Overhead rail type PCB online test mechanism

Abstract

The utility model discloses a hanger rail type PCB (printed circuit board) on-line testing mechanism, which comprises a rack main body, a top plate, a telescopic cylinder, a pressing plate, an upper needle bed, guide columns, a fixed hanger rail, an adjustable hanger rail, a driving motor, a screw rod, a driving wheel, a lower needle plate box, a hanger plate and a connecting rod, the four guide columns are distributed in a rectangular shape, and the upper end and the lower end of each guide column are fixedly connected with the top plate and the rack main body respectively; a cylinder body of the telescopic air cylinder is fixedly installed on the top plate, and the pressing plate and the hanging plate are both installed on the guide columns in a sliding mode. The belt line of the mechanism is hung at the upper part of the lower needle plate box, and the PCB moves downwards along with the hanging rail during testing, namely, the lower needle plate box is fixed, and the PCB moves downwards after being pressed and fixed by the pressing plate. Therefore, the PCB is prevented from displacement after being jacked up by the lower needle plate box, and sliding friction between the PCB and other objects is reduced, so that the PCB is prevented from being scratched, and the positioning test precision is improved. The telescopic cylinder is adopted to control the pressing plate and the hanging plate to move downwards and reset upwards, and the advantages of low power consumption and low cost are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB board testing, in particular to a hanging rail type PCB board online testing mechanism. Background Art

[0002] In order to ensure the assembly quality and stability of the PCB board, its testing work is particularly important. The PCB board on the belt line of the existing testing mechanism does not move, and the lower needle plate box moves upward, which will cause the test positioning to be inaccurate. When the needle plate box moves upward and touches the PCB board and pushes it upward, it will cause sliding friction between the PCB board and the blocking cylinder, resulting in inaccurate test positioning and even scratching the PCB board. The method of pressing the PCB board down first by the upper needle bed requires two driving mechanisms to drive the upper needle bed and the lower needle plate box respectively, which makes the entire mechanism complex, consumes a lot of power, and has the problem of high cost. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a method for driving an upper needle bed and a belt line carrying a PCB board to move downward through a set of driving mechanisms, so as to save energy consumption and avoid position movement of the PCB board, so as to improve the test accuracy.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a hanging rail type PCB board online testing mechanism, including a frame body, a top plate, a telescopic cylinder, a pressure plate, an upper needle bed, a guide column, a fixed hanging rail, an adjustable hanging rail, a driving motor, a screw rod, a driving wheel, a lower needle plate box, a hanging plate, a spring and a connecting rod, four guide columns are distributed in a rectangular shape, and their upper and lower ends are respectively fixedly connected to the top plate and the frame body, the cylinder body of the telescopic cylinder is fixedly mounted on the top plate, the pressure plate and the hanging plate are both slidably mounted on the guide column, the piston rod of the telescopic cylinder is fixedly connected to the pressure plate, the upper needle bed is fixedly mounted on the pressure plate, the lower needle plate box is fixedly mounted on the frame body, the hanging plate is provided with a linear slide rail in the front and rear directions, the fixed hanging rail is fixedly mounted on the hanging plate, and the The adjustable hanging rail is slidably installed on the linear slide rail, and the fixed hanging rail and the adjustable hanging rail are respectively installed with belt lines, the outer end of the lead screw is rotatably installed on the fixed hanging rail through a ball bearing, the adjustable hanging rail is fixedly installed with a transmission sleeve, the inner end of the lead screw is threadedly connected with the transmission sleeve, the outer end of the lead screw is fixedly installed with a driven wheel, the driving motor is fixedly installed on the fixed hanging rail, and a driving wheel is fixedly sleeved on the output shaft of the driving motor, the driving wheel and the driven wheel are connected through belt transmission, the upper end of the connecting rod is fixedly connected to the pressure plate, the lower end of the connecting rod is slidably connected to the hanging plate, the lower end of the connecting rod is threadedly installed with a limit lock nut for supporting the hanging plate, the spring is sleeved on the guide column, and the upper and lower ends of the spring act on the frame body and the hanging plate respectively.

[0005] Preferably, the pressing plate and the hanging plate are both fixedly mounted with guide sleeves, and the guide sleeves are slidably mounted on the guide columns.

[0006] Preferably, a blocking cylinder is fixedly mounted on the fixed hanging rail, a block is fixed on the piston rod of the blocking cylinder, and the block can block the PCB board from moving to the right.

[0007] Preferably, a positioning protrusion is provided at the bottom of the upper needle bed, the bottom end of the positioning protrusion is configured as a spherical structure, and a positioning groove matching the positioning protrusion is provided on the lower needle plate box.

[0008] Compared with the prior art, the utility model has the following advantages: the belt line of the mechanism is hung on the upper part of the lower needle plate box, and the PCB moves downward along with the hanging rail during testing, which is equivalent to the lower needle plate box being stationary, and the PCB moves downward after being fixed by the pressing plate. This avoids displacement of the PCB after being lifted by the lower needle plate box, and reduces the sliding friction between the PCB and other objects, thereby avoiding scratches on the PCB and providing positioning test accuracy. The telescopic cylinder is used to control the downward movement and upward reset of the pressing plate and the hanging plate, which has the advantages of low power consumption and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings.

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 It is a partial enlarged structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] The utility model is described in detail below in conjunction with specific implementation methods:

[0013] like Figure 1 and Figure 2The shown one kind of hanging rail type PCB board online testing mechanism comprises a frame body 1, a top plate 2, a telescopic cylinder 21, a pressing plate 3, an upper needle bed 31, a guide column 4, a fixed hanging rail 5, an adjustable hanging rail, a driving motor 51, a screw rod 52, a driving wheel 53, a lower needle plate box 7, a hanging plate 8, a spring 81 and a connecting rod 9, four guide columns 4 are distributed in a rectangular shape, and their upper and lower ends are respectively fixedly connected with the top plate 2 and the frame body 1, the cylinder body of the telescopic cylinder 21 is fixedly installed on the top plate 2, the pressing plate 3 and the hanging plate 8 are both slidably installed on the guide column 4, the piston rod of the telescopic cylinder 21 is fixedly connected with the pressing plate 3, the upper needle bed 31 is fixedly installed on the pressing plate 3, the lower needle plate box 7 is fixedly installed on the frame body 1, the hanging plate 8 is provided with a linear slide rail 82 in the front and rear directions, the fixed hanging rail 5 is fixedly installed on the hanging plate 8, and the adjustable hanging rail It is slidably installed on the linear slide rail 82, and the fixed hanging rail 5 and the adjustable hanging rail are respectively installed with belt lines. The outer end of the screw rod 52 is rotatably installed on the fixed hanging rail 5 through a ball bearing, and a transmission sleeve is fixedly installed on the adjustable hanging rail. The inner end of the screw rod 52 is threadedly connected with the transmission sleeve, and a driven wheel is fixedly installed on the outer end of the screw rod 52. The driving motor 51 is fixedly installed on the fixed hanging rail 5, and a driving wheel is fixedly sleeved on the output shaft of the driving motor 51. The driving wheel and the driven wheel are connected by belt transmission. The upper end of the connecting rod 9 is fixedly connected to the pressure plate 3, and the lower end of the connecting rod 9 is slidably connected to the hanging plate 8. The lower end of the connecting rod 9 is threadedly installed with a limit lock nut for supporting the hanging plate 8. The spring 81 is sleeved on the guide column 4, and the upper and lower ends of the spring 81 act on the frame body 1 and the hanging plate 8 respectively.

[0014] The pressing plate 3 and the hanging plate 8 are fixedly mounted with a guide sleeve 41, and the guide sleeve 41 is slidably mounted on the guide column 4 to improve the straightness of the pressing plate 3 and the hanging plate 8 when they move up and down. When the guide sleeve 41 is worn, it can be disassembled and replaced separately.

[0015] A blocking cylinder 10 is fixedly installed on the fixed hanging rail 5, and a stopper is fixed on the piston rod of the blocking cylinder 10. The stopper can block the PCB board from moving to the right. After the piston rod of the blocking cylinder 10 pushes the stopper outward, the position of the PCB board on the belt line is limited and blocked, thereby ensuring the testing accuracy of the upper needle bed 31 and the lower needle plate box 7 for the PCB board.

[0016] A positioning protrusion 32 is provided at the bottom of the upper needle bed 31, and the bottom end of the positioning protrusion 32 is set to a spherical structure. A positioning groove 71 matching the positioning protrusion 32 is provided on the lower needle plate box 7. The positioning protrusion 32 is embedded in the positioning groove 71, which can ensure the matching test accuracy of the upper needle bed 31 and the lower needle plate box 7 and avoid displacement of the upper needle bed 31 and the lower needle plate box 7 to affect the test accuracy.

[0017] The telescopic cylinder 21 drives the pressing plate 3 to move upward, and the connecting rod 9 and the limit lock nut pull the hanging plate 8 to reset upward. The PCB board loaded onto the belt line is blocked by the block limit, and the telescopic cylinder 21 pushes the pressing plate 3 to move downward, and the hanging plate 8 falls on the spring 81. At this time, the PCB board does not contact the lower needle plate box 7. After the upper needle bed 31 on the hanging plate 8 is crimped and contacted with the PCB board, the hanging plate 8, the fixed hanging rail 5, the adjustable hanging rail, the driving motor 51, the screw rod 52, the driving wheel 53 combination and the PCB board overcome the elastic force of the spring 81 to move downward. After the PCB board contacts the lower needle plate box 7, the testing operation is carried out. The driving motor 51 drives the screw rod 52 to rotate, and the relative distance between the adjustable hanging rail and the fixed hanging rail 5 is adjusted to meet the testing and use requirements of PCB boards of different sizes. When testing PCB boards of different sizes and types, the upper needle bed 31 and the lower needle plate box 7 that match them are replaced.

Claims

1. A hanging rail type PCB board online testing mechanism, characterized in that: The invention comprises a frame body (1), a top plate (2), a telescopic cylinder (21), a pressing plate (3), an upper needle bed (31), a guide column (4), a fixed hanging rail (5), an adjustable hanging rail, a driving motor (51), a screw rod (52), a driving wheel (53), a lower needle plate box (7), a hanging plate (8), a spring (81) and a connecting rod (9), wherein the four guide columns (4) are distributed in a rectangular shape and the upper and lower ends thereof are respectively fixedly connected to the top plate (2) and the frame body (1), and the telescopic cylinder (21) is The cylinder body is fixedly mounted on the top plate (2), the pressing plate (3) and the hanging plate (8) are both slidably mounted on the guide column (4), the piston rod of the telescopic cylinder (21) is fixedly connected to the pressing plate (3), the upper needle bed (31) is fixedly mounted on the pressing plate (3), the lower needle plate box (7) is fixedly mounted on the frame body (1), the hanging plate (8) is provided with a linear slide rail (82) in the front and rear directions, the fixed hanging rail (5) is fixedly mounted on the hanging plate (8), and the adjustable The hanging rail is slidably mounted on the linear slide rail (82), the fixed hanging rail (5) and the adjustable hanging rail are respectively mounted with belt lines, the outer end of the screw rod (52) is rotatably mounted on the fixed hanging rail (5) through a ball bearing, a transmission sleeve is fixedly mounted on the adjustable hanging rail, the inner end of the screw rod (52) is threadedly connected to the transmission sleeve, a driven wheel is fixedly mounted on the outer end of the screw rod (52), the drive motor (51) is fixedly mounted on the fixed hanging rail (5), and the drive motor ( A driving wheel is fixedly sleeved on the output shaft of the connecting rod (51), and the driving wheel is connected to the driven wheel through a belt transmission. The upper end of the connecting rod (9) is fixedly connected to the pressure plate (3), and the lower end of the connecting rod (9) is slidably connected to the hanging plate (8). A limit lock nut for supporting the hanging plate (8) is screwed on the lower end of the connecting rod (9), and the spring (81) is sleeved on the guide column (4). The upper and lower ends of the spring (81) act on the frame body (1) and the hanging plate (8) respectively.

2. The hanging rail type PCB board online testing mechanism according to claim 1 is characterized in that: The pressing plate (3) and the hanging plate (8) are both fixedly mounted with a guide sleeve (41), and the guide sleeve (41) is slidably sleeved and mounted on the guide column (4).

3. The hanging rail type PCB board online testing mechanism according to claim 1, characterized in that: A blocking cylinder (10) is fixedly mounted on the fixed hanging rail (5), and a block is fixed on the piston rod of the blocking cylinder (10), wherein the block can block the PCB board from moving to the right.

4. The hanging rail type PCB board online testing mechanism according to claim 1, characterized in that: A positioning protrusion (32) is provided at the bottom of the upper needle bed (31), the bottom end of the positioning protrusion (32) is configured as a spherical structure, and a positioning groove (71) matching the positioning protrusion (32) is provided on the lower needle plate box (7).

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