CN108649273B

CN108649273B - Winding needle device of winding machine

Info

Publication number: CN108649273B
Application number: CN201810458529.6A
Authority: CN
Inventors: 黄润生; 田丽华; 余良; 李立; 黄祥虎; 陈师光; 周灵; 田冰; 高云峰
Original assignee: Han s Laser Technology Industry Group Co Ltd
Current assignee: Shenzhen Han's Lithium Battery Intelligent Equipment Co ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2020-07-14
Anticipated expiration: 2038-05-14
Also published as: CN108649273A

Abstract

The invention relates to a needle winding device of a winding machine, which comprises a circular winding needle formed by splicing a plurality of carriers and a driving mechanism for driving the carriers to move, wherein the driving mechanism is in transmission connection with the carriers and can drive the carriers to move to form an elliptical winding needle. The winding needle device of the winding machine provided by the invention is formed by splicing a plurality of carriers, and keeps a circular state in the process of winding a pole piece. After the winding is finished, the carrier is driven by the driving mechanism to enable the winding needle to be changed into an oval shape from a round shape, and the shape required by the product is changed, so that the technological requirement is met. Because the winding process is in a circular state, the tension fluctuation in the winding process can be reduced, the winding speed is improved, the product quality can be improved, and the processing efficiency is greatly improved.

Description

Winding needle device of winding machine

Technical Field

The invention relates to the technical field of winding machines, in particular to a needle winding device of a winding machine.

Background

Because the final finished product shape of the electric core is square, in order to meet the requirement, the winding needle of manufacturers of the winding machine at present is generally designed to be elliptical or rhombic, however, the elliptical or rhombic shape can cause the sudden change of the linear velocity of the winding needle to cause the problems of overlarge tension fluctuation of the pole piece, difficult tension control and lower production performance of equipment.

As shown in FIG. 1, the winding needle 1 is flat and approximately elliptical, and if the main shaft of the winding needle 1 is at uniform angular velocity, the winding needle 1 is actually in cam motion. The winding speed of the winding needle 1 is a periodic line changing speed, and the tension is also periodically changed. The change of the tension directly affects the winding quality of the battery, and the problem that how to control the tension fluctuation and improve the winding quality and speed of the winding machine is always a difficult problem which troubles a large-square winding machine.

Disclosure of Invention

The invention aims to solve the technical problem of providing a needle winding device of a winding machine, and aims to solve the problems that the linear velocity of the needle winding device of the existing winding machine is suddenly changed, so that the tension fluctuation of a pole piece is overlarge, the tension is difficult to control, and the winding quality of a battery is influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the winding needle device of the winding machine comprises a circular winding needle formed by splicing a plurality of carriers and a driving mechanism for driving the carriers to move, wherein the driving mechanism is in transmission connection with the carriers and can drive the carriers to move to form the oval winding needle.

Furthermore, the number of the carriers is four, and the carriers are a left carrier and a right carrier which are oppositely arranged and an upper carrier and a lower carrier which are oppositely arranged; in an initial state, the four carriers are spliced into a circular winding needle; the driving mechanism can drive the left carrier and the right carrier to mutually approach along the radial direction and drive the upper carrier and the lower carrier to mutually depart from along the radial direction, so that the four carriers form an elliptical winding needle.

Furthermore, the driving mechanism comprises a left slide block, a right slide block, an upper slide block and a lower slide block, and the left carrier, the right carrier, the upper carrier and the lower carrier are respectively detachably mounted at one end of the left slide block, the right slide block, the upper slide block and the lower slide block; the needle winding device comprises a left slider, a right slider, an upper slider, a lower slider, a needle winding device and a needle winding device, wherein one ends of the left slider and the right slider, which are far away from a carrier, are respectively provided with a first through hole, one ends of the upper slider and the lower slider, which are far away from the carrier, are respectively provided with a second through hole, the needle winding device also comprises a first guide rod and a second guide rod, the first guide rod is slidably arranged in the first through hole, and the second guide rod; the first guide rod and the second guide rod are perpendicular to each other.

Furthermore, the inner walls of the left slider and the right slider are respectively provided with a first groove for avoiding the second guide rod, and the inner walls of the upper slider and the lower slider are respectively provided with a second groove for avoiding the first guide rod.

Furthermore, the driving mechanism comprises a rotating plate, the four sliding blocks are respectively provided with axial upright posts, and the rotating plate is provided with four strip-shaped holes for accommodating the upright posts; the switching of the winding needle between the circular shape and the elliptical shape is realized by rotating the rotating plate.

Furthermore, the needle winding device further comprises a fixed seat for driving the winding needle to rotate, a third through hole for penetrating the first guide rod and a fourth through hole for penetrating the second guide rod are formed in the fixed seat, and the rotating plate is arranged in the fixed seat.

Further, the needle winding device also comprises a self-locking mechanism for keeping the needle winding in a circular or oval state.

Furthermore, the self-locking mechanism comprises a locking rod and a spring, an arc-shaped hole is formed in the fixing seat, one end of the locking rod is fixed on the rotating plate, the other end of the locking rod penetrates through the arc-shaped hole to extend out of the fixing seat, one end of the spring is connected with the extending end of the locking rod, and the other end of the spring is connected to the fixing seat.

Furthermore, the point of the spring connected to the fixed seat is located on a perpendicular bisector of a connecting line of two ends of the arc-shaped hole, and the point is located on the inner side of the arc.

Furthermore, the self-locking mechanism also comprises a fixed column, a fixed hole is formed in the fixed seat, one end of the fixed column is inserted into the fixed hole, one end of the spring is connected with the extending end of the lock rod, and the other end of the spring is connected to the other end of the fixed column; the circle center of the fixed hole is located on a perpendicular bisector of a connecting line of two ends of the arc-shaped hole, and the circle is located on the inner side of the arc.

Compared with the prior art, the winding needle device of the winding machine provided by the invention has the advantages that the winding needle is formed by splicing a plurality of carriers, and the circular state is kept in the process of winding the pole piece. After the winding is finished, the carrier is driven by the driving mechanism to enable the winding needle to be changed into an oval shape from a round shape, and the shape required by the product is changed, so that the technological requirement is met. Because the winding process is in a circular state, the tension fluctuation in the winding process can be reduced, the winding speed is improved, the product quality can be improved, and the processing efficiency is greatly improved.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural diagram of a needle winding device provided in the prior art;

FIG. 2 is a schematic view of the present invention showing the needle in a circular configuration;

FIG. 3 is a schematic view of the winding needle of FIG. 2 in an elliptical shape;

FIG. 4 is a perspective view of the winding needle;

FIG. 5 is a schematic structural diagram of a needle winding device provided by the present invention;

FIG. 6 is an exploded view of the needle winding device of FIG. 5;

fig. 7 is a schematic structural view of the fixing base in fig. 6.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 and 3, the present invention provides a needle winding device of a winding machine, comprising a circular winding needle 10 formed by splicing a plurality of carriers and a driving mechanism 20 for driving the carriers to move, wherein the driving mechanism 20 is in transmission connection with the plurality of carriers and can drive the plurality of carriers to move to form an elliptical winding needle 10. Since the winding needle 10 is formed by splicing a plurality of carriers, a circular state is kept in the process of winding the pole piece. After the winding is finished, the carrier is driven by the mechanism to change the winding needle 10 from a round shape to an oval shape to a shape required by a product, so that the process requirement is met. Because the winding process is in a circular state, the tension fluctuation in the winding process can be reduced, the winding speed is improved, the product quality can be improved, and the processing efficiency is greatly improved.

In the present embodiment, there are four carriers, i.e., a left carrier 11 and a right carrier 12 disposed opposite to each other and an upper carrier 13 and a lower carrier 14 disposed opposite to each other. In an initial state, the four carriers are spliced into a circular winding needle 10; the driving mechanism can drive the left carrier 11 and the right carrier 12 to approach each other along the radial direction, and drive the upper carrier 13 and the lower carrier 14 to move away from each other along the radial direction, so that the four carriers form the elliptical winding needle 10. In other embodiments, the number of carriers can be six, eight, etc., but the larger the number, the more difficult the control, and the selection can be made according to actual needs. The above-described upper, lower, left, and right are upper, lower, left, and right facing fig. 2.

As shown in fig. 4, the driving mechanism 20 includes a left slider 21, a right slider 22, an upper slider 23 and a lower slider 24, the left carrier 11, the right carrier 12, the upper carrier 13 and the lower carrier 14 are respectively and detachably mounted at one end of the left slider 21, the right slider 22, the upper slider 23 and the lower slider 24, and different carriers can be mounted according to the specifications of the required battery cells by a detachable mounting manner, so as to adapt to the winding of the battery cells with different specifications. The ends of the left slider 11 and the right slider 12, which are far away from the carrier, are respectively provided with a first through hole 25, and the ends of the upper slider 13 and the lower slider 14, which are far away from the carrier, are respectively provided with a second through hole 26. The driving mechanism 20 further comprises a first guide rod 27 and a second guide rod 28, the first guide rod 27 is slidably inserted into the first through hole 25, and the second guide rod 28 is slidably inserted into the second through hole 26; the first guide bar 27 and the second guide bar 28 are perpendicular to each other. This enables the left slider 11 and the right slider 12 to slide relatively along the first guide bar 27, and simultaneously enables the upper slider 13 and the lower slider to slide relatively along the second guide bar 28, ensuring the accuracy of the movement.

In this embodiment, the inner walls of the left slider 11 and the right slider 12 are respectively opened with first grooves (not shown) for avoiding the second guide bar 28, and the inner walls of the upper slider 13 and the lower slider 14 are respectively opened with second grooves (not shown) for avoiding the first guide bar 27. Therefore, the guide rod and the sliding block can be prevented from interfering with each other in the moving process, and the whole structure is more compact.

As shown in fig. 5 and 6, the driving mechanism 20 includes a rotating plate 40, four sliders are respectively provided with axial columns 50, and the rotating plate 40 is provided with four strip-shaped holes 41 for accommodating the columns 50; the switching of the winding needle 10 between the circular shape and the elliptical shape is achieved by rotating the rotating plate 40. In particular, four bar-shaped holes 41 are uniformly arranged around the axis, each carrier being "T" shaped. When needle 10 is circular, pillar 50 abuts one end of bar hole 41. The rotating plate 40 is rotated to drive the bar-shaped hole 41 to rotate, and at this time, the inner wall of the bar-shaped hole 41 and the upright column 50 slide relatively to each other, so as to drive the sliding block to slide. When the pillar 50 slides to the other end of the bar hole 41, the needle 10 is switched to an elliptical shape. In order to reduce the friction between the upright 50 and the inner wall of the strip-shaped hole 41, a roller or a bearing can be arranged on the upright 50.

Further, the needle winding device further comprises a fixing seat 60 for driving the winding needle 10 to rotate, a third through hole 61 for penetrating the first guide rod 27 and a fourth through hole 62 for penetrating the second guide rod 28 are formed in the fixing seat 60, and the rotating plate 40 is arranged in the fixing seat 60. When the winding needle is used, the fixing seat 60 is connected with the power part, the power part drives the fixing seat 60 to rotate, and the fixing seat 60 drives the winding needle 10 to rotate through the first guide rod 27 and the second guide rod 28, so that the pole piece winding process is realized. In this embodiment, the needle winding device 10 further includes four cover plates 80 for limiting, the four cover plates 80 are respectively installed around the fixing base 60 and cover the third through hole 61 and the fourth through hole 62, the guide rod is prevented from falling off after the cover, and the limiting function is achieved.

Specifically, the winding needle 10 device further includes a self-locking mechanism 70 for keeping the winding needle 10 in a circular or elliptical state. In this embodiment, the self-locking mechanism 70 includes a locking rod 71 and a spring 72, the fixing base 60 is provided with an arc-shaped hole 63, one end of the locking rod 71 is fixed on the rotating plate 40, the other end of the locking rod 71 passes through the arc-shaped hole 63 and extends out of the fixing base 60, one end of the spring 72 is connected with the extending end of the locking rod 71, and the other end of the spring is connected to the fixing base 60. When in use, the locking rod 71 can be pushed by external force to drive the rotating plate 40 to rotate. When the locking rod 71 is positioned at one end of the arc-shaped hole 63, the winding needle 10 is circular; when the locking lever 71 is located at the other end of the arc-shaped hole 63, the needle 10 is oval-shaped.

As shown in fig. 7, since a section of the arc hole 63 is protruded between two ends thereof, the lock rod 71 is not easy to slide from one end of the arc hole 63 to the other end thereof under the pulling force of the spring 72, thereby realizing self-locking and ensuring that the needle is in a circular or elliptical state. When the external force is released, the winding needle 10 can keep an oval state, so that the blanking is convenient. The point where the spring 72 is connected to the fixed seat 60 is located on the perpendicular bisector of the line connecting the two ends of the arc-shaped hole 63, and the point is located on the inner side of the arc.

In this embodiment, the self-locking mechanism 70 further includes a fixing post 73, the fixing base 60 is provided with a fixing hole 64, one end of the fixing post 73 is inserted into the fixing hole 64, one end of the spring 72 is connected to the extending end of the locking rod 71, and the other end of the spring is connected to the other end of the fixing post 73; the circle center of the fixing hole 64 is located on a perpendicular bisector of a connecting line of two ends of the arc-shaped hole 63, and the circle is located on the inner side of the arc. Under the tensile force of the spring 72, the lock rod 71 is not easy to slide to the other end from one end of the arc-shaped hole 63, so that self-locking is realized, the winding needle is ensured to be in an oval state, and blanking is facilitated.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.

Claims

1. The winding needle device of the winding machine is characterized by comprising a circular winding needle formed by splicing a plurality of carriers and a driving mechanism for driving the carriers to move, wherein the driving mechanism is in transmission connection with the carriers and can drive the carriers to move to form an oval winding needle;

the number of the carriers is four, and the four carriers are respectively a left carrier and a right carrier which are oppositely arranged and an upper carrier and a lower carrier which are oppositely arranged; in an initial state, the four carriers are spliced into a circular winding needle; the driving mechanism can drive the left carrier and the right carrier to mutually approach along the radial direction and drive the upper carrier and the lower carrier to mutually separate along the radial direction, so that the four carriers form an elliptical winding needle;

the driving mechanism comprises a left sliding block, a right sliding block, an upper sliding block and a lower sliding block, and the left carrier, the right carrier, the upper carrier and the lower carrier are respectively detachably mounted at one end of the left sliding block, the right sliding block, the upper sliding block and the lower sliding block; the needle winding device comprises a left slider, a right slider, an upper slider, a lower slider, a needle winding device and a needle winding device, wherein one ends of the left slider and the right slider, which are far away from a carrier, are respectively provided with a first through hole, one ends of the upper slider and the lower slider, which are far away from the carrier, are respectively provided with a second through hole, the needle winding device also comprises a first guide rod and a second guide rod, the first guide rod is slidably arranged in the first through hole, and the second guide rod; the first guide rod and the second guide rod are perpendicular to each other.

2. The needle winding device according to claim 1, wherein the inner walls of the left slider and the right slider are respectively provided with a first groove for avoiding the second guide bar, and the inner walls of the upper slider and the lower slider are respectively provided with a second groove for avoiding the first guide bar.

3. The needle winding device according to claim 1 or 2, wherein the driving mechanism comprises a rotating plate, the four sliders are respectively provided with an axial upright post, and the rotating plate is provided with four strip-shaped holes for accommodating the upright posts; the switching of the winding needle between the circular shape and the elliptical shape is realized by rotating the rotating plate.

4. The needle winding device of claim 3, further comprising a fixing base for driving the winding needle to rotate, wherein the fixing base is provided with a third through hole for penetrating the first guide rod and a fourth through hole for penetrating the second guide rod, and the rotating plate is disposed in the fixing base.

5. The needle winding device of claim 4, further comprising a self-locking mechanism for maintaining the needle winding in a circular or elliptical shape.

6. The needle winding device according to claim 5, wherein the self-locking mechanism comprises a locking rod and a spring, an arc-shaped hole is formed in the fixed seat, one end of the locking rod is fixed on the rotating plate, the other end of the locking rod penetrates through the arc-shaped hole and extends out of the fixed seat, one end of the spring is connected with the extending end of the locking rod, and the other end of the spring is connected to the fixed seat.

7. The needle winding device according to claim 6, wherein the point where the spring is connected to the fixed seat is located on a perpendicular bisector of a line connecting both ends of the arc-shaped hole, and the point is located on the inner side of the arc.

8. The needle winding device according to claim 6, wherein the self-locking mechanism further comprises a fixed column, a fixed hole is formed in the fixed seat, one end of the fixed column is inserted into the fixed hole, one end of the spring is connected with the extending end of the lock rod, and the other end of the spring is connected to the other end of the fixed column; the circle center of the fixed hole is located on a perpendicular bisector of a connecting line of two ends of the arc-shaped hole, and the circle is located on the inner side of the arc.