Sheet feeding mechanism

Abstract

The utility model discloses a sheet feeding mechanism which comprises a sheet feeding assembly and a cutting assembly. The piece conveying assembly is used for conveying pole pieces, and the cutting assembly is used for cutting the pole pieces. The pole piece feeding assembly and the cutting assembly are connected with the same first driving part, and the first driving part drives the pole piece feeding assembly to clamp the pole piece before the cutting assembly and continuously clamp the pole piece after the pole piece is cut off by the cutting assembly. According to the sheet feeding mechanism, the sheet feeding assembly and the cutting assembly are synchronously controlled through the same first driving piece, the working rhythm of the sheet feeding assembly and the working rhythm of the cutting assembly can be conveniently controlled, and the cutting precision and the cutting efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the field of lithium battery automation equipment, and particularly relates to a sheet feeding mechanism. Background Art

[0002] The winding process of the battery cell starts from the precise lamination and winding of the electrode sheets (the positive electrode sheet and the negative electrode sheet) and the separator. Among them, the precise and continuous supply of the electrode sheets is the prerequisite for realizing efficient winding.

[0003] In the design of the traditional sheet feeding mechanism, it is not easy to control the working beats of the sheet feeding component and the cutting component, and there are risks of material jamming and poor cutting accuracy of the electrode sheets. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sheet feeding mechanism that improves the cutting accuracy and cutting efficiency.

[0005] To achieve the above purpose, the sheet feeding mechanism of the utility model includes: a sheet feeding component and a cutting component. The sheet feeding component is used for conveying the electrode sheet, and the cutting component is used for cutting the electrode sheet. The sheet feeding component and the cutting component are connected to the same first driving part. The first driving part drives the sheet feeding component to clamp the electrode sheet before the cutting component, and continues to clamp the electrode sheet after the cutting component cuts off the electrode sheet.

[0006] In an embodiment of the sheet feeding mechanism of the utility model, the sheet feeding component and the cutting component are respectively connected to the first driving part through a transmission component. The transmission component converts the driving of the first driving part in the width direction of the electrode sheet into the clamping movement and cutting movement of the sheet feeding component and the cutting component in the thickness direction of the electrode sheet.

[0007] In an embodiment of the sheet feeding mechanism of the utility model, the transmission component includes a driving arm and a cam plate. The driving arm is connected to the sheet feeding component / the cutting component, the cam plate is connected to the first driving part, the cam plate is provided with a cam groove, and the driving arm is provided with a cam that cooperates with the cam groove.

[0008] In an embodiment of the sheet feeding mechanism of the utility model, the sheet feeding component includes a driving roller and a driven roller that are oppositely arranged. The driving roller is driven to rotate actively, and the driving arm of the transmission component connected to the sheet feeding component is connected to the driven roller.

[0009] In an embodiment of the sheet feeding mechanism of the utility model, the transmission component further includes a pushing part that pushes the driven roller towards the driving roller.

[0010] In an embodiment of the sheet feeding mechanism of the utility model, the transmission component further includes a second driving part that can change the installation position of the cam plate on the first driving part.

[0011] In an embodiment of the sheet feeding mechanism of the present utility model, the cutting assembly includes a first cutting knife and a second cutting knife which are oppositely arranged, and a driving arm of a transmission assembly connected to the cutting assembly is connected to the second cutting knife.

[0012] In an embodiment of the sheet feeding mechanism of the present utility model, the transmission assembly further includes a sliding plate. The sliding plate is slidably connected to the sheet feeding assembly through a first sliding rail arranged along the thickness direction of the pole piece. A third cam is arranged on one side of the sliding plate, and a third cam groove is arranged on the other side. The cam is matched with the third cam groove.

[0013] In an embodiment of the sheet feeding mechanism of the present utility model, the sheet feeding assembly and the cutting assembly are installed on the same mounting plate and are driven to move synchronously along the pole piece conveying direction.

[0014] In an embodiment of the sheet feeding mechanism of the present utility model, a first deviation rectifying roller assembly is arranged upstream of the sheet feeding assembly, and a deviation rectifying sensor and a second deviation rectifying roller assembly are arranged downstream of the cutting assembly. The deviation rectifying sensor is used to detect the deviation of the pole piece, and the first deviation rectifying roller assembly and the second deviation rectifying roller assembly move synchronously according to the deviation of the pole piece.

[0015] In summary, the sheet feeding mechanism of the present utility model synchronously controls the sheet feeding assembly and the cutting assembly through the same first driving member, which is convenient for controlling the working beats of the sheet feeding assembly and the cutting assembly, and improves the cutting accuracy and cutting efficiency. Description of the Drawings

[0016] Figure 1 is a structural diagram of the first embodiment of the sheet feeding mechanism of the present utility model;

[0017] Figure 2 is Figure 1 an exploded view of the sheet feeding assembly and the cutting assembly from another angle;

[0018] Figure 3 is Figure 1 a top view of the first cam plate and the second cam plate in

[0019] Figure 4 is a structural diagram of the second embodiment of the sheet feeding mechanism of the present utility model;

[0020] In the figure: 100, mounting plate; 110, third driving member; 120, second slide rail; 200, sheet feeding assembly; 210, driving roller; 220, driven roller; 230, first mounting seat; 240, second mounting seat; 250, fourth driving member; 260, third slide rail; 300, cutting assembly; 310, first cutter; 320, second cutter; 330, first cutter seat; 340, second cutter seat; 400, first driving member; 410, L-shaped connecting plate; 420, fourth slide rail; 500, transmission assembly; 500a, first transmission assembly; 500b, second transmission assembly; 510, driving arm; 511, first driving arm; 512, second driving arm; 520, cam plate; 521, first cam plate; 522, second cam plate; 530, cam groove; 531, first cam groove; 5311, roller separation section; 5312, clamping section; 5313, first transition section; 532, second cam groove; 5321, cutter separation section; 5322, cutting extreme point; 5323, second transition section; 540, cam; 541, first cam; 542, second cam; 550, pushing member; 560, sliding plate; 561, third cam; 562, third cam groove; 570, first slide rail; 580, connecting plate; 590, second driving member; 600, first deviation rectifying roller assembly; 610, roller body; 700, deviation rectifying sensor; 800, second deviation rectifying roller assembly. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments given are not intended to limit the present utility model.

[0022] As Figure 1As shown in the figure, the sheet feeding mechanism of the first embodiment of the present utility model includes a sheet feeding component 200 and a cutting component 300 installed on the same mounting plate 100. The mounting plate 100 can be driven by a third driving member 110 to drive the sheet feeding component 200 and the cutting component 300 to move synchronously along the pole piece transmission direction. The mounting plate 100 is installed on a second slide rail 120. The third driving member 110 adopts a motor and a lead screw assembly. The driving direction of the third driving member 110 and the extending direction of the second slide rail 120 are both set along the pole piece conveying direction. The sheet feeding component 200 conveys the pole piece in a rolling manner, and the cutting component 300 is used to cut the pole piece. The third driving member 110 synchronously drives the sheet feeding component 200 and the cutting component 300 to move until the speed is the same as the pole piece conveying speed. Before the cutting component 300 cuts the pole piece, the sheet feeding component 200 clamps the pole piece. After the cutting component 300 cuts the pole piece, a previous pole piece and a subsequent pole piece are formed. The sheet feeding component 200 continues to clamp the head of the subsequent pole piece to prevent the subsequent pole piece from retreating, and the sheet feeding component conveys the head of the subsequent pole piece to pass through the cutting component 300 in a rolling manner. The sheet feeding component 200 and the cutting component 300 are installed on the same mounting plate 100 and are closely installed to prevent relative movement between the sheet feeding component 200 and the cutting component 300, prevent the head of the subsequent pole piece from being blocked, and reduce the risk of pole piece jamming.

[0023] The sheet feeding component 200 and the cutting component 300 are controlled by the same first driving member 400. The first driving member 400 drives the sheet feeding component 200 to clamp the pole piece before the cutting component 300 and continues to clamp the pole piece after the cutting component 300 cuts the pole piece. The sheet feeding component 200 and the cutting component 300 are controlled by the same first driving member 400, which reduces the number of driving members used, facilitates controlling the working rhythm of the sheet feeding component 200 and the cutting component 300, and improves the cutting accuracy and cutting efficiency.

[0024] The sheet feeding component 200 and the cutting component 300 are respectively connected to the first driving member 400 through a transmission component 500. The first driving member 400 adopts a motor and a lead screw assembly, and its driving direction is set along the pole piece width direction. The transmission component 500 converts the driving of the first driving member 400 along the pole piece width direction into the clamping movement and cutting movement of the sheet feeding component 200 and the cutting component 300 along the pole piece thickness direction.

[0025] The transmission component 500 adopts a structure of a cam and a cam groove in cooperation. The transmission component 500 includes a driving arm 510 and a cam plate 520. The driving arm is connected to the sheet feeding component 200 / cutting component 300, the cam plate 520 is connected to the first driving member 400, the cam plate 520 is provided with a cam groove 530, and the driving arm 510 is provided with a cam 540 that cooperates with the cam groove 530.

[0026] Specifically, as Figure 1As shown in the figure, the transmission assembly 500 connecting the first driving member 400 and the sheet feeding assembly 200 is called the first transmission assembly 500a. The first transmission assembly 500a includes a first driving arm 511 and a first cam plate 521. The first cam plate 521 is connected to the first driving member 400, and the first driving arm 511 is connected to the sheet feeding assembly 200. The first cam plate 521 is provided with a first cam groove 531, and the first driving arm 511 is provided with a first cam 541 that cooperates with the first cam groove 531.

[0027] The sheet feeding assembly 200 includes a driving roller 210 and a driven roller 220 that are oppositely arranged. The driving roller 210 is rotatably installed on the first mounting seat 230. The shaft body of the driving roller 210 passes through the first mounting seat 230 and is connected to a fourth driving member 250. The fourth driving member 250 is preferably a rotary motor that drives the driving roller 210 to rotate actively. The driven roller 220 is rotatably installed on the second mounting seat 240, and the second mounting seat 240 is slidably installed on the first mounting seat 230 through a third slide rail 260. The first transmission assembly 500a is connected to the sheet feeding assembly 200, and the driven roller 220 is connected to the first driving arm 511 through the second mounting seat 240.

[0028] The first cam groove 531 extends along the width direction of the pole piece and has undulations along the thickness direction of the pole piece. The first cam 541 is clamped in the first cam groove 531. The first driving member 400 drives the first cam plate 521 to move along the width direction of the pole piece, driving the first cam groove 531 to move along the width direction of the pole piece. Under the action of the first cam groove 531, the first cam 541 drives the first driving arm 511 to move along the thickness direction of the pole piece, thereby driving the driven roller 220 to approach or move away from the driving roller 210. At this time, the first cam groove 531 has groove surfaces that abut against both sides of the first cam 541 in the thickness direction of the pole piece.

[0029] Furthermore, the first transmission assembly 500a further includes a pushing member 550. The pushing member 550 pushes the driven roller 220 towards the driving roller 210. At this time, the first cam groove 531 has a groove surface that abuts against one side of the first cam 541 in the thickness direction of the pole piece. The pushing member 550 is preferably a spring cylinder and is installed on the first mounting seat 230. Its driving end is connected to the second mounting seat 240 and always drives the second mounting seat 240 to approach the first mounting seat 230.

[0030] As Figure 3As shown, the transmission component 500 connecting the first driving member 400 and the cutting component 300 is referred to as the second transmission component 500b. The second transmission component 500b includes a second driving arm 512 and a second cam plate 522. The second cam plate 522 is connected to the first driving member 400, and the second driving arm 512 is connected to the cutting component 300. The second cam plate 522 is provided with a second cam groove 532, and the second driving arm 512 is provided with a second cam 542 that cooperates with the second cam groove 532.

[0031] The cutting component 300 includes a first cutter 310 and a second cutter 320 that are oppositely arranged. The first cutter is installed on the first cutter seat 330, the first cutter seat 330 is installed on the first mounting seat 230, the second cutter 320 is installed on the second cutter seat 340, the second cutter seat 340 is slidably installed on the first cutter seat 330, and the cutting edges of the first cutter 310 and the second cutter 320 are oppositely arranged. The second transmission component 500b is connected to the cutting component 300, and the second cutter 320 is connected to the second driving arm 512 through the second cutter seat 340.

[0032] The second cam groove 532 extends along the width direction of the pole piece and has undulations along the thickness direction of the pole piece. The second cam 542 is clamped in the second cam groove 532. The first driving member 400 drives the second cam plate 522 to move along the width direction of the pole piece, driving the second cam groove 532 to move along the width direction of the pole piece. Under the action of the second cam groove 532, the second cam 542 drives the second driving arm 512 to move along the thickness direction of the pole piece, thereby driving the second cutter 320 to approach or move away from the first cutter 310. At this time, the second cam groove 532 has groove surfaces that abut against both sides of the second cam 542 in the thickness direction of the pole piece.

[0033] Further, the second cam 542 is indirectly connected to the second cam groove 532. The second transmission assembly 500b further includes a sliding plate 560. The sliding plate 560 is slidably connected to the sheet feeding assembly 200 through a first slide rail 570 arranged along the thickness direction of the pole piece. The first slide rail 570 is slidably mounted on a connecting plate 580, and the connecting plate 580 is fixedly mounted on the first mounting seat 230 of the sheet feeding assembly 200. A third cam 561 is arranged on one side of the sliding plate 560, and a third cam groove 562 is arranged on the other side. The second cam 542 cooperates with the third cam groove 562, and the third cam 561 cooperates with the second cam groove 532. The first driving member 400 drives the second cam plate 522 to move along the width direction of the pole piece, driving the second cam groove 532 to move along the width direction of the pole piece. Under the action of the second cam groove 532, the third cam 561 drives the sliding plate 560 to move along the thickness direction of the pole piece, and further drives the third cam groove 562 to move along the thickness direction of the pole piece. The third cam groove 562 drives the second cutter 320 to approach or move away from the first cutter 310 through the second cam 542 and the second driving arm 512. By using an indirect method to drive the cutting of the cutting assembly 300, the second cam 542 is only subjected to the acting force of the sliding plate 560 along the thickness direction of the pole piece, improving the movement accuracy of the second cutter 320 and reducing the burrs in the pole piece cutting.

[0034] The first cam groove 531 is respectively connected to the first cam plate 521 and the second cam plate 522 through an L-shaped connecting plate 410. The first cam plate 521 is located above the L-shaped connecting plate 410, and the second cam plate 522 is located below the L-shaped connecting plate 410, which can not only enable the first driving member 400 to synchronously drive the two cam plates, but also improve the space utilization rate.

[0035] Such as Figure 3As shown in the figure, it is a top view of the first cam plate 521 and the second cam plate 522. The second cam groove 532 is located on the back of the second cam plate 522 in the figure. Therefore, the second cam groove 532 is shown by a dashed line in the figure. The first cam groove 531 includes two roller separation sections 5311. A clamping section 5312 is provided between the two roller separation sections 5311. The clamping section 5312 is closer to the sheet feeding assembly 200 than the two roller separation sections 5311 in the thickness direction of the pole piece. The two roller separation sections 5311 are respectively connected to the clamping section 5312 through first transition sections 5313. The second cam groove 532 includes two cutter separation sections 5321. A cutting pole point 5322 is provided between the two cutter separation sections 5321. The two cutter separation sections 5321 are respectively connected to the cutting pole point 5322 through second transition sections 5323. In order to ensure that the sheet feeding assembly 200 can hold the pole piece before and after pole piece cutting, the installation positions of the first cam plate 521 and the second cam plate 522 should meet the requirement that the projection of the cutting pole point 5322 along the width direction of the pole piece is always located within the clamping section 5312 of the first cam groove 531 (excluding the connection points between the clamping section 5312 and the first transition sections 5313).

[0036] Refer again to Figure 1 As shown in the figure, the transmission assembly 500 further includes a second driving member 590. The second driving member 590 can change the installation position of the first cam plate 521 on the first driving member 400. The second driving member 590 is preferably a cylinder and is installed on the L-shaped connecting plate 410. Its driving end is connected to the first cam plate 521. The first cam plate 521 is slidably installed on the L-shaped connecting plate 410 through a fourth slide rail 420. The second driving member 590 can change the relative position between the first cam plate 521 and the second cam plate 522, and thus change the length of the pole piece conveyed before or after the cutting assembly 300 cuts the pole piece according to actual requirements.

[0037] As Figure 4As shown in the figure, this is the second embodiment of the present utility model. The sheet feeding mechanism further includes a first deviation rectifying roller assembly 600 arranged upstream of the sheet feeding assembly 200, a deviation rectifying sensor 700 arranged downstream of the cutting assembly 300, and a second deviation rectifying roller assembly 800. The deviation rectifying sensor 700 is used to detect the deviation of the pole piece. The first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800 move synchronously according to the deviation of the pole piece. Both the first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800 include a pair of roller bodies 610 arranged oppositely, which can be driven to clamp the pole piece. The first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800 can be respectively connected to a deviation rectifying driving member (not shown in the figure), and both of the two deviation rectifying driving members are connected to the controller. The controller controls the synchronous movement of the two deviation rectifying driving members according to the deviation of the pole piece, and synchronously rectifies the pole piece between the first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800. In other embodiments, the first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800 can also be connected to the same deviation rectifying sensor through a connecting rod, and the deviation rectifying sensor synchronously rectifies the pole piece between the first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800. This two-end synchronous deviation rectifying method has a better deviation rectifying effect when the distance between the first deviation rectifying roller assembly 600 and the second deviation rectifying roller assembly 800 is relatively close and the pole piece is relatively short.

[0038] The above embodiments are only preferred embodiments given to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model is subject to the claims.

Claims

1. A sheet feeding mechanism for conveying electrode sheets, characterized in that, Including: A sheet feeding component and a cutting component. The sheet feeding component is used to convey the pole piece, and the cutting component is used to cut the pole piece. The sheet feeding component and the cutting component are connected to the same first driving member. The first driving member drives the sheet feeding component to clamp the pole piece before the cutting component and continue to clamp the pole piece after the cutting component cuts off the pole piece.

2. The sheet feeding mechanism according to claim 1, characterized in that, The sheet feeding component and the cutting component are respectively connected to the first driving member through a transmission component. The transmission component converts the driving of the first driving member in the width direction of the pole piece into the clamping movement and cutting movement of the sheet feeding component and the cutting component in the thickness direction of the pole piece.

3. The sheet feeding mechanism according to claim 2, wherein, The transmission component includes a driving arm and a cam plate. The driving arm is connected to the sheet feeding component / cutting component, and the cam plate is connected to the first driving member. The cam plate is provided with a cam groove, and the driving arm is provided with a cam that cooperates with the cam groove.

4. The sheet feeding mechanism according to claim 3, wherein: The sheet feeding component includes a driving roller and a driven roller arranged oppositely. The driving roller is driven to rotate actively, and the driving arm of the transmission component connected to the sheet feeding component is connected to the driven roller.

5. The sheet feeding mechanism according to claim 4, wherein The transmission component further includes a pushing member that pushes the driven roller towards the driving roller.

6. The sheet feeding mechanism according to claim 3, wherein, The transmission component further includes a second driving member that can change the installation position of the cam plate on the first driving member.

7. The sheet feeding mechanism according to claim 3, characterized in that The cutting component includes a first cutting knife and a second cutting knife arranged oppositely. The driving arm of the transmission component connected to the cutting component is connected to the second cutting knife.

8. The sheet feeding mechanism according to claim 7, wherein, The transmission component further includes a sliding plate. The sliding plate is slidably connected to the sheet feeding component through a first slide rail arranged in the thickness direction of the pole piece. One side of the sliding plate is provided with a third cam, and the other side is provided with a third cam groove. The cam cooperates with the third cam groove, and the third cam cooperates with the cam groove.

9. The sheet feeding mechanism according to claim 1, characterized in that, The sheet feeding component and the cutting component are installed on the same mounting plate and are driven to move synchronously in the pole piece conveying direction.

10. The sheet feeding mechanism according to claim 1, wherein: A first deviation rectifying roller assembly is arranged upstream of the sheet feeding component, and a deviation rectifying sensor and a second deviation rectifying roller assembly are arranged downstream of the cutting component. The deviation rectifying sensor is used to detect the deviation of the pole piece, and the first deviation rectifying roller assembly and the second deviation rectifying roller assembly move synchronously according to the deviation of the pole piece.

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