Roller-type circuit board conveying mechanism

Abstract

The utility model discloses a kind of roller type circuit board conveying mechanisms, including support seat, the quantity of support seat setting is two, several transmission shafts are rotatably connected between two support seats, the surface of transmission shaft is fixedly installed with several rollers, the front end of support seat is fixedly connected with vertical plate, the opposite end of two vertical plates set left and right is fixedly connected with fixed base symmetrically, the end of fixed base away from vertical plate extends to the front side of roller.The roller type circuit board conveying mechanism, the buffer plate fixed outside movable plate of one end of fixed base, its inboard fixed guide plate is directly attached with circuit board side edge:when circuit board is conveyed under the drive of roller, two sides guide plate forms linear limit passage consistent with conveying direction, can directly constrain the lateral displacement range of circuit board, lateral can offset the offset force generated by inertia of circuit board, lateral can avoid left and right shaking of circuit board with uneven rotation speed of roller.

Description

Technical Field

[0001] This utility model relates to the field of conveying mechanism technology, specifically a roller-type circuit board conveying mechanism. Background Technology

[0002] In the circuit board manufacturing process, the roller conveyor mechanism is the core equipment for realizing the continuous transfer of circuit boards and connecting various processing steps. Its operational stability directly affects the processing efficiency and yield of the circuit boards.

[0003] Existing devices lack stable limiting protection for the sides of the circuit boards, relying solely on the friction of rollers to transport them. When the conveyor operates at high speed or the circuit board itself is narrow, the circuit board is susceptible to lateral movement due to inertial forces and uneven roller speeds. This movement can cause the circuit board to collide with adjacent boards, resulting in stacking, or it can fall directly from the sides of the conveyor, damaging the solder pads and causing components to fall off. Although some devices have added simple baffles, these baffles are fixed in height and lack a buffer structure. When the circuit board collides with the baffle, it is prone to rigid impact, causing the edges and corners of the circuit board to crack. This impact damage is particularly noticeable for thin, high-precision circuit boards, directly affecting product yield. Utility Model Content

[0004] The purpose of this utility model is to provide a roller-type circuit board conveying mechanism to solve the problems mentioned in the background art, namely, that existing devices do not have stable limiting protection for the sides of the circuit board and rely solely on the friction of the rollers to drive the circuit board. When the conveying mechanism is running at high speed or the width of the circuit board itself is small, the circuit board is easily affected by factors such as inertial force and uneven roller speed, resulting in lateral movement. The moving circuit board may collide with adjacent circuit boards, causing stacking, or fall directly from both sides of the conveying mechanism, causing damage to the solder pads on the surface of the circuit board and component detachment. Although some devices add simple baffles, the height of the baffles is fixed and there is no buffer structure. When the circuit board collides with the baffle, it is easy to generate rigid impact, causing the corners of the circuit board to crack. This impact damage is more obvious for thin, high-precision circuit boards, directly affecting the product yield.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a roller-type circuit board conveying mechanism, including a support base, wherein two support bases are provided, and a plurality of transmission shafts are rotatably connected between the two support bases. A plurality of rollers are fixedly installed on the surface of the transmission shafts. A vertical plate is fixedly connected to the front end of the support base. Fixed bases are symmetrically fixedly connected to the opposite ends of the two vertical plates provided on the left and right. The end of the fixed base away from the vertical plate extends to the front side of the rollers. A movable groove is provided at the center position of one end of the fixed base. Moving grooves are provided at the top, center and bottom positions of the inner wall of one side of the movable groove of the fixed base. Moving blocks are slidably connected inside the moving grooves. An inner groove is provided on one side of the moving block. A push rod is slidably connected inside the inner groove. One side of the push rod passes through the moving block and the fixed base in sequence and extends to the outside of the fixed base. The other side of the three moving blocks passes through the inside of the movable grooves and is fixedly connected to a movable plate. A buffer plate is fixedly connected to one side of the movable plate. A guide plate is fixedly connected to one side of the buffer plate.

[0006] Compared with the prior art, the beneficial effects of this utility model are: This roller-type circuit board conveying mechanism uses a buffer plate fixed to the outside of a movable plate at one end of a fixed base, with a guide plate fixed to the inside of the buffer plate directly abutting the side of the circuit board. When the circuit board is conveyed by the rollers, the guide plates on both sides form a linear limiting channel consistent with the conveying direction, which can directly constrain the lateral displacement range of the circuit board. Laterally, it can counteract the offset force caused by the inertia of the circuit board and prevent the circuit board from swaying left and right due to uneven roller speed. It completely blocks the path of the circuit board colliding with adjacent circuit boards and stacking them, while preventing the circuit board from falling through the gap between the two support bases, avoiding damage to the solder pads on the circuit board surface and the falling off of components, thus ensuring the safe conveying of high-precision circuit boards. The device features four cylinders fixed to the side of the mounting base. Their output ends are connected to a limiting plate via connecting rods. One side of three push rods is fixed to the limiting plate. Based on the difference in circuit board width, the cylinders are activated, pushing or pulling the limiting plate laterally via the connecting rods. The limiting plate then moves the three push rods synchronously, adjusting the initial positions of the moving block, movable plate, and guide plate. The guide plate always fits against the side of the circuit board, and the limiting plate indirectly adapts to the side limiting requirements of circuit boards of different widths by controlling the movement range of the push rods. This design achieves protection for circuit boards of various specifications without changing the guide structure, avoiding the limitation of existing devices that only adapt to a single specification, and significantly expanding the applicable scenarios of the conveying mechanism. Attached Figure Description

[0007] Figure 1 This is a top sectional view of the structure of this utility model; Figure 2 This is a top view of the conveying mechanism of this utility model; Figure 3 This utility model Figure 1 A magnified view of part A in the diagram; Figure 4 This is a three-dimensional structural view of the fixing base of this utility model.

[0008] In the diagram: 1. Support base; 2. Drive shaft; 3. Roller; 4. Variable frequency motor; 5. Main shaft; 6. Driven wheel; 7. Drive belt; 8. Vertical plate; 9. Fixed base; 10. Movable groove; 11. Moving groove; 12. Push rod; 13. Moving block; 14. Inner groove; 15. Spring; 16. Slide groove; 17. Slider; 18. Movable plate; 19. Buffer plate; 20. Guide plate; 21. Sponge ball one; 22. Sponge ball two; 23. Limiting plate; 24. Cylinder; 25. Connecting rod. Detailed Implementation

[0009] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0010] Please see Figure 1-4 This utility model provides a technical solution: a roller-type circuit board conveying mechanism, including a support base 1, of which two support bases 1 are provided. A plurality of drive shafts 2 are rotatably connected between the two support bases 1. A plurality of rollers 3 are fixedly mounted on the surface of the drive shafts 2. A vertical plate 8 is fixedly connected to the front end of the support base 1. Fixed seats 9 are symmetrically fixedly connected to opposite ends of the two vertical plates 8. The end of the fixed seat 9 away from the vertical plate 8 extends to the front side of the rollers 3. A movable groove 10 is formed near the center of one end of the fixed seat 9. A groove is formed near the top of the inner wall of the fixed seat 9 corresponding to the movable groove 10. The three movable blocks 13 are provided at the center and near the bottom. Movable slots 11 are provided inside the movable slots 11. Movable blocks 13 are slidably connected inside the movable slots 11. An inner slot 14 is provided on one side of the movable blocks 13. A push rod 12 is slidably connected inside the inner slot 14. One side of the push rod 12 passes through the movable blocks 13 and the fixed seat 9 and extends to the outside of the fixed seat 9. The other side of the three movable blocks 13 passes through the interior of the movable slots 10 and is fixedly connected to a movable plate 18. The movable plate 18 is a single plate. One side of the movable plate 18 passes through the outside of the movable slots 10 and is fixedly connected to a buffer plate 19. A guide plate 20 is fixedly connected to one side of the buffer plate 19.

[0011] A variable frequency motor 4 is fixedly installed at the top of one end of a support base 1 located on one side. The output end of the variable frequency motor 4 is fixedly connected to a main shaft 5. One side of the main shaft 5 is fixedly connected to one end of a transmission shaft 2 located at the top.

[0012] The other end of the drive shaft 2 extends through to the outside of the support base 1 located on the other side and is fixedly connected to the driven wheel 6. The surface of the driven wheel 6 is connected to the drive belt 7.

[0013] A spring 15 is fixedly connected to the other side of the push rod 12, and one side of the spring 15 is fixedly connected to the inner wall of the inner groove 14.

[0014] The top and bottom of the moving groove 11 are provided with sliding grooves 16. The center of the top and bottom of the moving block 13 is fixedly connected to the slider 17. The side of the slider 17 away from the moving block 13 passes through the interior of the sliding groove 16 and is slidably connected to the sliding groove 16.

[0015] Several sponge balls 1 21 are fixedly connected to one side of the inner wall of the movable groove 10, and several sponge balls 22 are fixedly connected to the other side of the movable plate 18. One side of the sponge ball 22 contacts one side of the sponge ball 1 21. The sponge balls 1 21 and the sponge ball 22 are made of high elastic polyurethane sponge with a compression rate of not less than 50%, ensuring that the movable plate 18 can be smoothly reset after buffering.

[0016] Four cylinders 24 are fixedly installed on the side of the fixed base 9. The output end of the cylinder 24 is fixedly connected to the connecting rod 25. The side of the four connecting rods 25 away from the four cylinders 24 extends through to the outside of the upright plate 8 and is fixedly connected to the limiting plate 23. One side of the three push rods 12 is fixedly connected to the limiting plate 23.

[0017] Working principle: The four cylinders 24 fixed to the side of the fixed base 9 are activated. The output end of the cylinders 24 drives the limiting plate 23 to move laterally through the connecting rod 25. Since one side of the three push rods 12 is fixed to the limiting plate 23, the limiting plate 23 synchronously drives the push rods 12 to move along the moving groove 11 of the fixed base 9. The push rods 12 push the moving block 13 to slide along the moving groove 11. The moving block 13 drives the movable plate 18 to move synchronously. The movable plate 18 pushes the buffer plate 19 and the guide plate 20 to adjust towards or away from the circuit board. During the movement of the moving block 13, the slider 17 fixed at the top and bottom center slides along the slide groove 16 to ensure that the moving block 13, the movable plate 18 and the guide plate 20 always move horizontally until the guide plate 20... The inner side of the circuit board to be conveyed is aligned with the side of the guide plate 20. The cylinder 24 is stopped, and the initial position adjustment of the guide plate 20 is completed to meet the side protection requirements of the current specification circuit board. The variable frequency motor 4 located at the top of one end of the support base 1 is started. The main shaft 5 fixed at the output end of the variable frequency motor 4 drives the top transmission shaft 2 fixed thereto to rotate. The other end of the top transmission shaft 2 passes through the driven wheel 6 fixed to the outside of the other support base 1. Through the transmission belt 7 connected to the surface, the other transmission shafts 2 are driven to rotate synchronously. All the transmission shafts 2 drive the surface-fixed rollers 3 to rotate synchronously, forming a power output along the conveying direction, providing traction for the conveying of the circuit board. The circuit board is placed on top of the rollers 3. The rollers 3 drive the circuit board along the conveying direction through friction. During the movement of the circuit board, the guide plates 20 on both sides form a "linear limiting channel" to constrain the lateral displacement of the circuit board, counteract the offset force caused by the inertia of the circuit board, prevent the circuit board from swaying left and right with the fluctuation of the rotation speed of the roller 3, and prevent the circuit board from colliding with the stacked boards of adjacent circuit boards or falling between the two support seats 1. If the side of the circuit board is squeezed by the conveying fluctuation, the guide plate 20 pushes the movable plate 18 into the movable groove 10 of the fixed seat 9 through the buffer plate 19. The movable plate 18 drives the three movable blocks 13 to slide along the three movable grooves 11. The movable blocks 13 squeeze the push rod 12, causing the spring 15 in the inner groove 14 on one side of the push rod 12 to be compressed. It should be noted that the initial position of the guide plate 20 is adjusted by the cylinder 24. When in operation, spring 15 is in a free state and does not participate in transmission. Only when the circuit board impacts the guide plate 20 is spring 15 compressed to absorb the impact energy. Spring 15 absorbs the impact energy through deformation, weakening the reaction force on the circuit board. At the same time, sponge ball 22 fixed on the other side of the movable plate 18 presses sponge ball 21 fixed on one side of the inner wall of the movable groove 10. The sponge ball further dissipates the residual impact through flexible deformation, avoiding rigid collision between the circuit board and the guide plate 20 and protecting the integrity of the circuit board's edges and corners. After a circuit board is conveyed to the end of the roller 3 and leaves the conveying area, subsequent circuit boards can be placed on top of the roller 3 in sequence, repeating the above power transmission and protective limit process to achieve continuous conveying of batch circuit boards.During the conveying process, if a circuit board of different width is replaced, cylinder 24 can be restarted to repeat the adjustment process in step one, re-adapting the guide plate 20 to its position. No replacement of the protective structure is required. When stopping the conveying, first turn off the variable frequency motor 4, and the drive shaft 2 and roller 3 will gradually stop rotating. After all circuit boards have left the conveying area, cylinder 24 can be adjusted as needed to reset the guide plate 20 to its initial state, preparing it for the next conveying operation.

[0018] In summary: This roller-type circuit board conveying mechanism, through a buffer plate 19 fixed to the outer side of the movable plate 18 at one end of the fixed base 9, and a guide plate 20 fixed to the inner side of the buffer plate 19, directly abuts the side of the circuit board. When the circuit board is conveyed by the roller 3, the guide plates 20 on both sides form a linear limiting channel consistent with the conveying direction, which can directly constrain the lateral displacement range of the circuit board. Laterally, it can counteract the offset force caused by the inertia of the circuit board, and prevent the circuit board from swaying left and right due to uneven rotation speed of the roller 3. It completely blocks the path of the circuit board colliding with the stacked circuit boards, and at the same time prevents the circuit board from falling from the gap between the two support bases 1, avoiding damage to the solder pads on the surface of the circuit board and component detachment, ensuring the safety of high-precision circuit board conveying. The side of the fixed base 9 is fixed. Four cylinders 24 are fixed, and their output ends are connected to the limiting plate 23 via connecting rods 25. One side of the three push rods 12 is fixed to the limiting plate 23. According to the difference in the width of the circuit board, the cylinders 24 are activated. The cylinders 24 push or pull the limiting plate 23 laterally via the connecting rods 25. The limiting plate 23 drives the three push rods 12 to move synchronously, thereby adjusting the initial position of the moving block 13, the movable plate 18 and the guide plate 20. The guide plate 20 always fits against the side of the circuit board. The limiting plate 23 indirectly adapts to the side limiting requirements of circuit boards of different widths by controlling the movement range of the push rods 12. The protection of circuit boards of multiple specifications can be achieved without changing the guide structure, avoiding the limitation of the existing device of "single specification adaptation" and greatly expanding the applicable scenarios of the conveying mechanism.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller-type circuit board conveying mechanism comprising a support base (1), characterized in that: Two support bases (1) are provided, and several transmission shafts (2) are rotatably connected between the two support bases (1). Several rollers (3) are fixedly installed on the surface of the transmission shafts (2). A vertical plate (8) is fixedly connected to the front end of the support base (1). Fixed bases (9) are symmetrically fixedly connected to the opposite ends of the two vertical plates (8) on the left and right. The end of the fixed base (9) away from the vertical plate (8) extends to the front side of the rollers (3). A movable groove (10) is provided at the center position of one end of the fixed base (9). Movable grooves (10) are provided at the top, center and bottom positions of the inner wall of the fixed base (9) corresponding to the movable groove (10). The movable groove (11) has a movable block (13) slidably connected inside. An inner groove (14) is provided on one side of the movable block (13). A push rod (12) is slidably connected inside the inner groove (14). One side of the push rod (12) passes through the movable block (13) and the fixed seat (9) in sequence and extends to the outside of the fixed seat (9). The other side of the three movable blocks (13) passes through the interior of the movable groove (10) and is fixedly connected to a movable plate (18). One side of the movable plate (18) passes through the outside of the movable groove (10) and is fixedly connected to a buffer plate (19). One side of the buffer plate (19) is fixedly connected to a guide plate (20).

2. A roller-type circuit board conveying mechanism according to claim 1, characterized by: A variable frequency motor (4) is fixedly installed at the top of one end of a support base (1) located on one side. The output end of the variable frequency motor (4) is fixedly connected to a main shaft (5). One side of the main shaft (5) is fixedly connected to one end of a transmission shaft (2) located at the top.

3. The roller-type circuit board conveying mechanism according to claim 1, characterized by: The other end of the drive shaft (2) extends through to the outside of the support base (1) located on the other side and is fixedly connected to a driven wheel (6). A drive belt (7) is connected to the surface of the driven wheel (6).

4. The roller-type circuit board conveying mechanism according to claim 1, characterized by: A spring (15) is fixedly connected to the other side of the push rod (12), and one side of the spring (15) is fixedly connected to the inner wall of the inner groove (14).

5. The roller-type circuit board conveying mechanism according to claim 1, characterized by: The top and bottom of the moving groove (11) are provided with sliding grooves (16), and the center of the top and bottom of the moving block (13) is fixedly connected with a slider (17). The side of the slider (17) away from the moving block (13) extends into the interior of the sliding groove (16) and is slidably connected to the sliding groove (16).

6. The roller-type circuit board conveying mechanism according to claim 1, characterized by: A number of sponge balls (21) are fixedly connected to one side of the inner wall of the movable groove (10), and a number of sponge balls (22) are fixedly connected to the other side of the movable plate (18). One side of the sponge ball (22) is in contact with one side of the sponge ball (21).

7. The roller-type circuit board conveying mechanism according to claim 1, characterized by: Four cylinders (24) are fixedly installed on the side of the fixed base (9). The output end of the cylinder (24) is fixedly connected to a connecting rod (25). The side of the four connecting rods (25) away from the four cylinders (24) extends through to the outside of the upright plate (8) and is fixedly connected to a limiting plate (23). One side of the three push rods (12) is fixedly connected to the limiting plate (23).

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