A polishing machine

Abstract

The present invention discloses a polishing machine, which includes a fixing frame. The lifting mechanism is cooperatively connected to the fixing frame and the lifting plate. A plurality of reverse boxes are provided, and the plurality of reverse boxes are respectively equidistantly installed on the lifting plate. An external pipe is rotatably connected in each reverse box, and an internal pipe is rotatably connected in the external pipe. The polishing mechanism adopts the reverse rotation mechanism of the external pipe and the internal pipe in the reverse box to achieve simultaneous polishing of the inner and outer walls of the metal bottle cap, effectively improving the polishing efficiency. The polishing and grinding rings on the external disk and the grinding blocks on the internal disk respectively polish the outer wall and the inner wall of the bottle cap, ensuring the comprehensiveness and effect of the polishing. In addition, the treatment of the upper end surface of the bottle cap by the polishing and grinding disk further optimizes the entire polishing process. The design of the expansion spring and the annular sleeve enables the grinding block to be flexibly adjusted to effectively polish the inner wall of the bottle cap. The configuration of a plurality of reverse boxes can perform batch processing, significantly improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of polishing equipment, and more specifically, it relates to a polishing machine. Background Art

[0002] Metal bottle caps are important components widely used in the packaging industries such as food, beverages, and pharmaceuticals. Their main function is to ensure the sealing and safety of packaging containers. Metal bottle caps are usually made of metal materials such as aluminum alloy, stainless steel, or tinplate, and have good corrosion resistance, mechanical strength, and sealing performance. In the current metal bottle cap production technology, there are significant problems in the efficiency and quality control of the bottle cap edge polishing and trimming process. The traditional polishing and trimming method usually processes the bottle caps one by one on a plate chain. This method is inefficient in large-scale production. Due to the huge production volume of bottle caps, this one-by-one processing method limits the efficiency of the entire production process. Workers or automated equipment on the production line must invest a large amount of time to process each bottle cap, which not only prolongs the production cycle but also increases the labor and equipment costs, thus affecting the market competitiveness of the product.

[0003] In addition, there are also deficiencies in the quality control of existing polishing and trimming technologies. Conventional polishing and trimming processes often can only polish and trim one side of the bottle cap, ignoring the fact that burrs may appear on both ends of the bottle cap. During the bottle cap forming process, due to the properties of the metal material and the influence of the mold, burrs may form at multiple positions. Unilateral polishing and trimming cannot completely remove these burrs, resulting in an unsatisfactory polishing and trimming effect. This not only affects the appearance quality of the bottle cap but may also cause safety problems during actual use, such as scratching the user's hand or affecting the sealing effect between the bottle cap and the bottle body. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the problems existing in the prior art, the present invention provides a polishing machine to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A polishing machine, including a fixing frame installed on an external device. A grinding mechanism is provided on the fixing frame. The grinding mechanism includes a lifting mechanism, a lifting plate, a reversing box, an external pipe, an internal pipe, an external disk, a polishing and grinding ring, a polishing and grinding disk, an internal disk, an expansion spring, a grinding block, an annular sleeve, and a fixing mechanism. The lifting mechanism is cooperatively connected to the fixing frame and the lifting plate. A plurality of reversing boxes are provided, and the plurality of reversing boxes are respectively equidistantly installed on the lifting plate. An external pipe is rotatably connected inside each reversing box, and an internal pipe is rotatably connected inside the external pipe. An external disk is coaxially installed on the external pipe, and a polishing and grinding ring is installed on the lower end surface of the external disk. A polishing and grinding disk is coaxially installed on the internal pipe, and the polishing and grinding disk is attached to the lower end surface of the external disk. An internal disk is installed on the polishing and grinding disk. A plurality of the expansion springs are equidistantly installed on the outer wall of the internal disk. A grinding block is installed on each expansion spring, and the plurality of grinding blocks are respectively slidably attached to the polishing and grinding disk. An annular sleeve is connected between every two grinding blocks. The fixing mechanism is installed on the fixing frame.

[0008] The present invention is further configured such that each reversing box is respectively provided with a polishing and grinding motor. A middle gear is provided on the extending end of the polishing and grinding motor. An external gear is coaxially provided on the external pipe, and an internal gear is coaxially provided on the internal pipe. The internal gear and the external gear are respectively meshed with the middle gear at the upper and lower ends synchronously. This design drives the middle gear through the polishing and grinding motor, and then drives the external gear and the internal gear to rotate in opposite directions, realizing the reverse movement of the external pipe and the internal pipe, so that the polishing and grinding ring and the grinding block can simultaneously perform reverse grinding on the inner and outer walls of the bottle cap, improving the grinding efficiency and effect, and at the same time reducing the offset of the bottle cap during grinding due to rotation, ensuring the accuracy of grinding.

[0009] The present invention is further configured such that the lifting mechanism includes side frames, lifting motors, lead screws, and lifting sleeves. Two side frames are provided, and the two side frames are respectively installed on both sides of the fixing frame. A lifting motor is installed on each side frame. A lead screw is installed on the extending end of the lifting motor. The lead screw is rotatably connected to the side frame. The lifting sleeve is threadedly connected to the lead screw, and the lifting sleeve is slidably connected inside the side frame. The lifting plate is connected to the two lifting sleeves. This design drives the lead screws synchronously through the lifting motors on both sides, realizing the control of the lifting sleeves, and further ensuring the smooth movement of the lifting plate. The design of bilateral synchronous lifting ensures that multiple metal bottle caps can be ground simultaneously, significantly improving the production efficiency, and at the same time ensuring the stability and consistency of the grinding process.

[0010] The present invention is further configured such that the fixing mechanism includes a fixing sleeve, guiding blocks, sliding blocks, guiding springs, fitting plates, and springs. A plurality of guiding blocks are provided, and the plurality of guiding blocks are respectively equidistantly mounted on the fixing sleeve. Oblique grooves are respectively formed on both sides of each guiding block, and sliding blocks are slidably connected to the oblique grooves. The upper and lower ends of each sliding block are respectively connected to guiding springs, and the upper and lower ends of the guiding springs are respectively connected to the fitting plates. Springs are mounted on the fitting plates and connected to the sliding blocks. A plurality of friction grooves are equidistantly formed on the fitting plates. This design realizes the positioning and adjustment of the fitting plates through the combination of the guiding blocks, sliding blocks, and oblique grooves. The use of the guiding springs provides a guiding effect for the metal bottle caps, ensuring the convenience during the installation of the bottle caps. The arrangement of the friction grooves increases the contact area with the bottle caps, further improving the fixing effect. The overall design realizes the efficient, stable, and adjustable bottle cap fixing function.

[0011] The present invention is further configured such that a driving motor is provided on the fixing frame. A driving chain is meshed on the protruding end of the driving motor. A driving shaft is rotatably provided on the fixing frame, and the driving chain is meshed on the driving shaft. A conveying chain is meshed on the driving shaft, and the conveying chain is rotatably connected to the fixing frame. A receiving plate is provided on the conveying chain, and the fixing sleeve is mounted on the receiving plate. This design realizes the automatic conveying of the fixing sleeve by driving the driving chain and the conveying chain through the driving motor, improving the operating efficiency of the production line. The arrangement of the receiving plate provides stable support for the fixing sleeve, ensuring the stability of the bottle caps during the conveying process.

[0012] The present invention is further configured such that synchronous sleeves are slidably provided on the outer walls of the plurality of guiding blocks. A plurality of transverse rods are respectively provided on each sliding block. A plurality of transverse holes are equidistantly formed on the side walls of the synchronous sleeves, and the transverse rods are slidably connected to the transverse holes. This design realizes the synchronous movement of the plurality of sliding blocks through the cooperation of the synchronous sleeves and the transverse rods, ensuring the uniform fixing of the bottle caps. The arrangement of the transverse holes ensures the follow-up movement of the sliding blocks and the transverse rods, improving the usage effect.

[0013] The present invention is further configured such that a plurality of synchronous sleeves are provided, and follower sleeves are respectively provided on the plurality of synchronous sleeves. Bearing plates are respectively provided on the plurality of follower sleeves. Return springs are respectively provided on the lower end surfaces of each synchronous sleeve. An annular groove is formed on the upper end surface of the fixing sleeve, and the return springs are pressed in the annular groove. This design ensures that the bottle caps are not in a fixed state when not polished and trimmed through the cooperation of the follower sleeves and the bearing plates, thereby ensuring the convenience of loading and unloading.

[0014] The present invention is further configured such that adjusting rods are respectively and slidably provided on both sides of the lifting plate. Nuts are threadedly provided on the adjusting rods, and the nuts are in contact with the lifting plate. Compression springs are sleeved on the adjusting rods. One end of the compression spring is connected to the adjusting rod, and the other end of the compression spring abuts against the lower end surface of the lifting plate. The adjusting rods press on the bearing plate. This design realizes the adjustment of the height of the metal bottle cap through the cooperation of the adjusting rods and the nuts, and the use of the compression springs ensures the fixing stability of the adjusting rods.

[0015] The present invention is further configured such that bottom sleeves are respectively provided on the lower end surfaces of each of the fixed sleeves. Bottom rods are respectively threadedly provided on each of the bottom sleeves. A tray is provided on the bottom rods. Hexagonal holes are formed at the axial center positions of the tray and the bottom rods. This design realizes the adjustment of the height of the push plate through the threaded connection of the bottom sleeves and the bottom rods, so that adjustment can be made according to different situations. The setting of the hexagonal holes facilitates the use of tools for adjustment and improves the convenience of operation.

[0016] The present invention is further configured such that a bottom plate is provided at one end of the bottom rod away from the tray. A fixing spring is provided on the bottom plate. A fixing ring is provided on the fixing spring, and the fixing ring abuts against the lower end surface of the bottom sleeve. This design realizes the fixing of the position of the bottom rod through the cooperation of the bottom plate, the fixing spring and the fixing ring, and ensures the stability after adjustment.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a polishing machine, which has the following beneficial effects:

[0019] 1. The polishing mechanism adopts the reverse rotation mechanism of the outer tube and the inner tube in the reverse box, realizing the simultaneous polishing of the inner and outer walls of the metal bottle cap, effectively improving the polishing efficiency. The polishing and grinding rings on the outer disc and the grinding blocks on the inner disc respectively polish the outer wall and the inner wall of the bottle cap, ensuring the comprehensiveness and effect of the polishing. In addition, the treatment of the upper end surface of the bottle cap by the polishing disc further optimizes the entire polishing process. The design of the expansion spring and the annular sleeve enables the grinding blocks to be flexibly adjusted to effectively polish the inner wall of the bottle cap. The configuration of multiple reverse boxes allows for batch processing, significantly improving the production efficiency.

[0020] 2. The lifting mechanism drives the lead screw through the lifting motors installed on the side frames on both sides, realizing the precise control of the lifting sleeve and ensuring the smooth movement of the lifting plate. The design of bilateral synchronous lifting enables multiple metal bottle caps to be polished simultaneously, thus improving the production efficiency. The design of the adjusting rod and the bearing plate allows the operator to adjust the contact position according to needs, enhancing the flexibility of the equipment. The application of the compression spring provides the necessary downward pressure during the adjustment process, ensuring that a large fixing force is only applied during polishing. The overall design ensures an efficient and precise polishing and trimming process.

[0021] 3. The fixing mechanism realizes the stable fixation of the metal bottle cap through the combination of the fixing sleeve, the guiding block and the sliding block. The design of the fitting plate and the spring provides appropriate pressure to ensure that the bottle cap remains fixed during the polishing process. The setting of the friction groove increases the contact area with the bottle cap, further improving the fixing effect. The design of the synchronous sleeve and the follower sleeve enables multiple fixing devices to operate synchronously, improving work efficiency. The adjustable design of the bottom sleeve, the bottom rod and the tray allows the operator to adjust the height according to bottle caps of different sizes, expanding the applicable range of the equipment. The use of the fixing spring and the fixing ring ensures the stability after adjustment. The overall design realizes the efficient, stable and adjustable bottle cap fixing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of a polishing machine in the present invention;

[0023] Figure 2 is the structural schematic diagram of the lifting mechanism and the fixing mechanism in the present invention;

[0024] Figure 3 is the structural schematic diagram of the lifting plate, the bearing plate and the receiving plate in the present invention;

[0025] Figure 4 is the structural schematic diagram of the reversing box in the present invention;

[0026] Figure 5 in the present invention Figure 4 is the schematic diagram of the upper end face sectional structure;

[0027] Figure 6 in the present invention Figure 4 is the schematic diagram of the side sectional structure;

[0028] Figure 7 is the structural schematic diagram of the fixing mechanism in the present invention;

[0029] Figure 8 in the present invention Figure 7 is the schematic diagram of the sectional structure;

[0030] Figure 9 is the structural schematic diagram of the sliding block and the fitting plate in the present invention;

[0031] Figure 10 is the structural schematic diagram of the fixing sleeve and the guiding block in the present invention;

[0032] Figure 11 is the structural schematic diagram of the synchronous sleeve in the present invention.

[0033] In the figure: 1, fixing frame; 2, lifting plate; 3, reverse box; 4, external pipe; 5, internal pipe; 6, external disc; 7, polishing and grinding ring; 8, polishing and grinding disc; 9, internal disc; 10, expansion spring; 11, grinding block; 12, annular sleeve; 13, polishing and grinding motor; 14, intermediate gear; 15, external gear; 16, internal gear; 17, side frame; 18, lifting motor; 19, lead screw; 20, lifting sleeve; 21, fixing sleeve; 22, guiding block; 23, sliding block; 24, guiding spring; 25, fitting plate; 26, spring; 27, inclined groove; 28, friction groove; 29, driving motor; 30, driving chain; 31, driving shaft; 32, conveying chain; 33, receiving plate; 34, synchronizing sleeve; 35, cross bar; 36, cross hole; 37, follower sleeve; 38, bearing plate; 39, return spring; 40, annular groove; 41, adjusting rod; 42, nut; 43, compression spring; 44, bottom sleeve; 45, bottom rod; 46, tray; 47, hexagonal hole; 48, bottom disc; 49, fixing spring; 50, fixing ring. Detailed implementation manners

[0034] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0036] In the present invention, unless otherwise stated, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inner, outer" refer to the inner and outer of the contours of the respective components, but the above orientation terms are not used to limit the present invention.

[0037] Please refer to Figures 3 to 6 and Figures 7 to 11, a polishing machine, comprising a fixing frame 1, the fixing frame 1 is installed on an external device, a grinding mechanism is arranged on the fixing frame 1, the grinding mechanism includes a lifting mechanism, a lifting plate 2, a reversing box 3, an external pipe 4, an internal pipe 5, an external disc 6, a polishing and grinding ring 7, a polishing and grinding disc 8, an internal disc 9, an expansion spring 10, a grinding block 11, an annular sleeve 12 and a fixing mechanism. The lifting mechanism is cooperatively connected to the fixing frame 1 and the lifting plate 2. There are multiple reversing boxes 3, and the multiple reversing boxes 3 are respectively equidistantly installed on the lifting plate 2. An external pipe 4 is rotatably connected in each reversing box 3, and an internal pipe 5 is rotatably connected in the external pipe 4. The external disc 6 is coaxially installed on the external pipe 4, the polishing and grinding ring 7 is installed on the lower end surface of the external disc 6, the polishing and grinding disc 8 is coaxially installed on the internal pipe 5, and the polishing and grinding disc 8 is attached to the lower end surface of the external disc 6. The internal disc 9 is installed on the polishing and grinding disc 8, multiple expansion springs 10 are equidistantly installed on the outer wall of the internal disc 9, a grinding block 11 is installed on each expansion spring 10, the multiple grinding blocks 11 are respectively slidably attached to the polishing and grinding disc 8, and an annular sleeve 12 is connected between every two grinding blocks 11. The fixing mechanism is installed on the fixing frame 1. A polishing and grinding motor 13 is provided on each reversing box 3, an intermediate gear 14 is provided on the extending end of the polishing and grinding motor 13, an external gear 15 is coaxially provided on the external pipe 4, an internal gear 16 is coaxially provided on the internal pipe 5, and the internal gear 16 and the external gear 15 are respectively meshed with the intermediate gear 14 synchronously at the upper and lower ends.

[0038] Working principle: When grinding, polishing, and trimming the corresponding metal bottle caps, first, a feeding device is used to install multiple metal bottle caps in multiple fixing sleeves 21 respectively. At this time, the metal bottle caps are attached to the tray 46, and the attaching plate 25 and the side wall of the metal bottle cap are not in contact but only in a limiting state. And the guiding spring 24 ensures that the metal bottle caps can be conveniently placed between multiple attaching plates 25. Then, when the metal bottle caps are transported to the coaxial position of multiple inner discs 9, they stop. At this time, the lifting mechanism can drive the lifting plate 2 to move downward. Since the length of the adjusting rod 41 is greater than the length of multiple polishing and grinding discs 8, the adjusting rod 41 on the lifting plate 2 will first press on the bearing plate 38, and then continue to compress downward. At this time, the adjusting rod 41 presses the lifting plate 2 to slide upward and the compression spring 43 is in a compressed state. Then, the bearing plate 38 slides downward, and multiple follower sleeves 37 are attached to the bearing plate 38. Then, the synchronous sleeves 34 on multiple follower sleeves 37 will slide downward synchronously. Since the transverse rod 35 is connected in the transverse hole 36, it will drive multiple sliders 23 to slide along the inclined groove 27. At this time, the sliders 23 will contract and slide downward along the inclined groove 27. Since the attaching plate 25 is in contact with the side wall of the metal bottle cap at this time, the spring 26 will continue to be compressed, thus ensuring that the metal bottle cap is in a fixed state. Then, the lifting plate 2 continues to move downward, and then the polishing and grinding ring 7 is attached to the outer wall of the metal bottle cap, multiple grinding blocks 11 are attached to the inner wall of the metal bottle cap, and the polishing and grinding disc 8 is attached to the upper end surface of the metal bottle cap. At this time, all three surfaces of the metal bottle cap are in a contacting state. Then, start multiple polishing and grinding motors 13. Since the intermediate gears 14 are installed on the extending ends of the polishing and grinding motors 13, multiple intermediate gears 14 can be driven to rotate. Since the internal gear 16 and the external gear 15 are respectively engaged on the upper and lower sides of the intermediate gear 14, the internal gear 16 and the external gear 15 will be driven to rotate in opposite directions, so that the outer tube 4 and the inner tube 5 rotate in opposite directions. Since the outer disc 6 is installed on the outer tube 4, the polishing and grinding ring 7 can be driven to polish the outer wall of the metal bottle cap. At this time, the inner disc 9 rotates in the opposite direction, and the follow-up rotation can generate a large centrifugal force, which will drive the grinding blocks 11 to expand outward. Due to the action of the annular sleeve 12, the connection between multiple grinding blocks 11 can be ensured, and the expansion of the grinding blocks 11 is limited by the expansion spring 10. At this time, multiple grinding blocks 11 will polish the inner wall of the metal bottle cap. Then, the grinding blocks 11 and the polishing and grinding ring 7 can polish the metal bottle cap inside and outside in opposite directions. Since the inner and outer sides are in opposite motions, the situation that the metal bottle cap rotates along with the grinding can be avoided, and the fixing effect is improved. Then, the polishing and grinding disc 8 can polish the upper end surface of the metal bottle cap. Thus, the polishing of the three surfaces of the metal bottle cap is completed, and the trimming of the inner side, outer side, and upper end surface is completed. And multiple metal bottle caps can be trimmed, thus completing the process of edge polishing and trimming, ensuring the polishing and trimming efficiency of the metal bottle cap.The overall operating speed is improved. When the polishing and finishing are completed, the return spring 39 ensures the upward sliding of the synchronizing sleeve 34. At this time, since the pressing plate 38 is not in the downward pressing state after the polishing and finishing, the connection between the fitting plate 25 and the metal bottle cap will be released, and then the blanking process can be carried out.

[0039] To achieve synchronous lifting, a lifting mechanism is added. Please refer to Figures 1 to 2 The lifting mechanism includes side frames 17, lifting motors 18, lead screws 19, and lifting sleeves 20. There are two side frames 17, and the two side frames 17 are respectively installed on both sides of the fixed frame 1. A lifting motor 18 is installed on each side frame 17. A lead screw 19 is installed on the extending end of the lifting motor 18. The lead screw 19 is rotatably connected to the side frame 17. The lifting sleeve 20 is threadedly connected to the lead screw 19. The lifting sleeve 20 is slidably connected inside the side frame 17. The lifting plate 2 is connected to the two lifting sleeves 20.

[0040] Working principle: When it is necessary to move up and down, first, the two lifting motors 18 rotate synchronously, and then the rotation of the lead screw 19 will be driven. Since the lead screw 19 is threadedly connected to the lifting sleeve 20 and the lifting sleeve 20 is limited and slidably connected to the side frame 17, the two lifting sleeves 20 will be driven to lift and lower synchronously, thus ensuring the synchronous grinding of multiple metal bottle caps. When it is necessary to change the contact position between the adjusting rod 41 and the pressing plate 38, the compression amount of the compression spring 43 can be changed by rotating the nut 42, so the initial position of the adjusting rod 41 will be changed, and thus the adjustment of the contact position can be completed.

[0041] Please refer to Figures 7 to 11, in order to realize the fixation of the bottle cap, a fixing mechanism is added. The fixing mechanism includes a fixing sleeve 21, a guiding block 22, a sliding block 23, a guiding spring 24, a fitting plate 25 and a spring 26. There are multiple guiding blocks 22, and the multiple guiding blocks 22 are respectively and equidistantly installed on the fixing sleeve 21. Oblique grooves 27 are respectively opened on both sides of each guiding block 22, and sliding blocks 23 are slidably connected to the oblique grooves 27. The upper and lower ends of the sliding block 23 are respectively connected with guiding springs 24, and the upper and lower ends of the guiding springs 24 are respectively connected to the fitting plate 25. A spring 26 is installed on the fitting plate 25, and the spring 26 is connected to the sliding block 23. Multiple friction grooves 28 are equidistantly opened on the fitting plate 25. A driving motor 29 is provided on the fixing frame 1, a driving chain 30 is meshed on the extending end of the driving motor 29, a driving shaft 31 is rotatably provided on the fixing frame 1, the driving chain 30 is meshed on the driving shaft 31, a conveying chain 32 is meshed on the driving shaft 31, the conveying chain 32 is rotatably connected to the fixing frame 1, a receiving plate 33 is provided on the conveying chain 32, the fixing sleeve 21 is installed on the receiving plate 33, a synchronous sleeve 34 is slidably provided on the outer walls of the multiple guiding blocks 22, multiple transverse rods 35 are respectively provided on each sliding block 23, multiple transverse holes 36 are equidistantly opened on the side wall of the synchronous sleeve 34, and the transverse rods 35 are slidably connected in the transverse holes 36. There are multiple synchronous sleeves 34, and follower sleeves 37 are respectively provided on the multiple synchronous sleeves 34, bearing plates 38 are respectively provided on the multiple follower sleeves 37, a return spring 39 is respectively provided on the lower end surface of each synchronous sleeve 34, an annular groove 40 is opened on the upper end surface of the fixing sleeve 21, and the return spring 39 is pressed in the annular groove 40. Adjusting rods 41 are respectively slidably provided on both sides of the lifting plate 2, nuts 42 are threaded on the adjusting rods 41, the nuts 42 are attached to the lifting plate 2, a compression spring 43 is sleeved on the adjusting rod 41, one end of the compression spring 43 is connected to the adjusting rod 41, and the other end of the compression spring 43 abuts against the lower end surface of the lifting plate 2. The adjusting rod 41 presses on the bearing plate 38. A bottom sleeve 44 is respectively provided on the lower end surface of each fixing sleeve 21, a bottom rod 45 is respectively threaded on each bottom sleeve 44, a tray 46 is provided on the bottom rod 45, hexagonal holes 47 are opened at the axial center positions of the tray 46 and the bottom rod 45, a bottom plate 48 is provided at the end of the bottom rod 45 away from the tray 46, a fixing spring 49 is provided on the bottom plate 48, and a fixing ring 50 is provided on the fixing spring 49, and the fixing ring 50 abuts against the lower end surface of the bottom sleeve 44.

[0042] Working principle: When it is necessary to adjust the height of the metal bottle cap within the fixed sleeve 21, first insert a wrench into the hexagonal hole 47, and then rotate the bottom rod 45. The bottom rod 45 is threadedly connected to the bottom sleeve 44, so the position of the tray 46 can be changed. Since the metal bottle cap abuts against the tray 46, the fixed position of the metal bottle cap can be changed, and thus corresponding adjustments can be made. Since there is a fixing spring 49 on the bottom plate 48, and the fixing ring 50 on the fixing spring 49 continuously abuts against the bottom sleeve 44, when adjusting at multiple positions, the tray 46 can always be maintained with a relatively large fixing force. After the metal bottle caps are placed between the plurality of fitting plates 25 through the feeding mechanism, as the plurality of synchronous sleeves 34 slide downward, the transverse rod 35 slides along the transverse hole 36, causing the slider 23 to slide along the inclined groove 27. At this time, the slider 23 is in a state of both downward movement and expansion. Therefore, the fitting plate 25 can not only provide a relatively large fixing force, but also enable the metal bottle cap to have a downward force to fix with the tray 46, thus ensuring the stability of the fixation. The corresponding frictional force is provided by the continuous compression of the spring 26, thereby ensuring the use effect.

[0043] In all the solutions mentioned above, for the connection between two components, welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods can be selected according to the actual situation, which will not be elaborated one by one here. For those mentioned above that involve fixed connection, welding is preferably considered. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polishing machine, comprising a fixed frame (1): the fixed frame (1) is mounted on an external device, and a polishing mechanism is provided on the fixed frame (1); The grinding mechanism comprises a lifting mechanism, a lifting plate (2), a reversing box (3), an external tube (4), an internal tube (5), an external disc (6), a polishing and grinding ring (7), a polishing and grinding disc (8), an internal disc (9), an expansion spring (10), a grinding block (11), an annular sleeve (12) and a fixing mechanism. The lifting mechanism is connected to a fixing frame (1) and the lifting plate (2) in a coordinated manner. A plurality of reversing boxes (3) are provided, and the plurality of reversing boxes (3) are respectively and equidistantly mounted on the lifting plate (2). Each of the reversing boxes (3) is rotatably connected to the external tube (4), and the external tube (4) is rotatably connected to the internal tube (5). The external disc (6) is coaxially mounted on the external tube (4), and the polishing and grinding ring (7) is mounted on the external disc (6). The lower end surface, the polishing and grinding disc (8) is coaxially mounted on the inner tube (5), and the polishing and grinding disc (8) is fitted on the lower end surface of the outer disc (6), the inner disc (9) is mounted on the polishing and grinding disc (8), a plurality of expansion springs (10) are equidistantly mounted on the outer wall of the inner disc (9), each expansion spring (10) is respectively mounted with a grinding block (11), the plurality of grinding blocks (11) are respectively slidably fitted on the polishing and grinding disc (8), an annular sleeve (12) is respectively connected between each two of the grinding blocks (11), the fixing mechanism is mounted on the fixing frame (1), each of the reversing boxes (3) is respectively provided with a polishing and grinding motor (13), and an intermediate gear (14) is provided on the protruding end of the polishing and grinding motor (13), wherein the fixing mechanism is mounted on the fixing frame (1), and each of the reversing boxes (3) is respectively provided with a polishing and grinding motor (13), and a middle gear (14) is provided on the protruding end of the polishing and grinding motor (13), wherein the fixing mechanism is characterized in that: The fixing mechanism comprises a fixing sleeve (21), a guide block (22), a slider (23), a guide spring (24), a bonding plate (25) and a spring (26). A plurality of guide blocks (22) are provided, and the plurality of guide blocks (22) are respectively mounted on the fixing sleeve (21) at equal distances. An inclined groove (27) is respectively provided on both sides of each guide block (22). The slider (23) is slidably connected to the inclined groove (27). The upper and lower ends of the slider (23) are respectively connected to the guide spring (24). The upper and lower ends of the guide spring (24) are respectively connected to the bonding plate (25). The bonding plate (25) is mounted with a spring (26). The spring (26) is connected to the slider (23). The bonding plate (25) is respectively provided with a plurality of friction springs (26) at equal distances. A groove (28), a transmission motor (29) is provided on the fixed frame (1), a transmission chain (30) is meshed on the extended end of the transmission motor (29), a drive shaft (31) is rotatably provided on the fixed frame (1), the transmission chain (30) is meshed on the drive shaft (31), a conveying chain (32) is meshed on the drive shaft (31), the conveying chain (32) is rotatably connected to the fixed frame (1), a receiving plate (33) is provided on the conveying chain (32), the fixed sleeve (21) is mounted on the receiving plate (33), a plurality of synchronous sleeves (34) are slidably provided on the outer walls of the guide blocks (22), each of the sliders (23) is respectively provided with a plurality of transverse rods (35), and a plurality of transverse holes (36) are equidistantly provided on the side wall of the synchronous sleeve (34) , a transverse rod (35) is slidably connected in the transverse hole (36), a plurality of the synchronous sleeves (34) are provided, and a plurality of the synchronous sleeves (34) are respectively provided with a follower sleeve (37), and a plurality of the follower sleeves (37) are respectively provided with a pressure plate (38), and a return spring (39) is respectively provided on the lower end surface of each of the synchronous sleeves (34), and an annular groove (40) is opened on the upper end surface of the fixed sleeve (21), and the return spring (39) is pressed in the annular groove (40), and adjusting rods (41) are respectively slidably provided on both sides of the lifting plate (2), and a nut (42) is threaded on the adjusting rod (41), and the nut (42) is fitted on the lifting plate (2), and a compression spring (43) is sleeved on the adjusting rod (41), and one end of the compression spring (43) is connected to The adjusting rod (41) is connected to the adjusting rod (41), and the other end of the compression spring (43) abuts against the lower end surface of the lifting plate (2). The adjusting rod (41) is pressed against the pressure plate (38). The lower end surface of each of the fixing sleeves (21) is provided with a bottom sleeve (44), and each of the bottom sleeves (44) is threadedly provided with a bottom rod (45). A tray (46) is provided on the bottom rod (45), and a hexagonal hole (47) is provided at the axial position of the tray (46) and the bottom rod (45). A bottom plate (48) is provided at one end of the bottom rod (45) away from the tray (46), and a fixing spring (49) is provided on the bottom plate (48). A fixing ring (50) is provided on the fixing spring (49), and the fixing ring (50) abuts against the lower end surface of the bottom sleeve (44).

2. A polishing machine according to claim 1, characterized in that: An external gear (15) is coaxially provided on the external tube (4), and an internal gear (16) is coaxially provided on the internal tube (5). The internal gear (16) and the external gear (15) are synchronously meshed with the intermediate gear (14) at upper and lower ends respectively.

3. A polishing machine according to claim 1, characterized in that: The lifting mechanism comprises a side frame (17), a lifting motor (18), a lead screw (19) and a lifting sleeve (20). Two side frames (17) are provided, and the two side frames (17) are respectively mounted on two sides of a fixed frame (1). A lifting motor (18) is respectively mounted on each side frame (17). A lead screw (19) is mounted on the protruding end of the lifting motor (18). The lead screw (19) is rotatably connected to the side frame (17). The lifting sleeve (20) is threadedly connected to the lead screw (19). The lifting sleeve (20) is slidably connected in the side frame (17). The lifting plate (2) is connected to the two lifting sleeves (20).

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