Small PCBA automatic testing machine

Abstract

The utility model discloses a small-sized PCBA automatic testing machine, which comprises a base and a testing main body, a double-thread screw is rotatably arranged on the base through a bearing seat, the double-thread screw is composed of two symmetrical thread sections with opposite thread directions, the two thread sections of the double-thread screw are in threaded connection with sliding blocks, and the sliding blocks are in threaded connection with the testing main body. The sliding blocks are provided with clamping plates through vertical frames, the clamping plates are rotationally connected with the vertical frames, the outer side of one vertical frame is provided with a first motor for driving the clamping plates to rotate, and the sliding blocks, the vertical frames and the clamping plates are symmetrically distributed about the vertical center line of the testing body. The two sliding blocks drive the two clamping plates to get close to each other or get away from each other through the vertical frame so as to clamp or loosen the PCBA. When the double-thread screw rotates, the sliding block and the vertical frame synchronously drive the two clamping plates to move in the opposite directions, the transverse distance between the two clamping plates can be adjusted according to the size requirement of an actual PCBA, and the limitation of the whole device in use is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PCBA detection, in particular to a small PCBA automatic testing machine. Background Art

[0002] PCBA refers to the entire process of a PCB blank board going through SMT mounting and then DIP plug-in, referred to as PCBA, which is also known as installed circuit board. After PCBA is installed, it needs to be tested.

[0003] The existing PCBA testing device is shown in the patent document with application number 202121636795.7, which discloses a universal PCBA automatic testing machine, including: a workbench, a gate-shaped mounting frame and a mounting plate arranged on the workbench, and a controller arranged on one side of the gate-shaped mounting frame. The workbench is provided with a clamping mechanism used to clamp the PCBA to be tested, a flipping assembly used to drive the clamping mechanism to flip, a test body used to test the PCBA, and a lifting cylinder used to drive the test body to rise or fall. The flipping assembly is installed on the workbench, and the lifting cylinder is installed on the gate-shaped mounting frame.

[0004] Although the device can realize face-changing detection by driving the PCBA to flip through the flip assembly, and the detection effect is better, the clamping mechanism and the flip assembly are fixed in position, resulting in a certain lateral spacing. It is not convenient to adjust the lateral spacing during use, and it is difficult to adapt to PCBAs of different widths, and there are certain limitations in use.

[0005] To this end, we propose a small PCBA automatic testing machine to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a small PCBA automatic testing machine to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A small PCBA automatic testing machine comprises a base and a test body, wherein a double-headed screw is rotatably mounted on the base via a bearing seat, the double-headed screw consists of two symmetrical threaded segments with opposite thread directions, and both threaded segments of the double-headed screw are threadedly connected with sliders, a clamping plate is mounted on the slider via a stand, the clamping plate is rotatably connected to the stand, and a motor for driving the clamping plate to rotate is mounted on the outer side of one of the stands, the slider, the stand and the clamping plate are symmetrically distributed about the vertical center line of the test body, and when the double-headed screw rotates, the two sliders drive the two clamping plates to approach or move away from each other via the stand to clamp or loosen the PCBA.

[0009] In a further embodiment, one end of the double-headed screw passing through one of the bearing seats is connected to the output shaft of motor 2.

[0010] In a further embodiment, a pressure sensor is embedded in the clamping plate, and a controller electrically connected to the pressure sensor is also provided on the base, and an output end of the controller is electrically connected to the second motor.

[0011] In a further embodiment, a polished rod is fixed between the two bearing seats, the polished rod and the double-headed screw are parallel to each other, and the slider is slidably connected to the polished rod.

[0012] In a further embodiment, opposite sides of the two clamping plates are connected with anti-slip layers.

[0013] In a further embodiment, the anti-slip layer is made of anti-slip silicone or anti-slip rubber.

[0014] In a further embodiment, a support platform is provided directly below the test body, and the support platform is installed on the base through a telescopic member.

[0015] In a further embodiment, the telescopic member may be an electric push rod, a pneumatic cylinder, or a hydraulic cylinder.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model is provided with a double-headed screw, a slider and a stand. When the double-headed screw rotates, the slider and the stand can synchronously drive the two clamping plates to move in opposite directions. Not only can the lateral spacing between the two clamping plates be adjusted according to the size requirements of the PCBA in actual use, and thus PCBAs of different sizes can be clamped, which effectively reduces the limitations of the entire device when used, but also the movement amount of the two clamping plates can be kept consistent, thereby improving the accuracy of positioning the PCBA after clamping, and the use is more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model after the test body and the support platform are removed;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model after the test main body is removed;

[0021] Figure 4 It is a schematic diagram of the semi-sectional structure of the splint of the utility model.

[0022] In the figure: 1. base; 2. test body; 3. bearing seat; 4. double-headed screw; 5. slider; 6. stand; 7. clamp; 8. motor 1; 9. motor 2; 10. bare rod; 11. telescopic part; 12. support platform; 13. anti-slip layer; 14. pressure sensor; 15. controller. Implementation

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1A small PCBA automatic testing machine includes a base 1, a test body 2 is installed on the rear end of the base 1 through an L-shaped vertical plate and a lifting cylinder, and the body of the lifting cylinder is fixed to the L-shaped vertical plate, and the output shaft of the lifting cylinder passes through the L-shaped vertical plate and is connected to the test body 2, so that the test body 2 is driven downward by the lifting cylinder to test the PCBA. Considering that the sizes of PCBAs are different during actual use, in order to limit PCBAs of different sizes, a pair of bearing seats 3 are fixed on the base 1, and a double-headed screw 4 is installed between the pair of bearing seats 3 by rotation, and the double-headed screw 4 consists of two symmetrical threaded segments with opposite thread directions, and the two screws of the double-headed screw 4 Slide blocks 5 are threadedly connected on the groove segments. The slide blocks 5 are symmetrically distributed about the vertical center line of the test body 2, so that when the double-headed screw 4 rotates, the two slide blocks 5 move in opposite directions and ensure that the movement amount on both sides is consistent. A stand 6 is fixed on the slide block 5, and a clamping plate 7 is rotatably installed on the inner side of the top end of the stand 6. A motor 8 is installed on the outer side of one of the stands 6. The main body of the motor 8 is fixed to the stand 6, and the output shaft of the motor 8 is connected to the clamping plate 7. The double-headed screw 4 rotates to drive the two clamping plates 7 to approach each other and clamp the PCBA, thereby limiting the PCBA. The motor 8 drives one of the clamping plates 7 to rotate, which can drive the PCBA and the other clamping plate 7 to rotate, thereby realizing the rotation and flipping of the PCBA.

[0027] See also Figure 2-4 In order to facilitate the automatic control of the rotation of the double-headed screw 4, one end of the double-headed screw 4 passing through one of the bearing seats 3 is connected to the output shaft of the motor 2 9, so that the motor 2 9 can drive the double-headed screw 4 to rotate electrically. At the same time, considering that when the clamp 7 clamps the PCBA, in order to prevent the PCBA from being over-deformed or under-extruded and falling off when turning over, a pressure sensor 14 is embedded in the clamp 7, and a controller 15 electrically connected to the pressure sensor 14 is also provided on the base 1. The output end of the controller 15 is electrically connected to the motor 2 9. Therefore, when the clamp 7 is close to the PCBA, the pressure sensor 14 can detect the pressure signal and transmit the signal to the controller 15. Then, when the pressure sensor 14 detects a certain pressure value, the controller 15 controls the motor 2 9 to stop working, thereby ensuring the stability of the clamp 7 on the PCBA.

[0028] See also Figure 4 In order to further improve the clamping stability of the clamping plates 7, the opposite sides of the two clamping plates 7 are connected with anti-skid layers 13, and the material of the anti-skid layer 13 is one of anti-skid silicone or anti-skid rubber, so as to increase the static friction when contacting the PCBA and prevent the PCBA from slipping off between the clamped clamping plates 7.

[0029] See also Figure 2-3Considering that when the double-headed screw 4 rotates, the slider 5 may rotate with the double-headed screw 4 and cannot move, a light rod 10 is fixed between the two bearing seats 3. The light rod 10 is parallel to the double-headed screw 4, and the slider 5 is slidably connected to the light rod 10. The slider 5 is limited by the sliding action between the slider 5 and the light rod 10, effectively preventing its deflection.

[0030] See also Figure 1 and Figure 3 Considering that in actual use, before clamping the clamping plate 7 PCBA, the user needs to hold the PCBA by hand so that it is located between the two clamping plates 7 and wait for the clamping plate 7 to be clamped, which is time-consuming and laborious. Therefore, a support platform 12 is provided directly below the test body 2. The support platform 12 can hold the PCBA, eliminating the trouble of manually holding the PCBA. Considering that the PCBA needs to be turned over during testing, in order to prevent the support platform 12 from blocking the PCBA when turning over, the support platform 12 is installed on the base 1 through a telescopic member 11, and the telescopic member 11 can adopt one of an electric push rod, a cylinder, and a hydraulic cylinder, so that the support platform 12 can be driven to rise and fall through the telescopic member 11. After the PCBA is clamped, the telescopic member 11 drives the support platform 12 to descend in height to make room for turning over the PCBA.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A small PCBA automatic testing machine, comprising a base (1) and a testing body (2), characterized in that: A double-headed screw (4) is rotatably mounted on the base (1) via a bearing seat (3), the double-headed screw (4) comprising two symmetrical threaded segments with opposite thread directions, and a slider (5) is threadedly connected to the two threaded segments of the double-headed screw (4), a clamping plate (7) is mounted on the slider (5) via a stand (6), the clamping plate (7) is rotatably connected to the stand (6), and a motor (8) for driving the clamping plate (7) to rotate is mounted on the outer side of one of the stands (6), the slider (5), the stand (6) and the clamping plate (7) are symmetrically distributed about the vertical center line of the test body (2), and when the double-headed screw (4) rotates, the two sliders (5) drive the two clamping plates (7) to move closer to or farther from each other via the stand (6) to clamp or loosen the PCBA.

2. A small PCBA automatic testing machine according to claim 1, characterized in that: One end of the double-headed screw (4) passing through one of the bearing seats (3) is connected to the output shaft of the second motor (9).

3. A small PCBA automatic testing machine according to claim 2, characterized in that: A pressure sensor (14) is embedded in the clamping plate (7), and a controller (15) electrically connected to the pressure sensor (14) is also provided on the base (1), and an output end of the controller (15) is electrically connected to the second motor (9).

4. A small PCBA automatic testing machine according to claim 1, characterized in that: A polished rod (10) is also fixed between the two bearing seats (3); the polished rod (10) and the double-headed screw (4) are parallel to each other, and the slider (5) is slidably connected to the polished rod (10).

5. The small PCBA automatic testing machine according to claim 1, characterized in that: The opposite sides of the two clamping plates (7) are both connected with anti-slip layers (13).

6. A small PCBA automatic testing machine according to claim 5, characterized in that: The material of the anti-slip layer (13) is anti-slip silica gel or anti-slip rubber.

7. The small PCBA automatic testing machine according to claim 1, characterized in that: A support platform (12) is provided directly below the test body (2), and the support platform (12) is mounted on the base (1) via a telescopic member (11).

8. A small PCBA automatic testing machine according to claim 7, characterized in that: The telescopic member (11) may be one of an electric push rod, a pneumatic cylinder, and a hydraulic cylinder.

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