Cylindrical battery cell winding needle mechanism

Abstract

The utility model discloses a cylindrical battery cell winding needle mechanism, and relates to the technical field of battery manufacturing. The machine head comprises a machine head frame, a winding needle assembly and a winding needle telescopic assembly, the winding needle assembly comprises a mounting disc, winding needle shaft sleeves, short winding needles and long winding needles, the mounting disc is rotationally connected to the machine head frame, a mounting base is arranged on the mounting disc, the rear ends of the winding needle shaft sleeves are rotationally connected with the mounting disc, rear gears are arranged at the front ends of the winding needle shaft sleeves, rear needle nozzles are arranged on the rear gears, a plurality of front gears are rotationally connected to the mounting base, and front needle nozzles are arranged on the front gears. The rear ends of the short winding needle and the long winding needle are inserted into the winding needle shaft sleeve and are connected with the winding needle telescopic assembly; the winding needle telescopic assembly comprises a core-pulling sleeve and a mandrel, the core-pulling sleeve is coaxially and movably inserted into the winding needle shaft sleeve, the front end of the core-pulling sleeve is fixedly connected with the short winding needle, the rear end of the core-pulling sleeve is provided with a first shifting piece, the mandrel is coaxially and movably inserted into the core-pulling sleeve, the front end of the mandrel is fixedly connected with the long winding needle, and the rear end of the mandrel is provided with a second shifting piece. The device is simple in structure, low in manufacturing cost and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field, especially relate to a cylindrical lithium battery electric core winding needle mechanism. BACKGROUND

[0002] In the manufacturing process of cylindrical lithium battery electric core, winding process is needed, that is, the positive and negative electrode sheets and the diaphragm are combined together to form the electric core by winding, and the winding process usually needs to use specific winding equipment to wind the positive and negative electrode sheets and the diaphragm into a compact cylindrical structure according to a certain order.

[0003] For example, Chinese patent document CN210052806U discloses a winding device for winding anti-deformation electric core, which comprises a winding needle seat, a winding shaft sleeve is arranged on the winding needle seat, the axial ends of the winding shaft sleeve respectively penetrate the winding needle seat and the rotating disc and extend out, the end of the winding shaft sleeve penetrating the winding needle seat is connected with the diaphragm winding needle assembly, and the winding shaft sleeve is further sleeved with an insertion and extraction shaft assembly which can move along the axial direction of the winding shaft sleeve and is movably connected with the diaphragm winding needle assembly. However, the insertion and extraction shaft assembly of the winding device adopts a thimble type matching structure, during winding work, the first shaft tail sleeve ring is actuated to make the thimble half shaft drive the thimble to abut against the diaphragm winding needle assembly and make the movable thimble of the diaphragm winding needle assembly move away from the inner thimble to open and close to clamp the diaphragm, when the thimble is inserted, the upper thimble sliding block and the inner thimble sliding block are driven by the cam follower to move along the radial direction towards the two sides of the installation groove, and the movable thimble and the inner thimble are driven to open and the inner thimble is clamped relative to the fixed thimble, thereby clamping the diaphragm to perform the next winding work. The structure of the insertion and extraction shaft assembly for clamping the diaphragm of the diaphragm winding needle assembly is relatively complex, the manufacturing cost is high, and the subsequent maintenance is not convenient. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a cylindrical electric core winding needle mechanism which is simple in structure, low in manufacturing cost and convenient to maintain.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The application discloses a cylindrical battery cell winding needle mechanism which comprises a machine head frame, a winding needle assembly and a winding needle telescopic assembly.

[0007] In some embodiments, the rear end of the core pulling sleeve penetrates through the winding needle sleeve, and the rear end of the mandrel penetrates through the core pulling sleeve; the first driving member is a cylinder body fixedly sleeved at the rear end of the core pulling sleeve, and the outer wall of the first driving member is provided with a driving convex ring in the circumferential direction; the second driving member comprises a needle cover and a needle disc, the needle cover is fixedly sleeved at the rear end of the mandrel, and the needle disc is rotatably sleeved on the needle cover through a bearing, and the outer wall of the needle disc is also provided with a driving convex ring in the circumferential direction.

[0008] In at least one embodiment, the first driving member is threadedly connected with the core pulling sleeve; the first driving member is respectively provided with a stop ring and a locking nut at the front end and the rear end, the stop ring is fixedly sleeved at the rear end of the winding needle sleeve, and the locking nut is threadedly connected at the rear end of the core pulling sleeve.

[0009] In at least one embodiment, the needle cover is fixedly connected with the mandrel through a screw.

[0010] Compared with the prior art, the cylindrical battery cell winding needle mechanism has at least the following beneficial effects:

[0011] The utility model discloses a first knob member can make the short needle activity with the core cover driving, when the short needle is inserted into the front needle nozzle after the short needle is stretched out from the rear needle nozzle, the second knob member can make the mandril activity along the core cover length direction with the knob, when the long needle is inserted into the front needle nozzle after the long needle is stretched out from the rear needle nozzle, the long needle and short needle are folded and form the cylinder, can the battery separator is clamped in the middle, realizes the clamping of battery separator to carry out the next step winding work, after winding work is completed, first knob member is driven and the mandril is drawn along the core cover length, can the long needle is drawn from the battery, then knob member is driven again and the core cover is drawn along the needle shaft sleeve length, can the short needle is drawn from the battery, the utility model discloses the needle telescopic subassembly adopts the core type structure, compared with the needle type structure of plug draw shaft subassembly in prior art, the structure is simpler, thereby reduces the manufacturing cost, and the maintenance is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] One or more embodiments of the utility model will now be described, by way of example only, with reference to the accompanying drawings:

[0013] Fig. 1 It is the structural schematic diagram of the utility model embodiment;

[0014] Fig. 2 It is the structural schematic diagram of the needle assembly and needle telescopic subassembly of the utility model embodiment;

[0015] Fig. 3 It is the sectional view of the needle assembly and needle telescopic subassembly of the utility model embodiment;

[0016] Fig. 4 It is the exploded structural schematic diagram of the needle assembly and needle telescopic subassembly of the utility model embodiment;

[0017] Fig. 5 It is the structural schematic diagram of the transmission shaft and intermediate transmission gear of the utility model embodiment;

[0018] Fig. 6 It is the structural schematic diagram of the machine head frame and mounting seat of the utility model embodiment.

[0019] The figure mark is: 1, machine head frame;2, needle assembly;21, mounting disc;211, over -and -back gear;212, connecting cylinder;22, needle shaft sleeve;221, baffle ring;23, short needle;24, long needle;3, needle telescopic subassembly;31, core cover;311, lock nut;32, mandril;4, mounting seat;41, triangular head;411, bearing seat;5, rear gear;6, rear needle nozzle;7, front gear;8, front needle nozzle;9, first knob member;10, second knob member;101, needle cover;102, needle disc;20, knob convex ring;30, transmission shaft;301, intermediate transmission gear. DETAILED DESCRIPTION

[0020] The utility model will be described in detail below with reference to the exemplary embodiments in the drawings. It should be understood that the present application can be realized in various forms, and should not be understood as being limited to the embodiments described herein. The embodiments are provided to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several", "a plurality of" is two or more, unless otherwise explicitly specified and limited. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature of the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature of the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature of the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0022] As shown in Figs. 1-6 A cylindrical battery winding needle mechanism, comprising a machine head frame 1, a winding needle assembly 2 and a winding needle telescopic assembly 3.

[0023] The winding needle assembly 2 comprises a mounting disc 21, a plurality of winding needle sleeves 22, a plurality of short winding needles 23 and a plurality of long winding needles 24, the mounting disc 21 is rotationally connected to the machine head frame 1, the front end of the mounting disc 21 is provided with the mounting seat 4, the rear end of each of the plurality of winding needle sleeves 22 penetrates through the mounting disc 21 and is rotationally connected with the mounting disc 21, the front end of each of the plurality of winding needle sleeves 22 is fixedly provided with a rear gear 5, the rear gear 5 is fixedly provided with a rear needle nozzle 6, a plurality of front gears 7 coaxial with the rear gears 5 are rotationally connected to the mounting seat 4, the front gears 7 are fixedly provided with front needle nozzles 8 opposite to the rear needle nozzle 6, the short winding needles 23 and the long winding needles 24 are semicircular in cross section, the short winding needles 23 and the long winding needles 24 are folded to form a cylinder, and the rear end of each of the short winding needles 23 and the long winding needles 24 is inserted into the winding needle sleeve 22 and connected with the winding needle telescopic assembly 3, and the front end of each of the short winding needles 23 and the long winding needles 24 can be extended from the rear needle nozzle 6 and inserted into the front needle nozzle 8; the winding needle telescopic assembly 3 comprises a core pulling sleeve 31 and a core shaft 32, the core pulling sleeve 31 is coaxially movably inserted into the winding needle sleeve 22, the front end of the core pulling sleeve 31 is fixedly connected with the short winding needle 23, and the rear end of the core pulling sleeve 31 is provided with a first driving member 9; the core shaft 32 is coaxially movably inserted into the core pulling sleeve 31, the front end of the core shaft 32 is fixedly connected with the long winding needle 24, and the rear end of the core shaft 32 is provided with a second driving member 10.

[0024] In the process of winding the battery cell, the first driving member 9 is driven to drive the core pulling sleeve 31 to move, when the short winding needle 23 is extended from the rear needle nozzle 6 and inserted into the front needle nozzle 8, the second driving member 10 is driven to drive the core shaft 32 to move along the length direction of the core pulling sleeve 31, the core shaft 32 drives the long winding needle 24 to move, when the long winding needle 24 is extended from the rear needle nozzle 6 and inserted into the front needle nozzle 8, the long winding needle 24 and the short winding needle 23 are folded to form a cylinder, so that the battery cell diaphragm is clamped in the middle, and the next winding work can be carried out; after the winding work is completed, the core shaft 32 is first pulled out along the length direction of the core pulling sleeve 31 by driving the second driving member 10, so that the long winding needle 24 is pulled out of the battery cell, then the core pulling sleeve 31 is pulled out along the length direction of the winding needle sleeve 22 by driving the first driving member 9, so that the short winding needle 23 is pulled out of the battery cell. Compared with the existing technology of the ejector pin type insertion and extraction structure, the winding needle telescopic assembly 3 has a simpler structure, reduces the manufacturing cost and is convenient for subsequent maintenance.

[0025] Specifically, the rear end of the core pulling sleeve 31 penetrates through the winding needle sleeve 22, and the rear end of the core shaft 32 penetrates through the core pulling sleeve 31; the first driving member 9 is a cylinder fixedly sleeved at the rear end of the core pulling sleeve 31, and the outer wall of the first driving member 9 is provided with a driving convex ring 20 in the circumferential direction; the second driving member 10 comprises a needle cover 101 and a needle disc 102, the needle cover 101 is fixedly sleeved at the rear end of the core shaft 32, and the needle disc 102 is rotationally sleeved on the needle cover 101 through a bearing, and the outer wall of the needle disc 102 is also provided with a driving convex ring 20 in the circumferential direction.

[0026] Optionally, the first knob 9 is threadedly connected with the core pulling sleeve 31; the first knob 9 is provided with a check ring 221 and a locking nut 311 at the front and rear ends respectively, the check ring 221 is fixedly sleeved at the rear end of the needle winding shaft sleeve 22, and the locking nut 311 is threadedly connected at the rear end of the core pulling sleeve 31. The locking nut 311 can be arranged to lock the first knob 9, and the check ring 221 can be arranged to limit the front position of the first knob 9.

[0027] Optionally, the needle knob cover 101 is fixedly connected with the mandrel 32 through a screw.

[0028] In some embodiments of the utility model, each needle winding shaft sleeve 22 is connected with a first driving assembly (not shown in the drawings), and the first driving assembly is used for driving the needle winding shaft sleeve 22 to rotate around the axis on the mounting disc 21. Further, the mounting seat 4 is rotationally connected with a transmission shaft 30, the axis of the transmission shaft 30 is parallel with the front gear 7 and the rear gear 5, and the both ends of the transmission shaft 30 are coaxially connected with intermediate transmission gears 301, and the intermediate transmission gears 301 at both ends are engaged with the front gear 7 and the rear gear 5 respectively. When the first driving assembly drives the needle winding shaft sleeve 22 to rotate, the rear gear 5 rotates and drives the transmission shaft 30 to rotate through the intermediate transmission gears 301 engaged with the rear gear 5, and the transmission shaft 30 rotates and drives the rear gear 5 to rotate through the intermediate transmission gears 301 engaged with the transmission shaft 30, so when the short needle 23 and the long needle 24 are extended from the rear needle nozzle 6 and inserted into the front needle nozzle 8, the first driving assembly can drive the rear needle nozzle 6, the rear gear 5, the front needle nozzle 8 and the front gear 7 to rotate synchronously, so as to drive the short needle 23 and the long needle 24 to rotate around the axis and carry out the winding work of the battery cell.

[0029] As preferred, the needle winding shaft sleeve 22 is provided with three, and the three needle winding shaft sleeves 22 are distributed in a triangular shape with the center of the mounting disc 21 as the center; the mounting seat 4 is provided with a triangular head 41 at the front end, and the triangular head 41 is provided with a bearing seat 411; and the front gear 7 is coaxially connected with the bearing in the bearing seat 411.

[0030] In some embodiments of the utility model, the mounting disc 21 is coaxially fixed with a turnover gear 211, the turnover gear 211 is connected with a second driving assembly (not shown in the drawings), and the second driving assembly is used for driving the turnover gear 211 to rotate, so as to drive the mounting disc 21 to rotate on the machine head frame 1. After the winding work of the battery cell is completed, the work station is turned over by rotating the mounting disc 21, that is, the mounting disc 21 drives the needle winding shaft sleeve 22, the short needle 23 and the long needle 24 to rotate around the axis of the machine head frame 1, so as to rotate the needle winding shaft sleeve 22, the short needle 23 and the long needle 24 on the same work station to the transfer work station or the blanking work station.

[0031] Further, the mounting disc 21 is provided with a connecting cylinder 212 matched with the winding needle shaft sleeve 22, the connecting cylinder 212 is vertically arranged on the mounting disc 21 and is fixedly connected with the mounting disc 21, the winding needle shaft sleeve 22 is arranged on the connecting cylinder 212 and is rotatably connected with the connecting cylinder 212 through a bearing.

[0032] The working principle of the utility model is as follows: the short winding needle 23 is mounted on the core pulling sleeve 31, the long winding needle 24 is mounted on the mandrel 32, when the mounting disc 21 is ready to be turned over to switch the working position, the core pulling sleeve 31 is extended, the short winding needle 23 is inserted into the front needle nozzle 8, after the mounting disc 21 is turned over to the position, the short winding needle 23 is pressed on the diaphragm of the battery cell, then the mandrel 32 is extended, the long winding needle 24 is inserted into the front needle nozzle 8, the long winding needle 24 and the short winding needle 23 are folded to form a cylinder, so that the diaphragm is clamped in the middle, the long winding needle 24 and the short winding needle 23 are rotated under the driving of the winding needle shaft sleeve 22, the winding work of the battery cell is carried out through the winding of the long winding needle 24 and the short winding needle 23; when the winding of the battery cell is completed, the mounting disc 21 is turned over to the position of pasting the end adhesive, after the end adhesive is pasted, the mounting disc 21 is turned over to the unloading position, the material taking clamp on the winding machine is extended to clamp the battery cell, then the mandrel 32 is retracted, the long winding needle 24 is pulled out from the battery cell, then the core pulling sleeve 31 is retracted, the short winding needle 23 is pulled out from the battery cell, and the work cycle is completed.

[0033] It should be understood that all the above embodiments are exemplary but not restrictive, any modification, equivalent change and modification made by the person skilled in the art to the above described specific embodiments still belong to the range of the technical scheme of the utility model.

Claims

1. A cylindrical cell winder mechanism, characterized by: The machine head frame, the winding needle assembly and the winding needle telescopic assembly are included. The winding needle assembly comprises a mounting disc, a plurality of winding needle sleeves, a plurality of short winding needles and a plurality of long winding needles. The mounting disc is rotationally connected to the machine head frame. The front end of the mounting disc is provided with a mounting seat. The rear ends of the plurality of winding needle sleeves are all penetrated through the mounting disc and rotationally connected to the mounting disc. The front ends of the plurality of winding needle sleeves are all fixed with rear gears. The rear gears are fixed with rear needle nozzles. The mounting seat is rotationally connected with a plurality of front gears coaxial with the rear gears. The front gears are fixed with front needle nozzles opposite to the rear needle nozzles. The cross sections of the short winding needles and the long winding needles are semicircular. The short winding needles and the long winding needles are folded to form a cylinder. The rear ends of the short winding needles and the long winding needles are all inserted into the winding needle sleeves and connected to the winding needle telescopic assembly. The front ends of the short winding needles and the long winding needles are all extended from the rear needle nozzles and inserted into the front needle nozzles. The winding needle telescopic assembly comprises a core pulling sleeve and a core shaft. The core pulling sleeve is coaxially and movably inserted into the winding needle sleeve. The front end of the core pulling sleeve is fixedly connected to the short winding needle. The rear end of the core pulling sleeve is provided with a first shifting member. The core shaft is coaxially and movably inserted into the core pulling sleeve. The front end of the core shaft is fixedly connected to the long winding needle. The rear end of the core shaft is provided with a second shifting member.

2. The cylindrical cell wicking needle mechanism of claim 1, wherein: The rear end of the core pulling sleeve is penetrated through the winding needle sleeve. The rear end of the core shaft is penetrated through the core pulling sleeve. The first shifting member is a cylinder fixedly sleeved on the rear end of the core pulling sleeve. The outer wall of the first shifting member is circumferentially provided with a shifting convex ring. The second shifting member comprises a needle shifting cover and a needle shifting disc. The needle shifting cover is fixedly sleeved on the rear end of the core shaft. The needle shifting disc is rotationally sleeved on the needle shifting cover through a bearing. The outer wall of the needle shifting disc is also circumferentially provided with a shifting convex ring.

3. The cylindrical cell wicking needle mechanism of claim 2, wherein: The first shifting member is threadedly connected to the core pulling sleeve. The first shifting member is respectively provided with a stop ring and a locking nut at the front end and the rear end. The stop ring is fixedly sleeved on the rear end of the winding needle sleeve. The locking nut is threadedly connected to the rear end of the core pulling sleeve.

4. The cylindrical cell wicking needle mechanism of claim 2, wherein: The needle shifting cover is fixedly connected to the core shaft through a screw.

5. The cylindrical cell wicking needle mechanism of claim 1, wherein: Each winding needle sleeve is connected with a first driving assembly. The first driving assembly is used to drive the winding needle sleeve to rotate around the axis of the mounting disc. The mounting seat is rotationally connected with a transmission shaft. The axis of the transmission shaft is parallel to the axes of the front gears and the rear gears. The two ends of the transmission shaft are coaxially connected with intermediate transmission gears. The intermediate transmission gears at the two ends are respectively engaged with the front gears and the rear gears.

6. The cylindrical cell wicking needle mechanism of claim 1, wherein: The winding needle sleeve is provided with three winding needle sleeves. The three winding needle sleeves are distributed in a triangular manner with the center of the mounting disc as the center. The front end of the mounting seat is provided with a triangular head. The triangular head is provided with a bearing seat. The front gears are coaxially connected with the bearings in the bearing seat.

7. The cylindrical cell wicking needle mechanism of claim 1, wherein: The mounting disc is coaxially fixed with a turnover gear. The turnover gear is connected with a second driving assembly. The second driving assembly is used to drive the turnover gear to rotate, thereby driving the mounting disc to rotate on the machine head frame.

8. The cylindrical cell wicking needle mechanism of claim 1 or 7, wherein: The mounting disc is provided with a connecting cylinder matched with the winding needle sleeve. The connecting cylinder is vertically penetrated through the mounting disc and fixedly connected to the mounting disc. The winding needle sleeve is penetrated through the connecting cylinder and rotationally connected to the connecting cylinder through a bearing.

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