Automatic circuit board lifting and feeding device

Abstract

The invention discloses an automatic lifting and feeding device for circuit boards, and the device comprises a rack which is provided with a first conveying belt and a second conveying belt in an up-and-down manner; a third conveying belt is arranged on the lifting frame; the lifting mechanism is arranged on the rack and connected with the lifting frame to drive the lifting frame to move up and down; the temporary storage frame is placed on the first conveying belt, placing frames are symmetrically arranged on the two sides of the temporary storage frame, a plurality of placing grooves are sequentially formed in each placing frame at intervals from top to bottom, one end of each placing groove is closed, the other end of each placing groove is a through placing opening, and a cover plate capable of closing the placing openings is rotationally arranged on the temporary storage frame. A locking component is arranged between the cover plate and the temporary storage frame. The pushing mechanism comprises a first pushing air cylinder arranged on the rack and located between the two containing frames and a pushing rod arranged on a driving shaft of the first pushing air cylinder; the turnover mechanism comprises a rotating seat rotationally arranged on the rack and a first rotating cylinder; the feeding mechanism comprises an X-Z-axis moving platform and a finger air cylinder.

Description

Technical Field

[0001] The present invention particularly relates to an automatic board lifting and feeding device for circuit boards. Background Art

[0002] In the field of circuit board production and manufacturing, traditional feeding processes mostly rely on manual operation or semi-automatic equipment. In the prior art, there are significant defects in the processes of circuit board buffering, positioning, and transfer: the efficiency of manual loading and unloading is low and it is easy to cause scratches on the surface of the circuit board; conventional conveying equipment lacks a feeding structure for sending out circuit boards in the buffer rack one by one, and cannot achieve continuous feeding at multiple stations; the coordination between the flipping mechanism and the feeding mechanism is poor, and it is difficult to achieve precise conversion of the spatial posture of the circuit board. Moreover, the traditional three-dimensional buffer rack lacks a reliable locking structure, and the circuit board is prone to displacement due to inertia or vibration during transportation. Therefore, there is an urgent need for an automatic board lifting and feeding device for circuit boards. Summary of the Invention

[0003] The present invention aims to solve at least one of the problems existing in the related prior art to some extent. For this purpose, the present invention provides an automatic board lifting and feeding device for circuit boards.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An automatic board lifting and feeding device for circuit boards, comprising:

[0006] A frame, on which a first conveyor belt and a second conveyor belt are respectively distributed vertically;

[0007] A lifting frame, which is movably arranged up and down on the frame, and is provided with a third conveyor belt thereon. The third conveyor belt is respectively connected to the end of the first conveyor belt or the second conveyor belt as the lifting frame moves up and down;

[0008] A lifting mechanism, which is arranged on the frame and connected to the lifting frame for driving the lifting frame to move up and down;

[0009] A buffer rack, which is placed on the first conveyor belt, and symmetrically has placing frames on both sides thereof. The placing frames are sequentially and spaced apart from top to bottom with a plurality of placing slots. One end of the placing slot is closed and the other end is a through placing opening. The circuit board can be placed in the placing slot through the placing opening. A cover plate capable of closing the placing opening is rotatably arranged on the buffer rack, and a locking member capable of driving the cover plate to flip open or keeping the cover plate in a closed state is arranged between the cover plate and the buffer rack;

[0010] A pushing mechanism, which includes a first pushing cylinder arranged on the frame and located between the two placing frames and a push rod arranged on the driving shaft of the first pushing cylinder;

[0011] The flipping mechanism includes a rotating seat rotatably arranged on the frame and a first rotating cylinder capable of driving the rotating seat to rotate 90°. The rotating seat has a cavity with an opening on one side, and the opening of the cavity is horizontally oriented towards the buffer rack in the initial state.

[0012] The feeding mechanism includes an XZ-axis moving platform arranged on the frame and above the flipping mechanism, and a finger cylinder arranged on the moving end of the XZ-axis moving platform for clamping the circuit board.

[0013] In one embodiment, the locking member includes a first moving rack respectively movably arranged on the buffer rack. The first moving rack can move closer to or away from the cover plate. An activity groove is provided at the upper end of the cover plate. The first moving rack is provided with a first fixed shaft, and the first fixed shaft is movably arranged in the activity groove. A first activity shaft is arranged on the first moving rack, and the first activity shaft is vertically movably inserted on the first moving rack. A second activity shaft is fixedly arranged on the first activity shaft. Limiting grooves are symmetrically arranged on both sides of the buffer rack, and the second activity shaft is movably arranged in the limiting grooves. The limiting grooves include a horizontal groove and a vertical groove that are vertically communicated with each other. When the second activity shaft is located in the vertical groove, the cover plate is in a closed state of closing the placement opening. When the second activity shaft is located in the horizontal groove and at the end far from the vertical groove, the cover plate is in an open state of opening the placement opening.

[0014] In one embodiment, the locking member further includes a second moving rack movably arranged on the buffer rack. The second moving rack can move closer to or away from the cover plate, and the displacement direction of the second moving rack is parallel to that of the first moving rack. The second moving rack has a groove with an upper opening, and the second activity shaft is movably abutted in the groove. One side of the groove has a guiding inclined surface, and the guiding inclined surface can abut against the displacement of the second activity shaft as the second moving rack displaces, causing the second activity shaft to move along the vertical groove and the horizontal groove in sequence. A spring is abutted between the second moving rack and the buffer rack.

[0015] In one embodiment, a gantry is provided on the lifting rack, the buffer rack can movably pass through the inside of the gantry, and a driving member capable of driving the second moving rack to displace towards the cover plate is provided on the gantry.

[0016] In one embodiment, the driving member includes a second rotating cylinder arranged on the gantry and a push rod arranged on the driving shaft of the second rotating cylinder.

[0017] In one embodiment, positioning holes are provided on both sides of the buffer rack, and second pushing cylinders are respectively arranged on both sides of the lifting rack. A positioning pin capable of being inserted and matched with the positioning holes is provided on the driving shaft of the second pushing cylinder.

[0018] In one embodiment, the lifting mechanism includes a guide shaft and a screw rod that are respectively arranged vertically on the frame. The screw rod is rotatably arranged on the frame, and a motor capable of driving the screw rod to rotate is provided on the frame. The lifting frame is movably sleeved on the guide shaft through a linear bearing, and the lifting frame is sleeved on the screw rod through a threaded fit.

[0019] In one embodiment, guide plates are symmetrically arranged on both sides of the third conveyor belt on the lifting frame, and the buffer rack is guided and abutted between the two guide plates along with the conveying displacement of the third conveyor belt.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] Through the combination of the upper and lower double-layered first conveyor belt and the second conveyor belt, and the liftable third conveyor belt, and in cooperation with the buffer rack with placement grooves, the present invention realizes the output and conveyance of each circuit board in the three-dimensional buffer queue one by one, supporting uninterrupted continuous transfer and production;

[0022] The coordination of the flipping mechanism and the XZ-axis moving platform, in cooperation with the flexible clamping of the finger cylinder, realizes the 90° flipping and three-dimensional coordinate positioning and clamping conveyance of the circuit board;

[0023] Moreover, the locking member realizes the self-locking and holding of the opening and closing state of the cover plate through the conversion of the limit groove horizontal and vertical grooves and the spring linkage mechanism, effectively preventing the circuit board from shifting and disengaging due to inertia displacement during the conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of an automatic circuit board lifting and feeding device in the present invention;

[0025] Figure 2 is a sectional view of an automatic circuit board lifting and feeding device in the present invention;

[0026] Figure 3 is a partial schematic diagram one of an automatic circuit board lifting and feeding device in the present invention;

[0027] Figure 4 is a partial schematic diagram two of an automatic circuit board lifting and feeding device in the present invention;

[0028] Figure 5 in the present invention Figure 4 is an enlarged schematic diagram at A;

[0029] Figure 6 in the present invention Figure 4 is an enlarged schematic diagram at B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following specific implementation details provide various different embodiments or examples for implementing the present invention. Of course, these are only embodiments or examples and are not intended to be restrictive. Additionally, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures being discussed.

[0031] As Figures 1 to 6 shown, an automatic circuit board lifting and feeding device includes: a frame 1, on which a first conveyor belt 2 and a second conveyor belt 3 are respectively distributed vertically; a lifting frame 4, which is vertically movably arranged on the frame 1, and on which a third conveyor belt 5 is provided. The third conveyor belt 5 is respectively connected to the end of the first conveyor belt 2 or the second conveyor belt 3 as the lifting frame 4 moves up and down; a lifting mechanism 6, which is arranged on the frame 1 and connected to the lifting frame 4 to drive the lifting frame 4 to move up and down; a buffer rack 7, which is placed on the first conveyor belt 2, and both sides thereof symmetrically have placing racks 71. The placing racks 71 are sequentially spaced apart from top to bottom with a number of placing slots 72. One end of the placing slot 72 is closed and the other end is a through placing opening 73. A circuit board can be placed in the placing slot 72 through the placing opening 73. A cover plate 74 that can close the placing opening 73 is rotatably arranged on the buffer rack 7, and a locking member 8 that can drive the cover plate 74 to flip open or keep the cover plate 74 in a closed state is provided between the cover plate 74 and the buffer rack 7; a pushing mechanism, which includes a first pushing cylinder 9 arranged on the frame 1 and located between the two placing racks 71 and a push rod 10 arranged on the driving shaft of the first pushing cylinder 9; a flipping mechanism, which includes a rotating seat 11 rotatably arranged on the frame 1 and a first rotating cylinder 12 that can drive the rotating seat 11 to rotate 90°. The rotating seat 11 has a cavity 13 with an opening on one side, and the opening of the cavity 13 is horizontally oriented towards the buffer rack 7 in the initial state; a feeding mechanism, which includes an XZ-axis moving platform 14 arranged on the frame 1 and above the flipping mechanism, and a finger cylinder 15 arranged on the moving end of the XZ-axis moving platform 14 that can clamp the circuit board.

[0032] Both the XZ-axis moving platform and the finger cylinder are relatively mature existing technologies, and their structural principles will not be elaborated in detail here. The XZ-axis moving platform is capable of driving the finger cylinder to move along the X-axis and Z-axis directions respectively, and the finger cylinder can clamp and release the circuit board.

[0033] Specifically, the buffer rack full of circuit boards is conveyed by the first conveyor belt to the lifting rack area. At this time, the locking member drives the cover plate to flip open, and the lifting mechanism drives the lifting rack to move up and down, so that the circuit boards in each placement slot are aligned with the push rod in the pushing mechanism one by one in sequence. Then, the first pushing cylinder in the pushing mechanism drives the push rod to move, so that the push rod touches the circuit board in the placement slot, causing the circuit board to move through the placement opening into the cavity of the rotating seat. Then, the first rotating cylinder drives the rotating seat to rotate 90 degrees, so that the circuit board rotates from a horizontal state to a vertical state. The XZ-axis moving platform controls the finger cylinder to move downward to clamp the circuit board. After the spatial position adjustment is completed, it is transferred to the next process, thereby realizing the output and conveying of the buffer rack one by one. And by clamping the circuit board vertically, it avoids the situation that when using a horizontal-state vacuum chuck to adsorb, the adsorption force is insufficient due to the hole positions on the circuit board and the circuit board drops.

[0034] Further, the locking member 8 includes a first moving rack 81 movably arranged on the buffer rack 7 respectively. The first moving rack 81 can move closer to or away from the cover plate 74. An activity slot 82 is provided at the upper end of the cover plate 74. The first moving rack 81 is provided with a first fixed shaft 83. The first fixed shaft 83 is movably arranged in the activity slot 82. The first moving rack 81 is provided with a first activity shaft 84. The first activity shaft 84 is vertically movably inserted on the first moving rack 81. A second activity shaft 85 is fixedly arranged on the first activity shaft 84. Limiting slots are symmetrically arranged on both sides of the buffer rack 7. The second activity shaft 85 is movably arranged in the limiting slot. The limiting slot includes a transverse slot 86 and a vertical slot 87 that are vertically communicated with each other. When the second activity shaft 85 is located in the vertical slot 87, the cover plate 74 is in a closed state closing the placement opening 73. When the second activity shaft 85 is located in the transverse slot 86 and at the end far from the vertical slot 87, the cover plate 74 is in an open state opening the placement opening 73.

[0035] Specifically, in the initial state, the second activity shaft is located in the vertical slot of the limiting slot. Due to the limitation of the vertical slot, the first moving rack cannot move closer to the cover plate, and thus the cover plate is in a connected state closing the placement opening at this time. Even if the buffer rack moves with the conveyor belt, the circuit boards in the placement slot will not shift out due to inertia.

[0036] When it is necessary to take out the circuit board in the buffer rack, by driving the second activity shaft to move upward along the vertical slot, the first activity shaft moves upward relative to the first moving rack. When the second activity shaft moves upward out of the vertical slot and displaces into the transverse slot, the first activity shaft can displace along the transverse slot with the second activity shaft, and the first activity shaft abuts against the first moving rack, causing the first moving rack to move closer to the cover plate. At this time, the first fixed shaft in the first moving rack abuts against the activity slot of the cover plate, driving the cover plate to rotate relative to the buffer rack, realizing the opening of the placement opening.

[0037] Furthermore, the locking member 8 also includes a second movable frame 88 movably arranged on the buffer frame 7, the second movable frame 88 can move closer to or away from the cover plate 74, and the displacement direction of the second movable frame 88 is parallel to that of the first movable frame 81, the second movable frame 88 has a groove 89 with an upper opening, the second movable shaft 85 movably abuts in the groove 89, one side of the groove 89 has a guide inclined surface 90, the guide inclined surface 90 can abut against the displacement of the second movable shaft 85 with the displacement of the second movable frame 88, so that the second movable shaft 85 moves along the vertical groove 87 and the horizontal groove 86 in sequence, and a spring 91 abuts between the second movable frame 88 and the buffer frame 7. Specifically, through the displacement of the second movable frame, the spring is compressed to lift the second movable shaft upward along the guide inclined surface of the groove and the vertical groove of the limit groove, and slide into the horizontal groove of the limit groove with the displacement of the second movable frame, at this time, the first movable frame is driven to be linked, and the cover plate is driven to flip and open the placement port through the cooperation of the movable groove and the first fixed shaft. When the cover needs to be closed, it is only necessary to release the force applied to the second movable frame, and the spring is reset to reset the second movable frame, thereby driving the second movable shaft and the first movable frame to reset in turn. The second movable shaft can be reset to the vertical slot to achieve the re-locking and closure of the cover.

[0038] Furthermore, the lifting frame 4 has a gantry 41, the buffer frame 7 can move through the inner side of the gantry 41, and the gantry 41 is provided with a driving member 42 that can drive the second mobile frame 88 to move toward the cover plate 74. Further, the driving member 42 includes a second rotary cylinder 43 disposed on the gantry 41, and a push rod 44 disposed on the driving shaft of the second rotary cylinder 43. Specifically, the push rod is driven to rotate by the second rotary cylinder, so that the push rod rotates to push the second mobile frame to move.

[0039] Furthermore, the cache rack 7 has positioning holes 75 on both sides, and the lifting frame 4 has second push cylinders 76 on both sides, and the driving shaft of the second push cylinder 76 is provided with positioning pins 77 that can be plugged into the positioning holes 75. Specifically, the cache rack is transported to the lifting frame area by the first conveyor belt, and the second push cylinder drives the positioning pins to insert into the positioning holes of the cache rack to complete precise positioning.

[0040] Further, the lifting mechanism 6 includes a guide shaft 61 and a screw rod 62 respectively arranged vertically on the frame 1, the screw rod 62 is rotatably arranged on the frame 1, and a motor 63 capable of driving the screw rod 62 to rotate is arranged on the frame 1, the lifting frame 4 is movably sleeved on the guide shaft 61 through a linear bearing, and the lifting frame 4 is sleeved on the screw rod 62 through threaded matching. Specifically, the screw rod is driven to rotate by the motor of the lifting mechanism, driving the lifting frame to rise and fall along the guide shaft, so that the third conveyor belt is accurately docked with the second conveyor belt and the first conveyor belt, so as to realize the transfer and transportation of fully loaded and unloaded cache racks.

[0041] Furthermore, guide plates 64 are symmetrically provided on the lifting frame 4 and located on both sides of the third conveyor belt 5 , and the buffer rack 7 is guided and abutted between the two guide plates 64 along with the displacement of the third conveyor belt 5 .

[0042] The specific process is as follows:

[0043] Cache positioning stage: The cache rack fully loaded with circuit boards is transported to the lifting rack area by the first conveyor belt, and the second push cylinder drives the positioning pin to insert into the cache rack positioning hole to complete precise positioning. The second rotary cylinder on the gantry pushes the second mobile rack to move through the push rod, and the spring is compressed to lift the second movable shaft upward along the guide slope of the groove and the vertical groove of the limit groove, and slide into the horizontal groove of the limit groove as the second mobile rack moves, at this time driving the first mobile rack to move, and through the cooperation of the movable groove and the first fixed axis, the cover plate is driven to flip and open the placement port.

[0044] During the board lifting and conveying stage: the first push cylinder of the material pushing mechanism drives the push rod to push the circuit board at the specified layer from the placement slot to the cavity of the flipping mechanism. The first rotating cylinder drives the rotating seat to rotate 90°, so that the circuit board turns from horizontal to vertical. The XZ axis moving platform controls the finger cylinder to move downward to clamp the circuit board, and after the spatial position adjustment is completed, it is transferred to the next process.

[0045] Layer switching control: When all circuit boards in the current layer are taken out, the motor of the lifting mechanism drives the screw to rotate, driving the lifting frame to rise and fall along the guide shaft, so that the third conveyor belt can accurately dock with the second conveyor belt to realize the unloading of the empty buffer rack. At the same time, the first conveyor belt transports the new buffer rack to the work station, and the dual guidance of the guide shaft and the guide plate ensures the centering accuracy of the buffer rack, completing the continuous feeding cycle.

[0046] In conjunction with the drawings and the above, the basic principles and main features of the present invention and the advantages of the present invention are shown and described. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A circuit board automatic lifting and feeding device, characterized in that: include: A frame (1) on which a first conveyor belt (2) and a second conveyor belt (3) are respectively distributed above and below; A lifting frame (4) is movably arranged on the frame (1) in an up-and-down manner, and a third conveyor belt (5) is arranged on the lifting frame. The third conveyor belt (5) is connected to the end of the first conveyor belt (2) or the end of the second conveyor belt (3) respectively as the lifting frame (4) moves up and down; A lifting mechanism (6) is arranged on the frame (1) and connected to the lifting frame (4) to drive the lifting frame (4) to move up and down; A buffer rack (7) is placed on the first conveyor belt (2), and has a placement rack (71) symmetrically disposed on both sides thereof. The placement rack (71) is provided with a plurality of placement slots (72) arranged in sequence from top to bottom, one end of the placement slot (72) is closed and the other end is a placement opening (73) that penetrates, and the circuit board can be accommodated in the placement slot (72) through the placement opening (73). A cover plate (74) that can close the placement opening (73) is rotatably disposed on the buffer rack (7), and a locking component (8) that can drive the cover plate (74) to flip open or keep the cover plate (74) in a closed state is disposed between the cover plate (74) and the buffer rack (7); The material pushing mechanism comprises a first pushing cylinder (9) arranged on the frame (1) and located between two placement racks (71), and a pushing rod (10) arranged on the driving shaft of the first pushing cylinder (9); The turning mechanism comprises a rotating seat (11) rotatably arranged on a frame (1), and a first rotating cylinder (12) capable of driving the rotating seat (11) to rotate 90 degrees, wherein the rotating seat (11) has a cavity (13) with an opening on one side, and the cavity (13) is opened horizontally toward the cache rack (7) in an initial state; The feeding mechanism comprises an XZ axis moving platform (14) arranged on a frame (1) and located above a turning mechanism, and a finger cylinder (15) arranged at the moving end of the XZ axis moving platform (14) and capable of clamping a circuit board.

2. The automatic circuit board lifting and feeding device according to claim 1 is characterized in that: The locking component (8) includes a first movable frame (81) movably arranged on the buffer frame (7), the first movable frame (81) can move closer to or away from the cover plate (74), a movable groove (82) is arranged at the upper end of the cover plate (74), the first movable frame (81) is provided with a first fixed shaft (83), the first fixed shaft (83) is movably arranged in the movable groove (82), the first movable frame (81) is provided with a first movable shaft (84), the first movable shaft (84) is movably inserted into the first movable frame (81) up and down, and the first movable shaft (84), and limiting grooves are symmetrically provided on both sides of the cache rack (7). The second movable shaft (85) is movably arranged in the limiting grooves, and the limiting grooves include a transverse groove (86) and a vertical groove (87) vertically connected to each other. When the second movable shaft (85) is located in the vertical groove (87), the cover plate (74) is in a closed state closing the placement opening (73); when the second movable shaft (85) is located in the transverse groove (86) and away from one end of the vertical groove (87), the cover plate (74) is in an open state opening the placement opening (73).

3. The automatic circuit board lifting and feeding device according to claim 2 is characterized in that: The locking component (8) also includes a second movable frame (88) movably arranged on the buffer frame (7), the second movable frame (88) can move closer to or away from the cover plate (74), and the displacement direction of the second movable frame (88) and the first movable frame (81) are arranged in parallel, the second movable frame (88) has an upper opening groove (89), the second movable shaft (85) movably abuts in the groove (89), and one side of the groove (89) has a guide inclined surface (90), the guide inclined surface (90) can abut the displacement of the second movable shaft (85) with the displacement of the second movable frame (88), so that the second movable shaft (85) moves along the vertical groove (87) and the horizontal groove (86) in sequence, and a spring (91) is abutted between the second movable frame (88) and the buffer frame (7).

4. The automatic circuit board lifting and feeding device according to claim 3 is characterized in that: The lifting frame (4) is provided with a gantry (41), the buffer frame (7) can move through the inner side of the gantry (41), and the gantry (41) is provided with a driving component (42) capable of driving the second moving frame (88) to move toward the cover plate (74).

5. The automatic circuit board lifting and feeding device according to claim 4 is characterized in that: The driving component (42) comprises a second rotating cylinder (43) arranged on the gantry (41), and a push rod (44) arranged on a driving shaft of the second rotating cylinder (43).

6. The automatic circuit board lifting and feeding device according to claim 1 is characterized in that: The cache rack (7) has positioning holes (75) on both sides, and the lifting rack (4) has second pushing cylinders (76) on both sides. The driving shaft of the second pushing cylinder (76) is provided with a positioning pin (77) that can be plugged into the positioning hole (75).

7. The automatic circuit board lifting and feeding device according to claim 1 is characterized in that: The lifting mechanism (6) comprises a guide shaft (61) and a screw rod (62) which are respectively arranged vertically on the frame (1); the screw rod (62) is rotatably arranged on the frame (1); a motor (63) capable of driving the screw rod (62) to rotate is arranged on the frame (1); the lifting frame (4) is movably sleeved on the guide shaft (61) through a linear bearing; and the lifting frame (4) is sleeved on the screw rod (62) through threaded fitting.

8. The automatic circuit board lifting and feeding device according to claim 1 is characterized in that: Guide plates (64) are symmetrically arranged on the lifting frame (4) and located on both sides of the third conveyor belt (5); the buffer frame (7) is guided by the third conveyor belt (5) to abut between the two guide plates (64).

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