Lubricating structure for outer cover clamping mechanism

Abstract

The utility model discloses a lubricating structure for outer cover clamping mechanism, including setting on the sliding sleeve of connecting disc, sliding sleeve adaptation is with the sliding fit of lifting cylinder, and the side wall of sliding sleeve is provided with first oil injection hole, and the bottom of lifting cylinder is provided with oil receiving tray. Can inject lubricating oil to the outer wall one side of lifting cylinder through first oil injection hole, to reach the lubricating effect, make the sliding of lifting cylinder more smooth, stable. And the lubricating oil that seeps from the bottom of sliding sleeve can be discharged into the oil receiving tray downward, and it is not easy to cause the pollution to the bottle cap.

Description

Technical Field

[0001] This utility model relates to the field of bottle cap manufacturing technology, and in particular, to a lubrication structure for an outer cap clamping mechanism. Background Technology

[0002] Bottle caps are devices used to seal bottle openings. They employ threads, sealing rings, and other structures to prevent leakage and theft, and are widely used in packaging for beverages, food, and pharmaceuticals. With technological advancements, different types of bottle caps have emerged to meet customer needs.

[0003] For example, in the honey water beverage industry, the bottle caps are constructed as interlocking outer and inner caps, forming a chamber between the two caps to store the honey. This separates the honey from the water in the bottle, preventing spoilage through individual storage. When drinking, the relative rotation of the two caps causes a fitting screw-groove lifting structure between them to move axially, ultimately allowing the honey in the chamber to drain into the water in the bottle through a perforation.

[0004] When using an axially slidable outer cover clamping mechanism for the automatic assembly of inner and outer covers, the lack of a lubrication structure between the lifting cylinder and the connecting plate of the outer cover clamping mechanism can easily lead to uneven sliding and poor stability. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lubrication structure for an outer cover clamping mechanism.

[0006] The objective of this utility model is achieved through the following technical solution: A lubrication structure for an outer cover clamping mechanism includes a sliding sleeve disposed on a connecting plate, the sliding sleeve being adapted to slide with a lifting cylinder, a first oil injection hole being provided through the side wall of the sliding sleeve, and an oil receiving plate being provided at the bottom end of the lifting cylinder.

[0007] Preferably, a spline guide structure is adapted between the sliding sleeve and the lifting cylinder.

[0008] Preferably, a negative pressure liquid extraction system is attached to the oil receiving tray.

[0009] Preferably, a copper sleeve is provided inside the sliding sleeve, and a second oil injection hole is provided through the side wall of the copper sleeve, the second oil injection hole being opposite to the first oil injection hole.

[0010] Preferably, a fixing through groove is provided through the side wall of the sliding sleeve, and a fixing blind groove is correspondingly provided on the side wall of the copper sleeve. A fixing key is adapted in the fixing through groove and the fixing blind groove.

[0011] Preferably, a spiral oil passage is provided on the inner wall of the copper sleeve, and the second oil injection hole is connected to the spiral oil passage.

[0012] Preferably, the second oil injection hole is located at the top or middle of the spiral oil passage.

[0013] Preferably, the inner wall of the copper sleeve is provided with annular grooves at both ends of the spiral oil passage, and the two ends of the spiral oil passage are respectively connected to the two annular grooves.

[0014] The beneficial effects of this invention are: lubricating oil can be injected into one side of the outer wall of the lifting cylinder through the first oil injection hole, thereby achieving a lubrication effect and making the sliding of the lifting cylinder smoother and more stable. Furthermore, the lubricating oil seeping from the bottom of the sliding sleeve can be discharged downwards into the oil receiving tray, thus preventing contamination of the bottle cap. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a schematic diagram of the structure with part of the rack removed for an example embodiment; Figure 3 for Figure 2 A top-view structural diagram; Figure 4 This is a structural schematic diagram from one perspective of an embodiment; Figure 5 This is a structural schematic diagram from another perspective of the embodiment; Figure 6 This is a structural diagram of the outer cover clamping station; Figure 7 This is a schematic diagram of the spiral oil circuit. Figure 8 This is a schematic diagram of the inner cover rotation station.

[0016] Reference numerals: 1. Frame; 2. Rotary disc; 3. Outer cover feeding station; 4. Outer cover inspection station; 5. Inner cover feeding station; 6. Inner cover inspection station; 7. Combined cover discharging station; 8. Inner cover rotation station; 9. Outer cover clamping station; 10. Feeding disc; 11. Feeding groove; 12. First cam; 13. Connecting disc; 14. Lifting cylinder; 15. Push rod; 16. Cover gripper head; 17. Clamping bead; 18. First cam surface; 19. Second cam surface ; 20. Second cam; 21. Mounting base; 22. Motor; 23. Clamp; 24. Connecting hole; 25. Material conveying track; 26. Engaging tooth; 27. Connecting cylinder; 28. Weight reduction groove; 29. ​​Spring; 30. Sliding sleeve; 31. Copper sleeve; 32. Fixed through groove; 33. Fixed blind groove; 34. First oil injection hole; 35. Second oil injection hole; 36. Spiral oil passage; 37. Annular groove; 38. Oil receiving tray; 39. Third cam surface; 40. Arc surface. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] like Figures 1 to 8 As shown, a bottle cap assembly machine includes a frame 1, on which a rotating disk 2 is rotatably mounted. For example, the rotating disk 2 can rotate under the combined transmission of a drive motor and a reducer. Several inner cap rotating stations 8 are arranged circumferentially on the rotating disk 2. Through the transmission control of the drive motor, the circumferential position of each inner cap rotating station 8 on the rotating disk 2 can be determined.

[0019] Above the rotary table 2, the frame 1 is equipped with several outer cover clamping stations 9, each corresponding to a number of inner cover rotating stations 8. Specifically, the outer cover clamping stations 9 are adapted to rotate synchronously with the inner cover rotating stations 8; that is, when the inner cover rotating station 8 rotates by a certain angle, the outer cover clamping station 9 will also rotate by the same angle to maintain consistent vertical relative positions. Furthermore, the outer cover clamping stations 9 are also adapted to be able to transfer along the axial direction, thereby moving closer to or further away from the inner cover rotating station 8.

[0020] In addition, the frame 1 is also provided with an outer cover feeding station 3, an outer cover inspection station 4, an inner cover feeding station 5, an inner cover inspection station 6, and a combined cover discharge station 7 along the circumference of the rotating disk 2.

[0021] For example, under the transfer at the outer cover feeding station 3, the outer cover is transferred to the outer cover feeding position. At this time, the corresponding outer cover clamping station 9 can transfer downward and clamp the outer cover. The clamped outer cover can be lifted under the transfer at the outer cover clamping station 9 and rotate synchronously with the corresponding inner cover rotating station 8.

[0022] During the rotation, the clamped outer cover will pass over the outer cover inspection station 4. At this time, the outer cover inspection station 4 can use visual inspection to detect and determine the circumferential position of the outer cover. In a preferred example, the camera of the outer cover inspection station 4 can capture images of the notch on the outer cover in the projection direction, thereby determining the circumferential posture of the outer cover.

[0023] As the outer cover arrives at the inner cover feeding station 5, the inner cover can be fed into the corresponding inner cover rotation station 8. The inner cover and the outer cover will remain vertically opposite each other and rotate synchronously.

[0024] During rotation, the inner cover passes under the inner cover inspection station 6. Similar to the operating principle of the outer cover inspection station 4, the circumferential orientation of the inner cover can be determined in the same way. Slightly different, the orientation of the inner cover can be determined by photographing protrusions on its circumference. While this disclosure preferably describes the parts of the inner and outer covers used to determine their circumferential position, other methods of positioning by photographing other parts are not excluded.

[0025] Subsequently, the inner cover rotation station 8 controls the circumferential angle of the inner cover rotation based on the detection results of the two detection stations. In this way, the outer cover clamping station 9 can again axially transfer the outer cover to fit the rotated inner cover, so that the outer cover and the inner cover form a combined cover. Finally, the combined cover discharge station 7 can remove the combined cover from the inner cover rotation station 8 to complete the discharge.

[0026] In some embodiments, the outer cover feeding station 3, the inner cover feeding station 5, and the combined cover discharging station 7 all include a rotatable feeding disc 10, and a plurality of feeding grooves 11 are provided on the feeding disc 10 along the circumferential direction. When the feeding disc 10 rotates, the cover body engages and enters the feeding groove 11, and is discharged from a preset position as the feeding disc 10 rotates.

[0027] In a preferred embodiment, each feed tray 10 is also fitted with a conveyor track 25. For the outer cover feeding station 3 and the inner cover feeding station 5, the conveyor track 25 feeds the cover into each feed tray 10, which then rotates to discharge the cover onto one side of the rotary table 2. For the combined cover discharging station 7, the feed tray 10 can engage with the combined cover on the rotary table 2 and rotates to discharge the combined cover into the corresponding conveyor track 25.

[0028] For example, the rotating shaft of the feeding disc 10 can be coupled with the rotating shaft of the rotating disc 2 through gear transmission. Under the design and control of the gear transmission ratio, the feeding disc 10 can cooperate with the rotating disc 2 to complete the above-mentioned feeding and discharging actions with relatively high precision.

[0029] In some embodiments, the outer cover clamping station 9 may include a rotating unit and a plurality of ejection clamping units respectively provided. The rotating unit may also be driven by a drive source such as a motor to drive the plurality of ejection clamping units to eject axially, for example to realize the above-mentioned clamping of the outer cover and the synchronous rotation of the outer cover and the inner cover.

[0030] In another configuration, a connecting cylinder 27 can be coaxially mounted on the rotary disk 2, with a connecting plate 13 mounted at the top of the connecting cylinder 27. Several outer cover clamping units are distributed circumferentially on the connecting plate 13 and are adapted to slide axially. A first cam 12 is also mounted on the frame 1 above the connecting plate 13, and the top of the outer cover clamping station 9 engages with the first cam 12. When the rotary disk 2 rotates, the connecting plate 13 drives several outer cover clamping units to rotate synchronously with the rotary disk 2, while the first cam 12 remains relatively stationary. Thus, according to the design of the cam trajectory of the first cam 12, the outer cover clamping station 9 will be pushed out and lowered or raised at a preset rotation position by the first cam 12.

[0031] In a specific example, several weight-reducing grooves 28 can be formed along the circumferential direction on the connecting cylinder 27 to reduce the load on the rotating disk 2.

[0032] For example, the outer cover clamping station 9 specifically includes a lifting cylinder 14 and a push rod 15 that are nested together. The bottom end of the lifting cylinder 14 is specifically provided with a cover gripping head 16. The cover gripping head 16 is cylindrical in shape, and its inner wall is also provided with clamping beads 17. When the lifting cylinder 14 is pushed out and pressed down by the first cam 12, the outer cover will be inserted into the cover gripping head 16 until the clamping pin is engaged with the outer wall flange of the outer cover. Thus, when the lifting cylinder 14 is raised again, the outer cover can be gripped together.

[0033] The first cam 12 is designed with two cam tracks, for example, the two cam tracks can be constructed on the first cam 12 surface and the second cam 20 surface 19 respectively. The lifting cylinder 14 is adapted to engage with the first cam 12 surface, while the push rod 15 is adapted to engage with the second cam 20 surface 19. The two cam surfaces are designed with different cam tracks and are used to perform the following different ejection functions.

[0034] The specific timing and principle behind the design of the first cam 12 surface to drive the cap gripper head 16 to descend and grab the outer cover, and then descend again to fit the outer cover onto the inner cover, will not be elaborated here. The most significant difference is that after the outer cover is fitted onto the inner cover, the first cam 12 surface will drive the lifting cylinder 14 to rise again; at the same time, the second cam 20 surface 19 will drive the push rod 15 to descend and abut against the outer cover. This causes an axial relative movement tendency between the outer cover and the cap gripper head 16 until the clamping ball 17 disengages from the outer wall flange of the outer cover. Subsequently, the combined cover can be smoothly discharged at the combined cover discharge station 7.

[0035] In some examples, the second cam 20 surface 19 and the first cam 12 surface can both be constructed on the side of the first cam 12. The top ends of the lifting cylinder 14 and the push rod 15 are respectively hooked into the two cam grooves on the side of the first cam 12 through the cam follower. That is, at this time, the first cam 12 can simultaneously play the role of axial support for the lifting cylinder 14 and the push rod 15.

[0036] In other examples, the second cam 20 surface 19 can be constructed on the bottom surface of the first cam 12. In this case, for example, a spring 29 can be provided between the lifting cylinder 14 and the push rod 15 to maintain the push rod 15 in its initial position away from the outer cover in the axial direction. When the second cam 20 surface 19 drives the push rod 15 to descend and abut against the outer cover, the spring 29 will deform and tend to return the push rod 15 to its initial position.

[0037] In a possible example, the cap gripper 16 could also be equipped with a gripper or other mechanism to automatically grip and release the cap, but this would require an additional drive device, which could easily lead to unreliability in system control.

[0038] A sliding sleeve 30 is specifically provided on the connecting plate 13, and the lifting cylinder 14 is slidably fitted within the sliding sleeve 30. A spline-like guide structure can also be fitted between the lifting cylinder 14 and the sliding sleeve 30, which makes the axial transfer of the lifting cylinder 14 smoother and more reliable. Preferably, a copper sleeve 31 can also be provided inside the sliding sleeve 30. Since the copper sleeve 31 is relatively soft, the sliding contact between the inner wall of the copper sleeve 31 and the outer wall of the lifting cylinder 14 can prevent excessive wear on the lifting cylinder 14.

[0039] A fixing groove 32 is provided through the side wall of the sliding sleeve 30, and a fixing blind groove 33 is provided on the side wall of the copper sleeve 31. For example, fixing keys can be set in the fixing groove 32 and the fixing blind groove 33 to fix the sliding sleeve 30 and the copper sleeve 31.

[0040] In a preferred embodiment, a first oil injection hole 34 is provided through the side wall of the sliding sleeve 30, and a second oil injection hole 35 is provided through the side wall of the copper sleeve 31. Lubricating oil can be injected into the first oil injection hole 34, and the lubricating oil is discharged into the gap between the lifting cylinder 14 and the copper sleeve 31 through the second oil injection hole 35, thereby providing lubrication for the circumferential transfer of the lifting cylinder 14.

[0041] A spiral oil passage 36 is preferably provided on the inner wall of the copper sleeve 31. The aforementioned second oil injection hole 35 is adapted to connect to the spiral oil passage 36. Lubricating oil can be discharged into the spiral oil passage 36 through the second oil injection hole 35, and then the lubricating oil can flow along the spiral oil passage 36 to cover the inner wall of the copper sleeve 31 to the greatest extent, so as to achieve a more uniform and wider-range lubrication effect on the lifting cylinder 14. For example, the second oil injection hole 35 can preferably be constructed in the middle or top of the spiral oil passage 36 so that the lubricating oil can flow automatically along the spiral oil passage 36 under the action of gravity.

[0042] On the inner wall of the copper sleeve 31, annular grooves 37 can be constructed at both ends of the spiral oil passage 36. The upper and lower ends of the spiral oil passage 36 are respectively connected to the two annular grooves 37, which helps to keep the lubricating oil within the annular grooves 37 and prevents leakage. In a preferred embodiment, an oil receiving tray 38 can be provided at the bottom end of the lifting cylinder 14. Even if the lubricating oil leaks, it will flow down the outer wall of the lifting cylinder 14 into the oil receiving tray 38, preventing the lubricating oil from dripping onto the bottle cap and causing contamination. For example, a negative pressure liquid extraction system can also be attached to the oil receiving tray 38 to promptly extract the lubricating oil collected in the oil receiving tray 38, thus preventing oil overflow from the oil receiving tray 38.

[0043] In some embodiments, a second cam 20 is provided on the frame 1 below the rotating disk 2, and the inner cover rotation station 8 includes a mounting base 21 that slides axially to fit the rotating disk 2. The bottom end of the mounting base 21 engages with the third cam surface 39 on the second cam 20. A motor 22 is also provided on the mounting base 21, and a chuck 23 is provided on the rotation shaft of the motor 22. As the rotating disk 2 rotates, the mounting base 21 is axially transferred under the push of the third cam surface 39. For example, when the inner cover needs to be rotated to adjust its circumferential position angle, the chuck 23 is transferred through the connecting hole 24 on the rotating disk 2 and extends into the inner cover; subsequently, the motor 22 drives the chuck 23 to rotate, thereby causing the inner cover to rotate.

[0044] For example, the end face of the latch 23 may preferably be provided with a plurality of circumferentially distributed engagement teeth 26. After the latch 23 is inserted into the inner cover, the protrusions in the inner wall of the inner cover will engage in the gaps between adjacent engagement teeth 26, making it easier for the latch 23 to rotate and reliably drive the inner cover to rotate. In a preferred example, the top surface of each engagement tooth 26 may be constructed with an arc surface 40 oriented to both sides, thereby facilitating the protrusions to engage more smoothly in the gaps between adjacent engagement teeth 26 under the guidance of the arc surface 40.

[0045] Several weight-reducing grooves 28 can also be opened along the circumferential direction of the main body of the second cam 20 to reduce the load on the frame 1.

[0046] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A lubrication structure for an outer cover clamping mechanism, characterized in that: It includes a sliding sleeve (30) disposed on the connecting plate (13), the sliding sleeve (30) being adapted to slide with the lifting cylinder (14), a first oil injection hole (34) being provided through the side wall of the sliding sleeve (30), and an oil receiving plate (38) being provided at the bottom end of the lifting cylinder (14).

2. The lubrication structure for the outer cover clamping mechanism according to claim 1, characterized in that: A spline guide structure is adapted between the sliding sleeve (30) and the lifting cylinder (14).

3. The lubrication structure for the outer cover clamping mechanism according to claim 1, characterized in that: The oil receiving tray (38) is equipped with a negative pressure liquid extraction system.

4. The lubrication structure for the outer cover clamping mechanism according to claim 1, characterized in that: A copper sleeve (31) is provided inside the sliding sleeve (30), and a second oil injection hole (35) is provided through the side wall of the copper sleeve (31), which is opposite to the first oil injection hole (34).

5. The lubrication structure for the outer cover clamping mechanism according to claim 4, characterized in that: A fixed through groove (32) is provided through the side wall of the sliding sleeve (30), and a fixed blind groove (33) is provided correspondingly on the side wall of the copper sleeve (31). Fixed keys are adapted in the fixed through groove (32) and the fixed blind groove (33).

6. The lubrication structure for the outer cover clamping mechanism according to claim 4, characterized in that: A spiral oil passage (36) is provided on the inner wall of the copper sleeve (31), and the second oil injection hole (35) is connected to the spiral oil passage (36).

7. The lubrication structure for the outer cover clamping mechanism according to claim 6, characterized in that: The second oil injection hole (35) is located at the top or middle of the spiral oil passage (36).

8. The lubrication structure for the outer cover clamping mechanism according to claim 6 or 7, characterized in that: The inner wall of the copper sleeve (31) is provided with annular grooves (37) at both ends of the spiral oil passage (36), and the two ends of the spiral oil passage (36) are respectively connected to the two annular grooves (37).

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