Novel tab cutting mechanism for winding machine

Abstract

The utility model discloses a novel pole lug cutting mechanism for a winding machine. The novel pole lug cutting mechanism comprises a base, a detachable cutter mechanism, a cutter lifting mechanism and a pole lug pressing block mechanism. The detachable cutter mechanism comprises a cutter base, a lower cutter and an upper cutter structure; the cutter base is detachably mounted on the base, and the lower cutter is mounted at the top end of the cutter base; a lifting part of the cutter lifting mechanism is detachably connected with the upper cutter structure, the upper cutter structure is located above the cutter base, and the cutter lifting mechanism drives the upper cutter structure to be close to or away from the lower cutter; the tab pressing block mechanism comprises a tab pressing block and a tab pressing block lifting structure; a lifting part of the tab pressing block lifting structure is connected with the tab pressing block; and a flattening part of the tab pressing block is positioned between the lower cutter and the upper cutter structure. According to the utility model, the cutter mechanism and the tab pressing block are arranged into a split structure, only the cutter mechanism needs to be detached when the cutter is replaced, the number of detached parts is small, and the occlusion mode of the upper cutter and the lower cutter is changed.

Description

Technical Field

[0001] This utility model belongs to the field of battery core manufacturing, specifically relating to a novel tab cutting mechanism for a winding machine. Background Technology

[0002] Generally, the tabs of a battery cell are cut into sections from a whole roll of material according to the required length by a tab cutting mechanism. Because the existing tab cutting mechanism has a lower blade locked with a screw, and the upper blade's fixing hole is relatively large, allowing the upper blade to swing at a certain angle, and then the upper blade is directly pressed by two springs to engage with the lower blade, when the elasticity of the two springs is uneven or the lower blade is skewed, gaps will appear when the upper and lower blades are engaged, resulting in uneven tab cutting or cutting burrs. On the other hand, all the parts of the existing tab cutting mechanism are assembled on a blade holder. When changing the cutter, the entire blade holder and the parts on the blade holder need to be disassembled together. There are many parts to disassemble, and the space for blade alignment is small. Blade alignment relies entirely on pushing with fingers and observing with the naked eye, which easily leads to uneven force when the upper and lower blades are engaged.

[0003] If the force is uneven during the cutting process, the cutter wears faster, leading to poor cutting before the cutter reaches its service life. Poorly cut tabs can easily puncture the electrode sheets, causing overheating and fire. Poor tab cutting is not visible to the naked eye; by the time the problem is discovered, a large batch of cells may have already been produced, resulting in batch anomalies and significant waste. Therefore, optimizing the tab cutting mechanism is urgently needed. Utility Model Content

[0004] In view of the shortcomings described in the prior art, this utility model provides a novel tab cutting mechanism for a winding machine.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A novel tab cutting mechanism for a winding machine includes a base, a detachable cutting mechanism, a cutting lifting mechanism, and a tab pressing block mechanism. The detachable cutting mechanism includes a cutting base, a lower cutting blade, and an upper cutting blade structure. The cutting base is detachably mounted on the base, and the lower cutting blade is mounted on the top of the cutting base. The cutting lifting mechanism is mounted on the base, and its lifting part is detachably connected to the upper cutting blade structure, which is located above the cutting base. The cutting lifting mechanism moves the upper cutting blade structure closer to or further away from the lower cutting blade. The tab pressing block mechanism includes a tab pressing block and a tab pressing block lifting structure, with the lifting structure parallel to the cutting lifting mechanism. The lifting part of the tab pressing block lifting structure is connected to the tab pressing block, and the flattening part of the tab pressing block is located between the lower and upper cutting blade structures. When replacing the cutting blade, the detachable cutting mechanism can be removed separately from the base. Furthermore, by treating the tab pressing block and the cutting mechanism as separate, unconnected structures, the blade adjustment space is increased.

[0007] In a preferred embodiment of this utility model, the upper cutter structure includes an upper cutter fixing base plate, an upper cutter rotating mounting block, an upper cutter rotating shaft, a spring, a rotating shaft fixing block, and an upper cutter; the upper cutter fixing base plate is detachably connected to the lifting part of the cutter lifting mechanism; an upper cutter rotating shaft is installed on the end of the upper cutter fixing base plate near the lower cutter, the end of the upper cutter rotating shaft passes through the rotating shaft fixing block, and the rotating shaft fixing block is fixed on the upper cutter fixing base plate; an upper cutter rotating mounting block is installed on the upper cutter rotating shaft, and the upper cutter rotating mounting block rotates around the upper cutter rotating shaft; a spring is provided between the upper cutter rotating mounting block and the upper cutter fixing base plate, and an upper cutter is detachably installed on the end face of the upper cutter rotating mounting block away from the upper cutter fixing base plate; an extension guide portion is provided on the lower end face of the upper cutter, and the extension guide portion is tightly attached to the outer wall of the lower cutter under the action of the spring; the cutting edge of the upper cutter corresponds to the cutting edge of the lower cutter. The upper cutter is pressed against the lower cutter by a spring that can only rotate along the upper cutter's rotation axis. This avoids the problem of inconsistent spring force that can cause gaps between the upper and lower cutters in existing vertical spring pressing methods. Furthermore, the extended guide section occupies only a small part of the upper cutter, which mainly ensures that the upper cutter is subjected to a force opposite to the spring's elastic force. It also serves as a guide for the upper and lower cutters to mesh, ensuring accurate meshing of the upper and lower cutters during cutting.

[0008] In a preferred embodiment of this invention, an upper cutter movement limiting rod is installed on the cutter base, and a limiting stop is installed at the end of the upper cutter movement limiting rod that passes through the upper cutter fixing base plate. The cutter lifting mechanism drives the upper cutter structure to move closer to or away from the lower cutter along the upper cutter movement limiting rod. The upper cutter movement limiting rod can limit the movement stroke of the upper cutter, preventing the upper cutter from being deformed by the upper cutter rotating mounting block pressing on the electrode tab pressure block due to excessive downward pressure distance driven by the cutter lifting cylinder.

[0009] In a preferred embodiment of this invention, an upper cutter moving guide rod is further installed between the cutter base and the cutter fixing base. The cutter base is provided with a moving guide rod mounting hole, and the upper cutter moving guide rod is installed into the moving guide rod mounting hole through a linear ball bushing (LBUW). The upper end of the upper cutter moving guide rod passes upward through the cutter fixing base, so that the upper cutter structure slides along the upper cutter moving guide rod during its up-and-down movement, ensuring the linearity of the movement of the upper cutter structure.

[0010] In a preferred embodiment of this invention, a lower cutter adjustment plate is provided on the cutter base at a position corresponding to the end of the lower cutter away from the upper cutter structure. The lower cutter adjustment plate is provided with a threaded hole, and an adjusting screw is threadedly connected to the threaded hole and abuts against the lower cutter. The adjusting screw is set in a horizontal direction. By adjusting the clamping distance between the adjusting screw and the lower cutter, the installation position of the lower cutter on the cutter base can be adjusted to achieve engagement with the upper cutter. Furthermore, when replacing the lower cutter, the clamping position is adjusted by adjusting the adjusting screw, avoiding blade tilting caused by manually clamping the cutter.

[0011] In a preferred embodiment of this invention, the cutter base has a U-shaped groove below the lower cutter, and a lower cutter fixing hole is provided on the side wall of the U-shaped groove. The U-shaped groove facilitates the disassembly and installation of the lower cutter, and a connecting structure can be set within the U-shaped groove, minimizing the number of connecting parts for fixing the cutter base above it. This effectively increases the adjustment distance of the lower cutter and improves the number of times the lower cutter can be repaired and reused.

[0012] In a preferred embodiment of this invention, the electrode tab clamping block is a U-shaped clamping block, with the flattened portion of the U-shaped clamping block located between the lower cutter and the upper cutter rotating mounting block; the portion of the U-shaped clamping block parallel to the flattened portion is located above the cutter fixing base plate. The opening direction of the U-shaped clamping block is the disassembly direction of the detachable cutter mechanism. Furthermore, separating the electrode tab clamping block from the upper and lower cutters increases the operable space for blade setting.

[0013] This invention sets the cutting mechanism and the electrode clamping block as separate structures. When replacing the cutting blade, only the cutting mechanism needs to be disassembled. There are fewer disassembled parts, making disassembly convenient and simple. In addition, the space provided by the electrode clamping block is used for blade alignment. Furthermore, the engagement method of the upper and lower cutting blades has been changed. In this invention, the upper cutting blade is pressed against the lower cutting blade by a spring that can only rotate along the upper cutting blade's rotation axis, avoiding gaps between the upper and lower cutting blades caused by different spring forces. The lower cutting blade is tightened with a set screw to prevent tilting of the lower cutting blade caused by manually pressing it. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2.

[0017] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0018] Figure 4 This is an assembly diagram of the cutter base and the upper cutter structure (with some parts omitted) of this utility model.

[0019] Figure 5 This is a side view of the cutter base and the upper cutter structure (with some parts omitted) of this utility model.

[0020] Figure 6 This is a schematic diagram of the electrode clamping block mechanism of this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example:

[0023] A novel tab cutting mechanism for winding machines, such as Figure 1 As shown, it includes a base 1, a detachable cutter mechanism 2, a cutter lifting mechanism 3, and an electrode clamping block mechanism 4.

[0024] like Figure 1-5 As shown, the detachable cutter mechanism 2 includes a cutter base 201, a lower cutter 202, and an upper cutter structure; the cutter base 201 is detachably mounted on the base 1, and in this embodiment, it is fixed by pins and screws, and the lower cutter 202 is mounted on the top of the cutter base 201.

[0025] Furthermore, a lower cutter adjustment plate 206 is provided on the cutter base 201 at a position corresponding to the end of the lower cutter 202 away from the upper cutter structure. The lower cutter adjustment plate 206 is provided with a threaded hole, and an adjusting screw is threadedly connected to the threaded hole and abuts against the lower cutter. The adjusting screw is set in a horizontal direction. By adjusting the clamping distance between the adjusting screw and the lower cutter, the installation position of the lower cutter on the cutter base can be adjusted to achieve engagement with the upper cutter. When replacing the lower cutter, the clamping position is adjusted by adjusting the adjusting screw, avoiding blade tilting caused by manually clamping the blade.

[0026] The bottom surface of the lower cutter 202, which contacts the cutter base, is provided with fixing screw holes. The cutter base 201 has a U-shaped groove below the lower cutter, and a lower cutter fixing hole is provided on the side wall of the U-shaped groove. The lower cutter fixing screw passes through the lower cutter fixing hole and extends into the fixing screw hole to fix the lower cutter 202 to the cutter base. The other side wall of the U-shaped groove serves as an assembly position for the fixed connection between the cutter base and the base. The U-shaped groove facilitates the disassembly and installation of the lower cutter. Connecting structures can be installed within the U-shaped groove, minimizing the number of connecting parts fixing the cutter base above it. This effectively increases the adjustment distance of the lower cutter and improves the number of times the lower cutter can be repaired.

[0027] The cutter lifting mechanism 3 is mounted on the base 1, such as Figure 1-3 As shown, the cutter lifting mechanism 3 includes a cutter lifting cylinder 301, a cutter lifting connecting rod 302, and a cutter cylinder bracket 303. The lower end of the cutter cylinder bracket 303 is fixed on the base 1. The cutter lifting cylinder 301 is mounted on the cutter cylinder bracket 303, and the piston rod of the cutter lifting cylinder 301 is connected to the cutter lifting connecting rod 302. The free end of the cutter lifting connecting rod 303 is provided with a locking block, which engages with the upper cutter structure, thereby realizing the detachable connection between the lifting part of the cutter lifting mechanism 3 and the upper cutter structure.

[0028] The upper cutting structure is located above the cutting base 201. The upper cutting structure moves closer to or further away from the lower cutting blade under the action of the cutting lifting mechanism 3.

[0029] like Figure 1-5 As shown, the upper cutter structure includes an upper cutter fixing base plate 2031, an upper cutter rotating mounting block 2032, an upper cutter rotating shaft 2033, a spring 2034, a rotating shaft fixing block 2035, and an upper cutter 2036. A connecting block 2037 is provided on the upper cutter fixing base plate 2031, and the connecting block 2037 has a slot. The slot of the cutter lifting connecting rod engages with the cutter to achieve a detachable connection. The opening direction of the slot is the same as the disassembly direction of the detachable cutter mechanism.

[0030] An upper cutter rotating shaft 2033 is mounted on the end of the upper cutter fixing base plate 2031 near the lower cutter. The end of the upper cutter rotating shaft 2033 passes through a rotating shaft fixing block 2035, which is fixed to the upper cutter fixing base plate 2031. An upper cutter rotating mounting block 2032 is mounted on the upper cutter rotating shaft 2033 via a bushing, and the upper cutter rotating mounting block 2032 rotates around the upper cutter rotating shaft 2033.

[0031] In this embodiment, the end of the upper cutter rotating shaft 2033 located inside the rotating shaft fixing block is equipped with a bearing, so that the upper cutter rotating shaft can rotate in place relative to the rotating shaft fixing block. This setting is for adjusting the assembly tolerance of the cutter during the first use.

[0032] In order to install the rotating shaft fixing block 2035, the upper cutter fixing base plate 2031 is provided with an assembly step. The rotating part of the rotating shaft fixing block 2035 is located below the step surface of the assembly step. The step surface serves to limit the rotation direction and rotation position of the rotating shaft fixing block.

[0033] The upper cutter rotating mounting block 2032 has a spring mounting hole at the cutter fixing position, and the corresponding upper cutter fixing base plate 2031 also has a spring mounting hole. A spring 2034 is installed in the corresponding two spring mounting holes, and the spring is in a compressed state after assembly.

[0034] The upper cutter 2036 is detachably mounted on the end face of the upper cutter rotating mounting block 2032 away from the upper cutter fixing base plate. In this embodiment, screws are used for fixing. Screw holes are provided at the cutter fixing position of the upper cutter rotating mounting block, and screw clearance holes are provided on the upper cutter. The screw passes through the screw clearance hole and is tightened in the screw hole.

[0035] To prevent the upper cutter from being pushed open by the spring force and unable to engage with the lower cutter, an extended guide portion 20361 is provided on the lower end face of the upper cutter 2036. The extended guide portion 20361 is tightly attached to the outer wall of the lower cutter under the spring force; the cutting edge of the upper cutter 2036 corresponds to the cutting edge of the lower cutter. The upper cutter is pressed against the lower cutter by the spring, which allows it to rotate only along its axis of rotation. This avoids the gap between the upper and lower cutters caused by inconsistent spring force in existing vertical spring pressing methods. Furthermore, the extended guide portion occupies only a small portion of the upper cutter, primarily ensuring that the upper cutter receives a force opposite to the spring force, and also serves as a guide for the engagement of the upper and lower cutters, ensuring accurate engagement during cutting. During initial assembly, the engagement tolerance of the upper and lower cutters needs to be adjusted.

[0036] To ensure accurate engagement of the upper and lower cutters, the movement trajectory of the upper cutter needs to be limited. Therefore, an upper cutter moving guide rod 205 is installed between the cutter base 201 and the cutter fixing base plate 2031. The cutter base 201 is provided with a moving guide rod mounting hole. The upper cutter moving guide rod 205 is installed into the moving guide rod mounting hole through a linear ball bushing LBUW13. The upper end of the upper cutter moving guide rod passes upward through the cutter fixing base plate, so that the upper cutter structure slides along the upper cutter moving guide rod during the up and down movement, ensuring the linearity of the movement of the upper cutter structure.

[0037] To limit the travel of the upper cutter, an upper cutter movement limit rod 204 is installed on the cutter base 201. A limit stop is installed at the end of the upper cutter movement limit rod 204 that passes through the upper cutter fixing base plate 2031. The cutter lifting mechanism 3 drives the upper cutter structure to move closer to or further away from the lower cutter along the upper cutter movement limit rod 204. The upper cutter movement limit rod can limit the travel of the upper cutter, preventing the upper cutter from being pressed against the electrode tab pressure block due to excessive downward pressure distance caused by the cutter lifting cylinder, thus avoiding deformation of the parts.

[0038] like Figure 1-3 As shown in Figure 6, the tab pressing mechanism 4 includes a tab pressing block 401 and a tab pressing block lifting structure 402. The tab pressing block lifting structure 402 is parallel to the cutting blade lifting mechanism 3. The tab pressing block lifting structure includes a tab pressing block lifting cylinder 4021, a tab pressing block cylinder bracket 4022, a tab pressing block cylinder connecting rod 4023, and a tab pressing block guide rod 4024. The tab pressing block cylinder bracket 4022 is mounted on the cutting blade lifting cylinder 301. 021 is installed on the tab clamping block cylinder bracket 4022. The tab clamping block lifting cylinder 4021 is connected to the tab clamping block cylinder connecting rod 4023. The tab clamping block cylinder connecting rod 4023 passes downward through the cutter cylinder bracket 303 and connects to the tab clamping block 401. A tab clamping block guide rod 4024 is also provided between the cutter cylinder bracket 303 and the tab clamping block 401. The tab clamping block guide rod 4024 moves with the tab clamping block 401 in the clearance hole of the cutter cylinder bracket 303. The flattening part of the tab clamping block 401 is located between the lower cutter 202 and the upper cutter rotating mounting block 2032. It clamps the tab and flattens the cut edge during tab cutting.

[0039] In this embodiment, the tab clamping block 401 is a U-shaped clamping block, with the flattened portion of the U-shaped clamping block located between the lower cutter 202 and the upper cutter rotating mounting block 2032; the portion of the U-shaped clamping block parallel to the flattened portion is located above the cutter fixing base plate. The opening direction of the U-shaped clamping block is the disassembly direction of the detachable cutter mechanism. Furthermore, separating the tab clamping block from the upper and lower cutters increases the operable space for blade setting.

[0040] When replacing the cutter, simply remove the fixing screws of the cutter base 201 and the base through the U-shaped groove, separate the clip of the cutter lifting connecting rod from the slot, and then disassemble the detachable mechanism along the opening direction of the electrode pressure block. Replace the upper or lower cutter separately. The lower cutter is tightened with a set screw.

[0041] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel tab cutting mechanism for a winding machine, characterized in that: It includes a base (1), a detachable cutter mechanism (2), a cutter lifting mechanism (3), and an electrode clamping block mechanism (4); the detachable cutter mechanism (2) includes a cutter base (201), a lower cutter (202), and an upper cutter structure; The cutter base (201) is detachably mounted on the base (1), and the lower cutter (202) is mounted on the top of the cutter base (201); The cutting blade lifting mechanism (3) is installed on the base (1). The lifting part of the cutting blade lifting mechanism (3) is detachably connected to the upper cutting blade structure. The upper cutting blade structure is located above the cutting blade base (201). The cutting blade lifting mechanism (3) drives the upper cutting blade structure to move closer to or away from the lower cutting blade. The tab pressing block mechanism (4) includes a tab pressing block (401) and a tab pressing block lifting structure (402). The tab pressing block lifting structure (402) is parallel to the cutting blade lifting mechanism (3). The lifting part of the tab pressing block lifting structure (402) is connected to the tab pressing block (401). The flattening part of the tab pressing block (401) is located between the lower cutting blade (202) and the upper cutting blade structure.

2. The novel tab cutting mechanism for a winding machine according to claim 1, characterized in that: The upper cutter structure includes an upper cutter fixing base plate (2031), an upper cutter rotating mounting block (2032), an upper cutter rotating shaft (2033), a spring (2034), a rotating shaft fixing block (2035), and an upper cutter (2036); the upper cutter fixing base plate (2031) is detachably connected to the lifting part of the cutter lifting mechanism (3); the upper cutter fixing base plate (2031) is equipped with an upper cutter rotating shaft (2033) near the end of the lower cutter, and the end of the upper cutter rotating shaft (2033) passes through the rotating shaft fixing block (2035), which is fixed on the upper cutter fixing base plate (2031); the upper cutter rotates... An upper cutter rotating mounting block (2032) is mounted on the shaft (2033), and the upper cutter rotating mounting block (2032) rotates around the upper cutter rotating shaft (2033); a spring (2034) is provided between the upper cutter rotating mounting block (2032) and the upper cutter fixing base plate (2031); an upper cutter (2036) is detachably mounted on the end face of the upper cutter rotating mounting block (2032) away from the upper cutter fixing base plate; an extension guide (20361) is provided on the lower end face of the upper cutter (2036), and the extension guide (20361) is tightly attached to the outer wall of the lower cutter under the action of the spring; the cutting edge of the upper cutter (2036) corresponds to the cutting edge of the lower cutter.

3. The novel tab cutting mechanism for a winding machine according to claim 2, characterized in that: An upper cutter movement limit rod (204) is installed on the cutter base (201). A limit stop is installed at the end of the upper cutter movement limit rod (204) that passes through the upper cutter fixing base plate (2031). The cutter lifting mechanism (3) drives the upper cutter structure to move closer to or away from the lower cutter along the upper cutter movement limit rod (204).

4. The novel tab cutting mechanism for a winding machine according to claim 3, characterized in that: An upper cutter moving guide rod (205) is also installed between the cutter base (201) and the cutter fixing base plate (2031).

5. The novel tab cutting mechanism for a winding machine according to any one of claims 1-4, characterized in that: The cutter base (201) is provided with a lower cutter adjustment plate (206) at the end of the lower cutter (202) away from the upper cutter structure. The lower cutter adjustment plate (206) is provided with a threaded hole. The adjusting screw is threadedly connected to the threaded hole and abuts against the lower cutter. The adjusting screw is set in the horizontal direction.

6. The novel tab cutting mechanism for a winding machine according to claim 5, characterized in that: The cutter base (201) has a U-shaped groove below the lower cutter, and a lower cutter fixing hole is provided on the side wall of the U-shaped groove.

7. The novel tab cutting mechanism for a winding machine according to claims 1-4, characterized in that: The tab pressing block (401) is a U-shaped pressing block. The flattening part of the U-shaped pressing block is located between the lower cutter (202) and the upper cutter rotating mounting block (2032). The part of the U-shaped pressing block that is parallel to the flattening part is located above the cutter fixing base plate.

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