Transfer cabinet fixing connecting rod

Abstract

The utility model provides a fixing connecting rod of a transfer cabinet. The fixing connecting rod comprises a supporting rod, supporting assemblies and a control assembly, wherein the supporting rod is used for placing pole piece coiled materials; the supporting assemblies are arranged on the two sides of the supporting rod and used for supporting the pole piece coiled materials from the side faces; the supporting rod is cylindrical, the far end of the supporting rod is connected with the transfer cabinet, and the pole piece coiled material can be placed on the supporting rod from the near end of the supporting rod; the supporting assembly comprises a connecting rod hinged to the supporting rod and a supporting plate arranged on the connecting rod, and the supporting plate can make contact with the pole piece coiled material to play a role in stabilizing the pole piece coiled material; by means of the fixing connecting rod of the transfer cabinet, the pole piece coiled materials can be stabilized from the two sides of the supporting rod, the pole piece coiled materials are prevented from shaking when transferred, and the pole piece coiled materials are stably placed.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production equipment, and more specifically relates to a fixed connecting rod for a transfer cabinet. Background Art

[0002] Some raw materials for lithium battery electrode sheets have certain requirements for the environment during storage and transportation. For example, graphite or silicon-based materials are sensitive to humidity in the air and need to be stored and transported in a dry environment to avoid performance degradation. For this scenario, the existing technology provides a variety of constant temperature and humidity chambers.

[0003] However, some existing constant temperature and humidity chambers have a rod fixed in the horizontal direction, on which the electrode coil is placed to fix it. However, such a fixing method will inevitably cause shaking during the handling or transportation of the transfer cabinet, and shaking may cause collisions, which may damage the electrode raw materials or reduce the quality of the materials, affecting the yield rate. Utility Model Content

[0004] One object of the utility model is to provide a transfer cabinet fixing connecting rod, which is used to stably place the electrode coil and prevent the electrode coil from shaking when transferring the electrode coil, including a support rod for placing the electrode coil, a support assembly arranged on both sides of the support rod for supporting the electrode coil from the side, and a control assembly for controlling the opening and retraction of the support assembly;

[0005] The support rod is cylindrical, and the distal end of the support rod is connected to the transfer cabinet, and the electrode coil can be placed on the support rod from the proximal end of the support rod; the support assembly includes a connecting rod hinged to the support rod and a support plate arranged on the connecting rod, and the support plate can contact with the electrode coil to stabilize the electrode coil; the control assembly is connected to the connecting rod to control the opening and retraction of the support plate.

[0006] Preferably, the support rod comprises a support outer shell and a support inner shell which are sleeved together, and a plurality of rollers are connected to the support inner shell, and the plurality of rollers are arranged along the axis of the support rod;

[0007] A rotating wheel hole is arranged on the supporting outer shell, and a part of the roller extends out of the outer surface of the supporting outer shell from the rotating wheel hole; an end cover is arranged at the proximal end of the supporting rod, and the end cover is connected to the supporting rod through a fastener.

[0008] Preferably, the support assembly further comprises a bonding plate, the bonding plate is fixedly connected to the inner surface of the support outer shell, the bonding plate is connected to the connecting rod via a first hinge portion, and the connecting rod can rotate around the first hinge portion;

[0009] The connecting rod is connected to the support plate via a second hinge portion, and the support plate can rotate around the second hinge portion;

[0010] The second hinged portion of the connecting rod is arranged at the proximal end of the connecting rod, the distal end of the connecting rod is connected to the control assembly, and the first hinged portion of the connecting rod is arranged at a position between the proximal end and the distal end.

[0011] Preferably, the bonding plate comprises a bonding portion and a bending portion, the bonding portion is manufactured to be shaped to be able to fit with the inner contour of the supporting outer shell, and the bending portion enables the bonding plate to open a bending groove in a direction away from the supporting outer shell;

[0012] The first hinge portion is arranged on the side of the bending groove, the width of the bending groove is greater than the thickness of the connecting rod, and a part of the connecting rod can be rotated into the bending groove;

[0013] An opening for the connecting rod to pass through is arranged at the bottom of the bending groove, and the length of the opening at the bottom of the bending groove is greater than the width of the connecting rod.

[0014] Preferably, the control assembly includes a control rod passing through the connecting rod, a control ring arranged on the control rod and capable of pushing the connecting rod, and a driving unit for pushing and pulling the control rod to reciprocate;

[0015] The connecting rod is provided with a waist-shaped hole for the control rod to pass through, and the control ring is arranged on both sides of the waist-shaped hole;

[0016] The driving unit can push and pull the control rod to reciprocate along the axial direction of the support rod. During the reciprocating movement of the control rod, the control ring can push the connecting rod to rotate, thereby driving the support plate to move toward or away from the support rod.

[0017] Preferably, the driving unit comprises an externally threaded rod disposed at the proximal end of the control rod and an internally threaded rod matching the externally threaded rod;

[0018] The driving unit also includes a square hole bracket and a round hole bracket. A square rod is arranged between the external threaded rod and the control rod. The square rod passes through the square hole bracket. The square hole bracket is used to limit the square rod to move but not rotate; the internal thread passes through the round hole bracket. A groove is arranged at the connection part between the internal threaded rod and the round hole bracket. The round hole bracket and the groove can limit the internal threaded rod to rotate but not move.

[0019] Preferably, a set of support components is respectively arranged on both sides of the support rod, a synchronization rod is arranged between the control rods of the two sets of support components, and the driving unit is arranged on one set of support components; the synchronization rod is used to enable a driving unit to notify and control the support components on both sides of the support rod.

[0020] Preferably, a friction layer is provided on the outer surface of the support plate, and the friction layer is used to increase the friction between the support plate and the inner wall of the pole piece coil.

[0021] Preferably, a latch is provided at the proximal end of the support rod, and the latch is used to limit the position of the pole sheet coil to prevent the pole sheet coil from falling off the support rod.

[0022] As described above, a fixed connecting rod of a transfer cabinet of the utility model can stabilize the electrode coil from both sides of the support rod, prevent the electrode coil from shaking when transferring the electrode coil, and stably place the electrode coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be more fully understood through the following detailed description in conjunction with the accompanying drawings, in which like elements are numbered in a similar manner, wherein:

[0024] Figure 1 This is a diagram of the use state of a fixed connecting rod of a transfer cabinet according to an embodiment of the utility model;

[0025] Figure 2 This is a structural diagram of a fixed connecting rod of a transfer cabinet according to an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of a fixed connecting rod support assembly of a transfer cabinet according to an embodiment of the utility model;

[0027] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0028] Figure 5 It is a cross-sectional view of a fixed connecting rod of a transfer cabinet in use state according to an embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of a fixed connecting rod driving unit of a transfer cabinet in an embodiment of the utility model;

[0030] In the figure: pole piece coil 1, support rod 21, transfer cabinet 22, support outer shell 23, support inner shell 24, connecting rod 31, support plate 32, bonding plate 33, bending groove 34, roller 41, end cover 42, connecting shaft 43, first hinge part 51, second hinge part 52, control rod 61, control ring 62, external threaded rod 63, internal threaded rod 64, square hole bracket 65, round hole bracket 66, square rod 67, hexagonal head 68, synchronization rod 69, friction layer 71, latch 72. DETAILED DESCRIPTION

[0031] The technical solution of the utility model is further described in detail below through embodiments and in combination with the accompanying drawings, but the utility model is not limited to the following embodiments.

[0032] Some raw materials for lithium battery electrode sheets have certain requirements for the environment during storage and transportation. For example, graphite or silicon-based materials are sensitive to humidity in the air and need to be stored and transported in a dry environment to avoid performance degradation. For this scenario, the existing technology provides a variety of constant temperature and humidity chambers.

[0033] However, some existing constant temperature and humidity chambers have a rod fixed in the horizontal direction, and the electrode coil 1 is placed on the rod to fix it. However, such a fixing method will inevitably cause shaking when the transfer cabinet 22 is transported or transported, and the shaking may cause collisions, which may damage the electrode raw materials or reduce the quality of the materials, affecting the yield rate.

[0034] In order to solve the above problems, the present embodiment provides a transfer cabinet 22 fixing connecting rod, which is used to stably place the electrode coil 1 to prevent the electrode coil 1 from shaking when transferring the electrode coil 1, including a support rod 21 for placing the electrode coil 1, a support assembly arranged on both sides of the support rod 21 for supporting the electrode coil 1 from the side, and a control assembly for controlling the opening and retraction of the support assembly;

[0035] The support rod 21 is cylindrical, and the distal end of the support rod 21 is connected to the transfer cabinet 22, and the electrode coil 1 can be placed on the support rod 21 from the proximal end of the support rod 21; the support assembly includes a connecting rod 31 hinged to the support rod 21 and a support plate 32 arranged on the connecting rod 31, and the support plate 32 can contact with the electrode coil 1 to stabilize the electrode coil 1; the control assembly is connected to the connecting rod 31 to control the opening and retraction of the support plate 32.

[0036] In this embodiment, Figure 1 As shown, the transfer cabinet 22 can house multiple electrode coils 1, and the distal end of the support rod 21 is fixed on the cabinet body of the transfer cabinet 22. The support rod 21 of this embodiment is connected to the box body of the transfer cabinet 22 through a flange, and the support rod 21 extends toward the cabinet door of the transfer cabinet 22, and the proximal end of the support rod 21 is close to the cabinet door.

[0037] A support rod 21 is provided in the transfer cabinet 22 of the present embodiment, and one or more electrode sheet coils 1 can be placed on each support rod 21. The electrode sheet coils 1 are obtained by pre-cutting the electrode sheet raw materials, cutting them into smaller sizes, and then winding the cut electrode sheet raw materials onto rollers.

[0038] When placing the pole sheet coil 1 on the support rod 21 , a forklift can be used to insert a hollow roller into the support rod 21 , and then the pole sheet coil 1 is pushed toward the far end of the support rod 21 , so that the pole sheet coil 1 is firmly placed on the support rod 21 .

[0039] The support plate 32 is used to support the pole piece coil 1 on the side of the support rod 21 to prevent it from shaking. The connecting rod 31 is used to connect the support rod 21 and the support plate 32. The connecting rod 31 can be a movable connecting rod structure.

[0040] The control component is used to control the connecting rod 31, retract the support plate 32 before placing the pole sheet coil 1 on the support rod 21, and control the support plate 32 to open after the pole sheet coil 1 is placed in place.

[0041] Furthermore, the support rod 21 includes a support outer shell 23 and a support inner shell 24 which are sleeved together, and a plurality of rollers 41 are connected to the support inner shell 24, and the plurality of rollers 41 are arranged along the axis of the support rod 21;

[0042] A rotating wheel hole is provided on the supporting outer shell 23, and a part of the roller 41 extends out of the outer surface of the supporting outer shell 23 from the rotating wheel hole; an end cover 42 is provided at the proximal end of the supporting rod 21, and the end cover 42 is connected to the supporting rod 21 through a fastener.

[0043] In this embodiment, Figure 2 , Figure 3 and Figure 5 As shown, the roller 41 is used to reduce the friction between the pole piece coil 1 and the support rod 21, so that the pole piece coil 1 can be pushed to a position close to the far end of the support rod 21 more smoothly.

[0044] The roller 41 of this embodiment may be a bearing. The roller 41 may be arranged on the upper end of the supporting inner shell 24 via a connecting shaft 43. An insert may be arranged on the connecting shaft 43 to prevent the connecting shaft 43 from falling off.

[0045] like Figure 3 As shown, a plurality of rollers 41 are arranged in the direction of the axis of the support rod 21 , and the weight of the pole piece coil 1 can be supported by the rollers 41 , and finally the force is borne by the supporting inner shell 24 .

[0046] A step is provided at the connection portion between the end cover 42 and the supporting outer shell 23, and the step is used to optimize the force on the supporting outer shell 23 and prevent deformation.

[0047] Furthermore, the support assembly further includes a bonding plate 33, the bonding plate 33 is fixedly connected to the inner surface of the support outer shell 23, the bonding plate 33 is connected to the connecting rod 31 through a first hinge portion 51, and the connecting rod 31 can rotate around the first hinge portion 51;

[0048] The connecting rod 31 is connected to the support plate 32 via a second hinge portion 52, and the support plate 32 can rotate around the second hinge portion 52;

[0049] The second hinged portion 52 of the connecting rod 31 is disposed at the proximal end of the connecting rod 31 , the distal end of the connecting rod 31 is connected to the control assembly, and the first hinged portion 51 of the connecting rod 31 is disposed at a position between the proximal end and the distal end.

[0050] In this embodiment, Figure 3 , Figure 5 as well as Figure 6As shown, the bonding plate 33 is used to connect the support assembly with the support rod 21. The bonding plate 33 of this embodiment is a metal sheet metal part, which is bent into an arc that matches the inner wall of the support outer shell 23. The support outer shell 23 is a hollow shell, which is a hollow cylinder in this embodiment.

[0051] The connection between the bonding plate 33 and the supporting outer shell 23 can be welded, riveted or connected by fasteners.

[0052] The connecting rod 31 is hinged to the bonding plate 33, and the connecting rod 31 can rotate around the bonding plate 33. When the connecting rod 31 rotates in a direction in which the relative angle with the bonding plate 33 increases, the supporting plate 32 moves toward the direction close to the electrode sheet coil 1; otherwise, it moves away from the electrode sheet coil 1.

[0053] In this embodiment, the first hinge part 51 and the second hinge part 52 are rotating shafts.

[0054] Furthermore, the bonding plate 33 includes a bonding portion and a bending portion. The bonding portion is made into a shape that can be bonded to the inner contour of the supporting outer shell 23. The bending portion enables the bonding plate 33 to open a bending groove 34 in a direction away from the supporting outer shell 23.

[0055] The first hinge portion 51 is disposed on the side of the bending groove 34 . The width of the bending groove 34 is greater than the thickness of the connecting rod 31 . A portion of the connecting rod 31 can be rotated into the bending groove 34 .

[0056] The bottom of the bending groove 34 is provided with an opening for the connecting rod 31 to pass through, and the length of the opening at the bottom of the bending groove 34 is greater than the width of the connecting rod 31 .

[0057] In this embodiment, Figure 6 As shown, the fitting portion is used to connect and support the outer shell 23 , and the bent portion is used to accommodate the connecting rod 31 rotated into the fitting plate 33 .

[0058] Further, the control assembly includes a control rod 61 passing through the connecting rod 31, a control ring 62 disposed on the control rod 61 and capable of pushing the connecting rod 31, and a driving unit for pushing and pulling the control rod 61 to reciprocate;

[0059] The connecting rod 31 is provided with a waist-shaped hole for the control rod 61 to pass through, and the control ring 62 is provided on both sides of the waist-shaped hole;

[0060] The driving unit can push and pull the control rod 61 to reciprocate along the axial direction of the support rod 21. During the reciprocating movement of the control rod 61, the control ring 62 can push the connecting rod 31 to rotate, thereby driving the support plate 32 to move toward or away from the support rod 21.

[0061] In this embodiment, Figure 4As shown, a plurality of support assemblies are axially arranged on the support rod 21 , each support assembly is provided with a connecting rod 31 , a control rod 61 passes through these connecting rods 31 , a control ring 62 is fixed on the control rod 61 , and a control ring 62 is provided on both sides of each connecting rod 31 .

[0062] When the control rod 61 moves, the control ring 62 contacts the side wall of the waist-shaped hole, pushing the connecting rod 31 to rotate around the first hinge part 51. Since the connecting rod 31 can rotate, the waist-shaped hole provides space for the connecting rod 31 to rotate. When the connecting rod 31 rotates, the control rod 61 moves relatively in the waist-shaped hole.

[0063] Further, the driving unit includes an external threaded rod 63 disposed at the proximal end of the control rod 61 and an internal threaded rod 64 matching the external threaded rod 63;

[0064] The driving unit also includes a square hole bracket 65 and a round hole bracket 66. A square rod 67 is arranged between the external threaded rod 63 and the control rod 61. The square rod 67 passes through the square hole bracket 65. The square hole bracket 65 is used to limit the square rod 67 from being able to move but not rotate; the internal thread passes through the round hole bracket 66. A groove is arranged at the connecting part of the internal threaded rod 64 and the round hole bracket 66. The round hole bracket 66 and the groove can limit the internal threaded rod 64 from being able to rotate but not move.

[0065] In this embodiment, Figure 6 As shown, the driving unit is used to drive the control rod 61 to translate, the external threaded rod 63 is arranged at the proximal end of the control rod 61, and the internal threaded rod 64 matches the external threaded rod 63. Rotating the internal threaded rod 64 can make the internal threaded rod 64 and the external thread relatively extend or shorten, thereby moving the control rod 61.

[0066] The square hole bracket 65 and the round hole bracket 66 are fixed at the bottom of the bonding plate 33. The square rod 67 can move in the square hole bracket 65 but cannot rotate. When the internal threaded rod 64 is rotated, the square rod 67 and the square hole bracket 65 can prevent the external threaded rod 63 from rotating accordingly.

[0067] The round hole bracket 66 and the groove are used to prevent the internal threaded rod 64 from translating when the internal threaded rod 64 is rotated.

[0068] Preferably, a hexagonal head 68 is provided at the end of the internal threaded rod 64 away from the external threaded rod 63 , and the hexagonal head passes through the end cap 42 , so as to facilitate the rotation of the internal threaded rod 64 by operating a tool.

[0069] Furthermore, a set of support components is respectively arranged on both sides of the support rod 21, a synchronization rod 69 is arranged between the control rods 61 of the two sets of support components, and the driving unit is arranged on one set of support components; the synchronization rod 69 is used to enable a driving unit to notify and control the support components on both sides of the support rod 21.

[0070] In this embodiment, Figure 4 and Figure 5 As shown, the synchronization rod 69 is used to connect the control rods 61 of the support assembly on both sides of the support rod 21. When the driving unit drives one control rod 61 to move, the synchronization rod 69 drives the other control rod 61 to move.

[0071] Furthermore, a friction layer 71 is provided on the outer surface of the support plate 32 , and the friction layer 71 is used to increase the friction between the support plate 32 and the inner wall of the pole piece coil 1 .

[0072] In this embodiment, the friction layer 71 can be a material with high friction such as rubber. The friction layer 71 is used to increase the friction between the support plate 32 and the inner wall of the pole piece coil 1 to prevent the pole piece coil 1 from sliding.

[0073] Furthermore, a latch 72 is provided at the proximal end of the support rod 21 , and the latch 72 is used to limit the position of the pole sheet coil 1 to prevent the pole sheet coil 1 from falling off the support rod 21 .

[0074] In this embodiment, Figure 2 , Figure 3 As shown, the latch 72 passes through the supporting outer shell 23 and the supporting inner shell 24, and the supporting outer shell 23 and the supporting inner shell 24 are provided with latch holes 72; before placing the pole sheet coil 1 on the supporting rod 21, remove the latch 72; after placing the pole sheet coil 1 on the supporting rod 21, insert the latch 72 to prevent the pole sheet coil 1 from falling off.

[0075] The various embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and the scope of the present utility model is not limited to the above embodiments. Without departing from the spirit and scope of the present utility model, many modifications and changes are obvious to those of ordinary skill in the art. In other words, those of ordinary skill in the art can make various changes and improvements to the present utility model in form and detail, and these are considered to fall within the scope of protection of the present utility model. The choice of terms used in this article is intended to best explain the principles of the various embodiments, practical applications, or improvements to the technology in the market, or to enable those of ordinary skill in the art to understand the various embodiments disclosed herein.

Claims

1. A fixed connecting rod of a transfer cabinet, used for stably placing a pole sheet coil (1) to prevent the pole sheet coil (1) from shaking when transferring the pole sheet coil (1), characterized in that: It comprises a support rod (21) for placing a pole sheet coil (1), support components arranged on both sides of the support rod (21) for supporting the pole sheet coil (1) from the side, and a control component for controlling the expansion and retraction of the support component; The support rod (21) is cylindrical, the distal end of the support rod (21) is connected to the transfer cabinet (22), and the electrode coil (1) can be placed on the support rod (21) from the proximal end of the support rod (21); the support assembly comprises a connecting rod (31) hinged to the support rod (21) and a support plate (32) arranged on the connecting rod (31), the support plate (32) can contact with the electrode coil (1) to stabilize the electrode coil (1); the control assembly is connected to the connecting rod (31) to control the opening and retraction of the support plate (32); The support rod (21) comprises a support outer shell (23) and a support inner shell (24) which are sleeved together, and a plurality of rollers are connected to the support inner shell (24), and the plurality of rollers are arranged along the axis of the support rod (21); A rotating wheel hole is provided on the supporting outer shell (23), and a part of the roller protrudes from the rotating wheel hole to the outer surface of the supporting outer shell (23); an end cover (42) is provided at the proximal end of the supporting rod (21), and the end cover (42) is connected to the supporting rod (21) via a fastener.

2. A transfer cabinet fixing connecting rod according to claim 1, characterized in that: The support assembly further comprises a bonding plate (33), wherein the bonding plate (33) is fixedly connected to the inner surface of the support outer shell (23), the bonding plate (33) is connected to the connecting rod (31) via a first hinge portion (51), and the connecting rod (31) is capable of rotating around the first hinge portion (51); The connecting rod (31) and the supporting plate (32) are connected via a second hinge portion (52), and the supporting plate (32) can rotate around the second hinge portion (52); The second hinged portion (52) of the connecting rod (31) is arranged at the proximal end of the connecting rod (31), the distal end of the connecting rod (31) is connected to the control assembly, and the first hinged portion (51) of the connecting rod (31) is arranged at a position between the proximal end and the distal end.

3. A transfer cabinet fixing connecting rod according to claim 2, characterized in that: The bonding plate (33) comprises a bonding portion and a bending portion, wherein the bonding portion is manufactured to be shaped to be able to be bonded to the inner contour of the supporting outer shell (23), and the bending portion enables the bonding plate (33) to have a bending groove (34) in a direction away from the supporting outer shell (23); The first hinge portion (51) is arranged on a side of the bending groove (34); the width of the bending groove (34) is greater than the thickness of the connecting rod (31); a portion of the connecting rod (31) can be rotated into the bending groove (34); An opening is provided at the bottom of the bending groove (34) for the connecting rod (31) to pass through, and the length of the opening at the bottom of the bending groove (34) is greater than the width of the connecting rod (31).

4. The fixed connecting rod of a transfer cabinet according to claim 1, characterized in that: The control assembly comprises a control rod (61) passing through the connecting rod (31), a control ring (62) arranged on the control rod (61) and capable of pushing the connecting rod (31), and a driving unit for pushing and pulling the control rod (61) to reciprocate; The connecting rod (31) is provided with a waist-shaped hole for the control rod (61) to pass through, and the control rings (62) are arranged on both sides of the waist-shaped hole; The driving unit can push and pull the control rod (61) to reciprocate along the axial direction of the support rod (21); during the reciprocating movement of the control rod (61), the control ring (62) can push the connecting rod (31) to rotate, thereby driving the support plate (32) to move in a direction close to the support rod (21) or away from the support rod (21).

5. A transfer cabinet fixing connecting rod according to claim 4, characterized in that: The driving unit comprises an externally threaded rod (63) arranged at the proximal end of the control rod (61) and an internally threaded rod (64) matching the externally threaded rod (63); The driving unit further comprises a square hole bracket (65) and a round hole bracket (66); a square rod (67) is arranged between the external threaded rod (63) and the control rod (61); the square rod (67) passes through the square hole bracket (65); the square hole bracket (65) is used to restrict the square rod (67) to be able to move but not to rotate; the internal thread passes through the round hole bracket (66); a groove is arranged at the connection part between the internal threaded rod (64) and the round hole bracket (66); the round hole bracket (66) and the groove can restrict the internal threaded rod (64) to be able to rotate but not to move.

6. A transfer cabinet fixing connecting rod according to claim 4, characterized in that: A set of support components is respectively arranged on both sides of the support rod (21), a synchronization rod (69) is arranged between the control rods (61) of the two sets of support components, and the driving unit is arranged on one set of support components; the synchronization rod (69) is used to enable a driving unit to notify the support components on both sides of the control support rod (21).

7. The fixed connecting rod of the transfer cabinet according to claim 1, characterized in that: The outer surface of the support plate (32) is provided with a friction layer (71), and the friction layer (71) is used to increase the friction force between the support plate (32) and the inner wall of the pole piece coil (1).

8. The fixed connecting rod of a transfer cabinet according to claim 1, characterized in that: A latch (72) is provided at the proximal end of the support rod (21), and the latch (72) is used to limit the position of the pole sheet coil (1) to prevent the pole sheet coil (1) from falling off the support rod (21).

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