Assembly mechanism of stand-up pouch nozzle production line

Abstract

An assembly mechanism for a stand-up pouch nozzle production line includes a frame and a turntable nozzle carrying device mounted on the frame. The turntable nozzle carrying device has an intermittently rotating turntable with multiple positioning rods on its edge for positioning the nozzles. The sealing cap installation mechanism further includes a vibrating plate, a sealing cap sequential positioning device, an arc-shaped positioning device, a cap-pushing and slotting device, and a sealing cap synchronous gripping and releasing device. The advantages of this invention compared to existing technologies are that, by using the sealing cap sequential positioning device to receive a predetermined number of sealing caps and transfer them to the turntable, using the cap-pushing and slotting device to push the predetermined number of sealing caps into the positioning slots of the arc-shaped positioning device, and using the sealing cap synchronous gripping and releasing device to synchronously grip these sealing caps and fit them onto the nozzles on the multiple positioning rods on the turntable edge and tighten them, the gripping, releasing, and tightening of a predetermined number of sealing caps can be completed quickly.

Description

Technical Field

[0001] This invention relates to an assembly mechanism for a stand-up pouch nozzle production line. Background Technology

[0002] Therefore, the method of placing the sealing cap onto the nozzle needs to be improved to avoid collisions during placement. However, if a general-purpose robotic arm is used to mimic the human action of grasping the sealing cap and placing it onto the nozzle (referred to as the cap-grabbing and cap-screwing action), not only is the efficiency low, but the equipment cost is also high. Therefore, it is necessary to design specialized equipment to complete the cap-grabbing, cap-screwing, and cap-screwing actions. Summary of the Invention

[0003] The purpose of this invention is to provide an assembly mechanism for a stand-up pouch nozzle production line, which can quickly complete the processes of gripping, placing, and screwing on a predetermined number of sealing caps. The technical solution adopted is as follows:

[0004] An assembly mechanism for a stand-up pouch nozzle production line includes a frame and a rotary nozzle carrying device mounted on the frame. The rotary nozzle carrying device has an intermittently rotating turntable with multiple positioning rods on its edge for positioning the nozzles. The assembly mechanism also includes a sealing cap mounting mechanism, characterized in that: the sealing cap mounting mechanism includes...

[0005] The vibratory feeder sequentially delivers the sealing covers through a conveyor channel;

[0006] The sealing cap sequential positioning device receives a predetermined number of sealing caps in sequence and then horizontally transfers the predetermined number of sealing caps to the front of the turntable.

[0007] An arc-shaped positioning device has multiple positioning grooves that can receive a predetermined number of sealing caps and arrange them in an arc shape;

[0008] The push-cap insertion device pushes a predetermined number of sealing caps located in the sealing cap sequence positioning device into the positioning groove of the arc-shaped positioning device.

[0009] The sealing cap synchronous gripping and releasing device synchronously grips all the sealing caps located in the positioning slots of the arc-shaped positioning device, lifts them up and moves them to the edge of the turntable above a predetermined number of positioning rods, each equipped with a nozzle. These sealing caps are then placed downwards onto the nozzles located below and tightened.

[0010] In a preferred embodiment, the sealing cap sequential positioning device includes a base, a first reciprocating motion mechanism, a sliding frame, multiple vertical telescopic components, and multiple cap hanging rods. The base is mounted on a frame, the first reciprocating motion mechanism is mounted on the base, the sliding frame is mounted on the first reciprocating motion mechanism, the sliding frame has a top panel, and each vertical telescopic component is mounted on the bottom surface of the top panel of the sliding frame. Each vertical telescopic component has an upwardly extending actuating end. The number of cap hanging rods is the same as the number of vertical telescopic components and they correspond one-to-one. Each cap hanging rod is mounted on the actuating end of the corresponding vertical telescopic component and can extend from bottom to top through the top panel to the top of the top panel.

[0011] A better solution is that the first reciprocating motion mechanism is a first cylinder, and the sliding frame is mounted on the piston shaft of the first cylinder. The trajectory of the sliding frame driven by the first cylinder passes through the outlet of the conveying channel.

[0012] In a preferred embodiment, the area of ​​the turntable near the arc-shaped positioning device is provided with a sealing cap installation station. The arc-shaped positioning device includes a positioning platform mounted on the frame and positioned in front of the turntable, and an arc-shaped groove plate mounted on the positioning platform. The arc-shaped groove plate has multiple positioning grooves, each extending from its rear opening towards the turntable, and the front ends of all positioning grooves form a first arc. This first arc is identical to a second arc formed by multiple positioning rods on the turntable at the sealing cap installation station, and the first and second arcs are parallel to each other. Because the first and second arcs are identical and parallel, after the sealing cap synchronous gripping device grasps the multiple sealing caps and moves them above these positioning rods, they can be accurately fitted downwards onto the nozzles located on these positioning rods.

[0013] In a preferred embodiment, the cover-pushing device includes a second reciprocating motion mechanism and a cover-pushing plate. The second reciprocating motion mechanism is mounted on a base, and the cover-pushing plate is mounted on the second reciprocating motion mechanism. The path of the cover-pushing plate driven by the second reciprocating motion mechanism passes above the arc-shaped positioning device.

[0014] A better embodiment includes a sealing cover limiting plate installed at the top of the push cover plate. The function of the sealing cover limiting plate is to prevent the sealing cover from slipping out of the positioning slots during the pushing process.

[0015] A better solution is that the second reciprocating motion mechanism is a second cylinder, and the push cover plate is mounted on the piston shaft of the second cylinder.

[0016] In a preferred embodiment, the sealing cap synchronous gripping and releasing device includes a support frame, a drive component, a swing frame, and multiple cap tightening units. The support frame is mounted on a machine frame, the swing frame is mounted on the support frame, the drive component is mounted on the support frame and connected to the swing frame, driving the swing frame to swing. All cap tightening units are respectively mounted on the swing frame. The swing frame reciprocates between above the arc-shaped groove plate and above multiple positioning rods located at the sealing cap installation position, such that when the swing frame moves each cap tightening unit above the arc-shaped groove plate, each cap tightening unit grips the sealing cap located at the front end of each positioning groove. When the swing frame moves each cap tightening unit above the multiple positioning rods located at the sealing cap installation position, each cap tightening unit puts the gripped sealing cap onto the nozzle located on each positioning rod and tightens it.

[0017] A better solution is to use a servo motor as the driving component.

[0018] The advantages of this invention compared to the prior art are that, since a sealing cap sequential positioning device is used to receive a predetermined number of sealing caps and transfer them to the front of the turntable, a sealing cap pushing device is used to push the predetermined number of sealing caps into the positioning slot of the arc-shaped positioning device, and a sealing cap synchronous gripping and releasing device is used to synchronously grip these sealing caps and put them onto the nozzles of multiple positioning rods on the edge of the turntable and tighten them, the gripping, releasing, and tightening of a predetermined number of sealing caps can be completed quickly. Attached Figure Description

[0019] Figure 1 This is a top view of an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 The illustrated embodiment is a 3D view after the vibratory feeder has been removed.

[0021] Figure 3 yes Figure 2 A 3D view after removing the rotary nozzle carrying device;

[0022] Figure 4 yes Figure 3 The front view;

[0023] Figure 5 yes Figure 3 Another perspective illustration;

[0024] Figure 6 yes Figure 3 A schematic diagram of the sealing cap sequential positioning device, the arc positioning device, and the push-cap insertion device;

[0025] Figure 7 yes Figure 6 The front view;

[0026] Figure 8 yes Figure 6 A schematic diagram of the push-open cover;

[0027] Figure 9 yes Figure 6 Schematic diagram of the synchronous gripping and releasing device for the sealing cap;

[0028] Figure 10 yes Figure 9 A schematic diagram showing the swing frame with the suspension beam removed;

[0029] Figure 11 yes Figure 1 The circuit block diagram of the embodiment shown is shown. Detailed Implementation

[0030] like Figure 1-11 As shown, in one embodiment of this application, the assembly mechanism of the stand-up pouch nozzle production line includes a frame 1 and a turntable nozzle carrying device 2 mounted on the frame 1. The turntable nozzle carrying device 2 has an intermittently rotating turntable 201, and the edge of the turntable 201 is provided with a plurality of positioning rods 202 for positioning the nozzles. The assembly mechanism also includes a sealing cap mounting mechanism, which includes...

[0031] Vibratory plate 3 sequentially delivers sealing covers through a conveying channel 301;

[0032] The sealing cap sequential positioning device 4 receives a predetermined number of sealing caps in sequence and then horizontally transfers the predetermined number of sealing caps to the front of the turntable 201.

[0033] The arc-shaped positioning device 5 has multiple positioning grooves 501 that can receive a predetermined number of sealing caps and arrange them in an arc shape;

[0034] The push-cap insertion device 6 pushes a predetermined number of sealing caps located in the sealing cap sequence positioning device 4 into the positioning groove 501 of the arc-shaped positioning device 5.

[0035] The sealing cap synchronous gripping and releasing device 7 synchronously grips and lifts all the sealing caps located in the positioning grooves 501 of the arc-shaped positioning device 5 and moves them to the edge of the turntable 201 above a predetermined number of positioning rods 202, each with a nozzle attached. The sealing caps are then placed downwards onto the nozzles located below and tightened.

[0036] like Figure 1-11 As shown, one optional embodiment of this application has a predetermined quantity of 4.

[0037] like Figure 6 , 7As shown, in one optional embodiment of this application, the sealing cap sequential positioning device 4 includes a base 401, a first reciprocating motion mechanism 402, a sliding frame 403, multiple vertical telescopic members 404, and multiple cap hanging rods 405. The base 401 is mounted on the frame 1, the first reciprocating motion mechanism 402 is mounted on the base 401, and the sliding frame 403 is mounted on the first reciprocating motion mechanism 402. The sliding frame 403 has a top panel 4031. Each vertical telescopic member 404 is respectively mounted on the bottom surface of the top panel 4031 of the sliding frame 403. Each vertical telescopic member 404 has a vertically upward extending actuating end. The number of cap hanging rods 405 is the same as that of the vertical telescopic members 404 and they correspond one-to-one. Each cap hanging rod 405 is respectively mounted on the actuating end of the corresponding vertical telescopic member 404 and can extend from bottom to top through the top panel 4031 to above the top panel 4031.

[0038] like Figure 6 , 7 As shown, in one alternative embodiment of this application, the vertical telescopic member 404 is a third cylinder, and the actuating end is the piston shaft of the third cylinder.

[0039] like Figure 6 , 7 As shown, in one alternative embodiment of this application, the first reciprocating motion mechanism 402 is a first cylinder, and the sliding frame 403 is mounted on the piston shaft of the first cylinder. The trajectory of the sliding frame 403 driven by the first cylinder passes through the outlet of the conveying channel 301.

[0040] like Figure 1 , 6 As shown in Figure 7, in an optional embodiment of this application, the area of ​​the turntable 201 near the arc-shaped positioning device 5 is provided with a sealing cap installation station A. The arc-shaped positioning device 5 includes a positioning platform 502 mounted on the frame 1 and located in front of the turntable 201, and an arc-shaped groove plate 503 mounted on the positioning platform 502. The arc-shaped groove plate 503 has multiple positioning grooves 501, each positioning groove 501 extending from its rear opening toward the turntable 201, and the front ends of all positioning grooves 501 forming a first arc. The first arc is the same as the second arc formed by the multiple positioning rods 202 on the turntable 201 at the sealing cap installation station A, and the first arc and the second arc are parallel to each other. Since the first arc and the second arc are the same and parallel to each other, after the multiple sealing caps gripped by the sealing cap synchronous gripping and releasing device 7 move above these positioning rods 202, they can be accurately fitted downwards onto the nozzles located on these positioning rods 202.

[0041] like Figure 6 , 7As shown, in one alternative embodiment of this application, the push-cover insertion device 6 includes a second reciprocating motion mechanism 601 and a push-cover plate 602. The second reciprocating motion mechanism 601 is mounted on the base 401, and the push-cover plate 602 is mounted on the second reciprocating motion mechanism 601. The path of the second reciprocating motion mechanism 601 driving the push-cover plate 602 to move passes above the arc-shaped positioning device 5.

[0042] like Figure 8 As shown, in an alternative embodiment, the front end face of the push cover plate 602 has a plurality of positioning half grooves 6021 for positioning the sealing cover, and all positioning half grooves 6021 form a third arc that matches the first arc formed at the front end of the positioning groove 501.

[0043] like Figure 6 , 7 As shown, in an alternative embodiment of this application, a sealing cover limiting plate 603 is further installed at the top of the push cover plate 602. The function of the sealing cover limiting plate 603 is to prevent the sealing cover from coming out of each positioning groove 501 during the pushing process.

[0044] like Figure 6 , 7 As shown, in one alternative embodiment of this application, the second reciprocating motion mechanism 601 is a second cylinder, and the push cover plate 602 is mounted on the piston shaft of the second cylinder.

[0045] like Figure 9 , 10 As shown, in an optional embodiment of this application, the sealing cap synchronous gripping and releasing device 7 includes a support frame 701, a drive component 702, a swing frame 703, and multiple cap tightening units 704. The support frame 701 is mounted on the frame 1, the swing frame 703 is mounted on the support frame 701, the drive component 702 is mounted on the support frame 701 and is connected to the swing frame 703 and drives the swing frame 703 to swing. All cap tightening units 704 are respectively mounted on the swing frame 703. The swing frame 703 swings back and forth between above the arc-shaped groove plate 503 and above the multiple positioning rods 202 located at the sealing cover installation station A. When the swing frame 703 drives each cap tightening unit 704 to move above the arc-shaped groove plate 503, each cap tightening unit 704 grabs the sealing cover located at the front end of each positioning groove 501. When the swing frame 703 drives each cap tightening unit 704 to move above the multiple positioning rods 202 located at the sealing cover installation station A, each cap tightening unit 704 puts the grabbed sealing cover onto the nozzle located on each positioning rod 202 and tightens it.

[0046] like Figure 9 , 10As shown, in an optional embodiment of this application, the support frame 701 includes a first support plate 7011 and a second support plate 7012. The bottom ends of the first support plate 7011 and the second support plate 7012 are respectively mounted on the frame 1. The swing frame 703 includes a first swing plate 7031, a second swing plate 7032, a suspension beam 7033, and a suspension beam state holding unit 7034. The suspension beam state holding unit 7034 includes a rotating shaft 70341, a first synchronous belt 70342, two first synchronous pulleys 70343, a synchronous rotating rod 70344, a second synchronous belt 70345, and two second synchronous pulleys 70346. The driving member 702 is mounted on the top of the first support plate 7011. The first swing plate 7031 is fixed on the output shaft of the driving member 702. The first synchronous pulley 70343 is fixed on the first support plate 7011 and is sleeved on the output shaft of the driving member 702. It can rotate relative to the output shaft. The rotating shaft 70341 is rotatably mounted on the top of the second support plate 7012. The second swing plate 7032 is fixed on the rotating shaft 70341. The first second synchronous wheel 70346 is fixed on the second support plate 7012. The second synchronous wheel 70346 is sleeved on the rotating shaft 70341 and can rotate relative to the rotating shaft 70341. The two ends of the synchronous rotating rod 70344 are rotatably mounted on the top of the first swing plate 7031 and the top of the second swing plate 7032, respectively. The second first synchronous wheel 70343 and the second second synchronous wheel 70346 are fixed on both sides of the synchronous rotating rod 70344. The first synchronous belt 70342 is sleeved on the two first synchronous wheels 70343. The second synchronous belt 70345 is sleeved on the two second synchronous wheels 70346. The suspension beam 7033 is fixed on the synchronous rotating rod 70344. All the screw cap units 704 are respectively mounted on the suspension beam 7033. The driving component 702 drives the first swing plate 7031 to rotate by an angle. Since the first synchronous pulley 70343 is stationary, it rotates by the same angle in the opposite direction relative to the first swing plate 7031. The first synchronous pulley 70343 drives the second synchronous pulley 70343 to rotate by the same angle in the opposite direction via the first synchronous belt 70342. The second synchronous pulley 70343 drives the synchronous rotating rod 70344 to rotate by the same angle in the opposite direction. The suspension beam 7033 follows the synchronous rotating rod 70344, so the suspension beam 7033 can remain unchanged (rotating by an angle in the forward direction and rotating by an angle in the reverse direction cancel each other out). The second synchronous pulley 70346 rotates in the same way as the second synchronous pulley 70343, while the first synchronous pulley 70346 does not rotate. The second swing plate 7032 rotates in the same way as the first swing plate 7031.

[0047] like Figure 9 , 10As shown, in one alternative embodiment of this application, the drive unit 702 is a servo motor.

[0048] like Figure 9 , 10 As shown, in one optional embodiment of this application, the cap-tightening unit 704 includes a rotating component 7041, a three-jaw cylinder 7042, and three cap-clamping friction wheels 7043. The rotating component 7041 is mounted on the suspension beam 7033, and the bottom end of the rotating component 7041 has a rotating end. The three-jaw cylinder 7042 is mounted on the rotating end, and the three cap-clamping friction wheels 7043 are respectively mounted on the three jaws of the three-jaw cylinder 7042.

[0049] like Figure 9 , 10 As shown, in one optional embodiment of this application, the rotating component 7041 is a servo motor, and the rotating end is the output shaft of the servo motor.

[0050] like Figure 6 , 11 As shown, in an optional embodiment of this application, the sealing cap installation mechanism further includes a control device 8 and multiple detection devices 9. The number of detection devices 9 corresponds to the number of positioning slots 501, and each detection device 9 is installed in the positioning platform 502 at the front end of the corresponding positioning slot 501. The detection device 9 sends a detection signal, and the control device 8 receives the signal and controls all vertical telescopic components 404, the first reciprocating motion mechanism 402, the second reciprocating motion mechanism 601, the vibrating plate 3, and the sealing cap synchronous gripping and releasing device 7 to operate. When the detection device 9 detects that there is no sealing cap at the front end of the corresponding positioning slot 501, the control device 8 controls the first reciprocating motion mechanism 402 and the corresponding vertical telescopic component 404 to operate, receiving another sealing cap at the outlet of the conveying channel 301 and transferring it to the rear entrance of the positioning slot 501. Then, the second reciprocating motion mechanism 601 pushes the sealing cap into the front end of the positioning slot 501. Finally, the control device 8 controls the sealing cap synchronous gripping and releasing device 7 to operate. The specific control process of the control device 8 can be designed according to the actual needs of the producer and will not be described in detail here.

[0051] The following is combined with Figure 1-11 Let me introduce the work process:

[0052] 1. Vibratory feeder 3 sequentially delivers sealing covers through conveying channel 301;

[0053] 2. The sealing cap sequential positioning device 4 receives four sealing caps in sequence and then horizontally transfers the four sealing caps to the front of the turntable 201.

[0054] 3. The push-cap insertion device 6 pushes the four sealing caps into the front ends of the four positioning slots 501 of the arc-shaped positioning device 5 respectively.

[0055] 4. The sealing cap synchronous gripping and releasing device 7 synchronously grips the sealing caps located in the 54 positioning slots 501 of the arc-shaped positioning device 54, lifts them up and moves them to the top of the 4 positioning rods 202 of the turntable 201 located at the sealing cap installation station A, which are respectively fitted with nozzles. The sealing caps are then put down onto the nozzles located below and tightened.

[0056] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the scope of protection of this invention.

Claims

1. An assembly mechanism for a stand-up pouch nozzle production line, comprising a frame and a rotary nozzle carrying device mounted on the frame, the rotary nozzle carrying device having an intermittently rotating turntable, the edge of the turntable being provided with a plurality of positioning rods for positioning the nozzles, the assembly mechanism further comprising a sealing cap mounting mechanism, characterized in that: Sealing cap mounting mechanism includes The vibratory feeder sequentially delivers the sealing covers through a conveyor channel; The sealing cap sequential positioning device receives a predetermined number of sealing caps in sequence and then horizontally transfers the predetermined number of sealing caps to the front of the turntable. An arc-shaped positioning device has multiple positioning grooves that can receive a predetermined number of sealing caps and arrange them in an arc shape; The push-cap insertion device pushes a predetermined number of sealing caps located in the sealing cap sequence positioning device into the positioning groove of the arc-shaped positioning device. The sealing cap synchronous gripping and releasing device synchronously grips all the sealing caps located in the positioning slots of the arc-shaped positioning device, lifts them up and moves them to the edge of the turntable above a predetermined number of positioning rods, each equipped with a nozzle. The sealing caps are then placed downwards onto the nozzles located below and tightened. The sealing cover sequential positioning device includes a base, a first reciprocating motion mechanism, a sliding frame, multiple vertical telescopic components, and multiple cover hanging rods. The base is mounted on the frame, the first reciprocating motion mechanism is mounted on the base, the sliding frame is mounted on the first reciprocating motion mechanism, the sliding frame has a top panel, each vertical telescopic component is mounted on the bottom surface of the top panel of the sliding frame, each vertical telescopic component has an upwardly extending actuating end, the number of cover hanging rods is the same as the number of vertical telescopic components and they correspond one-to-one, each cover hanging rod is mounted on the actuating end of the corresponding vertical telescopic component and can extend from bottom to top through the top panel to the top of the top panel; The area of ​​the turntable near the arc-shaped positioning device is provided with a sealing cover installation station. The arc-shaped positioning device includes a positioning platform installed on the frame and set in front of the turntable, and an arc-shaped groove plate installed on the positioning platform. The arc-shaped groove plate has multiple positioning grooves. Each positioning groove extends from the rear opening toward the turntable and the front end of all positioning grooves forms a first arc. The first arc is the same as the second arc formed by multiple positioning rods on the turntable at the sealing cover installation station, and the first arc and the second arc are parallel to each other. The sealing cap synchronous gripping and releasing device includes a support frame, a driving component, a swing frame, and multiple cap tightening units. The support frame is installed on the machine frame, the swing frame is installed on the support frame, the driving component is installed on the support frame and is connected to the swing frame and drives the swing frame to swing. All cap tightening units are respectively installed on the swing frame. The support frame includes a first support plate and a second support plate, the bottom ends of which are respectively mounted on the frame. The swing frame includes a first swing plate, a second swing plate, a suspension beam, and a suspension beam state holding unit. The suspension beam state holding unit includes a rotating shaft, a first synchronous belt, two first synchronous pulleys, a synchronous rotating rod, a second synchronous belt, and two second synchronous pulleys. The drive component is mounted on the top of the first support plate. The first swing plate is fixed to the output shaft of the drive component. The first synchronous pulley is fixed to the first support plate and is sleeved on the output shaft of the drive component, allowing it to move relative to the output shaft. The rotating shaft is rotatably mounted on the top of the second support plate. The second swing plate is fixed on the rotating shaft. The first second synchronous wheel is fixed on the second support plate. The second synchronous wheel is sleeved on the rotating shaft and can rotate relative to the rotating shaft. The two ends of the synchronous rotating rod are rotatably mounted on the top of the first swing plate and the top of the second swing plate, respectively. The second first synchronous wheel and the second second synchronous wheel are fixed on both sides of the synchronous rotating rod, respectively. The first synchronous belt is sleeved on the two first synchronous wheels, and the second synchronous belt is sleeved on the two second synchronous wheels. The suspension beam is fixed on the synchronous rotating rod, and all the capping units are respectively mounted on the suspension beam.

2. The assembly mechanism of the stand-up pouch nozzle production line as described in claim 1, characterized in that: The first reciprocating motion mechanism is a first cylinder, and the sliding frame is mounted on the piston shaft of the first cylinder. The trajectory of the sliding frame driven by the first cylinder passes through the outlet of the conveying channel.

3. The assembly mechanism of the stand-up pouch nozzle production line as described in claim 1, characterized in that: The push-cover-in-slot device includes a second reciprocating motion mechanism and a push-cover plate. The second reciprocating motion mechanism is mounted on the base, and the push-cover plate is mounted on the second reciprocating motion mechanism. The path of the push-cover plate driven by the second reciprocating motion mechanism passes above the arc-shaped positioning device.

4. The assembly mechanism of the stand-up pouch nozzle production line as described in claim 3, characterized in that: The front end face of the push cover plate has multiple positioning half-grooves for positioning the sealing cover, and all positioning half-grooves form a third arc that matches the first arc formed at the front end of the positioning groove.

5. The assembly mechanism of the stand-up pouch nozzle production line as described in claim 3, characterized in that: A sealing cover limiting plate is also installed at the top of the push cover plate.

6. The assembly mechanism of the stand-up pouch nozzle production line as described in claim 3, characterized in that: The second reciprocating motion mechanism is a second cylinder, and the push cover plate is mounted on the piston shaft of the second cylinder.

Images