Bottle cap centering device and cap screwing machine

Abstract

The application discloses a bottle cap centering device and a cap screwing machine. The bottle cap centering device comprises a main shaft, a plurality of driving assemblies and a plurality of bottle clamping assemblies. The rotation axis of the main shaft is vertically arranged. The main shaft comprises a shaft body and a ring-shaped mounting plate. The mounting plate is horizontally arranged and surrounds the shaft body. The plurality of driving assemblies and the plurality of bottle clamping assemblies are fixed on the mounting plate and surround the shaft body. The bottle clamping assembly comprises a first clamping jaw and a second clamping jaw. The first clamping jaw and the second clamping jaw are opened and closed under the action of the driving assembly. When the first clamping jaw and the second clamping jaw are closed, a first cavity in the shape of an inverted truncated cone is formed. The bottle cap centering device controls the opening and closing of the first clamping jaw and the second clamping jaw of the bottle clamping assembly through the driving assembly. When the cap screwing operation is performed, the bottle cap falling into the cavity in the shape of an inverted truncated cone automatically moves to the center of the cavity due to the shape of the cavity, high-precision centering is realized, and the bottle cap with an insertion part can smoothly enter the inside of a bottle mouth.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging machinery, in particular to a bottle cap centering device and a cap screwing machine. BACKGROUND

[0002] At present, some bottle caps of washing-up liquid and laundry liquid on the market have special shapes, such as Figure 1 As shown in the figure, the lower part of the bottle cap with an insertion part needs to be inserted into the bottle mouth before screwing, and the gap between the inserted part and the bottle mouth is small, generally only 0.5 mm, so there is a high requirement for the centering accuracy of the bottle cap. The conventional cap screwing machine only adjusts the centering of the bottle cap and the bottle mouth by the centering rod during operation, which cannot meet the accuracy requirement of the above-mentioned bottle cap installation, and is prone to cause cap screwing failure or high skew cap due to the vibration of the cap screwing machine and the centering deviation of the bottle clamping mechanism. SUMMARY

[0003] The first object of the present application is to provide a bottle cap centering device which can realize high-precision centering of the bottle cap and the bottle mouth and meet the installation requirements of the bottle cap with an insertion part.

[0004] The second object of the present application is to provide a cap screwing machine which can accurately center the bottle cap and has a wide range of applications.

[0005] To achieve the above objects, the present application adopts the following technical solutions:

[0006] On the one hand, a bottle cap centering device is provided, which comprises a main shaft, a plurality of drive assemblies and a plurality of bottle clamping assemblies. The rotation axis of the main shaft is vertically arranged. The main shaft comprises a shaft body and a ring-shaped mounting plate. The mounting plate is horizontally arranged and surrounds the shaft body. The plurality of drive assemblies and the plurality of bottle clamping assemblies are fixed on the mounting plate and surround the shaft body. The bottle clamping assembly comprises a first clamping jaw and a second clamping jaw. The first clamping jaw and the second clamping jaw are opened and closed under the action of the drive assembly. The first clamping jaw and the second clamping jaw form a first cavity in the shape of an inverted truncated cone when they are closed.

[0007] As a preferred scheme of the present application, the plurality of bottle clamping assemblies are equally spaced on the outside of the mounting plate, and the plurality of drive assemblies are arranged on the inside of the mounting plate.

[0008] As a preferred scheme of the present application, the driving assembly comprises a cylinder, a bracket and a connecting piece, the cylinder is fixed on the bracket and arranged horizontally, a first through hole is formed in the bracket in vertical direction, a first bearing is arranged in the first through hole, a first threaded hole is formed in the mounting plate, the bracket is fixed by a bolt penetrating through the first bearing and being threadedly connected with the mounting plate, one end of the connecting piece is connected with a piston rod of the cylinder, the other end of the connecting piece is provided with a second through hole for connecting with the first jaw, the second through hole is formed in vertical direction.

[0009] As a preferred scheme of the present application, a second bearing is arranged in the second through hole, a second threaded hole is formed in the first jaw, the first jaw and the connecting piece are connected by a pin shaft penetrating through the second bearing and being threadedly connected with the first jaw.

[0010] As a preferred scheme of the present application, an end of the pin shaft away from the first jaw is provided with a bayonet mounting hole.

[0011] As a preferred scheme of the present application, a second cavity for accommodating the bottle mouth is further formed below the first cavity, a cavity wall of the second cavity is fitted with an outer wall of the bottle mouth.

[0012] As a preferred scheme of the present application, the first jaw and the second jaw each comprise a rotating block and a bottle clamping block, the rotating block and the bottle clamping block are detachably connected, intermeshing gear structures are arranged on two rotating blocks, and the two bottle clamping blocks form the first cavity when closed.

[0013] On the other hand, a cap screwing machine is provided, comprising the bottle cap centering device of any of the above technical schemes.

[0014] As a preferred scheme of the present application, a bottle clamping plate is further arranged on the mounting plate, the bottle clamping plate is arranged below the bottle clamping assembly and protrudes from an edge of the mounting plate, the bottle clamping plate abuts against one side of the bottle mouth, and the other side of the bottle mouth is provided with a bottle protecting plate abutting against the bottle mouth.

[0015] As a preferred scheme of the present application, the cap screwing machine further comprises a cap screwing head, the cap screwing head is arranged above the bottle clamping assembly.

[0016] The present application has the following beneficial effects:

[0017] The bottle cap centering device of the present application controls the opening and closing of the first and second clamping jaws of the bottle clamping assembly through the driving assembly. When the cap screwing operation is needed, the first and second clamping jaws are closed to form a rounded table type cavity. The bottle cap falling from above into the rounded table type cavity is automatically moved to the center of the cavity due to the shape of the cavity, achieving high-precision centering. The bottle cap with an insertion part can smoothly enter the inside of the bottle mouth, and the bottle cap will not collide with the bottle mouth to cause cap screwing failure or high skew cap and other adverse phenomena caused by insufficient centering precision. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the bottle cap centering device of the embodiment of the present application.

[0019] Figure 2 It is a cross-sectional view of the bottle clamping assembly of the embodiment of the present application.

[0020] Figure 3 It is a cross-sectional view of the connection structure of the driving assembly and the bottle clamping assembly of the embodiment of the present application.

[0021] Figure 4 It is a schematic view of the first and second clamping jaws when closed.

[0022] Figure 5 It is a schematic view of the first and second clamping jaws when separated.

[0023] Figure 6 It is a cross-sectional view of the cap screwing machine of the embodiment of the present application.

[0024] Figure 7 It is Figure 6 It is an enlarged view of position A.

[0025] Figure 8 It is a schematic view of the bottle cap targeted by the embodiment of the present application.

[0026] In the figure:

[0027] 1, main shaft; 11, shaft body; 12, mounting plate; 2, driving assembly; 21, air cylinder; 211, piston rod; 22, bracket; 23, connecting piece; 3, bottle clamping assembly; 31, first clamping jaw; 311, first bottle clamping block; 312, first rotating block; 32, second clamping jaw; 321, second bottle clamping block; 322, second rotating block; 41, first bearing; 42, bolt; 43, second bearing; 44, pin shaft; 441, catch pin mounting hole; 5, bottle clamping plate; 6, bottle protecting plate; 7, cap screwing head; 100, first cavity; 200, second cavity; 300, bottle; 310, bottle mouth; 400, bottle cap. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be further illustrated below with reference to the accompanying drawings and specific embodiments.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0030] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0031] As shown in Figure 1 and Figure 2 The bottle cap centering device of the present embodiment includes a main shaft 1, a plurality of driving assemblies 2 and a plurality of bottle clamping assemblies 3. The rotation axis of the main shaft 1 is vertically arranged. The main shaft 1 includes a shaft body 11 and a ring-shaped mounting plate 12. The mounting plate 12 is horizontally arranged and surrounds the shaft body 11. The plurality of driving assemblies 2 and the plurality of bottle clamping assemblies 3 are both fixed on the mounting plate 12 and surround the shaft body 11. The bottle clamping assembly 3 includes a first clamping jaw 31 and a second clamping jaw 32. The driving assembly 2 is connected with the first clamping jaw 31. The driving assembly 2 drives the first clamping jaw 31 and the second clamping jaw 32 to rotate in the horizontal plane. When the first clamping jaw 31 and the second clamping jaw 32 are closed, a first cavity 100 in the shape of an inverted truncated cone is formed.

[0032] Figure 8 As shown, the bottle cap 400 with an insertion part at the lower end has a very high requirement for the centering accuracy when the cap is screwed. The existing centering method cannot provide sufficient centering accuracy for the installation of such a bottle cap 400. The bottle cap centering device of the present embodiment controls the opening and closing of the first clamping jaw 31 and the second clamping jaw 32 of the bottle clamping assembly 3 through the driving assembly 2. When the screwing operation is needed, the first clamping jaw 31 and the second clamping jaw 32 are closed to form the first cavity 100 in the shape of an inverted truncated cone. Figure 7 As shown, the bottle cap 400 falling into the first cavity 100 from above is automatically moved to the center of the first cavity 100 due to the shape of the inverted truncated cone, thereby achieving high-precision centering. The bottle cap 400 can smoothly enter the inside of the bottle mouth 310, and the bottle cap 400 will not collide with the bottle mouth 310 to cause the screwing failure or the high-wrong cap and other adverse phenomena caused by insufficient centering accuracy.

[0033] As Figure 2 shown, further, a second cavity 200 for accommodating the bottle mouth 310 is also formed below the first cavity 100, the cavity wall of the second cavity 200 is in close contact with the outer wall of the bottle mouth 310. The bottle clamping assembly 3 directly limits the bottle mouth 310, when the first clamping jaw 31 and the second clamping jaw 32 are closed, the first cavity 100 with centering function and the second cavity 200 with limiting function are formed at the same time, which greatly improves the centering accuracy and efficiency of the bottle cap 400.

[0034] Preferably, a plurality of bottle clamping assemblies 3 are arranged at equal intervals on the outside of the mounting plate 12, and a plurality of driving assemblies 2 are arranged on the inside of the mounting plate 12. Compared with the mode of arranging the driving assembly 2 on the outside of the mounting plate 12, i.e. arranging the driving assembly 2 between two bottle clamping assemblies 3, this arrangement mode of the embodiment makes more effective use of the space on the mounting plate 12, so that the bottle cap centering device of the embodiment is more compact and occupies a smaller volume.

[0035] In some embodiments, the mounting plate 12 is arranged in a stepped structure, and the mounting surface of the plurality of driving assemblies 2 is higher than the mounting surface of the plurality of bottle clamping assemblies 3. By staggering the driving assembly 2 and the bottle clamping assembly 3 in the height direction by a certain distance, the interference between the two can be reduced, the structural arrangement is facilitated, and the normal operation of the device is ensured.

[0036] As Figures 3 to 5 shown, further, the driving assembly 2 includes a cylinder 21, a bracket 22 and a connecting piece 23. The cylinder 21 is fixed on the bracket 22 and arranged horizontally. The bracket 22 is provided with a first through hole in the vertical direction, and the first through hole is provided with a first bearing 41. The mounting plate 12 is provided with a first threaded hole. The bracket 22 is fixed by a bolt 42 which passes through the first bearing 41 and is threadedly connected with the mounting plate 12. One end of the connecting piece 23 is connected with the piston rod 211 of the cylinder 21, and the other end of the connecting piece 23 is provided with a second through hole for connecting with the first clamping jaw 31, and the second through hole is arranged in the vertical direction. Since the first clamping jaw 31 connected with the cylinder 21 performs rotational motion rather than linear motion, when the cylinder 21 pulls the first clamping jaw 31, the angle of the piston rod 211 will also swing in the horizontal plane to a small extent. If the cylinder 21 is fixed directly, the piston rod 211 will be stuck and cannot smoothly play the function of opening and closing the bottle clamping assembly 3 by pulling the first clamping jaw 31. The bracket 22 is sleeved outside the first bearing 41, which realizes the function of swinging of the cylinder 21 in the horizontal plane to a certain extent, so that the cylinder 21 can deflect with the opening and closing degree of the first clamping jaw 31 and the second clamping jaw 32, and ensures that the piston rod 211 will not be stuck.

[0037] In other embodiments, the driving assembly 2 can adopt the form of an electric cylinder or an oil cylinder.

[0038] Further, the second through hole is provided with a second bearing 43, and the first clamping jaw 31 is provided with a second threaded hole, and the first clamping jaw 31 and the connecting piece 23 are connected by a pin shaft 44 penetrating through the second bearing 43 and being threadedly connected with the first clamping jaw 31. Since the connecting piece 23 is connected with the piston rod 211, the connecting piece 23 will also swing in a horizontal plane by a certain amplitude, and if the connecting piece 23 is directly fixed with the first clamping jaw 31 by welding or the like, the connecting piece 23 will not be able to swing smoothly, and the normal pulling function of the driving assembly 2 on the first clamping jaw 31 cannot be realized, and by sleeving the connecting piece 23 outside the second bearing 43, the connecting piece 23 can swing in a horizontal plane by a certain amplitude, so that the driving assembly 2 can control the smooth opening and closing of the bottle clamping assembly 3.

[0039] Further, the end of the pin shaft 44 away from the first clamping jaw 31 is provided with a bayonet mounting hole 441, so that the pin shaft 44 can be better fixed and prevented from loosening.

[0040] Preferably, the first clamping jaw 31 comprises a first bottle clamping block 311 and a first rotating block 312, the first bottle clamping block 311 and the first rotating block 312 are detachably connected, the second clamping jaw 32 comprises a second bottle clamping block 321 and a second rotating block 322, the second bottle clamping block 321 and the second rotating block 322 are detachably connected, and the first rotating block 312 and the second rotating block 322 are provided with gear structures that are engaged with each other, so that the driving assembly 2 only needs to be connected with the first bottle clamping block 311 to control the opening and closing of the bottle clamping assembly 3, and the first bottle clamping block 311 and the second bottle clamping block 321 form a first cavity 100 in the shape of an inverted circular table when closed. By arranging the first clamping jaw 31 and the second clamping jaw 32 as two separate parts, the bottle 300 with different specifications of bottle mouths 310 can be operated to screw on the caps only by replacing the first bottle clamping block 311 and the second bottle clamping block 321, and the production efficiency is improved.

[0041] Specifically, the first bottle clamping block 311 and the first rotating block 312, and the second bottle clamping block 321 and the second rotating block 322 can be connected in the form of screw connection.

[0042] The embodiments of the present application also provide a cap screwing machine, which comprises the cap centering device of any of the above embodiments, so that the cap 400 can be accurately centered, and the installation requirements of the cap 400 with an insertion part at the lower end can be met.

[0043] As Figure 6 and Figure 7As shown, preferably, the mounting plate 12 is further provided with a bottle clamping plate 5, which is arranged below the bottle clamping assembly 3 and protrudes from the edge of the mounting plate 12, and abuts against one side of the bottle mouth 310. The other side of the bottle mouth 310 is provided with a bottle protecting plate 6 abutting against the bottle mouth 310. The bottle clamping plate 5 and the bottle protecting plate 6 can preliminarily limit the bottle mouth 310. After the preliminary limitation of the bottle mouth 310 is completed, the bottle mouth 310 is accurately limited by the bottle clamping assembly 3. Compared with directly limiting the bottle mouth 310 by the bottle clamping assembly 3 once, the two-step limitation reduces the vibration amplitude when the bottle mouth 310 contacts the bottle clamping assembly 3, so that the bottle mouth 310 is more stable during the capping process, and the capping quality is better.

[0044] Further, the capping machine further comprises a capping head 7, which is arranged above the bottle clamping assembly 3. The capping head 7 clamps the bottle cap 400 at the lower end and sends the bottle cap 400 into the bottle mouth 310 from above the bottle clamping assembly 3. In the actual capping process, after the lower end of the bottle cap 400 is inserted into the bottle mouth 310 by about 5 mm, the centering work of the bottle cap 400 is completed. At this time, the piston rod 211 of the driving assembly 2 is retracted, the first clamping jaw 31 and the second clamping jaw 32 are quickly separated, and space is left for the capping head 7 to continue to descend. The capping head 7 rotates and descends at the same time, and the bottle cap 400 is screwed onto the bottle mouth 310. After the capping is completed, the capping head 7 rises and performs the next capping operation.

[0045] As a preferred embodiment of the present application, in the description of the present application, the description of the terms "preferably" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above embodiments are only used to illustrate the detailed schemes of the present application, and the present application is not limited to the above detailed schemes, i.e., it does not mean that the present application must rely on the above detailed schemes to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of each raw material of the product of the present application, addition of auxiliary ingredients, selection of specific modes, etc. fall within the protection scope and disclosure scope of the present application.

Claims

1. A bottle cap centering device characterized by, The bottle cap centering device comprises a main shaft, a plurality of drive assemblies and a plurality of bottle clamping assemblies, the rotation axis of the main shaft is vertically arranged, the main shaft comprises a shaft body and a ring-shaped mounting plate, the mounting plate is horizontally arranged and surrounds the shaft body, the plurality of drive assemblies and the plurality of bottle clamping assemblies are fixed on the mounting plate and surround the shaft body, the bottle clamping assembly comprises a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are opened and closed under the action of the drive assembly, and the first clamping jaw and the second clamping jaw form a first cavity in the shape of an inverted truncated cone when closed. A second cavity for accommodating a bottle mouth is further formed below the first cavity, and the cavity wall of the second cavity is in contact with the outer wall of the bottle mouth. The first clamping jaw and the second clamping jaw each comprise a rotating block and a bottle clamping block, the rotating block and the bottle clamping block are detachably connected, the two rotating blocks are provided with gear structures that are in mesh with each other, and the two bottle clamping blocks form the first cavity when closed. The cap falling from above into the first cavity in the shape of an inverted truncated cone is automatically moved to the center of the first cavity to realize high-precision centering, and the cap with an insertion part smoothly enters the inside of the bottle mouth.

2. The vial cap centering device of claim 1, wherein, The plurality of bottle clamping assemblies are arranged at equal intervals outside the mounting plate, and the plurality of drive assemblies are arranged inside the mounting plate.

3. The vial cap centering device of claim 2, wherein, The drive assembly comprises a cylinder, a bracket and a connecting piece, the cylinder is fixed on the bracket and is horizontally arranged, the bracket is provided with a first through hole in the vertical direction, the first through hole is provided with a first bearing, the mounting plate is provided with a first threaded hole, the bracket is fixed by a bolt that passes through the first bearing and is threadedly connected with the mounting plate, one end of the connecting piece is connected with the piston rod of the cylinder, the other end of the connecting piece is provided with a second through hole for connecting with the first clamping jaw, and the second through hole is arranged in the vertical direction.

4. The vial cap centering device of claim 3, wherein, The second through hole is provided with a second bearing, the first clamping jaw is provided with a second threaded hole, and the first clamping jaw and the connecting piece are connected by a pin shaft that passes through the second bearing and is threadedly connected with the first clamping jaw.

5. The vial cap centering device of claim 4, wherein, One end of the pin shaft away from the first clamping jaw is provided with a bayonet mounting hole.

6. A cap screwing machine characterized by comprising: The bottle cap centering device is contained in any one of claims 1 to 5.

7. The cap screwing machine according to claim 6, characterized in that, The mounting plate is further provided with a bottle clamping plate, the bottle clamping plate is arranged below the bottle clamping assembly and protrudes from the edge of the mounting plate, the bottle clamping plate is in abutment with one side of the bottle mouth, and the other side of the bottle mouth opposite to the one side is provided with a bottle protecting plate in abutment with the bottle mouth.

8. The cap screwing machine according to claim 7, characterized in that, The bottle cap centering device further comprises a cap screwing head, and the cap screwing head is arranged above the bottle clamping assembly.

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