A battery core tape shrinkage smoothing mechanism

Abstract

A cell tape necking and smoothing mechanism comprises: a mounting plate, a necking assembly and a swinging drive unit providing driving force for the movement of the necking assembly provided on the mounting plate; the necking assembly comprises: a necking assembly base, a blade drive disk, a plurality of shaping blades driven by the blade drive disk, the shaping blades are adjacently arranged and form a ring, a blade guide plate provided at the bottom of the necking assembly base, and a drive rod connected to the blade drive disk; the swinging drive unit drives the drive rod to move along the circumference via a swinging connecting rod. The necking assembly of the present invention is similar to an iris-type aperture structure, and the swinging drive unit controls the drive rod to move along the circumference to open or neck the shaping blades. The shaping blades of the present invention perform a circular motion around the cell while necking, which can evenly shrink the tape covering the cell, fix the insulating sheet at the end of the cell to the end face of the cell, prevent the insulating sheet from falling off in subsequent production, and reduce wrinkles caused by tape shrinkage, thereby improving the quality of tape pressing.

Description

Technical Field

[0001] The invention belongs to the technical field of battery automated production equipment, and in particular relates to a cell tape shrinkage smoothing mechanism for shrinking and smoothing a tape covering an end portion of a cell. Background Art

[0002] During the production process of cylindrical battery cells, it is necessary to attach an insulating sheet to the end face of the battery cell. In order to prevent the insulating sheet from falling off, a heat-resistant tape is usually wrapped around the end of the battery cell to fix the insulating sheet. When wrapping the battery cell tape with tape, the tape is wrapped around the outer surface of the end of the battery cell and the outer surface of the insulating sheet. In order to fix the insulating sheet, the tape usually extends a certain length beyond the insulating sheet in the axial direction of the battery cell. The extended portion of the tape needs to be smoothed to ensure effective fixation of the insulating sheet. At the same time, care should be taken to avoid wrinkles on the tape when smoothing. Therefore, it is necessary to develop a mechanism that can evenly shrink and smooth the tape wrapped around the end of the battery cell. Summary of the Invention

[0003] The object of the present invention is to provide a cell tape shrinkage smoothing mechanism which can evenly shrink and smooth the tape covering the end of a cell.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] The cam is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, A blade guide plate, wherein a through hole and a blade guide groove surrounding the periphery of the through hole are provided on the blade guide plate, and the pin shaft extends into the blade guide groove and can move along the blade guide groove; a driving rod connected to the blade driving disk; the swing driving unit drives the driving rod to move along the circumference through the swing connecting rod, and a swing track groove is provided on the mounting plate, and the swing connecting rod moves along the swing track groove; when the swing driving unit controls the driving rod to move along the circumference, the shaping blade can be opened or shrunken. When the shaping blade is opened, the projection of the shaping blade on the blade guide plate is located on the periphery of the through hole. When the shaping blade is shrunken, the projection of the shaping blade on the blade guide plate is located in the through hole.

[0006] As described above, for the cell tape shrinkage smoothing mechanism, optionally, the blade drive disc is arranged in the shrinkage component base via a deep groove ball bearing, and the blade guide plate is fixedly connected to the shrinkage component base.

[0007] As for the battery cell tape shrinkage smoothing mechanism as described above, optionally, the swinging drive unit is a swinging cylinder, and the swinging cylinder is arranged on the mounting plate; the output shaft of the swinging cylinder is connected to the first connecting plate, and the first connecting plate is provided with a slide rail, and the slide rail is provided with a second connecting plate, the second connecting plate can move along the slide rail, and the second connecting plate is connected to the swing connecting rod; the extension direction of the slide rail is the radial direction of the circle formed when the first connecting plate rotates around the output shaft of the swinging cylinder, and the output shaft of the swinging cylinder is parallel to the axial direction of the swing connecting rod.

[0008] As described above, the battery cell tape shrinkage smoothing mechanism, optionally, the swing cylinder is arranged on the upper surface of the mounting plate, the shrinkage assembly is located below the mounting plate, the swing trajectory groove is a through groove, the swing connecting rod passes through the swing trajectory groove, the upper end is connected to the second connecting plate, and the lower end is connected to the driving rod.

[0009] As described above, the battery cell tape shrinkage smoothing mechanism, optionally, a follower bearing is provided on the swing link, and the follower bearing can move along the swing track groove; the swing link is connected to the drive rod through a follower drive connector.

[0010] As described above, for the battery cell tape shrinkage smoothing mechanism, optionally, the mounting plate is provided with swing buffer limiters located on both sides of the first connecting plate, and the first connecting plate rotates between the swing buffer limiters.

[0011] As described above, for the battery cell tape shrinkage and smoothing mechanism, optionally, a battery cell positioning assembly is provided on the mounting plate, and the shrinkage assembly is connected to the battery cell positioning assembly and can move up and down under the control of the battery cell positioning assembly.

[0012] As described above, for the battery cell tape shrinkage smoothing mechanism, optionally, the battery cell positioning component is a lifting cylinder, and the piston rod of the lifting cylinder is connected to the shrinkage component.

[0013] As described above, the battery cell tape shrinkage smoothing mechanism, optionally, the battery cell positioning assembly further includes a buffer spring, the buffer spring is connected to the mounting plate, a shrinkage assembly mounting plate is provided at the bottom of the buffer spring, and the lifting cylinder is provided on the shrinkage assembly mounting plate.

[0014] In the battery cell tape shrinkage smoothing mechanism as described above, optionally, the swing track groove is an arc-shaped groove, and the arc-shaped groove and the ring formed by the shaping blades are concentric.

[0015] As can be seen from the above technical solutions, the present invention designs a shrinking component similar to an iris-type aperture structure. The multiple shaping blades of the shrinking component move simultaneously under the drive of the blade drive disk, and under the guidance of the blade guide groove, can shrink while making a circular motion with the battery cell, so as to achieve the shrinkage and smoothing of the tape covering the end of the battery cell. The tape after shrinkage and smoothing can flatly cover the insulating sheet, so that the insulating sheet at the end of the battery cell can be fixedly attached to the end face of the battery cell, so as to avoid the insulating sheet falling off due to unstable adhesion in subsequent production. The shaping blades of the present invention make a circular motion around the battery cell while shrinking, which can make the tape covering the battery cell shrink evenly, reduce the wrinkles caused by the shrinkage of the tape, and improve the quality of the tape pressing on the end face of the battery cell. Moreover, the iris-type shrinking component also completes the smoothing of the tape while shrinking. One workstation completes two actions, which can reduce the space occupied by the mechanism, thereby saving space on the battery production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a battery tape shrinkage smoothing mechanism according to an embodiment of the present invention;

[0018] Figure 2 This is a structural schematic diagram of the battery cell tape shrinkage smoothing mechanism from another angle according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of a battery tape shrinkage smoothing mechanism according to an embodiment of the present invention;

[0020] Figure 4 This is a bottom schematic diagram of the necking assembly in the open state according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic structural diagram of a shaping blade according to an embodiment of the present invention;

[0022] Figure 6 A side view of a shaping blade according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the shaping blade state when the necking assembly is in the open state according to an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of removing a shaping blade from a necking assembly in an open state according to an embodiment of the present invention;

[0025] Figure 9 This is a bottom schematic diagram of the necking assembly in the necking state according to an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the shaping blade state of the necking assembly in the necking state according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of a battery cell before shrinking and smoothing according to an embodiment of the present invention;

[0028] Figure 12 This is a schematic diagram of the battery cell after the shrinkage is smoothed according to an embodiment of the present invention.

[0029] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the drawings showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. It should be noted that the drawings are simplified and all use non-precise scales, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "positive", "negative", "bottom", "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components; it can mean a wireless connection or a wired connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, the battery cell tape necking and smoothing mechanism of this embodiment includes: a mounting plate 1, a swing drive unit 2, a swing link 3, a necking assembly 4, and a battery cell positioning assembly 5. The mounting plate 1 serves as the mounting base for the various components and is used to mount the necking and smoothing mechanism on the equipment rack (not shown) of the battery cell production equipment.

[0033] The swing drive unit 2 provides the driving force for the movement of the necking assembly 4. It rotates the drive rod in the necking assembly 4 via the swing connecting rod 3. In this embodiment, the swing drive unit 2 utilizes a swing cylinder. The swing cylinder is mounted on the mounting plate 1. The output shaft of the swing cylinder is connected to the first connecting plate 6. The first connecting plate 6 is provided with a slide rail 6-1. A second connecting plate 7 is mounted on the slide rail 6-1. The second connecting plate 7 can move along the slide rail 6-1, that is, the second connecting plate 7 can move relative to the first connecting plate 6.

[0034] The swing link 3 is connected to the second connecting plate 7. In this embodiment, the axial direction of the swing link 3 is parallel to the output shaft of the swing cylinder. When the swing cylinder rotates the first connecting plate 6 around the output shaft, the first connecting plate 6 rotates with the second connecting plate 7, which in turn drives the swing link 3 with it. The slide rail 6-1 extends in the radial direction of the circle formed by the first connecting plate 6 rotating around the output shaft of the swing cylinder.

[0035] The mounting plate 1 is provided with a swing track groove 1a. In this embodiment, the swing track groove 1a is a through groove, through which the swing link 3 passes. The swing track groove 1a restricts the movement trajectory of the swing link 3, thereby enabling the swing link 3 to drive the drive rod in the necking assembly 4 to move along the desired trajectory. In this embodiment, the swing cylinder is disposed on the upper surface of the mounting plate 1. The swing link 3 passes through the swing track groove 1a, with the upper end connected to the second connecting plate 7 and the lower end connected to the drive rod of the necking assembly 4. Optionally, a follower bearing 8 is provided on the swing link 3, which can move along the swing track groove 1a.

[0036] Optionally, this embodiment further provides a swing buffer limiter 9 on the mounting plate 1. The swing buffer limiter 9 is located on both sides of the first connecting plate 6 and can limit the swing range of the first connecting plate 6 so that the first connecting plate 6 can only rotate between the swing buffer limiters 9 on both sides thereof.

[0037] The necking assembly 4 is connected to the mounting plate 1 through the battery cell positioning assembly 5. The battery cell positioning assembly 5 of this embodiment includes a lifting cylinder 5-1 and a buffer spring 5-2. The buffer spring 5-2 is connected to the mounting plate 1. A necking assembly mounting plate 5-3 is set at the bottom of the buffer spring 5-2. The lifting cylinder 5-1 is set on the necking assembly mounting plate 5-3. The piston rod of the lifting cylinder is connected to the necking assembly 4, which can drive the necking assembly 4 to move up and down.

[0038] like Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, the necking assembly 4 of this embodiment includes a necking assembly base 4-1, a follower drive connector 4-2, a drive rod 4-3, a blade drive disc 4-4, a shaping blade 4-5, and a blade guide plate 4-6. The necking assembly base 4-1 is hollow and cylindrical, and the blade drive disc 4-4 and the shaping blade 4-5 are disposed within the necking assembly base 4-1. The blade drive disc 4-4 is rotatably disposed within the necking assembly base 4-1. In this embodiment, the blade drive disc 4-4 is disposed within the necking assembly base 4-1 via a deep groove ball bearing 4-7. The blade guide plate 4-6 is disposed at the bottom of the necking assembly base 4-1 and is fixedly connected to the necking assembly base 4-1.

[0039] The swing link 3 is connected to the follower drive connector 4-2, the follower drive connector 4-2 is connected to the drive rod 4-3, and the drive rod 4-3 is connected to the blade drive disk 4-4. When the swing cylinder drives the swing link 3 to move along the swing track groove 1a on the mounting plate 1, the swing link 3 drives the drive rod 4-3 to move in the circumferential direction through the follower drive connector 4-2 ( Figure 4 and Figure 8 The direction of the arrow in the figure is the moving direction of the driving rod 4-3). When the driving rod 4-3 moves, it drives the blade driving disc 4-4 to rotate.

[0040] The shaping blades 4-5 are connected to the blade drive disk 4-4. Rotation of the blade drive disk 4-4 drives the connected shaping blades 4-5. The bottom surface of the blade drive disk 4-4 is provided with blade chute 4-4a corresponding to the shaping blades 4-5. The shaping blades 4-5 are arranged adjacent to each other in a ring-like arrangement, similar to the arrangement of blades in an iris-type aperture. The swing track groove 1a is an arc-shaped groove, concentric with the ring formed by the shaping blades.

[0041] The blade guide plate 4-6 is provided with a through hole and a plurality of blade guide grooves 4-6a surrounding the through hole. One shaping blade 4-5 corresponds to one blade guide groove 4-6a. The size of the through hole is adapted to the size of the end of the battery cell. The end of the battery cell covered with the tape can pass through the through hole on the blade guide plate 4-6. Figure 5 and Figure 6 As shown, the shaping blade 4-5 is provided with a pin 4-8, one end of which extends into the blade guide groove 4-6a. The pin 4-8 can move along the blade guide groove 4-6a, and the shaping blade 4-5 can rotate around the pin 4-8. The shaping blade 4-5 has a protrusion 4-5a protruding from the blade surface. The protrusion 4-5a and the pin 4-8 are respectively located on two opposing surfaces of the shaping blade 4-5. The protrusion 4-5a is accommodated in the blade chute 4-4a. When the blade drive disk 4-4 drives the shaping blade 4-5 to move, the protrusion 4-5a moves in the blade chute 4-4a, thereby achieving circumferential movement of the shaping blade 4-5. During the rotation of the blade drive plate 4-4, the shaping blades 4-5 are driven by the blade guide slots 4-4a and 4-6a to move in a circular motion. Simultaneously, the shaping blades 4-5 move about the pin 4-8, thereby causing a circle of shaping blades 4-5 to open or close, similar to the opening / closing of an iris-type aperture. In this embodiment, the bottom of the blade drive plate 4-4 is provided with a slot / hole to accommodate a portion of the tape extending from the end of the battery cell. In other embodiments, when the blade guide plate 4-5 and the shaping blades 4-5 are sufficiently thick, or the length of the tape extending from the end of the battery cell is short, the slot / hole on the blade drive plate is not necessary.

[0042] Figure 4 and Figure 8 This is a schematic diagram of the shaping blades 4-5 when they are open. When the shaping blades 4-5 are open, the diameter of the circle formed by the shaping blades 4-5 is larger. Figure 9 and Figure 10 This is a schematic diagram of the shaping blades 4-5 shrinking. When the shaping blades 4-5 shrink, the diameter of the circle formed by the shaping blades 4-5 decreases, that is, the shaping blades move toward or away from the center during the process of moving along the circumference.

[0043] The present invention uses a shrinking assembly to shrink and smooth the tape wrapped around the end of the battery cell. The following describes the operation process of the shrinking and smoothing mechanism of the present invention:

[0044] When the battery cell is delivered to the station where the shrinking and smoothing mechanism is located, the battery cell positioning assembly 5 (lifting cylinder 5-1) controls the shrinking assembly 4 to move downward into position, and determines the depth of the end of the battery cell extending into the shrinking assembly 4. At this time, the end of the battery cell covered with the tape faces the shrinking assembly 4, and the part of the tape extending from the end face of the battery cell is located in the circle formed by the shaping blades 4-5. The upper surface of the insulating sheet 300 and the lower surface of the shaping blades 4-5 are basically flush, so that the shaping blades 4-5 can press the tape along the upper surface of the insulating sheet when shrinking; Figure 11 As shown, when the tape 100 is not subjected to the shrinkage and smoothing treatment, the tape 100 has a portion ( Figure 11 The insulating sheet 300 is attached to the end surface of the battery cell 200; at this time, the state of the shaping blade 4-5 is as follows Figure 4 and Figure 7 As shown, in the open state, the projection of the shaping blade 4-5 on the blade guide plate 4-6 is located at the periphery of the through hole of the blade guide plate 4-6;

[0045] After the battery cell is positioned, the swing drive unit 2 is activated, driving the swing link 3 to move along the swing track groove 1a. The swing link 3 drives the drive rod 4-3 to rotate along the circumference through the follower drive connector 4-2. The drive rod 4-3 drives the blade drive disk 4-4 to rotate. The blade drive disk 4-4 drives the shaping blade 4-5 to rotate around the pin 4-8 and move along the blade slide groove 4-4a at the same time. Under the guidance of the blade guide groove 4-6a, the shaping blade moves along the circumference while moving toward the center, thereby evenly flattening the portion of the tape 100 extending from the end of the battery cell on the surface of the insulating sheet (see Figure 12 ), at this time the state of the shaping leaves 4-5 is as follows Figure 9 and Figure 10 As shown, in the shrinking state, the projection of the shaping blade 4-5 on the blade guide plate 4-6 is located in the through hole of the blade guide plate 4-6. Since the insulating sheet 300 is completely covered by the adhesive tape 100, it is well fixed and will not fall off during the production process.

[0046] The necking assembly of the present invention is similar to an iris-type aperture structure. During the rotation of the blade drive disk, the blade guide groove performs trajectory coupling on the circular motion of the blade drive disk, causing the shaping blade to rotate and shrink, and the tape is uniformly shrunken while achieving the purpose of flattening. This embodiment uses a swing cylinder as the power driving source of the necking assembly. A slide rail is provided on the first connecting plate. The slide rail is track-coupled with the swing track groove to transform the torque force provided by the swing cylinder from being concentric with the swing cylinder to being concentric with the necking assembly, thereby realizing the rotation of the blade drive disk and finally realizing the contraction of the shaping blade. The multiple blades of the necking assembly move simultaneously, which can uniformly shrink and flatten the tape. The drive follower mechanism such as the connecting plate, swing connecting rod, follower drive connector, and drive rod will not get stuck due to the change in trajectory.

[0047] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A battery tape shrinkage smoothing mechanism, characterized in that: include: A mounting plate, on which a necking assembly and a swing driving unit providing driving force for the movement of the necking assembly are provided; The necking component comprises: Neck assembly base; A blade driving disk is rotatably arranged in the necking assembly base around the axis of the necking assembly base, and a blade sliding groove is provided on the blade driving disk; A plurality of shaping blades are provided in the base of the necking assembly and driven by the blade driving disk. The shaping blades are adjacent to each other and form a ring. The two side surfaces of the shaping blades are respectively provided with a pin shaft and a convex portion protruding from the surface of the blade. The convex portion is accommodated in the blade chute and can move along the blade chute; A blade guide plate is provided at the bottom of the base of the necking assembly, wherein the blade guide plate is provided with a through hole and a blade guide groove surrounding the through hole, and the pin extends into the blade guide groove and can move along the blade guide groove; a drive rod connected to the blade drive disc; The swing driving unit drives the driving rod to move along the circumference through a swing connecting rod, and the mounting plate is provided with a swing track groove, and the swing connecting rod moves along the swing track groove; When the swing drive unit controls the drive rod to move along the circumference, the shaping blade can be opened or shrunk. When the shaping blade is opened, the projection of the shaping blade on the blade guide plate is located outside the through hole. When the shaping blade is shrunk, the projection of the shaping blade on the blade guide plate is located inside the through hole.

2. The battery tape shrinkage smoothing mechanism according to claim 1, characterized in that: The blade driving disc is arranged in the necking component base through a deep groove ball bearing, and the blade guide plate is fixedly connected to the necking component base.

3. The battery tape shrinkage smoothing mechanism according to claim 1, characterized in that: The swing drive unit is a swing cylinder, which is arranged on the mounting plate; the output shaft of the swing cylinder is connected to the first connecting plate, a slide rail is provided on the first connecting plate, a second connecting plate is provided on the slide rail, the second connecting plate can move along the slide rail, and the second connecting plate is connected to the swing connecting rod; the extension direction of the slide rail is the radial direction of the circle formed when the first connecting plate rotates around the output shaft of the swing cylinder, and the output shaft of the swing cylinder is parallel to the axial direction of the swing connecting rod.

4. The battery tape shrinkage smoothing mechanism according to claim 3, characterized in that: The swing cylinder is arranged on the upper surface of the mounting plate, the necking assembly is located below the mounting plate, the swing track groove is a through groove, the swing connecting rod passes through the swing track groove, the upper end is connected to the second connecting plate, and the lower end is connected to the driving rod.

5. The battery tape shrinkage smoothing mechanism according to claim 4, characterized in that: The swing link is provided with a follower bearing, and the follower bearing can move along the swing track groove; the swing link is connected to the drive rod through a follower drive connecting piece.

6. The battery tape shrinkage smoothing mechanism according to claim 3, characterized in that: The mounting plate is provided with swing buffer limiters located on both sides of the first connecting plate, and the first connecting plate rotates between the swing buffer limiters.

7. The battery tape shrinkage smoothing mechanism according to claim 1, characterized in that: The mounting plate is provided with a battery core positioning assembly, and the necking assembly is connected to the battery core positioning assembly and can move up and down under the control of the battery core positioning assembly.

8. The battery tape shrinkage smoothing mechanism according to claim 7, characterized in that: The battery cell positioning component is a lifting cylinder, and the piston rod of the lifting cylinder is connected to the necking component.

9. The battery tape shrinkage smoothing mechanism according to claim 8, characterized in that: The battery cell positioning assembly further includes a buffer spring, which is connected to the mounting plate. A necking assembly mounting plate is provided at the bottom of the buffer spring, and the lifting cylinder is provided on the necking assembly mounting plate.

10. The battery tape shrinkage smoothing mechanism according to claim 1, characterized in that: The swing track groove is an arc-shaped groove, and the arc-shaped groove and the ring formed by the shaping blade are concentric.

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