Back drilling fixing support for PCB (printed circuit board)

Abstract

The utility model discloses a back drilling fixing support for a PCB (printed circuit board), which comprises a fixing base, the top of the fixing base is fixedly connected with limiting supports which are symmetrically distributed, the center of the upper surface of the fixing base is fixedly provided with an air cylinder, one end of a piston rod of the air cylinder is fixedly connected with a vacuum chuck, and the other end of the piston rod of the air cylinder is fixedly connected with a piston rod. A first pressure sensor is fixedly installed on the outer surface of the vacuum suction cup, a fixing mechanism is arranged above the fixing base and comprises two-way lead screws, the two-way lead screws are rotationally connected into installation holes of the limiting support in a sleeved mode, and the two-way lead screws are symmetrically distributed with the axis of the limiting support as the symmetric center line. According to the back drilling fixing support for the PCB, the fixing mechanism is arranged, the PCB can be tightly clamped, so that the conditions of displacement, shaking and the like in the drilling process are avoided, the accuracy and the stability of subsequent drilling are ensured, meanwhile, the probability of drilling failure is reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board processing, in particular to a back drilling fixing bracket for a PCB board. Background Art

[0002] As is known to all, a fixing device for drilling holes in a PCB board is an auxiliary device for fixing a PCB board, facilitating drilling holes thereon and improving drilling accuracy, and is widely used in the field of PCB board processing; an existing fixing device for drilling holes in a PCB board comprises a placing plate, and a positioning groove is arranged on the top of the placing plate; when the existing fixing device for drilling holes in a PCB board is used, the PCB board is placed in the positioning groove for positioning; it is found in the use of the existing fixing device for drilling holes in a PCB board that it can only position and fix a PCB board of a specific size, resulting in high limitations in use; at the same time, it is inconvenient to take and place the PCB board, resulting in low work efficiency. Utility Model Content

[0003] The utility model aims to provide a back-drilling fixing bracket for a PCB board to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a back-drilling fixing bracket for a PCB board, comprising a fixing base, the top of the fixing base is fixedly connected with a symmetrically distributed limit bracket, a cylinder is fixedly installed at the center of the upper surface of the fixing base, one end of the piston rod of the cylinder is fixedly connected with a vacuum suction cup, a first pressure sensor is fixedly installed on the outer surface of the vacuum suction cup, a fixing mechanism is arranged above the fixing base, and the fixing mechanism comprises a bidirectional screw rod, the bidirectional screw rod is rotatably sleeved in the mounting hole of the limit bracket, the two bidirectional screw rods are symmetrically distributed with the axis of the limit bracket as the symmetrical center line, and a controller for controlling the fixing mechanism is fixedly installed on the front side of one of the limit brackets.

[0005] Preferably, the fixing mechanism also includes a driving motor fixedly mounted on the left surface of the fixed base, and the output shaft of the driving motor is fixedly mounted with a worm through a coupling, one end of the worm is rotatably sleeved with the inner wall of the fixed base, and the driving motor is started by controlling the controller, and the driving motor drives the worm to realize circular rotation with the axis of the driving motor as the center of the circle.

[0006] Preferably, one of the bidirectional screw rods is located below the limiting bracket and has a worm gear fixedly sleeved on one end. The worm gear is meshed with the worm gear. Adjacent bidirectional screw rods are connected via a belt transmission mechanism. The belt transmission mechanism includes a driving wheel, a driven wheel, and a transmission belt. The transmission belt is used to transfer power from one of the bidirectional screw rods to another bidirectional screw rod, thereby achieving synchronous rotation of multiple bidirectional screw rods.

[0007] Preferably, the surface of the bidirectional screw rod is threadedly sleeved with a left-handed upper moving block and a right-handed lower moving block at both ends with the center as the boundary. The outer surfaces of the left-handed upper moving block and the right-handed lower moving block are slidably sleeved with the inner wall of the limit groove of the limit bracket, thereby guiding the movement direction of the left-handed upper moving block and the right-handed lower moving block.

[0008] Preferably, the other ends of the left-handed upper moving block and the right-handed lower moving block are threadedly connected to the two end surfaces of the other bidirectional screw rod, and the upper surfaces of the left-handed upper moving block and the right-handed lower moving block are evenly spaced and provided with symmetrically distributed adjustment holes.

[0009] Preferably, a pressure plate is inserted into the inner wall of the adjustment hole, and the adjustment hole is connected to the pressure plate by bolts. Through the cooperation of the adjustment hole and the bolts, PCB boards of different sizes can be clamped.

[0010] Preferably, a second pressure sensor is fixedly mounted on the lower surface of one of the pressing plates, and the lower surface of the second pressure sensor is on the same horizontal plane as the lower surface of one of the pressing plates. The first pressure sensor and the cylinder are electrically connected to the controller. The second pressure sensor is provided to monitor the clamping force applied by the pressing plate to the PCB in real time, and the monitoring data is fed back to the controller. When the applied clamping force reaches a preset pressure value, the controller controls the drive motor to stop working.

[0011] Compared with the prior art, the beneficial effect of the utility model is that the back-drilling fixing bracket on the PCB board can achieve tight clamping of the PCB board by setting a fixing mechanism, thereby avoiding displacement, shaking and the like during the drilling process, ensuring the accuracy and stability of subsequent drilling, and reducing the probability of drilling failure, thereby improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 A three-dimensional diagram of a vacuum suction cup structure for a back-drilling fixing bracket on a PCB board proposed by the utility model;

[0014] Figure 3 This is a three-dimensional diagram of a pressure plate structure for a back-drilling fixing bracket on a PCB board proposed by the utility model.

[0015] In the figure: 1. fixed base; 2. limit bracket; 3. cylinder; 4. vacuum suction cup; 5. first pressure sensor; 6. bidirectional screw; 61. drive motor; 62. worm; 63. worm gear; 64. belt transmission mechanism; 65. left-handed upper moving block; 66. right-handed lower moving block; 67. adjustment hole; 68. pressure plate; 69. bolt; 610. second pressure sensor; 7. controller. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-Figure 3 The utility model provides a technical solution: a back-drilling fixing bracket for a PCB board, comprising a fixing base 1, a symmetrically distributed limit bracket 2 is fixedly connected to the top of the fixing base 1, a cylinder 3 is fixedly installed at the center of the upper surface of the fixing base 1, a vacuum suction cup 4 is fixedly connected to one end of the piston rod of the cylinder 3, a first pressure sensor 5 is fixedly installed on the outer surface of the vacuum suction cup 4, a fixing mechanism is arranged above the fixing base 1, and the fixing mechanism comprises a bidirectional screw rod 6, the bidirectional screw rod 6 is rotatably sleeved in the mounting hole of the limit bracket 2, the two bidirectional screw rods 6 are symmetrically distributed with the axis of the limit bracket 2 as the symmetrical center line, and a controller 7 for controlling the fixing mechanism is fixedly installed on the front of one of the limit brackets 2.

[0018] Furthermore, the fixing mechanism also includes a driving motor 61 fixedly mounted on the left side surface of the fixed base 1, and the output shaft of the driving motor 61 is fixedly mounted with a worm 62 through a coupling, and one end of the worm 62 is rotatably sleeved with the inner wall of the fixed base 1. The driving motor 61 is started by the controller 7, and the driving motor 61 drives the worm 62 to realize circular rotation with the axis of the driving motor 61 as the center of the circle.

[0019] Furthermore, one end of one of the bidirectional screw rods 6 located below the limit bracket 2 is fixedly sleeved with a worm gear 63, and the worm 62 is meshed with the worm gear 63. Adjacent bidirectional screw rods 6 are connected by a belt transmission mechanism 64. The belt transmission mechanism 64 includes a driving wheel, a driven wheel, and a transmission belt. The transmission belt is used to transfer power from one of the bidirectional screw rods 6 to another bidirectional screw rod 6, thereby achieving synchronous rotation of multiple bidirectional screw rods 6.

[0020] Furthermore, the surface of the bidirectional screw rod 6 is threadedly sleeved with a left-handed upper moving block 65 and a right-handed lower moving block 66 at both ends with the center as the boundary. The outer surfaces of the left-handed upper moving block 65 and the right-handed lower moving block 66 are slidably sleeved with the inner wall of the limiting groove of the limiting bracket 2, thereby guiding the movement direction of the left-handed upper moving block 65 and the right-handed lower moving block 66.

[0021] Furthermore, the other ends of the left-handed upper moving block 65 and the right-handed lower moving block 66 are threadedly connected to the two end surfaces of the other bidirectional screw rod 6, and the upper surfaces of the left-handed upper moving block 65 and the right-handed lower moving block 66 are evenly spaced and symmetrically distributed with adjustment holes 67.

[0022] Furthermore, a pressure plate 68 is inserted into the inner wall of the adjustment hole 67, and the adjustment hole 67 is connected to the pressure plate 68 via a bolt 69. Through the cooperation of the adjustment hole 67 and the bolt 69, PCB boards of different sizes can be clamped.

[0023] Furthermore, a second pressure sensor 610 is fixedly installed on the lower surface of one of the pressure plates 68, and the lower surface of the second pressure sensor 610 is on the same horizontal plane as the lower surface of one of the pressure plates 68. The first pressure sensor 5 and the cylinder 3 are electrically connected to the controller 7. The second pressure sensor 610 is provided to monitor the clamping force applied by the pressure plate 68 to the PCB in real time, and the monitoring data is fed back to the controller 7. When the applied clamping force reaches a preset pressure value, the controller 7 controls the drive motor 61 to stop working.

[0024] By setting up a fixing mechanism, the PCB board can be tightly clamped, thereby avoiding displacement, shaking, etc. during the drilling process, ensuring the accuracy and stability of subsequent drilling, and reducing the probability of drilling failure, thereby improving production efficiency and product quality.

[0025] Working principle: Step 1, the vacuum suction cup 4 is connected to the external vacuum pump equipment through the pipeline. When the PCB board needs to be fixed, first, the PCB board to be drilled is placed face down in contact with the vacuum suction cup 4, and the vacuum pump equipment is controlled to start by the controller 7. The vacuum pump extracts the air in the vacuum suction cup 4 through the pipeline, so that a low-pressure area is formed between the vacuum suction cup 4 and the PCB board, thereby generating an adsorption force. The pressure in the vacuum suction cup 4 is monitored by the first pressure sensor 5 provided on the outer surface of the vacuum suction cup 4;

[0026] Step 2, then, when the pressure drops to a preset value, according to the size specifications of the PCB board, the controller 7 controls the cylinder 3 to extend to a telescopic length corresponding to the size specifications, and the specific length distance is obtained through a large number of experiments and actual operations. The controller 7 controls the drive motor 61 to start, and the drive motor 61 drives the worm 62 and the worm wheel 63 to achieve meshing action. Through the belt transmission mechanism 64 set between adjacent bidirectional screw rods 6, the four bidirectional screw rods 6 are driven to achieve synchronous rotation, and the left-handed upper moving block 65 and the right-handed lower moving block 66 set on the surface of the bidirectional screw rod 6 are driven to achieve a mutually closed action along the bolt 69 curve of the bidirectional screw rod 6, and the pressure plate 6 is used to 8 realizes the clamping action on the edges of the upper and lower surfaces of the PCB board, and a second pressure sensor 610 is set to realize real-time monitoring of the clamping force applied by the pressure plate 68 to the PCB, and the monitoring data is fed back to the controller 7. When the applied clamping force reaches a preset pressure value, the controller 7 controls the driving motor 61 to stop working. In addition, through the cooperation of the adjustment hole 67 and the bolt 69, the clamping of PCB boards of different sizes is realized, and then the double fixing effect of the PCB board is realized at different positions through the above steps 1 and 2. After the fixing is completed, the back side of the PCB board can be drilled from the top of the fixed base 1 through the drilling equipment.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A back-drilling fixing bracket for a PCB board, comprising a fixing base (1), characterized in that: The top of the fixed base (1) is fixedly connected to a symmetrically distributed limit bracket (2); a cylinder (3) is fixedly installed at the center of the upper surface of the fixed base (1); one end of the piston rod of the cylinder (3) is fixedly connected to a vacuum suction cup (4); a first pressure sensor (5) is fixedly installed on the outer surface of the vacuum suction cup (4); a fixing mechanism is arranged above the fixed base (1), and the fixing mechanism includes a bidirectional screw rod (6); the bidirectional screw rod (6) is rotatably sleeved in the mounting hole of the limit bracket (2); the two bidirectional screw rods (6) are symmetrically distributed with the axis of the limit bracket (2) as the symmetrical center line; a controller (7) for controlling the fixing mechanism is fixedly installed on the front side of one of the limit brackets (2).

2. A back-drilling fixing bracket for a PCB board according to claim 1, characterized in that: The fixing mechanism also includes a driving motor (61) fixedly mounted on the left side surface of the fixing base (1); a worm (62) is fixedly mounted on the output shaft of the driving motor (61) via a coupling; one end of the worm (62) is rotatably sleeved with the inner wall of the fixing base (1).

3. A back-drilling fixing bracket for a PCB board according to claim 2, characterized in that: One end of one of the bidirectional screw rods (6) located below the limiting bracket (2) is fixedly sleeved with a worm wheel (63), the worm (62) is meshed with the worm wheel (63), and adjacent bidirectional screw rods (6) are connected in transmission via a belt transmission mechanism (64).

4. The back-drilling fixing bracket for a PCB board according to claim 3, characterized in that: The surface of the bidirectional screw rod (6) is threadedly sleeved with a left-handed upper moving block (65) and a right-handed lower moving block (66) at both ends with the center as the boundary, and the outer surfaces of the left-handed upper moving block (65) and the right-handed lower moving block (66) are slidably sleeved with the inner wall of the limiting groove of the limiting bracket (2).

5. The back-drilling fixing bracket for a PCB board according to claim 4, characterized in that: The other ends of the left-handed upper moving block (65) and the right-handed lower moving block (66) are threadedly sleeved with the two end surfaces of the other bidirectional screw rod (6), and the upper surfaces of the left-handed upper moving block (65) and the right-handed lower moving block (66) are provided with symmetrically distributed adjustment holes at equal intervals.

6. The back-drilling fixing bracket for a PCB board according to claim 5, characterized in that: A pressure plate (68) is inserted into the inner wall of the adjustment hole (67), and the adjustment hole (67) is connected to the pressure plate (68) via a bolt (69).

7. The back-drilling fixing bracket for a PCB board according to claim 6, characterized in that: A second pressure sensor (610) is fixedly mounted on the lower surface of one of the pressure plates (68), and the lower surface of the second pressure sensor (610) is on the same horizontal plane as the lower surface of one of the pressure plates (68). The first pressure sensor (5) and the cylinder (3) are both electrically connected to the controller (7).

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