Winding needle mechanism
By designing the flare structure and bearing in the needle roll mechanism, the concentricity between the needle roll and the needle tip is solved, the existing needle roll is prone to breaking, extending the service life, reducing the difficulty of processing, and improving production efficiency.
Patent Information
- Application Number
- CN202323514493.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-22
AI Technical Summary
The existing needle rolling mechanism is prone to breaking during processing and use, which leads to high processing difficulty and short service life. Especially, the needle rolling with small diameter is more difficult to process the pinhole slot, and the needle rolling and the thimble are prone to repeated collisions. damage.
Design a needle rolling mechanism, in which the needle tip is a hollow structure, and a flare mouth is provided near the telescopic end of the needle rolling. The flare trace of the needle rolling is adjusted through the flare mouth structure to ensure that the needle rolling and the needle tip are on the same center line, and avoid repeated impacts. A bearing is also provided between the needle nozzle and the fixing sleeve to increase flexibility, and a gap and a sleeve are provided between the needle reel to reduce friction.
It extends the service life of the needle, improves the concentricity between the needle and the needle tip, reduces the difficulty of processing and assembly, and improves the output of the needle.
Smart Images
Figure CN222146317U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of needle rolling, in particular to a needle rolling mechanism. Background Art
[0002] At present, there are two main manufacturing processes for power lithium batteries: winding and lamination. The corresponding battery structures are mainly cylindrical, square, and soft-pack. Cylindrical and square batteries are mainly produced by winding, while soft-pack batteries are mainly produced by lamination. Since the winding process can achieve high-speed production of batteries through the rotation speed, and the speed that can be increased by lamination technology is limited, the current domestic power lithium batteries mainly use the winding process.
[0003] In the winding process, the winding cell is formed by winding the separator and the pole piece through the winding needle structure of the winding device. The radial dimension of the winding needle structure is related to the alignment of the pole piece and the size of the cell, so the radial dimension of the winding needle structure directly affects the quality of the cell. Therefore, the specific structure of the winding needle is very important for the production of lithium battery cells.
[0004] The existing winding needles still have the following problems: a needle nozzle in the traditional winding needle mechanism is provided with an ejector pin extending out of the needle nozzle, and the head of the winding needle is used to repeatedly collide with the ejector pin. In order to ensure concentricity, the head of the winding needle has a deeper pinhole groove to match the ejector pin. The deeper the pinhole groove, the larger the matching area with the ejector pin, and the higher the concentricity of the winding needle and the ejector pin.
[0005] (1) For winding needles with small diameters, they are very likely to break when processing the pinhole groove. Therefore, the processing of the pinhole groove is more difficult and the output is correspondingly low. (2) Moreover, when the head of the winding needle and the ejector pin collide repeatedly, the winding needle is also prone to breakage, resulting in a shorter service life of the winding needle. Utility Model Content
[0006] The purpose of the utility model is to solve the above defects and provide a needle winding mechanism.
[0007] The purpose of the utility model is achieved in the following way: a needle winding mechanism includes a needle winding, a needle nozzle and a fixed seat, the needle nozzle is fixed inside the fixed seat, the needle winding is extended and retracted along the needle nozzle, the needle nozzle is a hollow structure, and the end of the needle nozzle close to the extension of the needle winding is set as a bell mouth.
[0008] In the above description, as a further solution, the diameter of the bell mouth close to the winding needle is larger than the diameter away from the winding needle. The end of the bell mouth with a larger diameter is used to adjust the trajectory of the winding needle. When the winding needle is telescopic, shaking will occur, so that the winding needle and the needle nozzle are not on the same center line. When manufacturing the bell mouth, it should be noted that the diameter generated by the shaking of the winding needle is smaller than the diameter of the end of the bell mouth close to the extension and contraction of the winding needle. After that, the inner wall of the bell mouth first contacts the shaking winding needle. As the winding needle goes deeper and deeper into the needle nozzle, the inner wall of the bell mouth guides the winding needle to slide into the center line of the needle nozzle, so that the winding needle and the needle nozzle are on the same center line, ensuring the concentricity of the two.
[0009] In the above description, as a further solution, a bearing is provided between the needle tip and the fixing sleeve, and the bearing sleeve is mounted on the surface of the needle tip.
[0010] In the above description, as a further solution, there are two bearings, which are respectively arranged at the two ends of the needle nozzle, and a limiting ring and a sealing cover are respectively provided at both ends of the fixed seat, and the two bearings are respectively arranged on the inner side of the limiting ring and the inner side of the sealing cover.
[0011] In the above description, as a further solution, the winding needle includes a left winding needle body and a right winding needle body, the left winding needle body and the right winding needle body are in contact with each other, and there is a gap between the left winding needle body and the right winding needle body. When the left winding needle body and the right winding needle body are subjected to extrusion pressure, the gap can be (expanded) to release the gap, thereby reducing the friction between the diaphragm and the winding core.
[0012] In the above description, as a further solution, one end of the left needle winding body and one end of the right needle winding body are each provided with a sleeve, an opening is provided on the sleeve, the left needle winding body and the right needle winding body are respectively fixed in the two sleeves, and the two sleeves are fixed by inserting the same pin into the opening.
[0013] In the above description, as a further solution, keyways are provided on the fixing seat and the needle nozzle.
[0014] The beneficial effects produced by the utility model are as follows: the needle winding mechanism is provided with a bell mouth at the end of the needle nozzle close to the extension and retraction of the winding needle. When the winding needle is extended and retracted, it directly passes into the interior of the needle nozzle along the bell mouth, thereby avoiding repeated collisions between the winding needle and the ejector pin, extending the service life of the winding needle, ensuring high concentricity between the winding needle and the needle nozzle, and reducing the difficulty of processing and assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of a needle winding mechanism of the utility model;
[0016] Figure 2 For this utility model Figure 1 A is a partial enlarged schematic diagram;
[0017] Figure 3 This is a cross-sectional view of a needle winding mechanism of the utility model;
[0018] Figure 4 For this utility model Figure 3 A partial enlarged schematic diagram of B in the middle;
[0019] In the figure: 1-fixed seat, 2-needle nozzle, 3-limiting ring, 4-cover, 5-bearing, 6-left needle body, 7-right needle body, 8-bell mouth, 9-opening, 10-sleeve, 11-gap. DETAILED DESCRIPTION
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0021] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meanings of "several" and "multiple" are two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.
[0022] See also Figure 1-3A specifically implemented needle winding mechanism includes a winding needle, a needle nozzle 2 and a fixed seat 1, the needle nozzle 2 is fixed inside the fixed seat 1, the winding needle is extended and retracted along the needle nozzle 2, and the winding needle is driven by a general electric or pneumatic power source to perform a telescopic movement along the needle nozzle 2. The needle nozzle 2 is a hollow structure, and the end of the needle nozzle 2 close to the extension of the winding needle is set as a bell mouth 8. When the winding needle is extending and retracting, when the center of the circle of the winding needle and the needle nozzle 2 is offset, the bell mouth 8 structure has a large tolerance for the center of the circle offset, so that the winding needle is convenient to directly pass through the inside of the needle nozzle 2 along the bell mouth 8, ensuring the high concentricity of the winding needle and the needle nozzle 2, avoiding the disadvantage of setting an ejector pin, and extending the service life of the winding needle. The winding needle does not need to be processed with a pinhole groove in order to match the ejector pin, thereby reducing the processing difficulty of the winding needle and improving the output of the winding needle.
[0023] Specifically, the diameter of the end of the bell mouth 8 close to the extension and retraction of the winding needle is larger than the diameter of the end of the bell mouth 8 away from the winding needle. The end of the bell mouth 8 with a larger diameter is used to adjust the trajectory of the winding needle. When the winding needle is retracting and retracting, shaking will occur, so that the winding needle and the needle nozzle 2 are not on the same center line. When manufacturing the bell mouth 8, it should be noted that the diameter generated by the shaking of the winding needle is smaller than the diameter of the end of the bell mouth 8 close to the extension and retraction of the winding needle. After that, the inner wall of the bell mouth 8 first contacts the shaking winding needle. As the winding needle goes deeper and deeper into the needle nozzle 2, the inner wall of the bell mouth 8 guides the winding needle to slide into the center line of the needle nozzle 2, so that the winding needle and the needle nozzle 2 are on the same center line, ensuring the concentricity of the two.
[0024] In this embodiment, a bearing 5 is provided between the needle nozzle 2 and the fixed sleeve, and the bearing 5 is sleeved on the surface of the needle nozzle 2. Specifically, two bearings 5 are provided, and the two bearings 5 allow the needle nozzle 2 to be more flexible when rotating. The two bearings 5 are respectively arranged at the two ends of the needle nozzle 2, and a limiting ring 3 and a sealing cover 4 are respectively provided at the two ends of the fixed seat 1, and the two bearings 5 are respectively arranged on the inner side surface of the limiting ring 3 and the inner side surface of the sealing cover 4, and the limiting ring 3 and the sealing cover 4 are both used to fix the bearing 5 on the needle nozzle 2.
[0025] In this embodiment, the winding needle includes a left winding needle body 6 and a right winding needle body 7. The left winding needle body 6 and the right winding needle body 7 are in contact with each other. There is a gap 11 between the left winding needle body 6 and the right winding needle body 7. When the left winding needle body 6 and the right winding needle body 7 are subjected to squeezing force, the gap 11 can be (expanded) and released to reduce the friction between the diaphragm and the winding core.
[0026] Specifically, a sleeve 10 is provided at one end of the left needle winding body 6 and one end of the right needle winding body 7, and an opening 9 is provided on the sleeve 10. The left needle winding body 6 and the right needle winding body 7 are respectively fixed in the two sleeves 10, and the two sleeves 10 are fixed by inserting the same pin into the opening 9.
[0027] In this embodiment, key slots are provided on the fixing seat 1 and the needle nozzle 2, and the key slots are used to connect other devices to ensure the stability of the fixing seat 1 and the needle nozzle 2, so that the winding needle can be better extended and retracted in the bell mouth 8.
[0028] The working principle of the embodiment of the utility model is as follows: firstly, the fixing seat 1 and the needle nozzle 2 are fixed in position by the key slot, and then the power source is started to move the winding needle along the bell mouth 8 to the inside of the needle nozzle 2 for telescopic movement.
[0029] The above contents are further detailed descriptions of the present invention in combination with specific further embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as the protection scope of the present invention.
Claims
1. A needle winding mechanism, comprising a needle winding mechanism, a needle nozzle and a fixed seat, wherein the needle nozzle is fixed inside the fixed seat, and the needle winding mechanism is extended and retracted along the needle nozzle, characterized in that: The needle nozzle is a hollow structure, and the end of the needle nozzle close to the telescopic winding needle is set as a bell mouth; the diameter of the end of the bell mouth close to the telescopic winding needle is larger than the diameter of the end of the bell mouth away from the winding needle; a bearing is provided between the needle nozzle and the fixed sleeve, and the bearing sleeve is mounted on the surface of the needle nozzle; there are two bearings, which are respectively arranged at the two ends of the needle nozzle, and the two ends of the fixed seat are respectively provided with a limit ring and a cover, and the two bearings are respectively arranged on the inner side surface of the limit ring and the inner side surface of the cover; the winding needle includes a left winding needle body and a right winding needle body, the left winding needle body and the right winding needle body are in contact with each other, and there is a gap between the left winding needle body and the right winding needle body; one end of the left winding needle body and one end of the right winding needle body are both provided with a sleeve, and an opening is provided on the sleeve; the fixed seat and the needle nozzle are both provided with a keyway.