CN217426845U

CN217426845U - Needle winding mechanism

Info

Publication number: CN217426845U
Application number: CN202220745541.7U
Authority: CN
Inventors: 叶宗锋; 张永胜; 邱毅
Original assignee: Suzhou Jieruisi Intelligent Technology Co ltd
Current assignee: Suzhou Jieruisi Intelligent Technology Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-09-13
Anticipated expiration: 2032-04-01

Abstract

The utility model discloses a roll up needle mechanism, including rolling up the needle file, installing a pair of first volume needle on rolling up the needle file, the direction that two first volume needles kept away from each other has a second to roll up the needle respectively sliding connection. A plurality of guiding pieces are arranged between the first winding needle and the second winding needle. The guide piece comprises a guide surface and a guide groove, wherein the guide surface forms an included angle with the axial direction of the needle rolling mechanism, and the guide groove is matched with the shape of the guide surface. When the second winding needle is driven to move along the axial direction, the guide groove and the guide surface move relatively to change the circumference of the needle winding mechanism. The guide piece is additionally arranged between the first winding needle and the second winding needle, so that the second winding needle moves along the axial direction of the winding needle mechanism, the guide surface of the guide piece converts the axial movement of the second winding needle into radial movement, and the circumference of the winding needle is conveniently increased or decreased.

Description

Needle winding mechanism

Technical Field

The utility model belongs to lithium cell automation equipment field especially relates to a roll up needle mechanism.

Background

The production of the battery core is to wind the positive plate material belt, the negative plate material belt and the diaphragm material belt in sequence to form a winding body, and the tab is a metal conductor which leads the positive and negative electrodes out of the battery core. Due to the difference of welding or shearing precision of the tabs, the tabs of the wound battery cell may have a dislocation condition, and further the quality of the battery cell is affected, so the winding equipment needs to be provided with a winding needle mechanism capable of changing the circumference of the winding needle.

The circumference of a winding needle can be changed by the winding needle mechanism adopted at present, but most of structures are complex, and the adjustment of the circumference of the winding needle is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a roll up needle mechanism of needle week length is rolled up in simple structure, convenient adjustment.

In order to achieve the above object, the utility model discloses a roll up needle mechanism is including rolling up the needle file, installing a pair of first book needle on rolling up the needle file, the direction that a pair of first book needle kept away from each other has a second to roll up the needle respectively sliding connection. A plurality of guiding pieces are arranged between the first winding needle and the second winding needle. The guide piece comprises a guide surface and a guide groove, wherein the guide surface forms an included angle with the axial direction of the needle winding mechanism, and the guide groove is matched with the guide surface in shape. When the second winding needle is driven to move along the axial direction, the guide groove and the guide surface move relatively to change the circumference of the needle winding mechanism.

In an embodiment of the present invention, the guide surface is disposed on the first winding needle, the guide groove is disposed on the second winding needle, and the guide surface is correspondingly disposed in the guide groove.

In an embodiment of the present invention, the winding pin mechanism further includes a pushing block, and the pushing block is used for applying a force moving along the axial direction to the second winding pin.

In an embodiment of the needle winding mechanism of the present invention, the longitudinal section of the guide member and the guide groove along the axial direction is triangular, and the longitudinal section along the radial direction is dovetail-shaped.

In an embodiment of the needle winding mechanism of the present invention, the guide is a guide post.

In an embodiment of the needle winding mechanism, the guide is detachably connected to the first winding needle.

In an embodiment of the needle winding mechanism of the present invention, the end of the second winding needle close to the winding needle seat is connected to the winding needle seat through the first elastic member.

In an embodiment of the needle winding mechanism of the present invention, the needle winding mechanism further includes a front needle nozzle, the front needle nozzle has an annular protrusion, a circular pushing block is disposed in the annular protrusion, and the pushing block and the annular protrusion form an annular accommodating space for accommodating a free end of the first winding needle; the push block is used for pushing the second winding needle to slide along the axial direction of the winding needle mechanism.

In an embodiment of the needle winding mechanism of the present invention, the pushing block is provided with an annular abutting portion contacting with the second winding needle.

In an embodiment of the present invention, the free end of the first winding pin is inserted into the annular accommodating space to form a space with the push block.

To sum up, the utility model discloses a roll up needle mechanism is through increasing the guide on the basis of current structure between first volume needle and second book needle, roll up the needle at the second and roll up and set up first elastic component between the needle holder, ejector pad and first elastic component coact in the second and roll up the needle, make the second roll up the needle along rolling up needle mechanism axial direction and removing, the axial displacement that the needle was rolled up to the second is turned into radial movement to the spigot surface of guide, increases and decreases and roll up the needle girth, simple structure, convenient the regulation.

Drawings

FIG. 1 is a structural diagram of the needle winding mechanism of the present invention;

FIG. 2 is a cross-sectional view taken along section line A-A of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along section line B-B of FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along section line A-A of FIG. 1 according to a second embodiment of the present invention;

fig. 5 is a partially enlarged view of fig. 4.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1 and 2, the needle winding mechanism includes a needle winding base 100, a pair of first winding needles 200 disposed in parallel on the needle winding base 100, and a second winding needle 300 slidably connected to the pair of first winding needles 200 in a direction away from each other. The first winding needle 200 includes an inner winding needle 210 and a middle winding needle 220, the middle winding needle 220 is connected to the corresponding second winding needle 300, the inner winding needles 210 are respectively disposed at the opposite inner sides of the two middle winding needles 220, and a gap through which a feeding tape passes is formed between the two inner winding needles 210.

One of the inner winding needles 210 can be controlled to be close to or far away from the other inner winding needle 210 to clamp or release the material belt; one of the middle winding needles 220 can be controlled to be far away from or close to the other middle winding needle 220 so as to form the reference size of the wound battery cell or slightly smaller than the reference size, and the battery cell blanking is facilitated. There are many designs for achieving this effect in the prior art, which are not directly related to the innovative features of the present invention and therefore will not be described in detail here.

When the needle rolling mechanism extends out, the needle rolling mechanism is inserted into a front needle nozzle 400, and a push block 410 is fixedly arranged on the front needle nozzle 400. One end of the second winding pin 300 contacts with the pushing block 410, and the other end is connected with the winding pin base 100 through the first elastic member 310. The first elastic member 310 is preferably a spring.

As shown in fig. 2 to 3, is a first embodiment of the present invention. A plurality of guides 500 are disposed between the middle winding needle 220 and the second winding needle 300. The guide member 500 forms an included angle with the axial direction of the needle winding mechanism to form a guide surface 510, the second winding needle 300 is provided with a guide groove 520 matched with the guide member 500, and the middle winding needle 220 and the second winding needle 300 are slidably connected with the guide groove 520 through the guide member 500.

The pushing block 410 pushes the second winding needle 300 to slide along the axial direction of the winding needle mechanism, so that the second winding needle 300 slides along the guide surface 510 and is driven to slide along the radial direction of the winding needle mechanism. The first elastic member 310 is provided to reset the second winding pin 300. The first elastic member 310 and the pushing block 410 act together on the second winding needle 300 to push the second winding needle 300 to slide smoothly in the axial direction. During the sliding process, the second winding needle 300 slides along the radial direction due to the guide surface 510, so as to adjust the circumference of the winding needle mechanism.

The guide 500 is provided on the middle winding needle 220. In this embodiment, the guide 500 and the middle winding needle 220 are fixed together by screws, and in other embodiments, the guide 500 may be formed by directly machining on the middle winding needle 200. In this embodiment, the longitudinal sections of the guide member 500 and the guide groove 520 in the axial direction are triangular, the guide surface 510 is an inclined surface, and the longitudinal sections of the guide member 500 and the guide groove 520 in the radial direction are dovetail-shaped, so that the stability of the second winding needle 300 sliding relative to the middle winding needle 220 is ensured, and the guide precision is improved.

The front needle nozzle 400 is provided with an annular convex part 420 facing the center of the surface of the needle rolling mechanism, and the push block 410 is annular and is sleeved on the annular convex part 420 and fixedly connected with the front needle nozzle 400 through a plurality of screws. The push block 410 and the annular protrusion 420 form an annular receiving space, into which the free end of the middle winding needle 220 is inserted, and form an adjustment gap 430 with the front needle tip 400 without the first elastic member 310 being forced.

The pushing block 410 is provided with an annular pushing portion 440 contacting with the second winding pin 220, so as to conveniently control the axial moving distance of the second winding pin 220. The annular pushing part 440 extends out of the pushing block 410, so that the moving distance of the front needle nozzle 400 can be shortened, the time is saved and the working efficiency is improved under the condition of the same driving speed.

The process of the needle winding mechanism of this embodiment for adjusting the circumference of the winding needle is:

first, the needle winding mechanism is extended, the free end of the middle winding needle 220 is inserted into the receiving space of the front needle tip 400, and the free end of the second winding needle 300 is in contact with the surface of the annular abutment 440.

Then, according to the detected deviation tendency of the tab, the pushing block 410 and the first elastic member 310 together drive the second winding pin 300 to move along the axial direction of the winding pin mechanism. As shown in fig. 2, the guide surface 510 extends in the winding needle extending direction to be inclined toward the winding needle. When the circumference of the needle rolling mechanism needs to be increased, the front needle nozzle 400 drives the push block 410 to move towards the direction close to the needle rolling seat 100, the first elastic part 310 is compressed, and the second rolling needle 300 moves towards the direction far away from the middle rolling needle 220 under the guidance of the guide surface 510, so that the circumference of the needle rolling mechanism is increased; when the circumference of the needle rolling mechanism needs to be reduced, the front needle mouth drives the push block 410 to move towards the direction away from the needle rolling seat 100, the first elastic element 310 pushes the second rolling needle 300 to move reversely, and the second rolling needle 300 moves towards the direction close to the middle rolling needle 220 under the guidance of the guide surface 510, so that the circumference of the needle rolling mechanism is reduced.

Finally, the tape is inserted into the gap between the two inner winding needles 210, and the two inner winding needles 210 clamp the tape. Meanwhile, one of the middle winding needles 220 is controlled to be away from the other middle winding needle 220, and further drives the corresponding second winding needle 300 to be away from the other second winding needle 300, so as to form the reference size of the wound battery cell. After the material belt is clamped, the winding needle mechanism is driven to rotate around the axis of the winding needle mechanism to wind the battery cell.

As shown in fig. 4 and 5, in the second embodiment of the present invention, the difference between the second embodiment and the first embodiment is that the guide 600 is provided as a guide post, which is detachably fixed to the middle winding pin 220.

The middle winding needle 220 is provided with a plurality of oblique through holes, the angle of each oblique through hole is the same as that of the guide piece 600, the guide piece 600 is a guide pillar and is inserted into the oblique through holes, the guide piece 600 is connected with the oblique through holes in a threaded manner, a buckle manner and the like, the guide piece 600 can be fixed on the middle winding needle 220, and the specific connection manner is selected according to actual requirements. The guide groove 610 is an oblique cylindrical groove formed in the second winding pin 220, and the guide surface 620 formed by the guide 600 is an oblique cylindrical surface. The guide member 600 and the guide groove 610 in this way are convenient to process and install, and can also guide the second winding pin 220 to adjust the circumference of the winding pin mechanism.

In this embodiment, since the guide 600 is a guide post, an oblique through hole needs to be formed in the middle winding needle 220, and therefore, the middle winding needle 220 is wider. In order to avoid the pushing block 410 driving the middle winding needle 220 to move when pushing the second winding needle 300, the free end of the middle winding needle 220 is processed with a clearance part, and the free end of the middle winding needle 220 is inserted into the annular accommodating space to form a clearance space 490 with the pushing block 410. Such an arrangement enables adjustment of a wider winding needle circumference.

The process of adjusting the circumference of the winding needle in this embodiment is similar to that in the first embodiment, and details are not repeated.

To sum up, the utility model discloses improve on the basis of current book needle mechanism, conveniently adjust the girth of rolling up the needle, simple structure, the suitability is strong to can guarantee interior book needle evenly clamped material area and can not damage the material area.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A needle rolling mechanism comprises a needle rolling seat and a pair of first rolling needles arranged on the needle rolling seat, wherein the directions of the first rolling needles, which are far away from each other, are respectively connected with a second rolling needle in a sliding manner; the winding machine is characterized in that a plurality of guide pieces are arranged between the first winding needle and the second winding needle; the guide piece comprises a guide surface forming an included angle with the axial direction of the needle winding mechanism and a guide groove matched with the shape of the guide surface; when the second winding needle is driven to move along the axial direction, the guide groove and the guide surface move relatively to change the circumference of the needle winding mechanism.

2. The needle winding mechanism of claim 1, wherein the guide surface is disposed on the first winding needle, the guide groove is disposed on the second winding needle, and the guide surface is correspondingly disposed in the guide groove.

3. The needle winding mechanism of claim 1, further comprising a push block for applying a force to the second winding needle that moves in the axial direction.

4. The needle winding mechanism according to claim 1, wherein the guide member and the guide groove have a triangular longitudinal section in the axial direction and a dovetail longitudinal section in the radial direction.

5. The needle winding mechanism of claim 1 wherein said guide is a guide post.

6. The needle winding mechanism of claim 1, wherein the guide is removably coupled to the first needle.

7. The needle winding mechanism of claim 1, wherein an end of the second winding needle adjacent to the winding needle seat is connected with the winding needle seat through a first elastic member.

8. The needle winding mechanism according to claim 1, further comprising a front needle nozzle having an annular protrusion, wherein an annular pushing block is disposed in the annular protrusion, and the pushing block and the annular protrusion form an annular receiving space for receiving the free end of the first winding needle; the push block is used for pushing the second winding needle to slide along the axial direction of the winding needle mechanism.

9. The needle winding mechanism according to claim 8, wherein the push block is provided with an annular abutting portion which contacts the second winding needle.

10. The needle winding mechanism according to claim 8 or 9, wherein the free end of the first winding needle is inserted into the annular accommodating space to form a space for avoiding the free end of the first winding needle with the pushing block.