Diaphragm variable-pitch slitting device

Abstract

The utility model discloses a diaphragm variable pitch slitting device which comprises a pair of discs, the pair of discs are in transmission connection through a transmission rod, the transmission rod can rotate relative to the discs, the transmission rod and the discs are fixed through locking pieces, and the transmission rod comprises a middle section. A first spiral groove section and a second spiral groove section which are symmetrically distributed relative to the middle section and spirally extend are formed in the circumferential wall of the transmission rod, and the distance between the adjacent groove sections of the first spiral groove section and the second spiral groove section is gradually changed in the axial direction of the transmission rod; the driving mechanism is in driving connection with the disc and used for driving the disc to rotate around the axis; and the slitting assembly comprises a sliding block and a circular blade connected to the sliding block, and the sliding block is arranged on the transmission rod in a sleeving mode and can slide on the spiral groove. According to the diaphragm variable-pitch slitting device, the distance between the multiple sliding blocks can be adjusted, the requirement that the multiple circular blades achieve variable pitch and displacement at the same time is met, the adjusting time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm production technology, and further to a diaphragm variable pitch slitting device. Background Technology

[0002] The separator is a crucial component of lithium-ion batteries, directly impacting battery safety. After the separator substrate is prepared, it needs to be precisely cut to a specific width according to the specifications of the end product. In existing slitting equipment, the circular blades on the cutter shaft are generally fixed, and the distance between adjacent blades is also fixed. When the size of the material to be cut changes, the circular blades on the cutter shaft need to be disassembled, and the distance between adjacent blades needs to be determined during reinstallation. This process requires a significant amount of time for adjustment, resulting in high labor intensity, long processing time, and high labor costs, severely impacting the production efficiency of the slitting machine and affecting production benefits. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a diaphragm variable-pitch slitting device, which reduces the difficulty of disassembling and assembling the circular blade, and reduces operating time and labor intensity.

[0004] To achieve the above objectives, the diaphragm variable-pitch slitting device provided by this utility model includes:

[0005] A pair of discs are connected by a transmission rod, which is rotatable relative to the discs. The transmission rod is fixed to the discs by a locking device. The transmission rod includes a middle section. A first spiral groove and a second spiral groove are provided on the circumferential wall of the transmission rod, which are symmetrically distributed and spirally extended about the middle section. The spacing between adjacent grooves of the first spiral groove and the second spiral groove gradually changes along the axial direction of the transmission rod.

[0006] A drive mechanism, connected to the disk drive, is used to drive the disk to rotate around its own axis;

[0007] The slitting assembly includes a slider and a circular blade connected to the slider. The slider is sleeved on the transmission rod and can slide on the spiral groove.

[0008] In some embodiments, the spacing between adjacent segments of the first and second helical grooves gradually widens from the middle position along the axial direction.

[0009] In some embodiments, the drive mechanism includes a motor, which is driven by a pulley to the disk.

[0010] In some embodiments, the motor is a self-locking motor.

[0011] In some embodiments, a guide rod is also fixedly connected between the pair of disks, the guide rod extending axially along the transmission rod, and the circular blade is slidably connected to the guide rod.

[0012] In some embodiments, the guide rod is provided with graduations along its axial direction.

[0013] In some embodiments, the locking member has a fixed part and a movable part. The fixed part is connected to the transmission rod, and a slot is formed on the end face of the disc. One end of the movable part is connected to the fixed part, and the other end can be engaged in the slot of the disc.

[0014] In some embodiments, the circular blade has a through hole for the transmission rod to pass through, and the circular blade is connected to the slider by bolts.

[0015] Compared with the prior art, the diaphragm variable-pitch slitting device provided by this utility model has the following beneficial effects:

[0016] The diaphragm variable-pitch slitting device proposed in this utility model can adjust the distance between multiple sliders, meet the requirements of multiple circular blades to achieve simultaneous pitch and displacement, save adjustment time, and improve work efficiency. Attached Figure Description

[0017] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0018] Figure 1 This is a schematic diagram of the diaphragm slitting device in a preferred embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of the part where the chip suction hood is located.

[0020] Reference numerals: 1. Disc; 2. Transmission rod; 20. Intermediate section; 21. First spiral groove section; 22. Second spiral groove section; 3. Slider; 4. Circular blade; 5. Chip suction hood; 6. Guide rod; 7. Support base; 8. Locking bolt; 9. Suction branch pipe; 10. Suction main pipe; 11. Air pipe; 12. Vacuum suction pipe; 13. Chip collection box; 14. Vacuuming device; 15. Bracket; 16. Motor; 17. Locking component. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0022] like Figures 1 to 2 As shown, a preferred embodiment of the diaphragm slitting device according to the present invention includes a frame 15 and a slitting unit and a chip suction unit mounted on the frame 15. The slitting unit is used to process the diaphragm into a specific width, and the chip suction unit is used to remove the debris generated during the diaphragm slitting process.

[0023] The slitting unit includes a pair of discs 1, a transmission rod 2, and multiple circular blades 4. The pair of discs 1 are distributed axially at intervals. One of the discs 1 is connected to a motor 16, for example, driven to rotate by the motor 16 via a pulley. The transmission rod 2 is rotatably connected between the pair of discs 1 and can be fixedly connected to the disc 1 by a locking member 17. In this embodiment, the locking member 17 can be connected to the disc 1 by a snap-fit ​​mechanism. For example, the locking member 17 has a fixed part and a movable part. The fixed part is connected to the transmission rod 2, and a slot is formed on the end face of the disc 1. One end of the movable part is connected to the fixed part, and the other end can be snapped into the slot of the disc 1.

[0024] In this embodiment, a spiral groove extending from the circumference of the transmission rod 2 is formed, with different distances between adjacent groove segments. Multiple sliders 3 are fitted around the outer periphery of the spiral groove of the transmission rod 2, and multiple circular blades 4 are correspondingly mounted on the sliders 3. To prevent the diaphragm from winding around the transmission rod 2, the transmission rod 2 is positioned near the center of the circular blades 4. As an example, a through-hole for the transmission rod 2 to pass through is formed on the circular blade 4, and the circular blade 4 and the sliders 3 are connected as one unit by threads. By rotating the transmission rod 2, different sliders 3 can be driven to move into different groove segments, thereby adjusting the distance between adjacent circular blades 4. In other words, by placing different sliders 3 in different groove segments, the distance between the circular blades 4 can be adjusted, allowing for automatic and continuous adjustment of the distance between multiple circular blades 4. This meets the requirement of simultaneous pitch and displacement changes for multiple target circular blades 4, saving adjustment time and improving work efficiency.

[0025] In this embodiment, the transmission rod 2 includes a middle section 20, and the spiral groove includes a first spiral groove section 21 and a second spiral groove section 22 located on both sides of the middle section 20. The first spiral groove section 21 and the second spiral groove section 22 extend from the middle section 20 in opposite directions and are mirror-symmetrical with respect to the middle section 20. In some embodiments, the spacing between adjacent groove sections on the first spiral groove section 21 and the second spiral groove section 22 gradually widens from the middle position along the axial direction. The direction in which the transmission rod 2 points from the middle position toward the position of the first spiral groove section 21 is defined as the first direction. Similarly, the direction in which the transmission rod 2 points from the middle position toward the position of the second spiral groove section 22 is defined as the second direction. The second direction is opposite to the first direction. Along the first direction and the second direction, the spacing between any two adjacent groove sections gradually increases, that is, the distance between adjacent groove sections in the first spiral groove section 21 gradually increases along the first direction, and the distance between adjacent groove sections in the second spiral groove section 22 gradually increases along the second direction. It is understood that in other embodiments, the spacing between adjacent grooves on the first helical groove segment 21 and the second helical groove segment 22 may not gradually widen from the middle position along the axial direction, but rather gradually narrow.

[0026] In this embodiment, rotating the transmission rod 2 can cause the slider 3 to slide along the spiral path to different slots. The slot refers to the distance between two adjacent arc segments (specifically, the arc segment is a groove shape) in the spiral structure, similar to the pitch of a screw.

[0027] After the locking element 17 is released, the transmission rod 2 and the disc 1 change from a fixed state to a rotatable state. Rotating the transmission rod 2 causes the sliders 3 on the first spiral groove segment 21 and the second spiral groove segment 22 to slide in opposite directions. Since the first spiral groove segment 21 and the second spiral groove segment 22 are mirror-symmetrical with respect to the middle segment 20, the sliders 3 on the first spiral groove segment 21 and the second spiral groove segment 22 slide the same distance in opposite directions. Furthermore, the spacing between adjacent groove segments of the first spiral groove segment 21 and the second spiral groove segment 22 gradually changes, causing the movement distance of the sliders 3 located on any adjacent groove segment to gradually change. This gradual change in movement distance can be understood as the movement distance of two adjacent sliders 3 being different, and the distance between one slider and the other gradually increasing or decreasing, depending on the rotation direction of the transmission rod 2. For example, when the transmission rod 2 rotates clockwise, the distance between two adjacent sliders 3 gradually increases; when the transmission rod 2 rotates counterclockwise, the distance between two adjacent sliders 3 gradually decreases. Thus, any two adjacent sliders 3 cause the distance between the two connected circular blades 4 to gradually increase or decrease, achieving adjustable distance between the circular blades 4. Similarly, the distance between multiple adjacent circular blades 4 can be adjusted. It should be noted that although the distance between multiple adjacent circular blades 4 is adjustable, the distance between any two adjacent circular blades 4 remains the same during adjustment. That is, the distance between multiple circular blades 4 increases or decreases simultaneously, ensuring that the spacing between any two adjacent circular blades 4 is the same. Simultaneously, the two sliders 3 closest to the midpoint on the first spiral groove section 21 and the second spiral groove section 22 slide in opposite directions, and the distance between these two sliders 3 changes synchronously with the distance between any two adjacent circular blades 4 on the first spiral groove section 21 and the second spiral groove section 22, with the same change value.

[0028] In an optional embodiment, a guide rod 6 is arranged parallel to and opposite to the transmission rod 2. When the slider 3 slides on the helical groove, the circular blade 4 moves synchronously along the guide rod 6, improving the smoothness of the movement of the circular blade 4. In addition, two discs 1 are located on both sides of the axial direction of the transmission rod 2. The first helical groove section 21 and the second helical groove section 22 on the transmission rod 2 both extend helically. That is to say, the slider 3 can slide continuously along the first helical groove section 21 and the second helical groove section 22. The discs 1 can prevent the slider 3 from falling out and prevent the slider 3 from excessive displacement.

[0029] In an optional embodiment, the guide rod 6 may be provided with a scale. By reading the scale between adjacent circular blades, the distance between adjacent circular blades can be determined, making the adjustment process of the circular blade 4 more intuitive and helping to save adjustment time.

[0030] The chip removal mechanism includes multiple chip removal hoods 5, a suction pipe assembly, and a chip collection box 13.

[0031] The chip suction hood 5 is a structural component used to collect the chips generated during slitting. It is generally plate-shaped, with multiple chip suction hoods 5 corresponding one-to-one with multiple circular blades 4 mounted on the shaft of the circular blades 4. The chip suction hood 5 has a through-hole groove allowing the transmission rod 2 to rotate, and an airflow channel for accommodating the circular blades 4. Under negative pressure, diaphragm chips can enter the airflow channel from the diaphragm slitting position. In this embodiment, a gap is left between the airflow channel and the circular blades 4. The size of the gap can be designed according to the maximum size of the chips. It is understood that the smaller the gap, the faster the airflow velocity around the gap, the stronger the capture ability of small diaphragm chip particles, and the better the chip removal effect. As an example, the gap size between the airflow channel and the circular blades 4 is 1-5 mm.

[0032] In this embodiment, the circular blade 4 includes a mounting portion and a cutting portion. The mounting portion is mounted on the slider 3 and partially located within the airflow channel of the chip suction hood 5. The cutting portion is located outside the mounting portion and is used to cut the diaphragm. The thickness of the cutting portion is less than the thickness of the mounting portion. Thus, the mechanical strength of the mounting portion is greater than that of the cutting portion, preventing breakage due to the circular blade 4 pushing the chip suction hood 5 and ensuring the service life of the circular blade 4.

[0033] Considering the specifications of the end products, when product specifications are switched, the gap between two adjacent circular blades 4 needs to be adjusted to cut the diaphragm into a specific width. Since the chip suction hood 5 is set corresponding to the circular blades 4, the position of the chip suction hood 5 also needs to be adjusted after the position of the circular blades 4 is adjusted. Therefore, the device is equipped with a sliding mechanism, which allows the chip suction hood 5 to move axially along the transmission rod 2 with the circular blades 4.

[0034] The sliding mechanism includes a linear guide rail and a support base 7. The linear guide rail extends axially along the transmission rod 2, and the support base 7 is slidably connected to the linear guide rail. The dust collection cover 5 is fixedly mounted on the support base 7 by a mounting component. The support base 7 and the linear guide rail are fixed together by a locking bolt 8. Thus, when adjusting the distance between two adjacent circular blades 4, the locking bolt 8 is loosened. During the rotation of the transmission rod 2, the slider 3 drives the circular blades 4 to move linearly. The circular blades 4 push the dust collection cover 5 and the support base 7 along the linear guide rail, meaning the circular blades 4 and the dust collection cover 5 can move synchronously, eliminating the need for subsequent adjustments to the distance between the dust collection covers 5. It should be noted that when adjusting the two circular blades 4 to the predetermined distance, the transmission rod 2 needs to be rotated a certain distance further, and then rotated in the opposite direction to disengage the dust collection cover 5 from the circular blades 4, ensuring that the circular blades 4 can rotate stably with the disc 1.

[0035] The suction duct assembly includes a main suction duct 10 and multiple branch suction ducts 9. To simplify the structure of the device, the linear guide rail can be designed as a duct structure, i.e., the support base 7 is slidably connected to the main suction duct 10, and the support base 7 and the main suction duct 10 are locked together by locking bolts. The dust collection hood 5 is connected to the main suction duct 10 through the branch suction ducts 9. The branch suction ducts 9 adopt a flexible conduit structure to ensure that the dust collection hood 5 and the main suction duct 10 remain in a connected state. In the branch suction ducts 9, the air containing debris flows from the dust collection hood 5 side to the main suction duct 10 side.

[0036] The chip collection box 13 is used to collect and store chip debris. To facilitate observation of the chip collection process, the chip collection box 13 can be made of transparent material. The chip collection box 13 is connected to the main suction duct 10 via an air pipe 11. In the air pipe 11, air containing chip debris flows from the main suction duct 10 side to the chip collection box 13 side. The chip collection box 13 is also connected to a vacuum suction pipe 12 to a vacuum pumping device 14. The vacuum pumping device 14 creates a pressure difference within the chip collection box 13, allowing diaphragm debris from the self-suction chip hood 5 to smoothly enter the chip collection box 13 through the air pipe 11. In this embodiment, the length of the vacuum suction pipe 12 extending into the chip collection box 13 is 100-140 mm shorter than the length of the air pipe 11 extending into the chip collection box 13. This reduces the possibility of diaphragm debris particles being sucked into the vacuum suction pipe 12, lowering the risk of diaphragm debris and particles contaminating the vacuum suction pipe 12.

[0037] The working principle of the diaphragm slitting device in this embodiment is explained below:

[0038] Loosen the locking element 17 to allow the transmission rod 2 to rotate relative to the disc 1. Rotate the transmission rod 2, which drives the sliders 3 located in the first spiral groove section 21 and the second spiral groove section 22 to slide in opposite directions. The two adjacent sliders 3 drive the two circular blades 4 respectively. During the movement, the circular blades 4 push the corresponding chip suction hood 5. When the distance between the two adjacent circular blades 4 is slightly greater than the width of the diaphragm to be cut, rotate the transmission rod 2 in the opposite direction. After the distance between the two adjacent circular blades 4 is consistent with the width of the diaphragm to be cut, tighten the locking element 17 to fix the transmission rod 2 on the disc 1. Drive the disc 1 to rotate through the motor 16. The disc 1 drives the circular blades 4 to rotate. During the rotation, the circular blades 4 cut the diaphragm into a specific width. At the same time as cutting the diaphragm, start the vacuum device 14. Under the action of vacuum suction, the debris and particles generated by cutting the diaphragm enter the chip suction hood 5 around the diaphragm cutting position and then enter the chip collection box 13 through the suction pipe assembly. When the chip collection box 13 is filled with diaphragm debris, maintenance personnel need to clean the chip collection box 13 regularly to keep the pipeline unobstructed.

[0039] In summary, the diaphragm slitting device proposed in this invention allows for adjustment of the distance between multiple sliders 3, meeting the requirements of simultaneous pitch and displacement of multiple circular blades 4 and the chip suction hood 5, saving adjustment time and improving operational efficiency. Furthermore, during the slitting process, a vacuum negative pressure air duct effectively removes micron-sized debris generated during slitting, effectively solving the problem of debris residue during diaphragm slitting and contributing to improved product yield and quality.

[0040] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A diaphragm spreader slitting device characterized by, The application relates to a diaphragm variable-pitch slitting device, which comprises a pair of discs, a transmission rod for transmission connection between the pair of discs, the transmission rod being rotatable relative to the discs, the transmission rod being fixed with the discs through locking members, the transmission rod comprising a middle section, first and second helical groove sections being symmetrically distributed and helically extended on the circumferential wall of the transmission rod relative to the middle section, and the interval between adjacent groove sections of the first and second helical groove sections gradually changes along the axial direction of the transmission rod. A driving mechanism is drivingly connected with the discs for driving the discs to rotate around their own axes. A slitting assembly comprises a sliding block and a circular blade connected to the sliding block, the sliding block being sleeved on the transmission rod and being slidable on the helical grooves.

2. The diaphragm variable-pitch slitting device according to claim 1, wherein the interval between adjacent groove sections of the first and second helical groove sections gradually widens along the axial direction from the middle position.

3. The diaphragm variable-pitch slitting device according to claim 1, wherein the driving mechanism comprises a motor, and the motor is transmission-connected with the discs through a belt wheel.

4. The diaphragm variable-pitch slitting device according to claim 3, wherein the motor is a self-locking motor.

5. The diaphragm variable-pitch slitting device according to claim 1, wherein a guide rod is further fixedly connected between the pair of discs, the guide rod extending along the axial direction of the transmission rod, and the circular blade is slidingly connected to the guide rod.

6. The diaphragm variable-pitch slitting device according to claim 5, wherein the guide rod is provided with a scale along its axial direction.

7. The diaphragm variable-pitch slitting device according to claim 1, wherein the locking member has a fixed part and a movable part, the fixed part being connected to the transmission rod, the end surface of the disc being provided with a clamping groove, and the movable part being connected to the fixed part at one end and being capable of being clamped in the clamping groove of the disc at the other end.

8. The diaphragm variable-pitch slitting device according to claim 1, wherein the circular blade is provided with an axial hole penetrating through the circular blade and through which the transmission rod passes, and the circular blade is connected to the sliding block in an integrated manner through bolts. ​ ​ ​ ​ ​ ​ ​ ​

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