CN111634869A

CN111634869A - Servo rotary cap screwing machine

Info

Publication number: CN111634869A
Application number: CN202010626230.4A
Authority: CN
Inventors: 薛永祥
Original assignee: Jiangsu Tom Intelligent Equipment Co ltd
Current assignee: Jiangsu Tom Intelligent Equipment Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2020-09-08

Abstract

The invention provides a servo rotary cap screwing machine which comprises a servo cap screwing mechanism, a bottle conveying mechanism and a cap conveying mechanism, wherein the servo cap screwing mechanism comprises a pneumatic control part, an electric control part and a mechanical execution part, the mechanical execution part is provided with a cap screwing head, the electric control part controls the cap screwing head to lift and/or rotate relative to the mechanical execution part, the pneumatic control part controls the cap screwing head to open and close, the cap conveying mechanism is used for conveying bottle caps to the cap screwing head, and the bottle conveying mechanism is used for conveying bottles to the lower part of the cap screwing head and conveying the capped bottles away. The cap screwing head can be lifted and/or rotated independently, and the servo cap screwing mechanism and the cap conveying mechanism do not need to be lifted integrally, so that the structure of the whole machine is simpler, and the load of a mechanical execution part is reduced.

Description

Servo rotary cap screwing machine

Technical Field

The invention relates to the technical field of automatic packaging, in particular to a full-servo rotary cap screwing machine.

Background

In the automatic packaging process of bottle products, cap closing is carried out by using a cap screwing machine under most conditions, the cap closing machine in the market is mainly a linear cap twisting machine or a rotary cap screwing machine, the rotary cap screwing machine comprises a cap screwing mechanism, a bottle conveying mechanism and a cap conveying mechanism, the bottle conveying mechanism and the cap conveying mechanism are arranged below the cap screwing mechanism, the cap screwing mechanism comprises a cap screwing head and a driving mechanism for driving the cap screwing head to rotate and lift, but the cap screwing head cannot lift independently in the existing rotary cap screwing machine, but other parts of the cap screwing mechanism except the driving mechanism for driving the cap screwing head to lift rotate as a whole, the structure is complex, and the load of the lifting driving mechanism is increased; and all the cap screwing heads must be lifted and lowered simultaneously, so that the bottle cap screwing machine starts to work after all the bottles are opposite to the cap screwing heads one by one, and the working efficiency is low.

Disclosure of Invention

Accordingly, there is a need for a servo rotary capping machine with a simple structure and high efficiency.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a servo rotation type spiral cover machine, includes servo spiral cover mechanism, send bottle mechanism and send the lid mechanism, servo spiral cover mechanism includes pneumatic control portion, electrical control portion, mechanical execution portion is provided with the spiral cover head, electrical control portion control the spiral cover head for mechanical execution portion goes up and down and/or rotates, pneumatic control portion control the spiral cover head opens and shuts, send the lid mechanism to be used for transporting the bottle lid the spiral cover head, send bottle mechanism to be used for transporting the bottle transport the bottle behind the spiral cover head below and the spiral cover is transported away.

Further, servo spiral cover mechanism still includes ball spline lead screw, drive the rotatory rotating electrical machines of ball spline lead screw and drive the elevator motor that ball spline lead screw goes up and down, ball spline lead screw is hollow structure, the spiral cover head sets up the bottom of ball spline lead screw, the top of ball spline lead screw with pneumatic control portion connects.

Furthermore, the lifting motor is used for controlling the lifting of the ball spline screw rod, the lifting motor is connected with the ball spline screw rod through a first belt pulley assembly, a driving wheel of the first belt pulley assembly is connected with a main shaft of the lifting motor, the ball spline screw rod penetrates through a driven wheel of the first belt pulley assembly, and the driven wheel of the first belt pulley assembly is provided with an internal thread matched with the ball spline screw rod.

Furthermore, the rotating motor is used for controlling the rotation of the ball spline screw rod, the rotating motor is connected with the ball spline screw rod through a second belt pulley assembly, a driving wheel of the second belt pulley assembly is connected with a main shaft of the rotating motor, the ball spline screw rod penetrates through a driven wheel of the first belt pulley assembly, an axial key groove is formed in the surface of the ball spline screw rod, and a spline matched with the key groove is arranged on the first belt pulley assembly.

Further, the lifting motor and the rotating motor are both servo motors.

Furthermore, the servo rotary cap screwing machine also comprises a control system; the control system comprises a PLC controller; and the pneumatic control part and the electric control part are electrically connected with the PLC.

Further, the pneumatic control part comprises a pneumatic electromagnetic valve electrically connected with the PLC; the pneumatic electromagnetic valve is arranged on an air supply pipeline of the screw cap head.

Furthermore, the electric control part comprises a lifting servo controller, a motor encoder, a rotating servo controller and a torque acquisition module which are electrically connected with the PLC; the lifting servo controller controls the lifting motor to work; the motor encoder monitors the rotation angle of the lifting motor; the rotary servo controller controls the rotary motor to work; the torque acquisition module acquires the output torque of the rotating motor.

Further, the control system also comprises a control panel electrically connected with the PLC.

Further, servo rotation type spiral cover machine sets up the multiunit mechanical execution portion, the multiunit the spiral cover head axis isogonism of mechanical execution portion distributes in same circumference, each group mechanical execution portion corresponds and sets up a set of electrical control portion and a set of pneumatic control portion, spiral cover mechanism still includes the mounting panel, pneumatic control portion electrical control portion with mechanical execution portion all sets up on the mounting panel.

Furthermore, servo rotation type spiral cover machine is still including being used for the drive send bottle mechanism with send the actuating mechanism of lid mechanism, send bottle mechanism including advancing the bottle screw rod, advancing bottle star gear, spiral cover station and play bottle star gear, actuating mechanism synchronous drive advance the bottle star gear the spiral cover station with go out the bottle star gear, the bottle passes through advance the bottle screw rod and get into advance the bottle star gear, reentrant the spiral cover station, the spiral cover station is located the below of spiral cover head, the spiral cover work is in the spiral cover station is accomplished, it takes out to go out the bottle that the bottle star wheel dish will have finished the lid soon.

Further, the cap conveying mechanism comprises a supporting cover plate, a scraping cover plate and a cap conveying runway, the bottle caps on the cap conveying runway are conveyed to the position, corresponding to the cap screwing station, on the supporting cover plate by the scraping cover plate, and the cap screwing head is controlled by the pneumatic control part to grab the bottle caps.

Furthermore, the mounting plate and the cap screwing station are coaxially arranged, and the mounting plate and the cap screwing station are fixed on the same rotating shaft.

The invention has the beneficial effects that: (1) the cap screwing head can be lifted and/or rotated independently, and the servo cap screwing mechanism and the cap conveying mechanism do not need to be lifted integrally, so that the structure of the whole machine is simpler, and the load of a mechanical execution part is reduced.

(2) The servo cap screwing mechanism and the cap screwing station rotate together, each cap screwing head corresponds to one bottle, each cap screwing head can work independently due to the fact that each mechanical execution part corresponds to one electric control part and one pneumatic control part, and the bottle screwing mechanism does not need to wait for all bottles to work synchronously after being in place, and production efficiency is improved.

(3) The invention adopts the ball spline screw as the main shaft of the cap screwing head, and the ball spline screw is a lifting shaft and a rotating shaft, so that the mechanical execution part has the functions of lifting and rotating.

(4) According to the invention, the ball spline screw rod is used as a lifting shaft, bottles with different heights do not need to adjust the cap feeding height and the main machine height, each cap screwing head realizes the movement in the form of a circular cam in the whole circumference, the movement track of the cam can be changed according to the difference between the cap and the bottle, errors possibly generated during adjustment are avoided, the equipment operation is more stable, the time for changing a mold is saved, the tooth mouth of the bottle cap is not easy to damage, and the product universality is greatly improved compared with a mechanical cam.

(5) The rotary motor adopts the servo motor, and the electric control part is provided with the torque force acquisition module, so that the output torque force of the rotary motor can be monitored, the torque force of the servo motor can be adjusted so as to adjust the torque force of the rotary cover, and data can be recorded in real time so as to facilitate the tracking of the product quality at the later stage; the number of cap screwing turns can be adjusted when the number of thread turns is different, the condition that more or less cap screwing is not performed in the cap screwing process is ensured, and the cap screwing quality is improved.

(6) The invention adopts the PLC controller to realize parametric control, and the PLC controller automatically adjusts products with different specifications through calculation processing as long as the product parameters are input, thereby saving labor cost, preventing manual misoperation, having no human intervention in the whole process, and being stable and reliable.

(7) Each cap screwing head is controlled by the corresponding electric control part and the corresponding pneumatic control part, and can stop working when the cap screwing is not needed, so that the energy consumption is reduced.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of a servo cap screwing mechanism according to the present invention;

FIG. 3 is a schematic perspective view of the bottle and cap feeding mechanisms of the present invention;

FIG. 4 is a graph of position during movement of the capping head;

fig. 5 is a schematic block diagram of the present invention.

The names and the numbers of the parts in the figure are respectively as follows:

100. the bottle cap screwing device comprises a servo cap screwing mechanism, 110, a mechanical execution part, 111, a cap screwing head, 112, a lifting motor, 113, a first belt pulley assembly, 114, a rotating motor, 115, a second belt pulley assembly, 116, a ball spline screw rod, 120, an electrical control part, 121, a lifting servo controller, 122, a motor encoder, 123, a rotating servo controller, 124, a torque acquisition module, 130, a pneumatic control part, 131, a pneumatic solenoid valve, 140, a mounting plate, 210, a driving mechanism, 220, a bottle feeding mechanism, 221, a bottle feeding screw rod, 222, a bottle feeding star wheel, 223, a cap screwing station, 224, a bottle discharging star wheel, 230, a cap feeding mechanism, 231, a cap feeding runway, 232, a supporting cover plate, 233, a scraping cover plate, 300, a control system and 301, and a control panel.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1, the present invention provides a full servo rotary cap screwing machine, which comprises a servo cap screwing mechanism 100, a bottle feeding mechanism 220, a cap feeding mechanism 230, and a driving mechanism for driving the bottle feeding mechanism 220 and the cap feeding mechanism 230. The servo cap screwing mechanism 100 is arranged above the bottle feeding mechanism 220, the bottle feeding mechanism 220 is used for conveying a bottle to be capped to the lower part of the servo cap screwing mechanism 100 and conveying the capped bottle to the next station, and the servo cap screwing mechanism 100 controls the servo motor to work through a driver to drive the actuating element to move.

As shown in fig. 2, the servo capping mechanism 100 includes a pneumatic control unit 130, an electrical control unit 120, and a mechanical execution unit 110, wherein the mechanical execution unit 110 is provided with a capping head 111, the electrical control unit 120 controls the mechanical execution unit 110 to move up and down and/or rotate, so as to realize the movement up and down and/or rotation of the mechanical capping head 111, the pneumatic control unit 130 controls the capping head 111 to open and close, and the pneumatic control unit 130 and the electrical control unit 120 cooperate with each other to control the capping head 111 to cap.

The mechanical execution part 110 further comprises a rotating motor 114, a lifting motor 112 and a mounting plate 140, wherein the rotating motor 114 and the lifting motor 112 are arranged on the mounting plate 140, the lifting motor 112 and the rotating motor 114 both adopt servo motors, a main shaft of the cap screwing head 111 is a ball spline screw 116, and the cap screwing head 111 is arranged at the lower end of the ball spline screw 116. The external portion of the ball spline screw 116 is provided with a thread and a keyway (not shown) is axially formed, the lifting motor 112 drives the ball spline screw 116 to lift through the first pulley assembly 113, the driving wheel of the first pulley assembly 113 is connected with the main shaft of the lifting motor 112, the ball spline screw 116 passes through the driven wheel of the first pulley assembly 113, and the driven wheel of the first pulley assembly 113 is provided with an internal thread matched with the ball spline screw 116, when the lifting motor 112 is started, the lifting motor 112 drives the driving wheel and the driven wheel of the first pulley assembly 113 to rotate, and the ball spline screw 116 in threaded fit with the driven wheel of the first pulley assembly 113 rises or falls. The rotating motor 114 drives the ball spline screw 116 to rotate through the second pulley assembly 115, a driving wheel of the second pulley assembly 115 is connected with a main shaft of the rotating motor 114, the ball spline screw 116 passes through a driven wheel of the second pulley assembly 115, and a spline matched with a key groove of the ball spline screw 116 is arranged on the driven wheel of the second pulley assembly 115, so that when the rotating motor 114 drives the second pulley assembly 115 to operate, the ball spline screw 116 rotates along with the second pulley assembly 115. In the present embodiment, the first pulley assembly 113 is disposed above the second pulley assembly 115, and when the servo cap screwing mechanism 100 of the present invention works, the rotating motor 114 is first started to drive the lower portion of the ball spline screw 116 to rotate, and then drives the lifting motor 112 to work, so that the servo cap screwing mechanism 100 performs cap screwing in the process of uniform rotation.

In other embodiments, the lift motor 112 and the ball spline screw 116 may be replaced with a linear motor, but the linear motor is relatively expensive.

The mounting plate 140 is circular, and a through hole for the ball spline screw 116 to pass through is formed in the mounting plate 140. In the embodiment, a plurality of groups of mechanical executing parts 110 are arranged, the ball spline screws of the mechanical executing parts 110 are arranged on the mounting plate 140 at equal angles, each group of mechanical executing parts 110 is correspondingly provided with a group of electric control parts 120 and a group of pneumatic control parts 130, each cap screwing head 111 can work independently, synchronous work is not needed to be started after all bottles are in place, and the production efficiency is improved.

As shown in fig. 5, the servo rotary cap screwing machine of the present embodiment further includes a control system 300; the control system 300 includes a PLC controller 301, and a control panel 302 electrically connected to the PLC controller 301. The pneumatic control part and the electric control part are both electrically connected with the PLC 301. The pneumatic control part comprises a pneumatic electromagnetic valve electrically connected with the PLC; the pneumatic electromagnetic valve is arranged on an air supply pipeline of the screw cap head. The electric control part comprises a lifting servo controller, a motor encoder, a rotating servo controller and a torque acquisition module which are electrically connected with the PLC; the lifting servo controller controls the lifting motor to work; the motor encoder monitors the rotation angle of the lifting motor; the rotary servo controller controls the rotary motor to work; the torque acquisition module acquires the output torque of the rotating motor.

For products with different specifications, as long as product parameters are input, the PLC 301 automatically controls the lifting motor 112 and the rotating motor 114 to work through calculation, so that parametric control is realized, the number of cap screwing turns can be adjusted when the number of thread turns is different, and the condition of more or less cap screwing is ensured not to occur in the cap screwing process. When the bottle caps with different tooth pitches are screwed, the speed of the cap screwing head 111 can be controlled to descend, the falling stroke is controlled, the tooth mouths of the bottle caps are not easy to damage, and the universality is high.

The working principle of the invention is as follows: the specification is selected through the control panel 302, product information is input, the PLC controller 301 controls the rotary motor to work through the rotary servo controller 123 according to the input information, the torque acquisition module 124 acquires torque information of the rotary motor 114 and feeds the torque information back to the PLC controller 301, the PLC controller 301 calculates the rotation angle of the capping head 111, meanwhile, the lifting servo controller 121 controls the lifting motor 112 to work, the motor encoder 122 monitors the rotation angle of the lifting motor 112 and feeds the rotation angle back to the controller 301, and the PLC controller 301 calculates the lifting distance of the capping head 111; the PLC controller 301 controls the cap-grasping cylinder of the capping head 111 to operate through the pneumatic solenoid valve 131, thereby controlling the capping head 111 to grasp the cap.

The lifting motor 112 drives the ball spline screw 116 to move up and down axially through the first pulley assembly 113 and can simulate cam movement, as shown in fig. 4, the servo cap screwing mechanism 100 starts to ascend from the position 1 to the position 2, the cap screwing head 111 is opened and stops rotating in the process, the PLC detects and judges the position at the position 2-3, the cap screwing head 111 descends at the position 3-4 to be ready to grab the cap, the cap is grabbed at the position 4, the cap screwing head 111 at the position 4-5 grabs the cap onto the bottle opening of the cap screwing station 223, the cap screwing head 111 rotates and descends at the position 5-6 to start screwing, the cap screwing theoretical height at the position 6-1 is in place, and the PLC system judges whether the torque force meets the requirement and records data. In the process, the descending height and the ascending height and the rotating speed can be realized by adjusting the rotating speed of the motor through the PLC. The different descending speeds of the bottle caps with different tooth pitches avoid the possibility of hard pressing or lifting the bottle. The lifting motor 112 has a braking function, so that the screwing head 111 cannot fall to the lowest point after power failure, and if the moving belt is broken and the lifting motor 112 is in no load, the lifting motor can be stopped immediately when the detected torque force is 0. The rotating motor 114 drives the spline screw rod 116 to rotate through the second belt wheel assembly 115, the cap screwing is started when the cap screwing head 111 reaches the cap screwing station 223, the cap screwing speed is adjustable, the cap can be screwed at the same position under the condition that the number of turns is different, and the quality is guaranteed. Meanwhile, when the cap screwing is not needed, the cap screwing head 111 does not rotate, and the energy consumption is reduced.

As shown in fig. 3, the bottle feeding mechanism 220 includes a bottle feeding screw 221, a bottle feeding star wheel 222, a cap screwing station 223 and a bottle discharging star wheel 224, and the cap feeding mechanism 230 includes a cap supporting plate 232, a cap scraping plate 233 and a cap feeding runway 231. The bottles enter the bottle inlet star wheel 222 through the bottle inlet screw rod 221 and then enter the cap screwing station 223, the bottle caps on the cap conveying runway 231 are conveyed to the positions, corresponding to the cap screwing station 223, on the supporting cover plate 232 by the cover scraping plate 233, the cap screwing head 111 is controlled by the pneumatic control portion 130 to grasp the bottle caps to screw the caps at the cap screwing station 223, and the capped bottles are taken out through the bottle outlet star wheel 224.

The outlet pitch of the bottle feeding screw 221 is equal to the indexing circumference/equal number of the bottle feeding star wheel, a bottle to be capped is arranged between every two adjacent threads, and the bottles positioned between the two threads are conveyed to the bottle feeding star wheel 222 when the bottle feeding screw 221 rotates. The bottle feeding screw 221 can ensure that the distance between the bottles is equal while conveying the bottles to the bottle feeding star wheel 222, so that the bottles are equiangularly arranged on the bottle feeding star wheel 222 and can be in one-to-one correspondence with the cap screwing heads 111.

The driving mechanism 210 is used for synchronously driving the bottle feeding star wheel 222, the cap screwing station 223 and the bottle discharging star wheel 224, the cap screwing station 223 is coaxially arranged with the mounting plate 140, a main shaft of the cap screwing mechanism 100 is connected with the cap screwing station 223, the servo cap screwing mechanism 100 can synchronously rotate with the cap screwing station 223, each cap screwing head 111 can independently work without waiting for all bottles to be in place and then start to synchronously work, and the production efficiency is improved. The cover supporting plate 232 is arranged between the cap screwing station 223 and the cap screwing head 111, and the cover supporting plate 232 and the bottle discharging star wheel 224 are driven by the same driving shaft of the driving device.

The full-servo cap screwing machine adopts the ball spline screw 116 as the main shaft of the cap screwing head 111, the ball spline screw 116 is a lifting shaft and a rotating shaft, the structure is simple, the ball spline screw 116 drives the cap screwing head 111 to lift relative to the main body of the servo cap screwing mechanism 100, and the main body of the servo cap screwing mechanism 100 does not lift; rotating electrical machines 114 and elevator motor 112 all adopt servo motor, thereby the spiral cover torsion is adjusted to adjustable servo motor's moment of torsion, can adjust the spiral cover number of turns when the tooth line number of turns differs, guarantee not appear at the spiral cover in-process and revolve the condition many times or revolve less, the speed control descending stroke that steerable spiral cover head 111 descends when revolving the bottle lid of different tooth distances, not fragile bottle lid's tooth mouth, the commonality is strong.

In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a servo rotation type spiral cover machine which characterized in that: including servo spiral cover mechanism, send bottle mechanism and send lid mechanism, servo spiral cover mechanism includes pneumatic control portion, electrical control portion, mechanical execution portion is provided with the spiral cover head, electrical control portion control the spiral cover head for electrical control portion and pneumatic control portion goes up and down and/or rotate, pneumatic control portion control the spiral cover head opens and shuts, send lid mechanism to be used for transporting the bottle lid the spiral cover head, send bottle mechanism to be used for transporting the bottle transport the bottle behind the spiral cover head below and will revolve the lid is transported away.

2. The servo rotary capping machine of claim 1, wherein: servo spiral cover mechanism still includes ball spline lead screw, drive the rotatory rotating electrical machines of ball spline lead screw and drive the elevator motor that ball spline lead screw goes up and down, ball spline lead screw is hollow structure, the spiral cover head sets up the bottom of ball spline lead screw, the top of ball spline lead screw with pneumatic control portion connects.

3. The servo rotary capping machine of claim 2, wherein: the lifting motor is used for controlling the lifting of the ball spline screw rod, the lifting motor is connected with the ball spline screw rod through a first belt pulley assembly, a driving wheel of the first belt pulley assembly is connected with a main shaft of the lifting motor, the ball spline screw rod penetrates through a driven wheel of the first belt pulley assembly, and the driven wheel of the first belt pulley assembly is provided with an internal thread matched with the ball spline screw rod.

4. A servo rotary capping machine according to claim 3 wherein: the rotary motor is used for controlling the rotation of the ball spline screw rod, the rotary motor is connected with the ball spline screw rod through a second belt wheel assembly, a driving wheel of the second belt wheel assembly is connected with a main shaft of the rotary motor, the ball spline screw rod penetrates through a driven wheel of the first belt wheel assembly, an axial key groove is formed in the surface of the ball spline screw rod, and a spline matched with the key groove is arranged on the first belt wheel assembly.

5. The servo rotary capping machine of claim 1, wherein: the lifting motor and the rotating motor are both servo motors.

6. The servo rotary capping machine of claim 5, wherein: the system also comprises a control system; the control system comprises a PLC controller; and the pneumatic control part and the electric control part are electrically connected with the PLC.

7. The servo rotary capping machine of claim 1, wherein: servo rotation type spiral cover machine sets up the multiunit mechanical execution portion, the multiunit the spiral cover head axis isogonism of mechanical execution portion distributes in same circumference, each group mechanical execution portion corresponds and sets up a set of electrical control portion and a set of pneumatic control portion, spiral cover mechanism still includes the mounting panel, pneumatic control portion electrical control portion with mechanical execution portion all sets up on the mounting panel.

8. The servo rotary capping machine of claim 7, wherein: still including being used for the drive send bottle mechanism with send actuating mechanism of lid mechanism, send bottle mechanism including advancing the bottle screw rod, advancing bottle star gear, spiral cover station and go out the bottle star gear, actuating mechanism synchronous drive advance the bottle star gear the spiral cover station with go out the bottle star gear, the bottle passes through advance the bottle screw rod and get into advance the bottle star gear, reentrant the spiral cover station, the spiral cover station is located the below of spiral cover head, the spiral cover work is in the spiral cover station is accomplished, it takes out the bottle that has finished the lid soon to go out the bottle star wheel dish.

9. The servo rotary capping machine of claim 8, wherein: the cap conveying mechanism comprises a supporting cover plate, a scraping cover plate and a cap conveying runway, the bottle caps on the cap conveying runway are conveyed to the position, corresponding to the cap screwing station, on the supporting cover plate by the scraping cover plate, and the cap screwing head is controlled by the pneumatic control part to grab the bottle caps.

10. The servo rotary capping machine of claim 8, wherein: the mounting panel with the coaxial setting of spiral cover station, the mounting panel with the spiral cover station is fixed in same pivot.