Automatic edge trimming and aligning device for circuit board

Abstract

The invention discloses an automatic edge trimming and aligning device for a circuit board, and particularly relates to the technical field of circuit board conveying devices.The automatic edge trimming and aligning device comprises a machine table, a conveying structure is arranged in an inner cavity of the machine table, and a driving motor in transmission connection with the conveying structure is fixedly connected to the lower portion of the front end of the machine table; trimming positioning structures are bilaterally symmetrically arranged on the rear part of the upper end of the machine table, and a feeding structure in lap joint with the upper end of the machine table is fixedly connected to the upper part of the rear end of the machine table. According to the automatic edge-trimming alignment device for the circuit board, the front and back positions of the circuit board are positioned and adjusted under the action of the driving motor through the cooperation of the positioning assembly and the reciprocating screw rod II, and the edge-trimming driving assembly is driven to act through the cooperation of the positioning assembly and the edge-trimming driving assembly; and through cooperation of the second reciprocating screw rod and the conveying assembly, the circuit board after positioning is sent to the next working procedure under the limiting effect of the conveying guide groove, and continuous feeding is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board conveying devices, and in particular to an automatic edge straightening and alignment device for circuit boards. Background Art

[0002] With the rapid development of electronic technology, the manufacturing process and precision requirements of printed circuit boards (PCBs), as an indispensable basic component in electronic products, are also constantly improving. The edge positioning technology of the circuit board is a key step to ensure the accurate alignment of the circuit board in the subsequent processing process, which is directly related to the quality and production efficiency of the product. In the modern electronic manufacturing industry, the size and precision requirements of the circuit board are getting higher and higher, and the traditional manual positioning method can no longer meet the high-precision and high-efficiency production needs.

[0003] At present, the positioning technology of circuit boards mainly relies on mechanical devices and simple automation systems. The existing technologies mostly use the rotation of threaded rods to achieve the positioning of circuit boards, and use hydraulic cylinders and lifting plates in conjunction with punching mechanisms and positioning components to achieve the clamping and positioning of circuit boards. These technologies have improved the accuracy of circuit board positioning and the convenience of operation to a certain extent. However, these methods usually only involve positioning in a single direction, or require complex mechanical structures and multi-step operation processes, which limits their application efficiency and flexibility in actual production.

[0004] Although the existing circuit board positioning technology has achieved automation to a certain extent, it still has some obvious defects. First, the existing technology is often unable to accurately position the circuit board in both the horizontal and vertical directions at the same time, which leads to deviations and errors that may occur in the subsequent processing. Secondly, after the positioning is completed, the circuit board often requires additional handling or transportation steps before it can enter the next process, which not only increases the complexity of the operation, but also reduces the overall production efficiency. In addition, the operation of some positioning devices is too cumbersome and requires multiple adjustments and repositioning, which is particularly inconvenient in a fast-paced production environment. Summary of the invention

[0005] The main purpose of the present invention is to provide an automatic edge alignment device for circuit boards, which can effectively solve the problem that the existing devices cannot synchronously position in the horizontal and vertical directions, and cannot be stably transported to the next process after positioning is completed.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A device for automatic edge straightening and alignment of circuit boards comprises a machine platform, an inner cavity of the machine platform is provided with a conveying structure, a driving motor which is transmission-connected to the conveying structure is fixedly connected to the lower front end of the machine platform, an edge straightening and positioning structure is symmetrically arranged at the rear of the upper end of the machine platform, the rear side of the conveying structure is transmission-connected to the edge straightening and positioning structure through a transmission belt, a feeding structure which overlaps the upper end of the machine platform is fixedly connected to the upper rear end of the machine platform, and the feeding structure is located directly behind the edge straightening and positioning structure.

[0008] Preferably, the feeding structure includes a support platform fixedly connected to the upper part of the rear end of the machine, the upper end of the support platform and the rear part of the upper end of the machine are jointly fixedly connected with a material storage box, the lower part of the front end of the material storage box is provided with a discharge port connected to the inner cavity thereof, a feeding motor is fixedly installed at the rear part of the upper end of the machine through a bracket, the output end of the feeding motor is fixedly connected to a rubber wheel, the lower end of the material storage box is provided with a slot with the same width as the rubber wheel, and the upper part of the outer surface of the rubber wheel is flush with the bottom wall of the inner cavity of the material storage box.

[0009] Preferably, the edge straightening positioning structure includes some positioning components arranged in the middle of the inner surface of the machine table away from the conveying structure, a reciprocating slide groove is provided on the side of the upper end of the machine table away from the conveying structure, an arc groove is provided on the part of the upper end of the machine table located between the positioning component and the reciprocating slide groove, and a slide groove 1 is symmetrically provided on the upper end of the machine table along the central axis of the arc groove, and the inner surfaces of the two slide grooves 1 are jointly provided with an edge straightening component that is tightly attached to the edge straightening drive component.

[0010] Preferably, the positioning assembly includes a conveyor belt installed on the inner surface of the machine, and both support shafts of the conveyor belt are rotatably connected to the inner surface of the machine, a front stopper is fixedly connected to the front of one side of the upper end of the machine close to the conveyor belt, and a rear stopper is fixedly connected to the rear of one side of the upper end of the machine close to the conveyor belt, the rear stopper is located on the lower front side of the storage box and its upper end is rotatably connected to a relay wheel.

[0011] Preferably, the inner surface of the support shaft at the front of the conveying belt is fixedly connected to a transmission shaft, and a bevel gear 2 is fixedly installed in the middle of the outer surface of the transmission shaft. The output end of the bevel gear 2 is connected to the conveying structure through a transmission belt, and the left and right ends of the transmission shaft are symmetrically fixedly connected to bevel gear 1, and the two output ends of the bevel gear 1 are respectively connected to the side straightening drive components.

[0012] Preferably, the edge-straightening drive assembly includes a reciprocating screw rod that is transmission-connected to a bevel gear on the same side, the reciprocating screw rod is rotationally connected to the inner surface of a reciprocating groove on the same side, the outer surface of the reciprocating screw rod is threadedly connected to a thread block, the outer surface of the thread block is slidingly connected to the inner surface of the reciprocating groove, the inner surface of the thread block is slidingly connected to a push rod, the lower end of the push rod is slidingly connected to the inner surface of the arc groove via a limiting shaft, and the end of the push rod away from the thread block is tightly attached to the edge-straightening assembly.

[0013] Preferably, the edge straightening assembly includes two sliders 2 that are symmetrically distributed front and back and slidably connected to the inner surfaces of adjacent slide grooves, the two sliders 2 are fixedly connected to a compression spring 2 fixedly connected to the inner wall of the slide groove on one side away from the positioning assembly, the upper ends of the two sliders 2 are commonly fixedly connected to an L-shaped plate slidably connected to the upper end of the machine platform, a plurality of limit grooves are linearly distributed on the lower end of the horizontal part of the L-shaped plate, the inner surfaces of several of the limit grooves are slidably connected to sliders 1, the sides of several sliders 1 away from the positioning assembly are fixedly connected to a compression spring 1 fixedly connected to the inner wall of the limit groove, the lower ends of several of the sliders are rotatably connected to a roller 1 that is tightly attached to the upper end of the machine platform, and the end of the vertical part of the L-shaped plate away from the positioning assembly is tightly attached to the push rod.

[0014] Preferably, the conveying structure includes two reciprocating screws rotatably connected to the lower part of the inner surface of the machine and transmission connected to the output end of the driving motor, the upper part of the inner surface of the machine is symmetrically provided with conveying guide grooves, the lower part of the inner surface of the machine is symmetrically provided with straight grooves, the outer surface of the second reciprocating screw is threadedly connected with a conveying component that is slidably connected to the conveying guide grooves on both sides and the inner surface of the straight grooves, and the rear end of the second reciprocating screw is transmission connected to the second bevel gear.

[0015] Preferably, the conveying assembly includes a threaded block 2 which is slidably connected to the inner surfaces of the straight grooves on both sides, the inner surface of the threaded block 2 is threadedly connected to the outer surface of the reciprocating screw 2, the upper end of the threaded block 2 is fixedly connected to a compression spring 3 and a telescopic limit rod sleeved on the outer surface of the compression spring 3, the upper ends of the telescopic limit rod and the compression spring 3 are commonly fixedly connected to a lifting seat, the left and right ends of the lifting seat are fixedly connected to a rated roller 2 which is slidably connected to the inner surface of the conveying guide groove, the front and rear ends of the lifting seat are fixedly connected to negative pressure suction cups, the inner cavity of the lifting seat is installed with a vacuum pump connected to the negative pressure suction cups on both sides, and the upper end of the lifting seat is installed with a contact sensor connected to the vacuum pump through a signal line.

[0016] Preferably, the conveying guide groove includes a horizontal reset portion, a lifting portion inclined upward and then folded horizontally is provided at the front of the reset portion, the reset portion and the rear of the lifting portion are connected by a smooth arc groove, and a one-way flap is rotatably connected at the connection between the reset portion and the rear of the lifting portion, the one-way flap is colinear with the inclined portion of the lifting portion and its lower side overlaps with the bottom wall of the reset portion.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention drives the rubber wheel to rotate through a feeding motor, and utilizes the friction between the rubber wheel and the circuit board to drive the circuit board to slide outward along the discharge port, and fall on the machine table and within the operating range of the edge positioning structure. At the same time, the front and rear positions of the circuit board are positioned and adjusted under the action of the driving motor through the cooperation of the positioning component and the reciprocating screw rod 2, and the edge driving component is driven to move synchronously through the cooperation of the positioning component and the edge driving component, thereby pushing the edge driving component to approach the circuit board, thereby positioning the left and right sides of the circuit board to ensure the accurate position of the circuit board, and at the same time, the circuit board that has been positioned is sent to the next process under the restriction of the conveying guide groove through the cooperation of the reciprocating screw rod 2 and the conveying component, and continuous feeding is achieved through the action of the reciprocating screw rod 2 and the conveying guide groove.

[0019] 2. The present invention utilizes the cooperation between the conveyor belt and the front stopper to drive the conveyor belt to move when the circuit board is on the upper side of the conveyor belt, thereby driving the circuit board to move toward the front stopper, thereby positioning the circuit board in the front-to-back direction and ensuring that its longitudinal position is in a predetermined state. At the same time, the transmission shaft and the bevel gear 1 are used to synchronously drive the side trimming drive components on both sides to move, thereby positioning the left and right sides of the circuit board.

[0020] 3. The present invention utilizes a pair of bevel gears to drive the reciprocating screw one to rotate, and thereby utilizes the reciprocating screw one to drive the threaded block one to slide in the reciprocating slide groove. At this time, the push rod sliding with the threaded block one will move back and forth due to the action of the threaded block one, but at the same time it is restricted by the arc groove, and an arc-shaped running trajectory will appear. At this time, the L-shaped plate tightly attached to the push rod is affected by the push rod trajectory, and a trajectory gradually approaches the middle of the machine and then moves away, thereby positioning the lateral position of the circuit board by clamping.

[0021] 4. The present invention utilizes the action of the reciprocating screw rod to drive the threaded block to slide in the straight groove, thereby driving the upper support seat to circulate in the inner cavity of the machine under the cooperation of the roller wheel and the conveying guide groove, and lifts the positioned circuit board at the rear and sends it to the front processing station or the conveyor belt of the next process. At the same time, the reset part is used to guide the support seat to reset, so as to realize continuous cyclic feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the feeding structure of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the edge positioning structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the conveying structure of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the edge straightening drive assembly of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the edge trimming assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the connection relationship between the positioning assembly and the edge straightening driving assembly of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the positioning assembly of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the conveying assembly of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the conveying guide groove of the present invention;

[0032] Fig.11 It is a schematic diagram of the cross-sectional structure of the conveying guide groove of the present invention.

[0033] In the figure: 1, machine table; 2, edge trimming positioning structure; 21, edge trimming assembly; 211, L-shaped plate; 212, limit groove; 213, slider 1; 214, roller 1; 215, compression spring 1; 216, slider 2; 217, compression spring 2; 22, slide 1; 23, arc groove; 24, edge trimming drive assembly; 241, reciprocating screw 1; 242, thread block 1; 243, push rod; 25, positioning assembly; 251, conveyor belt; 252, transmission shaft; 253, bevel gear 1; 254, bevel gear 2; 255, front stopper ; 256, rear block; 26, reciprocating slide; 3, feeding structure; 31, storage box; 32, discharge port; 33, support platform; 34, feeding motor; 35, rubber wheel; 4, conveying structure; 41, reciprocating screw rod 2; 42, conveying assembly; 421, threaded block 2; 422, telescopic limit rod; 423, compression spring 3; 424, roller 2; 425, lifting seat; 426, negative pressure suction cup; 43, conveying guide groove; 431, reset part; 432, lifting part; 433, one-way flap; 44, straight groove; 5, driving motor. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1, as Figure 1As shown, an automatic edge alignment device for circuit boards includes a machine table 1, a conveying structure 4 is arranged in the inner cavity of the machine table 1, a driving motor 5 which is transmission-connected to the conveying structure 4 is fixedly connected to the lower front end of the machine table 1, an edge alignment positioning structure 2 is symmetrically arranged at the rear of the upper end of the machine table 1, the rear side of the conveying structure 4 is transmission-connected to the edge alignment positioning structure 2 through a transmission belt, a feeding structure 3 which is overlapped with the upper end of the machine table 1 is fixedly connected to the upper rear end of the machine table 1, and the feeding structure 3 is located directly behind the edge alignment positioning structure 2.

[0036] Further, to realize the automatic feeding function, refer to Figure 2 The feeding structure 3 includes a support platform 33 fixedly connected to the upper rear end of the machine 1, and a storage box 31 is fixedly connected to the upper end of the support platform 33 and the rear of the upper end of the machine 1. A discharge port 32 connected to the inner cavity of the storage box 31 is provided at the lower front end. A feeding motor 34 is fixedly installed at the rear of the upper end of the machine 1 through a bracket, and a rubber wheel 35 is fixedly connected to the output end of the feeding motor 34. A slot with the same width as the rubber wheel 35 is provided at the lower end of the storage box 31, and the upper outer surface of the rubber wheel 35 is flush with the bottom wall of the inner cavity of the storage box 31.

[0037] Circuit boards are stored in the storage box 31. When the feeding motor 34 drives the rubber wheel 35 to rotate, the friction between the rubber wheel 35 and the circuit board can drive the circuit board to slide outward along the discharge port 32 and fall above the machine table 1 and within the operating range of the edge positioning structure 2.

[0038] Further, to achieve the whole edge positioning of the circuit board, refer to Figure 3 The edge straightening positioning structure 2 includes some positioning components 25 arranged in the middle of the inner surface of the machine table 1 away from the conveying structure 4, a reciprocating slide groove 26 is provided on the side of the upper end of the machine table 1 away from the conveying structure 4, an arc groove 23 is provided on the part of the upper end of the machine table 1 between the positioning component 25 and the reciprocating slide groove 26, and a slide groove 22 is symmetrically provided front and back along the central axis of the arc groove 23 on the upper end of the machine table 1, and an edge straightening component 21 tightly attached to the edge straightening drive component 24 is commonly provided on the inner surfaces of the two slide grooves 22.

[0039] The positioning assembly 25 follows the conveying structure 4 to transport the circuit board backwards and positions it through the rear stopper 256. The front stopper 255 at the front is used to prevent the feeding structure 3 from over-feeding and to limit the maximum running track of the circuit board when it enters.

[0040] At the same time, the edge straightening drive components 24 on both sides follow the action of the positioning component 25 and move synchronously, driving the edge straightening component 21 to approach the circuit board. At this time, the edge straightening component 21 is clamped inward from both sides to position and straighten the two sides of the circuit board.

[0041] Furthermore, in order to realize the conveying of the circuit board after edge alignment and positioning to the next process or processing station, refer to Figure 4 The conveying structure 4 includes a reciprocating screw rod 41 which is rotatably connected to the lower part of the inner surface of the machine table 1 and is transmission-connected to the output end of the driving motor 5. A conveying guide groove 43 is symmetrically opened on the upper part of the inner surface of the machine table 1, and a straight groove 44 is symmetrically opened on the lower part of the inner surface of the machine table 1. The outer surface of the reciprocating screw rod 41 is threadedly connected with a conveying component 42 which is slidably connected to the inner surfaces of the conveying guide grooves 43 and the straight grooves 44 on both sides. The rear end of the reciprocating screw rod 41 is transmission-connected to the bevel gear 254.

[0042] The reciprocating screw rod 41 rotates under the action of the driving motor 5, thereby driving the conveying assembly 42 to slide in the straight groove 44 and the conveying guide groove 43. Under the guidance of the conveying guide groove 43, the conveying assembly 42 is used to suck and lift the circuit board that has been trimmed on the inner side of the trimming positioning structure 2, and send it to the next process or processing station. The reciprocating screw rod 41 performs a cyclic action to achieve continuous feeding.

[0043] During the operation of this embodiment, the rubber wheel 35 is driven to rotate by the feeding motor 34, and the friction between the rubber wheel 35 and the circuit board is used to drive the circuit board to slide outward along the discharge port 32 and fall above the machine table 1 and within the operating range of the edge positioning structure 2. At the same time, the front and rear positions of the circuit board are positioned and adjusted by the cooperation of the positioning component 25 and the reciprocating screw rod 41 under the action of the drive motor 5, and the edge driving component 24 is driven to move by the cooperation of the positioning component 25 and the edge driving component 24, thereby pushing the edge driving component 21 to approach the circuit board, thereby positioning the left and right sides of the circuit board to ensure the accurate position of the circuit board, and at the same time, the circuit board that has been positioned is sent to the next process under the restriction of the conveying guide groove 43 through the cooperation of the reciprocating screw rod 41 and the conveying component 42, and continuous feeding is achieved through the action of the reciprocating screw rod 41 and the conveying guide groove 43.

[0044] Embodiment 2: Based on embodiment 1, this embodiment uses the cooperation between the conveying belt 251 and the front stopper 255. When the circuit board is on the upper side of the conveying belt 251, the conveying structure 4 is used to drive the conveying belt 251 to move, and drive the circuit board to move toward the front stopper 255, so as to position the circuit board in the front and rear directions and ensure that its longitudinal position is in a predetermined state. At the same time, the transmission shaft 252 and the bevel gear 253 are used to synchronously drive the edge straightening drive components 24 on both sides to move, so as to position the left and right sides of the circuit board.

[0045] Specifically, to achieve the positioning of the circuit board, refer to Figure 5 , Figure 7 and Figure 8The positioning assembly 25 includes a conveyor belt 251 installed on the inner surface of the machine 1, and the two supporting shafts of the conveyor belt 251 are rotatably connected to the inner surface of the machine 1. A front stopper 255 is fixedly connected to the front of one side of the upper end of the machine 1 close to the conveyor belt 251, and a rear stopper 256 is fixedly connected to the rear of one side of the upper end of the machine 1 close to the conveyor belt 251. The rear stopper 256 is located on the lower front side of the storage box 31 and a relay wheel is rotatably connected to its upper end.

[0046] Further, in order to achieve the following action frequency of the conveying structure 4 and drive the edge straightening drive assembly 24 to move, refer to Figure 7 The conveying belt 251 is fixedly connected to the inner surface of the support shaft at the front with a transmission shaft 252, and a bevel gear 254 is fixedly installed in the middle of the outer surface of the transmission shaft 252. The output end of the bevel gear 254 is connected to the conveying structure 4 through a transmission belt, and the left and right ends of the transmission shaft 252 are symmetrically fixedly connected with bevel gears 1 253, and the output ends of the two bevel gears 1 253 are respectively connected to the side trimming drive components 24.

[0047] The reciprocating screw rod 241 is driven by the belt and the bevel gear 254, and the bevel gear 254 drives the transmission shaft 252 to rotate. The transmission shaft 252 is connected to the conveyor belt 251, thereby driving the conveyor belt 251 to operate. When the circuit board slides out of the storage box 31 and falls on the upper side of the machine 1, its lower end fits with the upper end of the conveyor belt 251, and the front end is blocked by the front stopper 255. When the conveyor belt 251 operates, it will synchronously drive the circuit board to move backward until its rear end fits with the two front stops 255, and its longitudinal position is determined, completing the longitudinal positioning.

[0048] Among them, the relay wheel can prevent the upper end of the front stopper 255 from scratching the circuit board, and the bevel gear 1 253 and the bevel gear 2 254 are both composed of two mutually meshing bevel gears, which can change the direction of rotation and realize vertical transmission. Its operating principle has been widely used in the prior art and is a mature transmission means. In the present invention, its detailed structure and operating principle will not be displayed or repeated.

[0049] Embodiment 3: Based on embodiment 2, this embodiment further utilizes the transmission of the reciprocating screw rod 241 by the bevel gear 253 to drive the reciprocating screw rod 241 to rotate, and thereby utilizes the reciprocating screw rod 241 to drive the threaded block 242 to slide in the reciprocating slide groove 26. At this time, the push rod 243 sliding with the threaded block 242 will move back and forth due to the action of the threaded block 242, but at the same time it is restricted by the arc groove 23, and an arc-shaped running trajectory will appear. At this time, the L-shaped plate 211 tightly attached to the push rod 243 is affected by the trajectory of the push rod 243, and a trajectory gradually approaches the middle of the machine 1 and then moves away, thereby positioning the lateral position of the circuit board by clamping.

[0050] Specifically, in order to realize the driving of the edge trimming component 21 to perform edge trimming and positioning of the circuit board, refer to Figure 5 and Figure 7 The edge straightening drive assembly 24 includes a reciprocating screw rod 241 that is transmission-connected to the bevel gear 253 on the same side. The reciprocating screw rod 241 is rotationally connected to the inner surface of the reciprocating slide groove 26 on the same side. The outer surface of the reciprocating screw rod 241 is threadedly connected to a thread block 242. The outer surface of the thread block 242 is slidingly connected to the inner surface of the reciprocating slide groove 26. The inner surface of the thread block 242 is slidingly connected to a push rod 243. The lower end of the push rod 243 is slidingly connected to the inner surface of the arc groove 23 through a limiting shaft. The end of the push rod 243 away from the thread block 242 is tightly attached to the edge straightening assembly 21.

[0051] The reciprocating screw rod 241 rotates following the action of the bevel gear 253, thereby driving the threaded block 242 to slide in the reciprocating slide groove 26. In the initial position, the threaded block 242 is at the rear side of the reciprocating screw rod 241. When the reciprocating screw rod 241 rotates, the threaded block 242 will first slide forward. At this time, the push rod 243 will push the edge straightening component 21 to the middle of the machine table 1 under the limit of the arc groove 23. At this time, the edge straightening component 21 will position and clamp the circuit board. When the conveying component 42 moves to the front of the conveying guide groove 43, the push rod 243 passes over the arc groove 23 and is closest to the conveying component 42. Before the conveying component 42 moves upward under the guidance of the conveying guide groove 43 to lift the circuit board, the edge straightening component 21 has left the edge of the circuit board and will not affect the lifting action of the conveying component 42.

[0052] Further, in order to realize the trimming of the edge position of the circuit board from both sides, refer to Figure 5 and Figure 6 The edge straightening component 21 includes two sliders 216 symmetrically distributed front and back and slidably connected to the inner surfaces of adjacent slide grooves 22. The two sliders 216 are fixedly connected to the inner wall of the slide groove 22 on one side away from the positioning component 25. The upper ends of the two sliders 216 are commonly fixedly connected to an L-shaped plate 211 slidably connected to the upper end of the machine table 1. A plurality of limiting grooves 212 are linearly distributed at the lower end of the horizontal part of the L-shaped plate 211. The inner surfaces of the plurality of limiting grooves 212 are slidably connected to sliders 213. The plurality of sliders 213 are fixedly connected to the inner wall of the limiting groove 212 on one side away from the positioning component 25. The lower ends of the plurality of sliders 213 are rotatably connected to a roller 214 tightly attached to the upper end of the machine table 1. The end of the vertical part of the L-shaped plate 211 away from the positioning component 25 is tightly attached to the push rod 243.

[0053] When the L-shaped plate 211 approaches the circuit board under the action of the push rod 243, the roller 214 on the inside thereof will first contact the edge of the circuit board, and compress the compression spring 215 through the slider 213, and give the same reaction force to the left and right edges of the circuit board. Since the movement amplitudes of the L-shaped plates 211 on both sides are consistent, the forces on both sides of the circuit board will gradually tend to be consistent, thereby prompting the circuit board to move to the predetermined position. Since the roller 214 is rotatable, it will not affect the action of the positioning component 25 while clamping, thereby positioning the circuit board in both the horizontal and vertical directions.

[0054] Embodiment 4: Based on embodiment 3, this embodiment utilizes the action of reciprocating screw rod 2 41 to drive threaded block 2 421 to slide in straight groove 44, thereby driving the upper support seat 425 to circulate in the inner cavity of machine table 1 under the cooperation of roller 2 424 and conveying guide groove 43, and lifts the positioned circuit board at the rear and sends it to the front processing station or the conveyor belt of the next process, and at the same time utilizes the action of reset portion 431 to guide the support seat 425 to reset, so as to realize continuous cyclic feeding.

[0055] Specifically, in order to drive the circuit board to move to the next process or processing station, refer to Fig. 9 The conveying component 42 includes a threaded block 421 that is slidably connected to the inner surfaces of the straight grooves 44 on both sides. The inner surface of the threaded block 421 is threadedly connected to the outer surface of the reciprocating screw rod 41. The upper end of the threaded block 421 is fixedly connected to a compression spring 3 423 and a telescopic limit rod 422 sleeved on the outer surface of the compression spring 3 423. The upper ends of the telescopic limit rod 422 and the compression spring 3 423 are commonly fixedly connected to a lifting seat 425. The left and right ends of the lifting seat 425 are fixedly connected to a rated roller 424 that is slidably connected to the inner surface of the conveying guide groove 43. The front and rear ends of the lifting seat 425 are fixedly connected to negative pressure suction cups 426. The inner cavity of the lifting seat 425 is equipped with a vacuum pump connected to the negative pressure suction cups 426 on both sides. The upper end of the lifting seat 425 is equipped with a contact sensor connected to the vacuum pump through a signal line.

[0056] The threaded block 2 421 slides in the conveying guide groove 43 and can move horizontally in a circular motion under the action of the reciprocating screw rod 2 41. The compression spring 3 423 can only be extended and retracted but cannot be rotated, and can limit the upper supporting seat 425. The vacuum pump installed in the supporting seat 425 is a miniature vacuum pump in the prior art, which can extract the air in the negative pressure suction cup 426 so that when it is attached to the circuit board, it can be adsorbed on the circuit board. The suction force is limited to the circuit board and will not move due to the conveying inertia. When the supporting seat 425 descends under the guidance of the conveying guide groove 43, the circuit board will be released.

[0057] Further, in order to guide the conveying assembly 42 to lift the circuit board and send it to the next process or processing station, and to guide the conveying assembly 42 to reset, and to ensure the singleness of its running trajectory, refer to Fig.10 and Fig.11 The conveying guide groove 43 includes a horizontal reset portion 431, and a lifting portion 432 that is inclined upward and then folded horizontally is provided in the front of the reset portion 431. The reset portion 431 and the lifting portion 432 are connected at the rear by a smooth arc groove. The reset portion 431 and the lifting portion 432 are rotatably connected at the connection between the rear of the lifting portion 432 and a one-way flap 433. The one-way flap 433 is colinear with the inclined portion of the lifting portion 432 and its lower side overlaps with the bottom wall of the reset portion 431.

[0058] When the second roller 424 is at the front, it is at the head of the reset part 431. When the reciprocating screw rod 41 rotates through the second threaded block 421 to drive the lifting seat 425 to move, the second roller 424 rises along the one-way flap 433 and enters the lifting part 432. At this time, the lifting seat 425 and the negative pressure suction cup 426 lift the circuit board. The second roller 424 moves forward through the lifting part 432 and enters the processing station or the conveyor belt vacuum pump suction force disappears to place the positioned circuit board at the predetermined position.

[0059] The second roller 424 moves downward from the arc area of ​​the conveying guide groove 43 into the reset portion 431 and moves backward until it passes through the one-way flap 433, lifts the one-way flap 433, and passes over the one-way flap 433 to enter the front of the reset portion 431.

[0060] It should be specially noted that the above-mentioned vacuum pump, contact sensor and negative pressure suction cup 426 are conventional technical means in the prior art, wherein the vacuum pump is controlled by the contact sensor. When the contact sensor is blocked by the circuit board, a signal is sent, and the vacuum pump extracts the air between the negative pressure suction cup 426 and the circuit board, causing the negative pressure suction cup 426 to be adsorbed on the circuit board, thereby lifting the circuit board and conveying it forward. However, the vacuum pump does not work continuously, but works at a fixed time. When the circuit board is at the front of the upper end of the machine 1 and the roller 2 424 is in the arc area of ​​the conveying guide groove 43, the suction disappears. This structure has been widely used in the prior art. In the present invention, it is only used to realize the function of stably conveying circuit boards, and its internal structure, operating principle, wiring, and control method are not described in detail.

[0061] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to 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 device for automatic edge alignment of a circuit board, comprising a machine platform (1), characterized in that: The inner cavity of the machine (1) is provided with a conveying structure (4); the lower front end of the machine (1) is fixedly connected to a driving motor (5) which is transmission-connected to the conveying structure (4); the rear upper end of the machine (1) is symmetrically provided with an edge-straightening positioning structure (2); the rear side of the conveying structure (4) is transmission-connected to the edge-straightening positioning structure (2) via a transmission belt; the upper rear end of the machine (1) is fixedly connected to a feeding structure (3) which overlaps the upper end of the machine (1); and the feeding structure (3) is located directly behind the edge-straightening positioning structure (2).

2. The automatic edge alignment device for circuit boards according to claim 1, characterized in that: The feeding structure (3) comprises a support platform (33) fixedly connected to the upper rear end of the machine platform (1); the upper end of the support platform (33) and the rear upper end of the machine platform (1) are fixedly connected to a material storage box (31); the lower front end of the material storage box (31) is provided with a discharge port (32) communicating with the inner cavity thereof; the rear upper end of the machine platform (1) is fixedly mounted with a feeding motor (34) via a bracket; the output end of the feeding motor (34) is fixedly connected to a rubber wheel (35); the lower end of the material storage box (31) is provided with a slot having the same width as the rubber wheel (35); the upper outer surface of the rubber wheel (35) is flush with the bottom wall of the inner cavity of the material storage box (31).

3. The automatic edge alignment device for circuit boards according to claim 2, characterized in that: The edge straightening positioning structure (2) comprises a plurality of positioning components (25) arranged in the middle of the inner surface of the machine (1) away from the conveying structure (4); a reciprocating slide groove (26) is provided on the side of the upper end of the machine (1) away from the conveying structure (4); an arc groove (23) is provided on the portion of the upper end of the machine (1) located between the positioning component (25) and the reciprocating slide groove (26); a slide groove (22) is symmetrically provided on the upper end of the machine (1) along the central axis of the arc groove (23); and an edge straightening component (21) in close contact with the edge straightening drive component (24) is provided on the inner surfaces of the two slide grooves (22).

4. The automatic edge alignment device for circuit boards according to claim 3, characterized in that: The positioning assembly (25) comprises a conveyor belt (251) mounted on the inner surface of the machine (1); two support shafts of the conveyor belt (251) are rotatably connected to the inner surface of the machine (1); a front stopper (255) is fixedly connected to the front of one side of the upper end of the machine (1) close to the conveyor belt (251); a rear stopper (256) is fixedly connected to the rear of one side of the upper end of the machine (1) close to the conveyor belt (251); the rear stopper (256) is located at the lower front side of the material storage box (31) and a relay wheel is rotatably connected to the upper end thereof.

5. The automatic edge alignment device for circuit boards according to claim 4, characterized in that: The inner surface of the support shaft of the conveying belt (251) located at the front is fixedly connected to a transmission shaft (252), and a bevel gear 2 (254) is fixedly installed in the middle of the outer surface of the transmission shaft (252). The output end of the bevel gear 2 (254) is connected to the conveying structure (4) through a transmission belt. The left and right ends of the transmission shaft (252) are symmetrically fixedly connected to bevel gears 1 (253), and the output ends of the two bevel gears 1 (253) are respectively connected to the side trimming drive components (24).

6. The automatic edge alignment device for circuit boards according to claim 5, characterized in that: The edge straightening drive assembly (24) comprises a reciprocating screw rod (241) which is transmission-connected to a bevel gear (253) on the same side; the reciprocating screw rod (241) is rotationally connected to the inner surface of a reciprocating groove (26) on the same side; the outer surface of the reciprocating screw rod (241) is threadedly connected to a thread block (242); the outer surface of the thread block (242) is slidably connected to the inner surface of the reciprocating groove (26); the inner surface of the thread block (242) is slidably connected to a push rod (243); the lower end of the push rod (243) is slidably connected to the inner surface of the arc groove (23) via a limiting shaft; the end of the push rod (243) away from the thread block (242) is in close contact with the edge straightening assembly (21).

7. The automatic edge alignment device for circuit boards according to claim 6, characterized in that: The edge straightening component (21) comprises two sliding blocks (216) symmetrically distributed front and rear and slidably connected to the inner surfaces of adjacent sliding grooves (22); the two sliding blocks (216) are fixedly connected to the inner wall of the sliding groove (22) on one side away from the positioning component (25); the upper ends of the two sliding blocks (216) are commonly fixedly connected to an L-shaped plate (211) slidably connected to the upper end of the machine platform (1); the lower end of the horizontal part of the L-shaped plate (211) is linearly distributed with a plurality of limiting springs. The inner surfaces of the plurality of limit grooves (212) are slidably connected to sliders (213); the sides of the plurality of sliders (213) away from the positioning assembly (25) are fixedly connected to compression springs (215) fixedly connected to the inner wall of the limit groove (212); the lower ends of the plurality of sliders (213) are rotatably connected to rollers (214) tightly attached to the upper end of the machine platform (1); and the end of the vertical portion of the L-shaped plate (211) away from the positioning assembly (25) is tightly attached to the push rod (243).

8. The automatic edge alignment device for circuit boards according to claim 5, characterized in that: The conveying structure (4) comprises a reciprocating screw rod (41) which is rotatably connected to the lower part of the inner surface of the machine platform (1) and is transmission-connected to the output end of the driving motor (5); a conveying guide groove (43) is symmetrically provided on the upper part of the inner surface of the machine platform (1); a straight groove (44) is symmetrically provided on the lower part of the inner surface of the machine platform (1); a conveying assembly (42) which is slidably connected to the inner surfaces of the conveying guide grooves (43) and the straight grooves (44) on both sides is threadedly connected on the outer surface of the reciprocating screw rod (41); and a rear end of the reciprocating screw rod (41) is transmission-connected to a bevel gear (254).

9. The automatic edge alignment device for circuit boards according to claim 8, characterized in that: The conveying assembly (42) comprises a second threaded block (421) slidably connected to the inner surfaces of the straight grooves (44) on both sides, the inner surface of the second threaded block (421) being threadedly connected to the outer surface of the second reciprocating screw rod (41), the upper end of the second threaded block (421) being fixedly connected to a third compression spring (423) and a telescopic limit rod (422) sleeved on the outer surface of the third compression spring (423), the telescopic limit rod (422) and the upper ends of the third compression spring (423) being fixedly connected together. A lifting seat (425) is fixedly connected, and the left and right ends of the lifting seat (425) are fixedly connected to the rated roller two (424) which is slidably connected to the inner surface of the conveying guide groove (43), and the front and rear ends of the lifting seat (425) are fixedly connected to the negative pressure suction cup (426), and the inner cavity of the lifting seat (425) is installed with a vacuum pump connected to the negative pressure suction cups (426) on both sides, and the upper end of the lifting seat (425) is installed with a contact sensor connected to the vacuum pump through a signal line.

10. The automatic edge alignment device for circuit boards according to claim 9, characterized in that: The conveying guide groove (43) includes a horizontal reset portion (431), the front portion of the reset portion (431) is provided with a lifting portion (432) which is inclined upward and then folded horizontally, the rear portions of the reset portion (431) and the lifting portion (432) are connected by a smooth arc groove, and the connection between the reset portion (431) and the rear portion of the lifting portion (432) is rotatably connected with a one-way flap (433), the one-way flap (433) is colinear with the inclined portion of the lifting portion (432) and its lower side overlaps with the bottom wall of the reset portion (431).

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