Bottle cap screwing equipment with ejection mechanism

Abstract

The bottle cap screwing equipment with the ejection mechanism 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, an inner gear ring is arranged on the inner wall of the fixing ring, and the bottle cap screwing equipment is further provided with a driving mechanism; a main shaft is rotationally connected between the cam and the bottom of the rack, the main shaft can rotate in the first rotating direction and is sleeved with a rotating body, a plurality of screwing mechanisms are arranged on the rotating body in the circumferential direction in a penetrating mode, the top ends of the screwing mechanisms are in sliding fit with the guide sliding grooves, grabbing parts are arranged at the bottom ends of the screwing mechanisms, and the screwing mechanisms are sleeved with transmission gears and can be in transmission connection with the inner gear rings through transition gears; the screwing mechanism is further provided with an ejection part, and the ejection part is used for ejecting out the bottle caps clamped on the grabbing part after the screwing mechanism completes the screwing action. The ejection part is arranged on the screwing mechanism, and when the screwing mechanism grabs unqualified bottle caps and does not complete screwing, the ejection part can eject out the bottle caps clamped by the grabbing part, so that the grabbing part can normally grab new bottle caps, and the screwing qualification rate is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of bottle cap packaging, and in particular to a bottle cap screwing device with an ejection mechanism. Background Art

[0002] After the existing beverage bottles are filled, the bottle caps are usually screwed and sealed onto the bottle body using a capping machine. For example, patent CN202687906U provides a capping machine device. During the screwing process, a robot arm that clamps the bottle cap is located directly above the bottle body, and the two rotate synchronously on the device. The robot arm descends close to the bottle body and rotates around its own axis so that the bottle cap can be screwed tightly onto the bottle body. Due to the presence of unqualified bottle caps, they cannot be screwed onto the bottle mouth, causing the bottle cap to get stuck in the robot arm. When the robot arm grabs a new bottle cap, the stuck bottle cap inside will cause the grabbing to fail or the new bottle cap to be damaged, thereby affecting the screwing pass rate. Utility Model Content

[0003] The purpose of this application is to address the above problems and provide a bottle cap screwing device with an ejection mechanism, comprising:

[0004] A frame, wherein a cam is fixed on the top of the frame, a guide slot is provided on the outer periphery of the cam, a fixing ring is provided around the cam on the top of the frame, an inner gear ring is provided on the inner wall of the fixing ring, and a driving mechanism is also provided on the frame;

[0005] The main shaft rotates in the vertical direction and is connected between the cam and the bottom of the frame, and can rotate 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 passed through the rotating body, the top of the screwing mechanism slides with the guide slot, and the bottom end thereof has a grabbing portion for grabbing the bottle 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 inner gear ring on the rotating body; the screwing mechanism also has an ejection portion, which is used to eject the bottle cap stuck in the grabbing portion after the screwing mechanism completes the screwing action.

[0006] 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 from the gripping part, causing 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.

[0007] According to the technical solution provided in certain embodiments of the present application, the screwing mechanism includes a sleeve, which is passed through the rotating body and is rotatably connected to the rotating body. The top of the sleeve slides in cooperation 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, and the outer periphery of the ejection portion is connected with an elastic member, and 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, and the strip hole extends in a vertical direction. A retaining ring is provided under the rotating body, and the retaining ring is sleeved on the outer periphery of the sleeve and fixed to the ejection portion through the strip hole.

[0008] 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 is sleeved on the main shaft. A plurality of bottle holders are circumferentially provided on the swivel support, and the plurality of bottle holders correspond one-to-one to the screwing mechanisms 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.

[0009] 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, and a reverse friction block is provided on one side of the bottle holder so as to be in rolling contact with the bottle holder. 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, so that when the bottle holder rotates around the main axis and passes through the reverse friction block under the drive of the swivel support, it rotates along the second rotation direction under the action of the reverse friction block, and the second rotation direction is opposite to the first rotation direction.

[0010] According to the technical solution provided in certain embodiments of the present application, it also includes a cap feeding mechanism, which includes a rotating table, which can rotate along the second rotation direction, and a plurality of arc grooves are provided on the circumference of the table surface of the rotating table, and the arc grooves are used to place bottle caps; the rotating table and the rotating body have an intersection in the vertical direction, so that the screwing mechanism can correspond to the arc groove in the vertical direction when rotating with the rotating body, so that the grasping part can grasp the bottle cap from the rotating table.

[0011] According to the technical solutions provided in certain embodiments of the present application, the guide chute has a first horizontal section, a first descending section, a second horizontal section, a first ascending section and a second descending section which are sequentially connected end to end.

[0012] According to the technical solution provided in certain embodiments of the present application, a support platform is provided on one side of the rotating table, and the support platform is located in the rotation direction of the grabbing part; the first horizontal section is provided with a recessed work station, and the recessed work station allows the grabbing part to slide in contact with the surface of the support platform.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a bottle cap screwing device with an ejection mechanism, comprising a frame, a cam fixed on the top of the frame, a guide slide groove provided on the outer periphery of the cam, a fixing ring provided around the cam on the top of the frame, an inner gear ring provided on the inner wall of the fixing ring, and a driving mechanism 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 along a 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 by the rotating body, and the top of the screwing mechanism is connected to the guide slide The groove is slidably fitted, and its bottom end is provided with a gripping part for grabbing the bottle cap. A transmission gear is sleeved on the rotating body on the screwing mechanism, and a transition gear is meshed between the transmission gear and the inner gear ring on the screwing body; the screwing mechanism also has an ejection part, which is used to eject the bottle cap stuck in the gripping part after the screwing mechanism completes the screwing action; by arranging the ejection part on the screwing mechanism, when the screwing mechanism grabs an unqualified bottle cap and fails to complete the screwing, the ejection part can eject the bottle cap stuck in the gripping part, so that the gripping part can normally grab a new bottle cap, thereby ensuring the screwing qualification rate.

[0014] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0017] Figure 2 A schematic structural diagram of a screwing mechanism of a bottle cap screwing device provided in an embodiment of the present application;

[0018] Figure 3A schematic structural diagram of a bottle holder and a reverse friction block of a bottle cap screwing device provided in an embodiment of the present application;

[0019] Figure 4 A schematic structural diagram of a guide chute of a bottle cap screwing device provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of the positional relationship among a rotating body, a rotating table and a supporting platform of a bottle cap screwing device provided in an embodiment of the present application.

[0021] The text annotations in the figure represent:

[0022] 1. Frame; 2. Cam; 3. Fixed ring; 4. Main shaft; 5. Rotating body; 6. Rotating support; 7. Limiting mechanism; 8. Rotating table; 9. Support platform; 21. Guide slide; 31. Inner ring gear; 51. Screwing mechanism; 52. Transmission gear; 53. Transition gear; 61. Bottle holder; 62. Reverse friction block; 63. One-way bearing; 211. First horizontal section; 212. First descending section; 213. Second horizontal section; 214. First ascending section; 215. Second descending section; 511. Grasping part; 512. Bushing; 513. Ejecting part; 514. Strip hole; 515. Retaining ring; 516. Rotating shaft; 2111. Concave work station. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application. Specifically, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

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

[0025] As mentioned in the background technology, in order to solve the problems in the prior art, this embodiment provides a bottle cap screwing device with an ejection mechanism, which is characterized by comprising:

[0026] The frame 1 has a cam 2 fixed on the top thereof, a guide slot 21 being provided on the outer periphery of the cam 2, a fixing ring 3 being provided around the cam 2 on the top of the frame 1, an inner gear ring 31 being provided on the inner wall of the fixing ring 3, and a driving mechanism being further provided on the frame 1;

[0027] The main shaft 4 is connected to the cam 2 and the bottom of the frame 1 in a vertical rotation direction, and can rotate along the first rotation direction under the drive of the driving mechanism; a rotating body 5 is sleeved on the main shaft 4, and a plurality of screwing mechanisms 51 are circumferentially penetrated by the rotating body 5. The top of the screwing mechanism 51 slides with the guide slide 21, and its bottom end has a grabbing portion 511 for grabbing the bottle cap. A transmission gear 52 is sleeved on the screwing mechanism 51 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 screwing mechanism 51 also has an ejection portion 513, which is used to eject the bottle cap stuck in the grabbing portion 511 after the screwing mechanism 51 completes the screwing action.

[0028] like Figure 1 As shown, the first rotation direction is the direction of tightening the bottle cap, and the second rotation direction is the direction of loosening the bottle cap. The frame 1 is a frame structure, including a top plate and a base, and a support column is connected between the top plate and the base; the cam 2 is fixed on the top plate, and a guide groove 21 is provided on the outer periphery of the cam 2. The opening of the guide groove 21 faces the circumference of the cam 2, and thrust ball bearings are respectively provided at the top and bottom of the guide groove 21. A fixing ring 3 is provided around the cam 2. The fixing ring 3 is similar to a cylindrical shell and is fixed on the top plate. An inner gear ring 31 is provided on its inner wall. The driving mechanism is used to drive the entire equipment to operate.

[0029] The main shaft 4 is arranged between the cam 2 and the base in the vertical direction, and can be rotated 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 a cylindrical structure. A plurality of screwing mechanisms 51 are evenly penetrated along the circumferential edge of the rotating body 5. The screwing mechanism 51 is rotatably connected to the rotating body 5. The top end of the screwing mechanism is arranged between two thrust ball bearings in the guide chute 21 and can be raised and lowered under the guidance of the guide chute 21. The bottom end has a rubber bowl, that is, the above-mentioned grasping part 511, which can be grasped by pressing down on the bottle cap and buckling with the bottle cap; screwing A transmission gear 52 is sleeved on the mechanism 51, and a transition gear 53 is also meshed between each transmission gear 52 and the inner ring gear 31 on the rotating body 5. In this embodiment, the transition gear 53 adopts a double gear, which is meshed with the inner ring gear 31 and the transmission gear 52 respectively, and is used to transmit torque and enable the screwing mechanism 51 to rotate around the main shaft 4 along the first rotation direction driven by the rotating body 5, and also to rotate along the first rotation direction so that the bottle cap is tightened on the bottle body; the ejection part 513 is used to eject the bottle cap stuck in the gripping part 511 after the screwing mechanism 51 completes the screwing action.

[0030] When in use, the screwing device is started, the driving mechanism drives the main shaft 4 to rotate, the rotating body 5 rotates along the first rotation direction, and the screwing mechanism 51 rotates around the main shaft 4 under the drive of the rotating body 5, and at the same time rotates along the first rotation direction under the action of the inner ring gear 31 and the transition gear 53, and its top slides along the extension track of the guide slot 21; if the screwing mechanism 51 grabs an unqualified bottle cap, the bottle cap is stuck in the grabbing part 511 after screwing, and when the screwing mechanism 51 rises under the guidance of the guide slot 21, the ejecting part 513 can be extended from the grabbing part 511, ejecting the bottle cap stuck in the grabbing part 511 so that the grabbing part 511 can normally grab a new bottle cap and continue to complete the next screwing action.

[0031] By providing an ejector 513 on the screwing mechanism 51, when the screwing mechanism 51 grabs an unqualified bottle cap and fails to complete the screwing, the ejector 513 can eject the bottle cap stuck in the gripping portion 511, so that the gripping portion 511 can normally grab a new bottle cap, thereby ensuring the screwing qualification rate.

[0032] In a preferred embodiment, the screwing mechanism 51 has a first state and a second state. When in the first state, the ejection portion 513 extends from the gripping portion 511, allowing the bottle cap stuck in the gripping portion 511 to fall off; when in the second state, the ejection portion 513 is retracted from the gripping portion 511.

[0033] like Figure 2As shown, when the screwing mechanism 51 completes the screwing action, the ejection portion 513 extends from the gripping portion, causing the bottle cap stuck in the gripping portion 511 to fall off, that is, the first state mentioned above. After the ejection action is completed, the ejection portion 513 can be retracted by the gripping portion 511, so that the gripping portion 511 can normally grip the bottle cap, that is, the second state mentioned above. The screwing mechanism 51 is driven to rotate under the guidance of the curved groove 21 by the rotating body 5, so that the screwing mechanism 51 can switch between the first state and the second state.

[0034] In a preferred embodiment, the screwing mechanism 51 includes a sleeve 512, which is passed through the rotating body 5 and is rotatably connected to the rotating body 5. The top of the sleeve 512 slides in cooperation with the guide groove 21, and a grabbing portion 511 is provided at its bottom end. A ejection portion 513 is provided inside the sleeve 512, and an elastic member is connected to the outer periphery of the ejection portion 513. The free end of the elastic member is fixed to the inner wall of the sleeve 512. A strip hole 514 is provided on the sleeve 512 near 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, and the retaining ring 515 is sleeved on the outer periphery of the sleeve 512 and fixed to the ejection portion 513 through the strip hole 514.

[0035] like Figure 2As shown, a fixed sleeve is further provided between the shaft sleeve 512 and the rotating body 5. The upper and lower ends of the fixed sleeve have annular protrusions, 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. A thrust ball bearing is provided between the fixed sleeve and the rotating body 5, so that the fixed sleeve can be rotatably connected to 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. The transmission gear 52 and the fixed sleeve are connected to the shaft by the sliding key. The sleeve 512 is connected to the transmission gear 52 and the fixed sleeve. At the same time, 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 groove 21 and can slide with the guide groove 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. The sleeve 512 is close to the rotating body 5 The 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, and 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 groove 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 caught by the grasping part 511 The gripping portion 512 extends outward 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 capping 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 capping operation. At this 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.

[0036] In a preferred embodiment, it also includes a rotary support 6, which is located below the rotary body 5 and is sleeved on the main shaft 4. A plurality of bottle holders 61 are circumferentially provided on the rotary support 6, and the plurality of bottle holders 61 correspond one-to-one to the screwing mechanisms 51 respectively; a limiting mechanism 7 is also sleeved on the main shaft 4 between the rotary body 5 and the rotary support 6, which is used to relatively fix the bottle body and the bottle holder 61.

[0037] like Figure 3As shown, the rotary support 6 is also a cylindrical structure. A plurality of bottle holders 61 are evenly arranged along the circumferential edge of the rotary support 6. The bottle holders 61 correspond one to one with the screwing mechanism 51 in the vertical direction. A rubber pad is provided on the bearing plane of the bottle holder 61 to increase the friction between the bearing plane and the bottom of the bottle body; the limiting mechanism 7 includes a first turntable and a second turntable, which are arranged 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 body, and the second arc-shaped notch matches the contour of the bottle body, which is used to limit the bottle body when screwing the bottle cap.

[0038] In a preferred embodiment, multiple bottle holders 61 are respectively rotatably connected to the swivel support 6, and a reverse friction block 62 is provided on one side of the bottle holder 61 so as to be in rolling contact with the bottle holder. The side of the reverse friction block 62 close to the bottle holder 61 is an arc-shaped structure, and the bending direction of the arc-shaped structure is toward the side away from the bottle holder 61, so that when the bottle holder 61 rotates around the main shaft 4 driven by the swivel support 6 and passes through the reverse friction block 62, it rotates along the second rotation direction under the action of the reverse friction block 62, and the second rotation direction is opposite to the first rotation direction.

[0039] like Figure 3 As shown, the reverse friction block 62 is a double-arc structure, which is provided on one side of the bottle holder 61 and is located on the stroke of the screwing mechanism 51 screwing the bottle cap and the bottle body. The contour of the side close to the bottle holder 61 matches the rotation trajectory of the bottle holder 61 around the main axis. The reverse friction block 62 with an arc structure can better act on the bottle holder 61 during the rotation process, causing it to rotate along the second rotation direction.

[0040] By providing a rotatable bottle holder 61 and providing a reverse friction block 62 on one side of the bottle holder 61 that is in rolling contact with the bottle holder 61, when the bottle holder 61 rotates around the main shaft 4 under the drive of the rotary support 6 and passes through the reverse friction block 62, it rotates along the second rotation direction under the action of the reverse friction block 62. At the same time, when the screwing mechanism 51 rotates around the main shaft 4 under the drive of the rotating body 5, it rotates along the first rotation direction under the action of the inner ring gear 31 and the transition 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 rotatably matched to achieve quick buckle recognition and avoid damage to the thread caused by interaction between the bottle cap and the bottle mouth during the screwing process.

[0041] In a preferred embodiment, a one-way bearing 63 is provided between the bottle holder 61 and the swivel support 6 so that the bottle holder 61 can only rotate along the second rotation direction.

[0042] like Figure 3As shown, the one-way bearing 63 can limit the rotation direction of the bottle holder 61, so that the bottle holder 61 can only rotate in the second rotation direction relative to the rotary support 6, even if the bottle cap is rotated in the direction of tightening at the bottle mouth, to avoid that when the internal thread of the bottle cap and the external thread of the bottle mouth match to a certain extent, the shear force applied to the bottle body by the screwing mechanism 51 through the bottle cap is greater than the friction force between the bottle body and the bottle holder 61, and then the bottle body rotates with the bottle cap so that the bottle cap cannot be completely tightened with the bottle body.

[0043] In a preferred embodiment, it further includes a cap feeding mechanism, which includes a rotating table 8. The rotating table 8 can rotate along the second rotation direction. The rotating table 8 is provided with a plurality of arc grooves in the circumference of the table surface, and the arc grooves are used to place the bottle caps. The rotating table 8 and the rotating body 5 have an intersection in the vertical direction, so that the screwing mechanism 51 can correspond to the arc groove in the vertical direction when the rotating body 5 rotates, so that the grasping portion 511 can grasp the bottle cap from the rotating table 8.

[0044] like Figure 5 As shown, the cap feeding mechanism is mainly used to convey bottle caps for the capping machine to grasp. The rotating table 8 is approximately a cylindrical structure and can rotate at the same speed as the rotating body 5. The inner contour of the arc groove on the rotating table 8 matches the outer contour of the bottle cap and is used to place the bottle cap. The rotating table 8 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 8 and the rotation trajectory of the screwing mechanism 51 have an overlap point, and then when the screwing mechanism 51 rotates to the overlap point position, the bottle cap on the rotating table 8 can be grasped.

[0045] In a preferred embodiment, the guide chute 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.

[0046] like Figure 4 As shown, the guide slot 21 can guide the screwing mechanism 51, and its first horizontal section 211 is the process of the screwing mechanism 51 grabbing the bottle cap on the rotating table 8 and rotating in the horizontal direction, the first descending section 212 is the process of the screwing mechanism 51 descending toward the bottle body while rotating and screwing the bottle cap with the bottle body, the second horizontal section 213 is the process of the screwing mechanism 51 and the bottle holder 61 rotating synchronously until the screwing is completed when the bottle cap is screwed with the bottle body, the first ascending section 214 is the process of the screwing mechanism 51 rising after the screwing action is completed so that the ejection part 513 ejects the bottle cap stuck in the grabbing part 511, and until the screwing mechanism 51 rises to a height higher than the rotating table 8 in the vertical direction, and the second descending section 215 is the process of the screwing mechanism 51 approaching the rotating table 8 and grabbing the bottle cap through the grabbing part 511.

[0047] In a preferred embodiment, a support platform 9 is provided on one side of the rotating table 8, and the support platform 9 is located in the rotation direction of the grabbing part 511; the first horizontal section 211 is provided with a recessed work station 2111, and the recessed work station 2111 allows the grabbing part 511 to slide in contact with the surface of the support platform 9.

[0048] like Figure 4 and Figure 5 As shown, the support platform 9 and the rotating table 8 are at the same height in the vertical direction. When the screwing mechanism 51 rotates to the first horizontal section 211 of the guide slot 21, the grabbing portion 511 of the screwing mechanism 51 grabs the bottle cap and rotates horizontally. When it rotates to the recessed position 2111, the grabbing portion 511 contacts the table surface of the support platform 9. The screwing mechanism 51 descends along the recessed position 2111 so that the bottle cap of the grabbing portion 511 is completely embedded in the rubber bowl under the action of the support platform 9, thereby effectively avoiding the problem of the bottle cap falling off due to the grabbing portion 511 grabbing the bottle cap being too small.

[0049] 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 6 to rotate along the first rotation direction, and the rotating platform 8 of the cap feeding mechanism is driven to rotate along the second rotation direction; take the screwing mechanism 51 and the corresponding bottle holder 61 located at the connection between the second horizontal section 213 and the first rising section 214 as an example, at this time, the screwing mechanism 51 completes the screwing operation, the grabbing part 511 does not grab the bottle cap, the screwing mechanism 51 is driven by the rotating body 5 to enter the first rising section 214, and rises relative to the rotating body 5 under the guidance of the guide groove 21, and the retaining ring 51 The rotating body 5 is limited in position and cannot rise simultaneously with the screwing mechanism 51, so that the ejection portion 513 compresses the spring and extends from 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 capping operation, causing the gripping portion 511 to repeatedly grip the bottle cap; then the screwing mechanism 51 enters the second descending section 215, ready to perform the capping operation, at which time the rotating body 5 releases the limit on the retaining ring 515, causing the ejection portion 513 to rise relative to the screwing mechanism 51 under the action of the spring elastic force, and retract into the shaft sleeve 512 by the gripping portion 511, and the screwing mechanism 51 descends. The gripping portion 511 contacts the bottle cap on the rotating table 8 and grips it. After gripping, the screwing mechanism 51 enters the first horizontal section 211. When the screwing mechanism 51 moves to the concave position 2111 of the first horizontal section 211, the gripping portion 511 contacts the table surface of the support platform 9. The screwing mechanism 51 descends along the concave position 2111 at this time so that the bottle cap of the gripping portion 511 is completely embedded in the rubber bowl by the support platform 9, thereby preventing the gripping portion 511 from gripping the bottle cap too small and causing the bottle cap to fall off. Then the screwing mechanism 51 enters the first descending section 212, and the gripping portion 51 1 approaches the bottle body on the corresponding bottle holder 61. When the screwing mechanism 51 moves to the end of the first descending section 212, the bottle cap contacts the bottle mouth of the bottle body. The screwing mechanism 51 is acted upon by the inner gear ring 31 and the transition gear 53 to make the bottle cap rotate along the first rotation direction. The bottle holder 61 is acted upon by the reverse friction block 62 to make the bottle body rotate along the second rotation direction. The bottle body and the bottle cap rotating in opposite directions can be rotatably matched, so that the internal thread of the bottle cap and the external thread of the bottle mouth are quickly locked, thereby preventing the internal thread of the bottle cap and the external thread of the bottle mouth from being misaligned with each other when the screwing mechanism 51 descends, thereby preventing damage to the threads.

[0050] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A bottle cap screwing device with an ejection mechanism, characterized in that: include: A frame (1), wherein 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), a fixing ring (3) is provided on the top of the frame (1) surrounding the cam (2), 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) is connected between the cam (2) and the bottom of the frame (1) in a vertical rotation direction and can rotate along a first rotation direction under the drive of the driving mechanism; a rotating body (5) is sleeved on the main shaft (4), and a plurality of screwing mechanisms (51) are circumferentially penetrated on the rotating body (5), the top of the screwing mechanism (51) is slidably matched with the guide slide groove (21), and the bottom of the screwing mechanism (51) has a gripping portion (511) for gripping a bottle cap, a transmission gear (52) is sleeved on the screwing mechanism (51) 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 screwing mechanism (51) also 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.

2. The bottle cap screwing device with an ejection mechanism according to claim 1, characterized in that: The screwing mechanism (51) has a first state and a second state. When in the first state, the ejection portion (513) extends from the gripping portion (511), causing the bottle cap stuck in the gripping portion (511) to fall off. When in the second state, the ejection portion (513) is retracted from the gripping portion (511).

3. The bottle cap screwing device with an ejection mechanism according to claim 2, characterized in that: The screwing mechanism (51) includes a sleeve (512), the sleeve (512) is passed through the rotating body (5) and is rotatably connected to the rotating body (5), the top end of the sleeve (512) is slidably matched with the guide groove (21), and the bottom end thereof is provided with the grabbing portion (511), the sleeve (512) is provided with the ejection portion (513), the outer periphery of the ejection portion (513) is connected with an elastic member, the free end of the elastic member is fixed to the inner wall of the sleeve (512), a strip hole (514) is opened on the sleeve (512) near the rotating body (5), the strip hole (514) extends in the vertical direction, and a retaining ring (515) is provided below the rotating body (5), the retaining ring (515) is sleeved on the outer periphery of the sleeve (512) and is fixed to the ejection portion (513) through the strip hole (514).

4. The bottle cap screwing device with an ejection mechanism according to claim 1, characterized in that: The rotary support (6) is located below the rotary body (5) and is sleeved on the main shaft (4). A plurality of bottle holders (61) are provided circumferentially on the rotary support (6). The plurality of bottle holders (61) correspond to the screwing mechanisms (51) one by one. A limiting mechanism (7) is sleeved on the main shaft (4) between the rotary body (5) and the rotary support (6) for fixing the bottle body and the bottle holder (61) relative to each other.

5. The bottle cap screwing device with an ejection mechanism according to claim 4, characterized in that: The plurality of bottle holders (61) are respectively connected to the rotary support (6) in rotation. A reverse friction block (62) is provided on one side of the bottle holder (61) so as to be in rolling contact with the bottle holder. The reverse friction block (62) is formed into an arc structure on a side close to the bottle holder (61), and the bending direction of the arc structure is directed toward a side away from the bottle holder (61). When the bottle holder (61) rotates around the main shaft (4) and passes through the reverse friction block (62) under the drive of the rotary support (6), the bottle holder (61) is driven by the reverse friction block (62) to rotate along a second rotation direction, and the second rotation direction is opposite to the first rotation direction.

6. The bottle cap screwing device with an ejection mechanism according to claim 5, characterized in that: The invention also includes a cap feeding mechanism, which includes a rotating table (8), the rotating table (8) can rotate along the second rotation direction, and a plurality of arc grooves are provided on the circumference of the table surface of the rotating table (8), and the arc grooves are used to place bottle caps; the rotating table (8) 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 (8).

7. The bottle cap screwing device with an ejection mechanism according to claim 6, characterized in that: The guide chute (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.

8. The bottle cap screwing device with an ejection mechanism according to claim 7, characterized in that: A support platform (9) is provided on one side of the rotating table (8), and the support platform (9) is located in the rotation direction of the grabbing portion (511); the first horizontal section (211) is provided with a recessed position (2111), and the recessed position (2111) enables the grabbing portion (511) to be in sliding contact with the table surface of the support platform (9).

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