A capping device

Abstract

The present invention discloses a screw cap device, which solves the technical problems of narrow application range and poor versatility of screw cap devices in the prior art. The screw cap device of the present invention comprises a screw cap arm and a screw cap head mounted at the lower end of the screw cap arm, wherein the screw cap arm drives the screw cap head to rise and fall synchronously and rotate synchronously, wherein the screw cap head comprises a push cap member and a screw cap sleeve slidably sleeved on the outer side of the push cap member, wherein the screw cap sleeve is provided with a vertically extending slide groove, wherein the screw cap device also comprises a push cap plate and a limit sleeve slidably sleeved on the outer side of the screw cap sleeve, wherein the push cap plate is provided with a through hole that slidably cooperates with the screw cap head, and the limit sleeve comprises a limit section located below the push cap plate, wherein the outer diameter of the limit section is larger than the aperture of the through hole, and a pin rod passes through the push cap member, the slide groove and the limit section.

Description

Technical field

[0001] The present invention relates to the technical field of screw capping, and in particular to a screw capping device. [Background Technology]

[0002] In the liquid packaging industry, a screw-on capping device is used to tighten bottle caps onto bottles filled with product. The screw-on capping device typically includes a screw-on capping arm and a screw-on capping head mounted at the lower end of the screw-on capping arm. When the screw-on capping arm drives the screw-on capping head down to a low position, the screw-on capping head grasps the bottle cap. When the screw-on capping arm drives the screw-on capping head up to a first height, the screw-on capping head places the bottle cap on the bottle and rotates synchronously with the screw-on capping arm to tighten the cap onto the bottle. Existing screw-on capping heads have a closed, circumferential structure. For heavier bottles, when the screw-on capping arm drives the screw-on capping head further up to a second height, the bottle's gravity overcomes the friction between the cap and the screw-on capping head, allowing the screw-on capping head to separate and remove the cap. However, for lighter bottles, the bottle's weight cannot overcome the friction between the cap and the screw-on capping head, causing the bottle to be lifted and unable to be removed. Consequently, existing screw-on capping devices can only be used with heavier bottles and are not suitable for lighter bottles. This results in a limited range of applicability and poor versatility. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a screw capping device which has a wide range of applications and strong versatility.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A screw cap device comprises a screw cap arm and a screw cap head mounted at the lower end of the screw cap arm, the screw cap arm drives the screw cap head to rise and fall and rotate synchronously, the screw cap head comprises a push cap member and a screw cap sleeve slidably sleeved on the outside of the push cap member, the screw cap sleeve is provided with a vertically extending slide groove, the screw cap device also comprises a push cap plate and a limit sleeve slidably sleeved on the outside of the screw cap sleeve, the push cap plate is provided with a through hole that slides with the screw cap head, the limit sleeve comprises a limit section located below the push cap plate, the outer diameter of the limit section is larger than the aperture of the through hole, and a pin rod passes through the push cap member, the slide groove and the limit section.

[0006] In the above-mentioned screw cap device, the cap pushing member is a hollow cylindrical structure.

[0007] In the above-mentioned screw capping device, the limiting sleeve further includes a guide section connected to the top of the limiting section, and the outer diameter of the guide section is smaller than the aperture of the through hole.

[0008] In the above-mentioned screw cap device, the screw cap sleeve is provided with a plurality of mounting holes at circumferential intervals in the portion below the push cap member, and the screw cap head further comprises an elastic ring and a steel ball arranged in the mounting holes, and the elastic ring is sleeved on the outside of the screw cap head to elastically squeeze the steel ball radially inward.

[0009] In the above-mentioned screw capping device, the screw capping device also includes a rotary drive, a coaxially arranged first turntable and a cam, a plurality of screw capping arms are circumferentially spaced apart and mounted on the first turntable, a lifting slot is provided on the outer circumference of the cam, the upper end of the screw capping arm is rotatably slidably engaged with the lifting slot, a transmission sleeve is mounted on the outer side of the screw capping arm, and the rotary drive drives the transmission sleeve to rotate.

[0010] In the above-mentioned rotary cover device, the cover pushing plate is a cover pushing disk coaxially arranged with the first rotary disk, and the outer circumference of the cover pushing disk is provided with a plurality of circumferentially spaced notches, and the notches form the through holes.

[0011] In the above-mentioned screw cap device, the top rotating sleeve of the screw cap arm is provided with an adapter sleeve and a connecting component connected to the adapter sleeve, the connecting component is rotatably and slidingly matched with the lifting slide, and the first turntable is provided with a plurality of circumferentially spaced mounting holes and a guide sleeve fixed at the mounting holes, the guide sleeve is sleeved on the outside of the adapter sleeve and slidingly matched with the adapter sleeve.

[0012] In the above-mentioned cap screwing device, the outer peripheral side of the guide sleeve is provided with a shoulder surface and a clamping groove below the shoulder surface, a clamping spring is provided in the clamping groove, and the first turntable is clamped and fixed between the shoulder surface and the clamping spring.

[0013] In the above-mentioned screw cap device, a positioning groove is provided on the upper surface of the first turntable around the mounting hole, and the guide sleeve includes a large diameter section cooperating with the positioning groove and a small diameter section provided at the bottom of the large diameter section. The bottom surface of the large diameter section forms the shaft shoulder surface, the small diameter section passes through the mounting hole, and the slot is provided on the small diameter section.

[0014] Beneficial effects of the present invention:

[0015] As the capping sleeve continues to move upward, the length of the lower end of the cap pushing member extending into the cap receiving cavity increases, so as to push the bottle cap out of the cap receiving cavity, thereby completing the capping action. It can be seen from this that the technical solution of the present invention is to complete the cap removal work by overcoming the friction between the bottle cap and the screw cap sleeve through the thrust of the cap pushing member. Regardless of whether the bottle is heavy or light, the thrust of the cap pushing member will not be affected. Therefore, the screw cap device of the present invention can smoothly remove the caps from all bottles, thereby increasing the scope of application of the screw cap device and improving the versatility of the screw cap device.

[0016] The cover-pushing member is a hollow cylindrical structure. Such a design can reduce the material cost and weight of the cover-pushing member, so that when the bottle cap is grabbed, the cover-pushing member and the limiting sleeve can be lifted a certain distance by the bottle cap.

[0017] The limiting sleeve also includes a guide segment connected to the top of the limiting section, with an outer diameter of the guide segment being smaller than the diameter of the through hole. This design allows the guiding segment to cooperate with the through hole to radially limit the limiting sleeve, thereby keeping the screw-on cap sleeve upright. This prevents the screw-on cap sleeve from moving horizontally and tilting relative to the bottle cap during removal, preventing the bottle cap from becoming stuck in the screw-on cap sleeve and preventing removal.

[0018] The portion of the capping sleeve located below the cap-pushing member is circumferentially provided with multiple mounting holes. The capping head also includes an elastic ring and a steel ball positioned within the mounting holes. The elastic ring fits over the outer surface of the capping sleeve to elastically compress the steel ball radially inward. This design effectively reduces friction between the cap and the capping sleeve by elastically compressing the steel ball against the outer circumference of the bottle cap, thereby facilitating smoother cap removal.

[0019] The capping device also includes a rotary driver, a coaxially arranged first turntable, and a cam. Multiple capping arms are circumferentially spaced apart on the first turntable. A lifting chute is provided on the outer circumference of the cam. The upper ends of the capping arms rotatably and slidingly engage with the lifting chute. A drive sleeve is sleeved on the outer side of the capping arm, and the rotary driver drives the drive sleeve to rotate. With this design, when the first turntable drives the capping arm to rotate, the lifting chute drives the capping arm, which in turn drives the capping head to rise and fall synchronously. Furthermore, the rotary driver can also drive the drive sleeve to rotate, causing the drive sleeve to drive the capping arm to rotate synchronously with the capping head, thereby tightening the cap on the bottle.

[0020] The push plate is coaxially mounted with the first rotating disk. Multiple circumferentially spaced notches are provided on its outer circumference, forming through-holes. This design simplifies the processing of the push plate. During assembly, the capping head simply snaps into the notches, simplifying assembly of the capping device.

[0021] The top rotating sleeve of the capping arm is fitted with an adapter sleeve and a connecting assembly connected to the adapter sleeve. The connecting assembly rotatably and slidingly engages with the lifting chute. The first turntable is provided with a plurality of circumferentially spaced mounting holes and a guide sleeve fixed to the mounting holes. The guide sleeve fits over the adapter sleeve and slidably engages with the adapter sleeve. This design allows the connecting assembly to rotate along the lifting chute, driving the capping arm up and down through the adapter sleeve, while also driving the drive sleeve to move synchronously. When the rotary driver drives the drive sleeve to rotate the capping arm, the adapter sleeve does not rotate. This ensures stable engagement between the connecting assembly and the lifting chute, while also simplifying the structure.

[0022] The outer circumference of the guide sleeve is provided with a shoulder surface and a retaining groove below the shoulder surface. A retaining spring is installed in the retaining groove, and the first turntable is clamped and fixed between the shoulder surface and the retaining spring. Compared with screw connection between the guide sleeve and the first turntable, this design makes the guide sleeve assembly simpler and more convenient.

[0023] The top surface of the first turntable features a positioning slot surrounding the mounting hole. The guide sleeve consists of a large-diameter section that mates with the positioning slot and a small-diameter section located at the bottom of the large-diameter section. The bottom surface of the large-diameter section forms a shoulder surface, while the small-diameter section extends through the mounting hole and is provided with a retaining slot. This design allows the guide sleeve to be positioned horizontally through the positioning slot, preventing horizontal movement and improving installation reliability.

[0024] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1This is a schematic diagram of the structure of the cooperation between the capping head and the capping push plate in the first embodiment of the present invention;

[0027] Figure 2 for Figure 1 sectional view of

[0028] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0029] Figure 4 Schematic diagram of a portion of the structure of the capping device in the first embodiment of the present invention;

[0030] Figure 5 for Figure 4 sectional view of

[0031] Figure 6 for Figure 5 A partial enlarged schematic diagram of B in the middle;

[0032] Reference numerals:

[0033] 100, capping arm; 110, drive shaft sleeve; 120, limiting nut; 130, spacer sleeve; 140, bearing seat; 150, support sleeve; 160, limiting ring; 200, capping head; 210, capping member; 220, capping sleeve; 221, slide groove; 222, mounting hole; 223, groove; 224, capping cavity; 300, capping plate; 310, through hole; 400, limiting sleeve; 410, limiting section; 420, pin; 430, guide Toward section; 500, first turntable; 510, mounting hole; 511, positioning groove; 520, guide sleeve; 521, shoulder surface; 522, retaining groove; 530, retaining spring; 600, cam; 610, lifting slide; 700, adapter sleeve; 710, bearing; 711, upper bearing; 712, lower bearing; 800, connecting assembly; 810, connecting head; 820, connecting plate; 821, first roller; 822, second roller; 900, second turntable. [Specific implementation method]

[0034] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0035] Example 1

[0036] Reference Figures 1 to 6As shown, the capping device in this embodiment includes a capping arm 100 and a capping head 200 installed at the lower end of the capping arm. The capping arm 100 drives the capping head 200 to rise and fall synchronously and rotate synchronously. The capping head 200 includes a cap pushing member 210 and a capping sleeve 220 that is slidably mounted on the outside of the cap pushing member 210. The wall of the capping sleeve 220 is evenly spaced around the circumference and provided with an even number of vertically extending sliding grooves 221. The capping device also includes a cap pushing plate 300 and a capping sleeve 220 that is slidably mounted on the outside of the capping sleeve 220. The limiting sleeve 400 on the side, the push cover plate 300 is provided with a through hole 310, the screw cap head 200 is set through the through hole 310 and vertically slides with the through hole 310, and the limiting sleeve 400 includes a limiting section 410 located below the push cover plate 300, and the outer diameter of the limiting section 410 is larger than the aperture of the through hole 310. In this way, the limiting section 410 can be limited to the bottom of the push cover plate 300, and the pin rod 420 radially penetrates the push cover member 210, the slide groove 221 and the limiting section 410.

[0037] Before the screw capping device in this embodiment grabs the bottle cap, the limiting sleeve 400 drives the pin rod 420 to move down to the bottom end of the slide groove 221 under the action of gravity. At this time, the cap pushing member 210 extends into the cap receiving cavity 224 of the screw capping sleeve 220 for accommodating the bottle cap. After the screw capping sleeve 220 grabs the bottle cap, the bottle cap will push the cap pushing member 210 upward, so that the cap pushing member 210 drives the pin rod 420 and the limiting sleeve 400 to move up a distance, that is, there is a certain distance between the pin rod 420 and the bottom end of the slide groove 221. When the bottle cap is tightened to the bottle and the cap is withdrawn, the screw capping arm 100 drives the screw capping head 200 to rise. The height position of the push cover plate 300 remains unchanged. Therefore, when the limiting section 410 of the limiting sleeve 400 abuts against the bottom surface of the push cover plate 300, the limiting sleeve 400 stops moving upward, that is, the push cover member 210 stops moving upward, while the screw cap arm 100 still drives the screw cap sleeve 220 to move upward. In this way, the lower end of the push cover member 210 extends into the cap cavity 224 and abuts against the top surface of the bottle cap. As the screw cap sleeve 220 continues to move upward, the length of the lower end of the push cover member 210 extending into the cap cavity 224 increases, so as to push the bottle cap out of the cap cavity 224, thereby completing the cap removal action. It can be seen that the technical solution of this embodiment is to complete the cap removal work by overcoming the friction between the bottle cap and the screw cap sleeve 220 through the thrust of the cap pushing member 210. Regardless of whether the bottle is heavy or light, the thrust of the cap pushing member 210 will not be affected. Therefore, the screw capping device of this embodiment can smoothly remove the caps from all bottles, thereby increasing the scope of application of the screw capping device and improving the versatility of the screw capping device.

[0038] Preferably, the cap-pushing member 210 is a hollow cylindrical structure. This design can reduce the material cost and weight of the cap-pushing member 210. When grabbing the bottle cap, the cap-pushing member 210 and the limiting sleeve 400 can be smoothly lifted a certain distance by the bottle cap. When the bottle cap is later withdrawn, after the limiting section 410 abuts against the cap-pushing plate 300, the cap-screwing sleeve 220 can continue to move upward relative to the cap-pushing member 210.

[0039] Furthermore, the limiting sleeve 400 in this embodiment further includes a guide section 430 connected to the top of the limiting section 410. The outer diameter of the guide section 430 is smaller than the diameter of the through hole 310. This design allows the guiding section 430 to cooperate with the through hole 310 to radially limit the limiting sleeve 400, thereby maintaining the screw-on cap sleeve 220 in a vertical position. This prevents the screw-on cap sleeve 220 from moving horizontally and tilting relative to the bottle cap during removal, which could cause the bottle cap to become stuck in the screw-on cap sleeve 220 and prevent it from being removed.

[0040] In order to make the cap removal smoother, the capping sleeve 220 in this embodiment is provided with a plurality of mounting holes 222 at intervals along the circumference of the portion below the cap pushing member 210. The outer side of the capping sleeve is also provided with an annular groove. The mounting holes 222 are provided in the wall of the groove and communicate with the cap receiving cavity 224. The capping head 200 also includes an elastic ring (not shown) and a steel ball (not shown) provided in the mounting hole 222. The diameter of the steel ball is larger than the diameter of the mounting hole 222. The elastic ring is embedded in the groove 223 and elastically squeezes the steel ball radially inward, thereby fixing the steel ball. After the capping sleeve 220 grabs the bottle cap, the bottle cap and the steel ball elastically counteract each other, thereby effectively reducing the friction between the bottle cap and the capping sleeve 220, making the cap removal smoother.

[0041] In addition, in order to realize synchronous lifting and rotation of the capping arm 100 and the capping head 200, the capping device in this embodiment further includes a rotary driver (not shown in the figure), a coaxially arranged first turntable 500 and a cam 600. The cam 600 is fixed, and a lifting slide 610 is provided on the outer peripheral side of the cam 600. A plurality of capping arms 100 are circumferentially spaced and mounted on the first turntable 500. The upper ends of the capping arms 100 are rotatably slidably engaged with the lifting slide 610. As a result, when the first turntable 500 drives the capping arm 100 to rotate synchronously, the lifting slide 610 can drive the capping arm 100 to drive the capping head 200 to lift synchronously. In addition, a transmission sleeve 110 is also provided on the outer side of the capping arm 100. The transmission sleeve 110 is connected to the capping arm 100 by a keyway. The rotary driver drives the transmission sleeve 110 to rotate, and the transmission sleeve 110 drives the capping arm 100 to drive the capping head 200 to rotate synchronously to tighten the bottle cap.

[0042] It is understandable that in other embodiments of the present invention, the transmission sleeve has a non-circular hole, the rotary cover arm has a non-circular segment with a non-circular cross-section, and the non-circular segment cooperates with the non-circular hole. Such a design can also achieve synchronous rotation of the transmission sleeve and the rotary cover arm.

[0043] Preferably, the top rotating sleeve of the rotary cover arm 100 is provided with an adapter sleeve 700 and a connecting assembly 800 connected to the adapter sleeve 700, a bearing 710 is provided between the adapter sleeve 700 and the rotary cover arm 100, and the bearing 710 includes an upper bearing 711 and a lower bearing 712, and the inner wall of the adapter sleeve 700 is provided with an upper shoulder surface and a lower shoulder surface, and the outer side of the rotary cover arm 100 is provided with a limiting nut 120, a spacer sleeve 130 and a bearing seat 140 in sequence from top to bottom, wherein the limiting nut 120 is threadedly connected to the rotary cover arm 100, the top surface of the upper bearing 711 is against the upper shoulder surface and the bottom surface of the limiting nut 120, and the spacer sleeve 130 is clamped and fixed between the upper bearing 711 and the lower bearing 712, so that the bottom of the upper bearing 711 The upper and lower bearings 711 and 712 are fixed between the bearing seat 140 and the spacer sleeve 130. The upper and lower bearings 711 and 712 are provided to allow the rotary cover arm 100 to rotate relative to the adapter sleeve 700 while ensuring the coaxiality of the rotary cover arm 100 and the adapter sleeve 700. At the same time, this design also reduces the difficulty of assembling the upper and lower bearings 711 and 712. Finally, the bearing 710 can effectively reduce the friction force on the rotary cover arm 100 when it rotates relative to the adapter sleeve 700, so that the rotary cover arm 100 can rotate more smoothly and the rotation accuracy of the rotary cover arm 100 can be improved.

[0044] The connection assembly 800 includes a connector 810 and a connecting plate 820 disposed on top of the connector 810. The connecting plate 820 extends vertically and is integrally formed with the connector 810. The connector 810 is inserted into the top of the adapter sleeve 700 to seal the upper end of the adapter sleeve 700 and prevent dust from entering the adapter sleeve 700. The wall of the adapter sleeve 700 is symmetrically provided with two radially extending through-holes. A pin passes through the two through-holes and the portion where the connector 810 is inserted into the adapter sleeve 700, thereby achieving the connection between the connector 810 and the adapter sleeve 700. The connecting plate 820 is vertically spaced apart with a first roller 821 and a second roller 822, and the second roller 822 is located below the first roller 821, wherein the first roller 821 is arranged in the lifting slide 610 and slides with the lifting slide 610, and the thickness of the part of the lifting slide 610 between the first roller 821 and the second roller 822 remains unchanged, so that the second roller 822 always contacts the bottom surface of the cam 600. Such a design can not only increase the cooperation stability of the connecting component 800 and the lifting slide 610, but also reduce the friction between the connecting component 800 and the cam 600, so that the sliding of the connecting component 800 relative to the lifting slide 610 is smoother.

[0045] In addition, in this embodiment, a support sleeve 150 is also provided on the outside of the rotary cover arm 100. The upper end of the support sleeve 150 is abutted against the bottom surface of the lower bearing 712, and the lower end of the support sleeve 150 is abutted against the first shoulder surface on the rotary cover arm 100. A sealing ring is clamped between the support sleeve 150 and the bearing seat 140 to achieve a dust-proof effect and prevent dust from entering the adapter sleeve 700. The outside of the rotary cover arm 100 is also provided with a second shoulder surface located below the first shoulder surface. The limiting ring 160 is sleeved on the outside of the rotary cover arm 100 and supported on the second shoulder surface of the rotary cover arm 100. The transmission sleeve 110 is axially limited between the limiting ring 160 and the lower end of the support sleeve 150. In this way, the axial limitation of the transmission sleeve 110 can be achieved, and the structure is simple and easy to assemble.

[0046] In addition, the first turntable 500 in this embodiment is provided with a plurality of mounting holes 510 spaced circumferentially, and a guide sleeve 520 fixed at the mounting hole 510. The outer peripheral side of the guide sleeve 520 is provided with a shoulder surface 521 and a clamping groove 522 located below the shoulder surface 521. A retaining spring 530 is provided in the clamping groove 522. The first turntable 500 is clamped and fixed between the shoulder surface 521 and the retaining spring 530, thereby realizing the installation and fixation of the guide sleeve 520 on the first turntable 500, and the assembly is relatively simple and convenient; and the adapter sleeve 700 is arranged through the guide sleeve 520 and slidably cooperates with the guide sleeve 520, thereby realizing the vertical sliding of the adapter sleeve 700 relative to the first turntable 500.

[0047] Preferably, the upper surface of the first turntable 500 is further provided with a positioning groove 511 arranged around the mounting hole 510, and the guide sleeve 520 includes a large diameter section cooperating with the positioning groove 511 and a small diameter section arranged at the bottom of the large diameter section. The bottom surface of the large diameter section forms a shaft shoulder surface 521, and the small diameter section is arranged through the mounting hole 510. The card slot 522 is arranged on the small diameter section. With this design, the guide sleeve 520 can be horizontally positioned through the positioning groove 511 to prevent the guide sleeve 520 from moving horizontally, thereby improving the installation reliability of the guide sleeve 520.

[0048] Secondly, the push cover plate 300 in this embodiment is a push cover plate coaxially arranged with the first turntable 500. The push cover plate 300 is located below the first turntable 500 and rotates synchronously with the first turntable 500. The outer periphery of the push cover plate is provided with a plurality of circumferentially spaced notches, and the notches form through holes 310. Such a design can reduce the processing difficulty of the push cover plate 300. At the same time, during assembly, the screw capping head 200 can be inserted into the notches, thereby reducing the assembly difficulty of the screw capping device.

[0049] Furthermore, the rotary driver in this embodiment includes a gear plate coaxially arranged with the first rotary disk 500 and a motor that drives the gear plate. The outer periphery of the gear plate is provided with teeth that mesh with the transmission sleeves 110. This design allows a single gear plate to simultaneously drive the rotation of all transmission sleeves 110. Compared to using a single rotary driver to drive a single transmission sleeve, this design reduces the number of parts and reduces manufacturing costs.

[0050] It can be understood that in other embodiments of the present invention, in order to improve controllability, the number of rotary drives is the same as the number of rotary mechanisms. In this case, all rotary drives are installed on a rotating frame that is coaxially arranged with the first turntable and rotates synchronously, and one rotary drive drives one transmission sleeve to rotate.

[0051] Finally, since the screw-on cap arm 100 is relatively long, in order to prevent the screw-on cap arm 100 from tilting, the screw-on cap device in this embodiment also includes a second turntable 900 coaxially arranged with the first turntable 500. The second turntable 900 is located between the first turntable 500 and the cover-pushing plate 300. The second turntable 900 rotates synchronously with the first turntable 500. A guide hole is provided on the second turntable 900 for the screw-on cap arm 100 to pass through. The screw-on cap arm 100 can slide vertically and rotate circumferentially relative to the guide hole. With this design, the lower end of the screw-on cap arm 100 can be positioned by the second turntable 900 to prevent the screw-on cap arm 100 from tilting, thereby ensuring that the screw-on cap arm 100 is in a vertical state to facilitate grabbing the cap.

[0052] When the capping device of this embodiment is working, when the capping arm 100 moves to the low position, the capping head 200 grabs the bottle cap. When the capping arm 100 rises to the first height, the capping head 200 puts the bottle cap on the bottle filled with product. The rotary driver drives the transmission sleeve 110 to rotate, thereby driving the capping arm 100 to rotate through the transmission sleeve 110 and then driving the capping head 200 to rotate, so as to tighten the bottle cap on the bottle. When the capping arm 100 drives the capping head 200 to continue to rise to the second height, the limiting sleeve 40 0 and the bottom surface of the cover-pushing plate 300. The limit sleeve 400 stops moving upward, that is, the cover-pushing member 210 stops moving upward, while the cap-screwing arm 100 continues to drive the cap-screwing sleeve 220 upward. In this way, the lower end of the cap-screwing member 210 extends into the cap-receiving cavity 224 and contacts the top surface of the bottle cap. As the cap-screwing sleeve 220 continues to move upward, the length of the lower end of the cap-screwing member 210 extending into the cap-receiving cavity 224 increases, thereby pushing the bottle cap out of the cap-receiving cavity 224, thereby completing the cap-removing action. It should be noted that after the cap-removing action is completed, the limit sleeve 400, under the action of its own weight, drives the pin 420 and the cover-pushing member 210 downward until the pin 420 engages with the bottom end of the slide groove 221.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A capping device comprising a capping arm and a capping head mounted at the lower end of the capping arm, wherein the capping arm drives the capping head to rise and fall synchronously and rotate synchronously, wherein: The cam is adapted to engage the outer cover of the bottle cap and to engage the outer cover of the bottle cap when the bottle cap is engaged. The cam is provided with a lifting slot, and the upper end of the rotary cover arm is rotatably and slidably engaged with the lifting slot.

2. A screw capping device according to claim 1, characterized in that: The part of the screw cap sleeve below the push cap member is circumferentially provided with a plurality of mounting through holes. The screw cap head further comprises an elastic ring and a steel ball arranged in the mounting through holes. The elastic ring is sleeved on the outside of the screw cap sleeve to elastically squeeze the steel ball radially inward.

3. The capping device according to claim 1, wherein: The outer peripheral side of the guide sleeve is provided with a shaft shoulder surface and a clamping groove located below the shaft shoulder surface, a clamping spring is provided in the clamping groove, and the first turntable is clamped and fixed between the shaft shoulder surface and the clamping spring.

4. A screw capping device according to claim 3, characterized in that: The upper surface of the first turntable is provided with a positioning groove arranged around the mounting hole, and the guide sleeve includes a large diameter section cooperating with the positioning groove and a small diameter section arranged at the bottom of the large diameter section, the bottom surface of the large diameter section forms the shaft shoulder surface, the small diameter section is arranged through the mounting hole, and the slot is arranged on the small diameter section.

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