixed plate 23 on the one side that is close to each other, the utility model discloses a tool that the metal was made can adopt the welded mode to connect fixed plate 23 on sliding plate 2. The fixing plate 23 is rectangular and has one end close to the first stepped groove 11, and the fixing plate 23 fixes the PCB board in the first stepped groove 11 and prevents the PCB board from popping out of the jig due to breakage under impact. One end of the base 1 close to the fixing plate 23 is respectively provided with a 45-degree chamfer 231, and the chamfer 231 is parallel to the length direction of the fixing plate 23 along the length direction. Chamfer 231 has got rid of the burr on the base 1 sharp edge on the one hand for the tool is more pleasing to the eye, and on the other hand is convenient for the assembly between sliding plate 2 and the base 1.

The implementation principle of the embodiment is as follows: and placing the fixed seat on a horizontal plane between PCB board-level impact tests. When a PCB with a smaller impact size is impacted, the PCB can be placed in the second stepped groove 12 and the thin pressing groove 14, and the PCB can be horizontally placed in the clamp according to the size and the thickness of the PCB. When a PCB with a larger size is impacted, the bolt 4 is unscrewed to leave a gap between the elastic gasket 41 and the bolt 4, and the sliding plate 2 can slide on the fixed seat.

The driving shaft 3 is rotated to enable the sliding plates 2 to move on the fixed seat, and the fixed plates 23 fixedly connected to one ends of the sliding plates 2 are close to each other by adjusting the positions between the two sliding plates 2, so that the PCB is fixed, and the PCB is guaranteed not to pop up when impacted. The first stepped groove 11, the second stepped groove 12 and the thin pressing groove 14 enable PCBs with different sizes and thicknesses to be placed in the clamp, and the problem that the universality of the impact clamp is poor is solved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A cascaded anchor clamps that strike which characterized in that: the sliding plate comprises a base (1) and a plurality of sliding plates (2), wherein a first step groove (11), a second step groove (12) and an impact groove (13) with gradually reduced bottom areas are sequentially formed in the surface of the base (1) along the depth direction of the base;

the sliding plates (2) are symmetrically and slidably arranged on one surface of the base (1) far away from the impact groove (13);

after the sliding plate (2) slides close to the center of the first stepped groove (11), the PCB is abutted against the groove bottom of the first stepped groove (11).

2. The stepped impact clamp of claim 1, wherein: the connecting part of the second stepped groove (12) and the bottom surface of the first stepped groove (11) is provided with a thin pressure groove (14), and the thin pressure groove (14) is symmetrically arranged along the central axis of the impact groove (13).

3. The stepped impact clamp of claim 2, wherein: and an excircle corner (131) is arranged at the joint of the second stepped groove (12) and the impact groove (13) and on the edge of the thin pressure groove (14).

4. The stepped impact clamp of claim 2, wherein: and one ends of the first stepped groove (11), the second stepped groove (12) and the thin pressing groove (14) far away from the edges are provided with fillets (132).

5. The stepped impact clamp of claim 1, wherein: one end of one of the sliding plates (2) in the length direction is provided with a sliding groove (21), a driving shaft (3) is connected in the sliding groove (21) in a transmission manner, and the driving shaft (3) penetrates through the sliding groove (21) to be rotatably connected with the base (1).

6. The stepped impact clamp of claim 5, wherein: the driving shaft (3) is provided with a gear (31), a side wall of one end of the sliding groove (21) is provided with a rack (211), and the sliding groove (21) is arranged along the width direction of the sliding plate (2).

7. The stepped impact clamp of claim 5, wherein: one end, far away from the sliding groove (21), of one sliding plate (2) is provided with a through groove (22), a bolt (4) is arranged in the through groove (22), and the bolt (4) penetrates through the through groove (22) and then is in threaded connection with the base (1);

the through groove (22) and the sliding groove (21) are arranged in parallel, an elastic gasket (41) is arranged between the bolt (4) and the sliding plate (2), and the diameter of the elastic gasket (41) is larger than the width of the through groove (22);

and screwing the bolt (4) to enable the elastic gasket (41) to be elastically abutted against the sliding plate (2).

8. The stepped impact clamp of claim 7, wherein: one end, close to each other, of each of the two sliding plates (2) is provided with a fixed plate (23), and the fixed plate (23) is perpendicular to the sliding plates (2) and is fixedly connected with the sliding plates (2) in an integrated forming mode.

9. The stepped impact clamp of claim 8, wherein: and chamfers (231) are respectively arranged at one ends of the bases (1) close to the fixing plates (23).