Staggered winding needle structure capable of adjusting wrong needle amount

Abstract

The utility model relates to a misplaced winding needle structure capable of adjusting misplaced needle quantity, which comprises an upper fixed seat, a lower fixed seat, an outer movable needle mounting block, an inner movable needle mounting block, an outer movable needle, an inner movable needle, an outer fixed needle, an inner fixed needle and a winding needle spring, the side of the upper fixed seat and the side of the lower fixed seat are respectively provided with an adjusting groove, and misplaced needle adjusting inserts can be inserted into or moved out of the adjusting grooves. Compared with the prior art, the adjusting groove and the wrong needle adjusting inserting piece are additionally arranged, the wrong needle adjusting inserting piece can be inserted into or moved out of the adjusting groove, when the wrong needle adjusting inserting piece is moved out of the adjusting groove, the movable displacement of the outer movable needle installation block and the inner movable needle installation block is large, so that the wrong needle amount is large, and the inner needle clamping gap is large; the movable displacement of the outer movable needle mounting block and the inner movable needle mounting block is small, so that the needle staggering amount is small, the gap of the inner clamping needle is small, the needle staggering amount can be adjusted only by adjusting the needle staggering adjusting insertion piece, the structural design is ingenious, the whole winding needle does not need to be replaced, the application range is expanded, and the actual production requirement is met.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion battery manufacturing equipment, in particular to a staggered needle winding structure with adjustable needle stagger amount. Background Art

[0002] The sheet-making and winding machine, whose full name is lithium-ion battery sheet-making and winding machine, is a mechanical equipment used to manufacture lithium-ion batteries. Lithium-ion batteries are composed of positive and negative electrode sheets, diaphragms, and tabs. Since lithium-ion batteries are divided into square and cylindrical shapes, sheet-making and winding machines can also be classified into square sheet-making and winding machines and cylindrical sheet-making and winding machines. Among the many components of the sheet-making and winding machine, the winding needle is one of the most important components. The quality of the winding needle structure directly affects the winding and forming of the battery cell. The winding needle has two functions. First, at the winding station, the winding needle is responsible for inserting the diaphragm, clamping the diaphragm firmly, and then winding the left and right electrode sheets together to form a bare battery cell. Second, at the needle extraction and unloading station, the winding needle must be opened in time to extract the needle. The conventional winding needle structure is simple in design, and the winding needle closure is often unstable, resulting in the risk of scratching the diaphragm when the winding needle is removed or poor needle extraction after the battery cell is rolled.

[0003] In view of the defects of the conventional winding needle structure, the applicant submitted an invention patent application with application number 202010398763.1 to the State Intellectual Property Office on May 12, 2020, entitled "A staggered winding needle structure of a square lithium battery film winding machine and a cell winding method thereof". The winding needle structure is mainly as follows: Figure 1 As shown, the characteristics of the needle winding are reasonable structural design, stable needle movement, convenient diaphragm penetration, stable diaphragm clamping, and convenient needle withdrawal.

[0004] However, the applicant found in actual use that for lithium-ion battery cell products of different specifications, the thickness of the pole piece, diaphragm, etc. and the clamping amount of the battery cell are different. If the film winding machine changes the battery cell model produced, the winding needle needs to be replaced with another structure winding needle with a different opening displacement. Replacing the winding needle is time-consuming and labor-intensive, and it also needs to be re-calibrated to ensure accuracy. Therefore, the applicant believes that it is necessary to further improve the technical solution previously applied for, so that it has the function of adjustable needle error displacement to apply to batteries of different specifications. Utility Model Content

[0005] In view of the above-mentioned defects in the prior art, the utility model provides a staggered needle winding structure with adjustable staggered needle amount, and the specific technical solution is as follows:

[0006] A staggered needle winding structure with adjustable staggered needle amount comprises an upper fixed seat, a lower fixed seat, an outer moving needle mounting block, an inner moving needle mounting block, an outer moving needle, an inner moving needle, an outer fixed needle, an inner fixed needle and a needle winding spring. The upper fixed seat and the lower fixed seat are fixedly connected as one body. The outer moving needle mounting block and the inner moving needle mounting block are mounted in the inner cavities of the upper fixed seat and the lower fixed seat. The outer moving needle mounting block and the inner moving needle mounting block are staggered. The outer moving needle is fixedly mounted on the front end of the outer moving needle mounting block. The inner moving needle is fixedly mounted on the front end of the inner moving needle mounting block. The outer moving needle covers the inner moving needle. The outer fixed needle is fixedly mounted on the front end of the lower fixed seat. An inner fixed needle is installed, and a first protrusion is provided on the outer side of the inner moving needle mounting block. A needle winding spring is installed between the inner moving needle mounting block and the lower fixed seat, and the needle winding spring drives the first protrusion to extend from the upper fixed seat. A second protrusion is provided under the outer moving needle mounting block, and a needle winding spring is installed between the outer moving needle mounting block and the upper fixed seat, and the needle winding spring drives the second protrusion to extend from the lower fixed seat. Adjustment grooves are respectively provided on the sides of the upper fixed seat and the lower fixed seat, and the staggered needle adjustment plug can be inserted into or moved out of the adjustment groove. When the staggered needle adjustment plug is inserted into the adjustment groove, the moving position of the outer moving needle mounting block and the inner moving needle mounting block is limited.

[0007] As a preferred solution of the utility model, the upper staggered needle adjustment insert is inserted between the outer movable needle mounting block and the upper spring plate, and the lower staggered needle adjustment insert is inserted between the inner movable needle mounting block and the lower spring plate.

[0008] As a preferred solution of the utility model, the staggered needle adjustment insert is U-shaped.

[0009] As a preferred solution of the utility model, vertically arranged guide pillars are slidably installed inside the outer moving needle mounting block and the inner moving needle mounting block respectively.

[0010] As a preferred solution of the utility model, a washer is installed at the end of the guide column, the washer is close to one side of the staggered needle adjustment insert, and the height of the washer is lower than the height of the staggered needle adjustment insert.

[0011] Beneficial effect: Compared with the prior art, the utility model adds an adjustment slot and a staggered needle adjustment insert. The staggered needle adjustment insert can be inserted into or moved out of the adjustment slot. When the staggered needle adjustment insert is moved out of the adjustment slot, the movable displacement of the outer moving needle mounting block and the inner moving needle mounting block roughly makes the staggered needle amount large and the gap between the inner clamping needles large. When the staggered needle adjustment insert is inserted into the adjustment slot, the movable displacement of the outer moving needle mounting block and the inner moving needle mounting block is small, resulting in a small staggered needle amount and a small gap between the inner clamping needles. The staggered needle amount can be adjusted by simply adjusting the staggered needle adjustment insert. The ingenious structural design does not require the replacement of the entire winding needle, thereby expanding the scope of application and meeting actual production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the prior art;

[0013] Figure 2 It is a structural diagram of the utility model;

[0014] Figure 3 It is a three-dimensional diagram of the matching of the staggered needle adjustment insert and the fixing seat of the utility model;

[0015] Figure 4 This is a needle winding structure diagram when the staggered needle adjustment insert of the utility model is moved out of the adjustment slot;

[0016] Figure 5 It is a needle winding structure diagram when the staggered needle adjustment insert of the utility model is inserted into the adjustment groove. DETAILED DESCRIPTION

[0017] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings:

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operated in specific directions. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] like Figures 2 to 5As shown, a staggered needle winding structure with adjustable needle misalignment comprises an upper fixed seat 1, a lower fixed seat 2, an outer moving needle mounting block 3, an inner moving needle mounting block 4, an outer moving needle 5, an inner moving needle 6, an outer fixed needle 7, an inner fixed needle 8 and a winding needle spring 9. The upper fixed seat 1 and the lower fixed seat 2 are fixedly connected as one body and fixedly connected to the rotating shaft of the winding machine. When the rotating shaft rotates, the upper fixed seat 1 and the lower fixed seat 2 are synchronously rotated to wind the battery cell. The outer moving needle mounting block 3 and the inner moving needle mounting block 4 are installed in the inner cavity of the upper fixed seat 1 and the lower fixed seat 2. The outer moving needle mounting block 3 and the inner moving needle mounting block 4 are staggered to avoid collision when the outer moving needle mounting block 3 and the inner moving needle mounting block 4 move. The outer moving needle 5 is fixedly installed at the front end of the outer moving needle mounting block 3, and the inner moving needle 6 is fixedly installed at the front end of the inner moving needle mounting block 4. The outer moving needle 5 covers the inner moving needle 6. The lower fixed seat 2 An outer fixing needle 5 is fixedly installed at the front end, and an inner fixing needle 6 is fixedly installed inside the outer fixing needle 5. A first protrusion is provided on the outer side of the inner moving needle mounting block 4, a needle winding spring 9 is installed between the inner moving needle mounting block 4 and the lower fixed seat 2, a spring plate is installed in the lower fixed seat 2, and one end of the needle winding spring 9 at the inner moving needle mounting block 4 pushes against the spring plate and the other end is inserted into the inner moving needle mounting block 4, so the needle winding spring 9 at the inner moving needle mounting block 4 drives the first protrusion to extend from the upper fixed seat 1, and a second protrusion is provided on the outer side of the outer moving needle mounting block 3, a needle winding spring 9 is installed between the outer moving needle mounting block 3 and the upper fixed seat 1, a spring plate 10 is installed in the upper fixed seat 1, and one end of the needle winding spring 9 at the outer moving needle mounting block 3 pushes against the spring plate and the other end is inserted into the outer moving needle mounting block 3, so the needle winding spring 9 at the outer moving needle mounting block 3 drives the second protrusion 31 to extend from the lower fixed seat 2.

[0021] The sides of the upper fixed seat 1 and the lower fixed seat 2 are respectively provided with adjustment grooves 11, that is, the side of the upper fixed seat 1 is provided with an adjustment groove 11, and the side of the lower fixed seat 2 is also provided with an adjustment groove 11. The staggered needle adjustment plug 12 can be inserted into or removed from the adjustment groove 11. There are two staggered needle adjustment plugs 12. When the staggered needle adjustment plug 12 is inserted into the adjustment groove 11, the moving position of the outer moving needle mounting block 3 and the inner moving needle mounting block 4 is limited.

[0022] Specifically, the upper staggered needle adjustment insert 12 is inserted between the outer movable needle mounting block 3 and the upper spring plate 10 , and the lower staggered needle adjustment insert 12 is inserted between the inner movable needle mounting block 4 and the lower spring plate 10 .

[0023] like Figure 4 As shown, when the misaligned needle adjustment insert 12 moves out of the adjustment slot 11, the movable displacement of the outer moving needle mounting block 3 and the inner moving needle mounting block 4 roughly makes the misaligned needle amount large and the gap of the inner clamping needle large. In the needle returning state, the outer moving needle mounting block 3 and the inner moving needle mounting block 4 will not be limited by their respective corresponding misaligned needle adjustment inserts 12, so the return stroke is long and the misaligned needle amount is large.

[0024] like Figure 5As shown, when the misaligned needle adjustment plug 12 is inserted into the adjustment slot 11, the movable displacement of the outer moving needle mounting block 3 and the inner moving needle mounting block 4 is small, resulting in a small misaligned needle amount and a small gap between the inner clamping needles. In the needle returning state, the outer moving needle mounting block 3 and the inner moving needle mounting block 4 are respectively limited and blocked by their corresponding misaligned needle adjustment plugs 12, so the return stroke is short and the misaligned needle amount is small.

[0025] Specifically, the staggered needle adjustment insert 12 is in a U-shape.

[0026] As another embodiment, on the basis of the above structure, vertically arranged guide columns 13 are slidably installed inside the outer movable needle mounting block 3 and the inner movable needle mounting block 4 respectively. The function of the guide column 13 is to guide the movement of the mounting block. A washer 14 is installed at the end of the guide column 13. The washer 14 is close to one side of the misaligned needle adjustment plug. The height of the washer 14 is lower than the height of the misaligned needle adjustment plug 12. The function of the washer 14 is to buffer the impact of the movement of the mounting block after the misaligned needle adjustment plug 12 moves out of the adjustment groove 11 and to limit the position.

[0027] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A dislocation needle winding structure with adjustable dislocation needle amount, comprising an upper fixed seat, a lower fixed seat, an outer moving needle mounting block, an inner moving needle mounting block, an outer moving needle, an inner moving needle, an outer fixed needle, an inner fixed needle and a needle winding spring, the upper fixed seat and the lower fixed seat are fixedly connected as one, the outer moving needle mounting block and the inner moving needle mounting block are mounted in the inner cavities of the upper fixed seat and the lower fixed seat, the outer moving needle mounting block and the inner moving needle mounting block are dislocated, the outer moving needle is fixedly mounted at the front end of the outer moving needle mounting block, the inner moving needle is fixedly mounted at the front end of the inner moving needle mounting block, the outer moving needle covers the inner moving needle, the outer fixed needle is fixedly mounted at the front end of the lower fixed seat, the inner fixed needle is fixedly mounted in the outer fixed needle, a first protrusion is provided on the outer side of the inner moving needle mounting block, a needle winding spring is installed between the inner moving needle mounting block and the lower fixed seat, the needle winding spring drives the first protrusion to extend from the upper fixed seat, a second protrusion is provided below the outer moving needle mounting block, a needle winding spring is installed between the outer moving needle mounting block and the upper fixed seat, the needle winding spring drives the second protrusion to extend from the lower fixed seat, characterized in that: The sides of the upper fixing seat and the lower fixing seat are respectively provided with adjustment grooves, and the staggered needle adjustment plug can be inserted into or moved out of the adjustment grooves. When the staggered needle adjustment plug is inserted into the adjustment grooves, the moving positions of the outer moving needle mounting block and the inner moving needle mounting block are limited.

2. The staggered needle winding structure with adjustable stagger amount according to claim 1, characterized in that: The upper staggered needle adjustment insert is inserted between the outer movable needle mounting block and the upper spring plate, and the lower staggered needle adjustment insert is inserted between the inner movable needle mounting block and the lower spring plate.

3. The staggered needle winding structure with adjustable stagger amount according to claim 1 or 2, characterized in that: The misalignment adjustment insert is U-shaped.

4. The staggered needle winding structure with adjustable stagger amount according to claim 1, characterized in that: A vertically arranged guide column is slidably installed inside the outer moving needle mounting block and the inner moving needle mounting block respectively.

5. The staggered needle winding structure with adjustable stagger amount according to claim 1, characterized in that: A washer is installed at the end of the guide column, the washer is close to one side of the misaligned needle adjustment plug, and the height of the washer is lower than the height of the misaligned needle adjustment plug.

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