A cap screwing device

Abstract

The application discloses a cap rotating device for rotating an upper cap to cover a bottle body, which comprises a rotating driving assembly, a transverse driving assembly and a suction assembly. The rotating driving assembly comprises a rotating driving part fixed on a stand and a connecting head rotating under the driving of the rotating driving part. A slot is formed in the connecting head from its lower surface upwardly and along a first direction to form a side opening. The suction assembly comprises a lifting cylinder and a suction part moving up and down along a connecting plate under the driving of the lifting cylinder. The suction part comprises a suction rod body, which comprises a top end plug-in part and a suction channel below the plug-in part. The suction channel can generate negative pressure to suck the upper cap, and the plug-in part can enter and exit the slot from the side opening and move up and down in the slot. After the upper cap sucked by the suction rod body is abutted against the bottle body, the lifting cylinder is cut off, and the suction part moves downward along the slot synchronously with the upper cap under the gravity of the suction part and the upper cap.

Description

Technical Field

[0001] This invention relates to the field of automated processing equipment technology, and in particular to a capping device. Background Technology

[0002] When the workpiece is a container, it typically consists of a bottle body and a cap threadedly connected to the bottle body. Therefore, during workpiece assembly, the cap needs to be screwed onto the bottle body. To improve production efficiency, a capping device is usually used to tighten the cap onto the bottle body. The capping device typically uses a clamping mechanism to hold the cap, which rotates under the drive of a rotary drive component. Then, a lifting cylinder drives the clamping mechanism to press down to perform the capping assembly. However, the pressure applied to the bottle body at this time is too great, which can damage the bottle body or the cap, resulting in a low yield rate of produced products and making it impossible to ensure the consistency of the bottles after capping. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a capping device that applies less downward pressure to the cap when tightening it, and improves the product yield by inspecting the workpiece after capping.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a capping device for rotating and closing a cap onto a bottle body, the capping device comprising a carrier for supporting the bottle body and a capping mechanism, the capping mechanism comprising: Erecting the frame; A rotary drive assembly includes a rotary drive component fixed on the upright and a connector that rotates under the drive of the rotary drive component. The connector has a slot extending upward from its lower surface and the slot passes through the connector in a first direction to form a side opening. A transverse drive assembly is disposed on the upright, the transverse drive assembly including a connecting plate that can reciprocate in a first direction to switch between a first position and a second position; The adsorption assembly includes a lifting cylinder fixed to a connecting plate and an adsorption element that moves up and down along the connecting plate under the drive of the lifting cylinder. The adsorption element includes an adsorption rod, which includes a plug at the top and an adsorption channel located below the plug. The adsorption channel can generate negative pressure to adsorb the top cover. The plug can enter and exit the slot from the side opening and can move up and down within the slot. The connector can drive the adsorption rod to rotate synchronously. After the top cover adsorbed on the adsorption rod abuts against the bottle, the lifting cylinder cuts off the air supply, and the adsorption element moves down along the slot synchronously with the top cover under its own weight and the drive of the top cover.

[0005] The beneficial effects of this invention are as follows: The adsorption component and the rotary drive component are connected and disconnected through a slot and a connector. During connection, the rotary drive component drives the adsorption component to rotate, thereby rotating the top cover. At this time, the rotary drive component only applies rotational force to the adsorption component, without downward pressure. Simultaneously, the lifting cylinder cuts off the air supply, allowing the adsorption component to move downward along the slot due to gravity, thus satisfying the capping requirement. In other words, only the weight of the adsorption component is on the top cover and the bottle body, greatly reducing the stress on the top cover and the bottle body and preventing damage. The transverse drive component then drives the adsorption component to move along the first direction to separate from the rotary drive component, allowing for material removal from the top cover.

[0006] The adsorption component and the rotary drive component are designed as a plug-in separate structure, which can both allow for cap tightening and loading of the top cover. When the rotary drive component drives the adsorption component to rotate, it only applies rotational force to the adsorption component and does not exert downward pressure, thereby reducing the downward pressure on the top cover and the bottle body and preventing damage to the top cover and the bottle body.

[0007] Furthermore, the housing of the lifting cylinder is fixed to the connecting plate, the piston rod of the lifting cylinder is fixedly connected to a lifting plate, and the adsorption component includes a bearing seat fixedly connected to the lifting plate. The adsorption rod vertically passes through the bearing seat and is rotatably connected to the bearing seat. When the adsorption assembly is screwed on, the lifting cylinder is de-pressed, and the adsorption component drives the piston rod of the lifting cylinder to move downward. Through the connection structure of the lifting cylinder, it is ensured that when the cap is screwed on, only the gravity of the adsorption component is applied to the top cover.

[0008] Furthermore, the adsorption assembly also includes a first spring, with its two ends fixedly connected to the lifting plate and the upright frame, respectively. When the lifting cylinder is de-pressurized, the adsorption component can overcome the spring force of the first spring and move downwards. The first spring further reduces the downward force exerted by the adsorption component on the top cover and the bottle body, preventing the top cover and the bottle body from being crushed.

[0009] Furthermore, the adsorption assembly also includes a positioning component, which includes a lateral drive fixed to the lifting plate. The lateral drive drives the positioning post to reciprocate along a second direction. The adsorption rod has a positioning groove located below the insertion part for the positioning post to insert into. The positioning component is used to limit the angle of the adsorption rod when the adsorption assembly and connector are separated to prevent rotation of the adsorption rod, ensuring that the insertion part and slot can be re-aligned after separation.

[0010] Furthermore, the sidewall of the slot has at least one flat surface, and the shape of the insertion part matches that of the slot. This flat surface design allows the connector and the suction rod to rotate synchronously, preventing relative rotation between them.

[0011] Furthermore, the rotary drive assembly also includes a detection unit, which comprises a photoelectric switch and a positioning disk. The photoelectric switch is fixed to the upright frame, and the positioning disk is fixed to the connector and rotates synchronously with the connector. The positioning disk has a positioning notch that can trigger the photoelectric switch to send a signal to stop the rotary drive. The detection unit is communicatively connected to the rotary drive and is used to limit the rotation angle of the rotary drive's rotation axis, preventing excessive rotation of the connector and thus avoiding damage to the threads connecting the top cover and the bottle body.

[0012] Furthermore, the rotation shaft of the rotary drive component is fixedly connected in sequence via a torque limiter, a torque sensor, and the connector. By setting the torque limiter to limit the torque received by the connector, the rotary drive component will stop working when the torque is too large. This prevents the top cover from rotating even after it has been tightened to the correct position, which could cause over-tightening and damage to the workpiece. It also prevents excessive torque from being received by the connector and the suction rod, which could also cause damage.

[0013] Furthermore, the carrier is mounted on a turntable, and the capping device also includes a detection mechanism located behind the capping mechanism in the rotation direction of the turntable. The detection mechanism is used to detect the height difference between the lower surface of the bottle and the upper surface of the cap. When this height difference is within a preset range, the capping is qualified.

[0014] The detection mechanism includes a lifting drive and a detection component. The detection component includes a fixed frame, a second displacement sensor, a first docking component, and a second docking component. The fixed frame is lifted and lowered by the lifting drive. The second displacement sensor and the first docking component are fixed on the fixed frame. The second docking component is lifted and lowered synchronously with the fixed frame and can be lifted and lowered relative to the fixed frame. When the detection component moves downward, the second docking component and the first docking component abut against the upper surface of the positioning plate of the carrier and the upper surface of the upper cover, respectively. The positioning plate pushes the second docking component to move upward relative to the fixed frame. The second displacement sensor is used to detect the relative movement distance of the first docking component and the second docking component.

[0015] Furthermore, the second docking component includes a fixedly connected positioning sleeve, guide post, and plate. The positioning sleeve is provided with a clearance hole for the bottle and the top cover to pass through. The fixing frame includes a horizontal plate, on which a linear bearing for guiding the guide post is provided. The top of the guide post passes upward through the horizontal plate and is fixed to the plate. The test head of the second displacement sensor abuts against the upper surface of the plate.

[0016] Furthermore, the detection component is connected to the lifting drive via a corresponding floating component. The floating component includes a vertical plate fixedly connected to the output end of the lifting drive. The vertical plate includes a horizontal portion, which vertically passes through a vertical rod. A fall arrestor is fixed on the vertical rod above the horizontal portion. The lower end of the vertical rod is fixedly connected to the fixed frame. A second spring is sleeved on the vertical rod between the fixed frame and the horizontal portion. While the lifting component moves up and down under the drive of the lifting drive, it can also move up and down relative to the lifting drive, using the floating component to compensate for vertical machining errors of the vehicle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a workpiece placed on a carrier in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the capping mechanism in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the capping mechanism from another angle in an embodiment of the present invention; Figure 4 This is a schematic diagram of the connecting plate in the first position in an embodiment of the present invention; Figure 5 This is a schematic diagram of the adsorption component in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the rotary drive assembly in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the adsorption element in an embodiment of the present invention; Figure 8 This is a top view of the capping device in an embodiment of the present invention; Figure 9 This is a schematic diagram of the detection mechanism in an embodiment of the present invention; Figure 10 This is a side view of the detection mechanism in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the floating component and the detection component in an embodiment of the present invention.

[0018] In the picture: 1. Vehicle; 11. Positioning plate; 12. Column; 2. Capping mechanism; 21. Frame; 22. Lateral drive assembly; 221. Connecting plate; 222. Linear module; 23. Rotary drive assembly; 231. Rotary drive component; 232. Connector; 2321. Slot; 233. Torque limiter; 234. Torque sensor; 235. Detection unit; 2351. Photoelectric switch; 2352. Positioning plate; 24. Adsorption assembly; 241. Adsorption component; 2411. Adsorption rod; 24111. Insertion part; 24112. Adsorption channel; 24113. Positioning groove; 2412. Lifting plate; 2413. Bearing seat; 24131. Air supply channel; 242. Lifting cylinder; 243. First spring; 244. Positioning component; 2441. Lateral drive component; 2442. Positioning column; 25. First displacement sensor; 3. Turntable; 4. Testing institutions; 41. Lifting drive component; 42. Detection assembly; 421. Fixing frame; 422. Second displacement sensor; 423. Connecting part one; 424. Connecting part two; 4241. Positioning sleeve; 4242. Guide column; 4243. Plate; 43. Floating assembly; 431. Vertical plate; 432. Vertical pole; 4321. Fall protection part; 433. Second spring; 5. Workpiece; 51. Bottle body; 52. Top cover; 6. Bottle cap feeding device. Detailed Implementation The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0019] In the figures below, the first direction is the X direction, the second direction is the Y direction, and the vertical direction is the Z direction.

[0020] The present invention provides a capping device for processing and inspecting a workpiece 5. The workpiece 5 includes a bottle body 51 and a cap 52 threadedly connected to the bottle body 51. The capping device is used to rotate the cap 52 onto the bottle body 51.

[0021] The capping device includes a carrier 1 and a capping mechanism 2, see appendix. Figure 1 As shown, the carrier 1 is used to carry the bottle body 51, and the capping mechanism 2 is used to grab the cap 52 fed by the cap feeding device 6 and tighten the cap 52 onto the bottle body 51.

[0022] See appendix Figure 2 and attached Figure 8The capping mechanism 2 includes a stand 21, a transverse drive assembly 22, a rotary drive assembly 23, and an adsorption assembly 24. The stand 21 is used to position the rotary drive assembly 23 and the transverse drive assembly 22. The adsorption assembly 24 is inserted into the rotary drive assembly 23. The adsorption assembly 24 can reciprocate relative to the stand 21 in a first direction under the drive of the transverse drive assembly 22 to switch between the cap feeding device and the carrier 1. At the same time, the adsorption assembly 24 can move up and down to grab the caps on the cap feeding device 6 and rotate the cap 52 onto the bottle body 51 on the carrier 1.

[0023] See appendix Figure 3 and attached Figure 6 The rotary drive assembly 23 includes a rotary drive member 231 fixed on the support frame 21 and a connector 232 that rotates under the drive of the rotary drive member 231. When the rotary drive member 231 is activated, it can drive the connector 232 to rotate synchronously around its own axis. For example, the rotary drive member 231 is a servo motor fixed on the support frame 21. The connector 232 has a slot 2321 extending upward from its lower surface, and the slot 2321 penetrates the connector 232 along a first direction to form at least one side opening. For example, the slot 2321 has an inverted U-shaped structure, with a lower opening and two side openings.

[0024] The lateral drive assembly 22 is fixed on the stand 21 and is used to drive the adsorption assembly 24 to reciprocate along a first direction. The lateral drive assembly 22 includes a connecting plate 221 that can reciprocate along the stand 21 in the first direction to switch between a first position and a second position. The adsorption assembly 24 is disposed on the connecting plate 221. When the connecting plate 221 is in the first position, the adsorption assembly 24 is located above the bottle cap gripping and feeding device 6 and can adsorb and grip a top cap 52 conveyed by the bottle cap gripping and feeding device 6; when the connecting plate 221 is in the second position, the adsorption assembly 24 is inserted into the slot 2321.

[0025] See appendix Figure 5 and attached Figure 7 The adsorption assembly 24 includes an adsorption element 241 and a lifting cylinder 242. The lifting cylinder 242 is fixed on the connecting plate 221, and the adsorption element 241 moves up and down along the connecting plate 221 under the drive of the lifting cylinder 242. The adsorption element 241 includes an adsorption rod 2411, which includes a top insertion portion 24111. The insertion portion 24111 can enter and exit the slot 2321 from the side opening to be inserted into or separated from the connector 232. The insertion portion 24111 can also move up and down within the slot 2321 to achieve up and down movement of the adsorption rod 2411 as a whole relative to the connector 232. An adsorption channel 24112 is provided on the adsorption rod 24111 below the insertion portion 24111. The adsorption channel 24112 can generate negative pressure to adsorb the top cover 52.

[0026] When the connector 232 rotates, it drives the adsorption rod 2411 inserted with it to rotate synchronously. At this time, the adsorption rod 2411 can move down relative to the rotating head but will not separate from the rotating head. That is, when the insertion part 24111 rotates, a part of it is always inserted into the slot 2321. At the same time, after the top cover 52 adsorbed on the adsorption rod 2411 abuts against the bottle body 51, the lifting cylinder 242 cuts off the air supply. The lifting cylinder 242 no longer provides a vertical force to the adsorption component 241. At this time, the height position of the adsorption rod 2411 is restricted by the bottle body 51. When the top cover 52 continues to rotate, under the action of the gravity of the adsorption component 241 itself, the adsorption rod 2411 moves down synchronously with the top cover 52 along the slot 2321 to complete the screw cap.

[0027] For example, the bottle cap feeding device 6 includes a vibratory feeder that transports bottle caps one by one to the feeding station. When the connecting plate 221 is in the first position, the adsorption component 24 is located directly above the feeding station, and the adsorption part can move down to adsorb one of the caps 52 on the feeding station.

[0028] The bottle cap feeding device 6 transports the caps 52 one by one to the feeding station. See attached document. Figure 4 As shown, the horizontal movement drive assembly 22 drives the connecting plate 221 to the first position. At this time, the adsorption assembly 24 and the connecting plate 221 move synchronously along the first direction and separate from the connector 232, with the adsorption component 241 located directly above the loading station. Next, the lifting cylinder 242 drives the adsorption component 241 to move downwards, adsorbing the upper cover 52 on the loading station. Then, the lifting cylinder 242 drives the adsorption component 241 to move upwards, at which point the insertion part 24111 aligns horizontally with the slot 2321. (See attached diagram) Figure 3 As shown, the transverse drive assembly 22 drives the connecting plate 221 to the second position, and the insertion part 24111 is inserted into the slot 2321. The rotation drive 231 drives the adsorption rod 2411 to rotate through the connector 232. When the top cover 52 and the bottle 51 are against each other, the lifting cylinder 242 no longer applies vertical force to the adsorption component 241. During the rotation, the adsorption rod 2411 moves down along the slot 2321 due to the gravity of the adsorption component 241 and the drive of the top cover 52, tightening the top cover 52 onto the bottle 51.

[0029] Compared to the existing technology, where the rotary drive component 23 and the adsorption component 24 are fixedly connected, when the top cover 52 is rotated, both the rotary drive component 23 and the adsorption component 24 will press on the top cover 52 and the bottle body 51. For the top cover 52 and the bottle body 51, which are small in size and have low hardness, the top cover 52 and the bottle body 51 are easily crushed. In this embodiment, the adsorption component 24 and the rotary drive component 23 are connected and separated through the slot 2321 and the insertion part 24111. During connection, the rotary drive component 23 drives the adsorption component 24 to rotate, thereby rotating the top cover 52. At this time, the rotary drive component 23 only applies rotational force to the adsorption component 24, without downward pressure. Simultaneously, the lifting cylinder 242 cuts off the air supply, and the adsorption component 241 can move down along the slot 2321 due to gravity, satisfying the capping requirement of the top cover 52. That is, only the weight of the adsorption component 241 is on the top cover 52 and the bottle body 51, greatly reducing the force on the top cover 52 and the bottle body 51 and preventing damage to the top cover 52 and the bottle body 51. The transverse drive component 22 can also drive the adsorption component 24 to move along the first direction to separate from the rotary drive component 23 for material removal from the top cover 52.

[0030] In this embodiment, the capping device sets the adsorption component 24 and the rotation drive component 23 as a plug-in separate structure. While satisfying the capping function, it can also transport and feed the upper cover 52. When the rotation drive component 23 drives the adsorption component 24 to rotate, the rotation drive component 23 only applies rotational force to the adsorption component 24 and does not apply downward pressure, thereby reducing the downward pressure on the upper cover 52 and the bottle body 51 and avoiding damage to the upper cover 52 and the bottle body 51.

[0031] See appendix Figure 3 The housing of the lifting cylinder 242 is fixed to the connecting plate 221. The piston rod of the lifting cylinder 242 is connected to the adsorption component 241 to drive the adsorption component 241 to move up and down relative to the connecting plate 221. When the adsorption assembly 24 is screwed on, the lifting cylinder 242 is de-pressurized, and the adsorption component 241 drives the piston rod of the lifting cylinder 242 to move down. The lifting cylinder 242 drives the adsorption component 241 to move up and down to approach or move away from the top cover 52 or the carrier 1. However, when screwing on the top cover, the lifting cylinder 242 is de-pressurized and no longer applies a vertical force to the adsorption component 241. At this time, the adsorption component 241 moves down synchronously with the top cover 52 by its own weight.

[0032] When the lifting cylinder 242 is ventilated, it drives the piston rod to move up and down, thereby causing the adsorption element 241 to move upward or downward relative to the connecting plate 221. When the lifting cylinder 242 is de-ventilated, the piston rod is no longer subjected to the gas pressure inside the lifting cylinder 242, and at this time, the piston rod will not exert force on the adsorption element 241. When the upper cover 52 on the adsorption rod 2411 abuts against the bottle 51, the lifting cylinder 242 is de-ventilated, but due to the limitation of the bottle 51, the piston rod does not move down to its limit position. Therefore, when the upper cover 52 rotates and moves down, the adsorption rod 2411 can still drive the piston rod to continue to move down.

[0033] See appendix Figure 5 The adsorption component 241 also includes a lifting plate 2412 and a bearing seat 2413. The lifting plate 2412 is fixedly connected to the piston rod of the lifting cylinder 242. The bearing seat 2413 is fixed on the lifting plate 2412. The adsorption rod 2411 passes through the bearing seat 2413 vertically and is rotatably connected to the bearing seat 2413. At this time, the adsorption component 241, as a whole, can move synchronously along the first direction and the vertical direction. When tightening the cap, only the gravity of the adsorption component 241 is applied to the top cover 52 and the bottle body 51. At the same time, the adsorption rod 2411 can also rotate along its own axis under the drive of the rotation drive assembly 23.

[0034] The bearing housing 2413 is also provided with a gas supply channel 24131 that communicates with the adsorption channel 24112. The gas supply channel 24131 is connected to an external vacuum generator to provide negative pressure to the adsorption channel 24112. At this time, the bearing housing 2413 not only provides support for the rotation of the adsorption rod 2411, but also serves as a rotary connector 232 to supply gas to the adsorption rod 2411.

[0035] In one embodiment, see Appendix Figure 3 and attached Figure 4 The adsorption component 24 also includes a first spring 243. The two ends of the first spring 243 are fixedly connected to the lifting plate 2412 and the upright frame 21, respectively. When the lifting cylinder 242 is cut off, the adsorption component 241 can overcome the elastic force of the first spring 243 and move downward.

[0036] When the lifting cylinder is de-energized, the top cover 52 rests against the bottle body 51, and the first spring 243 is in a stretched or unstretched state, without exerting a downward force on the suction member 241. For example, when the lifting cylinder is de-energized, the first spring 243 is stretched, exerting an upward force on the suction member 241, further reducing the downward force exerted by the suction member 241 on the top cover 52 and bottle body 51, preventing damage to them. However, the weight of the suction member 241 ensures that the top cover 52 and bottle body 51 remain abutted. When the top cover 52 rotates downward, the entire suction member 241 can overcome the tension of the first spring 243 to continue moving downward, satisfying the capping requirement. At this time, the first spring 243 is continuously stretched.

[0037] When the connecting plate 221 is in the second position, the first spring 243 is in a vertical state. When the transverse drive assembly 22 drives the connecting plate 221 to the first position, the first spring 243 is in an inclined state. However, when the lifting cylinder 242 drives the adsorption component 241 to move down, the first spring 243 is continuously stretched.

[0038] To ensure that the connector 232 can synchronously drive the adsorption rod 2411 to rotate synchronously, the side wall of the slot 2321 has at least one flat surface, and the shapes of the insertion part 24111 and the slot 2321 are matched. By setting the flat surface, the rotating head and the adsorption rod 2411 rotate synchronously, avoiding relative rotation between them. For example, the slot 2321 has two opposing flat surfaces, and the insertion part 24111 is a cuboid, ensuring that the insertion part 24111 can enter and exit the slot 2321 along a first direction and can be restricted to rotation by the slot 2321, ensuring that the connector 232 and the adsorption rod 2411 rotate synchronously during insertion.

[0039] Because the slot 2321 has a flat surface, the adsorption rod 2411 must be inserted into the slot 2321 at a specific angle. However, when the connecting plate 221 is in the first position, the adsorption assembly 24 and the connector 232 are separated. If the adsorption rod 2411 rotates at this time, the insertion part 24111 and the slot 2321 cannot be aligned, meaning the insertion part 24111 cannot be inserted into the slot 2321. Therefore, in one embodiment, the adsorption assembly 24 further includes a positioning member 244. The positioning member 244 and the adsorption member 241 move synchronously along the first direction and the vertical direction. The positioning member 244 is used to limit the angle of the adsorption rod 2411 when the adsorption assembly 24 and the connector 232 are separated to prevent the adsorption rod 2411 from rotating.

[0040] See appendix Figure 5 As shown, the positioning component 244 includes a transverse drive component 2441 fixed on the lifting plate 2412. The transverse drive component 2441 drives a positioning post 2442 to reciprocate along a second direction. The adsorption rod body 2411 has a positioning groove 24113 for the positioning post 2442 to be inserted. When the positioning post 2442 is inserted into the positioning groove 24113, the adsorption rod body 2411 can no longer rotate.

[0041] When the connector 24111 is not inserted into the slot 2321, the positioning pin 2442 is inserted into the positioning groove 24113 under the drive of the transverse drive 2441, preventing the suction rod 2411 from rotating and ensuring that the suction rod 2411 is always aligned with the connector 24111 and the slot 2321. When the connector 24111 is inserted into the slot 2321, due to the limitation of the slot 2321, the connector 232 and the suction rod 2411 will not rotate relative to each other. Therefore, the positioning pin 2442 leaves the positioning groove 24113 under the drive of the transverse drive 2441. At this time, the positioning member 244 releases the restriction on the rotation of the suction rod 2411, and the suction rod 2411 can rotate synchronously under the drive of the connector 232.

[0042] The positioning groove 24113 is formed on the adsorption rod 2411 between the insertion part 24111 and the bearing seat 2413. The positioning groove 24113 will not be inserted into the slot 2321, nor will it be covered by the bearing seat 2413, and will not affect the insertion of the positioning post 2442.

[0043] In one embodiment, see Appendix Figure 6 The rotary drive component 231 is a servo motor, and the rotation shaft of the servo motor is fixedly connected to the connector 232 via a torque limiter 233, a torque sensor 234, and a connector 232. The torque limiter 233 restricts the torque on the connector 232. When the torque is too high, the rotary drive component 231 stops working, preventing the top cover 52 from rotating after it is fully tightened, which could cause over-tightening and damage to the workpiece 5. It also prevents excessive torque on the connector 232 and the suction rod 2411, which could also cause damage. The torque sensor 234 detects the torque in real time during the capping process.

[0044] In one embodiment, the rotary drive assembly 23 further includes a detection unit 235, which is communicatively connected to the rotary drive component 231 and is used to limit the rotation angle of the rotation axis of the rotary drive component 231. While the servo motor can set the rotation angle of the rotation axis, adding a detection unit 235 further improves safety and prevents excessive rotation of the connector 232, which could damage the connection threads between the top cover 52 and the bottle body 51.

[0045] The detection unit 235 includes a photoelectric switch 2351 and a positioning plate 2352. The photoelectric switch 2351 is fixed on the stand 21, and the positioning plate 2352 is fixed on the connector 232 and rotates synchronously with the connector 232. The positioning plate 2352 has a positioning notch. The positioning notch can trigger the photoelectric switch 2351, indicating that the connector 232 has rotated into place, and the rotation drive 231 stops working.

[0046] In this embodiment, based on the self-control of the rotation drive component 231, a detection unit 235 and a torque limiter 233 are added for double protection to ensure that the top cover 52 will not rotate too much, causing damage to the threaded connection between the top cover 52 and the bottle body 51.

[0047] In one embodiment, the capping mechanism 2 further includes a first displacement sensor 25 corresponding to the adsorption component 24. The first displacement sensor 25 is fixed on the lifting plate 2412 and is used to detect the downward movement distance of the lifting plate 2412 when the cap is screwed on. When the upper cover 52 is tightened, the upper cover 52 should move the same distance. Therefore, the first displacement sensor 25 is set to perform the first detection of the capping.

[0048] The transverse drive assembly 22 also includes a linear module 222 fixed on the upright 21, which is used to drive the connecting plate 221 to move along a first direction.

[0049] When the capping mechanism 2 is working, the positioning post 2442 is inserted into the positioning groove 24113. At this time, the adsorption rod 2411 cannot rotate. The lateral drive assembly 22 drives the connecting plate 221 to move along the first direction to the first position. During this process, the adsorption assembly 24 and the connecting plate 221 move synchronously and reach directly above the cap feeding device 6. Then, the lifting cylinder 242 drives the adsorption component 241 to move down, and the adsorption channel 24112 generates negative pressure, adsorbing a cap fed by the cap feeding device 6. Next, the lifting cylinder 242 drives the adsorption component 241 to move up and reset. The lateral drive assembly 22 drives the connecting plate 221 to move along the second direction to the second position, and the insertion part 24111 of the adsorption assembly 24 is inserted into the slot 2321 of the connector 232. The positioning post 2442 leaves the positioning groove 24113, and the lifting cylinder 242 drives the adsorption component 241 to move down to abut against the upper cover 52 and the bottle 51 on the carrier 1. Next, the lifting cylinder 242 cuts off the air supply. At this time, the lifting cylinder 242 no longer applies force to the adsorption component 241. The adsorption component 241, due to its own weight, ensures that the top cover 52 rests against the bottle body 51. The rotation drive component 231 drives the adsorption rod 2411 to rotate through the connector 232. The top cover 52 rotates synchronously and tightens onto the bottle body 51. At the same time, the lifting cylinder 242 releases the height restriction on the adsorption component 241. The top cover 52 can drive the adsorption component 241 and the piston rod of the lifting cylinder 242 to move down synchronously until the assembly of the top cover 52 is completed.

[0050] The rotary drive assembly 23, the transverse drive assembly 22, and the adsorption assembly 24 are one-to-one and multiple sets can be provided to assemble multiple sets of bottle bodies 51 and top covers 52. For example, there are two sets of each of the rotary drive assembly 23, transverse drive assembly 22, and adsorption assembly 24, with the two rotary drive assemblies 23 and the two transverse drive assemblies 22 each mounted on a stand 21.

[0051] In one embodiment, the carrier 1 is mounted on the turntable 3, and the stand 21 is located outside the turntable 3. The turntable 3 can bring the bottle 51 on the carrier 1 into the working area of ​​the capping mechanism 2.

[0052] After the bottle body 51 and the top cap 52 are assembled by the capping mechanism 2, they may not necessarily rotate into place due to errors or other reasons. Therefore, in one embodiment, see Appendix Figure 8 The capping device also includes a detection mechanism 4. The turntable 3 rotates the carrier 1 sequentially to the capping mechanism 2 and the detection mechanism 4, that is, the cap 52 and the bottle body 51 after being capped by the capping mechanism 2, and then moves them to the detection mechanism 4 for detection. The detection mechanism 4 is used to detect the height difference between the lower surface of the bottle body 51 and the upper surface of the cap 52. When this height difference is within a preset range, the capping is qualified.

[0053] See appendix Figure 1 The carrier 1 includes a positioning plate 11 and a column 12 fixed on the positioning plate 11. The lower surface of the bottle 51 is supported on the positioning plate 11. The lower surface of the bottle 51 and the upper surface of the positioning plate 11 are at the same height. A portion of the bottle 51 is fitted onto the column 12.

[0054] See appendix Figure 9 and attached Figure 10 The detection mechanism 4 includes a lifting drive 41 and a detection component 42 that moves up and down under the drive of the lifting drive 41. The detection component 42 includes a fixed frame 421, a second displacement sensor 422, a first docking component 423, and a second docking component 424. The fixed frame 421 moves up and down under the drive of the lifting drive 41. The second displacement sensor 422 and the first docking component 423 are fixed on the fixed frame 421. The second docking component 424 moves up and down synchronously with the fixed frame and can move up and down relative to the fixed frame 421. When the detection component 42 moves down, the second docking component 424 and the first docking component 423 abut against the upper surface of the positioning plate 11 and the upper surface of the top cover 52, respectively. The positioning plate 11 can push the second docking component 424 to move up relative to the fixed frame 421. The second displacement sensor 422 is used to detect the relative movement distance between the first docking component 423 and the second docking component 424. This relative movement distance is the height difference between the lower surface of the bottle 51 and the upper surface of the top cover 52.

[0055] During testing, the lifting drive 41 drives the testing assembly 42 downwards. The second docking part 424 initially abuts against the upper surface of the plate 4243, preventing it from moving further downwards. However, the lifting drive 41 drives the fixing frame 421 to continue moving downwards. At this point, the second docking part 424 moves upwards relative to the fixing frame 421 until the first docking part 423 abuts against the upper surface of the cover 52. The displacement sensor records the relative displacement between the first docking part 423 and the second docking part 424.

[0056] See appendix Figure 11The second docking component 424 includes a fixedly connected positioning sleeve 4241, guide post 4242, and plate 4243. The positioning sleeve 4241 has clearance holes for the bottle body 51 and the top cover 52 to pass through. The fixing frame 421 includes a horizontal plate with a linear bearing for guiding the guide post 4242. The top of the guide post 4242 passes upward through the horizontal plate and is fixed to the plate 4243. The test head of the second displacement sensor 422 rests against the upper surface of the plate 4243. The distance the horizontal plate moves relative to the fixing frame 421 is the relative displacement between the first docking component 423 and the second docking component 424. Simultaneously, the horizontal plate acts as a fall prevention mechanism, preventing the first docking component 423 from detaching from the fixing frame 421. The second docking component 424 is fixed to the lower surface of the horizontal plate.

[0057] In this embodiment, a detection mechanism 4 is set after the capping mechanism 2. After capping, the workpiece 5 formed by capping is re-inspected. The qualified and unqualified are classified by the detection of height difference to ensure that the workpiece 5 that has passed through the capping device is qualified.

[0058] In one embodiment, two detection components 42 are provided, and the two detection components 42 are connected to a lifting drive component 41. Each detection component 42 is connected to the lifting drive component 41 through a corresponding floating component 43. Since the lifting drive component 41 drives the two detection components 42 to move up and down synchronously, and the carrier 1 has processing errors, the floating component 43 is provided to compensate for the processing errors.

[0059] See appendix Figure 11 The floating assembly 43 includes a vertical plate 431 fixedly connected to the output end of the lifting drive 41. The vertical plate 431 includes a horizontal portion, through which a vertical rod 432 passes vertically. A fall arrestor 4321 located above the horizontal portion is fixed on the vertical rod 432. The lower end of the vertical rod 432 is fixedly connected to a fixing frame 421. A second spring 433 is sleeved on the vertical rod 432 between the fixing frame 421 and the horizontal portion. While the entire lifting assembly is lifted and lowered by the lifting drive 41, it can also move up and down relative to the lifting drive 41, using the floating assembly 43 to compensate for the vertical machining error of the carrier 1. The second spring 433 is continuously compressed when the lifting assembly moves upward relative to the lifting drive 41.

[0060] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A capping device for rotating and closing a cap onto a bottle body, characterized in that: The capping device includes a carrier for supporting the bottle and a capping mechanism, the capping mechanism including: Erecting the frame; A rotary drive assembly includes a rotary drive component fixed on the upright and a connector that rotates under the drive of the rotary drive component. The connector has a slot extending upward from its lower surface and the slot passes through the connector in a first direction to form a side opening. A transverse drive assembly is disposed on the upright, the transverse drive assembly including a connecting plate that can reciprocate in a first direction to switch between a first position and a second position; The adsorption assembly includes a lifting cylinder fixed to a connecting plate and an adsorption element that moves up and down along the connecting plate under the drive of the lifting cylinder. The adsorption element includes an adsorption rod, which includes a plug at the top and an adsorption channel located below the plug. The adsorption channel can generate negative pressure to adsorb the top cover. The plug can enter and exit the slot from the side opening and can move up and down within the slot. The connector can drive the adsorption rod to rotate synchronously. After the top cover adsorbed on the adsorption rod abuts against the bottle, the lifting cylinder cuts off the air supply, and the adsorption element moves down along the slot synchronously with the top cover under its own weight and the drive of the top cover.

2. The capping device according to claim 1, characterized in that: The housing of the lifting cylinder is fixed to the connecting plate. The piston rod of the lifting cylinder is fixedly connected to a lifting plate. The adsorption component includes a bearing seat fixedly connected to the lifting plate. The adsorption rod body passes vertically through the bearing seat and is rotatably connected to the bearing seat. When the adsorption component is screwed on, the lifting cylinder is de-aired, and the adsorption component drives the piston rod of the lifting cylinder to move downward.

3. The capping device according to claim 2, characterized in that: The adsorption assembly also includes a first spring, the two ends of which are fixedly connected to the lifting plate and the upright frame, respectively. When the lifting cylinder is cut off, the adsorption component can overcome the elastic force of the first spring and move downward.

4. The capping device according to claim 2, characterized in that: The adsorption assembly further includes a positioning component, which includes a transverse drive component fixed on the lifting plate. The transverse drive component drives the positioning column to reciprocate along a second direction. The adsorption rod body has a positioning groove located below the insertion part for the positioning column to be inserted.

5. The capping device according to claim 1, characterized in that: The sidewall of the slot has at least one flat surface, and the shape of the insertion part matches that of the slot.

6. The capping device according to claim 1, characterized in that: The rotary drive assembly also includes a detection unit, which includes a photoelectric switch and a positioning disk. The photoelectric switch is fixed on the stand, and the positioning disk is fixed on the connector and rotates synchronously with the connector. The positioning disk has a positioning notch, which can trigger the photoelectric switch to send a signal to stop the rotary drive.

7. The capping device according to claim 1, characterized in that: The rotating shaft of the rotary drive is fixedly connected in sequence through a torque limiter, a torque sensor, and the connector.

8. The capping device according to any one of claims 1-7, characterized in that: The carrier is mounted on a turntable, and the capping device further includes a detection mechanism located behind the capping mechanism in the rotation direction of the turntable; The detection mechanism includes a lifting drive and a detection component. The detection component includes a fixed frame, a second displacement sensor, a first docking component, and a second docking component. The fixed frame is lifted and lowered by the lifting drive. The second displacement sensor and the first docking component are fixed on the fixed frame. The second docking component is lifted and lowered synchronously with the fixed frame and can be lifted and lowered relative to the fixed frame. When the detection component moves downward, the second docking component and the first docking component abut against the upper surface of the positioning plate of the carrier and the upper surface of the upper cover, respectively. The positioning plate pushes the second docking component to move upward relative to the fixed frame. The second displacement sensor is used to detect the relative movement distance of the first docking component and the second docking component.

9. The capping device according to claim 8, characterized in that: The second docking component includes a fixedly connected positioning sleeve, guide post, and plate. The positioning sleeve is provided with a clearance hole for the bottle and the top cover to pass through. The fixing frame includes a horizontal plate, on which a linear bearing is provided to guide the guide post. The top of the guide post passes upward through the horizontal plate and is fixed to the plate. The test head of the second displacement sensor abuts against the upper surface of the plate.

10. The capping device according to claim 8, characterized in that: The detection component is connected to the lifting drive via a corresponding floating component. The floating component includes a vertical plate fixedly connected to the output end of the lifting drive. The vertical plate includes a horizontal part, which vertically passes through a vertical rod. An anti-fall part is fixed on the vertical rod above the horizontal part. The lower end of the vertical rod is fixedly connected to the fixing frame. A second spring is sleeved on the vertical rod between the fixing frame and the horizontal part.

Images