A capping device with a simple structure

Abstract

The present invention discloses a capping device with a simple structure, which includes a first turntable, a rotary drive, a capping mechanism circumferentially and spacedly installed on the first turntable, and a cam coaxially arranged with the first turntable. A lifting chute is provided on the outer peripheral side of the cam. The capping mechanism includes a capping arm, a transfer sleeve, a connecting component, a capping head and a transmission shaft sleeve. The transfer sleeve is rotatably installed at the top of the capping arm and vertically slides through the first turntable. The connecting component is connected to the transfer sleeve, and the connecting component is rotatably and slidably matched with the lifting chute so that the capping mechanism makes a lifting movement relative to the first turntable. The transmission shaft sleeve is sleeved outside the capping arm and rotates synchronously with the capping arm. The rotary drive drives the transmission shaft sleeve to rotate, and the capping head is installed at the bottom of the capping arm. The capping arm drives the capping head to rotate synchronously to tighten the bottle cap. The capping device of the present invention can drive the rotary drive to drive the capping mechanism to tighten the bottle cap without the rotary drive lifting with the capping mechanism, and the overall structure of the machine is relatively simple.

Description

Technical Field

[0001] The present invention relates to the technical field of capping, and particularly to a capping device with a simple structure.

Background Art

[0002] In the liquid packaging industry, a capping device is used to tighten the bottle cap onto a bottle filled with a product. The capping device generally includes a capping mechanism, a lifting mechanism, and a rotary driver. Among them, the capping mechanism is used to grasp the bottle cap; the rotary driver is used to drive the capping mechanism to rotate so as to tighten the bottle cap onto the bottle. Since the height of the capping mechanism is different when grasping the bottle cap and when tightening the bottle cap, therefore, the lifting mechanism is required to drive the capping mechanism to lift and lower, so as to be able to perform the operation of grasping the bottle cap and the operation of tightening the bottle cap.

[0003] In the existing capping device, in order to ensure that the rotary driver can drive the capping mechanism to rotate when the capping mechanism is at different heights, the lifting mechanism is usually set to be able to drive the capping mechanism and the rotary driver to lift and lower simultaneously. Therefore, it is necessary to separately provide mechanisms such as guide rods, sliding sleeves, and drag chains required for the lifting movements of the capping mechanism and the rotary driver, which results in more components of the capping device, more complex assembly, and higher manufacturing costs.

Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a capping device with a simple structure, which can drive the rotary driver to drive the capping mechanism to tighten the bottle cap without the rotary driver lifting and lowering along with the capping mechanism, and the overall structure of the machine is relatively simple, and the manufacturing cost is relatively low.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A capping device with a simple structure includes a first turntable, a rotary driver, a capping mechanism circumferentially and spacedly installed on the first turntable, and a cam coaxially arranged with the first turntable. An ascending and descending sliding groove is provided on the outer peripheral side of the cam. It is characterized in that the capping mechanism includes a capping arm, a transfer sleeve, a connecting component, a capping head, and a transmission shaft sleeve. The transfer sleeve is rotatably installed on the top of the capping arm and vertically slides through the first turntable. The connecting component is connected to the transfer sleeve, and the connecting component is rotatably and slidably engaged with the ascending and descending sliding groove so that the capping mechanism makes an ascending and descending movement relative to the first turntable. The transmission shaft sleeve is sleeved outside the capping arm and rotates synchronously with the capping arm. The rotary driver drives the transmission shaft sleeve to rotate. The capping head is installed at the bottom of the capping arm, and the capping arm drives the capping head to rotate synchronously to tighten the bottle cap.

[0007] In the above-mentioned capping device, the adapter sleeve is sleeved outside the capping arm, and a bearing is provided between the adapter sleeve and the capping arm to enable the capping arm to rotate relative to the adapter sleeve.

[0008] In the above-mentioned capping device, the bearing includes an upper bearing and a lower bearing. The inner wall of the adapter sleeve is provided with an upper shoulder surface and a lower shoulder surface at intervals. The outer side of the capping arm is provided with a limit nut, a spacer sleeve and a bearing seat from top to bottom. The upper bearing is clamped and fixed between the upper shoulder surface, the lower end of the limit nut and the upper end of the spacer sleeve. The lower bearing is clamped and fixed between the lower shoulder surface, the lower end of the spacer sleeve and the upper end of the bearing seat.

[0009] In the above-mentioned capping device, a support sleeve is also sleeved on the outer side of the capping arm. The upper end of the support sleeve abuts against the bottom surface of the lower bearing. A sealing ring is clamped between the support sleeve and the bearing seat. A sleeve limiting ring is provided on the outer side of the capping arm. The transmission shaft sleeve is axially limited between the limiting ring and the lower end of the support sleeve.

[0010] In the above-mentioned capping device, the connection assembly includes a connection head and a connection plate provided at the top of the connection head. The connection head is inserted into the top of the adapter sleeve and connected to the adapter sleeve. The connection plate is provided with a first roller slidably matched with the lifting chute.

[0011] In the above-mentioned capping device, the capping head includes a capping head and a capping sleeve sleeved on the top of the capping head. The capping sleeve is connected to the capping arm. A push rod in vertical sliding fit is arranged inside the capping arm. The bottom end of the push rod passes through the capping head. A pin rod is provided at the top end of the push rod, and a second roller rotatably installed on the pin rod. A preloading spring is arranged inside the capping sleeve. The preloading spring supports the push rod upward so that the second roller elastically abuts against the bottom surface of the cam. A first chute extending vertically is provided on the connection plate. One end of the pin rod is slidably matched with the first chute.

[0012] In the above-mentioned capping device, the first turntable includes a first disc body, a mounting hole provided on the first disc body, and a guide sleeve fixed at the mounting hole. The adapter sleeve is slidably matched with the guide sleeve. A second chute extending vertically is provided on the outer side of the guide sleeve. A limiting rod slidably matched with the second chute is fixedly connected to the outer side of the connection plate.

[0013] In the above-mentioned capping device, the rotary drive includes a gear disc coaxially arranged with the first turntable and a motor for driving the gear disc to rotate. Teeth meshing and driving with the transmission shaft sleeve are provided on the outer peripheral side of the gear disc.

[0014] In the above-mentioned capping device, the transmission shaft sleeve is connected to the capping arm through a keyway; or the transmission shaft sleeve has a non-circular hole, and the capping arm has a non-circular section with a non-circular cross-section, and the non-circular section cooperates with the non-circular hole.

[0015] In the above-mentioned capping device, the capping device further includes a second turntable coaxially arranged with the first turntable. The second turntable is located below the first turntable and rotates synchronously with the first turntable. The second turntable is provided with a guide hole, and the second turntable is provided with a guide hole through which the capping arm passes.

[0016] Advantages of the present invention:

[0017] In the present invention, the capping arm is hung in the lifting chute of the cam through a connecting component. As the first turntable drives the capping arm to rotate synchronously, the connecting component rotates along the lifting chute and drives the capping arm to make a lifting motion through a transfer sleeve. At the same time, it also drives the transmission shaft sleeve to make a synchronous lifting motion. When the capping arm moves to the low position, the capping head grabs the bottle cap. When the capping arm moves to the high position, the capping head covers the bottle cap on the bottle filled with the product. At this time, the rotary drive drives the transmission shaft sleeve to rotate, so as to drive the capping arm to rotate self - rotatably through the transmission shaft sleeve and then drive the capping head to rotate, so as to tighten the bottle cap on the bottle. It should be noted that since the transfer sleeve is rotatably installed on the top of the capping arm, the transfer sleeve does not rotate when the capping arm rotates self - rotatably. By adopting the technical solution of the present invention, only by ensuring the axial length of the transmission shaft sleeve, the transmission shaft sleeve can always be in transmission connection with the rotary drive during the lifting process of the capping arm, without the need for the rotary drive to move up and down with the capping mechanism, that is, the position of the rotary drive remains unchanged in the height direction. Thus, the complex parts required for the lifting of the rotary drive in the prior art are omitted, that is, the number of parts required for the rotating device is greatly reduced, making the overall structure of the machine simpler, thereby reducing the manufacturing cost.

[0018] The transfer sleeve is sleeved outside the capping arm, and a bearing is provided between the transfer sleeve and the capping arm to enable the capping arm to rotate relative to the transfer sleeve. With such a design, by setting the bearing, the friction force received when the capping arm rotates relative to the transfer sleeve can be effectively reduced, so that the capping arm rotates more smoothly and the rotational accuracy of the capping arm is improved.

[0019] The bearing includes an upper bearing and a lower bearing. The inner wall of the transfer sleeve is provided with an upper shoulder surface and a lower shoulder surface at intervals. The outside of the capping arm is provided with a limit nut, a spacer sleeve and a bearing seat from top to bottom. The upper bearing is clamped and fixed between the upper shoulder surface, the lower end of the limit nut and the upper end of the spacer sleeve, and the lower bearing is clamped and fixed between the lower shoulder surface, the lower end of the spacer sleeve and the upper end of the bearing seat. By setting the upper bearing and the lower bearing, the coaxiality of the capping arm and the transfer sleeve can be ensured. At the same time, with this technical solution, the assembly difficulty of the upper bearing and the lower bearing is also reduced.

[0020] A support sleeve is also sleeved on the outer side of the capping arm. The upper end of the support sleeve abuts against the bottom surface of the lower bearing. A sealing ring is clamped between the support sleeve and the bearing seat. A set limiting ring is arranged on the outer side of the capping arm. The transmission shaft sleeve is axially limited between the limiting ring and the lower end of the support sleeve. With such a design, the inside of the adapter sleeve can be sealed through the sealing ring to achieve a dust-proof effect; moreover, the axial limit of the transmission shaft sleeve can be realized through the support sleeve and the limiting ring, and the structure is simple and the assembly is convenient.

[0021] The connecting component includes a connecting head and a connecting plate arranged on the top of the connecting head. The connecting head is inserted into the top of the adapter sleeve and connected to the adapter sleeve. The connecting plate is provided with a first roller that slidably cooperates with the lifting chute. With such a design, the upper end of the adapter sleeve can be sealed through the connecting head to prevent dust from entering the adapter sleeve; in addition, when the first turntable drives the capping arm to rotate synchronously (i.e., when the capping arm revolves), the friction between the connecting component and the cam can be reduced through the cooperation of the first roller and the lifting chute, making the sliding of the connecting component relative to the lifting chute smoother.

[0022] The capping head includes a capping screw head and a capping sleeve sleeved on the top of the capping screw head. The capping sleeve is connected to the capping arm. A push rod that slidably cooperates vertically is arranged inside the capping arm. The bottom end of the push rod passes through the capping screw head. A pin rod is arranged at the top end of the push rod, and a second roller rotatably installed on the pin rod. A preloading spring is arranged inside the capping sleeve. The preloading spring supports the push rod upward so that the second roller elastically abuts against the bottom surface of the cam. A first chute extending vertically is arranged on the connecting plate. One end of the pin rod slidably cooperates with the first chute. When performing the push cap action after screwing the bottle cap tightly, the second roller will drive the pin rod to move downward along the first chute and the push rod to move downward relative to the capping arm, and then the lower end of the push rod extends into the capping head to eject the bottle cap, realizing the separation of the bottle cap and the capping head. When performing the cap grasping action after the push cap action is completed, the preloading spring will drive the push rod to move upward and reset relative to the capping arm to avoid interfering with the cap grasping action.

[0023] The first turntable includes a first disk body, a mounting hole arranged on the first disk body, and a guide sleeve fixed at the mounting hole. The adapter sleeve slidably cooperates with the guide sleeve. A second chute extending vertically is arranged on the outer side of the guide sleeve. A limiting rod that slidably cooperates with the second chute is fixedly connected to the outer side of the connecting plate. With such a design, the self-rotation of the guide sleeve can be prevented through the cooperation of the limiting rod and the second chute, thereby improving the installation reliability of the guide sleeve.

[0024] The rotary drive includes a gear disk coaxially arranged with the first turntable and a motor that drives the gear disk to rotate. Tooth teeth meshing and driving with the transmission shaft sleeve are arranged on the outer peripheral side of the gear disk. With such a design, all the transmission shaft sleeves can be driven to rotate by using one gear disk. Compared with driving one transmission shaft sleeve by one rotary drive, with such a design, the number of parts is less and the manufacturing cost is lower.

[0025] The capping device further includes a second turntable coaxially arranged with the first turntable. The second turntable is located below the first turntable and rotates synchronously with the first turntable. The second turntable is provided with a guiding hole through which the capping arm passes. With such a design, the lower end of the capping arm can be positioned to prevent the capping arm from tilting, thereby ensuring that the capping arm is in a vertical state for convenient cap grasping.

[0026] 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

[0027] The present invention will be further described below in conjunction with the drawings:

[0028] Figure 1 It is a partial structural schematic diagram of the capping device in Embodiment 1 of the present invention;

[0029] Figure 2 is Figure 1 a cross-sectional view of;

[0030] Figure 3 is Figure 2 a partial enlarged schematic diagram of A in;

[0031] Figure 4 It is a structural schematic diagram of the capping mechanism in Embodiment 2 of the present invention;

[0032] Figure 5 It is a cross-sectional view of the capping mechanism in Embodiment 2 of the present invention.

[0033] Reference numerals:

[0034] 100, first turntable; 110, first disk body; 111, mounting hole; 120, guiding sleeve; 121, second sliding groove; 200, capping mechanism; 210, capping arm; 211, limit nut; 212, spacer sleeve; 213, bearing seat; 214, support sleeve; 215, limit ring; 220, adapter sleeve; 221, upper shoulder surface; 222, lower shoulder surface; 230, connection assembly; 231, connection head; 232, connection plate; 2321, first sliding groove; 233, first roller; 234, third roller; 235, limit rod; 240, capping head; 250, transmission shaft sleeve; 260, bearing; 261, upper bearing; 262, lower bearing; 270, push rod; 271, pin rod; 272, second roller; 300, cam; 310, lifting sliding groove; 400, second turntable.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in the implementation manners without creative efforts fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] Referring to Figures 1 to 3 As shown, the capping device in this embodiment includes a first turntable 100, a rotary driver (not shown in the figure), a plurality of capping mechanisms 200 circumferentially and spacedly installed on the first turntable 100, and a cam 300 coaxially arranged with the first turntable 100. The cam 300 is fixed, and a lifting chute 310 is provided on the outer peripheral side of the cam 300. The lifting chute 310 successively includes a cap-grabbing area, a first transition area, a capping area, and a second transition area. The height of the cap-grabbing area remains unchanged, the height of the capping area remains unchanged, the height of the capping area is greater than the height of the cap-grabbing area. The first transition area is for the transition from the cap-grabbing area to the capping area, and the second transition area is for the transition from the capping area to the cap-grabbing area. The capping mechanism 200 includes a capping arm 210, a transfer sleeve 220, a connecting assembly 230, a capping head 240, and a transmission shaft sleeve 250. Among them, the transfer sleeve 220 is rotatably installed at the top of the capping arm 210 and vertically slides through the first turntable 100. The connecting assembly 230 is connected to the transfer sleeve 220, and the connecting assembly 230 is rotatably and slidably matched with the lifting chute 310 so that the capping mechanism 200 makes a lifting movement relative to the first turntable 100. The transmission shaft sleeve 250 is sleeved outside the capping arm 210 and rotates synchronously with the capping arm 210. The rotary driver drives the transmission shaft sleeve 250 to rotate, and the capping head 240 is installed at the bottom of the capping arm 210. The capping arm 210 drives the capping head 240 to rotate synchronously to tighten the bottle cap.

[0038] In this embodiment, the capping arm 210 is hung in the lifting chute 310 of the cam 300 through the connecting component 230. As the first turntable 100 drives the capping arm 210 to rotate synchronously, the connecting component 230 rotates along the lifting chute 310 and drives the capping arm 210 to perform a lifting motion through the adapter sleeve 220. At the same time, it also drives the transmission shaft sleeve 250 to perform synchronous lifting motion. When the capping arm 210 moves to the low position (i.e., when the connecting component 230 cooperates with the cap-grabbing area), the capping head 240 grabs the bottle cap. When the capping arm 210 moves to the high position (i.e., when the connecting component 230 cooperates with the capping area), the capping head 240 caps the bottle cap on the bottle filled with the product. The rotary drive drives the transmission shaft sleeve 250 to rotate, thereby driving the capping arm 210 to rotate itself through the transmission shaft sleeve 250 and then driving the capping head 240 to rotate to tighten the bottle cap on the bottle. It should be noted that since the adapter sleeve 220 is rotatably installed on the top of the capping arm 210, the adapter sleeve 220 does not rotate when the capping arm 210 rotates itself. By adopting the technical solution of this embodiment, only by ensuring the axial length of the transmission shaft sleeve 250, the transmission shaft sleeve 250 can always be in transmission connection with the rotary drive during the lifting process of the capping arm 210, without the need for the rotary drive to move up and down with the capping mechanism 200, that is, the position of the rotary drive remains unchanged in the height direction. Thus, the complex parts required for the lifting of the rotary drive in the prior art are eliminated, that is, the number of parts required for the rotating device is greatly reduced, making the overall structure of the machine simpler, thereby reducing the manufacturing cost.

[0039] Specifically, in order to rotatably mount the adapter sleeve 220 on the top of the cap-rotating arm 210, in this embodiment, the adapter sleeve 220 is sleeved outside the cap-rotating arm 210, and a bearing 260 is provided between the adapter sleeve 220 and the cap-rotating arm 210. The bearing 260 includes an upper bearing 261 and a lower bearing 262. The inner wall of the adapter sleeve 220 is provided with an upper shoulder surface 221 and a lower shoulder surface 222 at intervals. A limit nut 211, a spacer sleeve 212 and a bearing seat 213 are sleeved on the outer side of the cap-rotating arm 210 from top to bottom. The limit nut 211 is threadedly connected to the cap-rotating arm 210. The top surface of the upper bearing 261 abuts against the upper shoulder surface 221 and the bottom surface of the limit nut 211, while the spacer sleeve 212 is clamped and fixed between the upper bearing 261 and the lower bearing 262, so that the bottom surface of the upper bearing 261 abuts against the top surface of the spacer sleeve 212; the bearing seat 213 is installed at the bottom end of the adapter sleeve 220 by means of screw connection or threaded connection. The lower bearing 262 is clamped and fixed between the bearing seat 213 and the spacer sleeve 212. At this time, the top surface of the lower bearing 262 abuts against the bottom surface of the spacer sleeve 212 and the lower shoulder surface 222, and the bottom surface of the lower bearing 262 abuts against the top surface of the bearing seat 213. By providing the upper bearing 261 and the lower bearing 262, while the cap-rotating arm 210 can rotate relative to the adapter sleeve 220, the coaxiality between the cap-rotating arm 210 and the adapter sleeve 220 can be ensured. At the same time, such a design also reduces the assembly difficulty of the upper bearing 261 and the lower bearing 262; finally, by providing the bearing 260, the friction force when the cap-rotating arm 210 rotates relative to the adapter sleeve 220 can be effectively reduced, so that the cap-rotating arm 210 rotates more smoothly and the rotation accuracy of the cap-rotating arm 210 is improved.

[0040] It can be understood that in other embodiments of the present invention, the limit nut can be omitted. At this time, the top surface of the upper bearing abuts against the upper shoulder surface.

[0041] In order to realize that the adapter sleeve 220 vertically slides through the first turntable 100, the first turntable 100 in this embodiment includes a first disc body 110, a mounting hole 111 provided on the first disc body 110, and a guide sleeve 120 fixed at the mounting hole 111. A circlip is sleeved at the lower end of the guide sleeve 120, and a step surface is provided at the upper end of the guide sleeve 120. The first disc body 110 is clamped and fixed between the step surface and the circlip, so as to realize the installation and fixation of the guide sleeve 120 on the first disc body 110, and the assembly is relatively simple and convenient; the adapter sleeve 220 is arranged to penetrate through the guide sleeve 120 and is in sliding fit with the guide sleeve 120, thereby realizing that the adapter sleeve 220 vertically slides through the first turntable 100.

[0042] It can be understood that in other embodiments of the present invention, the guide sleeve can also be fixed on the first disc body by means of screw connection.

[0043] It can be understood that in other embodiments of the present invention, the guide sleeve structure can also be omitted, and the adapter sleeve is directly in sliding fit with the mounting hole.

[0044] In addition, in this embodiment, a support sleeve 214 is sleeved outside the cap-rotating arm 210. The upper end of the support sleeve 214 abuts against the bottom surface of the lower bearing 262, and the lower end of the support sleeve 214 abuts against the first shoulder surface on the cap-rotating arm 210. A sealing ring is clamped between the support sleeve 214 and the bearing seat 213 to achieve the effect of dust prevention and prevent dust from entering the adapter sleeve 220. Moreover, a second shoulder surface is provided outside the cap-rotating arm 210 and below the first shoulder surface. The limiting ring 215 is sleeved outside the cap-rotating arm 210 and supported on the second shoulder surface of the cap-rotating arm 210. The transmission shaft sleeve 250 is axially limited between the limiting ring 215 and the lower end of the support sleeve 214. In this way, the axial limit of the transmission shaft sleeve 250 can be realized, and the structure is simple and the assembly is convenient.

[0045] In order to realize the synchronous rotation of the transmission shaft sleeve 250 and the cap-rotating arm 210, the transmission shaft sleeve 250 and the cap-rotating arm 210 in this embodiment are connected by a keyway.

[0046] It can be understood that in other embodiments of the present invention, the transmission shaft sleeve has a non-circular hole, and the cap-rotating arm has a non-circular section with a non-circular cross-section. The non-circular section is matched with the non-circular hole. With such a design, the synchronous rotation of the transmission shaft sleeve and the cap-rotating arm can also be realized.

[0047] In addition, the rotary driver in this embodiment includes a gear disk coaxially arranged with the first turntable 100 and a motor for driving the gear disk to rotate. Teeth meshing and driving the transmission shaft sleeve 250 are provided on the outer peripheral side of the gear disk. With such a design, one gear disk can be used to drive all the transmission shaft sleeves 250 to rotate at the same time. Compared with driving one transmission shaft sleeve by one rotary driver, with such a design, the number of parts is less and the manufacturing cost is lower.

[0048] It can be understood that in other embodiments of the present invention, in order to improve the controllability, the number of rotary drivers is the same as the number of rotating mechanisms. At this time, all the rotary drivers are installed on a rotary frame coaxially arranged with the first turntable and rotating synchronously, and one rotary driver drives one transmission shaft sleeve to rotate.

[0049] Secondly, the connection component 230 in this embodiment includes a connection head 231 and a connection plate 232 provided on the top of the connection head 231. The connection plate 232 extends vertically, and the connection head 231 and the connection plate 232 are integrally processed. The connection head 231 is inserted into the top of the adapter sleeve 220 to seal the upper end of the adapter sleeve 220 and prevent dust from entering the adapter sleeve 220. Two radially penetrating through-holes are symmetrically provided on the wall of the adapter sleeve 220. A pin penetrates through the two through-holes and the part of the connection head 231 inserted into the adapter sleeve 220, thereby realizing the connection between the connection head 231 and the adapter sleeve 220. First rollers 233 and third rollers 234 are vertically spaced on the connection plate 232, and the third roller 234 is located below the first roller 233. The first roller 233 is arranged in the lifting chute 310 and is slidably matched with the lifting chute 310. The thickness of the part of the lifting chute 310 between the first roller 233 and the third roller 234 remains unchanged, so that the third roller 234 always abuts against the bottom surface of the cam 300. With such a design, not only can the cooperation stability between the connection component 230 and the lifting chute 310 be increased, but also the friction between the connection component 230 and the cam 300 can be reduced, making the sliding of the connection component 230 relative to the lifting chute 310 smoother.

[0050] In order to prevent the guide sleeve 120 from rotating when the cap-rotating arm 210 rotates, a vertically extending second chute 121 is provided on the outer side of the guide sleeve 120 in this embodiment. A vertically extending limiting rod 235 is fixedly connected to the side of the connection plate 232 facing away from the cam 300 by screws. The limiting rod 235 is vertically slidably matched with the second chute 121. With such a design, the rotation of the guide sleeve 120 can be prevented through the cooperation between the limiting rod 235 and the second chute 121, thereby improving the installation reliability of the guide sleeve 120.

[0051] Finally, since the cap-rotating arm 210 is relatively long, in order to prevent the cap-rotating arm 210 from tilting, the cap-rotating device in this embodiment further includes a second turntable 400 coaxially arranged with the first turntable 100. The second turntable 400 is located below the first turntable 100 and rotates synchronously with the first turntable 100. A guide hole for the cap-rotating arm 210 to pass through is provided on the second turntable 400. The cap-rotating arm 210 can slide vertically and rotate circumferentially relative to the guide hole. With such a design, the lower end of the cap-rotating arm 210 can be positioned by the second turntable 400 to prevent the cap-rotating arm 210 from tilting, and further ensure that the cap-rotating arm 210 is in a vertical state for convenient cap grasping.

[0052] Embodiment Two

[0053] As Figure 4 and Figure 5As shown, compared with the first embodiment, the difference in this embodiment is that the capping head 240 includes a cap screwing head and a capping sleeve sleeved on the top of the cap screwing head. The top of the capping sleeve is fixedly connected to the bottom end of the capping arm 210. The capping arm 210 is internally provided with a push rod 270 that slides vertically. The bottom end of the push rod 270 passes through the cap screwing head. The top end of the push rod 270 is provided with a pin rod 271 and a second roller 272 rotatably mounted on the pin rod 271. A preloading spring is provided in the capping sleeve. The preloading spring upwardly supports the push rod 270 so that the second roller 272 is always elastically abutted against the bottom surface of the cam 300. A first chute 2321 extending vertically is provided on the connecting plate 232. One end of the pin rod 271 is slidably engaged with the first chute 2321. In addition, in this embodiment, the distance between the part of the bottom surface of the cam corresponding to the capping area and the bottom surface of the lifting chute 310 is greater than the distance between the part of the bottom surface of the cam corresponding to the cap grasping area and the bottom surface of the lifting chute 310. When the first roller 233 cooperates with the cap grasping area, the pin rod 271 is located at the upper end of the first chute 2321. When the first roller 233 cooperates with the capping area, the pin rod 271 is located at the lower end of the first chute 2321. In this way, when performing the push cap action after tightening the bottle cap, that is, when the first roller 233 cooperates with the capping area, since the bottom surface of the cam 300 presses the second roller 272 downward, the pin rod 271 moves downward along the first chute 2321 and the push rod 270 moves downward relative to the capping arm 210. Therefore, the lower end of the push rod 270 can extend into the capping head to eject the bottle cap, realizing the separation of the bottle cap from the capping head. When performing the cap grasping action after the push cap action is completed, that is, when the first roller 233 cooperates with the cap grasping area, the preloading spring will drive the push rod 270 to move upward and reset relative to the capping arm 210 to avoid interfering with the cap grasping action.

[0054] It should be noted that the capping head in this embodiment is a prior art, and this embodiment only improves the connection method between the push rod 270 and the connecting plate 232.

[0055] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A capping device with a simple structure, comprising a first turntable, a rotary driver, a capping mechanism circumferentially and spacedly installed on the first turntable, and a cam coaxially arranged with the first turntable, wherein a lifting chute is provided on the outer peripheral side of the cam, characterized in that, The capping mechanism includes a capping arm, a transfer sleeve, a connecting component, a capping head, and a transmission shaft sleeve. The transfer sleeve is rotatably installed at the top of the capping arm and vertically slides through the first turntable. The connecting component is connected to the transfer sleeve, and the connecting component is rotatably and slidably engaged with the lifting chute so that the capping mechanism makes a lifting movement relative to the first turntable. The transmission shaft sleeve is sleeved outside the capping arm and rotates synchronously with the capping arm. The rotary driver drives the transmission shaft sleeve to rotate. The capping head is installed at the bottom of the capping arm, and the capping arm drives the capping head to rotate synchronously to tighten the bottle cap. A bearing is provided between the transfer sleeve and the capping arm to enable the capping arm to rotate relative to the transfer sleeve. The bearing includes an upper bearing and a lower bearing. The inner wall of the transfer sleeve is provided with an upper shoulder surface and a lower shoulder surface at intervals. The outer side of the capping arm is provided with a limit nut, a spacer sleeve, and a bearing seat from top to bottom. The upper bearing is clamped and fixed between the upper shoulder surface, the lower end of the limit nut, and the upper end of the spacer sleeve. The lower bearing is clamped and fixed between the lower shoulder surface, the lower end of the spacer sleeve, and the upper end of the bearing seat. A support sleeve is also sleeved outside the capping arm, and the upper end of the support sleeve abuts against the bottom surface of the lower bearing. A sealing ring is clamped between the support sleeve and the bearing seat. A sleeve limit ring is provided on the outer side of the capping arm, and the transmission shaft sleeve is axially limited between the limit ring and the lower end of the support sleeve. The connecting component includes a connecting head and a connecting plate provided at the top of the connecting head. The connecting head is inserted into the top of the transfer sleeve and connected to the transfer sleeve. The connecting plate is provided with a first roller slidably engaged with the lifting chute. The capping head includes a capping head and a capping sleeve sleeved on the top of the capping head. The capping sleeve is connected to the capping arm. A push rod that slides vertically is provided inside the capping arm. The bottom end of the push rod passes through the capping head. A pin rod is provided at the top end of the push rod, and a second roller rotatably installed on the pin rod. A preloading spring is provided inside the capping sleeve, and the preloading spring supports the push rod upward so that the second roller elastically abuts against the bottom surface of the cam. A first chute extending vertically is provided on the connecting plate, and one end of the pin rod is slidably engaged with the first chute. The first turntable includes a first disk body, a mounting hole provided on the first disk body, and a guide sleeve fixed at the mounting hole. The transfer sleeve is slidably engaged with the guide sleeve. A second chute extending vertically is provided on the outer side of the guide sleeve, and a limit rod slidably engaged with the second chute is fixedly connected to the outer side of the connecting plate.

2. The simple-structured cap screwing device according to claim 1, characterized in that The transfer sleeve is sleeved outside the capping arm.

3. A simple-structured cap screwing device according to claim 1 or 2, characterized in that, The rotary driver includes a gear disk coaxially arranged with the first turntable and a motor that drives the gear disk to rotate. Tooth teeth meshing and driving with the transmission shaft sleeve are provided on the outer peripheral side of the gear disk.

4. A simple-structured cap screwing device according to claim 1 or 2, characterized in that, The transmission shaft sleeve is connected to the capping arm through a keyway; or the transmission shaft sleeve has a non-circular hole, and the capping arm has a non-circular section with a non-circular cross-section, and the non-circular section is matched with the non-circular hole.

5. A simple-structured cap screwing device as claimed in claim 1 or 2, characterized in that, The capping device further includes a second turntable coaxially arranged with the first turntable. The second turntable is located below the first turntable and rotates synchronously with the first turntable. A guiding hole for the capping arm to pass through is provided on the second turntable.

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