CN218975530U

CN218975530U - Automatic reducing winding needle structure for power winding

Info

Publication number: CN218975530U
Application number: CN202223058692.4U
Authority: CN
Inventors: 刘源春; 严海宏; 高佛清
Original assignee: Dongguan Yakang Precision Machinery Co Ltd
Current assignee: Dongguan Yakang Precision Machinery Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-05-05
Anticipated expiration: 2032-11-17

Abstract

The utility model relates to an automatic reducing winding needle structure for power winding, which comprises a mounting chassis and two winding needle half shafts, wherein the two winding needle half shafts are fixedly arranged on the mounting chassis, each winding needle half shaft comprises an outer needle, an inner needle, a reducing adjusting shaft and a reducing cam groove seat, the outer needle is fixedly arranged with the reducing cam groove seat, the reducing adjusting shaft moves on the inner needle, the reducing cam groove seat is provided with a cam groove, the reducing adjusting shaft is provided with a cam, and the cam moves in the cam groove. Above-mentioned automatic reducing needle structure is rolled up to power can make the cam remove along the cam groove through removing reducing regulating spindle to drive reducing cam groove seat and remove, and then remove the outer needle, thereby change diameter and the girth of needle structure are rolled up to the change, not only can make things convenient for the manipulator to press from both sides and get the electric core, prevent that the electric core from can't take out or lead to the electric core to produce the fold when taking out the electric core, can also guarantee that the pole piece from winding into the electric core after, can not cause the tab edge to be aligned because of the thickness difference of pole piece, avoid causing the lithium cell electric core to scrap.

Description

Automatic reducing winding needle structure for power winding

Technical Field

The utility model relates to the technical field of lithium battery production, in particular to an automatic diameter-changing winding needle structure for power winding.

Background

In the manufacturing process of the lithium battery cell, the pole piece and the diaphragm are rolled into the cell according to certain requirements through a series of actions of the winding head module. The alignment degree of the lugs on the pole pieces is an important parameter of the quality of the battery cell, sometimes the produced lithium battery cell is scrapped because the edges of the positive pole lugs and the negative pole lugs on the side edges of the battery cell are not aligned due to the difference of the thickness of the pole pieces, and the circumference of the winding needle is changed to be a method for aligning the lugs.

At present, in the lithium battery industry or other winding industries, the winding needle is fixed, so that the winding diameter is fixed; when the winding diameter needs to be adjusted, the winding diameter of the winding needle can be increased or reduced only by replacing the winding needle or attaching a glue film on the winding needle, but the method is very time-consuming and labor-consuming, and the adjustment precision is very low. Thereby influencing the production quality of the battery cell and the overall production efficiency.

Disclosure of Invention

The utility model mainly aims to provide an automatic reducing winding needle structure for power winding, so as to solve the technical problems, and the mechanism can eliminate the distance difference between the tabs by rapidly changing the circumference of the winding needle when the tabs are not aligned, thereby aligning the tabs, ensuring the production quality of an electric core and improving the production efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an automatic reducing needle structure is rolled up to power, includes mounting chassis and two needle semi-axles that roll up, two needle semi-axles set firmly in on the mounting chassis, it includes outer needle, interior needle, reducing regulating spindle and reducing cam groove seat to roll up the needle semi-axle, outer needle with reducing cam groove seat sets firmly, reducing regulating spindle in interior needle is gone up and is removed, be provided with the cam groove on the reducing cam groove seat, be provided with the cam on the reducing regulating spindle, the cam in the cam inslot removes.

As a preferred solution, the cam groove is provided with two adjusting strokes, one of which has a length of 5mm and the other has a length of 15mm.

As an optimized technical scheme, a sliding groove is formed in the inner needle, a sliding block is arranged on the reducing adjusting shaft, the shape of the sliding block is matched with that of the sliding groove, and the sliding block moves along the sliding groove.

As an optimized technical scheme, the winding needle semi-axle also comprises a pressure spring, and the pressure spring is arranged between the mounting chassis and the reducing adjusting shaft.

As an optimized technical scheme, the winding needle semi-axle is further provided with an outer needle movable structure, and the outer needle movable structure is arranged between the outer needle and the installation chassis.

As a preferred technical scheme, outer needle movable structure is including outer needle mounting panel, guide rail, extension spring and screw, the guide rail install in on the installation chassis, outer needle mounting panel with outer needle sets firmly, the screw set firmly in the side of outer needle mounting panel, the both ends of extension spring set firmly with two outer needle movable structure's screw respectively.

The utility model has the beneficial effects that: above-mentioned automatic reducing needle structure is rolled up to power can make the cam remove along the cam groove through removing reducing regulating spindle to drive reducing cam groove seat and remove, and then remove the outer needle, thereby change diameter and the girth of needle structure are rolled up to the change, not only can make things convenient for the manipulator to press from both sides and get the electric core, lead to the electric core to produce the fold when preventing that the electric core can't take out or take out the electric core, can also guarantee that the pole piece is rolled up into the electric core after, can not lead to the fact anodal utmost point ear and the negative pole utmost point ear edge of electric core side to be aligned because of the thickness difference of pole piece to some extent, avoid causing the lithium cell electric core of production to scrap because of not conforming to the requirement, can guarantee electric core production quality, improve production efficiency. The mechanism has the advantages of simple structure, low cost, convenient installation, changeable stroke and high precision, and can reduce product scrapping and save machine adjustment time for a power winding machine in the lithium electricity industry.

Drawings

FIG. 1 is a schematic view of the structure of an automatic diameter-changing winding needle for power winding according to the present utility model;

FIG. 2 is a cross-sectional view of an automatic variable diameter winding needle structure for power winding according to the present utility model;

fig. 3 is a schematic structural view of a variable-diameter adjusting shaft and a variable-diameter cam groove seat according to the present utility model;

fig. 4 is a schematic structural view of a pre-reducing adjusting shaft and a reducing cam groove seat according to the present utility model;

fig. 5 is a schematic structural view of the post-reducing variable-diameter adjustment shaft and the reducing cam groove seat according to the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, an automatic reducing winding needle structure for power winding comprises a mounting chassis 1 and two winding needle half shafts 2, wherein the two winding needle half shafts 2 are fixedly arranged on the mounting chassis 1, and the two winding needle half shafts 2 form a winding needle main body of a winding surface.

As shown in fig. 1 and 2, the winding needle half shaft 2 includes an outer needle 21, an inner needle 22, a reducing adjusting shaft 23, a reducing cam groove seat 24, an air expansion shaft 25, an outer needle movable structure 26 and a pressure spring 27, wherein the outer needle 21 is fixedly arranged on the reducing cam groove seat 24, the outer needle 21 is connected with the mounting chassis 1 through the outer needle movable structure 26, the inner needle 22 is fixedly arranged on the mounting chassis 1, a sliding groove 221 is arranged on the inner needle 22, a sliding block 231 and a cam 232 are arranged on the reducing adjusting shaft 23, a cam groove 241 is arranged on the reducing cam groove seat 24, the cam 232 moves in the cam groove 241, the sliding block 231 is matched with the sliding groove 221 in shape, the sliding block 231 moves along the sliding groove 221, the reducing adjusting shaft 23 moves along the sliding groove 221 under the action of external force, and drives the cam 232 to move in the cam groove 241, and as the inner needle 22 is fixedly arranged on the mounting chassis 1, thereby pushing the reducing cam groove seat 24 to move away from the reducing adjusting shaft 23, and driving the outer needle 21 to move away from the inner needle 22, thereby adjusting the diameter and the circumference of the whole winding needle body, and the pressure spring 27 is arranged between the mounting chassis 23 and the adjusting shaft 23, and the winding adjusting shaft 23 is convenient to reset after the reducing adjusting shaft 23. The outer needle movable structure 26 comprises an outer needle mounting plate 262, a guide rail 261, a tension spring 263 and screws 264, the guide rail 261 is mounted on the mounting chassis 1, the outer needle mounting plate 262 is fixedly arranged with the outer needle 21, the outer needle 21 can move along the guide rail 261, the screws 264 are fixedly arranged on the side surface of the outer needle mounting plate 262, and two ends of the tension spring 263 are respectively fixedly arranged with the screws 264 of the two outer needle movable structures 26, so that the outer needle 21 can be reset conveniently.

As shown in fig. 3, fig. 4 and fig. 5, the cam groove 241 is provided with a first adjusting stroke 242 and a second adjusting stroke 243, the first adjusting stroke 242 is communicated with the second adjusting stroke 243, the length of the first adjusting stroke 242 is 5mm, the length of the second adjusting stroke 243 is 15mm, when the cam 232 moves along the first adjusting stroke 242, a manipulator can conveniently clamp a battery core, the battery core is prevented from being wrinkled when the battery core cannot be taken out or taken out, when the cam 232 moves along the second adjusting stroke 243, the diameter and the circumference of the winding needle main body can be adjusted, so that after a pole piece is wound into the battery core, the edge alignment of a positive electrode tab and a negative electrode tab on the side edge of the battery core cannot be caused due to the difference of the thickness of the pole piece, and the battery core of the lithium battery produced is prevented from being scrapped because of the battery core is not in accordance with the requirement. As shown in table 1, the cam 232 moves by the distance and the diameter and circumference of the needle body as the cam 232 moves through the first and

second adjustment strokes

242, 243.

Table 1 table of the moving distance of the cam in the first and second adjustment strokes and the diameter and circumference of the winding needle body

As shown in fig. 4 and 5, in the automatic diameter-variable winding needle structure of the power winding, before winding, the diameter-variable adjusting shaft 23 moves towards the installation chassis 1 along the chute 221 under the action of external force, drives the cam 232 to move in the cam groove 241, and makes the cam 232 move between the first adjusting stroke 242 and the second adjusting stroke 243, and because the inner needle 22 is fixed with the installation chassis 1, the diameter-variable cam groove seat 24 is pushed to move away from the diameter-variable adjusting shaft 23, and the outer needle 21 is driven to move away from the inner needle 22, so as to adjust the diameter of the whole winding needle body; when the winding starts, the cam 232 moves along the second adjusting stroke 243 under the action of external force according to the fed back thickness of the pole piece, so that the diameter and the perimeter of the winding needle main body are adjusted, and the edge alignment of the positive pole lug and the negative pole lug is ensured; when the winding is completed, the external force is removed from the reducing adjusting shaft 23, the reducing adjusting shaft 23 is reset under the action of the pressure spring 27, so that the cam 242 is reset to the position before the reducing, and the outer needle 21 is reset under the action of the tension spring 263.

The above embodiments are only preferred examples of the present utility model and are not intended to limit the scope of the present utility model, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims are included in the scope of the present utility model.

Claims

1. The utility model provides an automatic reducing needle structure is rolled up to power, includes mounting chassis and two needle semi-axles that roll up, two needle semi-axles set firmly in on the mounting chassis, its characterized in that, roll up needle semi-axle including outer needle, interior needle, reducing regulating spindle and reducing cam groove seat, outer needle with reducing cam groove seat sets firmly, the reducing regulating spindle in move on the interior needle, be provided with the cam groove on the reducing cam groove seat, be provided with the cam on the reducing regulating spindle, the cam in move in the cam groove.

2. The automatic variable diameter winding needle structure for power winding according to claim 1, wherein the cam groove is provided with two adjusting strokes, one of which has a length of 5mm and the other of which has a length of 15mm.

3. The automatic diameter-changing winding needle structure for power winding according to claim 1 or 2, wherein a sliding groove is formed in the inner needle, a sliding block is arranged on the diameter-changing adjusting shaft, the shape of the sliding block is matched with that of the sliding groove, and the sliding block moves along the sliding groove.

4. The automatic diameter-changing winding needle structure for power winding according to claim 3, wherein the winding needle semi-axis further comprises a compression spring, and the compression spring is arranged between the mounting chassis and the diameter-changing adjusting shaft.

5. The automatic variable diameter winding needle structure of claim 3, wherein the winding needle semi-axis further comprises an outer needle movable structure, and the outer needle movable structure is arranged between the outer needle and the installation chassis.

6. The automatic variable diameter winding needle structure of claim 5, wherein the outer needle movable structure comprises an outer needle mounting plate, a guide rail, a tension spring and screws, the guide rail is mounted on the mounting chassis, the outer needle mounting plate is fixedly arranged with the outer needle, the screws are fixedly arranged on the side face of the outer needle mounting plate, and two ends of the tension spring are fixedly arranged with the screws of the two outer needle movable structures respectively.