A servo tuck drive unit

Abstract

This invention discloses a servo-driven reverse wrapping unit, comprising: a forming drum, a left reverse wrapping rod, a right reverse wrapping rod, a first reverse wrapping rod push plate, a rotary seal, a clamping device, a second reverse wrapping rod push plate, a linear guide device, a lead screw seat, and a ball screw pair. The left and right reverse wrapping rods are respectively installed at both ends of the forming drum. The outer periphery of the right reverse wrapping rod is rigidly connected to the first reverse wrapping rod push plate, and the shaft of the right reverse wrapping rod is connected to the rotary seal. The first reverse wrapping rod push plate can be detachably connected to the second reverse wrapping rod push plate via the clamping device. The second reverse wrapping rod push plate is connected to the lead screw seat via the linear guide device 7. The lead screw seat is mounted on the ball screw pair, which is connected to the servo-driven unit. Both the second reverse wrapping rod push plate and the servo-driven unit are mounted on a chassis. The servo-driven reverse wrapping unit provided by this invention can solve the problems of inconsistent pneumatic reverse wrapping synchronization and difficulty in accurately controlling the reverse wrapping force in the prior art.

Description

Technical Field

[0001] This invention relates to the field of tire and rubber machinery technology, and in particular to a servo reverse-wrapping drive unit. Background Technology

[0002] The forming drum, with its continuously rotating outer surface, fulfills the requirements for bonding, shaping, and wrapping various layers of rubber materials, such as the PA composite of the tire carcass, #1 cord fabric, and #2 cord fabric, thereby enabling the production of the tire carcass composite. The wrapping rods are located on the left and right sides of the forming drum. The sidewall wrapping function is driven by cylinders built into the forming drum. Because the gas is introduced from one side of the forming drum, it takes a certain amount of time for the gas to travel to the other side, resulting in inconsistent movements of the wrapping rods on both sides. This can cause a creeping phenomenon during the wrapping process, affecting tire quality and even leading to defective tires. Furthermore, the wrapping force of pneumatic wrapping is difficult to control precisely. Insufficient wrapping force will result in incomplete sidewall wrapping, while excessive force will cause obvious sun marks on the tire, affecting tire quality. Therefore, servo wrapping technology has become a new requirement for industry development.

[0003] However, the existing technology of internal double screw servo reverse wrapping technology commonly used in all-steel forming machines cannot be applied to semi-steel forming machines due to the space limitations of the drum spindle. Another technology, dual-sided external servo drive, requires servo push plates to push the reverse wrapping rods on both sides of the forming drum. This structure can only be adapted to specific machine models and has certain space limitations. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a servo reverse wrapping drive unit that can solve the problems of inconsistent pneumatic reverse wrapping synchronization and difficulty in accurately controlling the reverse wrapping force in the prior art.

[0005] This invention provides a servo reverse wrapping drive unit, comprising: a forming drum, a left reverse wrapping rod, a right reverse wrapping rod, a No. 1 reverse wrapping rod push plate, a rotary seal, a clamping device, a No. 2 reverse wrapping rod push plate, a linear guide device, a lead screw seat, and a ball screw pair;

[0006] The forming drum is equipped with a left reverse wrapping rod and a right reverse wrapping rod at its two ends. The outer periphery of the right reverse wrapping rod is rigidly connected to the No. 1 reverse wrapping rod push plate, and the shaft of the right reverse wrapping rod is connected to the rotary seal. When the No. 1 reverse wrapping rod push plate moves to the left, it can provide driving force for the left and right reverse wrapping rods. At the same time, the rotary seal provides aerodynamic balancing force for the left and right reverse wrapping rods. Under the combined action of driving force and aerodynamic balancing force, the left and right reverse wrapping rods can be raised.

[0007] The No. 1 reverse wrapping rod pusher can be detachably connected to the No. 2 reverse wrapping rod pusher via a clamping device. The No. 2 reverse wrapping rod pusher is connected to the lead screw nut via a linear guide device. The lead screw nut is mounted on a ball screw pair, which is connected to a servo drive unit. The servo drive unit can drive the lead screw nut to move on the ball screw pair. Both the No. 2 reverse wrapping rod pusher and the servo drive unit are mounted on the chassis. When the servo drive unit drives the lead screw nut to move to the left, it can drive the linear guide device and the No. 2 reverse wrapping rod pusher to move to the left simultaneously. At this time, the No. 2 reverse wrapping rod pusher and the No. 1 reverse wrapping rod pusher are clamped together via the clamping device. The No. 2 reverse wrapping rod pusher can drive the No. 1 reverse wrapping rod pusher to move to the left, thereby driving the left and right reverse wrapping rods to rise.

[0008] Furthermore, a left reverse wrapping drive component is connected to the left reverse wrapping rod, and a right reverse wrapping drive component is connected to the right reverse wrapping rod. The left and right reverse wrapping drive components are fixedly connected by left and right reverse wrapping rod connectors. The left and right reverse wrapping drive components, the right reverse wrapping drive components, and the left and right reverse wrapping rod connectors are all located inside the forming drum. When the No. 1 reverse wrapping rod push plate moves to the left, the No. 1 reverse wrapping rod push plate can drive the right reverse wrapping rod to rise, and at the same time drive the right reverse wrapping drive component to move to the left. When the right reverse wrapping drive component moves to the left, the left and right reverse wrapping rod connectors synchronously drive the left reverse wrapping drive component to move to the right, and at the same time drive the left reverse wrapping rod to rise.

[0009] Furthermore, the servo drive unit includes a servo motor, a driving toothed pulley, a toothed belt, and a driven toothed pulley. The output shaft of the servo motor is connected to the shaft hole of the driving toothed pulley, and the servo motor can drive the driving toothed pulley to rotate. The driving toothed pulley is connected to the driven toothed pulley through the toothed belt, and the driven toothed pulley is connected to the ball screw of the ball screw pair. When the servo motor drives the driving toothed pulley to rotate, the power transmission through the toothed belt drives the driven toothed pulley to rotate, thereby driving the screw nut to move on the ball screw pair.

[0010] Furthermore, when push plates 1 and 2 drive the left and right reverse wrapping rods, they are clamped together by a clamping device, i.e., the clamping device is in a clamped state. In the remaining processes, push plates 1 and 2 separate, i.e., the clamping device is in an unlocked state. When push plates 1 and 2 separate, the left and right reverse wrapping rods can fall quickly using only pneumatic balance force.

[0011] Furthermore, the clamping device includes a first clamping system or a second clamping system.

[0012] Furthermore, the first clamping system includes an electromagnet, which is fixed to the No. 2 reverse wrapping rod push plate by screws. The No. 1 reverse wrapping rod push plate serves as the armature of the electromagnet. The end face of the electromagnet can be quickly attracted or separated from the end face of the No. 1 reverse wrapping rod push plate by the switching on and off of the current, thereby realizing the clamping or separation between the No. 1 reverse wrapping rod push plate and the No. 2 reverse wrapping rod push plate.

[0013] Furthermore, the second clamping system is a zero-point positioning system, including a zero-point flexible positioning pin assembly and a zero-point positioner. The zero-point flexible positioning pin assembly is fixedly installed on the No. 1 reverse wrapping rod push plate, and the zero-point positioner is fixedly installed on the No. 2 reverse wrapping rod push plate. The zero-point flexible positioning pin assembly can quickly engage or disengage with the zero-point positioner, thereby achieving clamping or separation between the No. 1 and No. 2 reverse wrapping rod push plates.

[0014] Furthermore, the zero-point flexible positioning pin assembly includes a floating sleeve, a fixed flange, an elastic element, fastening bolts, and a flexible positioning pin. The fastening bolts and the flexible positioning pin are installed inside the fixed flange through the elastic element, and the flexible positioning pin is fixedly connected to the No. 1 reverse wrapping rod push plate through the fixed flange. During the process of the zero-point flexible positioning pin assembly being inserted into the zero-point positioner, the elastic element can squeeze the flexible positioning pin to a fixed position to form a self-locking angle, so that the zero-point flexible positioning pin assembly can be accurately inserted into the zero-point positioner. After the zero-point flexible positioning pin assembly is unlocked from the zero-point positioner, the flexible positioning pin can be reset due to the recovery of the deformation of the elastic element.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] This embodiment provides a servo reverse wrapping drive unit, which can solve the problems of inconsistent pneumatic reverse wrapping synchronization and difficulty in accurately controlling the reverse wrapping force in the prior art; at the same time, it can also solve the problem that the dual-side push plate servo reverse wrapping can only be applied to specific models and is limited by space.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an overall front view of a servo anti-packet driving unit provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the synchronous motion of the left and right anti-packet driving components of a servo anti-packet driving unit provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing the positions of the sensor detection board and distance detection sensor of a servo reverse-packaging drive unit provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a servo drive unit for a servo reverse-packet drive unit provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of a first clamping system of a servo reverse wrapping drive unit provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of a second clamping system for a servo reverse wrapping drive unit provided in an embodiment of the present invention;

[0026] Figure 7 This is a front view of a first clamping system of a servo reverse wrapping drive unit provided in an embodiment of the present invention;

[0027] Figure 8 This is a front view of a second clamping system of a servo reverse wrapping drive unit in the unlocked state, provided in an embodiment of the present invention.

[0028] Figure 9 This is a cross-sectional view of a second clamping system of a servo reverse wrapping drive unit in the unlocked state, provided in an embodiment of the present invention.

[0029] Figure 10 This is a cross-sectional view of a second clamping system in a clamping state for a servo reverse wrapping drive unit provided in an embodiment of the present invention;

[0030] Figure 11 This is a cross-sectional enlarged schematic diagram of a second clamping system of a servo reverse wrapping drive unit in a clamping state, provided in an embodiment of the present invention;

[0031] Figure 12This is a schematic diagram showing the position of the zero-point positioning pin assembly of a servo reverse wrapping drive unit installed on the push plate of the No. 1 reverse wrapping rod, provided in an embodiment of the present invention.

[0032] Figure 13 A schematic diagram showing the position of the zero-point positioner of a servo reverse wrapping drive unit installed on the push plate of the No. 2 reverse wrapping rod, provided in an embodiment of the present invention;

[0033] Figure 14 This is a schematic diagram of the zero-point positioning pin assembly of a servo reverse-packing drive unit provided in an embodiment of the present invention;

[0034] Figure 15 This is a cross-sectional view of a zero-point positioning pin assembly of a servo reverse-wrapping drive unit provided in an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] To facilitate understanding of this embodiment, in conjunction with Figures 1-15 A detailed description of a servo reverse-packet driving unit disclosed in the embodiments of the present invention will be provided.

[0038] A servo reverse wrapping drive unit includes: a forming drum 2, a left reverse wrapping rod 1, a right reverse wrapping rod 3, a No. 1 reverse wrapping rod push plate 4, a rotary seal 28, a clamping device 5, a No. 2 reverse wrapping rod push plate 6, a linear guide device 7, a lead screw seat 9, and a ball screw pair 8.

[0039] like Figure 1 As shown, a left reverse wrapping rod 1 and a right reverse wrapping rod 3 are respectively installed at both ends of the forming drum 2. The outer periphery of the right reverse wrapping rod 3 is rigidly connected to the No. 1 reverse wrapping rod push plate 4, and the shaft core of the right reverse wrapping rod 3 is connected to the rotary seal 28. When the No. 1 reverse wrapping rod push plate 4 moves to the left, it can provide driving force for the left reverse wrapping rod 1 and the right reverse wrapping rod 3. At the same time, the rotary seal 28 provides aerodynamic balancing force for the left reverse wrapping rod 1 and the right reverse wrapping rod 3. Under the combined action of driving force and aerodynamic balancing force, the left reverse wrapping rod 1 and the right reverse wrapping rod 3 can be raised.

[0040] Furthermore, a left reverse wrapping drive component 10 is connected to the left reverse wrapping rod 1, and a right reverse wrapping drive component 12 is connected to the right reverse wrapping rod 3. The left reverse wrapping drive component 10 and the right reverse wrapping drive component 12 are fixedly connected by a left and right reverse wrapping rod connector 11. The left reverse wrapping drive component 10, the right reverse wrapping drive component 12, and the left and right reverse wrapping rod connector 11 are all located inside the forming drum 2; combined with Figure 2 When the No. 1 reverse wrapping rod push plate 4 moves to the left, the No. 1 reverse wrapping rod push plate 4 can drive the right reverse wrapping rod 3 to rise, and at the same time drive the right reverse wrapping drive component 12 to move to the left; when the right reverse wrapping drive component 12 moves to the left, the left and right reverse wrapping rod connecting component 11 synchronously drives the left reverse wrapping drive component 10 to move to the right, and at the same time drives the left reverse wrapping rod 1 to rise.

[0041] The driving force provided by the No. 1 reverse wrapping rod push plate 4 and the pneumatic balancing force provided by the rotary seal 28 jointly drive the left reverse wrapping rod 1 and the right reverse wrapping rod 3 to rise, which enables the left and right reverse wrapping rod connecting parts 11 inside the forming drum 2 to be subjected to good force, and extends the life of the linear guide device 7, the ball screw pair 8 and the servo drive unit.

[0042] The No. 1 reverse wrapping rod push plate 4 can be detachably connected to the No. 2 reverse wrapping rod push plate 6 via the clamping device 5. The No. 2 reverse wrapping rod push plate 6 is connected to the lead screw nut 9 via the linear guide device 7. The lead screw nut 9 is mounted on the ball screw pair 8. The ball screw pair 8 is connected to the servo drive unit. The servo drive unit can drive the lead screw nut 9 to move on the ball screw pair 8. The No. 2 reverse wrapping rod push plate 6 and the servo drive unit are both mounted on the chassis. When the servo drive unit drives the lead screw nut to move to the left, it can drive the linear guide device 7 and the No. 2 reverse wrapping rod push plate 6 to move to the left at the same time. At this time, the No. 2 reverse wrapping rod push plate 6 and the No. 1 reverse wrapping rod push plate 4 are clamped together via the clamping device 5. The No. 2 reverse wrapping rod push plate 6 can drive the No. 1 reverse wrapping rod push plate to move to the left, thereby driving the left reverse wrapping rod 1 and the right reverse wrapping rod 3 to rise.

[0043] Among them, the linear guide device 7 has both guiding function and bearing radial bending moment function.

[0044] In this embodiment, combined with Figure 3 A sensor detection plate 29 is installed on the No. 1 reverse-wrapping rod push plate 4, and a distance detection sensor 30 is installed on the chassis. The distance detection sensor 30 can detect the distance between the chassis and the No. 1 reverse-wrapping rod push plate 4 by detecting the distance between itself and the sensor detection plate 29, which is the sum of the reverse-wrapping distance and the horizontal distance, and thus determine the reverse-wrapping distance. Among them, the reverse-wrapping distance is the distance that the reverse-wrapping rod travels from horizontal to complete the horizontal movement of the reverse-wrapping rod.

[0045] like Figure 4As shown, the servo drive unit further includes a servo motor, a driving toothed pulley 14, a toothed belt 13, and a driven toothed pulley 15. The output shaft of the servo motor is connected to the shaft hole of the driving toothed pulley 14. The servo motor can drive the driving toothed pulley 14 to rotate. The driving toothed pulley 14 is connected to the driven toothed pulley 15 through the toothed belt 13. The driven toothed pulley 15 is connected to the ball screw of the ball screw pair 8. When the servo motor drives the driving toothed pulley 14 to rotate, the power transmission through the toothed belt 13 drives the driven toothed pulley 15 to rotate, thereby driving the screw nut 9 to move on the ball screw pair 8.

[0046] In this embodiment, there are two ball screw pairs 8 and two driven toothed pulleys 15. The diameter of the driving toothed pulley 14 is different from that of the driven toothed pulley 15, which is intended to reduce speed and increase the conveying torque. A redirecting pulley 16 is provided between the driving toothed pulley 14 and the driven toothed pulley 15. The redirecting pulley 16 contacts the toothed belt 13, which is intended to increase the pulley wrap angle of the driving toothed pulley 14. The pulley wrap angle is the central angle subtended by the contact arc between the toothed belt 13 and the driving toothed pulley 14.

[0047] Furthermore, when the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6 drive the left reverse wrapping rod 1 and the right reverse wrapping rod 3, the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6 are clamped together by the clamping device 5, that is, the clamping device 5 is in the clamping state; in the remaining processes, the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6 are separated, that is, the clamping device 5 is in the unlocked state, and when the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6 are separated, the left reverse wrapping rod 1 and the right reverse wrapping rod 3 can fall quickly by relying only on the pneumatic balance force.

[0048] To avoid disrupting the overall machine's operation, the clamping device 5 between the No. 1 reverse-packing rod push plate 4 and the No. 2 reverse-packing rod push plate 6 needs to clamp quickly during clamping and unlock quickly during separation, while maintaining a significant clamping force after clamping. This is because, in the initial stage of the left reverse-packing rod 1 and right reverse-packing rod 3 rising, if the No. 1 reverse-packing rod push plate 4 and the No. 2 reverse-packing rod push plate 6 are not clamped, the moving speed of the No. 1 reverse-packing rod push plate 4 will be greater than that of the No. 2 reverse-packing rod push plate 6. Consequently, the left and right reverse-packing rods 1 and 3 will only be driven by the No. 1 reverse-packing push plate, thus negating the purpose of servo reverse-packing. Conversely, when the left and right reverse-packing rods 1 and 3 fall, if the No. 1 reverse-packing rod push plate 4 and the No. 2 reverse-packing rod push plate 6 can unlock quickly, the left and right reverse-packing rods 1 and 3 can fall rapidly under only aerodynamic balance force, thereby extending the lifespan of the servo drive unit inside the chassis.

[0049] Therefore, combining Figure 5 , Figure 6In a preferred embodiment, the clamping device 5 includes a first clamping system 17 or a second clamping system 19.

[0050] like Figure 7 As shown, the first clamping system 17 includes an electromagnet 18, which is fixed to the No. 2 reverse wrapping rod push plate 6 by screws. The No. 1 reverse wrapping rod push plate 4 serves as the armature of the electromagnet 18. The end face of the electromagnet 18 can be quickly attracted or separated from the end face of the No. 1 reverse wrapping rod push plate 4 by the switching on and off of the current, thereby realizing the clamping or separation between the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6.

[0051] Specifically, electromagnet 18 has a ring-shaped structure, and its shape can fit with the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6. When the drum shoulder of the forming drum is about to move to the working position, a positive pulse current is passed through electromagnet 18 to excite electromagnet 18. At this time, the end face of electromagnet 18 quickly attracts the end face of reverse wrapping rod push 1, realizing the clamping of No. 1 reverse wrapping rod push plate 4 and No. 2 reverse wrapping rod push plate 6. When the left reverse wrapping rod 1 and the right reverse wrapping rod 3 are about to fall, the positive pulse current is disconnected in electromagnet 18 and a reverse pulse current is passed through to demagnetize electromagnet 18. At this time, the end face of electromagnet 18 quickly separates from the end face of No. 1 reverse wrapping rod push plate 4, and No. 2 reverse wrapping rod push plate 6 retracts by servo force, realizing the separation of No. 1 reverse wrapping rod push plate 4 and No. 2 reverse wrapping rod push plate 6. Meanwhile, No. 1 reverse wrapping rod push plate 4 drives the left reverse wrapping rod 1 and the right reverse wrapping rod 3 to fall quickly by pneumatic force.

[0052] like Figures 8-11 As shown, the second clamping system 19 is a zero-point positioning system, including a zero-point positioning pin assembly 21 and a zero-point positioner 22. The zero-point positioning pin assembly 21 is fixedly installed on the No. 1 reverse wrapping rod push plate 4, and the zero-point positioner 22 is fixedly installed on the No. 2 reverse wrapping rod push plate 6. The zero-point positioning pin assembly 21 can quickly engage or disengage with the zero-point positioner 22, thereby achieving clamping or separation between the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate.

[0053] Combination Figure 12 , Figure 13Specifically, the zero-point positioning pin assembly 21 and the zero-point positioner 22 are evenly distributed on the end faces of the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6, respectively, and the positions of the zero-point positioning pin assembly 21 and the zero-point positioner 22 can accurately correspond to each other during pin engagement; when the drum shoulder of the forming drum is about to move to the working position, the No. 2 reverse wrapping rod push plate 6 moves to the left by the driving force from the servo drive unit, and the zero-point positioner 22 moves to the left, causing the zero-point positioning pin assembly 21 to insert into the zero-point positioner 22. Inside 2, the clamping of the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6 is achieved; when the left reverse wrapping rod 1 and the right reverse wrapping rod 3 are about to fall, compressed air is introduced into the zero point positioner 22. At this time, the zero point positioner 22 and the zero point positioning pin assembly 21 are quickly unlocked, and the No. 2 reverse wrapping rod push plate 6 moves to the right by the driving force from the servo drive unit, realizing the separation of the No. 1 reverse wrapping rod push plate 4 and the No. 2 reverse wrapping rod push plate 6. The No. 1 reverse wrapping rod push plate 4 drives the left reverse wrapping rod 1 and the right reverse wrapping rod 3 to fall quickly by air force.

[0054] In actual operation, during the process of inserting the zero-point positioning pin assembly 21 into the zero-point positioner 22, the rotation of the forming drum 2 will cause the zero-point positioning pin assembly 21 on the No. 1 reverse wrapping rod push plate 4 to produce a circumferential angular displacement deviation, which in turn causes a deviation in the pin insertion position relative to the zero-point positioning system 20. This can easily make it difficult for the zero-point positioning pin 21 to be accurately inserted into the zero-point positioner 22, resulting in damage to the mechanism.

[0055] Therefore, combining Figure 14 , Figure 15 In a preferred embodiment, the zero-point positioning pin assembly 21 includes a floating sleeve 23, a fixed flange 24, an elastic element 25, a fastening bolt 26, and a flexible positioning pin 27. The fastening bolt 26 and the positioning pin 27 are installed inside the fixed flange 24 through the elastic element 25, and the flexible positioning pin 27 is fixedly connected to the No. 1 reverse wrapping rod push plate 4 through the fixed flange 24. During the process of the zero-point positioning pin assembly 21 being inserted into the zero-point positioner 22, the elastic element 25 can squeeze the flexible positioning pin 27 to a fixed position to form a self-locking angle, so that the zero-point positioning pin assembly 21 can be accurately inserted into the zero-point positioner 22. In addition, after the zero-point positioning pin assembly 21 is unlocked from the zero-point positioner 22, the positioning pin 27 can be reset due to the recovery of the deformation of the elastic element 25.

[0056] The advantage of using the flexible positioning pin 27 is that, during the process of the zero-point positioning pin assembly 21 being inserted into the zero-point positioner 22, the positioning pin 27 floats due to the elastic deformation of the elastic element 25, thereby compensating for the position deviation and enabling the zero-point positioning pin assembly 21 to be accurately inserted into the zero-point positioner 22.

[0057] In this embodiment, the elastic element 25 is a spring.

[0058] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A servo reverse-packet driving unit, characterized in that, include: Forming drum, left reverse wrapping rod, right reverse wrapping rod, No. 1 reverse wrapping rod push plate, rotary seal, clamping device, No. 2 reverse wrapping rod push plate, linear guide device, lead screw nut, ball screw pair; The forming drum is equipped with a left reverse wrapping rod and a right reverse wrapping rod at its two ends. The outer periphery of the right reverse wrapping rod is rigidly connected to the No. 1 reverse wrapping rod push plate, and the shaft of the right reverse wrapping rod is connected to the rotary seal. When the No. 1 reverse wrapping rod push plate moves to the left, it can provide driving force for the left and right reverse wrapping rods. At the same time, the rotary seal provides aerodynamic balancing force for the left and right reverse wrapping rods. Under the combined action of driving force and aerodynamic balancing force, the left and right reverse wrapping rods can be raised. The No. 1 reverse wrapping rod pusher can be detachably connected to the No. 2 reverse wrapping rod pusher via a clamping device. The No. 2 reverse wrapping rod pusher is connected to the lead screw nut via a linear guide device. The lead screw nut is mounted on a ball screw pair, which is connected to a servo drive unit. The servo drive unit can drive the lead screw nut to move on the ball screw pair. Both the No. 2 reverse wrapping rod pusher and the servo drive unit are mounted on the chassis. When the servo drive unit drives the lead screw nut to move to the left, it can drive the linear guide device and the No. 2 reverse wrapping rod pusher to move to the left simultaneously. At this time, the No. 2 reverse wrapping rod pusher and the No. 1 reverse wrapping rod pusher are clamped together via the clamping device. The No. 2 reverse wrapping rod pusher can drive the No. 1 reverse wrapping rod pusher to move to the left, thereby driving the left and right reverse wrapping rods to rise. A left reverse wrapping drive component is connected to the left reverse wrapping rod, and a right reverse wrapping drive component is connected to the right reverse wrapping rod. The left and right reverse wrapping drive components are fixedly connected by left and right reverse wrapping rod connectors. The left and right reverse wrapping drive components, the left and right reverse wrapping drive components, and the left and right reverse wrapping rod connectors are all located inside the forming drum. When the push plate of the No. 1 reverse wrapping rod moves to the left, the push plate of the No. 1 reverse wrapping rod can drive the right reverse wrapping rod to rise, and at the same time drive the right reverse wrapping drive component to move to the left. When the right reverse wrapping drive component moves to the left, the left and right reverse wrapping rod connectors synchronously drive the left reverse wrapping drive component to move to the right, and at the same time drive the left reverse wrapping rod to rise. When push plates 1 and 2 drive the left and right reverse wrapping rods, they are clamped together by a clamping device, i.e., the clamping device is in a clamped state. In the remaining processes, push plates 1 and 2 are separated, i.e., the clamping device is in an unlocked state. When push plates 1 and 2 are separated, the left and right reverse wrapping rods can fall quickly by relying solely on pneumatic balance force.

2. The servo reverse-packet driving unit according to claim 1, characterized in that, The servo drive unit includes a servo motor, a driving toothed pulley, a toothed belt, and a driven toothed pulley. The output shaft of the servo motor is connected to the shaft hole of the driving toothed pulley, and the servo motor can drive the driving toothed pulley to rotate. The driving toothed pulley is connected to the driven toothed pulley through the toothed belt, and the driven toothed pulley is connected to the ball screw of the ball screw pair. When the servo motor drives the driving toothed pulley to rotate, the power transmission through the toothed belt drives the driven toothed pulley to rotate, which in turn drives the screw nut to move on the ball screw pair.

3. The servo reverse-packet driving unit according to claim 1, characterized in that, The clamping device includes a first clamping system or a second clamping system.

4. The servo reverse-packet driving unit according to claim 3, characterized in that, The first clamping system includes an electromagnet, which is fixed to the No. 2 reverse wrapping rod push plate by screws. The No. 1 reverse wrapping rod push plate serves as the armature of the electromagnet. The end face of the electromagnet can be quickly attracted or separated from the end face of the No. 1 reverse wrapping rod push plate by the switching on and off of the current, thereby realizing the clamping or separation between the No. 1 reverse wrapping rod push plate and the No. 2 reverse wrapping rod push plate.

5. A servo reverse-packet driving unit according to claim 3, characterized in that, The second clamping system is a zero-point positioning system, including a zero-point flexible positioning pin assembly and a zero-point positioner. The zero-point flexible positioning pin assembly is fixedly installed on the No. 1 reverse wrapping rod push plate, and the zero-point positioner is fixedly installed on the No. 2 reverse wrapping rod push plate. The zero-point flexible positioning pin assembly can quickly engage or disengage with the zero-point positioner, thereby achieving clamping or separation between the No. 1 and No. 2 reverse wrapping rod push plates.

6. A servo reverse-packet driving unit according to claim 5, characterized in that, The zero-point flexible positioning pin assembly includes a floating sleeve, a fixed flange, an elastic element, fastening bolts, and a flexible positioning pin. The fastening bolts and the flexible positioning pin are installed inside the fixed flange via the elastic element, and the flexible positioning pin is fixedly connected to the push plate of the No. 1 reverse wrapping rod via the fixed flange. During the process of inserting the zero-point flexible positioning pin assembly into the zero-point positioner, the elastic element can squeeze the flexible positioning pin to a fixed position to form a self-locking angle, so that the zero-point flexible positioning pin assembly can be accurately inserted into the zero-point positioner. After the zero-point flexible positioning pin assembly is unlocked from the zero-point positioner, the flexible positioning pin can be reset due to the recovery of the deformation of the elastic element.

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