Winding and unwinding device

Abstract

The utility model provides a take-up and pay-off device which comprises a mounting plate, a take-up and pay-off reel assembly and a supporting assembly, the take-up and pay-off reel assembly is arranged on the first side of the mounting plate, the take-up and pay-off reel assembly comprises a take-up and pay-off reel and a bearing connecting sleeve which are coaxially arranged, and the bearing connecting sleeve is arranged close to the mounting plate; one end of the winding and unwinding shaft is arranged in the bearing connecting sleeve, the other end of the winding and unwinding shaft extends away from the bearing connecting sleeve in the first direction, and the winding and unwinding shaft is used for hanging a pole piece material roll; the supporting assembly is arranged on the mounting plate, abuts against the bearing connecting sleeve and is used for supporting the winding and unwinding shaft assembly. The supporting stability of the winding and unwinding shaft can be improved, and the winding and unwinding shaft is prevented from rotating to be bent and deformed when the load capacity is large.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery manufacturing equipment, in particular to a winding and unwinding device. Background Art

[0002] Lithium battery cells can be produced using either a winding or lamination process. The winding process uses a winding needle to roll the electrode sheet and separator into a cell, offering the advantage of higher efficiency compared to the lamination process. Current battery winding mechanisms, particularly for large cylindrical batteries, produce large and heavy electrode sheet rolls. This can easily cause the reel to bend and deform as the electrode sheet roll rotates, damaging the electrode sheet and thus affecting the quality of the battery cell. Utility Model Content

[0003] The utility model aims to solve the defects of the prior art and provides a winding and unwinding device, which can improve the support stability of the winding and unwinding reel and prevent the winding and unwinding reel from rotating and bending and deforming when the load is heavy.

[0004] In order to solve the above problems, the utility model provides a winding and unwinding device, comprising:

[0005] Mounting plate;

[0006] A retractable reel assembly is provided on a first side of the mounting plate, the retractable reel assembly comprising a coaxially arranged retractable reel and a bearing connection sleeve, the bearing connection sleeve being provided close to the mounting plate, one end of the retractable reel being provided inside the bearing connection sleeve, the other end of the retractable reel extending away from the bearing connection sleeve in a first direction, the retractable reel being used to suspend a pole piece roll;

[0007] A support assembly is provided on the mounting plate, the support assembly abuts against the bearing connecting sleeve, and is used to support the retractable reel assembly.

[0008] Furthermore, the two support assemblies are symmetrically arranged along the second direction, and there is a preset angle between the support assembly and the second direction, and the preset angle is 30° to 45°.

[0009] Furthermore, the preset angle is 45°.

[0010] Furthermore, the support assembly includes a fixing seat and a cam follower, the fixing seat is fixedly arranged on the mounting plate, the cam follower is arranged on the fixing seat, and the circumferential surface of the cam follower abuts against the bearing connecting sleeve.

[0011] Furthermore, the support assembly also includes an adjustment block and an adjustment rod, the adjustment block is arranged on the fixed seat, at least one adjustment hole is opened on the adjustment block, the adjustment rod is connected to the cam follower through the adjustment hole, and the cam follower is moved along a third direction through the adjustment hole and the adjustment rod, and the third direction is the extension direction of the adjustment rod.

[0012] Furthermore, a first bearing is provided between the retractable reel and the bearing connecting sleeve, and the retractable reel and the bearing connecting sleeve are connected via the first bearing.

[0013] Furthermore, it also includes a support seat, which is arranged on the second side of the mounting plate, the first side and the second side are two sides of the mounting plate arranged opposite to each other in the axial direction, and a bearing seat is arranged on the support seat, the bearing seat is connected to the bearing connecting sleeve, and a rotating shaft is arranged inside the bearing seat, and the connection between the rotating shaft and the retractable reel is connected through a second bearing.

[0014] Furthermore, it also includes a correction seat, which is arranged on the same side of the mounting plate as the support seat, and the support seat is slidingly connected to the correction seat. A first driving member is provided on the correction seat, and the first driving member is connected to the support seat. The first driving member is used to drive the support seat to move along the first direction to drive the bearing connecting sleeve and the retractable reel to move along the first direction.

[0015] Furthermore, it also includes a second driving member, which is arranged on the support seat and connected to the rotating shaft. The second driving member is used to drive the rotating shaft to rotate, so as to drive the bearing connecting sleeve and the retractable reel to rotate around their own axes.

[0016] Furthermore, the retractable reel is an inflatable shaft and further includes a third driving member, which is arranged on the support seat and is used to tighten the retractable reel.

[0017] The support assembly of the present invention is fixedly mounted on the mounting plate and is arranged at one end of the reel assembly, and the support assembly is abutted against the bearing connecting sleeve to support the reel assembly. The support assembly can extend the fulcrum of the reel assembly, shorten the cantilever length of the reel assembly, improve the structural strength of the reel assembly, and reduce or avoid the phenomenon that the reel load is too large and the deviation amplitude is too large, resulting in poor pole piece performance. In addition, the support assembly in the present invention is fixedly mounted on the mounting plate and is arranged at one end of the reel assembly, compared with the phenomenon that a movable support assembly is arranged at the end of the reel assembly away from the mounting plate (the support assembly is moved away when changing the roll, and the reel assembly is supported after the material roll is replaced), it can avoid the phenomenon that both ends of the reel assembly are supported, which makes the reel assembly or the support assembly easily stuck or damaged. The support assembly in the present invention not only plays a supporting role for the reel assembly, but also helps to extend the service life of the reel assembly and reduce the use cost of the reel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a side structural schematic diagram of the reeling and unreeling device provided in an embodiment of the present utility model;

[0019] Figure 2 This is a front view structural diagram of the reeling and unreeling device provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of force analysis of the support assembly provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In addition, in the description of the present invention, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0023] In this specification, the term "as an alternative embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one alternative embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0024] Combine Figure 1 and Figure 2 As shown, this embodiment provides a reeling and unreeling device, comprising: a mounting plate 10, a reeling and unreeling shaft assembly 20 and a support assembly 30, wherein:

[0025] The reel assembly 20 is arranged on the first side of the mounting plate 10. The reel assembly 20 includes a reel 21 and a bearing connection sleeve 22 arranged coaxially. The bearing connection sleeve 22 is arranged close to the mounting plate 10. One end of the reel 21 is arranged inside the bearing connection sleeve 22. The other end of the reel 21 is arranged in the axial direction (the first direction, i.e., Figure 1 The x-axis direction in the middle) extends away from the bearing connecting sleeve 22, so that the retractable reel 21 is suspended, and the retractable reel 21 is used to suspend the pole piece material roll 100;

[0026] The support assembly 30 is disposed on the mounting plate 10 , and the support assembly 30 abuts against the bearing connecting sleeve 22 . The support assembly 30 is used to support the retractable reel assembly 20 .

[0027] The reeling device in this embodiment, by arranging a support assembly on the mounting plate, the support assembly abuts against the bearing connecting sleeve, can play the role of supporting the reeling shaft assembly, the support assembly can extend the fulcrum of the reeling shaft assembly, shorten the cantilever length of the reeling shaft, improve the structural strength of the reeling shaft, and can reduce or avoid the phenomenon that the reeling shaft is too heavy and its deviation amplitude is too large, resulting in poor pole piece; in addition, the support assembly in this embodiment is fixedly arranged on the mounting plate and is arranged at one end of the reeling shaft assembly, compared with arranging a movable support assembly at the end of the reeling shaft away from the mounting plate (the support assembly is moved away when changing the roll, and the reeling shaft is supported after the material roll is replaced), it can avoid supporting both ends of the reeling shaft, making the reeling shaft or the support assembly easily stuck or damaged. The support assembly in this embodiment not only plays a supporting role for the reeling shaft assembly, but also helps to extend the service life of the reeling device and reduce the use cost of the reeling device.

[0028] On the basis of the above embodiment, as an optional embodiment, two support assemblies 30 are provided on the mounting plate 10, and the two support assemblies 30 are arranged in the vertical direction (the second direction, i.e. Figure 2 The two support assemblies 30 are symmetrically arranged (in the z-axis direction), and the angle between each support assembly 30 and the vertical direction is a predetermined angle a, which is 30° to 45°. Thus, the two support assemblies 30 are symmetrically arranged, and the angle between each support assembly 30 and the vertical direction is set to the predetermined angle a. The support assemblies 30 can better support the bearing connecting sleeve 22, thereby improving the structural strength of the retractable reel 21.

[0029] Based on the above embodiment, as a preferred embodiment, Figure 3 As shown, the preset angle a is 45°, thus, the component force provided by one of the support components 30 is F1, and the component force provided by the other support component 30 is F2. The resultant force F of F1 and F2 is set in the vertical direction. The resultant force F can better support the bearing connecting sleeve 22 and the retractable reel 21, and the direction of the resultant force F is set in the vertical direction, which is conducive to further reducing the deviation amplitude of the retractable reel 21.

[0030] Based on the above embodiment, as an optional implementation, the support assembly 30 includes a fixing seat 31 and a cam follower 32. The fixing seat 31 is fixedly mounted on the mounting plate 10, and the cam follower 32 is mounted on the fixing seat 31. The circumferential surface of the cam follower 32 abuts against the bearing connecting sleeve 22. Thus, the circumferential surface of the cam follower 32 abuts against the bearing connecting sleeve 22, which can reduce the friction between the cam follower 32 and the bearing connecting sleeve 22 when the bearing connecting sleeve 22 and the retractable reel 21 move in the axial direction.

[0031] Based on the above embodiment, as an optional embodiment, the support assembly 30 further includes an adjustment block 33 and an adjustment rod (not shown). The adjustment block 33 is disposed on the fixing base 31. The adjustment block 33 is provided with at least one adjustment hole (not shown). The adjustment rod passes through the adjustment hole and is connected to the cam follower 32. The cam follower 32 is moved in a third direction via the adjustment hole and the adjustment rod. The third direction is the extension direction of the adjustment rod, i.e., the third direction is the direction of the force component F1 or the force component F2. Thus, by rotating the adjustment rod in the adjustment hole, the adjustment rod moves in the third direction, thereby driving the cam follower 32 to move in the third direction, adjusting the contact force between the cam follower 32 and the bearing sleeve 22. The cam follower 32 adjusts the horizontality of the bearing sleeve 22 and the retractable reel 21, so that the bearing sleeve 22 and the retractable reel 21 can always remain perpendicular to the mounting plate 10, thereby preventing the retractable reel 21 from sagging or tilting, which would cause the retractable reel 21 to deviate excessively and cause a defective pole piece. As an optional implementation, the adjustment rod may be a bolt or a screw.

[0032] Based on the above embodiment, as an optional implementation, a first bearing 23 is provided between the retractable reel 21 and the bearing connecting sleeve 22, and the retractable reel 21 and the bearing connecting sleeve 22 are connected via the first bearing 23. As an optional implementation, the first bearing 23 is a deep groove ball bearing.

[0033] On the basis of the above embodiment, as an optional embodiment, the rewinding device further includes a support seat 40, which is arranged on the second side of the mounting plate 10, and the first side and the second side are two sides of the mounting plate 10 arranged opposite to each other in the axial direction. A bearing seat 41 is provided on the support seat 40, and the bearing seat 41 is connected to the bearing connecting sleeve 22. A rotating shaft 42 is provided inside the bearing seat 41, and the connection between the rotating shaft 42 and the rewinding shaft 21 is connected through a second bearing 43. Thus, the rotation of the rotating shaft 42 can drive the bearing connecting sleeve 22 and the rewinding shaft 21 to rotate around their axial direction. A second bearing 43 is provided at the connection between the rotating shaft 42 and the rewinding shaft 21. The second bearing 43 can play a supporting role and can also absorb part of the axial force and radial force of the rewinding shaft 21, which is conducive to further improving the stability of the support of the rewinding shaft 21. As an optional embodiment, the second bearing 43 is a tapered roller bearing.

[0034] On the basis of the above embodiment, as an optional embodiment, the rewinding and unwinding device further includes a correction seat 50, which is arranged on the same side of the mounting plate 10 as the support seat 40, and the correction seat 50 is fixedly arranged on the mounting plate 10, and the support seat 40 is slidably connected to the correction seat 50. A first driving member 60 is provided on the correction seat 50, and the first driving member 60 is connected to the support seat 40. The first driving member 60 is used to drive the support seat 40 to move in the axial direction, so as to drive the bearing connecting sleeve 22 and the rewinding and unwinding shaft 21 to move in the axial direction. Therefore, when the pole piece roll 100 needs to be loaded, the first driving member 60 can push the bearing connecting sleeve 22 and the rewinding and unwinding shaft 21 to move in the axial direction, so that the pole piece roll 100 moves away from the mounting plate 10, so that the pole piece roll 100 can be loaded.

[0035] Based on the above embodiment, as an optional embodiment, the rewinding and unwinding device further includes a second drive member 70 and a third drive member 80. The second drive member 70 and the third drive member 80 are both disposed on the support base 40. The second drive member 70 is connected to the rotating shaft 42. The second drive member 70 is used to drive the rotating shaft 42 to rotate, thereby driving the bearing connecting sleeve 22 and the rewinding and unwinding shaft 21 to rotate about their own axes, thereby driving the pole piece roll 100 to rotate. The third drive member 80 is connected to the rewinding and unwinding shaft 21 via a pull shaft. The pull shaft is located inside the rotating shaft 42. The third drive member 80 tightens the rewinding and unwinding shaft 21 via the pull shaft to secure the pole piece roll 100 on the rewinding and unwinding shaft 21. As an optional embodiment, the rewinding and unwinding shaft 21 is an inflatable shaft.

[0036] In this embodiment, the first driving member 60, the second driving member 70 and the third driving member 80 can be motors or cylinders, and can be matched with transmission members such as screw rods, transmission wheels or synchronous belts to achieve transmission connection.

[0037] The following combination Figure 1 and Figure 2 The working principle of the reeling and unreeling device of this embodiment is described as follows:

[0038] The pole piece material roll 100 is hung on the winding and unwinding shaft 21, the third driving member 80 tightens the winding and unwinding shaft 21 to fix the pole piece material roll 100 on the winding and unwinding shaft 21, at this time, the circumferential surface of the cam follower 32 abuts against the bearing connecting sleeve 22, the cam follower 32 supports the bearing connecting sleeve 22 to support the winding and unwinding shaft 21, if the winding and unwinding shaft 21 is drooping or upwarping, then the position of the cam follower 32 is adjusted through the adjusting block and the adjusting rod to keep the winding and unwinding shaft 21 vertical with the mounting plate 10, then the second driving member 70 drives the winding and unwinding shaft 21 to rotate and the first driving member 70 drives the winding and unwinding shaft 21 to move along the axial direction to feed the pole piece material roll 100, when the winding and unwinding shaft 21 and the bearing connecting sleeve 22 move along the axial direction, the cam follower 32 always abuts against the bearing connecting sleeve 22 to support the bearing connecting sleeve 22 and the winding and unwinding shaft 21.

[0039] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications shall fall within the protection scope of the present disclosure.

Claims

1. A reeling and unreeling device, characterized in that: include: Mounting plate; A retractable reel assembly is provided on a first side of the mounting plate, the retractable reel assembly comprising a coaxially arranged retractable reel and a bearing connection sleeve, the bearing connection sleeve being provided close to the mounting plate, one end of the retractable reel being provided inside the bearing connection sleeve, the other end of the retractable reel extending away from the bearing connection sleeve in a first direction, the retractable reel being used to suspend a pole piece roll; A support assembly is provided on the mounting plate, the support assembly abuts against the bearing connecting sleeve, and is used to support the retractable reel assembly.

2. The rewinding and unwinding device according to claim 1, characterized in that: The two support assemblies are symmetrically arranged along the second direction, and a preset angle is formed between the support assemblies and the second direction, and the preset angle is 30° to 45°.

3. The rewinding and unwinding device according to claim 2, characterized in that: The preset angle is 45.

4. The rewinding and unwinding device according to claim 1, characterized in that: The support assembly includes a fixing seat and a cam follower. The fixing seat is fixedly arranged on the mounting plate. The cam follower is arranged on the fixing seat. The circumferential surface of the cam follower abuts against the bearing connecting sleeve.

5. The rewinding and unwinding device according to claim 4, characterized in that: The support assembly also includes an adjustment block and an adjustment rod. The adjustment block is arranged on the fixing seat. At least one adjustment hole is opened on the adjustment block. The adjustment rod is connected to the cam follower through the adjustment hole. The cam follower is moved along a third direction through the adjustment hole and the adjustment rod. The third direction is the extension direction of the adjustment rod.

6. The rewinding and unwinding device according to claim 1, characterized in that: A first bearing is provided between the retractable reel and the bearing connecting sleeve, and the retractable reel and the bearing connecting sleeve are connected via the first bearing.

7. The rewinding and unwinding device according to claim 1, characterized in that: It also includes a support seat, which is arranged on the second side of the mounting plate, the first side and the second side are two sides of the mounting plate arranged opposite to each other in the axial direction, a bearing seat is arranged on the support seat, the bearing seat is connected to the bearing connecting sleeve, a rotating shaft is arranged inside the bearing seat, and the connection between the rotating shaft and the retractable reel is connected through a second bearing.

8. The rewinding and unwinding device according to claim 7, characterized in that: It also includes a correction seat, which is arranged on the same side of the mounting plate as the support seat, and the support seat is slidingly connected to the correction seat. A first driving member is provided on the correction seat, and the first driving member is connected to the support seat. The first driving member is used to drive the support seat to move along the first direction to drive the bearing connecting sleeve and the retractable reel to move along the first direction.

9. The rewinding and unwinding device according to claim 7, characterized in that: It also includes a second driving member, which is arranged on the support seat and connected to the rotating shaft. The second driving member is used to drive the rotating shaft to rotate, so as to drive the bearing connecting sleeve and the retractable reel to rotate around their own axes.

10. The rewinding and unwinding device according to claim 7, characterized in that: The retractable reel is an inflatable shaft and further includes a third driving member. The third driving member is arranged on the support seat and is used to tighten the retractable reel.

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