A conveying top pin mechanism of an automatic capping machine

Abstract

The utility model discloses a kind of conveying top pin mechanism of automatic capping machine, including conveying line and the carrier on conveying line transmission and for product loading, the middle below of conveying line is equipped with jacking structure, the position of jacking structure is equipped with blocking cylinder, limiting component and positioning component on conveying line;Jack-up structure includes fixed plate, the middle below of fixed plate is equipped with jacking cylinder, the piston rod of jacking cylinder is passed through fixed plate and is connected with jacking plate upwards, at least two pairs and symmetrically arranged top block are equipped on jacking plate, the side of top block is equipped with upwards protruding and for jacking jacking rod, magnet seat is equipped between top block and jacking plate.The utility model has the beneficial effects that: the quick separation of carrier and cover plate is realized, can adapt to the top pin separation operation between different sizes of carrier and cover plate, jacking is simple, easy;And the structure of this conveying top pin mechanism is simple, through quick change, quick adjustment realizes the conveying of different sizes of carrier, cover plate, top cover.

Description

Technical Field

[0001] This utility model relates to the field of automatic capping machine technology, specifically to a top pin conveying mechanism for an automatic capping machine. Background Technology

[0002] In automated PCB production lines, reflow soldering of PCBs is typically required, necessitating the use of automated capping machines. The workflow of an automated capping machine involves placing the PCB on a carrier, covering it with a cap, inspecting it, and then sending it to the reflow oven for reflow soldering. Finally, the cap is removed, and the entire process is automated, fast, and efficient. However, existing automated capping machines have a relatively simple capping mechanism, only capable of transporting PCBs of fixed sizes. Furthermore, the connection between the carrier and the cap is complex, leading to a complicated separation process, long contact point (CT) time, and an overall complex structure. Summary of the Invention

[0003] The purpose of this invention is to provide a top pin conveying mechanism for an automatic capping machine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a conveying top pin mechanism for an automatic capping machine, comprising a conveyor line and a carrier for loading products on the conveyor line, wherein the conveyor line is a double-row parallel belt line, and a lifting structure is provided in the middle and below the conveyor line, and a blocking cylinder, a limiting component and a positioning component are provided on the conveyor line at the position corresponding to the lifting structure. The lifting structure includes a fixed plate, and a lifting cylinder is provided in the lower middle of the fixed plate. The piston rod of the lifting cylinder passes upward through the fixed plate and is connected to the lifting plate. The lifting plate is provided with at least two pairs of symmetrically arranged top blocks. The top blocks are made of insulating material. The upper side of the top block is provided with an upwardly protruding top rod for lifting. A magnet seat is provided between the top block and the lifting plate. The magnet seat is magnetically connected to the lifting plate. The magnet seat is fixedly connected to the top block. The carrier is provided with multiple clearance grooves that cooperate with the top rod.

[0005] Further optimization involves providing a buffer on the upper side of the top block relative to the inner side of the top rod, which can absorb impact force and provide support.

[0006] In a further optimization, two sets of first guide components are connected between the fixed plate and the lifting plate. The first guide components are used to guide the movement of the lifting plate. The two sets of first guide components are arranged in a rectangular array, and a connecting plate is connected between the lower ends of each set of first guide components.

[0007] Further optimization involves the conveyor line comprising two side-by-side supports. Each support has several horizontally arranged belt conveyor structures along its length, and each support has several flow channel covers over the belt conveyor structures along its length. The conveyor line is formed by the two supports and the belt conveyor structures mounted thereon, facilitating the adjustment of the conveyor line's width.

[0008] In a further optimization, the belt conveyor structure includes a first motor and a first driven pulley mounted on a bracket. The output shaft of the first motor is connected to a first driving pulley, and two first driven pulleys are respectively located on both sides of the first driving pulley. A first belt connects the first driving pulley and the first driven pulleys. The first motor can drive the first driving pulley to rotate, realizing the transmission of the first belt between the first driving pulley and the first driven pulleys.

[0009] Further optimization involves providing a belt support plate along the length of the bracket, positioned in the middle of the first belt, which supports and guides the first belt; a tensioning wheel for adjusting the tension of the first belt is provided between the first driving wheel and the first driven wheel, and an oblong hole for adjusting the position of the tensioning wheel is provided on the bracket, thereby adjusting the position of the tensioning wheel and thus adjusting the tension of the first belt.

[0010] Further optimization involves using two blocking cylinders and four limiting components. The two blocking cylinders and four limiting components are respectively mounted on two supports. Each limiting component includes a limiting plate fixed to the support, and the limiting plate is equipped with height-adjustable limiting screws. The blocking cylinders are used to block and limit the movement of the vehicle; the limiting components are used to limit the upward movement of the vehicle, preventing the vehicle and cover from rising synchronously and becoming unable to separate.

[0011] In a further optimization, the positioning component includes a positioning cylinder horizontally mounted on the conveyor line. The piston rod of the positioning cylinder extends towards the center of the conveyor line and is connected to a push plate. The positioning component is used for positioning the vehicle, and the positioning cylinder drives the push plate to move back and forth to achieve positioning of the vehicle.

[0012] Further optimization involves providing a width adjustment structure on one side of the conveyor line to adjust its conveying width, adapting to the transport of vehicles of different widths. The width adjustment structure includes two support plates arranged along the length of the brackets. A second motor is installed between the two support plates, and a second drive wheel is provided at the output shaft end of the second motor. A second driven wheel is installed on each of the two support plates. A second belt connects the second drive wheel to the two second driven wheels. A ball screw is connected to each of the two second driven wheels. Both ball screws are rotatably connected to the two brackets, and the brackets near the side of the support plates are connected to the nuts of the ball screws.

[0013] In a further optimization, each of the two support plates and the two brackets is connected to a second guide assembly for guiding the movement of the brackets and ensuring smooth adjustment of the width of the conveyor line; the second guide assembly includes a guide rod passing through the two brackets and a linear bearing connected to the bracket near the side of the support plate.

[0014] Beneficial effects: The conveying top pin mechanism of the automatic capping machine of this utility model realizes the conveying of the carrier through the conveyor line, and realizes the lifting structure to lift the magnetically attached cap plate above the carrier, so as to separate it from the carrier; specifically, the lifting cylinder can lift the lifting plate upward, the lifting plate drives the top block and the buffer to rise, the limiting component limits the rise of the carrier, and the top rod lifts the cap plate upward and separates it from the carrier; The magnetic connection between the top block and the lifting plate enables rapid switching of the top block position and rapid replacement of the entire top block, which can adapt to the top pin separation operation between carriers and cover plates of different sizes. The blocking cylinder, positioning component, and limiting component are used to block, position, and limit the carrier, ensuring the accurate position of the carrier and thus ensuring the precise lifting of the cover plate on the carrier; the width adjustment structure enables rapid adjustment of the conveyor width, which can adapt to the conveying of carriers with different widths. The conveying top pin mechanism has a simple structure and can be adapted to the conveying and top-covering of carriers and covers of different sizes through quick change and quick adjustment. The cover lifting is simple and easy, thereby realizing the conveying and top-covering operations of PCB products of different sizes, which can effectively save CT time in the top-covering and product picking processes of PCBs. Attached Figure Description

[0015] Figure 1 This is an isometric structural diagram of the conveying top pin mechanism of the automatic capping machine disclosed in the embodiments of this utility model; Figure 2 This is a top view of the conveying top pin mechanism of the automatic capping machine disclosed in the embodiments of this utility model; Figure 3 This is a schematic diagram of the removal and lifting structure of the conveying top pin mechanism of the automatic capping machine disclosed in the embodiment of this utility model from one perspective. Figure 4 This is an isometric structural diagram of the removal and lifting structure of the conveying top pin mechanism of the automatic capping machine disclosed in this embodiment of the present utility model. Figure 5 This is an isometric structural diagram of the lifting structure disclosed in the embodiments of this utility model; Figure 6 This is a schematic diagram of the carrier and cover plate in the covered state as disclosed in the embodiments of this utility model.

[0016] Figure Labels

[0017] 1-Conveyor line, 11-Support, 12-Belt conveyor structure, 121-First motor, 122-First driving wheel, 123-First driven wheel, 124-First belt, 125-Belt support plate, 126-Tensioning wheel, 13-Flow channel pressure plate, 2-Lifting structure, 21-Fixing plate, 22-Lifting cylinder, 23-Lifting plate, 24-Top block, 241-Top rod, 25-Buffer, 26-Magnet seat, 27-First guide assembly, 28-Connecting plate, 3-Blocking cylinder, 4-Limiting assembly, 41-Limiting plate, 42-Limiting screw, 5-Positioning assembly, 51-Positioning cylinder, 52-Push plate, 6-Carrier, 61-Allowing groove, 7-Width adjustment structure, 71-Support plate, 72-Second motor, 73-Second driving wheel, 74-Second driven wheel, 77-Ball screw, 76-Second guide assembly, 8-Cover plate. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 and Figure 5 , Figure 6 As shown, an automatic capping machine has a conveying top pin mechanism, including a conveyor line 1 and a carrier 6 for loading products on the conveyor line 1. The conveyor line 1 is a double-row parallel belt line, with a lifting structure 2 located in the middle and below. A blocking cylinder 3, a limiting component 4, and a positioning component 5 are provided on the conveyor line 1 at the position corresponding to the lifting structure 2. The lifting structure 2 includes a fixed plate 21. A lifting cylinder 22 is provided in the lower middle of the fixed plate 21. The piston rod of the lifting cylinder 22 passes upward through the fixed plate 21 and is connected to the lifting plate 23. The lifting plate 23 is provided with at least two pairs of symmetrically arranged top blocks 24. The top blocks 24 are made of insulating material. The upper side of the top blocks 24 is provided with an upwardly protruding top rod 241 for lifting. A magnet seat 26 is provided between the top blocks 24 and the lifting plate 23. The magnet seat 26 is magnetically connected to the lifting plate 23. The magnet seat 26 is fixedly connected to the top blocks 24. The carrier 6 is provided with multiple clearance grooves 61 that cooperate with the top rod 241.

[0020] In this embodiment, the conveying top pin mechanism is used in the PCB board soldering process for conveying and covering the PCB board. Conveyor line 1 is used for conveying the carrier 6, which is used for loading the product; that is, the product is conveyed via conveyor line 1. In this embodiment, the product is a PCB board, which is placed on the carrier 6 and sealed by a cover plate 8. The cover plate 8 and the carrier 6 are magnetically connected. The carrier 6 has several mounting holes for magnet embedding, and the cover plate 8 has corresponding magnets. The magnets on the carrier 6 and the cover plate 8 attract each other, achieving a tight connection between the cover plate 8 and the carrier 6, fixing the product between the cover plate 8 and the carrier 6. The lifting structure 2 is used to lift the magnetically attached cover plate 8 above the carrier 6, facilitating the removal of the product between the carrier 6 and the cover plate 8. The blocking cylinder 3 is used to stop the flow of the carrier 6 above the lifting structure 2, ensuring the accurate stopping position of the carrier 6. The limiting component 4 is used to limit the upper part of the carrier 6 to prevent the lifting structure 2 from simultaneously lifting the carrier 6 when lifting the cover plate 8, which would prevent the cover plate 8 from separating from the carrier 6, and consequently cause the carrier 6, the cover plate 8, and the product between them to be lifted simultaneously. The positioning component 5 is used to position the carrier 6 to ensure the accurate front-to-back position of the carrier 6, thereby ensuring the accurate lifting of the cover plate 8 by the lifting structure 2.

[0021] In this embodiment, the lifting structure 2 includes a lifting cylinder 22, a lifting plate 23, and a top block 24. The lifting cylinder 22 can drive the lifting plate 23 to move up and down, and drive the top block 24 to move up and down synchronously. The top rod 241 on the top block 24 can pass through the carrier 6 and hold the cover plate 8. When the top block 24 moves upward, it can lift the cover plate 8 upward, while the carrier 6 is limited by the limiting component 4 at the height position and cannot move upward, thereby separating the magnetically connected cover plate 8 from the carrier 6, making it easier to remove the product between the carrier 6 and the cover plate 8.

[0022] The top block 24 is made of insulating material to prevent it from attracting the carrier 6 and the cover plate 8. A top rod 241 is located above the top block 24, which engages with the clearance groove 61 on the carrier 6, allowing the top rod 241 to pass through the carrier 6 and lift the cover plate 8. The top block 24 and the lifting plate 23 are quickly connected via a magnet base 26, facilitating the adjustment and replacement of the top block 24 to match different carriers 6 and cover plates 8, thus lifting the corresponding cover plate 8. The magnet base 26 and the lifting plate 23 are magnetically connected, allowing for quick switching of the positions of the magnet base 26 and the top block 24 relative to the lifting plate 23, and easy removal of the magnet base 26 and the top block 24 from the lifting plate 23, achieving quick replacement and accommodating different carriers 6 and cover plates 8. The magnet base 26 and the top block 24 are fixedly connected, which can be achieved using bolts, snap-fit ​​connections, or other methods.

[0023] Please refer to Figure 5 As shown, in one embodiment of this application, a buffer 25 is provided above the top block 24 on the inner side relative to the top rod 241. The buffer 25 serves as a buffer connection between the top rod 241 and the carrier 6 when the cover plate 8 is lifted upwards. It can reduce the impact on the carrier 6 and provide support for the carrier 6. At the same time, when the top block 24 lifts the cover plate 8, it drives the carrier 6 to move upwards a certain distance so that the carrier 6 abuts against the limiting component 4, fixing the carrier 6 between the buffer 25 and the limiting component 4, facilitating the separation of the cover plate 8 from the carrier 6. In this embodiment, the buffer 25 is a hydraulic buffer, which has no rebound and is suitable for large impact forces, with high reliability, safety, and operating efficiency.

[0024] Please continue to refer to Figure 5 As shown, in another embodiment of this application, two sets of first guide components 27 are connected between the fixed plate 21 and the lifting plate 23. The two sets of first guide components 27 are arranged in a rectangular array, and a connecting plate 28 is connected between the lower ends of each set of first guide components 27.

[0025] In this embodiment, the lifting plate 23 is guided by the first guide component 27 to ensure smooth lifting and precise lifting direction. In this embodiment, two sets of first guide components 27 are used to ensure the guiding effect. Each set of first guide components 27 has two components, and a connecting plate 28 connects the two sets of first guide components 27 to ensure the stability and synchronization of each set of first guide components 27.

[0026] In this embodiment, the first guide assembly 27 consists of a guide rod and a linear bearing. The guide rod is installed between the connecting plate 28 and the lifting plate 23, and the linear bearing is installed on the fixed plate 21, ensuring that the lifting plate 23 can move up and down relative to the fixed plate 21. Here, the connecting plate 28 can limit the upward movement of the guide rod to prevent the guide rod from separating from the linear bearing.

[0027] Please refer to Figure 1 , Figure 3 and Figure 4 As shown, in another embodiment of this application, the conveyor line 1 includes two supports 11 arranged side by side. Each support 11 has a plurality of belt conveyor structures 12 arranged horizontally along its length direction. Each support 11 has a plurality of flow channel cover plates 13 covering the belt conveyor structures 12 along its length direction.

[0028] In this embodiment, the conveyor line 1 is used for conveying the carrier 6. The conveyor line 1 includes a bracket 11, a belt conveyor structure 12, and a flow channel cover 13. The bracket 11 is used to install the belt conveyor structure 12, and the flow channel cover 13 is used to limit the movement of the carrier 6, ensuring that the carrier 6 can be accurately conveyed on the conveyor line 1 and preventing the carrier 6 from tilting and falling off the conveyor line 1. Two brackets 11 are arranged side by side to form two parallel belt conveyor structures, which can provide stable support for the carrier 6. Each bracket 11 is provided with several belt conveyor structures 12 to form a long-distance conveying structure.

[0029] Furthermore, the belt conveyor structure 12 includes a first motor 121 and a first driven pulley 123 mounted on the bracket 11. The output shaft of the first motor 121 is connected to a first driving pulley 122, and two first driven pulleys 123 are respectively disposed on both sides of the first driving pulley 122. A first belt 124 connects the first driving pulley 122 and the first driven pulleys 123. The belt conveyor structure 12 drives the first driving pulley 122 to rotate through the first motor 121, which in turn drives the first belt 124 to rotate, thus realizing the conveying function.

[0030] Furthermore, a belt support plate 125 is provided along the length of the bracket 11, positioned in the middle of the first belt 124. A tensioning wheel 126 for adjusting the tension of the first belt 124 is provided between the first driving pulley 122 and the first driven pulley 123. The bracket 11 has an oblong hole for adjusting the position of the tensioning wheel 126. The belt support plate 125 supports and guides the first belt 124, preventing it from sagging, reducing frictional resistance, evenly distributing the load on the belt, avoiding localized stress concentration, extending belt life, and ensuring a smooth and efficient conveying process. The tensioning wheel 126 is used for adjusting the tension of the first belt 124, and its position is adjusted via the oblong hole on the bracket 11, thereby achieving tension adjustment of the first belt 124.

[0031] Please refer to Figure 3As shown, based on the above embodiments, in another embodiment of this application, the number of blocking cylinders 3 is two, and the number of limiting components 4 is four. The two blocking cylinders 3 and the four limiting components 4 are respectively disposed on two brackets 11. The limiting component 4 includes a limiting plate 41 fixed on the bracket 11, and the limiting plate 41 is provided with a height-adjustable limiting screw 42.

[0032] In this embodiment, two blocking cylinders 3 are used to block the transport of the carrier 6 on the conveyor line 1, ensuring that the carrier 6 can accurately stop above the lifting structure 2, so that the lifting structure 2 can lift the cover plate 8 on the carrier 6. There are four limiting components 4, which can limit the four corners of the carrier 6, ensuring effective limiting of the carrier 6 and ensuring the stability of the carrier 6 when it separates from the cover plate 8.

[0033] In this embodiment, the limiting component 4 includes a limiting plate 41 and a limiting screw 42. The limiting plate 41 is used for the installation and fixing of the limiting screw 42. The limiting plate 41 has an inverted L-shaped structure, which facilitates the installation of the limiting screw 42. The limiting screw 42 is screwed onto the limiting plate 41, which facilitates the height adjustment of the limiting screw 42 and can adapt to the limiting of carriers 6 with different thicknesses.

[0034] Please refer to Figure 4 As shown, in another embodiment of this application, the positioning component 5 includes a positioning cylinder 51 horizontally mounted on the conveyor line 1. The piston rod of the positioning cylinder 51 extends toward the center of the conveyor line 1 and is connected to a push plate 52. The positioning component 5 is used for positioning the carrier 6 and works with the blocking cylinder 3 to ensure the accurate positioning of the carrier 6. The positioning component 5 includes a positioning cylinder 51 and a push plate 52. The positioning cylinder 51 drives the push plate 52 to move back and forth, thereby pushing the carrier 6 on the conveyor line 1, ensuring the accurate positioning of the carrier 6, and thus ensuring the effective lifting of the cover plate 8 by the lifting structure 2.

[0035] Please refer to Figure 3 and Figure 4 As shown, in another embodiment of this application, a width adjustment structure 7 is provided on one side of the conveyor line 1. The width adjustment structure 7 includes two support plates 71 arranged along the length direction of the bracket 11. A second motor 72 is installed in the middle of the two support plates 71. A second drive wheel 73 is provided at the output shaft end of the second motor 72. A second driven wheel 74 is installed on each of the two support plates 71. A second belt 75 is connected between the second drive wheel 73 and the two second driven wheels 74. A ball screw 77 is connected to each of the two second driven wheels 74. Both ball screws 77 are rotatably connected to the two brackets 11 and the brackets 11 near the side of the support plate 71 are connected to the nuts of the ball screws 77.

[0036] In this embodiment, the width adjustment structure 7 is used to adjust the width of the conveyor line 1, ensuring that the conveyor line 1 can adapt to the transport of carriers 6 of different widths. The width adjustment structure 7 adjusts the distance between the two supports 11, thereby adjusting the conveying width of the conveyor line 1. The second driven wheel 74 is mounted on the support plate 71. The second motor 72 drives the second driving wheel 73 to rotate, which in turn drives the second belt 75 to transmit power between the second driving wheel 73 and the second driven wheel 74. The rotation of the second driven wheel 74 drives the ball screw 77 connected to it to rotate. The rotation of the ball screw 77 causes the nut of the ball screw 77 to move linearly. The nut of the ball screw 77 is connected to the support 11, thereby moving the support 11 connected to the nut of the ball screw 77, adjusting the distance between the two supports 11, and thus adjusting the conveying width of the conveyor line 1.

[0037] Furthermore, each of the two support plates 71 and each of the two brackets 11 is connected to a second guide assembly 76. The second guide assembly 76 includes a guide rod passing through the two brackets 11 and a linear bearing connected to the bracket 11 near the side of the support plate 71. The second guide assembly 76 guides the movement of the bracket 11 connected to the nut of the ball screw 77, ensuring smooth and stable movement of the bracket 11 and smooth width adjustment of the width adjustment structure 7. Specifically, the second guide assembly 76 includes a guide rod and a linear bearing. The guide rod connects the support plate 71 and the two brackets 11, and the linear bearing connects to the bracket 11 connected to the nut of the ball screw 77, guiding the movement of the bracket 11 and ensuring smooth and stable movement.

[0038] In this application, the carrier 6 is transported via the conveyor line 1. When the carrier 6 moves above the lifting structure 2, the piston rod of the blocking cylinder 3 extends to block and limit the carrier 6. Then, the positioning component 5 is activated, and the piston rod of the positioning cylinder 51 extends to drive the push plate 52 to push the carrier 6 forward, thus positioning the carrier 6. Next, the lifting structure 2 is activated, and the lifting cylinder 22 drives the lifting plate 23 to rise, which in turn drives the top block 24 to rise synchronously. The push rod 241 on the top block 24 can pass through the clearance groove 61 on the carrier 6 and abut against the cover plate 8 on the carrier 6. The buffer 25 provides support to the bottom of the carrier 6, clamping the carrier 6 between the buffer 25 and the limiting screw 42 of the positioning component 4. As the lifting plate 23 continues to rise, the cover plate 8 can be separated from the carrier 6, making it easier to remove the product from the carrier 6.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A conveying top pin mechanism for an automatic capping machine, comprising a conveyor line (1) and a carrier (6) for loading products on the conveyor line (1), characterized in that: The conveyor line (1) is a double-row parallel belt line with a lifting structure (2) in the middle and below. The conveyor line (1) is equipped with a blocking cylinder (3), a limiting component (4) and a positioning component (5) at the position corresponding to the lifting structure (2). The lifting structure (2) includes a fixed plate (21). A lifting cylinder (22) is provided in the lower middle of the fixed plate (21). The piston rod of the lifting cylinder (22) passes upward through the fixed plate (21) and is connected to a lifting plate (23). The lifting plate (23) is provided with at least two pairs of symmetrically arranged top blocks (24). The top blocks (24) are made of insulating material. The upper side of the top blocks (24) is provided with an upwardly protruding top rod (241) for lifting. A magnet seat (26) is provided between the top blocks (24) and the lifting plate (23). The magnet seat (26) is magnetically connected to the lifting plate (23). The magnet seat (26) is fixedly connected to the top blocks (24). The carrier (6) is provided with multiple clearance grooves (61) that cooperate with the top rods (241).

2. The conveying top pin mechanism of an automatic capping machine according to claim 1, characterized in that: A buffer (25) is provided on the upper side of the top block (24) relative to the inner side of the top rod (241).

3. The conveying top pin mechanism of an automatic capping machine according to claim 1, characterized in that: Two sets of first guide components (27) are connected between the fixed plate (21) and the lifting plate (23). The two sets of first guide components (27) are arranged in a rectangular array, and a connecting plate (28) is connected between the lower ends of each set of first guide components (27).

4. The conveying top pin mechanism of an automatic capping machine according to claim 1, characterized in that: The conveyor line (1) includes two supports (11) arranged side by side. Each support (11) has several belt conveyor structures (12) arranged horizontally along its length direction. Each support (11) has several flow channel covers (13) covering the belt conveyor structures (12) along its length direction.

5. The conveying top pin mechanism of an automatic capping machine according to claim 4, characterized in that: The belt conveyor structure (12) includes a first motor (121) and a first driven wheel (123) mounted on a bracket (11). The output shaft of the first motor (121) is connected to a first driving wheel (122). The two first driven wheels (123) are respectively located on both sides of the first driving wheel (122). A first belt (124) is connected between the first driving wheel (122) and the first driven wheel (123).

6. The conveying top pin mechanism of an automatic capping machine according to claim 5, characterized in that: The bracket (11) is provided with a belt support plate (125) along its length direction. The belt support plate (125) is located in the middle of the first belt (124). A tensioning wheel (126) for adjusting the tension of the first belt (124) is provided between the first driving wheel (122) and the first driven wheel (123). The bracket (11) is provided with a waist-shaped hole for adjusting the position of the tensioning wheel (126).

7. The conveying top pin mechanism of an automatic capping machine according to claim 4, characterized in that: The number of blocking cylinders (3) is two, and the number of limiting components (4) is four. The two blocking cylinders (3) and the four limiting components (4) are respectively disposed on two brackets (11). The limiting component (4) includes a limiting plate (41) fixed on the bracket (11). The limiting plate (41) is provided with a height-adjustable limiting screw (42).

8. The conveying top pin mechanism of an automatic capping machine according to claim 1, characterized in that: The positioning component (5) includes a positioning cylinder (51) horizontally mounted on the conveyor line (1), the piston rod of the positioning cylinder (51) extending toward the center of the conveyor line (1) and connected to a push plate (52).

9. The conveying top pin mechanism of an automatic capping machine according to claim 4, characterized in that: The conveyor line (1) is provided with a width adjustment structure (7) on one side. The width adjustment structure (7) includes two support plates (71) arranged along the length direction of the bracket (11). A second motor (72) is installed in the middle of the two support plates (71). A second drive wheel (73) is provided at the output shaft end of the second motor (72). A second driven wheel (74) is installed on each of the two support plates (71). A second belt (75) is connected between the second drive wheel (73) and the two second driven wheels (74). A ball screw (77) is connected to each of the two second driven wheels (74). Both ball screws (77) are rotatably connected to the two brackets (11) and the brackets (11) near the side of the support plate (71) are connected to the nuts of the ball screws (77).

10. The conveying top pin mechanism of an automatic capping machine according to claim 9, characterized in that: Each of the two support plates (71) and the two brackets (11) is connected to a second guide assembly (76), which includes a guide rod passing through the two brackets (11) and a linear bearing connected to the bracket (11) near the side of the support plate (71).

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