Automatic reset mechanism of driven roller

Abstract

The utility model relates to the field of resetting mechanisms, in particular to an automatic resetting mechanism of a driven roller, which comprises a machine table, a retainer and a driven compression roller, a driven roller sliding seat and a resetting cylinder are arranged on the surface of the machine table, the driven roller sliding seat is slidably connected with the machine table through a sliding rail, the axis of the sliding rail is parallel to the axis of the driven compression roller, and the resetting cylinder is arranged on the edge of the machine table. A pressing cylinder and a reset plate are arranged on the surface of the driven roller sliding seat, a telescopic rod of the pressing cylinder is connected with the end, away from the driven pressing roller, of the retainer, the axis of the pressing cylinder is parallel to the axis of the reset cylinder, a reset follow-up block is arranged on the telescopic rod of the pressing cylinder, and a positioning opening is formed in the end, close to the reset follow-up block, of the reset plate. When the driving roller and the pole piece deviate, the driven roller sliding seat, the retainer and the driven pressing roller move along with the driving roller in the horizontal direction so as to achieve deviation correction, and the phenomenon that the pole piece is wrinkled due to the fact that the driven pressing roller vibrates is prevented.

Description

Technical Field

[0001] The utility model relates to the field of reset mechanisms, in particular to an automatic reset mechanism for a driven roller. Background Art

[0002] The winding of lithium battery cells is an important link in the manufacturing process of lithium batteries, and its quality directly affects the performance and safety of the final battery. The winding of lithium battery cells, also known as the winding process, is a process of winding the positive electrode sheet, negative electrode sheet and separator through the winding needle mechanism of a winding machine to form a bare cell (Jelly-Roll, abbreviated as JR). During this process, the adjacent positive and negative electrode sheets are separated by the separator to avoid short circuits. The positive electrode sheet, negative electrode sheet and separator are prepared according to certain specifications and sequences to ensure that their widths, lengths and qualities meet the process requirements, and are fed into the winding needle mechanism of the winding machine. Through the precise control of the winding machine, they are tightly wound together. During the winding process, it is necessary to ensure that there is no physical contact short circuit between the positive and negative electrodes, and the negative electrode sheet can completely cover the positive electrode sheet. After winding, the winding core is fixed with end adhesive tape to prevent it from spreading.

[0003] The positive and negative electrode sheets and the separator need to be accurately aligned during the winding process to ensure the uniformity and stability of the internal structure of the cell. Misalignment may cause internal short circuits or affect the performance of the cell. During the winding process of lithium battery cells, due to the influence of various factors such as equipment accuracy, material quality, and operating environment, the phenomenon of offset of the electrode sheet or diaphragm may occur. This offset will not only lead to non-uniformity of the internal structure of the cell, but also may cause potential safety hazards such as internal short circuits. Therefore, timely deviation correction is crucial for ensuring the quality of the cell.

[0004] During the winding of the cell, the positive and negative electrode sheets are fed by the driving roller and the driven roller. The driving roller can move horizontally together with the offset of the film for deviation correction. The existing driven roller is pulled by springs on both sides. After the driven roller is pressed against the driving roller, it can move together with the driving roller through the springs. After the driven roller is separated from the driving roller, it is reset by the springs. When the driven roller is pressed against the driving roller, the driven roller will be driven to rotate together with the driving roller. During rotation, the springs are likely to cause vibration of the driven roller, and the vibration will affect the electrode sheet and cause wrinkling. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art solutions, the utility model provides an automatic reset mechanism for a driven roller, which can effectively solve the technical problem that the driven roller will vibrate during rotation, resulting in wrinkling of the electrode sheet.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Automatic reset mechanism of driven roller, including machine table, cage and driven pressure roller. The driven pressure roller is rotatably arranged in the cage, and the cage is movably connected with the machine table. The surface of the machine table is provided with a driven roller slide and a reset cylinder. The driven roller slide is slidably connected with the machine table through a slide rail. The axis of the slide rail is parallel to the axis of the driven pressure roller. The axis of the reset cylinder is in a "cross" shape with the axis of the slide rail. The reset cylinder is arranged on the machine table. The surface of the driven roller slide is provided with a pressing cylinder and a reset plate. The telescopic rod of the pressing cylinder is connected with the end of the cage far from the driven pressure roller. When the pressing cylinder expands and contracts, it can drive the driven pressure roller to move, so that the moving pressure roller approaches or moves away from the driving roller for feeding. The axis of the pressing cylinder is parallel to the axis of the reset cylinder. A reset follower block is arranged on the telescopic rod of the reset cylinder. When the reset cylinder expands and contracts, it can drive the reset follower block to move away from or close to the reset plate. The moving direction of the pressing cylinder driving the driven pressure roller is opposite to the moving direction of the reset cylinder driving the reset follower block. A positioning port is arranged at one end of the reset plate close to the reset follower block. The positioning port is aligned with the reset follower block, and the positioning port can be tightly attached to the side wall of the reset follower block.

[0008] Further, a guiding block is arranged on the surface of the driven roller slide. A guiding hole is arranged in the guiding block. One end of the cage close to the driven roller slide is provided with a guiding column. The end of the guiding column far from the cage passes through the guiding block and is slidably matched with the guiding hole. The axes of the guiding column and the guiding hole are parallel to the axis of the pressing cylinder.

[0009] Further, there are two or more guiding blocks and guiding columns. Two or more guiding columns respectively pass through two or more guiding blocks, and the ends of two or more guiding columns far from the cage are connected with each other by a connecting arm.

[0010] Further, an air blowing head is arranged on the cage. An air duct and a plurality of air blowing ports are arranged in the air blowing head. A plurality of air blowing ports are all communicated with the air duct and extend to the surface of the air blowing head. One end of the air duct is provided with an air pipe interface.

[0011] Further, the positioning port is in a "V" shape and the opening faces the reset follower block. The reset follower block is cylindrical. The reset follower block is connected with the telescopic rod of the reset cylinder through an L-shaped connecting plate. The axis of the reset follower block is parallel to the side wall of the positioning port. The reset follower block is rotatably arranged on the L-shaped connecting plate.

[0012] Further, the pressing cylinder and the reset cylinder share one solenoid valve, so that the pressing cylinder and the reset cylinder expand and contract synchronously.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: A driven roller slide is provided. The driven roller slide is slidably connected to the machine table through a slide rail. The driven roller slide can horizontally slide on the surface of the machine table along the slide rail. The pressing air cylinder and the reset air cylinder extend and retract synchronously. When the pressing air cylinder extends, the driven pressing roller approaches the driving roller and presses the battery cell pole piece against the driving roller. At this time, the reset plate is separated from the reset follower block. When the driving roller and the pole piece are offset, the driven roller slide, the cage and the driven pressing roller move horizontally together with the driving roller to achieve deviation correction. The surface of the pole piece is pressed by the driven pressing roller and the driving roller through the pressing air cylinder, preventing the driven pressing roller from vibrating and causing the pole piece to wrinkle. After the pressing air cylinder and the reset air cylinder contract, the driven pressing roller leaves the driving roller, the reset plate and the reset follower block approach each other, and the reset follower block can drive the reset plate to move through the positioning port, so that the driven roller slide returns to the central position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front perspective view of the present utility model;

[0015] Figure 2 is the rear perspective view of the present utility model;

[0016] Figure 3 is the front view of the present utility model;

[0017] Figure 4 is the schematic diagram of the working state of the present utility model;

[0018] Figure 5 is the schematic diagram of the shutdown state of the present utility model;

[0019] Reference numerals in the figures: 1 - machine table, 2 - cage, 3 - driven pressing roller, 4 - air blowing head, 5 - air blowing port, 6 - air pipe interface, 7 - driven roller slide, 8 - reset air cylinder, 9 - pressing air cylinder, 10 - reset plate, 11 - guide block, 12 - guide post, 13 - reset follower block, 14 - positioning port, 15 - driving roller, 16 - connecting arm, 17 - slide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] The following will be combined with Figures 1 - 5 to make a detailed description of the automatic reset mechanism of the driven roller of the present utility model:

[0022] Automatic reset mechanism of driven roller, including machine table 1, cage 2 and driven pressure roller 3. The driven pressure roller 3 is rotatably arranged in the cage 2, and the cage 2 is movably connected with the machine table 1. An air blowing head 4 is arranged on the cage 2. An air duct and a plurality of air blowing ports 5 are arranged in the air blowing head 4. The plurality of air blowing ports 5 are all communicated with the air duct and extend to the surface of the air blowing head 4. One end of the air duct is provided with an air pipe interface 6.

[0023] A driven roller slide 7 and a reset cylinder 8 are arranged on the surface of the machine table 1. The driven roller slide 7 is slidably connected with the machine table 1 through a slide rail 17. The axis of the slide rail 17 is parallel to the axis of the driven pressure roller 3. The axis of the reset cylinder 8 is in a "cross" shape with the axis of the slide rail 17. The reset cylinder 8 is arranged on the machine table 1. A pressing cylinder 9 and a reset plate 10 are arranged on the surface of the driven roller slide 7. The telescopic rod of the pressing cylinder 9 is connected with one end of the cage 2 far from the driven pressure roller 3. A guide block 11 is arranged on the surface of the driven roller slide 7. A guide hole is arranged in the guide block 11. One end of the cage 2 close to the driven roller slide 7 is provided with a guide post 12. The end of the guide post 12 far from the cage 2 passes through the guide block 11 and is slidably matched with the guide hole. The axes of the guide post 12 and the guide hole are parallel to the axis of the pressing cylinder 9. Two guide blocks 11 and two guide posts 12 are arranged. The two guide posts 12 respectively pass through the two guide blocks 11. The ends of the two guide posts 12 far from the cage 2 are connected with a connecting arm 16. By passing the guide post 12 through the guide block 11 and being slidably connected with the guide hole, the cage 2 and the driven pressure roller 3 can still be kept stable after the pressing cylinder 9 extends, and vibration of the cage 2 and the driven pressure roller 3 is avoided.

[0024] The axis of the pressing cylinder 9 is parallel to the axis of the reset cylinder 8. The pressing cylinder 9 and the reset cylinder 8 share a solenoid valve, so that the pressing cylinder 9 and the reset cylinder 8 extend and retract simultaneously. A reset follower block 13 is arranged on the telescopic rod of the reset cylinder 8. A positioning port 14 is arranged at one end of the reset plate 10 close to the reset follower block 13. The positioning port 14 is aligned with the reset follower block 13. The positioning port 14 can be closely attached to the side wall of the reset follower block 13. The positioning port 14 is in a "V" shape and the opening faces the reset follower block 13. The reset follower block 13 is cylindrical. The reset follower block 13 is connected with the telescopic rod of the reset cylinder 8 through an L-shaped connecting plate. The axis of the reset follower block 13 is parallel to the side wall of the positioning port 14. The reset follower block 13 is rotatably arranged on the L-shaped connecting plate.

[0025] The automatic reset mechanism of the driven roller in this embodiment is provided with a driven roller slide 7. The driven roller slide 7 is slidably connected with the machine table 1 through a slide rail 17. The driven roller slide 7 can slide horizontally on the surface of the machine table 1 along the slide rail 17. The pressing cylinder 9 and the reset cylinder 8 extend and retract synchronously. In the working state, such as Figure 4As shown, the pressing cylinder 9 extends, causing the driven pressure roller 3 to approach the driving roller 15 and press against the electrode sheet of the battery cell. When the driving roller 15 and the electrode sheet are displaced, the driven roller slide 7, the cage 2, and the driven pressure roller 3 move horizontally along with the driving roller 15 to achieve deviation correction. The reset cylinder 8 extends synchronously with the pressing cylinder 9, separating the reset plate 10 from the reset follower block 13. The pressing cylinder 9 presses the surface of the electrode sheet with the driven pressure roller 3 and the driving roller 15, preventing the driven pressure roller 3 from vibrating and causing the electrode sheet to wrinkle.

[0026] In the shutdown state, as Figure 5 shown, the pressing cylinder 9 and the reset cylinder 8 contract, the driven pressure roller 3 leaves the driving roller 15, the reset plate 10 and the reset follower block 13 approach each other. After the side wall of the reset follower block 13 contacts the positioning port 14, the reset follower block 13 drives the reset plate 10 to move, causing the driven roller slide 7 to slide horizontally along the slide rail 17 on the surface of the machine table 1. When the side wall of the reset follower block 13 is pressed against both inner walls of the "V"-shaped positioning port 14, the driven roller slide 7 is reset and fixed in position and cannot move horizontally anymore. After shutdown, the driving roller 15 will also automatically reset. After resetting, the driven pressure roller 3 is aligned with the driving roller 15, ensuring that the driven pressure roller 3 and the driving roller 15 can be aligned and pressed against each other when starting the machine next time.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. The automatic reset mechanism of the driven roller comprises a machine platform, a retaining frame and a driven pressure roller, wherein the driven pressure roller is rotatably arranged in the retaining frame, and the retaining frame is movably connected to the machine platform, and is characterized in that: The surface of the machine platform is provided with a driven roller slide and a reset cylinder, the driven roller slide is slidably connected to the machine platform through a slide rail, the axis of the slide rail is parallel to the axis of the driven pressure roller, the axis of the reset cylinder and the axis of the slide rail are in a "cross" shape, the reset cylinder is arranged on the machine platform, the surface of the driven roller slide is provided with a clamping cylinder and a reset plate, the telescopic rod of the clamping cylinder is connected to the end of the retaining frame away from the driven pressure roller, the clamping cylinder can drive the driven pressure roller to move when it is telescopic, so that the dynamic pressure roller is close to or away from the active roller for feeding, the axis of the clamping cylinder is parallel to the axis of the reset cylinder, a reset follower block is arranged on the telescopic rod of the reset cylinder, the reset follower block can be driven away from or close to the reset plate when the reset cylinder is telescopic, the moving direction of the driven pressure roller driven by the clamping cylinder is opposite to the moving direction of the reset follower block driven by the reset cylinder, a positioning port is arranged on the end of the reset plate close to the reset follower block, the positioning port is aligned with the reset follower block, and the positioning port can be in close contact with the side wall of the reset follower block.

2. The automatic reset mechanism of the driven roller according to claim 1, characterized in that: A guide block is provided on the surface of the driven roller slide, a guide hole is provided in the guide block, a guide column is provided at one end of the retaining frame close to the driven roller slide, the guide column passes through the guide block at one end away from the retaining frame, and slides with the guide hole, and the axis of the guide column and the guide hole is parallel to the axis of the clamping cylinder.

3. The automatic reset mechanism of the driven roller according to claim 2, characterized in that: There are more than two guide blocks and guide posts, and the more than two guide posts pass through the more than two guide blocks respectively. The ends of the more than two guide posts away from the retaining frame are provided with connecting arms to connect with each other.

4. The automatic reset mechanism of the driven roller according to any one of claims 1 to 3, characterized in that: The retaining frame is provided with an air blowing head, in which an air duct and a plurality of air blowing ports are arranged. The plurality of air blowing ports are all connected with the air duct and extend to the surface of the air blowing head. An air pipe interface is arranged at one end of the air duct.

5. The automatic reset mechanism of the driven roller according to any one of claims 1 to 3, characterized in that: The positioning opening is in a "V" shape, and the opening faces the reset follower block, which is cylindrical. The reset follower block is connected to the telescopic rod of the reset cylinder through an L-shaped connecting plate. The axis of the reset follower block is parallel to the side wall of the positioning opening, and the reset follower block is rotatably arranged on the L-shaped connecting plate.

6. The automatic reset mechanism of the driven roller according to any one of claims 1 to 3, characterized in that: The pressing cylinder and the resetting cylinder share a solenoid valve, so that the pressing cylinder and the resetting cylinder can be extended and retracted at the same time.

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