Unwinding mechanism, reel changing device and battery cell winding equipment

Abstract

The utility model relates to the technical field of battery processing equipment, in particular to an unwinding mechanism, a reel changing device and battery cell winding equipment. An unwinding mechanism comprises an unwinding assembly, a winding assembly, a driving assembly and a driving assembly, the unwinding assembly comprises an unwinding shaft, the unwinding shaft is rotatably arranged, and the unwinding shaft comprises a material winding section; and the roll preparation assembly comprises a feeding assembly and a sleeve, and the sleeve is arranged on the unwinding shaft in a sleeving mode and located on one side of the material roll section in the axial direction of the unwinding shaft. According to the unwinding mechanism, the unwinding speed of the unwinding shaft can be increased while the manufacturing cost of the unwinding shaft is reduced.

Description

Technical Field

[0001] This application relates to the field of battery processing equipment technology, and in particular to an unwinding mechanism, a winding device, and a cell winding device. Background Technology

[0002] An unwinding mechanism is used to unwind strip material downstream. It typically includes an unwinding shaft with a roll of material mounted on it for unwinding the strip downstream. In related technologies, to ensure continuous unwinding, multiple rolls of material are mounted axially on the unwinding shaft. Once one roll is unwound, a new roll is pushed to continue unwinding. Because multiple rolls are mounted on the unwinding shaft, it must bear the weight of these rolls, resulting in a large radial force on the shaft. This places high demands on the mechanical strength of the unwinding shaft, increases its manufacturing cost, and also affects the unwinding speed. Utility Model Content

[0003] This application discloses an unwinding mechanism, a winding device, and a battery cell winding equipment, which can reduce the manufacturing cost of the unwinding shaft while increasing the unwinding speed of the unwinding shaft.

[0004] To achieve the above objectives, firstly, this application discloses a roll-off mechanism, comprising:

[0005] An unwinding assembly, the unwinding assembly including an unwinding shaft rotatably disposed, the unwinding shaft including a material roll segment; and,

[0006] A roll preparation assembly, comprising a feeding assembly and a sleeve, wherein the sleeve is fitted onto the unwinding shaft and located on one side of the roll section along the axial direction of the unwinding shaft.

[0007] Because the sleeve is fitted onto the unwinding shaft and located on one side of the material roll section along the shaft's axial direction, when the unwinding shaft starts to rotate, causing the material roll section to unwind the material strip downstream, the unwinding shaft only needs to rotate the material roll fitted onto itself, without needing to rotate the material roll fitted onto the sleeve. In simpler terms, the unwinding shaft only needs to bear the weight of one material roll fitted onto itself, while the weight of the material roll fitted onto the sleeve is borne by the sleeve. This reduces the mechanical strength requirements on the unwinding shaft, thereby lowering its manufacturing cost. Furthermore, because the unwinding shaft has a smaller load-bearing capacity, its unwinding speed can be increased to some extent.

[0008] Optionally, the sleeve is used to carry the material roll, and the feeding assembly is used to drive the material roll to move axially along the unwinding shaft.

[0009] Optionally, the feeding assembly includes:

[0010] Driver components; and,

[0011] A pusher component is connected to the drive assembly, which drives the pusher component to move axially along the unwinding shaft.

[0012] Optionally, a pad is provided on the side of the pusher facing the coil segment.

[0013] By placing a pad on the side of the pusher facing the coil section, when the coil is pushed by the pusher, the coil will contact the pad instead of directly contacting the pusher. In this way, on the one hand, the pad can protect the pusher, thus avoiding damage to the pusher. When the pad is damaged, it can be replaced directly, which can reduce maintenance costs. On the other hand, the contact between the pad and the coil is a flexible contact, which can prevent the coil from being scratched.

[0014] Optionally, the pusher is fitted onto the sleeve.

[0015] By fitting the pusher onto the sleeve, when the pusher pushes the coil on the sleeve, the pusher can make full contact with one end of the coil. This results in two advantages: firstly, a larger contact area between the pusher and the coil, thus preventing excessive local stress and deformation of the coil; secondly, a more balanced force distribution across the entire coil, ensuring that the coil is smoothly and steadily pushed along the unwinding shaft to the coil section.

[0016] Optionally, the pusher is located on at least one side of the sleeve along the radial direction of the sleeve.

[0017] Optionally, the backup volume component further includes:

[0018] A clamping assembly, comprising a first driving member and a first abutting member, wherein the first driving member is disposed on the pushing member and the first abutting member is connected to the first driving member, and the first driving member is used to drive the first abutting member to move toward or away from the sleeve.

[0019] Since the first abutment is connected to the first drive member, the first drive member can drive the first abutment to move towards or away from the sleeve. Therefore, when the pusher pushes the material roll on the sleeve to move relative to the sleeve along the axial direction of the unwinding shaft, the first drive member can drive the first abutment to move towards the sleeve, so that the first abutment abuts against the material roll on the sleeve. In this way, the first abutment acts like a hand holding the material roll, thereby preventing the material roll from swaying relative to the sleeve during the movement of the material roll relative to the sleeve along the axial direction of the unwinding shaft.

[0020] Optionally, the number of clamping components is multiple, and the multiple clamping components are arranged at intervals around the outer peripheral wall of the sleeve.

[0021] By having multiple clamping components spaced apart around the outer periphery of the sleeve, multiple first abutments can support the material roll from multiple angles and positions, thereby better preventing the material roll from swaying relative to the sleeve.

[0022] Optionally, the unwinding mechanism further includes a mounting component, wherein the pusher is slidably disposed on the mounting component along the axial direction of the unwinding shaft.

[0023] Optionally, the unwinding shaft further includes:

[0024] A connecting section is connected to the material roll section, and a sleeve is fitted onto the connecting section. The outer diameter of the connecting section is smaller than the outer diameter of the material roll section.

[0025] Optionally, the unwinding shaft further includes:

[0026] A connecting section is connected to the material roll section, and a sleeve is fitted onto the connecting section. The outer diameter of the connecting section is smaller than the outer diameter of the material roll section.

[0027] By making the outer diameter of the connecting section smaller than that of the coil section, it is easier to install a sleeve on the connecting section, and it also makes the entire unwinding shaft lighter.

[0028] Optionally, the sleeve is coaxially arranged with the material roll segment, and the diameter of the sleeve is equal to the diameter of the material roll segment.

[0029] In this way, on the one hand, it can be ensured that when the pusher pushes the coil on the sleeve, the coil can smoothly transition from the sleeve to the unwinding shaft. On the other hand, it can also be ensured that after the coil is pushed onto the coil section of the unwinding shaft, the coil can be stably fitted onto the coil section of the unwinding shaft.

[0030] Optionally, a baffle is provided on the outer peripheral wall of the sleeve, and the baffle protrudes radially from the outer peripheral wall of the sleeve.

[0031] Since the material stop protrudes radially from the outer circumferential wall of the sleeve, when putting the material roll onto the sleeve, it is sufficient to ensure that one end of the material roll abuts against the material stop, which is considered to mean that the material roll is installed in place on the sleeve, thus ensuring the repeatability accuracy of the material roll on the sleeve.

[0032] Optionally, a rolling element is provided on the outer peripheral wall of the sleeve.

[0033] By installing rolling elements on the outer peripheral wall of the sleeve, the friction between the material roll and the outer peripheral wall of the sleeve can be changed from static friction to rolling friction, thereby reducing the frictional force between the material roll and the outer peripheral wall of the sleeve. This makes the material roll move more smoothly relative to the sleeve along the axial direction of the unwinding shaft.

[0034] Optionally, the number of the rolling elements is multiple, and the multiple rolling elements are arranged at intervals along an axial direction parallel to the sleeve to form a rolling element group.

[0035] Optionally, multiple sets of the rolling elements are provided at circumferential intervals along the sleeve.

[0036] By arranging multiple sets of rolling elements at circumferential intervals on the sleeve, the friction between each position on the outer circumferential wall of the sleeve and the material roll can be reduced, thereby making the material roll move more smoothly relative to the sleeve along the axial direction of the unwinding shaft.

[0037] Optionally, the backup volume component further includes:

[0038] A limiting assembly, the limiting assembly including a connecting rod and a second driving member, the second driving member being disposed on the mounting member, the outer peripheral wall of the sleeve being provided with a mounting groove extending along the axial direction of the sleeve, and the connecting rod being rotatably disposed in the mounting groove around the hinge portion;

[0039] The connecting rod includes a first end and a second end, which are located on both sides of the hinge portion, with the first end close to the material roll segment. A limiting member is provided on the first end, and the second driving member is connected to the second end.

[0040] When the limiting component protrudes from the outer peripheral wall of the sleeve, it can prevent the material roll sleeved on the sleeve from sliding close to the material roll section along the unwinding axis. In this way, when the material strip in the material roll on the material roll section has not been completely unwound, the limiting component can protrude from the outer peripheral wall of the sleeve, thereby preventing the material roll on the sleeve from abnormally sliding onto the material roll section under vibration and other effects, which would affect the normal unwinding of the material roll section, and thus making the operation of the unwinding mechanism more reliable.

[0041] When the material strip in the material roll section is unwound, the second drive member can rotate around the hinge part through the second end drive rod, so that the limiting member is accommodated in the mounting groove. In this way, the blocking effect of the limiting member on the material roll will disappear, which will help the pusher to push the material roll sleeved on the sleeve to the material roll section.

[0042] Optionally, the second driving member is used to drive the connecting rod to rotate about the hinge portion through the second end, so that the limiting member protrudes from the outer peripheral wall of the sleeve or is accommodated in the mounting groove.

[0043] Optionally, the unwinding mechanism further includes a mounting component, and the unwinding assembly further includes:

[0044] A support base is slidably disposed on the mounting member along an axial direction parallel to the unwinding shaft, and the unwinding shaft is rotatably disposed on the support base;

[0045] A third driving member, disposed on the support base and connected to the unwinding shaft, is used to drive the unwinding shaft to rotate; and

[0046] A fourth driving member is disposed on the mounting member and connected to the support base, for driving the support base to slide along an axial direction parallel to the unwinding shaft.

[0047] Since the support base is slidably mounted on the mounting component along an axial direction parallel to the unwinding shaft, and the fourth driving component is mounted on the mounting component and connected to the support base, the fourth driving component can drive the support base to slide along an axial direction parallel to the unwinding shaft, thereby driving the unwinding shaft to slide along its own axial direction. When the unwinding shaft slides along its own axial direction, it can play a role in correcting the position of the material strip along the width direction of the material strip.

[0048] Optionally, the sleeve is fixed to the mounting member, and the support base and the sleeve are located on both sides of the mounting member along the axial direction of the unwinding shaft.

[0049] By positioning the support base and sleeve on both sides of the mounting component along the axial direction of the unwinding shaft, the space on both sides of the mounting component can be fully utilized by the support base and sleeve, making the overall unwinding mechanism more compact.

[0050] Secondly, this application discloses a roll changing device, comprising:

[0051] The unwinding mechanism described in any of the first aspects above.

[0052] Since the unwinding mechanism has a low manufacturing cost and a high unwinding speed, when the unwinding device includes this unwinding mechanism, the cost of the entire unwinding device can be reduced to a certain extent, and the unwinding efficiency of the entire unwinding device can be improved.

[0053] Optionally, the number of unwinding mechanisms may be multiple.

[0054] When there are multiple unwinding mechanisms, they can unwind alternately, thus improving the continuity of unwinding.

[0055] Thirdly, this application discloses a battery cell winding device, including the winding device described in any of the second aspects above.

[0056] Since the rewinding device has low cost and high unwinding efficiency, when the battery cell winding equipment includes the rewinding device, the cost of the battery cell winding equipment can be reduced while the efficiency of winding the battery cells can be improved.

[0057] Compared with the prior art, the beneficial effects of this application are as follows:

[0058] In this application, since the sleeve is fitted onto the unwinding shaft and located on one side of the material roll section along the axial direction of the unwinding shaft, when the unwinding shaft starts to rotate, causing the material roll section to unwind the material strip downstream, the unwinding shaft only needs to rotate the material roll fitted onto itself, without needing to rotate the material roll fitted onto the sleeve. In simpler terms, the unwinding shaft only needs to bear the weight of one material roll fitted onto itself, while the weight of the material roll fitted onto the sleeve is borne by the sleeve. This reduces the mechanical strength requirements of the unwinding shaft, thereby reducing its manufacturing cost. Furthermore, because the unwinding shaft has a smaller load-bearing capacity, its unwinding speed can be increased to some extent. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a schematic diagram of the structure of an unwinding mechanism provided in one embodiment of this application;

[0061] Figure 2 yes Figure 1 A schematic diagram of the unwinding mechanism from a negative Y-axis perspective;

[0062] Figure 3 yes Figure 2 A schematic diagram of the unwinding mechanism from the negative Z-axis viewpoint.

[0063] Figure 4 yes Figure 2 A partial structural diagram of the backup roll assembly;

[0064] Figure 5 yes Figure 2 A partial structural diagram of the unwinding mechanism;

[0065] Figure 6 This is a schematic diagram of the structure of a roll changing device provided in one embodiment of this application;

[0066] Figure 7This is a schematic diagram of the structure of a battery cell winding device provided in one embodiment of this application.

[0067] Explanation of reference numerals in the attached figures:

[0068] 1-Installation components;

[0069] 2-Unwinding assembly; 21-Unwinding shaft; 211-Connecting section; 212-Roll section; 22-Support base; 23-Third drive component; 24-Fourth drive component;

[0070] 3-Roll preparation assembly; 30-Feeding assembly; 31-Drive assembly; 311-Fifth drive component; 312-Sixth drive component; 32-Push component; 321-Padded block; 322-Guide rod; 33-Sleeve; 330-Rolling component assembly; 331-Blocking component; 332-Rolling component; 333-Mounting groove; 34-Clamping assembly; 341-First drive component; 342-First abutting component; 35-Limiting assembly; 351-Connecting rod; 3511-First end; 3511a-Limiting component; 3512-Second end; 352-Second drive component; 353-Hinge;

[0071] 100-Unwinding mechanism; 200-Roll changing device; 300-Cell winding equipment; 301-Rolling needle. Detailed Implementation

[0072] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0074] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0075] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0076] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0077] Before explaining the technical solution of this application, the background technology of this application shall be explained first.

[0078] An unwinding mechanism is a mechanism used to unwind strip downstream. An unwinding mechanism typically includes an unwinding shaft with a strip of material mounted on it for unwinding the strip downstream. In related technologies, to ensure continuous unwinding, multiple strips of material are mounted axially on the unwinding shaft. When one strip is unwound, a new strip is pushed to continue unwinding. Because multiple strips are mounted on the unwinding shaft, the unwinding bearing is subjected to a large radial force, requiring high strength from the unwinding shaft and increasing its manufacturing cost. Furthermore, multiple strips also affect the unwinding speed of the unwinding shaft. Therefore, this application provides a new unwinding mechanism to solve the above problems.

[0079] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0080] Figure 1 This is a schematic diagram of the structure of an unwinding mechanism 100 provided in one embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the unwinding mechanism 100 from a negative Y-axis perspective.

[0081] See Figure 1 and Figure 2 The unwinding mechanism 100 includes a mounting component 1, an unwinding assembly 2, and a spare winding assembly 3. The unwinding assembly 2 includes an unwinding shaft 21, which is rotatably mounted and includes a material roll segment 212. The spare winding assembly 3 is mounted on the mounting component 1 and includes a feeding assembly 30 and a sleeve 33. The sleeve 33 is fitted onto the unwinding shaft 21 and is located on one side of the material roll segment 212 along the axial direction of the unwinding shaft 21.

[0082] In this embodiment, when unwinding the strip downstream through the unwinding mechanism 100, firstly, the strip can be sleeved on both the unwinding shaft 21 and the sleeve 33. Then, since the unwinding shaft 21 is rotatably set, the unwinding shaft 21 can start to rotate. When the unwinding shaft 21 starts to rotate, the strip in the strip on the unwinding shaft 21 can be unwound downstream.

[0083] When the material strip in the unwinding shaft 21 is unwound, since the spare winding assembly 3 is installed on the mounting part 1 and the sleeve 33 is sleeved on the unwinding shaft 21 and located on one side of the material roll section 212 along the axial direction of the unwinding shaft 21, the feeding assembly 30 can drive the material roll to move along the axial direction of the unwinding shaft 21. Furthermore, when the feeding assembly 30 drives the material roll to move along the axial direction of the unwinding shaft 21, the feeding assembly 30 can push the material roll sleeved on the sleeve 33 to the material roll section 212.

[0084] There are several ways in which the feeding assembly 30 drives the material roll to move axially along the unwinding shaft 21. In one possible implementation, see [link to relevant documentation]. Figure 1 and Figure 2 In some embodiments, the feeding assembly 30 includes a driving assembly 31 and a pusher 32, wherein the pusher 32 is connected to the driving assembly 31, and the driving assembly 31 is used to drive the pusher 32 to move axially along the unwinding shaft 21, so as to drive the material roll to move axially along the unwinding shaft 21, thereby achieving the purpose of pushing the material roll sleeved on the sleeve 33 to the material roll segment 212.

[0085] Once the roll originally mounted on the sleeve 33 is pushed onto the roll section 212, the roll section 212 can continue to unwind the strip in the roll downstream.

[0086] As can be seen, when the material strip in the roll on the unwinding shaft 21 is unwound, since the sleeve 33 is sleeved on the unwinding shaft 21 and located on one side of the roll section 212 along the axial direction of the unwinding shaft 21, the pusher 32 driven by the drive assembly 31 pushes the roll on the sleeve 33 to the roll section 212, so that the roll section 212 can continue to unwind the material strip downstream.

[0087] Since the sleeve 33 is fitted onto the unwinding shaft 21 and located on one side of the material roll section 212 along the axial direction of the unwinding shaft 21, when the unwinding shaft 21 starts to rotate, causing the material roll section 212 to unwind the material roll downstream, the unwinding shaft 21 only needs to rotate the material roll fitted onto itself, without needing to rotate the material roll fitted onto the sleeve 33. In simpler terms, the unwinding shaft 21 only needs to bear the weight of one material roll fitted onto itself, while the weight of the material roll fitted onto the sleeve 33 is borne by the sleeve 33. This reduces the mechanical strength requirements of the unwinding shaft 21, thereby reducing its manufacturing cost. Furthermore, because the unwinding shaft 21 bears a smaller load, its unwinding speed can be increased to some extent.

[0088] It should be noted that there are multiple ways to implement the aforementioned driver component 31. For one possible implementation, see [link to relevant documentation]. Figure 2 and Figure 3 , Figure 3 yes Figure 2 The unwinding mechanism 100 is shown in the structural diagram from the negative Z-axis view. The drive assembly 31 may include a fifth drive member 311 and a sixth drive member 312. Both the fifth drive member 311 and the sixth drive member 312 are disposed on the mounting member 1 and are connected to the pusher member 32. In this way, the fifth drive member 311 and the sixth drive member 312 can synchronously drive the pusher member 32 to move along the axial direction of the unwinding shaft 21.

[0089] The fifth driving component 311 and the sixth driving component 312 can both be cylinders or other structures that can drive the pusher component 32 to move axially along the unwinding shaft 21. This embodiment does not limit this.

[0090] In order to make the pusher 32 move more smoothly along the axial direction of the unwinding shaft 21, in some embodiments, the pusher 32 can be slidably disposed on the mounting member 1 along the axial direction of the unwinding shaft 21, so that the pusher 32 can move more smoothly along the axial direction of the unwinding shaft 21.

[0091] Specifically, the pusher 32 may be provided with a guide rod 322 extending along the axial direction of the unwinding shaft 21. The guide rod 322 is slidably inserted into the mounting part 1 along the axial direction of the unwinding shaft 21. In this way, the purpose of making the pusher 32 slidably disposed on the mounting part 1 along the axial direction of the unwinding shaft 21 can be achieved.

[0092] The number of guide rods 322 can be two or three, etc., and this embodiment does not limit this.

[0093] In some embodiments, see Figure 1 The pusher component 32 is mounted on the sleeve 33.

[0094] By having the pusher 32 fitted onto the sleeve 33, when the pusher 32 pushes the coil on the sleeve 33, the pusher 32 can make full contact with one end of the coil. This results in a larger contact area between the pusher 32 and the coil, thus preventing excessive local stress and deformation of the coil. On the other hand, it also ensures that the coil is subjected to more even stress throughout its length, thereby better guaranteeing that the coil can be smoothly and steadily pushed along the axial direction of the unwinding shaft 21 to the coil section 212.

[0095] Among them, the aforementioned pusher 32 can be as follows: Figure 1 The plate-shaped parts shown are examples of other shapes, but the pusher 32 can also be other shapes. This embodiment does not limit this.

[0096] It should be noted that the above-mentioned pusher 32 being sleeved on the sleeve 33 is only one possible implementation. In another possible implementation, the pusher 32 is located on at least one side of the sleeve 33 along the radial direction of the sleeve 33. That is, the pusher 32 is not sleeved on the sleeve 33. This arrangement facilitates the installation of the pusher 32 and can also reduce the possibility of mutual interference between the pusher 32 and the sleeve 33 to a certain extent.

[0097] Understandably, in order to ensure that the pusher 32 can push the material roll on the sleeve 33 to move relative to the sleeve 33 along the axial direction of the unwinding shaft 21, there can be a certain gap between the pusher 32 and the sleeve 33. This can avoid friction between the pusher 32 and the sleeve 33 to a certain extent.

[0098] Considering that when the pusher 32 pushes the coil on the sleeve 33, a contact force will be generated between the pusher 32 and the coil, over time, on the one hand, the pusher 32 may be damaged by friction due to the contact force, and on the other hand, the pusher 32 may also scratch the coil. To avoid this situation, in some embodiments, see Figure 1 and Figure 2 A pad 321 is provided on the side of the pusher 32 facing the material roll section 212.

[0099] By providing a pad 321 on the side of the pusher 32 facing the roll section 212, when the roll is pushed by the pusher 32, the roll will contact the pad 321 instead of directly contacting the pusher 32. In this way, on the one hand, the pad 321 can protect the pusher 32, thereby avoiding damage to the pusher 32. When the pad 321 is damaged, it can be replaced directly, which can reduce maintenance costs. On the other hand, the contact between the pad 321 and the roll is a flexible contact, thereby avoiding scratching the roll.

[0100] The pad 321 can be a rubber pad or a silicone pad, etc., and this embodiment does not limit it. The shape of the pad 321 can be annular and surround the sleeve 33. Of course, the pad 321 can also be other possible shapes, and this embodiment does not limit it.

[0101] In some embodiments, see Figure 1 and Figure 2 The unwinding shaft 21 also includes a connecting section 211, which is connected to the material roll section 212. The sleeve 33 is fitted onto the connecting section 211, and the outer diameter of the connecting section 211 is smaller than the outer diameter of the material roll section 212.

[0102] By making the outer diameter of the connecting section 211 smaller than the outer diameter of the coil section 212, it is convenient to fit the sleeve 33 on the connecting section 211, and it also makes the entire unwinding shaft 21 lighter.

[0103] In some embodiments, see Figure 1 and Figure 2 The sleeve 33 is coaxially arranged with the material roll section 212, and the diameter of the sleeve 33 is equal to the diameter of the material roll section 212.

[0104] In this way, on the one hand, it can be ensured that when the pusher 32 pushes the material roll on the sleeve 33, the material roll can smoothly transition from the sleeve 33 to the unwinding shaft 21. On the other hand, it can also be ensured that after the material roll is pushed onto the material roll section 212 of the unwinding shaft 21, the material roll can be stably fitted onto the material roll section 212 of the unwinding shaft 21.

[0105] Furthermore, in order to better ensure that the material roll can be stably fitted onto the unwinding shaft 21 after it is pushed onto the unwinding shaft 21, in some embodiments, the unwinding shaft 21 is an air-expanding shaft. In this way, the material roll pushed onto the unwinding shaft 21 can be fitted onto the unwinding shaft 21 more quickly and stably.

[0106] In some embodiments, see Figure 2 and 4 , Figure 4 yes Figure 2 A partial structural diagram of the intermediate roll assembly 3 shows that a material stop 331 is provided on the outer peripheral wall of the sleeve 33, and the material stop 331 protrudes radially from the outer peripheral wall of the sleeve 33.

[0107] Since the material stop 331 protrudes radially from the outer peripheral wall of the sleeve 33, when the material roll is put onto the sleeve 33, it is only necessary to ensure that one end of the material roll abuts against the material stop 331, and it can be considered that the material roll is installed in place on the sleeve 33, thereby ensuring the repeatability accuracy of the material roll on the sleeve 33.

[0108] The aforementioned baffle 331 can be a ring-shaped structure. When the baffle 331 is a ring-shaped structure, the ring-shaped structure can make contact with the entire circumference of one end of the material roll, thereby enabling the baffle 331 to play a better positioning role for the material roll, and thus better ensuring the repeatability accuracy of the material roll on the sleeve 33.

[0109] In order to make full use of the length of the sleeve 33, in some embodiments, the stop 331 is located near the end of the sleeve 33 opposite to the unwinding shaft 21. Figure 2 The sleeve 33 is positioned at the left end, which allows the length of the sleeve 33 to be fully utilized by the material roll, thus ensuring that the material roll is stably fitted onto the sleeve 33 and preventing the material roll from swaying relative to the sleeve 33.

[0110] Furthermore, to better prevent the material coil from swaying relative to the sleeve 33, in some embodiments, see [reference needed]. Figure 3 The roll preparation assembly 3 also includes a clamping assembly 34, which includes a first driving member 341 and a first abutting member 342. The first driving member 341 is disposed on the pusher 32, and the first abutting member 342 is connected to the first driving member 341. The first driving member 341 is used to drive the first abutting member 342 to move toward or away from the sleeve 33.

[0111] Since the first abutment 342 is connected to the first drive member 341, the first drive member 341 can drive the first abutment 342 to move towards or away from the sleeve 33. Therefore, when the pusher 32 pushes the material roll on the sleeve 33 to move relative to the sleeve 33 along the axial direction of the unwinding shaft 21, the first drive member 341 can drive the first abutment 342 to move towards the sleeve 33, so that the first abutment 342 abuts against the material roll on the sleeve 33. In this way, the first abutment 342 is like a person's hand holding the material roll, thereby preventing the material roll from swaying relative to the sleeve 33 during the process of moving relative to the sleeve 33 along the axial direction of the unwinding shaft 21.

[0112] In this embodiment, the first driving component 341 can be a cylinder and the first abutting component 342 can be an abutting block. Of course, the first driving component 341 and the first abutting component 342 can also be other possible structures, which are not limited in this embodiment.

[0113] Furthermore, the direction in which the first driving member 341 drives the first abutting member 342 can be the same as the radial direction of the sleeve 33. When the direction of movement of the first abutting member 342 is the same as the radial direction of the sleeve 33, the first abutting member 342 can just abut against the outer peripheral wall of the material roll when it moves towards the sleeve 33 along the radial direction of the sleeve 33. In this way, it can better support the material roll.

[0114] Furthermore, in order to better avoid the material roll swaying relative to the sleeve 33 during the movement of the material roll relative to the sleeve 33 along the axial direction of the unwinding shaft 21, in some embodiments, the number of clamping components 34 is multiple, and the multiple clamping components 34 are arranged at intervals around the outer peripheral wall of the sleeve 33.

[0115] By having multiple clamping components 34, and by having multiple clamping components 34 spaced apart around the outer peripheral wall of the sleeve 33, multiple first abutting members 342 can support the material roll from multiple angles and positions, thereby better preventing the material roll from shaking relative to the sleeve 33.

[0116] Specifically, the number of clamping components 34 can be as follows: Figure 3 The two shown are examples of clamping components 34. Of course, the number of clamping components 34 can also be three, four, or five, etc. This embodiment does not limit this.

[0117] To ensure smoother movement of the coil relative to the sleeve 33 along the axial direction of the unwinding shaft 21, in some embodiments, see [reference needed]. Figure 4 Rolling elements 332 are provided on the outer peripheral wall of sleeve 33.

[0118] By providing a rolling element 332 on the outer peripheral wall of the sleeve 33, the friction between the material roll and the outer peripheral wall of the sleeve 33 can be changed from static friction to rolling friction, thereby reducing the frictional force between the material roll and the outer peripheral wall of the sleeve 33. This makes the material roll move more smoothly relative to the sleeve 33 along the axial direction of the unwinding shaft 21.

[0119] It should be noted that the aforementioned rolling element 332 can be a roller or any component that makes the material roll move more smoothly relative to the sleeve 33 along the axial direction of the unwinding shaft 21. This embodiment does not limit this.

[0120] In some embodiments, see Figure 4 There are multiple rolling elements 332, and multiple rolling elements 332 are spaced apart along the axial direction parallel to the sleeve 33 to form a rolling element group 330. Multiple rolling element groups 330 are spaced apart along the circumferential direction of the sleeve 33.

[0121] By arranging multiple rolling elements 332 at intervals along an axial direction parallel to the sleeve 33 to form a rolling element group 330, the material roll can move more smoothly relative to the sleeve 33 along the axial direction of the unwinding shaft 21.

[0122] Furthermore, by circumferentially arranging multiple sets of rolling elements 330 on the sleeve 33, the friction between each position on the outer peripheral wall of the sleeve 33 and the material roll is relatively small, thereby making the material roll move more smoothly relative to the sleeve 33 along the axial direction of the unwinding shaft 21.

[0123] In some embodiments, see Figure 4 and Figure 5 , Figure 5 yes Figure 2 A partial structural diagram of the unwinding mechanism 100 is shown. The pre-winding assembly 3 also includes a limiting assembly 35. The limiting assembly 35 includes a connecting rod 351 and a second driving member 352. The second driving member 352 is disposed on the mounting member 1. The outer peripheral wall of the sleeve 33 is provided with a mounting groove 333 extending axially along the sleeve 33. The connecting rod 351 is rotatably disposed in the mounting groove 333 around the hinge portion 353 (not shown in the figure).

[0124] The connecting rod 351 includes a first end 3511 near the material roll section 212 and a second end 3512 opposite to the first end 3511. The first end 3511 and the second end 3512 are located on both sides of the hinge portion 353. A limit member 3511a is provided on the first end 3511, and the second driving member 352 is connected to the second end 3512.

[0125] Since the second driving member 352 is disposed on the mounting member 1 and connected to the second end 3512, and the first end 3511 is provided with a limiting member 3511a, and since the first end 3511 and the second end 3512 are located on both sides of the hinge portion 353, when the second driving member 352 drives the connecting rod 351 to rotate around the hinge portion 353 through the second end 3512, the limiting member 3511a can protrude from the outer peripheral wall of the sleeve 33 or be accommodated in the mounting groove 333.

[0126] Specifically, when the limiting member 3511a protrudes from the outer peripheral wall of the sleeve 33, the limiting member 3511a can prevent the material roll sleeved on the sleeve 33 from sliding along the unwinding shaft 21 towards the material roll section 212. In this way, when the material strip in the material roll on the material roll section 212 has not been unwound, the limiting member 3511a can protrude from the outer peripheral wall of the sleeve 33, thereby preventing the material roll on the sleeve 33 from abnormally sliding onto the material roll section 212 under vibration and other effects, thus affecting the normal unwinding of the material roll section 212, and making the operation of the unwinding mechanism 100 more reliable.

[0127] When the strip in the material roll in the material roll section 212 is unwound, the second driving member 352 can drive the connecting rod 351 to rotate around the hinge part 353 through the second end 3512, so that the limiting member 3511a is accommodated in the mounting groove 333. In this way, the blocking effect of the limiting member 3511a on the material roll will disappear, which will help the pushing member 32 to push the material roll sleeved on the sleeve 33 to the material roll section 212.

[0128] The second driving component 352 can be a pneumatic cylinder or an electric cylinder, etc., and this embodiment does not limit it. The limiting component 3511a can be a limiting protrusion.

[0129] In some embodiments, see Figure 1 The unwinding assembly 2 also includes a support base 22, a third driving member 23, and a fourth driving member 24. The support base 22 is slidably disposed on the mounting member 1 along an axial direction parallel to the unwinding shaft 21. The unwinding shaft 21 is rotatably disposed on the support base 22. The third driving member 23 is disposed on the support base 22 and connected to the unwinding shaft 21, and is used to drive the unwinding shaft 21 to rotate. The fourth driving member 24 is disposed on the mounting member 1 and connected to the support base 22, and is used to drive the support base 22 to slide along an axial direction parallel to the unwinding shaft 21.

[0130] Since the unwinding shaft 21 is rotatably mounted on the support base 22, and the third driving member 23 is mounted on the support base 22 and connected to the unwinding shaft 21, the third driving member 23 can drive the unwinding shaft 21 to rotate. When the unwinding shaft 21 rotates, the purpose of unwinding the material strip downstream can be achieved.

[0131] Since the support base 22 is slidably disposed on the mounting part 1 along the axial direction parallel to the unwinding shaft 21, and the fourth driving member 24 is disposed on the mounting part 1 and connected to the support base 22, the fourth driving member 24 can drive the support base 22 to slide along the axial direction parallel to the unwinding shaft 21, thereby driving the unwinding shaft 21 to slide along its own axial direction. When the unwinding shaft 21 slides along its own axial direction, it can play the role of correcting the position of the material strip along the width direction of the material strip.

[0132] The third driving component 23 can be a motor or any other possible mechanism, as long as it can drive the unwinding shaft 21 to rotate; this embodiment does not limit this. The fourth driving component 24 can be a cylinder or an electric cylinder, etc.; this embodiment does not limit this.

[0133] The aforementioned support base 22 can be slidably disposed on the mounting component 1 along the axial direction parallel to the unwinding shaft 21 via a slide rail assembly. Of course, the support base 22 can also be slidably disposed on the mounting component 1 along the axial direction parallel to the unwinding shaft 21 in other ways, and this embodiment does not limit this.

[0134] In some embodiments, see Figure 1 The sleeve 33 is fixed to the mounting part 1, and the support 22 and the sleeve 33 are located on both sides of the mounting part 1 along the axial direction of the unwinding shaft 21.

[0135] By positioning the support base 22 and the sleeve 33 on both sides of the mounting component 1 along the axial direction of the unwinding shaft 21, the support base 22 and the sleeve 33 can make full use of the space on both sides of the mounting component 1, making the overall unwinding mechanism 100 more compact in its structural layout.

[0136] Figure 6This is a schematic diagram of the structure of a roll changing device 200 provided in an embodiment of this application. See also: Figure 6 The winding device 200 includes multiple unwinding mechanisms 100.

[0137] The structure of the unwinding mechanism 100 can be the same as that of any of the unwinding mechanisms 100 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments. This embodiment will not repeat the description here.

[0138] In this embodiment, since the unwinding shaft 21 of the unwinding mechanism 100 has a low manufacturing cost and a high unwinding speed, when the rewinding device 200 includes the unwinding mechanism 100, the cost of the entire rewinding device 200 can be reduced to a certain extent, and the unwinding efficiency of the entire rewinding device 200 can be improved.

[0139] The number of unwinding mechanisms 100 can be multiple, for example, they can be as follows: Figure 6 The two shown are examples of this embodiment. Of course, the number of unwinding mechanisms 100 can also be three or four, etc. This embodiment does not limit this.

[0140] When there are multiple unwinding mechanisms 100, the multiple unwinding mechanisms 100 can unwind alternately, thus improving the continuity of unwinding.

[0141] Figure 7 This is a schematic diagram of the structure of a battery cell winding device 300 according to an embodiment of this application. See also: Figure 7 The battery cell winding equipment 300 includes a winding changer 200.

[0142] The structure of the roll changing device 200 can be the same as that of any of the roll changing devices 200 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments. This embodiment will not repeat the description here.

[0143] Since the rewinding device 200 has low cost and high unwinding efficiency, when the battery cell winding equipment 300 includes the rewinding device 200, the cost of the battery cell winding equipment 300 can be reduced while the efficiency of the battery cell winding equipment 300 in winding the battery cell can be improved.

[0144] In some embodiments, the cell winding device 300 further includes a winding needle 301, which, when rotated, can wrap the strip unwound by the unwinding shaft 21 around itself to form a cell.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An unwinding mechanism (100), characterized in that, include: An unwinding assembly (2) includes an unwinding shaft (21) which is rotatably disposed and includes a material roll segment (212). as well as, The roll preparation assembly (3) includes a feeding assembly (30) and a sleeve (33). The sleeve (33) is sleeved on the unwinding shaft (21) and located on one side of the roll section (212) along the axial direction of the unwinding shaft (21).

2. The unwinding mechanism (100) according to claim 1, characterized in that, The sleeve (33) is used to carry the material roll, and the feeding assembly (30) is used to drive the material roll to move axially along the unwinding shaft (21).

3. The unwinding mechanism (100) according to claim 2, characterized in that, The feeding assembly (30) includes: Driver component (31); and, A pusher (32) is connected to the drive assembly (31), which drives the pusher (32) to move axially along the unwinding shaft (21).

4. The unwinding mechanism (100) according to claim 3, characterized in that, The pusher (32) is provided with a pad (321) on the side facing the material roll section (212).

5. The unwinding mechanism (100) according to claim 3, characterized in that, The pusher (32) is sleeved on the sleeve (33).

6. The unwinding mechanism (100) according to claim 3, characterized in that, The pusher (32) is located on at least one side of the sleeve (33) along the radial direction of the sleeve (33).

7. The unwinding mechanism (100) according to claim 3, characterized in that, The backup file component (3) also includes: The clamping assembly (34) includes a first driving member (341) and a first abutting member (342). The first driving member (341) is disposed on the pusher member (32), and the first abutting member (342) is connected to the first driving member (341). The first driving member (341) is used to drive the first abutting member (342) to move toward or away from the sleeve (33).

8. The unwinding mechanism (100) according to claim 7, characterized in that, The number of clamping components (34) is multiple, and the multiple clamping components (34) are arranged at intervals around the outer peripheral wall of the sleeve (33).

9. The unwinding mechanism (100) according to claim 3, characterized in that, The unwinding mechanism (100) further includes a mounting component (1), and the pusher (32) is slidably disposed on the mounting component (1) along the axial direction of the unwinding shaft (21).

10. The unwinding mechanism (100) according to claim 1, characterized in that, The unwinding shaft (21) also includes: A connecting section (211) is connected to the material roll section (212), and a sleeve (33) is fitted onto the connecting section (211). The outer diameter of the connecting section (211) is smaller than the outer diameter of the material roll section (212).

11. The unwinding mechanism (100) according to claim 10, characterized in that, The sleeve (33) is coaxially arranged with the material roll section (212), and the outer diameter of the sleeve (33) is equal to the outer diameter of the material roll section (212).

12. The unwinding mechanism (100) according to claim 1, characterized in that, A baffle (331) is provided on the outer peripheral wall of the sleeve (33), and the baffle (331) protrudes radially from the outer peripheral wall of the sleeve (33).

13. The unwinding mechanism (100) according to claim 1, characterized in that, A rolling element (332) is provided on the outer peripheral wall of the sleeve (33).

14. The unwinding mechanism (100) according to claim 13, characterized in that, The number of the rolling elements (332) is multiple, and the multiple rolling elements (332) are arranged at intervals along an axial direction parallel to the sleeve (33) to form a rolling element group (330).

15. The unwinding mechanism (100) according to claim 14, characterized in that, Multiple sets of the rolling elements (330) are arranged at circumferential intervals along the sleeve (33).

16. The unwinding mechanism (100) according to claim 1, characterized in that, The backup file component (3) also includes: The limiting component (35) includes a connecting rod (351) and a second driving member (352). The outer peripheral wall of the sleeve (33) is provided with a mounting groove (333) extending axially along the sleeve (33). The connecting rod (351) is rotatably disposed in the mounting groove (333) around the hinge portion (353). The connecting rod (351) includes a first end (3511) and a second end (3512). The first end (3511) and the second end (3512) are located on both sides of the hinge (353), and the first end (3511) is close to the material roll section (212). A limiting member (3511a) is provided on the first end (3511), and the second driving member (352) is connected to the second end (3512).

17. The unwinding mechanism (100) according to claim 16, characterized in that, The second drive member (352) is used to drive the connecting rod (351) to rotate about the hinge portion (353) through the second end (3512) so that the limiting member (3511a) protrudes from the outer peripheral wall of the sleeve (33) or is accommodated in the mounting groove (333).

18. The unwinding mechanism (100) according to claim 1, characterized in that, The unwinding mechanism (100) further includes a mounting component (1), and the unwinding assembly (2) further includes: A support base (22) is slidably disposed on the mounting member (1) along an axial direction parallel to the unwinding shaft (21), and the unwinding shaft (21) is rotatably disposed on the support base (22); A third driving member (23), which is disposed on the support base (22) and connected to the unwinding shaft (21), is used to drive the unwinding shaft (21) to rotate; and, A fourth driving member (24) is disposed on the mounting member (1) and connected to the support base (22) for driving the support base (22) to slide along an axial direction parallel to the unwinding shaft (21).

19. The unwinding mechanism (100) according to claim 18, characterized in that, The sleeve (33) is fixed to the mounting component (1), and the support base (22) and the sleeve (33) are located on both sides of the mounting component (1) along the axial direction of the unwinding shaft (21).

20. A roll changing device (200), characterized in that, include: The unwinding mechanism (100) according to any one of claims 1-19.

21. The rewinding device (200) according to claim 20, characterized in that, The number of unwinding mechanisms (100) is multiple.

22. A battery cell winding device (300), characterized in that, Includes the roll changing device (200) as described in claim 20 or 21.

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