CN210237058U

CN210237058U - Bottle cap assembly line

Info

Publication number: CN210237058U
Application number: CN201920986429.0U
Authority: CN
Inventors: Yuge Zhu; 朱玉格; Jianxin Zhu; 朱建新
Original assignee: Hangzhou Jieyisi Technology Co ltd
Current assignee: Hangzhou Jieyisi Technology Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-03
Anticipated expiration: 2029-06-27

Abstract

A bottle cap assembly line comprises a conveyor belt device, a cosmetic clamp and a bottle cap assembly device, wherein the cosmetic clamp and the bottle cap assembly device are placed on the conveyor belt device, the bottle cap assembly device comprises bases which are arranged on two sides of the conveyor belt device in a bilateral symmetry mode, support columns are fixedly connected to the bases, cantilever beams are connected between the support columns on the left side and the right side, square holes which penetrate through the cantilever beams up and down are formed in the cantilever beams, and limiting clamp blocks are symmetrically arranged on the inner walls of the front side and the rear side; the utility model can realize the automatic assembly of the cosmetic bottle cap, optimizes the feeding and discharging operation of the bottle cap, saves the assembly time of the cosmetic bottle cap and increases the working efficiency through the flexible design of the mechanism; by utilizing a new screwing structure, the phenomenon that the cosmetic bottle cap or the cosmetic bottle body is damaged due to overlarge mechanical screwing force is avoided; the cosmetics anchor clamps of supporting design can prevent that the cosmetics body from sliding on conveyor means, has realized the accurate location of body, makes things convenient for the equipment of bottle lid.

Description

Bottle cap assembly line

Technical Field

The utility model relates to a cosmetics automated production technical field specifically is a bottle lid assembly line.

Background

The cosmetics refer to chemical industrial products or fine chemical products which are spread on any part of the surface of a human body, such as skin, hair, nails, lips and teeth, by smearing, spraying or other similar methods to achieve the purposes of cleaning, maintaining, beautifying, decorating and changing the appearance, or correcting the smell of the human body and keeping the good state, the cosmetics are more and more applied in the life of people, the cosmetics are fine chemical products, so that high sanitary requirements are brought to production enterprises of the cosmetics, a plurality of stages which need manual operation in the production of the cosmetics in China still exist, such as final covering operation of the cosmetics, the manual operation cost is high, the efficiency is low, the sanitary level of the manual operation is not as high as that of the automatic operation, and some mechanical arms for assembling cosmetic bottle covers are available in the market, however, most of them require frequent loading and unloading operations of the manipulator, so that the repetitive operations make the working efficiency of the manipulator not high, and the manipulator is not suitable for mass production.

Disclosure of Invention

An object of the utility model is to provide a bottle lid assembly line, in order to solve the problem of proposing among the background art.

In order to realize the purpose, the bottle cap assembly line comprises a conveyor belt device, a cosmetic clamp and a bottle cap assembly device, wherein the cosmetic clamp and the bottle cap assembly device are placed on the conveyor belt device, the bottle cap assembly device comprises bases which are arranged on two sides of the conveyor belt device in a bilateral symmetry manner, support columns are fixedly connected onto the bases, cantilever beams are connected between the support columns on the left side and the right side, square holes which penetrate through up and down are arranged in the cantilever beams, limiting clamp blocks are symmetrically arranged on the inner walls of the front side and the rear side of each square hole, working blocks which are matched with the limiting clamp blocks and can freely slide in the square holes in the left side and the right side are arranged in the square holes, first connecting blocks are symmetrically arranged on the upper surfaces of the working blocks in the bilateral direction, second connecting blocks are also symmetrically arranged on the upper surfaces of the cantilever beams in the bilateral symmetry manner, the bottle cap screwing device is characterized in that four telescopic rods which are distributed in a circumferential array mode with the circle center of the first circular through hole as the center are arranged in the working block, a bottle cap screwing device is arranged at the lower end of each telescopic rod, the bottle cap screwing device can move left and right in a plane by controlling the extension and retraction of the hydraulic rod, and the telescopic rods can control the bottle cap screwing device to move up and down.

Preferably, the assembling objects of the device are: the cosmetic bottle comprises a cosmetic bottle body and a cosmetic bottle cap, and is characterized in that the device is provided with a recognition unit in a matching manner and used for judging whether the cosmetic clamp clamps the cosmetic bottle body and recognizing the position isoparametric of the cosmetic bottle body, the bottle cap screwing device is opposite to the cosmetic bottle body by controlling the extension and retraction of the hydraulic rod, and the bottle cap screwing device is lowered to a specified position by controlling the telescopic rod.

Preferably, the bottle cap screwing device comprises a connecting table, the lower end of the telescopic rod penetrates through the connecting table to be provided with a threaded connecting block, a second circular through hole which penetrates through the connecting table from top to bottom is arranged in the connecting table, an mechanical arm is fixedly connected to the inner wall of the second circular through hole, a bottle cap placing hole which penetrates through the mechanical arm from top to bottom is arranged in the mechanical arm, the bottle cap placing hole is circular, two first circular ring blocks are arranged on the mechanical arm, electromagnetic devices are arranged in the first circular ring blocks on the upper side and the lower side, each electromagnetic device comprises four sliding grooves which are distributed in the inner wall of the bottle cap placing hole in a circumferential array mode and are communicated with the bottle cap placing hole, a slidable magnetic trapezoidal block is arranged in each sliding groove, a limiting groove is arranged in the inner wall of the upper side of each sliding groove, a limiting, the electromagnetic device can be composed of a block iron and a winding coil, and it is noted that four coils in the electromagnetic device on the upper side are connected in series, four coils in the electromagnetic device on the lower side are also connected in series, but the coils on the upper side and the lower side are not connected, an independent control mode is adopted, the magnetic pole direction of the electromagnetic device can be controlled by controlling the current direction in the coils, the magnetic trapezoidal block can be controlled to pop out or retract in the chute by utilizing the principle that the magnetic poles attract and repel each other, when in use, the cosmetic bottle cover is placed in the bottle cover placing hole, the magnetic trapezoidal blocks in the electromagnetic devices on the upper side and the lower side are controlled to be in the popping state, and the magnetic trapezoidal block on the upper side can be retracted in the chute by introducing reverse current to the coils in the electromagnetic device on the upper side, at the moment, the cosmetic bottle caps fall down for a short distance under the action of self gravity and are caught by the magnetic trapezoidal blocks on the lower side, then the electromagnetic device on the upper side is recovered to be supplied with forward current, the magnetic trapezoidal blocks on the upper side are popped up again and are clamped into the gap between the upper cosmetic bottle caps and the lower cosmetic bottle caps, then the coil on the lower side of the electromagnetic device is supplied with reverse current, and the magnetic trapezoidal blocks on the lower side are collected into the chute and originally positioned between the upper electromagnetic device and the lower electromagnetic device.

Preferably, a second circular block is arranged at the lower side of the two first circular blocks on the mechanical arm, a first motor is arranged in the second circular block, an output shaft at the lower end of the first motor is in power connection with a first lead screw, the second circular block is also provided with three positioning columns with smooth surfaces, the three positioning columns and one first lead screw are distributed on the second circular block in a circumferential array manner, the first lead screw is in threaded connection with a circular ring capable of sliding on the positioning columns, the lower surface of the circular ring is provided with four first connecting rods in a circumferential array manner, the lowest end of the mechanical arm is provided with four working grooves with openings pointing to the circle center of the bottle cap placing hole in a circumferential array manner, through holes communicated with the outside are arranged in the working grooves, and the first connecting rods penetrate through the through holes to enter the working grooves and are in hinged connection with the second connecting rods, the second connecting rod is hinged with a screwing working block which can slide in the working groove, a rotating wheel groove with an opening pointing to the circle center of the bottle cap placing hole is arranged in the screwing working block, a second motor is arranged in the inner wall of the upper side of the rotating wheel groove, an output shaft at the lower end of the second motor extends into the rotating wheel groove, a cylindrical sleeve is fixedly arranged in the rotating wheel groove, a sponge wheel is arranged on the surface of the cylindrical sleeve, when the cosmetic bottle cap screwing device is used, the first motor is started to drive the first lead screw to rotate, the first lead screw rotates to drive the circular ring to slide down along the positioning column through threaded fit, the first connecting rod on the circular ring drives the screwing working block to move towards the circle center of the bottle cap placing hole through the second connecting rod, the four sponge wheels deform to clamp the cosmetic bottle cap, the first motor stops the second motor to start, and the second motor drives the sponge wheels to rotate, four the sponge wheel will cosmetic bottle lid is twisted on the cosmetic bottle is physically, because the frictional force that the sponge wheel provided is limited, twist to a certain extent the sponge wheel can appear cosmetic bottle lid phenomenon of skidding on the surface has avoided the too big cosmetic bottle lid or the cosmetic bottle phenomenon of body damage that causes of mechanical twisting power.

Preferably, the diameter of the second circular through hole is smaller than that of the first circular through hole, the second circular through hole is concentric with the first circular through hole, and the upper end of the mechanical arm can penetrate into the first circular through hole.

Preferably, the cosmetic fixture comprises a fixture base, the fixture base is provided with three square grooves with upward openings and the same size, the square grooves are internally provided with convex blocks, the square grooves are internally provided with two cosmetic fixing blocks which are matched with the convex blocks and can freely slide left and right, the cosmetic fixing blocks on the left and right sides are respectively provided with three semicircular grooves, the semicircular grooves are combined together to form a complete circle, the inner walls of the semicircular grooves are provided with sponge pads, the fixture base is further provided with two bearing seats, a rotatable second lead screw is arranged between the bearing seats, the right end of the second lead screw is provided with a rotating handle, the two cosmetic fixing blocks in the square grooves are respectively internally provided with internal threads with opposite thread rotation directions, correspondingly, the threads on the second lead screw correspond to the cosmetic fixing blocks, therefore, the second lead screw adopts a sectional processing mode, so that when the second lead screw rotates, the cosmetic fixing blocks in the same square groove always move in the opposite direction or move in the opposite direction, the clamp base is further provided with two shaft fixing blocks, and a smooth rod penetrating through the cosmetic fixing blocks is arranged between the shaft fixing blocks.

To sum up, the beneficial effects of the utility model are that: the utility model can realize the automatic assembly of the cosmetic bottle cap, optimizes the feeding and discharging operation of the bottle cap, saves the assembly time of the cosmetic bottle cap and increases the working efficiency through the flexible design of the mechanism; by utilizing a new screwing structure, the phenomenon that the cosmetic bottle cap or the cosmetic bottle body is damaged due to overlarge mechanical screwing force is avoided; the cosmetics anchor clamps of supporting design can prevent that the cosmetics body from sliding on conveyor means, has realized the accurate location of body, makes things convenient for the equipment of bottle lid, and the cosmetics anchor clamps can also be applied to operations such as the filling of cosmetics in addition, and the range of application is very wide.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is also possible for a person skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an overall structure of the present invention;

fig. 2 is a plan view of the clamp of the present invention in a clamped state;

fig. 3 is a top view of the clamp of the present invention in a fully released state;

FIG. 4 is an enlarged partial schematic view of region "A" in FIG. 1;

fig. 5 is a partially enlarged schematic view of the region "B" in fig. 1.

Detailed Description

Embodiments of the invention will be described in further detail with reference to the drawings, it being understood that the examples are illustrative only and should not be taken as limiting the invention, and that all of the features disclosed in the examples or all of the steps in any method or process disclosed herein can be combined in any way, except for mutually exclusive features and/or steps.

The embodiment provides a bottle cap assembly line, which comprises a conveyor belt device 12, a cosmetic clamp 50 placed on the conveyor belt device 12 and a bottle cap assembly device, wherein the bottle cap assembly device comprises bases 10 which are bilaterally symmetrically arranged on two sides of the conveyor belt device 12, support columns 11 are fixedly connected to the bases 10, cantilever beams 63 are connected between the support columns 11 on the left side and the right side, square holes 13 which penetrate through the cantilever beams 63 from top to bottom are arranged in the cantilever beams 63, limiting clamp blocks 14 are symmetrically arranged on the inner walls of the front side and the rear side of the square holes 13, working blocks 15 which are matched with the limiting clamp blocks 14 and can freely slide in the square holes 13 from left to right are arranged in the square holes 13, first connecting blocks 17 are bilaterally symmetrically arranged on the upper surface of the working blocks 15, second connecting blocks 18 are symmetrically arranged on the upper surface of the cantilever beams 63 from left to right, and the first connecting blocks, the bottle cap screwing device is characterized in that a first circular through hole 16 which penetrates through the working block 15 from top to bottom is formed in the working block 15, four telescopic rods 20 which are distributed in a circumferential array mode with the circle center of the first circular through hole 16 as the center are arranged in the working block 15, a bottle cap screwing device is arranged at the lower end of each telescopic rod 20, stretching of the hydraulic rod 19 can be controlled to achieve the effect that the bottle cap screwing device moves left and right in a plane, and the telescopic rods 20 can control up and down movement of the bottle cap screwing device.

Advantageously, the assembly objects of the device are: the cosmetic bottle body 61 and the cosmetic bottle cap 26 are provided with a recognition unit, and the device is matched with the recognition unit and used for judging whether the cosmetic clamp 50 clamps the cosmetic bottle body 61 or not and recognizing parameters such as the position of the cosmetic bottle body 61, controlling the expansion and contraction of the hydraulic rod 19 to enable the bottle cap screwing device to be opposite to the cosmetic bottle body 61, and controlling the expansion and contraction rod 20 to enable the bottle cap screwing device to descend to a specified position.

Beneficially, the bottle cap screwing device includes a connecting table 21, a threaded connecting block 22 is arranged at the lower end of the telescopic rod 20 penetrating through the connecting table 21, a second circular through hole 23 penetrating up and down is arranged in the connecting table 21, a mechanical arm 24 is fixedly connected to the inner wall of the second circular through hole 23, a bottle cap placing hole 25 penetrating up and down is arranged in the mechanical arm 24, the bottle cap placing hole 25 is circular, two first circular ring blocks 27 are arranged on the mechanical arm 24, electromagnetic devices are arranged in the first circular ring blocks 27 on the upper and lower sides, the electromagnetic devices include four sliding grooves 28 distributed in the inner wall of the bottle cap placing hole 25 in a circumferential array manner and communicated with the bottle cap placing hole 25, slidable magnetic trapezoidal blocks 30 are arranged in the sliding grooves 28, a limiting groove 31 is arranged in the inner wall on the upper side of the sliding grooves 28, and a limiting block 32 extending into the limiting groove 31 is arranged at the upper end of, an electromagnet device 29 is arranged in the inner wall of the sliding chute 28, the electromagnet device 29 can be formed by block iron and winding coils, it is noted that four coils in the electromagnet device 29 on the upper side are connected in series, four coils in the electromagnet device 29 on the lower side are also connected in series, but the coils on the upper side and the lower side are not connected, the direction of the magnetic poles of the electromagnet device 29 can be controlled by controlling the current direction in the coils in an independent control mode, the magnetic trapezoidal blocks 30 can be controlled to pop out or retract in the sliding chute 28 by utilizing the principle that the magnetic trapezoidal blocks 30 in the electromagnet devices 29 on the upper side and the lower side are attracted and repelled by opposite polarities, when in use, the cosmetic bottle cover 26 is placed in the bottle cover placing hole 25, the magnetic trapezoidal blocks 30 in the electromagnet devices 29 on the upper side and the lower side are controlled to be in a pop-out state, and reverse current is introduced into the coils in the electromagnet device 29 on, the magnetic trapezoidal block 30 on the upper side can be accommodated in the sliding groove 28, at this time, the cosmetic bottle cap 26 drops a short distance under the action of self gravity, the cosmetic bottle cap is received by the magnetic trapezoidal block 30 on the lower side, then the electromagnetic device 29 on the upper side is restored to be supplied with forward current, the magnetic trapezoidal block 30 on the upper side pops up again, the cosmetic bottle cap 26 on the upper side is clamped in a gap between the upper cosmetic bottle cap 26 and the lower cosmetic bottle cap 26, then the coil in the electromagnetic device 29 on the lower side is supplied with reverse current, the magnetic trapezoidal block 30 on the lower side is accommodated in the sliding groove 28, the cosmetic bottle cap 26 originally positioned between the electromagnetic devices 29 on the upper side and the lower side falls to a designated position under the action of gravity, and the structure is realized that the mechanical arm can store a large amount of cosmetic bottle caps 26 to be filled, and the cosmetic, greatly saves the assembling time of the cosmetic bottle cap and increases the working efficiency.

Beneficially, a second circular block 33 is disposed on the mechanical arm 24 at the lower side of the two first circular blocks 27, a first motor 34 is disposed in the second circular block 33, an output shaft at the lower end of the first motor 34 is in power connection with a first lead screw 35, three positioning pillars 36 with smooth surfaces are further disposed on the second circular block 33, the three positioning pillars 36 and one first lead screw 35 are distributed on the second circular block 33 in a circumferential array, a circular ring 37 capable of sliding on the positioning pillar 36 is in threaded connection with the first lead screw 35, four first connecting rods 41 are disposed on the lower surface of the circular ring 37 in a circumferential array, four working grooves 39 with openings pointing to the center of the bottle cap placing hole 25 are distributed on the lowest end of the mechanical arm 24 in a circumferential array, a through hole 40 communicating with the outside is disposed in the working grooves 39, the first connecting rods 41 pass through the through hole 40 and enter the working grooves 39 to be in hinged connection with second connecting rods 42, the second connecting rod 42 is hinged with a screwing working block 43 capable of sliding in the working groove 39, a rotating wheel groove 45 with an opening pointing to the center of the bottle cap placing hole 25 is arranged in the screwing working block 43, a second motor 44 is arranged in the inner wall of the upper side of the rotating wheel groove 45, an output shaft at the lower end of the second motor 44 extends into the rotating wheel groove 45 and is fixedly provided with a cylindrical sleeve 47, a sponge wheel 48 is arranged on the surface of the cylindrical sleeve 47, when the cosmetic bottle cap placing device is used, the first motor 34 is started to drive the first lead screw 35 to rotate, the first lead screw 35 rotates to drive the circular ring 37 to extend along the positioning column 36 to slide downwards through thread matching, the first connecting rod 41 on the circular ring 37 drives the screwing working block 43 to move towards the center of the bottle cap placing hole 25 through the second connecting rod 42, and the four sponge wheels 48 deform to clamp the cosmetic bottle cap 26, the first motor 34 stops the second motor 44 from starting, the second motor 44 drives the sponge wheels 48 to rotate, the four sponge wheels 48 screw the cosmetic bottle cap 26 onto the cosmetic bottle body 61, and due to the fact that friction provided by the sponge wheels 48 is limited, the sponge wheels 48 can slip on the surface of the cosmetic bottle cap 26 when being screwed to a certain degree, and the phenomenon that the cosmetic bottle cap 26 or the cosmetic bottle body 61 is damaged due to too large mechanical screwing force is avoided.

Advantageously, the diameter of the second circular through hole 23 is smaller than the diameter of the first circular through hole 16, and the second circular through hole 23 is concentric with the first circular through hole 16, the upper end of the mechanical arm 24 can penetrate into the first circular through hole 16.

Beneficially, the cosmetic jig 50 comprises a jig base 62, three square grooves 51 with the same size and upward opening are arranged on the jig base 62, a convex block 60 is arranged in each square groove 51, two cosmetic fixing blocks 52 which are matched with the convex block 60 and can freely slide left and right are arranged in each square groove 51, three semicircular grooves 53 are respectively arranged in the cosmetic fixing blocks 52 on the left side and the right side, the semicircular grooves 53 are combined together to form a complete circle, a sponge pad 54 is arranged on the inner wall of each semicircular groove 53, two bearing seats 55 are further arranged on the jig base 62, a rotatable second lead screw 56 is arranged between the bearing seats 55, a rotating handle 57 is arranged at the right end of the second lead screw 56, internal threads with opposite thread rotation directions are respectively arranged in the two cosmetic fixing blocks 52 in each square groove 51, and correspondingly, the threads on the second lead screw 56 correspond to the cosmetic fixing blocks 52, therefore, the second lead screw 56 is processed in a segmented manner, so that when the second lead screw 56 rotates, the cosmetic fixing blocks 52 in the same square groove 51 always move towards or away from each other, the fixture base 62 is further provided with two shaft fixing blocks 59, a smooth rod 58 penetrating through the cosmetic fixing blocks 52 is arranged between the shaft fixing blocks 59, the cosmetic fixture 50 can prevent the cosmetic bottle body 61 from sliding on the conveyor belt device 12, the accurate positioning of the bottle body is realized, the assembly of a bottle cap is facilitated, in addition, the cosmetic fixture 50 can be applied to operations such as cosmetic filling, and the application range is wide.

When the device is used for automatically assembling the cosmetic bottle cap, firstly, an operator puts a cosmetic bottle body 61 into a position between the semicircular grooves 53, the second lead screw 56 is driven to rotate by the rotating handle 57, the second lead screw 56 drives the two cosmetic fixing blocks 52 in the same square groove 51 to move oppositely, the cosmetic bottle body 61 is firmly fixed in the cosmetic clamp 50, then the operator puts the cosmetic clamp on the conveyor belt device 12, the conveyor belt device 12 conveys the cosmetic clamp 50 to the position below the bottle cap assembling device, the identification unit identifies the position of the cosmetic bottle body 61 clamped in the cosmetic clamp 50, calculates the distance from the lower end of the mechanical arm 24 to the upper surface of the cosmetic fixing block 52, the bottle cap placing hole 25 is enabled to be over against the cosmetic bottle body 61 by controlling the extension and retraction of the hydraulic rod 19, the lower end of the mechanical arm 24 is enabled to be 5-8mm from the upper surface of the cosmetic fixing block 52 by controlling the telescopic rod 20, then, a reverse current is supplied to the coil in the electromagnet device 29 on the upper side, the magnetic trapezoidal block 30 on the upper side is accommodated in the chute 28, at the moment, the cosmetic bottle cover 26 falls down for a short distance under the action of self gravity and is caught by the magnetic trapezoidal block 30 on the lower side, then, the electromagnetic device 29 on the upper side is restored to be supplied with the forward current, the magnetic trapezoidal block 30 on the upper side is popped up again and is clamped in a gap between the upper cosmetic bottle cover 26 and the lower cosmetic bottle cover 26, the reverse current is supplied to the coil in the electromagnet device 29 on the lower side after 0.5s, the magnetic trapezoidal block 30 on the lower side is accommodated in the chute 28, the cosmetic bottle cover 26 originally positioned between the electromagnet devices 29 on the upper side and the lower side falls to the cosmetic bottle body 61 under the action of gravity, then, the first motor 34 is started to drive the first lead screw 35 to rotate, the first lead screw 35 is rotated to drive the circular ring 37 to extend to slide down the positioning column 36 through thread fit The four sponge wheels 48 deform to some extent and clamp the cosmetic bottle cap 26, the first motor 34 stops the second motor 44 to start, the second motor 44 drives the sponge wheels 48 to rotate, the cosmetic bottle cap 26 is screwed on the cosmetic bottle body 61 through the four sponge wheels 48 to complete the assembly of one cosmetic bottle cap, then the telescopic rod 20 retracts to recover the initial position, and the automatic assembly of the cosmetic bottle cap can be achieved by repeating the operation.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A bottle lid assembly line which characterized in that: the cosmetic bottle cap assembling device comprises bases which are arranged on two sides of the conveyor belt in a bilateral symmetry mode, support columns are fixedly connected to the bases, cantilever beams are connected between the support columns on the left side and the right side, square holes which penetrate through the cantilever beams up and down are formed in the cantilever beams, limiting clamp blocks are symmetrically arranged on the inner walls of the front side and the rear side of each square hole, working blocks which are matched with the limiting clamp blocks and can freely slide in the square holes left and right are arranged in the square holes, first connecting blocks are symmetrically arranged on the upper surfaces of the working blocks in the bilateral symmetry mode, second connecting blocks are symmetrically arranged on the upper surfaces of the cantilever beams in the bilateral symmetry mode, the first connecting blocks are connected with the second connecting blocks through hydraulic rods, and first circular through holes which penetrate through the working blocks up and down are formed in the working blocks, the working block is internally provided with four telescopic rods which are distributed in a circumferential array by taking the circle center of the first circular through hole as the center, and the lower ends of the telescopic rods are provided with bottle cap screwing devices.

2. The assembly line of caps according to claim 1, wherein the apparatus is assembled by: the cosmetic bottle comprises a cosmetic bottle body and a cosmetic bottle cover, and in addition, the device is matched with an identification unit for judging whether the cosmetic clamp clamps the cosmetic bottle body and identifying the position of the cosmetic bottle body.

3. The bottle cap assembly line according to claim 1, wherein the bottle cap screwing device comprises a connecting table, the lower end of the telescopic rod penetrates through the connecting table to be provided with a threaded connecting block, a second circular through hole which penetrates up and down is arranged in the connecting table, a mechanical arm is fixedly connected to the inner wall of the second circular through hole, a bottle cap placing hole which penetrates up and down is arranged in the mechanical arm, the bottle cap placing hole is circular, two first circular ring blocks are arranged on the mechanical arm, electromagnetic devices are arranged in the first circular ring blocks on the upper side and the lower side, the electromagnetic devices comprise four sliding grooves which are distributed in the inner wall of the bottle cap placing hole in a circumferential array mode and are communicated with the bottle cap placing hole, a slidable magnetic trapezoidal block is arranged in each sliding groove, a limiting groove is arranged in the inner wall on the upper side of each sliding groove, and a limiting block which extends into, the inner wall of the sliding chute is internally provided with an electromagnet device which can be composed of block iron and winding coils, and the electromagnet device is characterized in that four coils in the electromagnet device on the upper side are connected in series, four coils in the electromagnet device on the lower side are also connected in series, but the coils on the upper side and the lower side are not connected, an independent control mode is adopted, the magnetic pole direction of the electromagnet device can be controlled by controlling the current direction in the coils, and the magnetic trapezoidal block can be controlled to pop out or take in the sliding chute by utilizing the principle that like poles repel each other due to opposite poles attract each other.

4. The bottle cap assembly line according to claim 3, wherein the robot arm is provided with a second ring block at a position below two of the first ring blocks, the second ring block is provided with a first motor, a lower end output shaft of the first motor is connected with a first lead screw in a power mode, the second ring block is further provided with three positioning columns with smooth surfaces, the three positioning columns and one first lead screw are distributed on the second ring block in a circumferential array mode, the first lead screw is connected with a ring capable of sliding on the positioning columns in a threaded mode, the lower surface of the ring is provided with four first connecting rods in a circumferential array mode, four working grooves with openings pointing to the centers of the bottle cap placing holes are distributed in a circumferential array mode at the lowest end position of the robot arm, through holes communicated with the outside are formed in the working grooves, the first connecting rods penetrate through the through holes to enter the working grooves, and are connected with the second connecting rods in a hinged mode, the second connecting rod is hinged to a screwing working block which can slide in the working groove, a rotating wheel groove with an opening pointing to the circle center of the bottle cap placing hole is formed in the screwing working block, a second motor is arranged in the inner wall of the upper side of the rotating wheel groove, an output shaft at the lower end of the second motor extends into the rotating wheel groove, a cylindrical sleeve is fixedly arranged in the rotating wheel groove, and a sponge wheel is arranged on the surface of the cylindrical sleeve.

5. The assembly line of claim 3, wherein the second circular through hole has a smaller diameter than the first circular through hole, and wherein the second circular through hole is concentric with the first circular through hole, and wherein the upper end of the robot arm is capable of passing into the first circular through hole.

6. The bottle cap assembly line according to claim 1, wherein the cosmetic holder comprises a holder base, the holder base has three square grooves with the same size and opening upward, the square grooves have protrusions, the square grooves have two cosmetic fixing blocks matching with the protrusions and capable of sliding freely left and right, the cosmetic fixing blocks on the left and right sides have three semicircular grooves, the semicircular grooves are combined to form a complete circle, the inner walls of the semicircular grooves have sponge pads, the holder base has two bearing seats, a rotatable second lead screw is arranged between the bearing seats, a rotating handle is arranged at the right end of the second lead screw, the two cosmetic fixing blocks in the square grooves have internal threads with opposite screw directions, and correspondingly, the threads on the second lead screw correspond to the cosmetic fixing blocks, therefore, the second lead screw adopts a sectional processing mode, so that when the second lead screw rotates, the cosmetic fixing blocks in the same square groove always move in the opposite direction or move in the opposite direction, the clamp base is further provided with two shaft fixing blocks, and a smooth rod penetrating through the cosmetic fixing blocks is arranged between the shaft fixing blocks.