Anti-falling bottle cap screwing equipment

Abstract

The anti-falling bottle cap screwing equipment comprises a rack, a cam and a fixing ring are arranged at the top of the rack, a guide sliding groove is formed in the periphery of the cam, the guide sliding groove is provided with a first horizontal section, a downward concave station is formed in the guide sliding groove, and an inner gear ring is arranged on the inner wall of the fixing ring; a main shaft is rotationally connected between the cam and the bottom of the rack, rotates in the first rotating direction and is sleeved with a rotating body, a plurality of screwing mechanisms penetrate through the rotating body in the circumferential direction, the top end of the rotating body is in sliding fit with the guide sliding groove, and the bottom end of the rotating body is provided with a grabbing part, is further sleeved with a transmission gear and is connected with the inner gear ring through a transition gear; the rotating table rotates in the second rotating direction, a plurality of arc-shaped grooves are formed in the table top, and the arc-shaped grooves and the rotating body are provided with intersecting parts in the vertical direction; a supporting platform is arranged on one side of the grabbing part and located in the rotating direction of the grabbing part. The supporting platform is arranged, and the concave station is formed, so that when the screwing mechanism rotates to the position of the supporting platform, the screwing mechanism descends along the concave station, the bottle caps are completely embedded into the grabbing part, and the bottle caps are prevented from falling off.

Description

Technical Field

[0001] This application relates to the technical field of bottle cap encapsulation, and particularly relates to a bottle cap screwing device that prevents dropping. Background Art

[0002] After the existing beverage bottles are filled, a capping machine is usually used to screw the bottle caps onto the bottle bodies. For example, a capping machine device is provided in Patent CN202687906U. A cap feeding machine is also provided on one side of the capping machine to supply bottle caps to the capping machine and screw them onto the bottle bodies through a manipulator; there are multiple arc-shaped grooves on the rotating platform of the capping machine, so that the bottle caps are placed in the grooves and the tops are exposed from the grooves for transportation and capping. However, due to the limitation of the grooves, the manipulator can only grab the part of the bottle cap that is exposed from the groove when grabbing. Since the manipulator fails to fully grab the bottle cap, the bottle cap is likely to drop when the manipulator grabs and moves the bottle cap. At the same time, incomplete grabbing is also likely to cause incomplete screwing, affecting the overall screwing qualification rate. Summary of the Utility Model

[0003] The purpose of this application is to address the above problems and provide a bottle cap screwing device that prevents dropping, including:

[0004] A frame, on the top of which a cam is fixed. A guiding chute is provided on the outer circumference of the cam. The guiding chute has a first horizontal section, a first descending section, a second horizontal section, a first ascending section, and a second descending section that are connected end to end in sequence. The first horizontal section has a lower concave station. A fixed ring is provided around the cam on the top of the frame. An internal gear ring is provided on the inner wall of the fixed ring. A driving mechanism is also provided on the frame;

[0005] A main shaft, which is rotatably connected between the cam and the bottom of the frame in the vertical direction and can rotate self - clockwise in the first rotation direction under the drive of the driving mechanism; A rotating body is sleeved on the main shaft. Multiple screwing mechanisms are circumferentially penetrated through the rotating body. The top end of the screwing mechanism is slidably matched with the guiding chute, and its bottom end has a grasping part for grasping the bottle cap. A transmission gear is sleeved on the screwing mechanism above the rotating body. A transition gear is meshed between the transmission gear and the internal gear ring on the rotating body;

[0006] A cap feeding mechanism, which includes a rotating table that can rotate in the second rotation direction. The second rotation direction is opposite to the first rotation direction. Multiple arc - shaped grooves are provided circumferentially on the table surface of the rotating table for placing the bottle caps; There is an intersection part between the rotating table and the rotating body in the vertical direction, so that when the screwing mechanism rotates with the rotating body, it can correspond to the arc - shaped grooves in the vertical direction, and thus the grasping part can grab the bottle cap from the rotating table; A support platform is provided on one side of the rotating table, and the support platform is located in the rotation direction of the grasping part.

[0007] According to the technical solution provided in certain embodiments of the present application, it also includes a swivel support, which is located below the swivel body and sleeved on the main shaft. A plurality of bottle holders are circumferentially rotatably connected to the swivel support, and the plurality of bottle holders correspond one-to-one to the screwing mechanism respectively; a limiting mechanism is also sleeved on the main shaft between the swivel body and the swivel support, which is used to relatively fix the bottle body and the bottle holder.

[0008] According to the technical solutions provided in certain embodiments of the present application, a plurality of bottle holders are rotatably connected to the swivel support respectively, a reverse friction block is provided on one side of the bottle holder, and the reverse friction block and the side of the bottle holder close to each other can be in rolling contact, so that when the bottle holder rotates around the main axis driven by the swivel support and passes through the reverse friction block, it rotates along the second rotation direction under the action of the reverse friction block; a one-way bearing is provided between the bottle holder and the swivel support, so that the bottle holder can only rotate along the second rotation direction.

[0009] According to the technical solution provided in some embodiments of the present application, the side of the reverse friction block close to the bottle holder is an arc-shaped structure, and the bending direction of the arc-shaped structure is toward the side away from the bottle holder.

[0010] According to the technical solutions provided in certain embodiments of the present application, the screwing mechanism has an ejection portion, and the ejection portion is used to eject the bottle cap stuck in the gripping portion after the screwing mechanism completes the screwing action.

[0011] According to the technical solution provided in certain embodiments of the present application, the screwing mechanism has a first state and a second state. When in the first state, the ejection part extends out of the gripping part, allowing the bottle cap stuck in the gripping part to fall off; when in the second state, the ejection part is retracted by the gripping part.

[0012] According to the technical solution provided in certain embodiments of the present application, the screwing mechanism includes a sleeve, which is inserted into the rotating body and rotatably connected to the rotating body, the top of the sleeve is slidably matched with the guide groove, and the bottom end of the sleeve is provided with the grabbing portion, the ejection portion is provided in the sleeve, the outer periphery of the ejection portion is connected with an elastic member, the free end of the elastic member is fixed to the inner wall of the sleeve, a strip hole is opened on the sleeve near the rotating body, the strip hole extends in the vertical direction, a retaining ring is provided under the rotating body, the retaining ring is sleeved on the outer periphery of the sleeve and fixed to the ejection portion through the strip hole.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: The present application provides a cap screwing device for preventing dropping, including: a frame, a cam is fixed on the top of the frame, a guiding chute is provided on the outer periphery of the cam, the guiding chute has a first horizontal section, a first descending section, a second horizontal section, a first ascending section and a second descending section that are connected end to end in sequence, the first horizontal section has a concave working position, a fixed ring is provided around the cam on the top of the frame, an internal gear ring is provided on the inner wall of the fixed ring, and a driving mechanism is also provided on the frame; a main shaft is rotatably connected between the cam and the bottom of the frame, and the main shaft can rotate around its own axis in the first rotation direction under the drive of the driving mechanism; a rotating body is sleeved on the main shaft, and a plurality of screwing mechanisms are circumferentially penetrated through the rotating body, the top end of the screwing mechanism is slidably matched with the guiding chute, and the bottom end thereof has a grasping part for grasping the cap, a transmission gear is sleeved on the screwing mechanism above the rotating body, and a transition gear is meshed between the transmission gear and the internal gear ring on the rotating body; a cap feeding mechanism is further included, the cap feeding mechanism includes a rotating table, the rotating table can rotate in the second rotation direction, the second rotation direction is opposite to the first rotation direction, a plurality of arc-shaped grooves are provided on the circumferential direction of the table surface of the rotating table, and the arc-shaped grooves are used for placing caps; there is an intersection part between the rotating table and the rotating body in the vertical direction, so that when the screwing mechanism rotates with the rotating body, it can correspond to the arc-shaped groove in the vertical direction, and further the grasping part can grasp the cap from the rotating table; a support platform is provided on one side of the rotating table, and the support platform is located in the rotation direction of the grasping part; by providing a support platform on one side of the rotating table and providing a concave working position on the first horizontal section of the guiding chute, the first horizontal section is the process of the screwing mechanism grasping the cap on the rotating table and rotating in the horizontal direction. When the screwing mechanism grasps the cap and rotates to the position of the support platform, it can descend along the concave working position so that the cap in the grasping part is completely embedded in the grasping part under the action of the support platform, realizing the full grip state of the grasping part on the cap, thereby avoiding the situation of cap dropping or incomplete screwing.

[0014] It should be understood that the description of technical features, technical solutions, beneficial effects or similar languages in the present application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that at least one embodiment includes specific technical features, technical solutions or beneficial effects. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of a bottle cap screwing device provided by an embodiment of the present application;

[0017] Figure 2 Structural schematic diagram of a guiding chute of a bottle cap screwing device provided by an embodiment of the present application;

[0018] Figure 3 Schematic diagram of the positional relationship among a rotating body, a rotating table, and a supporting platform of a bottle cap screwing device provided by an embodiment of the present application;

[0019] Figure 4 Structural schematic diagram of a bottle holder and a reverse friction block of a bottle cap screwing device provided by an embodiment of the present application;

[0020] Figure 5 Structural schematic diagram of a screwing mechanism of a bottle cap screwing device provided by an embodiment of the present application.

[0021] The text markings in the figure are indicated as:

[0022] 1. Frame; 2. Cam; 3. Fixed ring; 4. Main shaft; 5. Rotating body; 6. Rotating table; 7. Supporting platform; 8. Rotary support; 9. Limiting mechanism; 21. Guiding chute; 31. Internal gear ring; 51. Screwing mechanism; 52. Driving gear; 53. Intermediate gear; 81. Bottle holder; 82. Reverse friction block; 83. One-way bearing; 211. First horizontal section; 212. First descending section; 213. Second horizontal section; 214. First ascending section; 215. Second descending section; 511. Gripping part; 512. Bush; 513. Ejecting part; 514. Slot; 515. Retaining ring; 516. Rotating shaft; 2111. Lower concave station. Detailed implementation manners

[0023] To enable those skilled in the art to better understand the technical solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present application. Specifically, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] As mentioned in the background art, in view of the problems in the prior art, the present embodiment provides a cap screwing device for preventing dropping, including:

[0026] A frame 1, on the top of the frame 1 is fixed a cam 2, on the outer circumference of the cam 2 is provided a guiding chute 21, the guiding chute 21 has a first horizontal section 211, a first descending section 212, a second horizontal section 213, a first ascending section 214 and a second descending section 215 that are connected end to end in sequence. The first horizontal section 211 has a concave working position 2111. Around the cam 2 on the top of the frame 1 is provided a fixed ring 3, on the inner wall of the fixed ring 3 is provided an internal gear ring 31. On the frame 1 is also provided a driving mechanism;

[0027] A main shaft 4, the main shaft 4 is rotatably connected between the cam 2 and the bottom of the frame 1 in the vertical direction and can rotate self - clockwise in the first rotation direction under the drive of the driving mechanism; A rotating body 5 is sleeved on the main shaft 4, a plurality of screwing mechanisms 51 are circumferentially arranged on the rotating body 5. The top end of the screwing mechanism 51 is slidably matched with the guiding chute 21, and its bottom end has a grasping part 511 for grasping the cap. A transmission gear 52 is sleeved on the screwing mechanism 51 above the rotating body 5. Between the transmission gear 52 and the internal gear ring 31 on the rotating body 5 is engaged a transition gear 53;

[0028] A cap feeding mechanism, the cap feeding mechanism includes a rotating table 6, the rotating table 6 can rotate in the second rotation direction, the second rotation direction is opposite to the first rotation direction. A plurality of arc - shaped grooves are circumferentially arranged on the tabletop of the rotating table 6, and the arc - shaped grooves are used for placing caps; There is an intersecting part between the rotating table 6 and the rotating body 5 in the vertical direction, so that when the screwing mechanism 51 rotates with the rotating body 5, it can correspond to the arc - shaped grooves in the vertical direction, and thus the grasping part 511 can grasp the caps from the rotating table 6; On one side of the rotating table 6 is provided a support platform 7, and the support platform 7 is located in the rotation direction of the grasping part 511.

[0029] Such as Figure 1 、 Figure 2 and Figure 3As shown, the first rotation direction is the direction for tightening the bottle cap, and the second rotation direction is the direction for loosening the bottle cap; the frame 1 is of a frame structure, including a top plate and a base, and support columns are connected between the top plate and the base; the cam 2 is fixed on the top plate, and a guiding chute 21 is provided on the outer circumference of the cam 2. The opening of the guiding chute 21 faces the circumference of the cam 2. Thrust ball bearings are respectively provided at the top and bottom of the guiding chute 21. The guiding chute 21 can guide the screwing mechanism 51. Its first horizontal section 211 is the process in which the screwing mechanism 51 grabs the bottle cap on the rotating table 6 and rotates in the horizontal direction. The first descending section 212 is the process in which the screwing mechanism 51 descends towards the bottle body while rotating and screws the bottle cap onto the bottle body. The second horizontal section 213 is the process in which the bottle cap and the bottle body are screwed until the screwing is completed. The first ascending section 214 is the process in which after the screwing action is completed, the screwing mechanism 51 ascends to a height higher than the rotating table 6 in the vertical direction. The second descending section 215 is the process in which the screwing mechanism 51 approaches the rotating table 6 and grabs the bottle cap through the grabbing part 511. A fixed ring 3 is provided around the cam 2. The fixed ring 3 is approximately a cylindrical shell and is fixed on the top plate. An internal gear ring 31 is provided on its inner circle. The driving mechanism is used to drive the operation of the entire device.

[0030] The main shaft 4 is arranged vertically between the cam 2 and the base, and can rotate in the first rotation direction under the drive of the driving mechanism. A rotating body 5 is sleeved on the main shaft 4. The rotating body 5 is of a cylindrical structure. A plurality of screwing mechanisms 51 are uniformly penetrated along the edge of its circumference on the rotating body 5. The screwing mechanism 51 is rotationally connected to the rotating body 5. Its top end is arranged between the two thrust ball bearings in the guiding chute 21, and its bottom end has a rubber bowl, that is, the above-mentioned grabbing part 511, which can be buckled with the bottle cap by pressing down on the bottle cap to achieve grabbing. A transmission gear 52 is sleeved on the screwing mechanism 51. An intermediate gear 53 is also meshed between each transmission gear 52 and the internal gear ring 31 on the rotating body 5. In this embodiment, the intermediate gear 53 adopts a double gear, which is respectively meshed with the internal gear ring 31 and the transmission gear 52, and is used to conduct torque and enable the screwing mechanism 51 to rotate around the main shaft 4 in the first rotation direction under the drive of the rotating body 5, and can also rotate in the first rotation direction by itself, so as to tighten the bottle cap on the bottle body.

[0031] The cap feeding mechanism is mainly used to convey bottle caps for the capping machine to grasp. The rotating table 6 is approximately cylindrical in structure and can rotate at the same speed as the rotating body 5. The inner contour of the arc-shaped groove on the rotating table 6 matches the outer contour of the bottle cap and is used to place the bottle cap. The rotating table 6 and the rotating body 5 have an intersection in the vertical direction, so that the rotation trajectory of the bottle cap on the rotating table 6 and the rotation trajectory of the screwing mechanism 51 have a coincidence point. Then, when the screwing mechanism 51 rotates to the coincidence point position, it can grasp the bottle cap on the rotating table 6. The supporting platform 7 and the rotating table 6 are at the same height in the vertical direction. When the screwing mechanism 51 rotates to the first horizontal section 211 of the guiding chute 21, the grasping part 511 of the screwing mechanism 51 grasps the bottle cap and rotates horizontally. When it rotates to the concave working position 2111, the grasping part 511 contacts the tabletop of the supporting platform 7 at this time. The screwing mechanism 51 then descends along the concave working position 2111 so that the bottle cap held by the grasping part 511 can be completely embedded in the rubber bowl under the action of the supporting platform 7.

[0032] During use, start the screwing device. The driving mechanism drives the main shaft 4 to rotate. The rotating body 5 rotates in the first rotation direction, and the rotating table 6 rotates in the second rotation direction. The screwing mechanism 51 rotates around the main shaft 4 driven by the rotating body 5. When the screwing mechanism 51 rotates to the first horizontal section 211 of the guiding chute 21, its grasping part 511 grasps the bottle cap and rotates horizontally. When it rotates to the concave working position 2111, the grasping part 511 slides and contacts the tabletop of the supporting platform 7 at this time. The screwing mechanism 51 descends along the concave working position 2111, and then the bottle cap is completely embedded in the rubber bowl under the action of the supporting platform 7.

[0033] By arranging the supporting platform 7 on one side of the rotating table 6 and setting the concave working position 2111 on the first horizontal section 211 of the guiding chute 21, the first horizontal section 211 is the process in which the screwing mechanism 51 grasps the bottle cap on the rotating table 6 and rotates horizontally. When the screwing mechanism 51 grasps the bottle cap and rotates to the position of the supporting platform 7, it can descend along the concave working position 2111 so that the bottle cap held by the grasping part 511 is completely embedded in the grasping part 511 under the action of the supporting platform 7, realizing the full grip state of the grasping part 511 on the bottle cap, thus avoiding the situation of the bottle cap falling or the screwing being incomplete.

[0034] In a preferred embodiment, it further includes a slewing support 8. The slewing support 8 is located below the rotating body 5 and sleeved on the main shaft 4. A plurality of bottle brackets 81 are circumferentially and rotatably connected to the slewing support 8, and the plurality of bottle brackets 81 respectively correspond to the screwing mechanisms 51 one by one. A limiting mechanism 9 is also sleeved on the main shaft 4 between the rotating body 5 and the slewing support 8 and is used to relatively fix the bottle body and the bottle bracket 81.

[0035] As Figure 4As shown, the slewing bearing 8 is also a cylindrical structure. Along the circumferential edge of the slewing bearing 8, a plurality of bottle brackets 81 are evenly provided. The bottle bracket 81 and the screwing mechanism 51 correspond to each other in the vertical direction. A rubber pad is provided on the bearing plane of the bottle bracket 81 to increase the friction between the bearing plane and the bottom of the bottle. The limiting mechanism 9 includes a first turntable and a second turntable, which are sleeved on the main shaft 4 in the vertical direction. The outer circumferences of the first turntable and the second turntable are respectively provided with a first arc-shaped notch and a second arc-shaped notch. The first arc-shaped notch matches the contour of the bottleneck of the bottle, and the second arc-shaped notch matches the contour of the bottle body of the bottle, so as to limit the bottle body when screwing the bottle cap.

[0036] In a preferred embodiment, a plurality of bottle brackets 81 are respectively rotatably connected to the slewing bearing 8. A reverse friction block 82 is provided on one side of the bottle bracket 81. The reverse friction block 82 is in rolling contact with the side of the bottle bracket 81 close to each other, so that when the bottle bracket 81 rotates around the main shaft 4 driven by the slewing bearing 8 and passes through the reverse friction block 82, it rotates self - clockwise along the second rotation direction under the action of the reverse friction block 82. A one - way bearing 83 is also provided between the bottle bracket 81 and the slewing bearing 8, so that the bottle bracket 81 can only rotate self - clockwise.

[0037] As Figure 4 As shown, a plurality of bottle brackets 81 are respectively rotatably connected to the slewing bearing 8. The reverse friction block 82 is provided on one side of the bottle bracket 81 and is located on the stroke where the screwing mechanism 51 screws the bottle cap and the bottle body. When the bottle bracket 81 passes by, it can act on the bottle bracket 81 to make it rotate self - clockwise along the second rotation direction. The one - way bearing 83 can limit the rotation direction of the bottle bracket 81, so that the bottle bracket 81 can only rotate relative to the slewing bearing 8 along the second rotation direction, that is, the direction in which the bottle cap is tightened at the bottle mouth, to avoid when the internal thread of the bottle cap and the external thread of the bottle mouth are engaged to a certain extent, the shearing force applied by the screwing mechanism 51 to the bottle body through the bottle cap is greater than the friction force between the bottle body and the bottle bracket 81, and then the bottle body rotates with the bottle cap so that the bottle cap cannot be completely tightened with the bottle body.

[0038] By setting the rotatable bottle bracket 81 and providing a reverse friction block 82 that is in rolling contact with the bottle bracket 81 on one side of the bottle bracket 81, when the bottle bracket 81 rotates around the main shaft 4 driven by the slewing bearing 8 and passes through the reverse friction block 82, it rotates self - clockwise along the second rotation direction under the action of the reverse friction block 82. At the same time, when the screwing mechanism 51 rotates around the main shaft 4 driven by the rotating body 5, it rotates self - counterclockwise along the first rotation direction under the action of the internal gear ring 31 and the intermediate gear 53. When the screwing mechanism 51 grabs the bottle cap and descends to the bottle mouth for screwing, the bottle body and the bottle cap with opposite rotation directions can be rotationally matched to achieve quick recognition of the buckle, and avoid damage to the threads caused by the interaction between the bottle cap and the bottle mouth during the screwing process.

[0039] In a preferred embodiment, one side of the reverse friction block 82 close to the bottle bracket 81 is an arc structure, and the bending direction of the arc structure faces away from the bottle bracket 81.

[0040] As Figure 4 shown, the reverse friction block 82 is a double-arc structure, and the contour of its side close to the bottle bracket 81 matches the rotation trajectory of the bottle bracket 81 around the main shaft 4. The reverse friction block 82 with the arc structure can better act on the bottle bracket 81 during the rotation process, causing it to rotate self in the second rotation direction.

[0041] In a preferred embodiment, the screwing mechanism 51 has an ejection part 513, and the ejection part 513 is used to eject the bottle cap stuck in the grasping part 511 after the screwing mechanism 51 completes the screwing action.

[0042] In a preferred embodiment, the screwing mechanism 51 has a first state and a second state. When in the first state, the ejection part 513 extends out of the grasping part 511, which can cause the bottle cap stuck in the grasping part 511 to fall off; when in the second state, the ejection part 513 retracts from the grasping part 511.

[0043] As Figure 5 shown, when the screwing mechanism 51 rises under the guidance of the guiding chute 21, the ejection part 513 can extend out of the grasping part 511 to eject the bottle cap stuck in the grasping part 511, that is, the above-mentioned first state. When the screwing mechanism 51 descends under the guidance of the guiding chute 21, the ejection part 513 retracts from the grasping part 511 into the screwing mechanism 51, and the grasping part 511 can normally grasp the bottle cap, that is, the above-mentioned second state.

[0044] In a preferred embodiment, the screwing mechanism 51 includes a bushing 512. The bushing 512 is disposed through the rotating body 5 and is rotatably connected to the rotating body 5. The top end of the bushing 512 is slidably matched with the guiding chute 21. Its bottom end is provided with a grasping part 511. An ejection part 513 is provided inside the bushing 512. An elastic member is connected to the outer periphery of the ejection part 513, and the free end of the elastic member is fixed to the inner wall of the bushing 512. A strip-shaped hole 514 is opened at a position on the bushing 512 close to the rotating body 5. The strip-shaped hole 514 extends in the vertical direction. A retaining ring 515 is provided below the rotating body 5. The retaining ring 515 is sleeved on the outer periphery of the bushing 512 and is fixed to the ejection part 513 through the strip-shaped hole 514.

[0045] As Figure 5As shown, a fixed sleeve is further provided between the shaft sleeve 512 and the rotating body 5, and annular protrusions are provided at the upper and lower ends of the fixed sleeve, which can respectively abut against the upper and lower surfaces of the rotating body 5, so that the fixed sleeve and the rotating body 5 are relatively fixed in the vertical direction, and a thrust ball bearing is provided between the fixed sleeve and the rotating body 5, so that the fixed sleeve can be rotatably connected with the rotating body 5, and the top of the fixed sleeve is fixed to the transmission gear 52; a sliding key is fixed on the outer wall of the shaft sleeve 512, and a keyway is provided on the inner wall of the fixed sleeve and the transmission gear 52, and the transmission gear 52 and the fixed sleeve are connected to the shaft through the sliding key. The sleeve 512 is connected to the transmission gear 52 and the fixed sleeve in a transmission connection, and the sleeve 512 can slide in the vertical direction inside the transmission gear 52 and the fixed sleeve; the top of the sleeve 512 is connected to the rotating shaft 516, and the top of the rotating shaft 516 is rotatably connected to the slider, which is arranged in the guide slot 21 and can slide with the guide slot 21; the ejection part 513 is a long round rod, which is arranged inside the sleeve 512 and extends in the vertical direction. A spring is connected to the outer wall of the ejection part 513, and the free end of the spring is fixed to the inner wall of the sleeve 512. A strip hole 514 is provided at the position of the rotating body 5, and the strip hole 514 extends in the vertical direction. A retaining ring 515 is provided under the rotating body 5. The retaining ring 515 is sleeved on the outer periphery of the shaft sleeve 512 and fixed to the ejection part 513 through the strip hole 514. The retaining ring 515 can slide along the shaft sleeve 512; when the screwing mechanism 51 completes the screwing action, it rises relative to the rotating body 5 under the guidance of the guide slot 21. The retaining ring 515 is limited by the rotating body 5 and cannot rise at the same time as the screwing mechanism 51. Then the ejection part 513 compresses the spring and is held by the grasping part 511. The gripping portion 511 extends out to eject the bottle cap stuck in the gripping portion 511, which can effectively prevent the bottle cap from being stuck in the gripping portion 511 when the screwing mechanism 51 has not completed the screwing operation, causing the gripping portion 511 to repeatedly grip the bottle cap; after the ejection is completed, the screwing mechanism 51 descends to prepare for the cap gripping operation, at which time the rotating body 5 releases the limit on the retaining ring 515, so that the ejecting portion 513 rises relative to the screwing mechanism 51 under the action of the spring elastic force, and the ejecting portion 513 is retracted into the shaft sleeve 512 by the gripping portion 511, and the screwing mechanism 51 can normally grip the bottle cap.

[0046] Working principle: Start the screwing device. The driving mechanism drives the main shaft 4 to rotate, driving the rotating body 5 and the rotating support 8 to rotate in the first rotation direction. The rotating table 6 of the cap feeding mechanism rotates in the second rotation direction under drive. Taking the screwing mechanism 51 located at the connection of the second horizontal section 213 and the first rising section 214 and its corresponding bottle bracket 81 as an example, at this time, the screwing mechanism 51 completes the screwing operation, and the grasping part 511 does not grasp the cap. Driven by the rotating body 5, the screwing mechanism 51 enters the first rising section 214 and rises relative to the rotating body 5 under the guidance of the guiding chute 21. The retaining ring 515 is limited by the rotating body 5 and cannot rise simultaneously with the screwing mechanism 51. Subsequently, the ejecting part 513 compresses the spring and extends from the grasping part 511, which can effectively prevent the cap from being stuck in the grasping part 511 and causing the grasping part 511 to repeatedly grasp the cap when the screwing mechanism 51 has not completed the cap screwing operation. Then, the screwing mechanism 51 enters the second descending section 215 and prepares for the cap grasping operation. At this time, the rotating body 5 releases the limit on the retaining ring 515, causing the ejecting part 513 to rise relative to the screwing mechanism 51 under the elastic force of the spring and retract into the bushing 512 from the grasping part 511. The screwing mechanism 51 descends so that the grasping part 511 contacts and grasps the cap on the rotating table 6. After grasping, the screwing mechanism 51 enters the first horizontal section 211. When the screwing mechanism 51 moves to the concave working position 2111 of the first horizontal section 211, the grasping part 511 contacts the tabletop of the support platform 7. At this time, the screwing mechanism 51 descends along the concave working position 2111 so that the cap grasped by the grasping part 511 is completely embedded in the rubber bowl under the action of the support platform 7, avoiding the cap from falling due to the too small grasping part when the grasping part 511 grasps the cap. Then, the screwing mechanism 51 enters the first descending section 212, and the grasping part 511 approaches the bottle body on its corresponding bottle bracket 81. When the screwing mechanism 51 moves to the end of the first descending section 212, the cap contacts the bottle mouth of the bottle body. The screwing mechanism 51 is affected by the internal gear ring 31 and the intermediate gear 53, causing the cap to rotate self - clockwise in the first rotation direction. The bottle bracket 81 is affected by the reverse friction block 82, causing the bottle body to rotate counter - clockwise in the second rotation direction. The bottle body and the cap with opposite rotation directions can be rotationally matched, enabling the internal thread of the cap and the external thread of the bottle mouth to quickly align, avoiding damage to the threads when the internal thread of the cap and the external thread of the bottle mouth are not aligned when the screwing mechanism 51 descends.

[0047] In this text, specific examples are used to illustrate the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. The above is only the preferred implementation manner of the present application. It should be noted that due to the limited nature of language expression and objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present application.

Claims

1. A bottle cap screwing device to prevent falling, characterized in that: include: A frame (1), a cam (2) is fixed on the top of the frame (1), a guide slot (21) is provided on the outer periphery of the cam (2), the guide slot (21) comprises a first horizontal section (211), a first descending section (212), a second horizontal section (213), a first ascending section (214) and a second descending section (215) which are sequentially connected end to end, the first horizontal section comprises a concave position (2111), a fixing ring (3) is provided around the cam (2) on the top of the frame (1), an inner gear ring (31) is provided on the inner wall of the fixing ring (3), and a driving mechanism is also provided on the frame (1); A main shaft (4), the main shaft (4) is rotatably connected between the cam (2) and the bottom of the frame (1) in a vertical direction, and can rotate in a first rotation direction under the drive of the driving mechanism; a rotating body (5) is sleeved on the main shaft (4), a plurality of screwing mechanisms (51) are circumferentially penetrated on the rotating body (5), the top end of the screwing mechanism (51) is slidably matched with the guide slide groove (21), and the bottom end thereof is provided with a grasping portion (511) for grasping the bottle cap, a transmission gear (52) is sleeved on the screwing mechanism (51) and is located above the rotating body (5), and a transition gear (53) is meshed between the transmission gear (52) and the inner gear ring (31) on the rotating body (5); The cap feeding mechanism comprises a rotating table (6), wherein the rotating table (6) can rotate along a second rotation direction, the second rotation direction being opposite to the first rotation direction, a plurality of arc grooves are provided on the circumference of the table surface of the rotating table (6), and the arc grooves are used to place bottle caps; the rotating table (6) and the rotating body (5) have an intersecting portion in the vertical direction, so that the screwing mechanism (51) can correspond to the arc grooves in the vertical direction when rotating with the rotating body (5), thereby enabling the grabbing portion (511) to grab the bottle cap from the rotating table (6); a supporting platform (7) is provided on one side of the rotating table (6), and the supporting platform (7) is located in the rotation direction of the grabbing portion (511).

2. The anti-drop bottle cap screwing device according to claim 1, characterized in that: It also comprises a swivel support (8), the swivel support (8) being located below the swivel body (5) and sleeved on the main shaft (4), a plurality of bottle holders (81) being circumferentially arranged on the swivel support (8), the plurality of bottle holders (81) corresponding one to one with the screwing mechanism (51) respectively; a limiting mechanism (9) is sleeved on the main shaft (4) and located between the swivel body (5) and the swivel support (8), for fixing the bottle body and the bottle holder (81) relatively.

3. The anti-drop bottle cap screwing device according to claim 2, characterized in that: A plurality of bottle holders (81) are rotatably connected to the swivel support (8), and a reverse friction block (82) is provided on one side of the bottle holder (81). The reverse friction block (82) and the side of the bottle holder (81) close to each other can be in rolling contact, so that when the bottle holder (81) rotates around the main shaft (4) driven by the swivel support (8) and passes through the reverse friction block (82), it is driven by the reverse friction block (82) to rotate along the second rotation direction; a one-way bearing (83) is also provided between the bottle holder (81) and the swivel support (8), so that the bottle holder (81) can only rotate along the second rotation direction.

4. The anti-drop bottle cap screwing device according to claim 3, characterized in that: The side of the reverse friction block (82) close to the bottle holder (81) is an arc-shaped structure, and the bending direction of the arc-shaped structure is toward the side away from the bottle holder (81).

5. The anti-drop bottle cap screwing device according to claim 1, characterized in that: The screwing mechanism (51) has an ejection portion (513), and the ejection portion (513) is used to eject the bottle cap stuck in the gripping portion (511) after the screwing mechanism (51) completes the screwing action.

6. The anti-drop bottle cap screwing device according to claim 5, characterized in that: The screwing mechanism (51) has a first state and a second state. When in the first state, the ejecting portion (513) extends out of the gripping portion (511), so that the bottle cap stuck in the gripping portion (511) can fall off; when in the second state, the ejecting portion (513) is retracted from the gripping portion (511).

7. The anti-drop bottle cap screwing device according to claim 6, characterized in that: The screwing mechanism (51) comprises a shaft sleeve (512), the shaft sleeve (512) being inserted into the rotating body (5) and being rotatably connected to the rotating body (5), the top end of the shaft sleeve (512) being slidably matched with the guide groove (21), the bottom end of which is provided with the grasping portion (511), the shaft sleeve (512) being provided with the ejection portion (513), the outer periphery of the ejection portion (513) being connected with an elastic member, the free end of the elastic member being fixed to the inner wall of the shaft sleeve (512), the shaft sleeve (512) being provided with a strip hole (514) at a position close to the rotating body (5), the strip hole (514) extending in the vertical direction, a retaining ring (515) being provided below the rotating body (5), the retaining ring (515) being sleeved on the outer periphery of the shaft sleeve (512) and being fixed to the ejection portion (513) through the strip hole (514).

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