CN218975497U

CN218975497U - Outer diameter adjusting structure of winding needle

Info

Publication number: CN218975497U
Application number: CN202223153968.7U
Authority: CN
Inventors: 杨江鹏; 严海宏; 姜小虎; 曾令辉; 蒋超平
Original assignee: Dongguan Yakang Precision Machinery Co Ltd
Current assignee: Dongguan Yakang Precision Machinery Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-05-05
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a winding needle outer diameter adjusting structure which comprises a large plate, a substrate, a winding mechanism, a blanking mechanism and a winding needle outer diameter resetting mechanism, wherein the large plate and the substrate are oppositely arranged; the winding needle assembly is of a two-half winding needle structure, the winding needle structure comprises a first baffle plate and a second baffle plate which are oppositely arranged, an outer winding needle, an inner winding needle and two push rod linkage structures, the outer winding needle, the inner winding needle and the two push rod linkage structures are arranged between the first baffle plate and the second baffle plate, the outer winding needle is located on the inner winding needle, the two push rod linkage structures are oppositely located on two sides of the inner winding needle, and the two push rod linkage structures are in transmission connection with the inner winding needle. According to the utility model, the circumference of the outer contour of the winding needle can be changed while the battery core is wound, and when the tabs are not aligned, the distance difference between the tabs during winding of the battery core can be eliminated by changing the circumference of the winding needle, so that the edges of the tabs are aligned.

Description

Outer diameter adjusting structure of winding needle

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a winding needle outer diameter adjusting structure.

Background

Most of the winding mechanisms in the existing full-automatic winding equipment adopt a two-half winding needle structure, wherein one half of winding needles can longitudinally move forwards and backwards relative to the other half of winding needles; half of the winding needles are fixedly connected with the motor to serve as driving winding needles, the other half of the winding needles are serving as driven winding needles, can axially move relative to the half connected with the motor and can be completely removed (drawn off), and the winding electric core is rotated under the drive of the motor; the middle of the two halves of the winding needle is provided with a gap, the diaphragm passes through the gap and is wound together with the winding needle, the winding needle is drawn out from the winding core (a product of which the positive electrode sheet, the negative electrode sheet and the diaphragm are wound together) during needle drawing, and the winding needle is separated from the winding core.

In the winding process, if the edges of the tabs are not aligned, the produced battery core will not meet the requirements, and the structure of the existing winding mechanism cannot ensure that the edges of the pole pieces are always aligned in the winding process.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a rolling needle outer diameter adjusting structure.

The technical scheme of the utility model is as follows:

the winding mechanism comprises a winding needle seat, a winding needle outer diameter adjusting driving assembly and a winding needle assembly which are sequentially arranged towards the direction of the substrate;

the winding needle assembly is of a two-half winding needle structure, the winding needle structure comprises a first baffle plate and a second baffle plate which are oppositely arranged, an outer winding needle, an inner winding needle and two push rod linkage structures, wherein the outer winding needle, the inner winding needle and the two push rod linkage structures are arranged between the first baffle plate and the second baffle plate, the inner winding needle is movably arranged between the first baffle plate and the second baffle plate up and down, the outer winding needle is arranged on the inner winding needle, the two push rod linkage structures are oppositely arranged on two sides of the inner winding needle and are in transmission connection with the inner winding needle to drive the inner winding needle to move up and down, and a first bullseye bearing and a second bullseye bearing which correspond to two ends of the push rod linkage structures are respectively arranged on the first baffle plate and the second baffle plate;

the rolling needle outer diameter adjusting driving assembly comprises two first cylinders which are arranged up and down oppositely, a cylinder shaft of each first cylinder is connected with a push plate, and the push plates correspond to the first bullseye bearings;

and the substrate is provided with a sliding shaft corresponding to the rolling needle outer diameter reset mechanism and the second bullseye bearing respectively.

Further, the inner winding needle is provided with a guide post, and the outer winding needle is connected with the guide post through a screw.

Further, a dense bead sleeve is sleeved outside the guide post.

Further, the push rod linkage structure comprises a first linear bearing, a second linear bearing, a push rod, an adapter plate, a connecting rod and a rotating bearing, wherein the first linear bearing and the second linear bearing are respectively arranged on the first baffle and the second baffle, the push rod movably penetrates through between the first linear bearing and the second linear bearing, one end of the connecting rod is connected with the inner winding needle through the rotating bearing, and the other end of the connecting rod is connected with the push rod through the adapter plate.

Further, the push rod linkage structure further comprises a first blocking block, a second blocking block and a spring sleeved on the push rod, wherein the first blocking block and the second blocking block are oppositely arranged, and the spring is located between the first blocking block and the second blocking block.

Further, the push rod is connected with the adapter plate through a screw.

Further, the needle outer diameter resetting mechanism comprises a linear module, a second cylinder and a track bearing, wherein the second cylinder is movably arranged on the linear module, a cylinder shaft of the second cylinder is connected with the track bearing, and the track bearing is movably arranged at one end of the sliding shaft.

Compared with the prior art, the utility model has the beneficial effects that:

the outer diameter adjusting structure of the winding needle can change the outer contour perimeter of the winding needle when the battery cell is wound, and can eliminate the distance difference between the tabs when the battery cell is wound by changing the perimeter of the winding needle when the tabs are not aligned, so that the edges of the tabs are aligned.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a structure for adjusting the outer diameter of a winding needle according to the present utility model;

FIG. 2 is a cross-sectional view of a winding mechanism according to the present utility model;

fig. 3 is an internal structural view of the winding mechanism 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.

In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.

Examples

Referring to fig. 1 to 3, the present embodiment provides a rolling needle outer diameter adjusting structure, which includes a large plate 1 and a base plate 2 disposed opposite to each other, a winding mechanism 3 disposed on the large plate 1, a discharging mechanism 4, and a rolling needle outer diameter resetting mechanism 5 disposed on the base plate 2. The winding mechanism 3 comprises a winding needle seat 31, a winding needle outer diameter adjusting driving component 32 and a winding needle component 33 which are sequentially arranged towards the direction of the substrate 2; the winding needle component 33 is a two-half winding needle structure, the winding needle structure comprises a first baffle 331 and a second baffle 332 which are oppositely arranged, an outer winding needle 333, an inner winding needle 334 and two push rod linkage structures, wherein the outer winding needle 333, the inner winding needle 334 and the two push rod linkage structures are arranged between the first baffle 331 and the second baffle 332, the inner winding needle 334 is movably arranged between the first baffle 331 and the second baffle 332 up and down, the outer winding needle 333 is arranged on the inner winding needle 334, a guide post 336 is arranged on the inner winding needle 334, a sealing bead sleeve 337 is sleeved outside the guide post 336, the outer winding needle 333 and the guide post 336 are connected through screws, the two push rod linkage structures are oppositely arranged on two sides of the inner winding needle 334 and are in transmission connection with the inner winding needle 334 to drive the inner winding needle 334 to move up and down, the push rod linkage structures comprise a first linear bearing 3351, a second linear bearing 3352, a push rod 3353, an adapter plate 3354, a connecting rod 3355, a rotating bearing 3356, a first blocking block 3357, a second blocking block 3358 and a spring 3359, the first linear bearing 3351 and the second linear bearing 3352 are respectively arranged on the first baffle 331 and the second baffle 332, the push rod 3353 is movably arranged between the first linear bearing 3351 and the second linear bearing 3352 in a penetrating way, one end of the connecting rod 3355 is connected with the inner winding needle 334 through the rotating bearing 3356, the other end of the connecting rod 3355 is connected with the push rod 3353 through the adapter plate 3354 (the push rod 3353 is connected with the adapter plate 3354 through a screw), the first blocking block 3357 and the second blocking block 3358 are oppositely arranged, the spring 3359 is sleeved on the push rod 3353 and is positioned between the first blocking block 3357 and the second blocking block 3358, and the first baffle 331 and the second baffle 332 are respectively provided with a first bullseye bearing 338 and a second bullseye bearing 339 which correspond to two ends of the push rod 3353; the rolling needle outer diameter adjusting driving assembly 32 comprises two first air cylinders 321 which are arranged up and down oppositely, the air cylinder shafts of the first air cylinders 321 are connected with push plates 322, and the push plates 322 correspond to the first bullseye bearings 338; the substrate 2 is provided with a sliding shaft 6 corresponding to the rolling needle outer diameter reset mechanism 5 and the second bullnose bearing 339 respectively, the rolling needle outer diameter reset mechanism 5 comprises a linear module 51, a second cylinder 52 and a track bearing 53, the second cylinder 52 is movably arranged on the linear module 51, a cylinder shaft of the second cylinder 52 is connected with the track bearing 53, and the track bearing 53 is movably arranged at one end of the sliding shaft 6.

Working principle: the first cylinder 321 stretches out, the push rod 3353 is pushed to move rightwards through the first bullseye bearing 338, the connecting rod swings rightwards, and the outer rolling needle is driven to move outwards along the direction of the guide post 336 through the adapter plate 3354, so that the outline of the outer rolling needle 333 reaches the maximum position (namely, the outer diameter of the rolling needle is at the maximum position); after the winding needle rotates to the winding position, the second cylinder 52 stretches out to push the sliding shaft 6, the push rod 3353 is pushed by the second bullnose bearing 339 to drive the connecting rod 3355 to swing leftwards, the outer winding needle 333 moves inwards along the direction of the guide post 336, and the outline of the outer winding needle 333 is positioned at the middle position; the linear module 51 moves leftwards, the connecting rod 3355 is pushed to swing leftwards by the second bullseye bearing 339, the outer winding needle 333 moves inwards along the direction of the guide post 336, and the outline of the outer winding needle 333 is reduced; the linear module 51 moves rightwards, the first cylinder 321 pushes the connecting rod 3355 to swing rightwards through the first bullseye bearing 338, the outer winding needle 333 moves outwards along the direction of the guide post 336, and the outline of the outer winding needle 333 becomes larger. The outline of the outer winding needle 333 is controlled by the linear module 51 to be enlarged and reduced so as to adapt to the alignment of tabs in the process of winding the battery cells, the second cylinder 52 is reset after the battery cells are wound, the linear module 51 is reset, the station rotation switching is completed, and meanwhile, the first cylinder 321 pushes the push rod 3353 to enlarge the outline of the outer winding needle 333, so that the battery cells cannot relatively displace with the winding needle.

The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a needle external diameter adjusts structure which characterized in that: the automatic winding machine comprises a large plate, a substrate, a winding mechanism, a blanking mechanism and a winding needle outer diameter resetting mechanism, wherein the large plate and the substrate are oppositely arranged, the winding mechanism is arranged on the large plate, the winding mechanism is arranged on the substrate, and the winding mechanism comprises a winding needle seat, a winding needle outer diameter adjusting driving assembly and a winding needle assembly which are sequentially arranged towards the direction of the substrate;

2. The winding needle outer diameter adjusting structure according to claim 1, wherein: the inner winding needle is provided with a guide post, and the outer winding needle is connected with the guide post through a screw.

3. The winding needle outer diameter adjusting structure according to claim 2, wherein: and a dense bead sleeve is sleeved outside the guide post.

4. The winding needle outer diameter adjusting structure according to claim 1, wherein: the push rod linkage structure comprises a first linear bearing, a second linear bearing, a push rod, an adapter plate, a connecting rod and a rotating bearing, wherein the first linear bearing and the second linear bearing are respectively arranged on the first baffle and the second baffle, the push rod movably penetrates through between the first linear bearing and the second linear bearing, one end of the connecting rod is connected with the inner winding needle through the rotating bearing, and the other end of the connecting rod is connected with the push rod through the adapter plate.

5. The needle outer diameter adjustment structure according to claim 4, wherein: the push rod linkage structure further comprises a first blocking block, a second blocking block and a spring sleeved on the push rod, wherein the first blocking block and the second blocking block are oppositely arranged, and the spring is located between the first blocking block and the second blocking block.

6. The needle outer diameter adjustment structure according to claim 4, wherein: the push rod is connected with the adapter plate through a screw.

7. The winding needle outer diameter adjusting structure according to claim 1, wherein: the rolling needle outer diameter reset mechanism comprises a linear module, a second cylinder and a track bearing, wherein the second cylinder is movably arranged on the linear module, a cylinder shaft of the second cylinder is connected with the track bearing, and the track bearing is movably arranged at one end of the sliding shaft.